build, release-notes.md: Document 0.9.0 release

Update release notes and version number for the new release. Signed-off-by: Rob Bradford <robert.bradford@intel.com>
build: Bump vm-memory dependency
2026-08-05 02:19:16 +00:00 · 2020-08-06 14:31:36 +01:00 · 2020-08-06 14:26:47 +01:00 · 2020-08-06 09:29:36 +01:00 · 2020-08-06 08:29:50 +01:00 · 2020-08-06 07:25:30 +00:00
169 changed files with 18622 additions and 8651 deletions
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -26,4 +26,4 @@ jobs:
            override: true

      - name: Build
-        run: cargo build --release --target=${{ matrix.target }}
+        run: cargo build --all --release --target=${{ matrix.target }}
--- a/.github/workflows/cross-build.yaml
+++ b/.github/workflows/cross-build.yaml
@@ -24,11 +24,9 @@ jobs:
            override: true
      - name: Install arm64 libfdt
        run: wget http://ftp.us.debian.org/debian/pool/main/d/device-tree-compiler/libfdt-dev_1.6.0-1_arm64.deb && dpkg-deb -xv libfdt-dev_1.6.0-1_arm64.deb ./tlibfdtdev && sudo mkdir /tmmmp && mkdir target && mkdir target/debug && mkdir target/debug/deps && sudo cp ./tlibfdtdev/usr/lib/aarch64-linux-gnu/libfdt.a target/debug/deps/libfdt.a && echo "libfdt installed"
-      - name: Disable "with-serde" in kvm-bindings
-        run: sed -i 's/"with-serde",\ //g' vmm/Cargo.toml
      - name: Build
        uses: actions-rs/cargo@v1
        with:
          use-cross: true
          command: build
-          args: --target=${{ matrix.target }} --no-default-features --features "mmio"
+          args: --target=${{ matrix.target }} --no-default-features --features "mmio,kvm"
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -20,9 +20,9 @@ jobs:
            toolchain: stable
            target: x86_64-unknown-linux-musl
      - name: Build
-        run: cargo build --release --target=x86_64-unknown-linux-gnu
+        run: cargo build --all --release --target=x86_64-unknown-linux-gnu
      - name: Static Build
-        run: cargo build --release --target=x86_64-unknown-linux-musl
+        run: cargo build --all --release --target=x86_64-unknown-linux-musl
      - name: Strip cloud-hypervisor binaries
        run: strip target/*/release/cloud-hypervisor
      - name: Create Release
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -9,18 +9,24 @@ dependencies = [

 [[package]]
 name = "addr2line"
-version = "0.12.1"
+version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a49806b9dadc843c61e7c97e72490ad7f7220ae249012fbda9ad0609457c0543"
+checksum = "1b6a2d3371669ab3ca9797670853d61402b03d0b4b9ebf33d677dfa720203072"
 dependencies = [
 "gimli",
 ]

 [[package]]
-name = "aho-corasick"
-version = "0.7.10"
+name = "adler"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8716408b8bc624ed7f65d223ddb9ac2d044c0547b6fa4b0d554f3a9540496ada"
+checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "043164d8ba5c4c3035fec9bbee8647c0261d788f3474306f93bb65901cae0e86"
 dependencies = [
 "memchr",
 ]
@@ -31,14 +37,14 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 dependencies = [
- "winapi 0.3.8",
+ "winapi 0.3.9",
 ]

 [[package]]
 name = "anyhow"
-version = "1.0.31"
+version = "1.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85bb70cc08ec97ca5450e6eba421deeea5f172c0fc61f78b5357b2a8e8be195f"
+checksum = "6b602bfe940d21c130f3895acd65221e8a61270debe89d628b9cb4e3ccb8569b"

 [[package]]
 name = "arc-swap"
@@ -51,12 +57,13 @@ name = "arch"
 version = "0.1.0"
 dependencies = [
 "acpi_tables",
+ "anyhow",
 "arch_gen",
 "byteorder",
- "kvm-bindings",
- "kvm-ioctls",
+ "hypervisor",
 "libc",
 "linux-loader",
+ "log 0.4.11",
 "rand 0.7.3",
 "vm-memory",
 ]
@@ -85,7 +92,7 @@ checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
 dependencies = [
 "hermit-abi",
 "libc",
- "winapi 0.3.8",
+ "winapi 0.3.9",
 ]

 [[package]]
@@ -96,13 +103,14 @@ checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"

 [[package]]
 name = "backtrace"
-version = "0.3.48"
+version = "0.3.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0df2f85c8a2abbe3b7d7e748052fdd9b76a0458fdeb16ad4223f5eca78c7c130"
+checksum = "46254cf2fdcdf1badb5934448c1bcbe046a56537b3987d96c51a7afc5d03f293"
 dependencies = [
 "addr2line",
 "cfg-if",
 "libc",
+ "miniz_oxide",
 "object",
 "rustc-demangle",
 ]
@@ -136,6 +144,22 @@ dependencies = [
 "constant_time_eq",
 ]

+[[package]]
+name = "block_util"
+version = "0.1.0"
+dependencies = [
+ "io-uring",
+ "libc",
+ "log 0.4.11",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "virtio-bindings",
+ "vm-memory",
+ "vm-virtio",
+ "vmm-sys-util",
+]
+
 [[package]]
 name = "byteorder"
 version = "1.3.4"
@@ -144,9 +168,9 @@ checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"

 [[package]]
 name = "cc"
-version = "1.0.54"
+version = "1.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7bbb73db36c1246e9034e307d0fba23f9a2e251faa47ade70c1bd252220c8311"
+checksum = "f9a06fb2e53271d7c279ec1efea6ab691c35a2ae67ec0d91d7acec0caf13b518"

 [[package]]
 name = "cfg-if"
@@ -156,9 +180,9 @@ checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"

 [[package]]
 name = "clap"
-version = "2.33.1"
+version = "2.33.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdfa80d47f954d53a35a64987ca1422f495b8d6483c0fe9f7117b36c2a792129"
+checksum = "10040cdf04294b565d9e0319955430099ec3813a64c952b86a41200ad714ae48"
 dependencies = [
 "ansi_term",
 "atty",
@@ -172,32 +196,23 @@ dependencies = [

 [[package]]
 name = "cloud-hypervisor"
-version = "0.8.0"
+version = "0.9.0"
 dependencies = [
- "arc-swap",
 "clap",
 "credibility",
 "dirs",
- "epoll",
- "futures",
+ "hypervisor",
 "lazy_static",
 "libc",
- "log 0.4.8",
+ "log 0.4.11",
 "net_util",
 "seccomp",
 "serde_json",
 "ssh2",
 "tempdir",
 "tempfile",
- "vhost",
- "vhost_user_backend",
 "vhost_user_block",
- "vhost_user_fs",
 "vhost_user_net",
- "virtio-bindings",
- "vm-device",
- "vm-memory",
- "vm-virtio",
 "vmm",
 "vmm-sys-util",
 ]
@@ -248,7 +263,7 @@ dependencies = [
 "byteorder",
 "epoll",
 "libc",
- "log 0.4.8",
+ "log 0.4.11",
 "serde",
 "serde_derive",
 "serde_json",
@@ -261,11 +276,10 @@ dependencies = [

 [[package]]
 name = "dirs"
-version = "2.0.2"
+version = "3.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13aea89a5c93364a98e9b37b2fa237effbb694d5cfe01c5b70941f7eb087d5e3"
+checksum = "142995ed02755914747cc6ca76fc7e4583cd18578746716d0508ea6ed558b9ff"
 dependencies = [
- "cfg-if",
 "dirs-sys",
 ]

@@ -277,14 +291,14 @@ checksum = "8e93d7f5705de3e49895a2b5e0b8855a1c27f080192ae9c32a6432d50741a57a"
 dependencies = [
 "libc",
 "redox_users",
- "winapi 0.3.8",
+ "winapi 0.3.9",
 ]

 [[package]]
 name = "epoll"
-version = "4.1.0"
+version = "4.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "990bcfe26bea89669ede68c3f970f61d02568dbc8660317c98d805ea4e710685"
+checksum = "20df693c700404f7e19d4d6fae6b15215d2913c27955d2b9d6f2c0f537511cd0"
 dependencies = [
 "bitflags 1.2.1",
 "libc",
@@ -427,9 +441,9 @@ dependencies = [

 [[package]]
 name = "gimli"
-version = "0.21.0"
+version = "0.22.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bcc8e0c9bce37868955864dbecd2b1ab2bdf967e6f28066d65aaac620444b65c"
+checksum = "aaf91faf136cb47367fa430cd46e37a788775e7fa104f8b4bcb3861dc389b724"

 [[package]]
 name = "glob"
@@ -439,13 +453,31 @@ checksum = "8be18de09a56b60ed0edf84bc9df007e30040691af7acd1c41874faac5895bfb"

 [[package]]
 name = "hermit-abi"
-version = "0.1.13"
+version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91780f809e750b0a89f5544be56617ff6b1227ee485bcb06ebe10cdf89bd3b71"
+checksum = "3deed196b6e7f9e44a2ae8d94225d80302d81208b1bb673fd21fe634645c85a9"
 dependencies = [
 "libc",
 ]

+[[package]]
+name = "hypervisor"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "kvm-bindings",
+ "kvm-ioctls",
+ "libc",
+ "linux-loader",
+ "log 0.4.11",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "thiserror",
+ "vm-memory",
+ "vmm-sys-util",
+]
+
 [[package]]
 name = "idna"
 version = "0.2.0"
@@ -457,6 +489,15 @@ dependencies = [
 "unicode-normalization",
 ]

+[[package]]
+name = "io-uring"
+version = "0.3.5"
+source = "git+https://github.com/tokio-rs/io-uring.git?branch=0.4#c00d968b038263a02a72d6510edaf438b0c7b4f3"
+dependencies = [
+ "bitflags 1.2.1",
+ "libc",
+]
+
 [[package]]
 name = "ipnetwork"
 version = "0.16.0"
@@ -468,9 +509,9 @@ dependencies = [

 [[package]]
 name = "itoa"
-version = "0.4.5"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8b7a7c0c47db5545ed3fef7468ee7bb5b74691498139e4b3f6a20685dc6dd8e"
+checksum = "dc6f3ad7b9d11a0c00842ff8de1b60ee58661048eb8049ed33c73594f359d7e6"

 [[package]]
 name = "kernel32-sys"
@@ -485,7 +526,7 @@ dependencies = [
 [[package]]
 name = "kvm-bindings"
 version = "0.2.0"
-source = "git+https://github.com/cloud-hypervisor/kvm-bindings?branch=ch#3a6780089e0e2d69aaf77666524e81801c814bdd"
+source = "git+https://github.com/cloud-hypervisor/kvm-bindings?branch=ch#6453253aff8b804796bce547c7a23e09464b7491"
 dependencies = [
 "serde",
 "serde_derive",
@@ -495,7 +536,7 @@ dependencies = [
 [[package]]
 name = "kvm-ioctls"
 version = "0.5.0"
-source = "git+https://github.com/cloud-hypervisor/kvm-ioctls?branch=ch#5b7f1cc5de6d9664ee30e7d6a2f183499de0f685"
+source = "git+https://github.com/cloud-hypervisor/kvm-ioctls?branch=ch#37953e968b9064f42d6b71b7afc13872ac4171ce"
 dependencies = [
 "kvm-bindings",
 "libc",
@@ -510,15 +551,15 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"

 [[package]]
 name = "libc"
-version = "0.2.71"
+version = "0.2.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9457b06509d27052635f90d6466700c65095fdf75409b3fbdd903e988b886f49"
+checksum = "a2f02823cf78b754822df5f7f268fb59822e7296276d3e069d8e8cb26a14bd10"

 [[package]]
 name = "libssh2-sys"
-version = "0.2.17"
+version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d45f516b9b19ea6c940b9f36d36734062a153a2b4cc9ef31d82c54bb9780f525"
+checksum = "eafa907407504b0e683786d4aba47acf250f114d37357d56608333fd167dd0fc"
 dependencies = [
 "cc",
 "libc",
@@ -543,7 +584,7 @@ dependencies = [
 [[package]]
 name = "linux-loader"
 version = "0.1.0"
-source = "git+https://github.com/rust-vmm/linux-loader#1af92d21adfab105e05146625d7dace58892612d"
+source = "git+https://github.com/rust-vmm/linux-loader#b309c9df171bb6c3eba361382c54e82716c6824c"
 dependencies = [
 "vm-memory",
 ]
@@ -563,14 +604,14 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e19e8d5c34a3e0e2223db8e060f9e8264aeeb5c5fc64a4ee9965c062211c024b"
 dependencies = [
- "log 0.4.8",
+ "log 0.4.11",
 ]

 [[package]]
 name = "log"
-version = "0.4.8"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
+checksum = "4fabed175da42fed1fa0746b0ea71f412aa9d35e76e95e59b192c64b9dc2bf8b"
 dependencies = [
 "cfg-if",
 ]
@@ -590,11 +631,20 @@ checksum = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
 [[package]]
 name = "micro_http"
 version = "0.1.0"
-source = "git+https://github.com/firecracker-microvm/micro-http#c9ffb90aebdc77a8fade2e4196f311f9bbfcce82"
+source = "git+https://github.com/firecracker-microvm/micro-http#40309b72ee084b0a26d60208f0872bd7c986de45"
 dependencies = [
 "epoll",
 ]

+[[package]]
+name = "miniz_oxide"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be0f75932c1f6cfae3c04000e40114adf955636e19040f9c0a2c380702aa1c7f"
+dependencies = [
+ "adler",
+]
+
 [[package]]
 name = "net_gen"
 version = "0.1.0"
@@ -606,13 +656,18 @@ dependencies = [
 name = "net_util"
 version = "0.1.0"
 dependencies = [
+ "epoll",
 "lazy_static",
 "libc",
+ "log 0.4.11",
 "net_gen",
 "pnet",
 "rand 0.7.3",
 "serde",
 "serde_json",
+ "virtio-bindings",
+ "vm-memory",
+ "vm-virtio",
 "vmm-sys-util",
 ]

@@ -628,9 +683,9 @@ dependencies = [

 [[package]]
 name = "object"
-version = "0.19.0"
+version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cbca9424c482ee628fa549d9c812e2cd22f1180b9222c9200fdfa6eb31aecb2"
+checksum = "1ab52be62400ca80aa00285d25253d7f7c437b7375c4de678f5405d3afe82ca5"

 [[package]]
 name = "once_cell"
@@ -651,6 +706,10 @@ dependencies = [
 "vcpkg",
 ]

+[[package]]
+name = "option_parser"
+version = "0.1.0"
+
 [[package]]
 name = "parking_lot"
 version = "0.10.2"
@@ -672,7 +731,7 @@ dependencies = [
 "libc",
 "redox_syscall",
 "smallvec",
- "winapi 0.3.8",
+ "winapi 0.3.9",
 ]

 [[package]]
@@ -682,14 +741,13 @@ dependencies = [
 "anyhow",
 "byteorder",
 "devices",
- "kvm-bindings",
- "kvm-ioctls",
+ "hypervisor",
 "libc",
- "log 0.4.8",
+ "log 0.4.11",
 "serde",
 "serde_derive",
 "serde_json",
- "vfio-bindings 0.2.0 (git+https://github.com/rust-vmm/vfio-bindings)",
+ "vfio-bindings",
 "vfio-ioctls",
 "vm-allocator",
 "vm-device",
@@ -706,18 +764,18 @@ checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"

 [[package]]
 name = "pin-project"
-version = "0.4.20"
+version = "0.4.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e75373ff9037d112bb19bc61333a06a159eaeb217660dcfbea7d88e1db823919"
+checksum = "ca4433fff2ae79342e497d9f8ee990d174071408f28f726d6d83af93e58e48aa"
 dependencies = [
 "pin-project-internal",
 ]

 [[package]]
 name = "pin-project-internal"
-version = "0.4.20"
+version = "0.4.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10b4b44893d3c370407a1d6a5cfde7c41ae0478e31c516c85f67eb3adc51be6d"
+checksum = "2c0e815c3ee9a031fdf5af21c10aa17c573c9c6a566328d99e3936c34e36461f"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -732,9 +790,9 @@ checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"

 [[package]]
 name = "pkg-config"
-version = "0.3.17"
+version = "0.3.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05da548ad6865900e60eaba7f589cc0783590a92e940c26953ff81ddbab2d677"
+checksum = "d36492546b6af1463394d46f0c834346f31548646f6ba10849802c9c9a27ac33"

 [[package]]
 name = "pnet"
@@ -833,23 +891,23 @@ checksum = "237a5ed80e274dbc66f86bd59c1e25edc039660be53194b5fe0a482e0f2612ea"

 [[package]]
 name = "proc-macro-hack"
-version = "0.5.16"
+version = "0.5.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e0456befd48169b9f13ef0f0ad46d492cf9d2dbb918bcf38e01eed4ce3ec5e4"
+checksum = "99c605b9a0adc77b7211c6b1f722dcb613d68d66859a44f3d485a6da332b0598"

 [[package]]
 name = "proc-macro-nested"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0afe1bd463b9e9ed51d0e0f0b50b6b146aec855c56fd182bb242388710a9b6de"
+checksum = "eba180dafb9038b050a4c280019bbedf9f2467b61e5d892dcad585bb57aadc5a"

 [[package]]
 name = "proc-macro2"
-version = "1.0.18"
+version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "beae6331a816b1f65d04c45b078fd8e6c93e8071771f41b8163255bbd8d7c8fa"
+checksum = "04f5f085b5d71e2188cb8271e5da0161ad52c3f227a661a3c135fdf28e258b12"
 dependencies = [
- "unicode-xid 0.2.0",
+ "unicode-xid 0.2.1",
 ]

 [[package]]
@@ -858,10 +916,9 @@ version = "0.1.0"
 dependencies = [
 "byteorder",
 "libc",
- "log 0.4.8",
+ "log 0.4.11",
 "remain",
 "tempfile",
- "vm-virtio",
 "vmm-sys-util",
 ]

@@ -884,7 +941,7 @@ dependencies = [
 "libc",
 "rand_core 0.3.1",
 "rdrand",
- "winapi 0.3.8",
+ "winapi 0.3.9",
 ]

 [[package]]
@@ -954,9 +1011,9 @@ dependencies = [

 [[package]]
 name = "redox_syscall"
-version = "0.1.56"
+version = "0.1.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
+checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"

 [[package]]
 name = "redox_users"
@@ -989,9 +1046,9 @@ checksum = "26412eb97c6b088a6997e05f69403a802a92d520de2f8e63c2b65f9e0f47c4e8"

 [[package]]
 name = "remain"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99c861227fc40c8da6fdaa3d58144ac84c0537080a43eb1d7d45c28f88dcb888"
+checksum = "70ba1e78fa68412cb93ef642fd4d20b9a941be49ee9333875ebaf13112673ea7"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -1000,11 +1057,11 @@ dependencies = [

 [[package]]
 name = "remove_dir_all"
-version = "0.5.2"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
+checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
 dependencies = [
- "winapi 0.3.8",
+ "winapi 0.3.9",
 ]

 [[package]]
@@ -1046,22 +1103,22 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 [[package]]
 name = "seccomp"
 version = "0.1.0"
-source = "git+https://github.com/firecracker-microvm/firecracker?tag=v0.21.1#047a379eb041f9ceae35df5fa072d88cac55340e"
+source = "git+https://github.com/firecracker-microvm/firecracker?tag=v0.22.0#cc5387637c132e500b4857b80b5a239d8d732b77"
 dependencies = [
 "libc",
 ]

 [[package]]
 name = "serde"
-version = "1.0.111"
+version = "1.0.114"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9124df5b40cbd380080b2cc6ab894c040a3070d995f5c9dc77e18c34a8ae37d"
+checksum = "5317f7588f0a5078ee60ef675ef96735a1442132dc645eb1d12c018620ed8cd3"

 [[package]]
 name = "serde_derive"
-version = "1.0.111"
+version = "1.0.114"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f2c3ac8e6ca1e9c80b8be1023940162bf81ae3cffbb1809474152f2ce1eb250"
+checksum = "2a0be94b04690fbaed37cddffc5c134bf537c8e3329d53e982fe04c374978f8e"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -1070,9 +1127,9 @@ dependencies = [

 [[package]]
 name = "serde_json"
-version = "1.0.55"
+version = "1.0.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec2c5d7e739bc07a3e73381a39d61fdb5f671c60c1df26a130690665803d8226"
+checksum = "164eacbdb13512ec2745fb09d51fd5b22b0d65ed294a1dcf7285a360c80a675c"
 dependencies = [
 "itoa",
 "ryu",
@@ -1081,9 +1138,9 @@ dependencies = [

 [[package]]
 name = "signal-hook"
-version = "0.1.15"
+version = "0.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ff2db2112d6c761e12522c65f7768548bd6e8cd23d2a9dae162520626629bd6"
+checksum = "604508c1418b99dfe1925ca9224829bb2a8a9a04dda655cc01fcad46f4ab05ed"
 dependencies = [
 "libc",
 "signal-hook-registry",
@@ -1091,9 +1148,9 @@ dependencies = [

 [[package]]
 name = "signal-hook-registry"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94f478ede9f64724c5d173d7bb56099ec3e2d9fc2774aac65d34b8b890405f41"
+checksum = "a3e12110bc539e657a646068aaf5eb5b63af9d0c1f7b29c97113fad80e15f035"
 dependencies = [
 "arc-swap",
 "libc",
@@ -1107,15 +1164,15 @@ checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"

 [[package]]
 name = "smallvec"
-version = "1.4.0"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7cb5678e1615754284ec264d9bb5b4c27d2018577fd90ac0ceb578591ed5ee4"
+checksum = "3757cb9d89161a2f24e1cf78efa0c1fcff485d18e3f55e0aa3480824ddaa0f3f"

 [[package]]
 name = "ssh2"
-version = "0.8.1"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd3183fb5dfacfd604fd33be6f581eb060a54d5fdc828d49b41de3c9309459a9"
+checksum = "ba56d741dab9a295bcb131ebfbe57f8fea2e1b7ae203e9184f5d7648213e4460"
 dependencies = [
 "bitflags 1.2.1",
 "libc",
@@ -1131,13 +1188,13 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"

 [[package]]
 name = "syn"
-version = "1.0.31"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5304cfdf27365b7585c25d4af91b35016ed21ef88f17ced89c7093b43dba8b6"
+checksum = "e69abc24912995b3038597a7a593be5053eb0fb44f3cc5beec0deb421790c1f4"
 dependencies = [
 "proc-macro2",
 "quote",
- "unicode-xid 0.2.0",
+ "unicode-xid 0.2.1",
 ]

 [[package]]
@@ -1149,7 +1206,7 @@ dependencies = [
 "proc-macro2",
 "quote",
 "syn",
- "unicode-xid 0.2.0",
+ "unicode-xid 0.2.1",
 ]

 [[package]]
@@ -1222,7 +1279,7 @@ dependencies = [
 "rand 0.7.3",
 "redox_syscall",
 "remove_dir_all",
- "winapi 0.3.8",
+ "winapi 0.3.9",
 ]

 [[package]]
@@ -1242,7 +1299,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e4129646ca0ed8f45d09b929036bafad5377103edd06e50bf574b353d2b08d9"
 dependencies = [
 "libc",
- "winapi 0.3.8",
+ "winapi 0.3.9",
 ]

 [[package]]
@@ -1257,18 +1314,18 @@ dependencies = [

 [[package]]
 name = "thiserror"
-version = "1.0.19"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b13f926965ad00595dd129fa12823b04bbf866e9085ab0a5f2b05b850fbfc344"
+checksum = "7dfdd070ccd8ccb78f4ad66bf1982dc37f620ef696c6b5028fe2ed83dd3d0d08"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "1.0.19"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "893582086c2f98cde18f906265a65b5030a074b1046c674ae898be6519a7f479"
+checksum = "bd80fc12f73063ac132ac92aceea36734f04a1d93c1240c6944e23a3b8841793"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -1284,6 +1341,12 @@ dependencies = [
 "lazy_static",
 ]

+[[package]]
+name = "tinyvec"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53953d2d3a5ad81d9f844a32f14ebb121f50b650cd59d0ee2a07cf13c617efed"
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.4"
@@ -1295,18 +1358,18 @@ dependencies = [

 [[package]]
 name = "unicode-normalization"
-version = "0.1.12"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5479532badd04e128284890390c1e876ef7a993d0570b3597ae43dfa1d59afa4"
+checksum = "6fb19cf769fa8c6a80a162df694621ebeb4dafb606470b2b2fce0be40a98a977"
 dependencies = [
- "smallvec",
+ "tinyvec",
 ]

 [[package]]
 name = "unicode-width"
-version = "0.1.7"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
+checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"

 [[package]]
 name = "unicode-xid"
@@ -1316,9 +1379,9 @@ checksum = "36dff09cafb4ec7c8cf0023eb0b686cb6ce65499116a12201c9e11840ca01beb"

 [[package]]
 name = "unicode-xid"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"

 [[package]]
 name = "url"
@@ -1346,27 +1409,22 @@ checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 [[package]]
 name = "vfio-bindings"
 version = "0.2.0"
-source = "git+https://github.com/rust-vmm/vfio-bindings#f08cbcbf4041c981441d9c036c49ebad5098ed1c"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a21f546f2bda37f5a8cfb138c87f95b8e34d2d78d6a7a92ba3785f4e08604a7"
 dependencies = [
 "vmm-sys-util",
 ]

-[[package]]
-name = "vfio-bindings"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4a21f546f2bda37f5a8cfb138c87f95b8e34d2d78d6a7a92ba3785f4e08604a7"
-
 [[package]]
 name = "vfio-ioctls"
 version = "0.1.0"
-source = "git+https://github.com/cloud-hypervisor/vfio-ioctls?branch=ch#f6f81ee865cb60a24ad5d4ba8200940ed1d5d1f4"
+source = "git+https://github.com/cloud-hypervisor/vfio-ioctls?branch=ch#49cc3626f6787e2075493a511675c6851a13bbc0"
 dependencies = [
 "byteorder",
 "kvm-bindings",
 "kvm-ioctls",
- "log 0.4.8",
- "vfio-bindings 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.11",
+ "vfio-bindings",
 "vm-memory",
 "vmm-sys-util",
 ]
@@ -1374,7 +1432,7 @@ dependencies = [
 [[package]]
 name = "vhost"
 version = "0.1.0"
-source = "git+https://github.com/cloud-hypervisor/vhost?branch=dragonball#3e80cf531d278aeb7f947335a4eeca655e0f2c54"
+source = "git+https://github.com/cloud-hypervisor/vhost?branch=dragonball#422964150a69afd4611708076c60cb34c64a9856"
 dependencies = [
 "bitflags 1.2.1",
 "libc",
@@ -1387,7 +1445,7 @@ version = "0.1.0"
 dependencies = [
 "epoll",
 "libc",
- "log 0.4.8",
+ "log 0.4.11",
 "vhost",
 "virtio-bindings",
 "vm-memory",
@@ -1399,17 +1457,17 @@ dependencies = [
 name = "vhost_user_block"
 version = "0.1.0"
 dependencies = [
- "bitflags 1.2.1",
+ "block_util",
+ "clap",
 "epoll",
 "libc",
- "log 0.4.8",
+ "log 0.4.11",
+ "option_parser",
 "qcow",
 "vhost",
 "vhost_user_backend",
 "virtio-bindings",
 "vm-memory",
- "vm-virtio",
- "vmm",
 "vmm-sys-util",
 ]

@@ -1418,30 +1476,36 @@ name = "vhost_user_fs"
 version = "0.1.0"
 dependencies = [
 "bitflags 1.2.1",
+ "clap",
+ "epoll",
+ "futures",
 "libc",
- "log 0.4.8",
+ "log 0.4.11",
 "seccomp",
 "tempdir",
 "vhost",
+ "vhost_user_backend",
+ "virtio-bindings",
+ "virtio-devices",
 "vm-memory",
 "vm-virtio",
+ "vmm-sys-util",
 ]

 [[package]]
 name = "vhost_user_net"
 version = "0.1.0"
 dependencies = [
- "bitflags 1.2.1",
+ "clap",
 "epoll",
 "libc",
- "log 0.4.8",
+ "log 0.4.11",
 "net_util",
+ "option_parser",
 "vhost",
 "vhost_user_backend",
 "virtio-bindings",
 "vm-memory",
- "vm-virtio",
- "vmm",
 "vmm-sys-util",
 ]

@@ -1451,6 +1515,38 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ff512178285488516ed85f15b5d0113a7cdb89e9e8a760b269ae4f02b84bd6b"

+[[package]]
+name = "virtio-devices"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "arc-swap",
+ "block_util",
+ "byteorder",
+ "devices",
+ "epoll",
+ "io-uring",
+ "libc",
+ "log 0.4.11",
+ "net_gen",
+ "net_util",
+ "pci",
+ "seccomp",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "tempfile",
+ "vfio-ioctls",
+ "vhost",
+ "virtio-bindings",
+ "vm-allocator",
+ "vm-device",
+ "vm-memory",
+ "vm-migration",
+ "vm-virtio",
+ "vmm-sys-util",
+]
+
 [[package]]
 name = "vm-allocator"
 version = "0.1.0"
@@ -1475,12 +1571,12 @@ dependencies = [

 [[package]]
 name = "vm-memory"
-version = "0.2.1"
-source = "git+https://github.com/cloud-hypervisor/vm-memory?branch=ch#708e9aa5d4317f7044d9835fe5080287e9c76f21"
+version = "0.2.2"
+source = "git+https://github.com/cloud-hypervisor/vm-memory?branch=ch#b28148d201b464acdef3124116ea43bb645cfd2f"
 dependencies = [
 "arc-swap",
 "libc",
- "winapi 0.3.8",
+ "winapi 0.3.9",
 ]

 [[package]]
@@ -1498,28 +1594,12 @@ dependencies = [
 name = "vm-virtio"
 version = "0.1.0"
 dependencies = [
- "anyhow",
- "arc-swap",
- "byteorder",
- "devices",
- "epoll",
- "libc",
- "log 0.4.8",
- "net_gen",
- "net_util",
- "pci",
+ "log 0.4.11",
 "serde",
 "serde_derive",
 "serde_json",
- "tempfile",
- "vfio-ioctls",
- "vhost",
 "virtio-bindings",
- "vm-allocator",
- "vm-device",
 "vm-memory",
- "vm-migration",
- "vmm-sys-util",
 ]

 [[package]]
@@ -1530,18 +1610,19 @@ dependencies = [
 "anyhow",
 "arc-swap",
 "arch",
+ "block_util",
 "clap",
 "credibility",
 "devices",
 "epoll",
- "kvm-bindings",
- "kvm-ioctls",
+ "hypervisor",
 "lazy_static",
 "libc",
 "linux-loader",
- "log 0.4.8",
+ "log 0.4.11",
 "micro_http",
 "net_util",
+ "option_parser",
 "pci",
 "qcow",
 "seccomp",
@@ -1552,6 +1633,7 @@ dependencies = [
 "tempfile",
 "url",
 "vfio-ioctls",
+ "virtio-devices",
 "vm-allocator",
 "vm-device",
 "vm-memory",
@@ -1586,9 +1668,9 @@ checksum = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"

 [[package]]
 name = "winapi"
-version = "0.3.8"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
 dependencies = [
 "winapi-i686-pc-windows-gnu",
 "winapi-x86_64-pc-windows-gnu",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,74 +1,73 @@
 [package]
 name = "cloud-hypervisor"
-version = "0.8.0"
+version = "0.9.0"
 authors = ["The Cloud Hypervisor Authors"]
 edition = "2018"
 default-run = "cloud-hypervisor"
 build = "build.rs"

+[profile.release]
+lto = true
+
 [dependencies]
-arc-swap = ">=0.4.4"
-clap = { version = "2.33.1", features=["wrap_help"] }
-epoll = ">=4.0.1"
-futures = { version = "0.3.5", features = ["thread-pool"] }
-lazy_static = "1.4.0"
-libc = "0.2.71"
-log = { version = "0.4.8", features = ["std"] }
-seccomp = { git = "https://github.com/firecracker-microvm/firecracker", tag = "v0.21.1" }
-serde_json = ">=1.0.9"
-vhost_user_backend = { path = "vhost_user_backend"}
+clap = { version = "2.33.2", features = ["wrap_help"] }
+hypervisor = { path = "hypervisor" }
+libc = "0.2.74"
+log = { version = "0.4.11", features = ["std"] }
+seccomp = { git = "https://github.com/firecracker-microvm/firecracker", tag = "v0.22.0" }
+serde_json = "1.0.57"
 vhost_user_block = { path = "vhost_user_block"}
-vhost_user_fs = { path = "vhost_user_fs"}
 vhost_user_net = { path = "vhost_user_net"}
-virtio-bindings = { version = "0.1", features = ["virtio-v5_0_0"]}
 vmm = { path = "vmm" }
-vm-device = { path = "vm-device" }
-vm-memory = "0.2.1"
 vmm-sys-util = "0.6.1"
-vm-virtio = { path = "vm-virtio" }
-vhost_rs = { git = "https://github.com/cloud-hypervisor/vhost", branch = "dragonball", package = "vhost", features = ["vhost-user-slave"] }

 [patch.crates-io]
 vm-memory = { git = "https://github.com/cloud-hypervisor/vm-memory", branch = "ch" }

 [dev-dependencies]
-ssh2 = "0.8.1"
-dirs = "2.0.2"
+ssh2 = "0.8.2"
+dirs = "3.0.1"
 credibility = "0.1.3"
-tempdir= "0.3.7"
+tempdir = "0.3.7"
 lazy_static= "1.4.0"
 tempfile = "3.1.0"
-serde_json = ">=1.0.9"
+serde_json = "1.0.57"
 net_util = { path = "net_util" }

 [features]
-default = ["acpi", "pci", "cmos"]
+default = ["acpi", "pci", "cmos", "kvm"]
 acpi = ["vmm/acpi"]
 pci = ["vmm/pci_support"]
 mmio = ["vmm/mmio_support"]
 cmos = ["vmm/cmos"]
 fwdebug = ["vmm/fwdebug"]
+kvm = ["vmm/kvm"]
+io_uring = ["vmm/io_uring"]

 # Integration tests require a special environment to run in
 integration_tests = []

 [workspace]
 members = [
+    "acpi_tables",
    "arch",
+    "arch_gen",
+    "block_util",
    "devices",
-    "qcow",
+    "hypervisor",
+    "net_gen",
+    "net_util",
+    "option_parser",
    "pci",
-    "vmm",
-    "vm-virtio",
-    "vm-device",
-    "vm-migration",
-    "vhost_user_block",
+    "qcow",
    "vhost_user_backend",
+    "vhost_user_block",
    "vhost_user_fs",
    "vhost_user_net",
-    "net_util",
-    "acpi_tables",
-    "arch_gen",
-    "net_gen",
+    "virtio-devices",
+    "vmm",
    "vm-allocator",
+    "vm-device",
+    "vm-migration",
+    "vm-virtio"
 ]
--- a/24
+++ b/24
@@ -61,6 +61,9 @@ pipeline{
 							}
 						}
 						stage ('Run integration tests') {
+							options {
+								retry(3)
+							}
 							steps {
 								sh "scripts/dev_cli.sh tests --integration"
 							}
@@ -84,6 +87,9 @@ pipeline{
 							}
 						}
 						stage ('Run integration tests for musl') {
+							options {
+								retry(3)
+							}
 							steps {
 								sh "scripts/dev_cli.sh tests --integration --libc musl"
 							}
@@ -93,6 +99,22 @@ pipeline{
 			}
 		}
 	}
+	post {
+		regression {
+			script {
+				if (env.BRANCH_NAME == 'master') {
+					slackSend (color: '#ff0000', message: '"master" branch build is now failing')
+				}
+			}
+		}
+		fixed {
+			script {
+				if (env.BRANCH_NAME == 'master') {
+					slackSend (color: '#00ff00', message: '"master" branch build is now fixed')
+				}
+			}
+		}
+	}
 }

 def cancelPreviousBuilds() {
@@ -108,4 +130,4 @@ def cancelPreviousBuilds() {
 				build.doStop()
 			}
 		}
-}
+}
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@
 4. [rust-vmm dependency](#4-rust-vmm-dependency)
 	* [Firecracker and crosvm](#firecracker-and-crosvm)
 5. [Community](#5-community)
+	* [Contribute](#contribute)
 	* [Join us](#join-us)
 6. [Security](#6-security)

@@ -127,13 +128,13 @@ Firmware](https://github.com/cloud-hypervisor/rust-hypervisor-firmware) project
 an ELF
 formatted KVM firmware for `cloud-hypervisor` to directly boot into.

-We need to get the latest `rust-hypervisor-firmware` release and also a working cloud image. Here we will use a Clear Linux image:
+We need to get the latest `rust-hypervisor-firmware` release and also a working cloud image. Here we will use a Ubuntu image:

 ```shell
 $ pushd $CLOUDH
-$ wget https://download.clearlinux.org/releases/31890/clear/clear-31890-kvm.img.xz
-$ unxz clear-31890-kvm.img.xz
-$ wget https://github.com/cloud-hypervisor/rust-hypervisor-firmware/releases/download/0.2.6/hypervisor-fw
+$ wget https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img
+$ qemu-img convert -p -f qcow2 -O raw focal-server-cloudimg-amd64.img focal-server-cloudimg-amd64.raw
+$ wget https://github.com/cloud-hypervisor/rust-hypervisor-firmware/releases/download/0.2.8/hypervisor-fw
 $ popd
 ```

@@ -142,7 +143,7 @@ $ pushd $CLOUDH
 $ sudo setcap cap_net_admin+ep ./cloud-hypervisor/target/release/cloud-hypervisor
 $ ./cloud-hypervisor/target/release/cloud-hypervisor \
 	--kernel ./hypervisor-fw \
-	--disk path=clear-31890-kvm.img \
+	--disk path=focal-server-cloudimg-amd64.raw \
 	--cpus boot=4 \
 	--memory size=1024M \
 	--net "tap=,mac=,ip=,mask=" \
@@ -169,7 +170,7 @@ $ git clone --depth 1 https://github.com/cloud-hypervisor/linux.git -b virtio-fs
 $ pushd linux-cloud-hypervisor

 # Use the cloud-hypervisor kernel config to build your kernel
-$ cp $CLOUDH/cloud-hypervisor/resources/linux-config .config
+$ cp $CLOUDH/cloud-hypervisor/resources/linux-config-x86_64 .config
 $ make bzImage -j `nproc`
 $ popd
 ```
@@ -178,18 +179,18 @@ The `vmlinux` kernel image will then be located at `linux-cloud-hypervisor/arch/

 #### Disk image

-For the disk image, we will use a Clear Linux cloud image that contains a root partition:
+For the disk image, we will use a Ubuntu cloud image that contains a root partition:

 ```shell
 $ pushd $CLOUDH
-$ wget https://download.clearlinux.org/releases/31890/clear/clear-31890-kvm.img.xz
-$ unxz clear-31890-kvm.img.xz
+$ wget https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img
+$ qemu-img convert -p -f qcow2 -O raw focal-server-cloudimg-amd64.img focal-server-cloudimg-amd64.raw
 $ popd
 ```

 #### Booting the guest VM

-Now we can directly boot into our custom kernel and make it use the Clear Linux root partition.
+Now we can directly boot into our custom kernel and make it use the Ubuntu root partition.
 If we want to have 4 vCPUs and 512 MBytes of memory:

 ```shell
@@ -197,8 +198,8 @@ $ pushd $CLOUDH
 $ sudo setcap cap_net_admin+ep ./cloud-hypervisor/target/release/cloud-hypervisor
 $ ./cloud-hypervisor/target/release/cloud-hypervisor \
 	--kernel ./linux-cloud-hypervisor/arch/x86/boot/compressed/vmlinux.bin \
-	--disk path=clear-31890-kvm.img \
-	--cmdline "console=hvc0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda3" \
+	--disk path=focal-server-cloudimg-amd64.raw \
+	--cmdline "console=hvc0 root=/dev/vda1 rw" \
 	--cpus boot=4 \
 	--memory size=1024M \
 	--net "tap=,mac=,ip=,mask=" \
@@ -217,8 +218,8 @@ $ ./cloud-hypervisor/target/release/cloud-hypervisor \
 	--kernel ./linux-cloud-hypervisor/arch/x86/boot/compressed/vmlinux.bin \
 	--console off \
 	--serial tty \
-	--disk path=clear-31890-kvm.img \
-	--cmdline "console=ttyS0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda3" \
+	--disk path=focal-server-cloudimg-amd64.raw \
+	--cmdline "console=ttyS0 root=/dev/vda1 rw" \
 	--cpus boot=4 \
 	--memory size=1024M \
 	--net "tap=,mac=,ip=,mask=" \
@@ -229,8 +230,7 @@ $ ./cloud-hypervisor/target/release/cloud-hypervisor \

 `cloud-hypervisor` is in a very early, pre-alpha stage. Use at your own risk!

-As of 2020-04-23, the following cloud images are supported:
-* [Clear Linux](https://download.clearlinux.org/current/) (cloudguest and kvm)
+As of 2020-07-02, the following cloud images are supported:
 * [Ubuntu Bionic](https://cloud-images.ubuntu.com/bionic/current/) (cloudimg)
 * [Ubuntu Focal](https://cloud-images.ubuntu.com/focal/current/) (cloudimg)

@@ -287,6 +287,11 @@ crates as possible.

 # 5. Community

+The Cloud Hypervisor project follows the governance, and community guidelines described in
+the [Community](https://github.com/cloud-hypervisor/community) repository.
+
+## Contribute
+
 We are working on building a global, diverse and collaborative community around the Cloud Hypervisor project.
 Anyone who is interested in [contributing](CONTRIBUTING.md) to the project is welcome to participate.

--- a/acpi_tables/src/sdt.rs
+++ b/acpi_tables/src/sdt.rs
@@ -13,12 +13,12 @@ pub struct GenericAddress {
 }

 impl GenericAddress {
-    pub fn io_port_address(address: u16) -> Self {
+    pub fn io_port_address<T>(address: u16) -> Self {
        GenericAddress {
            address_space_id: 1,
-            register_bit_width: 8,
+            register_bit_width: 8 * std::mem::size_of::<T>() as u8,
            register_bit_offset: 0,
-            access_size: 1,
+            access_size: std::mem::size_of::<T>() as u8,
            address: u64::from(address),
        }
    }
--- a/arch/Cargo.toml
+++ b/arch/Cargo.toml
@@ -8,12 +8,12 @@ default = []
 acpi = ["acpi_tables"]

 [dependencies]
+anyhow = "1.0"
 byteorder = "1.3.4"
-kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch" }
-kvm-ioctls = { git = "https://github.com/cloud-hypervisor/kvm-ioctls", branch = "ch" }
-libc = "0.2.71"
+hypervisor = { path = "../hypervisor" }
+libc = "0.2.74"
+log = "0.4.11"
 vm-memory = { version = "0.2.1", features = ["backend-mmap"] }
-
 acpi_tables = { path = "../acpi_tables", optional = true }
 arch_gen = { path = "../arch_gen" }

--- a/arch/src/aarch64/fdt.rs
+++ b/arch/src/aarch64/fdt.rs
@@ -17,14 +17,20 @@ use super::super::DeviceType;
 use super::super::InitramfsConfig;
 use super::get_fdt_addr;
 use super::gic::GICDevice;
-use super::layout::FDT_MAX_SIZE;
+use super::layout::{
+    FDT_MAX_SIZE, MEM_32BIT_DEVICES_SIZE, MEM_32BIT_DEVICES_START, PCI_MMCONFIG_SIZE,
+    PCI_MMCONFIG_START,
+};
 use crate::aarch64::fdt::Error::CstringFDTTransform;
 use vm_memory::{Address, Bytes, GuestAddress, GuestMemory, GuestMemoryError, GuestMemoryMmap};

 // This is a value for uniquely identifying the FDT node declaring the interrupt controller.
 const GIC_PHANDLE: u32 = 1;
+// This is a value for uniquely identifying the FDT node declaring the MSI controller.
+const MSI_PHANDLE: u32 = 2;
 // This is a value for uniquely identifying the FDT node containing the clock definition.
-const CLOCK_PHANDLE: u32 = 2;
+const CLOCK_PHANDLE: u32 = 3;
+
 // Read the documentation specified when appending the root node to the FDT.
 const ADDRESS_CELLS: u32 = 0x2;
 const SIZE_CELLS: u32 = 0x2;
@@ -91,6 +97,7 @@ pub fn create_fdt<T: DeviceInfoForFDT + Clone + Debug>(
    device_info: &HashMap<(DeviceType, String), T>,
    gic_device: &Box<dyn GICDevice>,
    initrd: &Option<InitramfsConfig>,
+    pci_space_address: &Option<(u64, u64)>,
 ) -> Result<Vec<u8>> {
    // Alocate stuff necessary for the holding the blob.
    let mut fdt = vec![0; FDT_MAX_SIZE];
@@ -119,6 +126,9 @@ pub fn create_fdt<T: DeviceInfoForFDT + Clone + Debug>(
    create_clock_node(&mut fdt)?;
    create_psci_node(&mut fdt)?;
    create_devices_node(&mut fdt, device_info)?;
+    if let Some((pci_device_base, pci_device_size)) = pci_space_address {
+        create_pci_nodes(&mut fdt, *pci_device_base, *pci_device_size)?;
+    }

    // End Header node.
    append_end_node(&mut fdt)?;
@@ -389,6 +399,17 @@ fn create_gic_node(fdt: &mut Vec<u8>, gic_device: &Box<dyn GICDevice>) -> Result
    let gic_intr_prop = generate_prop32(&gic_intr);

    append_property(fdt, "interrupts", &gic_intr_prop)?;
+
+    if gic_device.msi_compatible() {
+        append_begin_node(fdt, "msic")?;
+        append_property_string(fdt, "compatible", gic_device.msi_compatiblility())?;
+        append_property_null(fdt, "msi-controller")?;
+        append_property_u32(fdt, "phandle", MSI_PHANDLE)?;
+        let msi_reg_prop = generate_prop64(gic_device.msi_properties());
+        append_property(fdt, "reg", &msi_reg_prop)?;
+        append_end_node(fdt)?;
+    }
+
    append_end_node(fdt)?;

    Ok(())
@@ -519,6 +540,10 @@ fn create_devices_node<T: DeviceInfoForFDT + Clone + Debug>(

    // Sort out virtio devices by address from low to high and insert them into fdt table.
    ordered_virtio_device.sort_by(|a, b| a.addr().cmp(&b.addr()));
+    // Current address allocation strategy in cloud-hypervisor is: the first created device
+    // will be allocated to higher address. Here we reverse the vector to make sure that
+    // the older created device will appear in front of the newer created device in FDT.
+    ordered_virtio_device.reverse();
    for ordered_device_info in ordered_virtio_device.drain(..) {
        create_virtio_node(fdt, ordered_device_info)?;
    }
@@ -526,85 +551,45 @@ fn create_devices_node<T: DeviceInfoForFDT + Clone + Debug>(
    Ok(())
 }

-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::aarch64::gic::create_gic;
-    use crate::aarch64::layout;
-    use kvm_ioctls::Kvm;
+fn create_pci_nodes(fdt: &mut Vec<u8>, pci_device_base: u64, pci_device_size: u64) -> Result<()> {
+    // Add node for PCIe controller.
+    // See Documentation/devicetree/bindings/pci/host-generic-pci.txt in the kernel
+    // and https://elinux.org/Device_Tree_Usage.
+    let ranges = generate_prop32(&[
+        // mmio addresses
+        0x2000000,                                // (ss = 10: 32-bit memory space)
+        (MEM_32BIT_DEVICES_START.0 >> 32) as u32, // PCI address
+        MEM_32BIT_DEVICES_START.0 as u32,
+        (MEM_32BIT_DEVICES_START.0 >> 32) as u32, // CPU address
+        MEM_32BIT_DEVICES_START.0 as u32,
+        (MEM_32BIT_DEVICES_SIZE >> 32) as u32, // size
+        MEM_32BIT_DEVICES_SIZE as u32,
+        // device addresses
+        0x3000000,                      // (ss = 11: 64-bit memory space)
+        (pci_device_base >> 32) as u32, // PCI address
+        pci_device_base as u32,
+        (pci_device_base >> 32) as u32, // CPU address
+        pci_device_base as u32,
+        (pci_device_size >> 32) as u32, // size
+        pci_device_size as u32,
+    ]);
+    let bus_range = generate_prop32(&[0, 0]); // Only bus 0
+    let reg = generate_prop64(&[PCI_MMCONFIG_START.0, PCI_MMCONFIG_SIZE]);

-    const LEN: u64 = 4096;
+    append_begin_node(fdt, "pci")?;
+    append_property_string(fdt, "compatible", "pci-host-ecam-generic")?;
+    append_property_string(fdt, "device_type", "pci")?;
+    append_property(fdt, "ranges", &ranges)?;
+    append_property(fdt, "bus-range", &bus_range)?;
+    append_property_u32(fdt, "#address-cells", 3)?;
+    append_property_u32(fdt, "#size-cells", 2)?;
+    append_property(fdt, "reg", &reg)?;
+    append_property_u32(fdt, "#interrupt-cells", 1)?;
+    append_property_null(fdt, "interrupt-map")?;
+    append_property_null(fdt, "interrupt-map-mask")?;
+    append_property_null(fdt, "dma-coherent")?;
+    append_property_u32(fdt, "msi-parent", MSI_PHANDLE)?;
+    append_end_node(fdt)?;

-    #[derive(Clone, Debug)]
-    pub struct MMIODeviceInfo {
-        addr: u64,
-        irq: u32,
-    }
-
-    impl DeviceInfoForFDT for MMIODeviceInfo {
-        fn addr(&self) -> u64 {
-            self.addr
-        }
-        fn irq(&self) -> u32 {
-            self.irq
-        }
-        fn length(&self) -> u64 {
-            LEN
-        }
-    }
-
-    // The `load` function from the `device_tree` will mistakenly check the actual size
-    // of the buffer with the allocated size. This works around that.
-    fn set_size(buf: &mut [u8], pos: usize, val: usize) {
-        buf[pos] = ((val >> 24) & 0xff) as u8;
-        buf[pos + 1] = ((val >> 16) & 0xff) as u8;
-        buf[pos + 2] = ((val >> 8) & 0xff) as u8;
-        buf[pos + 3] = (val & 0xff) as u8;
-    }
-
-    #[test]
-    fn test_create_fdt_with_devices() {
-        let mut regions = Vec::new();
-        regions.push((
-            GuestAddress(layout::RAM_64BIT_START),
-            (layout::FDT_MAX_SIZE + 0x1000) as usize,
-        ));
-        let mem = GuestMemoryMmap::from_ranges(&regions).expect("Cannot initialize memory");
-
-        let dev_info: HashMap<(DeviceType, std::string::String), MMIODeviceInfo> = [
-            (
-                (DeviceType::Serial, DeviceType::Serial.to_string()),
-                MMIODeviceInfo { addr: 0x00, irq: 1 },
-            ),
-            (
-                (DeviceType::Virtio(1), "virtio".to_string()),
-                MMIODeviceInfo {
-                    addr: 0x00 + LEN,
-                    irq: 2,
-                },
-            ),
-            (
-                (DeviceType::RTC, "rtc".to_string()),
-                MMIODeviceInfo {
-                    addr: 0x00 + 2 * LEN,
-                    irq: 3,
-                },
-            ),
-        ]
-        .iter()
-        .cloned()
-        .collect();
-        let kvm = Kvm::new().unwrap();
-        let vm = kvm.create_vm().unwrap();
-        let gic = create_gic(&vm, 1).unwrap();
-        assert!(create_fdt(
-            &mem,
-            &CString::new("console=tty0").unwrap(),
-            vec![0],
-            &dev_info,
-            &gic,
-            &None,
-        )
-        .is_ok())
-    }
+    Ok(())
 }
--- a/arch/src/aarch64/gic.rs
+++ b/arch/src/aarch64/gic.rs
@@ -1,33 +1,22 @@
 // Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0

-use std::{boxed::Box, result};
-
-use kvm_ioctls::{DeviceFd, VmFd};
-
-use super::gicv2::GICv2;
-use super::gicv3::GICv3;
+use std::result;
+use std::sync::Arc;

 /// Errors thrown while setting up the GIC.
 #[derive(Debug)]
 pub enum Error {
    /// Error while calling KVM ioctl for setting up the global interrupt controller.
-    CreateGIC(kvm_ioctls::Error),
+    CreateGIC(hypervisor::HypervisorVmError),
    /// Error while setting device attributes for the GIC.
-    SetDeviceAttribute(kvm_ioctls::Error),
+    SetDeviceAttribute(hypervisor::HypervisorDeviceError),
 }
 type Result<T> = result::Result<T, Error>;

-/// Trait for GIC devices.
-pub trait GICDevice: Send + Sync {
-    /// Returns the file descriptor of the GIC device
-    fn device_fd(&self) -> &DeviceFd;
-
-    /// Returns an array with GIC device properties
-    fn device_properties(&self) -> &[u64];
-
-    /// Returns the number of vCPUs this GIC handles
-    fn vcpu_count(&self) -> u64;
+pub trait GICDevice {
+    /// Returns the hypervisor agnostic Device of the GIC device
+    fn device(&self) -> &Arc<dyn hypervisor::Device>;

    /// Returns the fdt compatibility property of the device
    fn fdt_compatibility(&self) -> &str;
@@ -35,125 +24,151 @@ pub trait GICDevice: Send + Sync {
    /// Returns the maint_irq fdt property of the device
    fn fdt_maint_irq(&self) -> u32;

-    /// Returns the GIC version of the device
-    fn version() -> u32
-    where
-        Self: Sized;
+    /// Returns an array with GIC device properties
+    fn device_properties(&self) -> &[u64];

-    /// Create the GIC device object
-    fn create_device(fd: DeviceFd, vcpu_count: u64) -> Box<dyn GICDevice>
-    where
-        Self: Sized;
+    /// Returns the number of vCPUs this GIC handles
+    fn vcpu_count(&self) -> u64;

-    /// Setup the device-specific attributes
-    fn init_device_attributes(gic_device: &Box<dyn GICDevice>) -> Result<()>
-    where
-        Self: Sized;
-
-    /// Initialize a GIC device
-    fn init_device(vm: &VmFd) -> Result<DeviceFd>
-    where
-        Self: Sized,
-    {
-        let mut gic_device = kvm_bindings::kvm_create_device {
-            type_: Self::version(),
-            fd: 0,
-            flags: 0,
-        };
-
-        vm.create_device(&mut gic_device).map_err(Error::CreateGIC)
+    /// Returns whether the GIC device is MSI compatible or not
+    fn msi_compatible(&self) -> bool {
+        false
    }

-    /// Set a GIC device attribute
-    fn set_device_attribute(
-        fd: &DeviceFd,
-        group: u32,
-        attr: u64,
-        addr: u64,
-        flags: u32,
-    ) -> Result<()>
-    where
-        Self: Sized,
-    {
-        let attr = kvm_bindings::kvm_device_attr {
-            group: group,
-            attr: attr,
-            addr: addr,
-            flags: flags,
-        };
-        fd.set_device_attr(&attr)
-            .map_err(Error::SetDeviceAttribute)?;
-
-        Ok(())
+    /// Returns the MSI compatibility property of the device
+    fn msi_compatiblility(&self) -> &str {
+        ""
    }

-    /// Finalize the setup of a GIC device
-    fn finalize_device(gic_device: &Box<dyn GICDevice>) -> Result<()>
-    where
-        Self: Sized,
-    {
-        /* We need to tell the kernel how many irqs to support with this vgic.
-         * See the `layout` module for details.
-         */
-        let nr_irqs: u32 = super::layout::IRQ_MAX - super::layout::IRQ_BASE + 1;
-        let nr_irqs_ptr = &nr_irqs as *const u32;
-        Self::set_device_attribute(
-            gic_device.device_fd(),
-            kvm_bindings::KVM_DEV_ARM_VGIC_GRP_NR_IRQS,
-            0,
-            nr_irqs_ptr as u64,
-            0,
-        )?;
-
-        /* Finalize the GIC.
-         * See https://code.woboq.org/linux/linux/virt/kvm/arm/vgic/vgic-kvm-device.c.html#211.
-         */
-        Self::set_device_attribute(
-            gic_device.device_fd(),
-            kvm_bindings::KVM_DEV_ARM_VGIC_GRP_CTRL,
-            u64::from(kvm_bindings::KVM_DEV_ARM_VGIC_CTRL_INIT),
-            0,
-            0,
-        )?;
-
-        Ok(())
-    }
-
-    /// Method to initialize the GIC device
-    fn new(vm: &VmFd, vcpu_count: u64) -> Result<Box<dyn GICDevice>>
-    where
-        Self: Sized,
-    {
-        let vgic_fd = Self::init_device(vm)?;
-
-        let device = Self::create_device(vgic_fd, vcpu_count);
-
-        Self::init_device_attributes(&device)?;
-
-        Self::finalize_device(&device)?;
-
-        Ok(device)
+    /// Returns the MSI reg property of the device
+    fn msi_properties(&self) -> &[u64] {
+        &[]
    }
 }

-/// Create a GIC device.
-///
-/// It will try to create by default a GICv3 device. If that fails it will try
-/// to fall-back to a GICv2 device.
-pub fn create_gic(vm: &VmFd, vcpu_count: u64) -> Result<Box<dyn GICDevice>> {
-    GICv3::new(vm, vcpu_count).or_else(|_| GICv2::new(vm, vcpu_count))
-}
+pub mod kvm {
+    use super::GICDevice;
+    use super::Result;
+    use crate::aarch64::gicv2::kvm::KvmGICv2;
+    use crate::aarch64::gicv3::kvm::KvmGICv3;
+    use crate::aarch64::gicv3_its::kvm::KvmGICv3ITS;
+    use crate::layout;
+    use hypervisor::kvm::kvm_bindings;
+    use std::boxed::Box;
+    use std::sync::Arc;

-#[cfg(test)]
-mod tests {
+    /// Trait for GIC devices.
+    pub trait KvmGICDevice: Send + Sync + GICDevice {
+        /// Returns the GIC version of the device
+        fn version() -> u32;

-    use super::*;
-    use kvm_ioctls::Kvm;
+        /// Create the GIC device object
+        fn create_device(
+            device: Arc<dyn hypervisor::Device>,
+            vcpu_count: u64,
+        ) -> Box<dyn GICDevice>;

-    #[test]
-    fn test_create_gic() {
-        let kvm = Kvm::new().unwrap();
-        let vm = kvm.create_vm().unwrap();
-        assert!(create_gic(&vm, 1).is_ok());
+        /// Setup the device-specific attributes
+        fn init_device_attributes(
+            vm: &Arc<dyn hypervisor::Vm>,
+            gic_device: &Box<dyn GICDevice>,
+        ) -> Result<()>;
+
+        /// Initialize a GIC device
+        fn init_device(vm: &Arc<dyn hypervisor::Vm>) -> Result<Arc<dyn hypervisor::Device>> {
+            let mut gic_device = kvm_bindings::kvm_create_device {
+                type_: Self::version(),
+                fd: 0,
+                flags: 0,
+            };
+
+            vm.create_device(&mut gic_device)
+                .map_err(super::Error::CreateGIC)
+        }
+
+        /// Set a GIC device attribute
+        fn set_device_attribute(
+            device: &Arc<dyn hypervisor::Device>,
+            group: u32,
+            attr: u64,
+            addr: u64,
+            flags: u32,
+        ) -> Result<()> {
+            let attr = kvm_bindings::kvm_device_attr {
+                group: group,
+                attr: attr,
+                addr: addr,
+                flags: flags,
+            };
+            device
+                .set_device_attr(&attr)
+                .map_err(super::Error::SetDeviceAttribute)?;
+
+            Ok(())
+        }
+
+        /// Finalize the setup of a GIC device
+        fn finalize_device(gic_device: &Box<dyn GICDevice>) -> Result<()> {
+            /* We need to tell the kernel how many irqs to support with this vgic.
+             * See the `layout` module for details.
+             */
+            let nr_irqs: u32 = layout::IRQ_MAX - layout::IRQ_BASE + 1;
+            let nr_irqs_ptr = &nr_irqs as *const u32;
+            Self::set_device_attribute(
+                gic_device.device(),
+                kvm_bindings::KVM_DEV_ARM_VGIC_GRP_NR_IRQS,
+                0,
+                nr_irqs_ptr as u64,
+                0,
+            )?;
+
+            /* Finalize the GIC.
+             * See https://code.woboq.org/linux/linux/virt/kvm/arm/vgic/vgic-kvm-device.c.html#211.
+             */
+            Self::set_device_attribute(
+                gic_device.device(),
+                kvm_bindings::KVM_DEV_ARM_VGIC_GRP_CTRL,
+                u64::from(kvm_bindings::KVM_DEV_ARM_VGIC_CTRL_INIT),
+                0,
+                0,
+            )?;
+
+            Ok(())
+        }
+
+        /// Method to initialize the GIC device
+        fn new(vm: &Arc<dyn hypervisor::Vm>, vcpu_count: u64) -> Result<Box<dyn GICDevice>> {
+            let vgic_fd = Self::init_device(vm)?;
+
+            let device = Self::create_device(vgic_fd, vcpu_count);
+
+            Self::init_device_attributes(vm, &device)?;
+
+            Self::finalize_device(&device)?;
+
+            Ok(device)
+        }
+    }
+
+    /// Create a GIC device.
+    ///
+    /// It will try to create by default a GICv3 device. If that fails it will try
+    /// to fall-back to a GICv2 device.
+    pub fn create_gic(
+        vm: &Arc<dyn hypervisor::Vm>,
+        vcpu_count: u64,
+        its_required: bool,
+    ) -> Result<Box<dyn GICDevice>> {
+        if its_required {
+            KvmGICv3ITS::new(vm, vcpu_count)
+        } else {
+            KvmGICv3ITS::new(vm, vcpu_count).or_else(|_| {
+                debug!("Failed to create GICv3-ITS, will try GICv3 instead.");
+                KvmGICv3::new(vm, vcpu_count).or_else(|_| {
+                    debug!("Failed to create GICv3, will try GICv2 instead.");
+                    KvmGICv2::new(vm, vcpu_count)
+                })
+            })
+        }
    }
 }
--- a/arch/src/aarch64/gicv2.rs
+++ b/arch/src/aarch64/gicv2.rs
@@ -1,114 +1,124 @@
 // Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0

-use std::{boxed::Box, result};
+pub mod kvm {
+    use crate::aarch64::gic::kvm::KvmGICDevice;
+    use crate::aarch64::gic::{Error, GICDevice};
+    use std::{boxed::Box, result};
+    type Result<T> = result::Result<T, Error>;
+    use crate::layout;
+    use hypervisor::kvm::kvm_bindings;
+    use std::sync::Arc;

-use kvm_ioctls::DeviceFd;
+    /// Represent a GIC v2 device
+    pub struct KvmGICv2 {
+        /// The hypervisor agnostic device
+        device: Arc<dyn hypervisor::Device>,

-use super::gic::{Error, GICDevice};
+        /// GIC device properties, to be used for setting up the fdt entry
+        properties: [u64; 4],

-type Result<T> = result::Result<T, Error>;
-
-/// Represent a GIC v2 device
-pub struct GICv2 {
-    /// The file descriptor for the KVM device
-    fd: DeviceFd,
-
-    /// GIC device properties, to be used for setting up the fdt entry
-    properties: [u64; 4],
-
-    /// Number of CPUs handled by the device
-    vcpu_count: u64,
-}
-
-impl GICv2 {
-    // Unfortunately bindgen omits defines that are based on other defines.
-    // See arch/arm64/include/uapi/asm/kvm.h file from the linux kernel.
-    const KVM_VGIC_V2_DIST_SIZE: u64 = 0x1000;
-    const KVM_VGIC_V2_CPU_SIZE: u64 = 0x2000;
-
-    // Device trees specific constants
-    const ARCH_GIC_V2_MAINT_IRQ: u32 = 8;
-
-    /// Get the address of the GICv2 distributor.
-    const fn get_dist_addr() -> u64 {
-        super::layout::MAPPED_IO_START - GICv2::KVM_VGIC_V2_DIST_SIZE
+        /// Number of CPUs handled by the device
+        vcpu_count: u64,
    }

-    /// Get the size of the GIC_v2 distributor.
-    const fn get_dist_size() -> u64 {
-        GICv2::KVM_VGIC_V2_DIST_SIZE
+    impl KvmGICv2 {
+        // Unfortunately bindgen omits defines that are based on other defines.
+        // See arch/arm64/include/uapi/asm/kvm.h file from the linux kernel.
+        const KVM_VGIC_V2_DIST_SIZE: u64 = 0x1000;
+        const KVM_VGIC_V2_CPU_SIZE: u64 = 0x2000;
+
+        // Device trees specific constants
+        const ARCH_GIC_V2_MAINT_IRQ: u32 = 8;
+
+        /// Get the address of the GICv2 distributor.
+        const fn get_dist_addr() -> u64 {
+            layout::MAPPED_IO_START - KvmGICv2::KVM_VGIC_V2_DIST_SIZE
+        }
+
+        /// Get the size of the GIC_v2 distributor.
+        const fn get_dist_size() -> u64 {
+            KvmGICv2::KVM_VGIC_V2_DIST_SIZE
+        }
+
+        /// Get the address of the GIC_v2 CPU.
+        const fn get_cpu_addr() -> u64 {
+            KvmGICv2::get_dist_addr() - KvmGICv2::KVM_VGIC_V2_CPU_SIZE
+        }
+
+        /// Get the size of the GIC_v2 CPU.
+        const fn get_cpu_size() -> u64 {
+            KvmGICv2::KVM_VGIC_V2_CPU_SIZE
+        }
    }

-    /// Get the address of the GIC_v2 CPU.
-    const fn get_cpu_addr() -> u64 {
-        GICv2::get_dist_addr() - GICv2::KVM_VGIC_V2_CPU_SIZE
+    impl GICDevice for KvmGICv2 {
+        fn device(&self) -> &Arc<dyn hypervisor::Device> {
+            &self.device
+        }
+
+        fn device_properties(&self) -> &[u64] {
+            &self.properties
+        }
+
+        fn fdt_compatibility(&self) -> &str {
+            "arm,gic-400"
+        }
+
+        fn fdt_maint_irq(&self) -> u32 {
+            KvmGICv2::ARCH_GIC_V2_MAINT_IRQ
+        }
+
+        fn vcpu_count(&self) -> u64 {
+            self.vcpu_count
+        }
    }

-    /// Get the size of the GIC_v2 CPU.
-    const fn get_cpu_size() -> u64 {
-        GICv2::KVM_VGIC_V2_CPU_SIZE
-    }
-}
-
-impl GICDevice for GICv2 {
-    fn version() -> u32 {
-        kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_V2
-    }
-
-    fn device_fd(&self) -> &DeviceFd {
-        &self.fd
-    }
-
-    fn device_properties(&self) -> &[u64] {
-        &self.properties
-    }
-
-    fn vcpu_count(&self) -> u64 {
-        self.vcpu_count
-    }
-
-    fn fdt_compatibility(&self) -> &str {
-        "arm,gic-400"
-    }
-
-    fn fdt_maint_irq(&self) -> u32 {
-        GICv2::ARCH_GIC_V2_MAINT_IRQ
-    }
-
-    fn create_device(fd: DeviceFd, vcpu_count: u64) -> Box<dyn GICDevice> {
-        Box::new(GICv2 {
-            fd: fd,
-            properties: [
-                GICv2::get_dist_addr(),
-                GICv2::get_dist_size(),
-                GICv2::get_cpu_addr(),
-                GICv2::get_cpu_size(),
-            ],
-            vcpu_count: vcpu_count,
-        })
-    }
-
-    fn init_device_attributes(gic_device: &Box<dyn GICDevice>) -> Result<()> {
-        /* Setting up the distributor attribute.
-        We are placing the GIC below 1GB so we need to substract the size of the distributor. */
-        Self::set_device_attribute(
-            &gic_device.device_fd(),
-            kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
-            u64::from(kvm_bindings::KVM_VGIC_V2_ADDR_TYPE_DIST),
-            &GICv2::get_dist_addr() as *const u64 as u64,
-            0,
-        )?;
-
-        /* Setting up the CPU attribute. */
-        Self::set_device_attribute(
-            &gic_device.device_fd(),
-            kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
-            u64::from(kvm_bindings::KVM_VGIC_V2_ADDR_TYPE_CPU),
-            &GICv2::get_cpu_addr() as *const u64 as u64,
-            0,
-        )?;
-
-        Ok(())
+    impl KvmGICDevice for KvmGICv2 {
+        fn version() -> u32 {
+            kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_V2
+        }
+
+        fn create_device(
+            device: Arc<dyn hypervisor::Device>,
+            vcpu_count: u64,
+        ) -> Box<dyn GICDevice> {
+            Box::new(KvmGICv2 {
+                device: device,
+                properties: [
+                    KvmGICv2::get_dist_addr(),
+                    KvmGICv2::get_dist_size(),
+                    KvmGICv2::get_cpu_addr(),
+                    KvmGICv2::get_cpu_size(),
+                ],
+                vcpu_count: vcpu_count,
+            })
+        }
+
+        fn init_device_attributes(
+            _vm: &Arc<dyn hypervisor::Vm>,
+            gic_device: &Box<dyn GICDevice>,
+        ) -> Result<()> {
+            /* Setting up the distributor attribute.
+            We are placing the GIC below 1GB so we need to substract the size of the distributor. */
+            Self::set_device_attribute(
+                gic_device.device(),
+                kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
+                u64::from(kvm_bindings::KVM_VGIC_V2_ADDR_TYPE_DIST),
+                &KvmGICv2::get_dist_addr() as *const u64 as u64,
+                0,
+            )?;
+
+            /* Setting up the CPU attribute. */
+            Self::set_device_attribute(
+                gic_device.device(),
+                kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
+                u64::from(kvm_bindings::KVM_VGIC_V2_ADDR_TYPE_CPU),
+                &KvmGICv2::get_cpu_addr() as *const u64 as u64,
+                0,
+            )?;
+
+            Ok(())
+        }
    }
 }
--- a/arch/src/aarch64/gicv3.rs
+++ b/arch/src/aarch64/gicv3.rs
@@ -1,117 +1,128 @@
 // Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0

-use std::{boxed::Box, result};
+pub mod kvm {
+    use crate::aarch64::gic::kvm::KvmGICDevice;
+    use crate::aarch64::gic::{Error, GICDevice};
+    use crate::layout;
+    use hypervisor::kvm::kvm_bindings;
+    use std::sync::Arc;
+    use std::{boxed::Box, result};
+    type Result<T> = result::Result<T, Error>;

-use kvm_ioctls::DeviceFd;
+    pub struct KvmGICv3 {
+        /// The hypervisor agnostic device
+        device: Arc<dyn hypervisor::Device>,

-use super::gic::{Error, GICDevice};
+        /// GIC device properties, to be used for setting up the fdt entry
+        properties: [u64; 4],

-type Result<T> = result::Result<T, Error>;
-
-pub struct GICv3 {
-    /// The file descriptor for the KVM device
-    fd: DeviceFd,
-
-    /// GIC device properties, to be used for setting up the fdt entry
-    properties: [u64; 4],
-
-    /// Number of CPUs handled by the device
-    vcpu_count: u64,
-}
-
-impl GICv3 {
-    // Unfortunately bindgen omits defines that are based on other defines.
-    // See arch/arm64/include/uapi/asm/kvm.h file from the linux kernel.
-    const SZ_64K: u64 = 0x0001_0000;
-    const KVM_VGIC_V3_DIST_SIZE: u64 = GICv3::SZ_64K;
-    const KVM_VGIC_V3_REDIST_SIZE: u64 = (2 * GICv3::SZ_64K);
-
-    // Device trees specific constants
-    const ARCH_GIC_V3_MAINT_IRQ: u32 = 9;
-
-    /// Get the address of the GIC distributor.
-    fn get_dist_addr() -> u64 {
-        super::layout::MAPPED_IO_START - GICv3::KVM_VGIC_V3_DIST_SIZE
+        /// Number of CPUs handled by the device
+        vcpu_count: u64,
    }

-    /// Get the size of the GIC distributor.
-    fn get_dist_size() -> u64 {
-        GICv3::KVM_VGIC_V3_DIST_SIZE
+    impl KvmGICv3 {
+        // Unfortunately bindgen omits defines that are based on other defines.
+        // See arch/arm64/include/uapi/asm/kvm.h file from the linux kernel.
+        pub const SZ_64K: u64 = 0x0001_0000;
+        const KVM_VGIC_V3_DIST_SIZE: u64 = KvmGICv3::SZ_64K;
+        const KVM_VGIC_V3_REDIST_SIZE: u64 = (2 * KvmGICv3::SZ_64K);
+
+        // Device trees specific constants
+        pub const ARCH_GIC_V3_MAINT_IRQ: u32 = 9;
+
+        /// Get the address of the GIC distributor.
+        pub fn get_dist_addr() -> u64 {
+            layout::MAPPED_IO_START - KvmGICv3::KVM_VGIC_V3_DIST_SIZE
+        }
+
+        /// Get the size of the GIC distributor.
+        pub fn get_dist_size() -> u64 {
+            KvmGICv3::KVM_VGIC_V3_DIST_SIZE
+        }
+
+        /// Get the address of the GIC redistributors.
+        pub fn get_redists_addr(vcpu_count: u64) -> u64 {
+            KvmGICv3::get_dist_addr() - KvmGICv3::get_redists_size(vcpu_count)
+        }
+
+        /// Get the size of the GIC redistributors.
+        pub fn get_redists_size(vcpu_count: u64) -> u64 {
+            vcpu_count * KvmGICv3::KVM_VGIC_V3_REDIST_SIZE
+        }
    }

-    /// Get the address of the GIC redistributors.
-    fn get_redists_addr(vcpu_count: u64) -> u64 {
-        GICv3::get_dist_addr() - GICv3::get_redists_size(vcpu_count)
+    impl GICDevice for KvmGICv3 {
+        fn device(&self) -> &Arc<dyn hypervisor::Device> {
+            &self.device
+        }
+
+        fn fdt_compatibility(&self) -> &str {
+            "arm,gic-v3"
+        }
+
+        fn fdt_maint_irq(&self) -> u32 {
+            KvmGICv3::ARCH_GIC_V3_MAINT_IRQ
+        }
+
+        fn device_properties(&self) -> &[u64] {
+            &self.properties
+        }
+
+        fn vcpu_count(&self) -> u64 {
+            self.vcpu_count
+        }
    }

-    /// Get the size of the GIC redistributors.
-    fn get_redists_size(vcpu_count: u64) -> u64 {
-        vcpu_count * GICv3::KVM_VGIC_V3_REDIST_SIZE
-    }
-}
-
-impl GICDevice for GICv3 {
-    fn version() -> u32 {
-        kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_V3
-    }
-
-    fn device_fd(&self) -> &DeviceFd {
-        &self.fd
-    }
-
-    fn device_properties(&self) -> &[u64] {
-        &self.properties
-    }
-
-    fn vcpu_count(&self) -> u64 {
-        self.vcpu_count
-    }
-
-    fn fdt_compatibility(&self) -> &str {
-        "arm,gic-v3"
-    }
-
-    fn fdt_maint_irq(&self) -> u32 {
-        GICv3::ARCH_GIC_V3_MAINT_IRQ
-    }
-
-    fn create_device(fd: DeviceFd, vcpu_count: u64) -> Box<dyn GICDevice> {
-        Box::new(GICv3 {
-            fd: fd,
-            properties: [
-                GICv3::get_dist_addr(),
-                GICv3::get_dist_size(),
-                GICv3::get_redists_addr(vcpu_count),
-                GICv3::get_redists_size(vcpu_count),
-            ],
-            vcpu_count: vcpu_count,
-        })
-    }
-
-    fn init_device_attributes(gic_device: &Box<dyn GICDevice>) -> Result<()> {
-        /* Setting up the distributor attribute.
-         We are placing the GIC below 1GB so we need to substract the size of the distributor.
-        */
-        Self::set_device_attribute(
-            &gic_device.device_fd(),
-            kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
-            u64::from(kvm_bindings::KVM_VGIC_V3_ADDR_TYPE_DIST),
-            &GICv3::get_dist_addr() as *const u64 as u64,
-            0,
-        )?;
-
-        /* Setting up the redistributors' attribute.
-        We are calculating here the start of the redistributors address. We have one per CPU.
-        */
-        Self::set_device_attribute(
-            &gic_device.device_fd(),
-            kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
-            u64::from(kvm_bindings::KVM_VGIC_V3_ADDR_TYPE_REDIST),
-            &GICv3::get_redists_addr(u64::from(gic_device.vcpu_count())) as *const u64 as u64,
-            0,
-        )?;
-
-        Ok(())
+    impl KvmGICDevice for KvmGICv3 {
+        fn version() -> u32 {
+            kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_V3
+        }
+
+        fn create_device(
+            device: Arc<dyn hypervisor::Device>,
+            vcpu_count: u64,
+        ) -> Box<dyn GICDevice> {
+            Box::new(KvmGICv3 {
+                device: device,
+                properties: [
+                    KvmGICv3::get_dist_addr(),
+                    KvmGICv3::get_dist_size(),
+                    KvmGICv3::get_redists_addr(vcpu_count),
+                    KvmGICv3::get_redists_size(vcpu_count),
+                ],
+                vcpu_count: vcpu_count,
+            })
+        }
+
+        fn init_device_attributes(
+            _vm: &Arc<dyn hypervisor::Vm>,
+            gic_device: &Box<dyn GICDevice>,
+        ) -> Result<()> {
+            /* Setting up the distributor attribute.
+             We are placing the GIC below 1GB so we need to substract the size of the distributor.
+            */
+            Self::set_device_attribute(
+                gic_device.device(),
+                kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
+                u64::from(kvm_bindings::KVM_VGIC_V3_ADDR_TYPE_DIST),
+                &KvmGICv3::get_dist_addr() as *const u64 as u64,
+                0,
+            )?;
+
+            /* Setting up the redistributors' attribute.
+            We are calculating here the start of the redistributors address. We have one per CPU.
+            */
+            Self::set_device_attribute(
+                gic_device.device(),
+                kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
+                u64::from(kvm_bindings::KVM_VGIC_V3_ADDR_TYPE_REDIST),
+                &KvmGICv3::get_redists_addr(u64::from(gic_device.vcpu_count())) as *const u64
+                    as u64,
+                0,
+            )?;
+
+            Ok(())
+        }
    }
 }
--- a/arch/src/aarch64/gicv3_its.rs
+++ b/arch/src/aarch64/gicv3_its.rs
@@ -0,0 +1,133 @@
+// Copyright 2020 ARM Limited
+// SPDX-License-Identifier: Apache-2.0
+
+pub mod kvm {
+    use std::sync::Arc;
+    use std::{boxed::Box, result};
+    type Result<T> = result::Result<T, Error>;
+    use crate::aarch64::gic::kvm::KvmGICDevice;
+    use crate::aarch64::gic::{Error, GICDevice};
+    use crate::aarch64::gicv3::kvm::KvmGICv3;
+    use hypervisor::kvm::kvm_bindings;
+
+    pub struct KvmGICv3ITS {
+        /// The hypervisor agnostic device
+        device: Arc<dyn hypervisor::Device>,
+
+        /// GIC device properties, to be used for setting up the fdt entry
+        gic_properties: [u64; 4],
+
+        /// MSI device properties, to be used for setting up the fdt entry
+        msi_properties: [u64; 2],
+
+        /// Number of CPUs handled by the device
+        vcpu_count: u64,
+    }
+
+    impl KvmGICv3ITS {
+        const KVM_VGIC_V3_ITS_SIZE: u64 = (2 * KvmGICv3::SZ_64K);
+
+        fn get_msi_size() -> u64 {
+            KvmGICv3ITS::KVM_VGIC_V3_ITS_SIZE
+        }
+
+        fn get_msi_addr(vcpu_count: u64) -> u64 {
+            KvmGICv3::get_redists_addr(vcpu_count) - KvmGICv3ITS::get_msi_size()
+        }
+    }
+
+    impl GICDevice for KvmGICv3ITS {
+        fn device(&self) -> &Arc<dyn hypervisor::Device> {
+            &self.device
+        }
+
+        fn fdt_compatibility(&self) -> &str {
+            "arm,gic-v3"
+        }
+
+        fn msi_compatible(&self) -> bool {
+            true
+        }
+
+        fn msi_compatiblility(&self) -> &str {
+            "arm,gic-v3-its"
+        }
+
+        fn fdt_maint_irq(&self) -> u32 {
+            KvmGICv3::ARCH_GIC_V3_MAINT_IRQ
+        }
+
+        fn msi_properties(&self) -> &[u64] {
+            &self.msi_properties
+        }
+
+        fn device_properties(&self) -> &[u64] {
+            &self.gic_properties
+        }
+
+        fn vcpu_count(&self) -> u64 {
+            self.vcpu_count
+        }
+    }
+
+    impl KvmGICDevice for KvmGICv3ITS {
+        fn version() -> u32 {
+            KvmGICv3::version()
+        }
+
+        fn create_device(
+            device: Arc<dyn hypervisor::Device>,
+            vcpu_count: u64,
+        ) -> Box<dyn GICDevice> {
+            Box::new(KvmGICv3ITS {
+                device: device,
+                gic_properties: [
+                    KvmGICv3::get_dist_addr(),
+                    KvmGICv3::get_dist_size(),
+                    KvmGICv3::get_redists_addr(vcpu_count),
+                    KvmGICv3::get_redists_size(vcpu_count),
+                ],
+                msi_properties: [
+                    KvmGICv3ITS::get_msi_addr(vcpu_count),
+                    KvmGICv3ITS::get_msi_size(),
+                ],
+                vcpu_count: vcpu_count,
+            })
+        }
+
+        fn init_device_attributes(
+            vm: &Arc<dyn hypervisor::Vm>,
+            gic_device: &Box<dyn GICDevice>,
+        ) -> Result<()> {
+            KvmGICv3::init_device_attributes(vm, gic_device)?;
+
+            let mut its_device = kvm_bindings::kvm_create_device {
+                type_: kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_ITS,
+                fd: 0,
+                flags: 0,
+            };
+
+            let its_fd = vm
+                .create_device(&mut its_device)
+                .map_err(Error::CreateGIC)?;
+
+            Self::set_device_attribute(
+                &its_fd,
+                kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
+                u64::from(kvm_bindings::KVM_VGIC_ITS_ADDR_TYPE),
+                &KvmGICv3ITS::get_msi_addr(u64::from(gic_device.vcpu_count())) as *const u64 as u64,
+                0,
+            )?;
+
+            Self::set_device_attribute(
+                &its_fd,
+                kvm_bindings::KVM_DEV_ARM_VGIC_GRP_CTRL,
+                u64::from(kvm_bindings::KVM_DEV_ARM_VGIC_CTRL_INIT),
+                0,
+                0,
+            )?;
+
+            Ok(())
+        }
+    }
+}
--- a/arch/src/aarch64/mod.rs
+++ b/arch/src/aarch64/mod.rs
@@ -8,6 +8,7 @@ pub mod fdt;
 pub mod gic;
 mod gicv2;
 mod gicv3;
+mod gicv3_its;
 /// Layout for this aarch64 system.
 pub mod layout;
 /// Logic for configuring aarch64 registers.
@@ -16,10 +17,11 @@ pub mod regs;
 pub use self::fdt::DeviceInfoForFDT;
 use crate::DeviceType;
 use crate::RegionType;
-use kvm_ioctls::*;
+use hypervisor::kvm::kvm_bindings;
 use std::collections::HashMap;
 use std::ffi::CStr;
 use std::fmt::Debug;
+use std::sync::Arc;
 use vm_memory::{
    Address, GuestAddress, GuestAddressSpace, GuestMemory, GuestMemoryAtomic, GuestMemoryMmap,
    GuestUsize,
@@ -34,17 +36,17 @@ pub enum Error {
    /// Failed to create a GIC.
    SetupGIC(gic::Error),

-    /// Failed to compute the initrd address.
-    InitrdAddress,
+    /// Failed to compute the initramfs address.
+    InitramfsAddress,

    /// Error configuring the general purpose registers
    REGSConfiguration(regs::Error),

    /// Error fetching prefered target
-    VcpuArmPreferredTarget(kvm_ioctls::Error),
+    VcpuArmPreferredTarget(hypervisor::HypervisorVmError),

    /// Error doing Vcpu Init on Arm.
-    VcpuArmInit(kvm_ioctls::Error),
+    VcpuArmInit(hypervisor::HypervisorCpuError),
 }

 impl From<Error> for super::Error {
@@ -63,17 +65,16 @@ pub struct EntryPoint {

 /// Configure the specified VCPU, and return its MPIDR.
 pub fn configure_vcpu(
-    fd: &VcpuFd,
+    fd: &Arc<dyn hypervisor::Vcpu>,
    id: u8,
-    vm_fd: &VmFd,
+    vm: &Arc<dyn hypervisor::Vm>,
    kernel_entry_point: Option<EntryPoint>,
    vm_memory: &GuestMemoryAtomic<GuestMemoryMmap>,
 ) -> super::Result<u64> {
    let mut kvi: kvm_bindings::kvm_vcpu_init = kvm_bindings::kvm_vcpu_init::default();

    // This reads back the kernel's preferred target type.
-    vm_fd
-        .get_preferred_target(&mut kvi)
+    vm.get_preferred_target(&mut kvi)
        .map_err(Error::VcpuArmPreferredTarget)?;
    // We already checked that the capability is supported.
    kvi.features[0] |= 1 << kvm_bindings::KVM_ARM_VCPU_PSCI_0_2;
@@ -135,32 +136,56 @@ pub fn arch_memory_regions(size: GuestUsize) -> Vec<(GuestAddress, usize, Region
 ///
 /// * `guest_mem` - The memory to be used by the guest.
 /// * `num_cpus` - Number of virtual CPUs the guest will have.
-#[allow(clippy::too_many_arguments)]
-#[allow(unused_variables)]
 pub fn configure_system<T: DeviceInfoForFDT + Clone + Debug>(
-    vm_fd: &VmFd,
+    vm: &Arc<dyn hypervisor::Vm>,
    guest_mem: &GuestMemoryMmap,
    cmdline_cstring: &CStr,
    vcpu_count: u64,
    vcpu_mpidr: Vec<u64>,
    device_info: &HashMap<(DeviceType, String), T>,
    initrd: &Option<super::InitramfsConfig>,
+    pci_space_address: &Option<(u64, u64)>,
 ) -> super::Result<()> {
-    let gic_device = gic::create_gic(vm_fd, vcpu_count).map_err(Error::SetupGIC)?;
+    // If pci_space_address is present, it means PCI devices are used ("pci" feature enabled).
+    // Then GITv3-ITS is required for MSI messaging.
+    // Otherwise ("mmio" feature enabled), any version of GIC is OK.
+    let gic_device = gic::kvm::create_gic(vm, vcpu_count, pci_space_address.is_some())
+        .map_err(Error::SetupGIC)?;

-    let dtb = fdt::create_fdt(
+    fdt::create_fdt(
        guest_mem,
        cmdline_cstring,
        vcpu_mpidr,
        device_info,
        &gic_device,
        initrd,
+        pci_space_address,
    )
    .map_err(Error::SetupFDT)?;

    Ok(())
 }

+/// Returns the memory address where the initramfs could be loaded.
+pub fn initramfs_load_addr(
+    guest_mem: &GuestMemoryMmap,
+    initramfs_size: usize,
+) -> super::Result<u64> {
+    let round_to_pagesize = |size| (size + (super::PAGE_SIZE - 1)) & !(super::PAGE_SIZE - 1);
+    match GuestAddress(get_fdt_addr(&guest_mem))
+        .checked_sub(round_to_pagesize(initramfs_size) as u64)
+    {
+        Some(offset) => {
+            if guest_mem.address_in_range(offset) {
+                Ok(offset.raw_value())
+            } else {
+                Err(super::Error::AArch64Setup(Error::InitramfsAddress))
+            }
+        }
+        None => Err(super::Error::AArch64Setup(Error::InitramfsAddress)),
+    }
+}
+
 /// Returns the memory address where the kernel could be loaded.
 pub fn get_kernel_start() -> u64 {
    layout::RAM_64BIT_START
@@ -200,13 +225,6 @@ pub fn get_host_cpu_phys_bits() -> u8 {
    40
 }

-pub fn check_required_kvm_extensions(kvm: &Kvm) -> super::Result<()> {
-    if !kvm.check_extension(Cap::SignalMsi) {
-        return Err(super::Error::CapabilityMissing(Cap::SignalMsi));
-    }
-    Ok(())
-}
-
 #[cfg(test)]
 mod tests {
    use super::*;
--- a/arch/src/aarch64/regs.rs
+++ b/arch/src/aarch64/regs.rs
@@ -5,27 +5,25 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the THIRD-PARTY file.

-use std::{mem, result};
-
 use super::get_fdt_addr;
-use kvm_bindings::{
+use hypervisor::kvm::kvm_bindings::{
    user_pt_regs, KVM_REG_ARM64, KVM_REG_ARM64_SYSREG, KVM_REG_ARM64_SYSREG_CRM_MASK,
    KVM_REG_ARM64_SYSREG_CRM_SHIFT, KVM_REG_ARM64_SYSREG_CRN_MASK, KVM_REG_ARM64_SYSREG_CRN_SHIFT,
    KVM_REG_ARM64_SYSREG_OP0_MASK, KVM_REG_ARM64_SYSREG_OP0_SHIFT, KVM_REG_ARM64_SYSREG_OP1_MASK,
    KVM_REG_ARM64_SYSREG_OP1_SHIFT, KVM_REG_ARM64_SYSREG_OP2_MASK, KVM_REG_ARM64_SYSREG_OP2_SHIFT,
    KVM_REG_ARM_CORE, KVM_REG_SIZE_U64,
 };
-use kvm_ioctls::VcpuFd;
-
+use std::sync::Arc;
+use std::{mem, result};
 use vm_memory::GuestMemoryMmap;

 /// Errors thrown while setting aarch64 registers.
 #[derive(Debug)]
 pub enum Error {
    /// Failed to set core register (PC, PSTATE or general purpose ones).
-    SetCoreRegister(kvm_ioctls::Error),
+    SetCoreRegister(hypervisor::HypervisorCpuError),
    /// Failed to get a system register.
-    GetSysRegister(kvm_ioctls::Error),
+    GetSysRegister(hypervisor::HypervisorCpuError),
 }
 type Result<T> = result::Result<T, Error>;

@@ -122,7 +120,12 @@ arm64_sys_reg!(MPIDR_EL1, 3, 0, 0, 0, 5);
 /// * `cpu_id` - Index of current vcpu.
 /// * `boot_ip` - Starting instruction pointer.
 /// * `mem` - Reserved DRAM for current VM.
-pub fn setup_regs(vcpu: &VcpuFd, cpu_id: u8, boot_ip: u64, mem: &GuestMemoryMmap) -> Result<()> {
+pub fn setup_regs(
+    vcpu: &Arc<dyn hypervisor::Vcpu>,
+    cpu_id: u8,
+    boot_ip: u64,
+    mem: &GuestMemoryMmap,
+) -> Result<()> {
    // Get the register index of the PSTATE (Processor State) register.
    vcpu.set_one_reg(arm64_core_reg!(pstate), PSTATE_FAULT_BITS_64)
        .map_err(Error::SetCoreRegister)?;
@@ -148,51 +151,6 @@ pub fn setup_regs(vcpu: &VcpuFd, cpu_id: u8, boot_ip: u64, mem: &GuestMemoryMmap
 /// # Arguments
 ///
 /// * `vcpu` - Structure for the VCPU that holds the VCPU's fd.
-pub fn read_mpidr(vcpu: &VcpuFd) -> Result<u64> {
+pub fn read_mpidr(vcpu: &Arc<dyn hypervisor::Vcpu>) -> Result<u64> {
    vcpu.get_one_reg(MPIDR_EL1).map_err(Error::GetSysRegister)
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::aarch64::layout;
-    use kvm_ioctls::Kvm;
-    use vm_memory::{GuestAddress, GuestMemoryMmap};
-
-    #[test]
-    fn test_setup_regs() {
-        let kvm = Kvm::new().unwrap();
-        let vm = kvm.create_vm().unwrap();
-        let vcpu = vm.create_vcpu(0).unwrap();
-        let mut regions = Vec::new();
-        regions.push((
-            GuestAddress(layout::RAM_64BIT_START),
-            (layout::FDT_MAX_SIZE + 0x1000) as usize,
-        ));
-        let mem = GuestMemoryMmap::from_ranges(&regions).expect("Cannot initialize memory");
-
-        match setup_regs(&vcpu, 0, 0x0, &mem).unwrap_err() {
-            Error::SetCoreRegister(ref e) => assert_eq!(e.errno(), libc::ENOEXEC),
-            _ => panic!("Expected to receive Error::SetCoreRegister"),
-        }
-        let mut kvi: kvm_bindings::kvm_vcpu_init = kvm_bindings::kvm_vcpu_init::default();
-        vm.get_preferred_target(&mut kvi).unwrap();
-        vcpu.vcpu_init(&kvi).unwrap();
-
-        assert!(setup_regs(&vcpu, 0, 0x0, &mem).is_ok());
-    }
-    #[test]
-    fn test_read_mpidr() {
-        let kvm = Kvm::new().unwrap();
-        let vm = kvm.create_vm().unwrap();
-        let vcpu = vm.create_vcpu(0).unwrap();
-        let mut kvi: kvm_bindings::kvm_vcpu_init = kvm_bindings::kvm_vcpu_init::default();
-        vm.get_preferred_target(&mut kvi).unwrap();
-
-        // Must fail when vcpu is not initialized yet.
-        assert!(read_mpidr(&vcpu).is_err());
-
-        vcpu.vcpu_init(&kvi).unwrap();
-        assert_eq!(read_mpidr(&vcpu).unwrap(), 0x80000000);
-    }
-}
--- a/arch/src/lib.rs
+++ b/arch/src/lib.rs
@@ -15,18 +15,16 @@
 )]

 extern crate byteorder;
-extern crate kvm_bindings;
-extern crate kvm_ioctls;
+extern crate hypervisor;
 extern crate libc;
-
-extern crate vm_memory;
-
+#[macro_use]
+extern crate log;
 #[cfg(feature = "acpi")]
 extern crate acpi_tables;
 extern crate arch_gen;
 extern crate linux_loader;
+extern crate vm_memory;

-use kvm_ioctls::*;
 use std::fmt;
 use std::result;

@@ -57,8 +55,6 @@ pub enum Error {
    ModlistSetup(vm_memory::GuestMemoryError),
    /// RSDP Beyond Guest Memory
    RSDPPastRamEnd,
-    /// Capability missing
-    CapabilityMissing(Cap),
 }

 /// Type for returning public functions outcome.
@@ -89,8 +85,8 @@ pub mod aarch64;

 #[cfg(target_arch = "aarch64")]
 pub use aarch64::{
-    arch_memory_regions, check_required_kvm_extensions, configure_system, configure_vcpu,
-    fdt::DeviceInfoForFDT, get_host_cpu_phys_bits, get_kernel_start, layout,
+    arch_memory_regions, configure_system, configure_vcpu, fdt::DeviceInfoForFDT,
+    get_host_cpu_phys_bits, get_kernel_start, initramfs_load_addr, layout,
    layout::CMDLINE_MAX_SIZE, layout::IRQ_BASE, layout::IRQ_MAX, EntryPoint,
 };

@@ -99,9 +95,9 @@ pub mod x86_64;

 #[cfg(target_arch = "x86_64")]
 pub use x86_64::{
-    arch_memory_regions, check_required_kvm_extensions, configure_system, configure_vcpu,
-    get_host_cpu_phys_bits, initramfs_load_addr, layout, layout::CMDLINE_MAX_SIZE,
-    layout::CMDLINE_START, regs, BootProtocol, CpuidPatch, CpuidReg, EntryPoint,
+    arch_memory_regions, configure_system, configure_vcpu, get_host_cpu_phys_bits,
+    initramfs_load_addr, layout, layout::CMDLINE_MAX_SIZE, layout::CMDLINE_START, regs,
+    BootProtocol, CpuidPatch, CpuidReg, EntryPoint,
 };

 /// Safe wrapper for `sysconf(_SC_PAGESIZE)`.
--- a/arch/src/x86_64/gdt.rs
+++ b/arch/src/x86_64/gdt.rs
@@ -8,8 +8,7 @@
 // found in the LICENSE-BSD-3-Clause file.

 // For GDT details see arch/x86/include/asm/segment.h
-
-use kvm_bindings::kvm_segment;
+use hypervisor::x86_64::SegmentRegister;

 /// Constructor for a conventional segment GDT (or LDT) entry. Derived from the kernel's segment.h.
 pub fn gdt_entry(flags: u16, base: u32, limit: u32) -> u64 {
@@ -88,14 +87,14 @@ fn get_type(entry: u64) -> u8 {
    ((entry & 0x00000F0000000000) >> 40) as u8
 }

-/// Automatically build the kvm struct for SET_SREGS from the kernel bit fields.
+/// Automatically build the struct for SET_SREGS from the kernel bit fields.
 ///
 /// # Arguments
 ///
 /// * `entry` - The gdt entry.
 /// * `table_index` - Index of the entry in the gdt table.
-pub fn kvm_segment_from_gdt(entry: u64, table_index: u8) -> kvm_segment {
-    kvm_segment {
+pub fn segment_from_gdt(entry: u64, table_index: u8) -> SegmentRegister {
+    SegmentRegister {
        base: get_base(entry),
        limit: get_limit(entry),
        selector: (table_index * 8) as u16,
@@ -122,7 +121,7 @@ mod tests {
    #[test]
    fn field_parse() {
        let gdt = gdt_entry(0xA09B, 0x100000, 0xfffff);
-        let seg = kvm_segment_from_gdt(gdt, 0);
+        let seg = segment_from_gdt(gdt, 0);
        // 0xA09B
        // 'A'
        assert_eq!(0x1, seg.g);
--- a/arch/src/x86_64/interrupts.rs
+++ b/arch/src/x86_64/interrupts.rs
@@ -8,27 +8,27 @@
 use std::io::Cursor;
 use std::mem;
 use std::result;
+use std::sync::Arc;

 use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};

-use kvm_bindings::kvm_lapic_state;
-use kvm_ioctls;
+use hypervisor::x86_64::LapicState;

 #[derive(Debug)]
 pub enum Error {
-    GetLapic(kvm_ioctls::Error),
-    SetLapic(kvm_ioctls::Error),
+    GetLapic(anyhow::Error),
+    SetLapic(anyhow::Error),
 }

-pub type Result<T> = result::Result<T, Error>;
+pub type Result<T> = result::Result<T, hypervisor::HypervisorCpuError>;

 // Defines poached from apicdef.h kernel header.
-const APIC_LVT0: usize = 0x350;
-const APIC_LVT1: usize = 0x360;
-const APIC_MODE_NMI: u32 = 0x4;
-const APIC_MODE_EXTINT: u32 = 0x7;
+pub const APIC_LVT0: usize = 0x350;
+pub const APIC_LVT1: usize = 0x360;
+pub const APIC_MODE_NMI: u32 = 0x4;
+pub const APIC_MODE_EXTINT: u32 = 0x7;

-fn get_klapic_reg(klapic: &kvm_lapic_state, reg_offset: usize) -> u32 {
+pub fn get_klapic_reg(klapic: &LapicState, reg_offset: usize) -> u32 {
    let sliceu8 = unsafe {
        // This array is only accessed as parts of a u32 word, so interpret it as a u8 array.
        // Cursors are only readable on arrays of u8, not i8(c_char).
@@ -41,7 +41,7 @@ fn get_klapic_reg(klapic: &kvm_lapic_state, reg_offset: usize) -> u32 {
        .expect("Failed to read klapic register")
 }

-fn set_klapic_reg(klapic: &mut kvm_lapic_state, reg_offset: usize, value: u32) {
+pub fn set_klapic_reg(klapic: &mut LapicState, reg_offset: usize, value: u32) {
    let sliceu8 = unsafe {
        // This array is only accessed as parts of a u32 word, so interpret it as a u8 array.
        // Cursors are only readable on arrays of u8, not i8(c_char).
@@ -54,7 +54,7 @@ fn set_klapic_reg(klapic: &mut kvm_lapic_state, reg_offset: usize, value: u32) {
        .expect("Failed to write klapic register")
 }

-fn set_apic_delivery_mode(reg: u32, mode: u32) -> u32 {
+pub fn set_apic_delivery_mode(reg: u32, mode: u32) -> u32 {
    ((reg) & !0x700) | ((mode) << 8)
 }

@@ -62,8 +62,8 @@ fn set_apic_delivery_mode(reg: u32, mode: u32) -> u32 {
 ///
 /// # Arguments
 /// * `vcpu` - The VCPU object to configure.
-pub fn set_lint(vcpu: &kvm_ioctls::VcpuFd) -> Result<()> {
-    let mut klapic = vcpu.get_lapic().map_err(Error::GetLapic)?;
+pub fn set_lint(vcpu: &Arc<dyn hypervisor::Vcpu>) -> Result<()> {
+    let mut klapic = vcpu.get_lapic()?;

    let lvt_lint0 = get_klapic_reg(&klapic, APIC_LVT0);
    set_klapic_reg(
@@ -78,24 +78,23 @@ pub fn set_lint(vcpu: &kvm_ioctls::VcpuFd) -> Result<()> {
        set_apic_delivery_mode(lvt_lint1, APIC_MODE_NMI),
    );

-    vcpu.set_lapic(&klapic).map_err(Error::SetLapic)
+    vcpu.set_lapic(&klapic)
 }

 #[cfg(test)]
 mod tests {
-    extern crate kvm_ioctls;
+
    extern crate rand;
    use self::rand::Rng;

    use super::*;
-    use kvm_ioctls::Kvm;

    const KVM_APIC_REG_SIZE: usize = 0x400;

    #[test]
    fn test_set_and_get_klapic_reg() {
        let reg_offset = 0x340;
-        let mut klapic = kvm_lapic_state::default();
+        let mut klapic = LapicState::default();
        set_klapic_reg(&mut klapic, reg_offset, 3);
        let value = get_klapic_reg(&klapic, reg_offset);
        assert_eq!(value, 3);
@@ -105,7 +104,7 @@ mod tests {
    #[should_panic]
    fn test_set_and_get_klapic_out_of_bounds() {
        let reg_offset = KVM_APIC_REG_SIZE + 10;
-        let mut klapic = kvm_lapic_state::default();
+        let mut klapic = LapicState::default();
        set_klapic_reg(&mut klapic, reg_offset, 3);
    }

@@ -119,40 +118,4 @@ mod tests {
        let after: Vec<u32> = v.iter().map(|x| ((*x & !0x700) | ((2) << 8))).collect();
        assert_eq!(v, after);
    }
-
-    #[test]
-    fn test_setlint() {
-        let kvm = kvm_ioctls::Kvm::new().unwrap();
-        assert!(kvm.check_extension(kvm_ioctls::Cap::Irqchip));
-        let vm = kvm.create_vm().unwrap();
-        //the get_lapic ioctl will fail if there is no irqchip created beforehand.
-        assert!(vm.create_irq_chip().is_ok());
-        let vcpu = vm.create_vcpu(0).unwrap();
-        let klapic_before: kvm_lapic_state = vcpu.get_lapic().unwrap();
-
-        // Compute the value that is expected to represent LVT0 and LVT1.
-        let lint0 = get_klapic_reg(&klapic_before, APIC_LVT0);
-        let lint1 = get_klapic_reg(&klapic_before, APIC_LVT1);
-        let lint0_mode_expected = set_apic_delivery_mode(lint0, APIC_MODE_EXTINT);
-        let lint1_mode_expected = set_apic_delivery_mode(lint1, APIC_MODE_NMI);
-
-        set_lint(&vcpu).unwrap();
-
-        // Compute the value that represents LVT0 and LVT1 after set_lint.
-        let klapic_actual: kvm_lapic_state = vcpu.get_lapic().unwrap();
-        let lint0_mode_actual = get_klapic_reg(&klapic_actual, APIC_LVT0);
-        let lint1_mode_actual = get_klapic_reg(&klapic_actual, APIC_LVT1);
-        assert_eq!(lint0_mode_expected, lint0_mode_actual);
-        assert_eq!(lint1_mode_expected, lint1_mode_actual);
-    }
-
-    #[test]
-    fn test_setlint_fails() {
-        let kvm = Kvm::new().unwrap();
-        let vm = kvm.create_vm().unwrap();
-        let vcpu = vm.create_vcpu(0).unwrap();
-        // 'get_lapic' ioctl triggered by the 'set_lint' function will fail if there is no
-        // irqchip created beforehand.
-        assert!(set_lint(&vcpu).is_err());
-    }
 }
--- a/arch/src/x86_64/layout.rs
+++ b/arch/src/x86_64/layout.rs
@@ -70,6 +70,8 @@ pub const EBDA_START: GuestAddress = GuestAddress(0xa0000);
 // ACPI RSDP table
 pub const RSDP_POINTER: GuestAddress = EBDA_START;

+pub const SMBIOS_START: u64 = 0xf0000; // First possible location per the spec.
+
 // == End of "EBDA" range ==

 // ** High RAM (start: 1MiB, length: 3071MiB) **
--- a/arch/src/x86_64/mod.rs
+++ b/arch/src/x86_64/mod.rs
@@ -6,7 +6,7 @@
 // Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
-
+use std::sync::Arc;
 mod gdt;
 pub mod interrupts;
 pub mod layout;
@@ -15,8 +15,7 @@ mod mptable;
 pub mod regs;
 use crate::InitramfsConfig;
 use crate::RegionType;
-use kvm_bindings::CpuId;
-use kvm_ioctls::*;
+use hypervisor::{CpuId, CpuIdEntry, CPUID_FLAG_VALID_INDEX};
 use linux_loader::loader::bootparam::{boot_params, setup_header};
 use linux_loader::loader::elf::start_info::{
    hvm_memmap_table_entry, hvm_modlist_entry, hvm_start_info,
@@ -26,6 +25,7 @@ use vm_memory::{
    Address, ByteValued, Bytes, GuestAddress, GuestAddressSpace, GuestMemory, GuestMemoryAtomic,
    GuestMemoryMmap, GuestMemoryRegion, GuestUsize,
 };
+mod smbios;

 #[derive(Debug, Copy, Clone)]
 pub enum BootProtocol {
@@ -58,6 +58,53 @@ pub struct EntryPoint {
 const E820_RAM: u32 = 1;
 const E820_RESERVED: u32 = 2;

+#[derive(Clone)]
+pub struct SgxEpcSection {
+    start: GuestAddress,
+    size: GuestUsize,
+}
+
+impl SgxEpcSection {
+    pub fn new(start: GuestAddress, size: GuestUsize) -> Self {
+        SgxEpcSection { start, size }
+    }
+    pub fn start(&self) -> GuestAddress {
+        self.start
+    }
+    pub fn size(&self) -> GuestUsize {
+        self.size
+    }
+}
+
+#[derive(Clone)]
+pub struct SgxEpcRegion {
+    start: GuestAddress,
+    size: GuestUsize,
+    epc_sections: Vec<SgxEpcSection>,
+}
+
+impl SgxEpcRegion {
+    pub fn new(start: GuestAddress, size: GuestUsize) -> Self {
+        SgxEpcRegion {
+            start,
+            size,
+            epc_sections: Vec::new(),
+        }
+    }
+    pub fn start(&self) -> GuestAddress {
+        self.start
+    }
+    pub fn size(&self) -> GuestUsize {
+        self.size
+    }
+    pub fn epc_sections(&self) -> &Vec<SgxEpcSection> {
+        &self.epc_sections
+    }
+    pub fn push(&mut self, epc_section: SgxEpcSection) {
+        self.epc_sections.push(epc_section);
+    }
+}
+
 // This is a workaround to the Rust enforcement specifying that any implementation of a foreign
 // trait (in this case `DataInit`) where:
 // *    the type that is implementing the trait is foreign or
@@ -110,11 +157,23 @@ pub enum Error {
    /// Error configuring the MSR registers
    MSRSConfiguration(regs::Error),

-    /// The call to KVM_SET_CPUID2 failed.
-    SetSupportedCpusFailed(kvm_ioctls::Error),
+    /// Failed to set supported CPUs.
+    SetSupportedCpusFailed(anyhow::Error),

    /// Cannot set the local interruption due to bad configuration.
-    LocalIntConfiguration(interrupts::Error),
+    LocalIntConfiguration(anyhow::Error),
+
+    /// Error setting up SMBIOS table
+    SmbiosSetup(smbios::Error),
+
+    /// Could not find any SGX EPC section
+    NoSgxEpcSection,
+
+    /// Missing SGX CPU feature
+    MissingSgxFeature,
+
+    /// Missing SGX_LC CPU feature
+    MissingSgxLaunchControlFeature,
 }

 impl From<Error> for super::Error {
@@ -152,8 +211,10 @@ impl CpuidPatch {
    ) {
        let entries = cpuid.as_mut_slice();

+        let mut entry_found = false;
        for entry in entries.iter_mut() {
            if entry.function == function && (index == None || index.unwrap() == entry.index) {
+                entry_found = true;
                match reg {
                    CpuidReg::EAX => {
                        entry.eax = value;
@@ -170,6 +231,38 @@ impl CpuidPatch {
                }
            }
        }
+
+        if entry_found {
+            return;
+        }
+
+        // Entry not found, so let's add it.
+        if let Some(index) = index {
+            let mut entry = CpuIdEntry {
+                function,
+                index,
+                flags: CPUID_FLAG_VALID_INDEX,
+                ..Default::default()
+            };
+            match reg {
+                CpuidReg::EAX => {
+                    entry.eax = value;
+                }
+                CpuidReg::EBX => {
+                    entry.ebx = value;
+                }
+                CpuidReg::ECX => {
+                    entry.ecx = value;
+                }
+                CpuidReg::EDX => {
+                    entry.edx = value;
+                }
+            }
+
+            if let Err(e) = cpuid.push(entry) {
+                error!("Failed adding new CPUID entry: {:?}", e);
+            }
+        }
    }

    pub fn patch_cpuid(cpuid: &mut CpuId, patches: Vec<CpuidPatch>) {
@@ -197,10 +290,45 @@ impl CpuidPatch {
            }
        }
    }
+
+    pub fn is_feature_enabled(
+        cpuid: &CpuId,
+        function: u32,
+        index: u32,
+        reg: CpuidReg,
+        feature_bit: usize,
+    ) -> bool {
+        let entries = cpuid.as_slice();
+        let mask = 1 << feature_bit;
+
+        for entry in entries.iter() {
+            if entry.function == function && entry.index == index {
+                let reg_val: u32;
+                match reg {
+                    CpuidReg::EAX => {
+                        reg_val = entry.eax;
+                    }
+                    CpuidReg::EBX => {
+                        reg_val = entry.ebx;
+                    }
+                    CpuidReg::ECX => {
+                        reg_val = entry.ecx;
+                    }
+                    CpuidReg::EDX => {
+                        reg_val = entry.edx;
+                    }
+                }
+
+                return (reg_val & mask) == mask;
+            }
+        }
+
+        false
+    }
 }

 pub fn configure_vcpu(
-    fd: &VcpuFd,
+    fd: &Arc<dyn hypervisor::Vcpu>,
    id: u8,
    kernel_entry_point: Option<EntryPoint>,
    vm_memory: &GuestMemoryAtomic<GuestMemoryMmap>,
@@ -208,8 +336,9 @@ pub fn configure_vcpu(
 ) -> super::Result<()> {
    let mut cpuid = cpuid;
    CpuidPatch::set_cpuid_reg(&mut cpuid, 0xb, None, CpuidReg::EDX, u32::from(id));
+    CpuidPatch::set_cpuid_reg(&mut cpuid, 0x1f, None, CpuidReg::EDX, u32::from(id));
    fd.set_cpuid2(&cpuid)
-        .map_err(Error::SetSupportedCpusFailed)?;
+        .map_err(|e| Error::SetSupportedCpusFailed(e.into()))?;

    regs::setup_msrs(fd).map_err(Error::MSRSConfiguration)?;
    if let Some(kernel_entry_point) = kernel_entry_point {
@@ -226,7 +355,7 @@ pub fn configure_vcpu(
        regs::setup_sregs(&vm_memory.memory(), fd, kernel_entry_point.protocol)
            .map_err(Error::SREGSConfiguration)?;
    }
-    interrupts::set_lint(fd).map_err(Error::LocalIntConfiguration)?;
+    interrupts::set_lint(fd).map_err(|e| Error::LocalIntConfiguration(e.into()))?;
    Ok(())
 }

@@ -295,7 +424,10 @@ pub fn configure_system(
    setup_hdr: Option<setup_header>,
    rsdp_addr: Option<GuestAddress>,
    boot_prot: BootProtocol,
+    sgx_epc_region: Option<SgxEpcRegion>,
 ) -> super::Result<()> {
+    smbios::setup_smbios(guest_mem).map_err(Error::SmbiosSetup)?;
+
    // Note that this puts the mptable at the last 1k of Linux's 640k base RAM
    #[cfg(not(feature = "acpi"))]
    mptable::setup_mptable(guest_mem, _num_cpus).map_err(Error::MpTableSetup)?;
@@ -309,7 +441,13 @@ pub fn configure_system(

    match boot_prot {
        BootProtocol::PvhBoot => {
-            configure_pvh(guest_mem, cmdline_addr, initramfs, rsdp_addr)?;
+            configure_pvh(
+                guest_mem,
+                cmdline_addr,
+                initramfs,
+                rsdp_addr,
+                sgx_epc_region,
+            )?;
        }
        BootProtocol::LinuxBoot => {
            configure_64bit_boot(
@@ -319,6 +457,7 @@ pub fn configure_system(
                initramfs,
                setup_hdr,
                rsdp_addr,
+                sgx_epc_region,
            )?;
        }
    }
@@ -331,6 +470,7 @@ fn configure_pvh(
    cmdline_addr: GuestAddress,
    initramfs: &Option<InitramfsConfig>,
    rsdp_addr: Option<GuestAddress>,
+    sgx_epc_region: Option<SgxEpcRegion>,
 ) -> super::Result<()> {
    const XEN_HVM_START_MAGIC_VALUE: u32 = 0x336ec578;

@@ -404,6 +544,15 @@ fn configure_pvh(
        E820_RESERVED,
    )?;

+    if let Some(sgx_epc_region) = sgx_epc_region {
+        add_memmap_entry(
+            &mut memmap,
+            sgx_epc_region.start().raw_value(),
+            sgx_epc_region.size() as u64,
+            E820_RESERVED,
+        )?;
+    }
+
    start_info.0.memmap_entries = memmap.len() as u32;

    // Copy the vector with the memmap table to the MEMMAP_START address
@@ -470,6 +619,7 @@ fn configure_64bit_boot(
    initramfs: &Option<InitramfsConfig>,
    setup_hdr: Option<setup_header>,
    rsdp_addr: Option<GuestAddress>,
+    sgx_epc_region: Option<SgxEpcRegion>,
 ) -> super::Result<()> {
    const KERNEL_BOOT_FLAG_MAGIC: u16 = 0xaa55;
    const KERNEL_HDR_MAGIC: u32 = 0x53726448;
@@ -533,6 +683,15 @@ fn configure_64bit_boot(
        E820_RESERVED,
    )?;

+    if let Some(sgx_epc_region) = sgx_epc_region {
+        add_e820_entry(
+            &mut params.0,
+            sgx_epc_region.start().raw_value(),
+            sgx_epc_region.size() as u64,
+            E820_RESERVED,
+        )?;
+    }
+
    if let Some(rsdp_addr) = rsdp_addr {
        params.0.acpi_rsdp_addr = rsdp_addr.0;
    }
@@ -615,16 +774,112 @@ pub fn get_host_cpu_phys_bits() -> u8 {
    }
 }

-pub fn check_required_kvm_extensions(kvm: &Kvm) -> super::Result<()> {
-    if !kvm.check_extension(Cap::SignalMsi) {
-        return Err(super::Error::CapabilityMissing(Cap::SignalMsi));
+pub fn update_cpuid_topology(
+    cpuid: &mut CpuId,
+    threads_per_core: u8,
+    cores_per_die: u8,
+    dies_per_package: u8,
+) {
+    let thread_width = 8 - (threads_per_core - 1).leading_zeros();
+    let core_width = (8 - (cores_per_die - 1).leading_zeros()) + thread_width;
+    let die_width = (8 - (dies_per_package - 1).leading_zeros()) + core_width;
+
+    // CPU Topology leaf 0xb
+    CpuidPatch::set_cpuid_reg(cpuid, 0xb, Some(0), CpuidReg::EAX, thread_width);
+    CpuidPatch::set_cpuid_reg(
+        cpuid,
+        0xb,
+        Some(0),
+        CpuidReg::EBX,
+        u32::from(threads_per_core),
+    );
+    CpuidPatch::set_cpuid_reg(cpuid, 0xb, Some(0), CpuidReg::ECX, 1 << 8);
+
+    CpuidPatch::set_cpuid_reg(cpuid, 0xb, Some(1), CpuidReg::EAX, die_width);
+    CpuidPatch::set_cpuid_reg(
+        cpuid,
+        0xb,
+        Some(1),
+        CpuidReg::EBX,
+        u32::from(dies_per_package * cores_per_die * threads_per_core),
+    );
+    CpuidPatch::set_cpuid_reg(cpuid, 0xb, Some(1), CpuidReg::ECX, 2 << 8);
+
+    // CPU Topology leaf 0x1f
+    CpuidPatch::set_cpuid_reg(cpuid, 0x1f, Some(0), CpuidReg::EAX, thread_width);
+    CpuidPatch::set_cpuid_reg(
+        cpuid,
+        0x1f,
+        Some(0),
+        CpuidReg::EBX,
+        u32::from(threads_per_core),
+    );
+    CpuidPatch::set_cpuid_reg(cpuid, 0x1f, Some(0), CpuidReg::ECX, 1 << 8);
+
+    CpuidPatch::set_cpuid_reg(cpuid, 0x1f, Some(1), CpuidReg::EAX, core_width);
+    CpuidPatch::set_cpuid_reg(
+        cpuid,
+        0x1f,
+        Some(1),
+        CpuidReg::EBX,
+        u32::from(cores_per_die * threads_per_core),
+    );
+    CpuidPatch::set_cpuid_reg(cpuid, 0x1f, Some(1), CpuidReg::ECX, 2 << 8);
+
+    CpuidPatch::set_cpuid_reg(cpuid, 0x1f, Some(2), CpuidReg::EAX, die_width);
+    CpuidPatch::set_cpuid_reg(
+        cpuid,
+        0x1f,
+        Some(2),
+        CpuidReg::EBX,
+        u32::from(dies_per_package * cores_per_die * threads_per_core),
+    );
+    CpuidPatch::set_cpuid_reg(cpuid, 0x1f, Some(2), CpuidReg::ECX, 5 << 8);
+}
+
+// The goal is to update the CPUID sub-leaves to reflect the number of EPC
+// sections exposed to the guest.
+pub fn update_cpuid_sgx(cpuid: &mut CpuId, epc_sections: Vec<SgxEpcSection>) -> Result<(), Error> {
+    // Something's wrong if there's no EPC section.
+    if epc_sections.is_empty() {
+        return Err(Error::NoSgxEpcSection);
    }
-    if !kvm.check_extension(Cap::TscDeadlineTimer) {
-        return Err(super::Error::CapabilityMissing(Cap::TscDeadlineTimer));
+    // We can't go further if the hypervisor does not support SGX feature.
+    if !CpuidPatch::is_feature_enabled(cpuid, 0x7, 0, CpuidReg::EBX, 2) {
+        return Err(Error::MissingSgxFeature);
    }
-    if !kvm.check_extension(Cap::SplitIrqchip) {
-        return Err(super::Error::CapabilityMissing(Cap::SplitIrqchip));
+    // We can't go further if the hypervisor does not support SGX_LC feature.
+    if !CpuidPatch::is_feature_enabled(cpuid, 0x7, 0, CpuidReg::ECX, 30) {
+        return Err(Error::MissingSgxLaunchControlFeature);
    }
+
+    // Get host CPUID for leaf 0x12, subleaf 0x2. This is to retrieve EPC
+    // properties such as confidentiality and integrity.
+    let leaf = unsafe { std::arch::x86_64::__cpuid_count(0x12, 0x2) };
+
+    for (i, epc_section) in epc_sections.iter().enumerate() {
+        let subleaf_idx = i + 2;
+        let start = epc_section.start().raw_value();
+        let size = epc_section.size() as u64;
+        let eax = (start & 0xffff_f000) as u32 | 0x1;
+        let ebx = (start >> 32) as u32;
+        let ecx = (size & 0xffff_f000) as u32 | (leaf.ecx & 0xf);
+        let edx = (size >> 32) as u32;
+        // CPU Topology leaf 0x12
+        CpuidPatch::set_cpuid_reg(cpuid, 0x12, Some(subleaf_idx as u32), CpuidReg::EAX, eax);
+        CpuidPatch::set_cpuid_reg(cpuid, 0x12, Some(subleaf_idx as u32), CpuidReg::EBX, ebx);
+        CpuidPatch::set_cpuid_reg(cpuid, 0x12, Some(subleaf_idx as u32), CpuidReg::ECX, ecx);
+        CpuidPatch::set_cpuid_reg(cpuid, 0x12, Some(subleaf_idx as u32), CpuidReg::EDX, edx);
+    }
+
+    // Add one NULL entry to terminate the dynamic list
+    let subleaf_idx = epc_sections.len() + 2;
+    // CPU Topology leaf 0x12
+    CpuidPatch::set_cpuid_reg(cpuid, 0x12, Some(subleaf_idx as u32), CpuidReg::EAX, 0);
+    CpuidPatch::set_cpuid_reg(cpuid, 0x12, Some(subleaf_idx as u32), CpuidReg::EBX, 0);
+    CpuidPatch::set_cpuid_reg(cpuid, 0x12, Some(subleaf_idx as u32), CpuidReg::ECX, 0);
+    CpuidPatch::set_cpuid_reg(cpuid, 0x12, Some(subleaf_idx as u32), CpuidReg::EDX, 0);
+
    Ok(())
 }

@@ -662,6 +917,7 @@ mod tests {
            None,
            Some(layout::RSDP_POINTER),
            BootProtocol::LinuxBoot,
+            None,
        );
        assert!(config_err.is_err());

@@ -683,6 +939,7 @@ mod tests {
            None,
            None,
            BootProtocol::LinuxBoot,
+            None,
        )
        .unwrap();

@@ -695,6 +952,7 @@ mod tests {
            None,
            None,
            BootProtocol::PvhBoot,
+            None,
        )
        .unwrap();

@@ -716,6 +974,7 @@ mod tests {
            None,
            None,
            BootProtocol::LinuxBoot,
+            None,
        )
        .unwrap();

@@ -728,6 +987,7 @@ mod tests {
            None,
            None,
            BootProtocol::PvhBoot,
+            None,
        )
        .unwrap();

@@ -749,6 +1009,7 @@ mod tests {
            None,
            None,
            BootProtocol::LinuxBoot,
+            None,
        )
        .unwrap();

@@ -761,6 +1022,7 @@ mod tests {
            None,
            None,
            BootProtocol::PvhBoot,
+            None,
        )
        .unwrap();
    }
--- a/arch/src/x86_64/regs.rs
+++ b/arch/src/x86_64/regs.rs
@@ -6,35 +6,29 @@
 // Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
-
+use std::sync::Arc;
 use std::{mem, result};

-use super::gdt::{gdt_entry, kvm_segment_from_gdt};
+use super::gdt::{gdt_entry, segment_from_gdt};
 use super::BootProtocol;
-use arch_gen::x86::msr_index;
-use kvm_bindings::{kvm_fpu, kvm_msr_entry, kvm_regs, kvm_sregs, Msrs};
-use kvm_ioctls::VcpuFd;
+use hypervisor::x86_64::{FpuState, SpecialRegisters, StandardRegisters};
 use layout::{
    BOOT_GDT_START, BOOT_IDT_START, PDE_START, PDPTE_START, PML4_START, PML5_START, PVH_INFO_START,
 };
 use vm_memory::{Address, Bytes, GuestMemory, GuestMemoryError, GuestMemoryMmap};

-// MTRR constants
-const MTRR_ENABLE: u64 = 0x800; // IA32_MTRR_DEF_TYPE MSR: E (MTRRs enabled) flag, bit 11
-const MTRR_MEM_TYPE_WB: u64 = 0x6;
-
 #[derive(Debug)]
 pub enum Error {
    /// Failed to get SREGs for this CPU.
-    GetStatusRegisters(kvm_ioctls::Error),
+    GetStatusRegisters(hypervisor::HypervisorCpuError),
    /// Failed to set base registers for this CPU.
-    SetBaseRegisters(kvm_ioctls::Error),
+    SetBaseRegisters(hypervisor::HypervisorCpuError),
    /// Failed to configure the FPU.
-    SetFPURegisters(kvm_ioctls::Error),
+    SetFPURegisters(hypervisor::HypervisorCpuError),
    /// Setting up MSRs failed.
-    SetModelSpecificRegisters(kvm_ioctls::Error),
+    SetModelSpecificRegisters(hypervisor::HypervisorCpuError),
    /// Failed to set SREGs for this CPU.
-    SetStatusRegisters(kvm_ioctls::Error),
+    SetStatusRegisters(hypervisor::HypervisorCpuError),
    /// Checking the GDT address failed.
    CheckGDTAddr,
    /// Writing the GDT to RAM failed.
@@ -58,8 +52,8 @@ pub type Result<T> = result::Result<T, Error>;
 /// # Arguments
 ///
 /// * `vcpu` - Structure for the VCPU that holds the VCPU's fd.
-pub fn setup_fpu(vcpu: &VcpuFd) -> Result<()> {
-    let fpu: kvm_fpu = kvm_fpu {
+pub fn setup_fpu(vcpu: &Arc<dyn hypervisor::Vcpu>) -> Result<()> {
+    let fpu: FpuState = FpuState {
        fcw: 0x37f,
        mxcsr: 0x1f80,
        ..Default::default()
@@ -73,8 +67,8 @@ pub fn setup_fpu(vcpu: &VcpuFd) -> Result<()> {
 /// # Arguments
 ///
 /// * `vcpu` - Structure for the VCPU that holds the VCPU's fd.
-pub fn setup_msrs(vcpu: &VcpuFd) -> Result<()> {
-    vcpu.set_msrs(&boot_msr_entries())
+pub fn setup_msrs(vcpu: &Arc<dyn hypervisor::Vcpu>) -> Result<()> {
+    vcpu.set_msrs(&hypervisor::x86_64::boot_msr_entries())
        .map_err(Error::SetModelSpecificRegisters)?;

    Ok(())
@@ -89,22 +83,22 @@ pub fn setup_msrs(vcpu: &VcpuFd) -> Result<()> {
 /// * `boot_sp` - Starting stack pointer.
 /// * `boot_si` - Must point to zero page address per Linux ABI.
 pub fn setup_regs(
-    vcpu: &VcpuFd,
+    vcpu: &Arc<dyn hypervisor::Vcpu>,
    boot_ip: u64,
    boot_sp: u64,
    boot_si: u64,
    boot_prot: BootProtocol,
 ) -> Result<()> {
-    let regs: kvm_regs = match boot_prot {
+    let regs: StandardRegisters = match boot_prot {
        // Configure regs as required by PVH boot protocol.
-        BootProtocol::PvhBoot => kvm_regs {
+        BootProtocol::PvhBoot => StandardRegisters {
            rflags: 0x0000000000000002u64,
            rbx: PVH_INFO_START.raw_value(),
            rip: boot_ip,
            ..Default::default()
        },
        // Configure regs as required by Linux 64-bit boot protocol.
-        BootProtocol::LinuxBoot => kvm_regs {
+        BootProtocol::LinuxBoot => StandardRegisters {
            rflags: 0x0000000000000002u64,
            rip: boot_ip,
            rsp: boot_sp,
@@ -122,8 +116,12 @@ pub fn setup_regs(
 ///
 /// * `mem` - The memory that will be passed to the guest.
 /// * `vcpu` - Structure for the VCPU that holds the VCPU's fd.
-pub fn setup_sregs(mem: &GuestMemoryMmap, vcpu: &VcpuFd, boot_prot: BootProtocol) -> Result<()> {
-    let mut sregs: kvm_sregs = vcpu.get_sregs().map_err(Error::GetStatusRegisters)?;
+pub fn setup_sregs(
+    mem: &GuestMemoryMmap,
+    vcpu: &Arc<dyn hypervisor::Vcpu>,
+    boot_prot: BootProtocol,
+) -> Result<()> {
+    let mut sregs: SpecialRegisters = vcpu.get_sregs().map_err(Error::GetStatusRegisters)?;

    configure_segments_and_sregs(mem, &mut sregs, boot_prot)?;

@@ -162,9 +160,9 @@ fn write_idt_value(val: u64, guest_mem: &GuestMemoryMmap) -> Result<()> {
        .map_err(Error::WriteIDT)
 }

-fn configure_segments_and_sregs(
+pub fn configure_segments_and_sregs(
    mem: &GuestMemoryMmap,
-    sregs: &mut kvm_sregs,
+    sregs: &mut SpecialRegisters,
    boot_prot: BootProtocol,
 ) -> Result<()> {
    let gdt_table: [u64; BOOT_GDT_MAX as usize] = match boot_prot {
@@ -188,9 +186,9 @@ fn configure_segments_and_sregs(
        }
    };

-    let code_seg = kvm_segment_from_gdt(gdt_table[1], 1);
-    let data_seg = kvm_segment_from_gdt(gdt_table[2], 2);
-    let tss_seg = kvm_segment_from_gdt(gdt_table[3], 3);
+    let code_seg = segment_from_gdt(gdt_table[1], 1);
+    let data_seg = segment_from_gdt(gdt_table[2], 2);
+    let tss_seg = segment_from_gdt(gdt_table[3], 3);

    // Write segments
    write_gdt_table(&gdt_table[..], mem)?;
@@ -224,9 +222,8 @@ fn configure_segments_and_sregs(
    Ok(())
 }

-fn setup_page_tables(mem: &GuestMemoryMmap, sregs: &mut kvm_sregs) -> Result<()> {
+pub fn setup_page_tables(mem: &GuestMemoryMmap, sregs: &mut SpecialRegisters) -> Result<()> {
    // Puts PML5 or PML4 right after zero page but aligned to 4k.
-
    if unsafe { std::arch::x86_64::__cpuid(7).ecx } & (1 << 16) != 0 {
        // Entry covering VA [0..256TB)
        mem.write_obj(PML4_START.raw_value() | 0x03, PML5_START)
@@ -259,52 +256,11 @@ fn setup_page_tables(mem: &GuestMemoryMmap, sregs: &mut kvm_sregs) -> Result<()>
    Ok(())
 }

-macro_rules! kvm_msr {
-    ($msr:expr) => {
-        kvm_msr_entry {
-            index: $msr,
-            data: 0x0,
-            ..Default::default()
-        }
-    };
-}
-
-macro_rules! kvm_msr_data {
-    ($msr:expr, $data:expr) => {
-        kvm_msr_entry {
-            index: $msr,
-            data: $data,
-            ..Default::default()
-        }
-    };
-}
-
-pub fn boot_msr_entries() -> Msrs {
-    Msrs::from_entries(&[
-        kvm_msr!(msr_index::MSR_IA32_SYSENTER_CS),
-        kvm_msr!(msr_index::MSR_IA32_SYSENTER_ESP),
-        kvm_msr!(msr_index::MSR_IA32_SYSENTER_EIP),
-        kvm_msr!(msr_index::MSR_STAR),
-        kvm_msr!(msr_index::MSR_CSTAR),
-        kvm_msr!(msr_index::MSR_LSTAR),
-        kvm_msr!(msr_index::MSR_KERNEL_GS_BASE),
-        kvm_msr!(msr_index::MSR_SYSCALL_MASK),
-        kvm_msr!(msr_index::MSR_IA32_TSC),
-        kvm_msr_data!(
-            msr_index::MSR_IA32_MISC_ENABLE,
-            msr_index::MSR_IA32_MISC_ENABLE_FAST_STRING as u64
-        ),
-        kvm_msr_data!(msr_index::MSR_MTRRdefType, MTRR_ENABLE | MTRR_MEM_TYPE_WB),
-    ])
-}
-
 #[cfg(test)]
 mod tests {
-    extern crate kvm_ioctls;
    extern crate vm_memory;

    use super::*;
-    use kvm_ioctls::Kvm;
    use vm_memory::{GuestAddress, GuestMemoryMmap};

    fn create_guest_mem() -> GuestMemoryMmap {
@@ -317,7 +273,7 @@ mod tests {

    #[test]
    fn segments_and_sregs() {
-        let mut sregs: kvm_sregs = Default::default();
+        let mut sregs: SpecialRegisters = Default::default();
        let gm = create_guest_mem();
        configure_segments_and_sregs(&gm, &mut sregs, BootProtocol::LinuxBoot).unwrap();

@@ -381,7 +337,7 @@ mod tests {

    #[test]
    fn page_tables() {
-        let mut sregs: kvm_sregs = Default::default();
+        let mut sregs: SpecialRegisters = Default::default();
        let gm = create_guest_mem();
        setup_page_tables(&gm, &mut sregs).unwrap();

@@ -405,96 +361,4 @@ mod tests {
        assert_eq!(X86_CR4_PAE, sregs.cr4);
        assert_eq!(X86_CR0_PG, sregs.cr0);
    }
-
-    #[test]
-    fn test_setup_fpu() {
-        let kvm = Kvm::new().unwrap();
-        let vm = kvm.create_vm().unwrap();
-        let vcpu = vm.create_vcpu(0).unwrap();
-        setup_fpu(&vcpu).unwrap();
-
-        let expected_fpu: kvm_fpu = kvm_fpu {
-            fcw: 0x37f,
-            mxcsr: 0x1f80,
-            ..Default::default()
-        };
-        let actual_fpu: kvm_fpu = vcpu.get_fpu().unwrap();
-        // TODO: auto-generate kvm related structures with PartialEq on.
-        assert_eq!(expected_fpu.fcw, actual_fpu.fcw);
-        // Setting the mxcsr register from kvm_fpu inside setup_fpu does not influence anything.
-        // See 'kvm_arch_vcpu_ioctl_set_fpu' from arch/x86/kvm/x86.c.
-        // The mxcsr will stay 0 and the assert below fails. Decide whether or not we should
-        // remove it at all.
-        // assert!(expected_fpu.mxcsr == actual_fpu.mxcsr);
-    }
-
-    #[test]
-    fn test_setup_msrs() {
-        let kvm = Kvm::new().unwrap();
-        let vm = kvm.create_vm().unwrap();
-        let vcpu = vm.create_vcpu(0).unwrap();
-        setup_msrs(&vcpu).unwrap();
-
-        // This test will check against the last MSR entry configured (the tenth one).
-        // See create_msr_entries for details.
-        let mut msrs = Msrs::from_entries(&[kvm_msr_entry {
-            index: msr_index::MSR_IA32_MISC_ENABLE,
-            ..Default::default()
-        }]);
-
-        // get_msrs returns the number of msrs that it succeed in reading. We only want to read 1
-        // in this test case scenario.
-        let read_msrs = vcpu.get_msrs(&mut msrs).unwrap();
-        assert_eq!(read_msrs, 1);
-
-        // Official entries that were setup when we did setup_msrs. We need to assert that the
-        // tenth one (i.e the one with index msr_index::MSR_IA32_MISC_ENABLE has the data we
-        // expect.
-        let entry_vec = boot_msr_entries();
-        assert_eq!(entry_vec.as_slice()[9], msrs.as_slice()[0]);
-    }
-
-    #[test]
-    fn test_setup_regs() {
-        let kvm = Kvm::new().unwrap();
-        let vm = kvm.create_vm().unwrap();
-        let vcpu = vm.create_vcpu(0).unwrap();
-
-        let expected_regs: kvm_regs = kvm_regs {
-            rflags: 0x0000000000000002u64,
-            rip: 1,
-            rsp: 2,
-            rbp: 2,
-            rsi: 3,
-            ..Default::default()
-        };
-
-        setup_regs(
-            &vcpu,
-            expected_regs.rip,
-            expected_regs.rsp,
-            expected_regs.rsi,
-            BootProtocol::LinuxBoot,
-        )
-        .unwrap();
-
-        let actual_regs: kvm_regs = vcpu.get_regs().unwrap();
-        assert_eq!(actual_regs, expected_regs);
-    }
-
-    #[test]
-    fn test_setup_sregs() {
-        let kvm = Kvm::new().unwrap();
-        let vm = kvm.create_vm().unwrap();
-        let vcpu = vm.create_vcpu(0).unwrap();
-
-        let mut expected_sregs: kvm_sregs = vcpu.get_sregs().unwrap();
-        let gm = create_guest_mem();
-        configure_segments_and_sregs(&gm, &mut expected_sregs, BootProtocol::LinuxBoot).unwrap();
-        setup_page_tables(&gm, &mut expected_sregs).unwrap();
-
-        setup_sregs(&gm, &vcpu, BootProtocol::LinuxBoot).unwrap();
-        let actual_sregs: kvm_sregs = vcpu.get_sregs().unwrap();
-        assert_eq!(expected_sregs, actual_sregs);
-    }
 }
--- a/arch/src/x86_64/smbios.rs
+++ b/arch/src/x86_64/smbios.rs
@@ -0,0 +1,263 @@
+// Copyright © 2020 Intel Corporation
+//
+// Copyright 2019 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
+
+use layout::SMBIOS_START;
+use std::fmt::{self, Display};
+use std::mem;
+use std::result;
+use std::slice;
+use vm_memory::ByteValued;
+use vm_memory::{Address, Bytes, GuestAddress, GuestMemoryMmap};
+
+#[allow(unused_variables)]
+#[derive(Debug)]
+pub enum Error {
+    /// There was too little guest memory to store the entire SMBIOS table.
+    NotEnoughMemory,
+    /// The SMBIOS table has too little address space to be stored.
+    AddressOverflow,
+    /// Failure while zeroing out the memory for the SMBIOS table.
+    Clear,
+    /// Failure to write SMBIOS entrypoint structure
+    WriteSmbiosEp,
+    /// Failure to write additional data to memory
+    WriteData,
+}
+
+impl std::error::Error for Error {}
+
+impl Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::Error::*;
+
+        let description = match self {
+            NotEnoughMemory => "There was too little guest memory to store the SMBIOS table",
+            AddressOverflow => "The SMBIOS table has too little address space to be stored",
+            Clear => "Failure while zeroing out the memory for the SMBIOS table",
+            WriteSmbiosEp => "Failure to write SMBIOS entrypoint structure",
+            WriteData => "Failure to write additional data to memory",
+        };
+
+        write!(f, "SMBIOS error: {}", description)
+    }
+}
+
+pub type Result<T> = result::Result<T, Error>;
+
+// Constants sourced from SMBIOS Spec 3.2.0.
+const SM3_MAGIC_IDENT: &[u8; 5usize] = b"_SM3_";
+const BIOS_INFORMATION: u8 = 0;
+const SYSTEM_INFORMATION: u8 = 1;
+const END_OF_TABLE: u8 = 127;
+const PCI_SUPPORTED: u64 = 1 << 7;
+const IS_VIRTUAL_MACHINE: u8 = 1 << 4;
+
+fn compute_checksum<T: Copy>(v: &T) -> u8 {
+    // Safe because we are only reading the bytes within the size of the `T` reference `v`.
+    let v_slice = unsafe { slice::from_raw_parts(v as *const T as *const u8, mem::size_of::<T>()) };
+    let mut checksum: u8 = 0;
+    for i in v_slice.iter() {
+        checksum = checksum.wrapping_add(*i);
+    }
+    (!checksum).wrapping_add(1)
+}
+
+#[repr(packed)]
+#[derive(Default, Copy)]
+pub struct Smbios30Entrypoint {
+    pub signature: [u8; 5usize],
+    pub checksum: u8,
+    pub length: u8,
+    pub majorver: u8,
+    pub minorver: u8,
+    pub docrev: u8,
+    pub revision: u8,
+    pub reserved: u8,
+    pub max_size: u32,
+    pub physptr: u64,
+}
+unsafe impl ByteValued for Smbios30Entrypoint {}
+
+impl Clone for Smbios30Entrypoint {
+    fn clone(&self) -> Self {
+        *self
+    }
+}
+
+#[repr(packed)]
+#[derive(Default, Copy)]
+pub struct SmbiosBiosInfo {
+    pub typ: u8,
+    pub length: u8,
+    pub handle: u16,
+    pub vendor: u8,
+    pub version: u8,
+    pub start_addr: u16,
+    pub release_date: u8,
+    pub rom_size: u8,
+    pub characteristics: u64,
+    pub characteristics_ext1: u8,
+    pub characteristics_ext2: u8,
+}
+
+impl Clone for SmbiosBiosInfo {
+    fn clone(&self) -> Self {
+        *self
+    }
+}
+
+unsafe impl ByteValued for SmbiosBiosInfo {}
+
+#[repr(packed)]
+#[derive(Default, Copy)]
+pub struct SmbiosSysInfo {
+    pub typ: u8,
+    pub length: u8,
+    pub handle: u16,
+    pub manufacturer: u8,
+    pub product_name: u8,
+    pub version: u8,
+    pub serial_number: u8,
+    pub uuid: [u8; 16usize],
+    pub wake_up_type: u8,
+    pub sku: u8,
+    pub family: u8,
+}
+
+impl Clone for SmbiosSysInfo {
+    fn clone(&self) -> Self {
+        *self
+    }
+}
+
+unsafe impl ByteValued for SmbiosSysInfo {}
+
+fn write_and_incr<T: ByteValued>(
+    mem: &GuestMemoryMmap,
+    val: T,
+    mut curptr: GuestAddress,
+) -> Result<GuestAddress> {
+    mem.write_obj(val, curptr).map_err(|_| Error::WriteData)?;
+    curptr = curptr
+        .checked_add(mem::size_of::<T>() as u64)
+        .ok_or(Error::NotEnoughMemory)?;
+    Ok(curptr)
+}
+
+fn write_string(
+    mem: &GuestMemoryMmap,
+    val: &str,
+    mut curptr: GuestAddress,
+) -> Result<GuestAddress> {
+    for c in val.as_bytes().iter() {
+        curptr = write_and_incr(mem, *c, curptr)?;
+    }
+    curptr = write_and_incr(mem, 0 as u8, curptr)?;
+    Ok(curptr)
+}
+
+pub fn setup_smbios(mem: &GuestMemoryMmap) -> Result<()> {
+    let physptr = GuestAddress(SMBIOS_START)
+        .checked_add(mem::size_of::<Smbios30Entrypoint>() as u64)
+        .ok_or(Error::NotEnoughMemory)?;
+    let mut curptr = physptr;
+    let mut handle = 0;
+
+    {
+        handle += 1;
+        let mut smbios_biosinfo = SmbiosBiosInfo::default();
+        smbios_biosinfo.typ = BIOS_INFORMATION;
+        smbios_biosinfo.length = mem::size_of::<SmbiosBiosInfo>() as u8;
+        smbios_biosinfo.handle = handle;
+        smbios_biosinfo.vendor = 1; // First string written in this section
+        smbios_biosinfo.version = 2; // Second string written in this section
+        smbios_biosinfo.characteristics = PCI_SUPPORTED;
+        smbios_biosinfo.characteristics_ext2 = IS_VIRTUAL_MACHINE;
+        curptr = write_and_incr(mem, smbios_biosinfo, curptr)?;
+        curptr = write_string(mem, "cloud-hypervisor", curptr)?;
+        curptr = write_string(mem, "0", curptr)?;
+        curptr = write_and_incr(mem, 0 as u8, curptr)?;
+    }
+
+    {
+        handle += 1;
+        let mut smbios_sysinfo = SmbiosSysInfo::default();
+        smbios_sysinfo.typ = SYSTEM_INFORMATION;
+        smbios_sysinfo.length = mem::size_of::<SmbiosSysInfo>() as u8;
+        smbios_sysinfo.handle = handle;
+        smbios_sysinfo.manufacturer = 1; // First string written in this section
+        smbios_sysinfo.product_name = 2; // Second string written in this section
+        curptr = write_and_incr(mem, smbios_sysinfo, curptr)?;
+        curptr = write_string(mem, "Cloud Hypervisor", curptr)?;
+        curptr = write_string(mem, "cloud-hypervisor", curptr)?;
+        curptr = write_and_incr(mem, 0 as u8, curptr)?;
+    }
+
+    {
+        handle += 1;
+        let mut smbios_sysinfo = SmbiosSysInfo::default();
+        smbios_sysinfo.typ = END_OF_TABLE;
+        smbios_sysinfo.length = mem::size_of::<SmbiosSysInfo>() as u8;
+        smbios_sysinfo.handle = handle;
+        curptr = write_and_incr(mem, smbios_sysinfo, curptr)?;
+        curptr = write_and_incr(mem, 0 as u8, curptr)?;
+    }
+
+    {
+        let mut smbios_ep = Smbios30Entrypoint::default();
+        smbios_ep.signature = *SM3_MAGIC_IDENT;
+        smbios_ep.length = mem::size_of::<Smbios30Entrypoint>() as u8;
+        // SMBIOS rev 3.2.0
+        smbios_ep.majorver = 0x03;
+        smbios_ep.minorver = 0x02;
+        smbios_ep.docrev = 0x00;
+        smbios_ep.revision = 0x01; // SMBIOS 3.0
+        smbios_ep.max_size = curptr.unchecked_offset_from(physptr) as u32;
+        smbios_ep.physptr = physptr.0;
+        smbios_ep.checksum = compute_checksum(&smbios_ep);
+        mem.write_obj(smbios_ep, GuestAddress(SMBIOS_START))
+            .map_err(|_| Error::WriteSmbiosEp)?;
+    }
+
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn struct_size() {
+        assert_eq!(
+            mem::size_of::<Smbios30Entrypoint>(),
+            0x18usize,
+            concat!("Size of: ", stringify!(Smbios30Entrypoint))
+        );
+        assert_eq!(
+            mem::size_of::<SmbiosBiosInfo>(),
+            0x14usize,
+            concat!("Size of: ", stringify!(SmbiosBiosInfo))
+        );
+        assert_eq!(
+            mem::size_of::<SmbiosSysInfo>(),
+            0x1busize,
+            concat!("Size of: ", stringify!(SmbiosSysInfo))
+        );
+    }
+
+    #[test]
+    fn entrypoint_checksum() {
+        let mem = GuestMemoryMmap::from_ranges(&[(GuestAddress(SMBIOS_START), 4096)]).unwrap();
+
+        setup_smbios(&mem).unwrap();
+
+        let smbios_ep: Smbios30Entrypoint = mem.read_obj(GuestAddress(SMBIOS_START)).unwrap();
+
+        assert_eq!(compute_checksum(&smbios_ep), 0);
+    }
+}
--- a/arch_gen/src/x86/mod.rs
+++ b/arch_gen/src/x86/mod.rs
@@ -20,6 +20,3 @@
 #[allow(non_upper_case_globals)]
 #[allow(clippy::unreadable_literal, clippy::redundant_static_lifetimes)]
 pub mod mpspec;
-#[allow(non_upper_case_globals)]
-#[allow(clippy::unreadable_literal, clippy::redundant_static_lifetimes)]
-pub mod msr_index;
--- a/block_util/Cargo.toml
+++ b/block_util/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "block_util"
+version = "0.1.0"
+authors = ["The Cloud Hypervisor Authors"]
+edition = "2018"
+
+[features]
+default = []
+io_uring = []
+
+[dependencies]
+io-uring = { git = "https://github.com/tokio-rs/io-uring.git", branch = "0.4" }
+libc = "0.2.74"
+log = "0.4.11"
+serde = ">=1.0.27"
+serde_derive = ">=1.0.27"
+serde_json = ">=1.0.9"
+virtio-bindings = { version = "0.1", features = ["virtio-v5_0_0"]}
+vm-memory = { version = "0.2.1", features = ["backend-mmap", "backend-atomic"] }
+vm-virtio = { path = "../vm-virtio" }
+vmm-sys-util = ">=0.3.1"
--- a/block_util/src/lib.rs
+++ b/block_util/src/lib.rs
@@ -0,0 +1,545 @@
+// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+//
+// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE-BSD-3-Clause file.
+//
+// Copyright © 2020 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
+
+#[macro_use]
+extern crate log;
+#[macro_use]
+extern crate serde_derive;
+
+#[cfg(feature = "io_uring")]
+use io_uring::{opcode, IoUring, Probe};
+use serde::ser::{Serialize, SerializeStruct, Serializer};
+use std::cmp;
+use std::io::{self, Read, Seek, SeekFrom, Write};
+use std::os::linux::fs::MetadataExt;
+#[cfg(feature = "io_uring")]
+use std::os::unix::io::{AsRawFd, RawFd};
+use std::path::PathBuf;
+use std::result;
+use virtio_bindings::bindings::virtio_blk::*;
+use vm_memory::{ByteValued, Bytes, GuestAddress, GuestMemory, GuestMemoryError, GuestMemoryMmap};
+use vm_virtio::DescriptorChain;
+#[cfg(feature = "io_uring")]
+use vmm_sys_util::eventfd::EventFd;
+
+const SECTOR_SHIFT: u8 = 9;
+pub const SECTOR_SIZE: u64 = (0x01 as u64) << SECTOR_SHIFT;
+
+#[derive(Debug)]
+pub enum Error {
+    /// Guest gave us bad memory addresses.
+    GuestMemory(GuestMemoryError),
+    /// Guest gave us offsets that would have overflowed a usize.
+    CheckedOffset(GuestAddress, usize),
+    /// Guest gave us a write only descriptor that protocol says to read from.
+    UnexpectedWriteOnlyDescriptor,
+    /// Guest gave us a read only descriptor that protocol says to write to.
+    UnexpectedReadOnlyDescriptor,
+    /// Guest gave us too few descriptors in a descriptor chain.
+    DescriptorChainTooShort,
+    /// Guest gave us a descriptor that was too short to use.
+    DescriptorLengthTooSmall,
+    /// Getting a block's metadata fails for any reason.
+    GetFileMetadata,
+    /// The requested operation would cause a seek beyond disk end.
+    InvalidOffset,
+}
+
+fn build_device_id(disk_path: &PathBuf) -> result::Result<String, Error> {
+    let blk_metadata = match disk_path.metadata() {
+        Err(_) => return Err(Error::GetFileMetadata),
+        Ok(m) => m,
+    };
+    // This is how kvmtool does it.
+    let device_id = format!(
+        "{}{}{}",
+        blk_metadata.st_dev(),
+        blk_metadata.st_rdev(),
+        blk_metadata.st_ino()
+    );
+    Ok(device_id)
+}
+
+pub fn build_disk_image_id(disk_path: &PathBuf) -> Vec<u8> {
+    let mut default_disk_image_id = vec![0; VIRTIO_BLK_ID_BYTES as usize];
+    match build_device_id(disk_path) {
+        Err(_) => {
+            warn!("Could not generate device id. We'll use a default.");
+        }
+        Ok(m) => {
+            // The kernel only knows to read a maximum of VIRTIO_BLK_ID_BYTES.
+            // This will also zero out any leftover bytes.
+            let disk_id = m.as_bytes();
+            let bytes_to_copy = cmp::min(disk_id.len(), VIRTIO_BLK_ID_BYTES as usize);
+            default_disk_image_id[..bytes_to_copy].clone_from_slice(&disk_id[..bytes_to_copy])
+        }
+    }
+    default_disk_image_id
+}
+
+#[derive(Debug)]
+pub enum ExecuteError {
+    BadRequest(Error),
+    Flush(io::Error),
+    Read(GuestMemoryError),
+    Seek(io::Error),
+    Write(GuestMemoryError),
+    Unsupported(u32),
+    SubmitIoUring(io::Error),
+    GetHostAddress(GuestMemoryError),
+}
+
+impl ExecuteError {
+    pub fn status(&self) -> u32 {
+        match *self {
+            ExecuteError::BadRequest(_) => VIRTIO_BLK_S_IOERR,
+            ExecuteError::Flush(_) => VIRTIO_BLK_S_IOERR,
+            ExecuteError::Read(_) => VIRTIO_BLK_S_IOERR,
+            ExecuteError::Seek(_) => VIRTIO_BLK_S_IOERR,
+            ExecuteError::Write(_) => VIRTIO_BLK_S_IOERR,
+            ExecuteError::Unsupported(_) => VIRTIO_BLK_S_UNSUPP,
+            ExecuteError::SubmitIoUring(_) => VIRTIO_BLK_S_IOERR,
+            ExecuteError::GetHostAddress(_) => VIRTIO_BLK_S_IOERR,
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum RequestType {
+    In,
+    Out,
+    Flush,
+    GetDeviceID,
+    Unsupported(u32),
+}
+
+pub fn request_type(
+    mem: &GuestMemoryMmap,
+    desc_addr: GuestAddress,
+) -> result::Result<RequestType, Error> {
+    let type_ = mem.read_obj(desc_addr).map_err(Error::GuestMemory)?;
+    match type_ {
+        VIRTIO_BLK_T_IN => Ok(RequestType::In),
+        VIRTIO_BLK_T_OUT => Ok(RequestType::Out),
+        VIRTIO_BLK_T_FLUSH => Ok(RequestType::Flush),
+        VIRTIO_BLK_T_GET_ID => Ok(RequestType::GetDeviceID),
+        t => Ok(RequestType::Unsupported(t)),
+    }
+}
+
+fn sector(mem: &GuestMemoryMmap, desc_addr: GuestAddress) -> result::Result<u64, Error> {
+    const SECTOR_OFFSET: usize = 8;
+    let addr = match mem.checked_offset(desc_addr, SECTOR_OFFSET) {
+        Some(v) => v,
+        None => return Err(Error::CheckedOffset(desc_addr, SECTOR_OFFSET)),
+    };
+
+    mem.read_obj(addr).map_err(Error::GuestMemory)
+}
+
+pub struct Request {
+    pub request_type: RequestType,
+    pub sector: u64,
+    pub data_addr: GuestAddress,
+    pub data_len: u32,
+    pub status_addr: GuestAddress,
+    pub writeback: bool,
+}
+
+impl Request {
+    pub fn parse(
+        avail_desc: &DescriptorChain,
+        mem: &GuestMemoryMmap,
+    ) -> result::Result<Request, Error> {
+        // The head contains the request type which MUST be readable.
+        if avail_desc.is_write_only() {
+            return Err(Error::UnexpectedWriteOnlyDescriptor);
+        }
+
+        let mut req = Request {
+            request_type: request_type(&mem, avail_desc.addr)?,
+            sector: sector(&mem, avail_desc.addr)?,
+            data_addr: GuestAddress(0),
+            data_len: 0,
+            status_addr: GuestAddress(0),
+            writeback: true,
+        };
+
+        let data_desc;
+        let status_desc;
+        let desc = avail_desc
+            .next_descriptor()
+            .ok_or(Error::DescriptorChainTooShort)?;
+
+        if !desc.has_next() {
+            status_desc = desc;
+            // Only flush requests are allowed to skip the data descriptor.
+            if req.request_type != RequestType::Flush {
+                return Err(Error::DescriptorChainTooShort);
+            }
+        } else {
+            data_desc = desc;
+            status_desc = data_desc
+                .next_descriptor()
+                .ok_or(Error::DescriptorChainTooShort)?;
+
+            if data_desc.is_write_only() && req.request_type == RequestType::Out {
+                return Err(Error::UnexpectedWriteOnlyDescriptor);
+            }
+            if !data_desc.is_write_only() && req.request_type == RequestType::In {
+                return Err(Error::UnexpectedReadOnlyDescriptor);
+            }
+            if !data_desc.is_write_only() && req.request_type == RequestType::GetDeviceID {
+                return Err(Error::UnexpectedReadOnlyDescriptor);
+            }
+
+            req.data_addr = data_desc.addr;
+            req.data_len = data_desc.len;
+        }
+
+        // The status MUST always be writable.
+        if !status_desc.is_write_only() {
+            return Err(Error::UnexpectedReadOnlyDescriptor);
+        }
+
+        if status_desc.len < 1 {
+            return Err(Error::DescriptorLengthTooSmall);
+        }
+
+        req.status_addr = status_desc.addr;
+
+        Ok(req)
+    }
+
+    #[allow(clippy::ptr_arg)]
+    pub fn execute<T: Seek + Read + Write>(
+        &self,
+        disk: &mut T,
+        disk_nsectors: u64,
+        mem: &GuestMemoryMmap,
+        disk_id: &Vec<u8>,
+    ) -> result::Result<u32, ExecuteError> {
+        let mut top: u64 = u64::from(self.data_len) / SECTOR_SIZE;
+        if u64::from(self.data_len) % SECTOR_SIZE != 0 {
+            top += 1;
+        }
+        top = top
+            .checked_add(self.sector)
+            .ok_or(ExecuteError::BadRequest(Error::InvalidOffset))?;
+        if top > disk_nsectors {
+            return Err(ExecuteError::BadRequest(Error::InvalidOffset));
+        }
+
+        disk.seek(SeekFrom::Start(self.sector << SECTOR_SHIFT))
+            .map_err(ExecuteError::Seek)?;
+
+        match self.request_type {
+            RequestType::In => {
+                mem.read_exact_from(self.data_addr, disk, self.data_len as usize)
+                    .map_err(ExecuteError::Read)?;
+                return Ok(self.data_len);
+            }
+            RequestType::Out => {
+                mem.write_all_to(self.data_addr, disk, self.data_len as usize)
+                    .map_err(ExecuteError::Write)?;
+                if !self.writeback {
+                    disk.flush().map_err(ExecuteError::Flush)?;
+                }
+            }
+            RequestType::Flush => disk.flush().map_err(ExecuteError::Flush)?,
+            RequestType::GetDeviceID => {
+                if (self.data_len as usize) < disk_id.len() {
+                    return Err(ExecuteError::BadRequest(Error::InvalidOffset));
+                }
+                mem.write_slice(&disk_id.as_slice(), self.data_addr)
+                    .map_err(ExecuteError::Write)?;
+            }
+            RequestType::Unsupported(t) => return Err(ExecuteError::Unsupported(t)),
+        };
+        Ok(0)
+    }
+
+    #[cfg(feature = "io_uring")]
+    pub fn execute_io_uring(
+        &self,
+        mem: &GuestMemoryMmap,
+        io_uring: &mut IoUring,
+        disk_nsectors: u64,
+        disk_image_fd: RawFd,
+        disk_id: &[u8],
+        user_data: u64,
+    ) -> result::Result<bool, ExecuteError> {
+        let data_len = self.data_len;
+        let sector = self.sector;
+        let data_addr = self.data_addr;
+        let request_type = self.request_type;
+
+        let mut top: u64 = u64::from(data_len) / SECTOR_SIZE;
+        if u64::from(data_len) % SECTOR_SIZE != 0 {
+            top += 1;
+        }
+        top = top
+            .checked_add(sector)
+            .ok_or(ExecuteError::BadRequest(Error::InvalidOffset))?;
+        if top > disk_nsectors {
+            return Err(ExecuteError::BadRequest(Error::InvalidOffset));
+        }
+
+        let buf = mem
+            .get_slice(data_addr, data_len as usize)
+            .map_err(ExecuteError::GetHostAddress)?
+            .as_ptr();
+        let offset = (sector as i64) << SECTOR_SHIFT;
+
+        let (submitter, sq, _) = io_uring.split();
+        let mut avail_sq = sq.available();
+
+        // Queue operations expected to be submitted.
+        match request_type {
+            RequestType::In => {
+                // Safe because we know the file descriptor is valid and we
+                // relied on vm-memory to provide the buffer address.
+                let _ = unsafe {
+                    avail_sq.push(
+                        opcode::Read::new(opcode::types::Fd(disk_image_fd), buf, data_len)
+                            .offset(offset)
+                            .build()
+                            .user_data(user_data),
+                    )
+                };
+            }
+            RequestType::Out => {
+                // Safe because we know the file descriptor is valid and we
+                // relied on vm-memory to provide the buffer address.
+                let _ = unsafe {
+                    avail_sq.push(
+                        opcode::Write::new(opcode::types::Fd(disk_image_fd), buf, data_len)
+                            .offset(offset)
+                            .build()
+                            .user_data(user_data),
+                    )
+                };
+            }
+            RequestType::Flush => {
+                // Safe because we know the file descriptor is valid.
+                let _ = unsafe {
+                    avail_sq.push(
+                        opcode::Fsync::new(opcode::types::Fd(disk_image_fd))
+                            .build()
+                            .user_data(user_data),
+                    )
+                };
+            }
+            RequestType::GetDeviceID => {
+                if (data_len as usize) < disk_id.len() {
+                    return Err(ExecuteError::BadRequest(Error::InvalidOffset));
+                }
+                mem.write_slice(disk_id, data_addr)
+                    .map_err(ExecuteError::Write)?;
+                return Ok(false);
+            }
+            RequestType::Unsupported(t) => return Err(ExecuteError::Unsupported(t)),
+        }
+
+        // Update the submission queue and submit new operations to the
+        // io_uring instance.
+        avail_sq.sync();
+        submitter.submit().map_err(ExecuteError::SubmitIoUring)?;
+
+        Ok(true)
+    }
+
+    pub fn set_writeback(&mut self, writeback: bool) {
+        self.writeback = writeback
+    }
+}
+
+#[derive(Copy, Clone, Debug, Default, Deserialize)]
+#[repr(C, packed)]
+pub struct VirtioBlockConfig {
+    pub capacity: u64,
+    pub size_max: u32,
+    pub seg_max: u32,
+    pub geometry: VirtioBlockGeometry,
+    pub blk_size: u32,
+    pub physical_block_exp: u8,
+    pub alignment_offset: u8,
+    pub min_io_size: u16,
+    pub opt_io_size: u32,
+    pub writeback: u8,
+    pub unused: u8,
+    pub num_queues: u16,
+    pub max_discard_sectors: u32,
+    pub max_discard_seg: u32,
+    pub discard_sector_alignment: u32,
+    pub max_write_zeroes_sectors: u32,
+    pub max_write_zeroes_seg: u32,
+    pub write_zeroes_may_unmap: u8,
+    pub unused1: [u8; 3],
+}
+
+// We must explicitly implement Serialize since the structure is packed and
+// it's unsafe to borrow from a packed structure. And by default, if we derive
+// Serialize from serde, it will borrow the values from the structure.
+// That's why this implementation copies each field separately before it
+// serializes the entire structure field by field.
+impl Serialize for VirtioBlockConfig {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let capacity = self.capacity;
+        let size_max = self.size_max;
+        let seg_max = self.seg_max;
+        let geometry = self.geometry;
+        let blk_size = self.blk_size;
+        let physical_block_exp = self.physical_block_exp;
+        let alignment_offset = self.alignment_offset;
+        let min_io_size = self.min_io_size;
+        let opt_io_size = self.opt_io_size;
+        let writeback = self.writeback;
+        let unused = self.unused;
+        let num_queues = self.num_queues;
+        let max_discard_sectors = self.max_discard_sectors;
+        let max_discard_seg = self.max_discard_seg;
+        let discard_sector_alignment = self.discard_sector_alignment;
+        let max_write_zeroes_sectors = self.max_write_zeroes_sectors;
+        let max_write_zeroes_seg = self.max_write_zeroes_seg;
+        let write_zeroes_may_unmap = self.write_zeroes_may_unmap;
+        let unused1 = self.unused1;
+
+        let mut virtio_block_config = serializer.serialize_struct("VirtioBlockConfig", 60)?;
+        virtio_block_config.serialize_field("capacity", &capacity)?;
+        virtio_block_config.serialize_field("size_max", &size_max)?;
+        virtio_block_config.serialize_field("seg_max", &seg_max)?;
+        virtio_block_config.serialize_field("geometry", &geometry)?;
+        virtio_block_config.serialize_field("blk_size", &blk_size)?;
+        virtio_block_config.serialize_field("physical_block_exp", &physical_block_exp)?;
+        virtio_block_config.serialize_field("alignment_offset", &alignment_offset)?;
+        virtio_block_config.serialize_field("min_io_size", &min_io_size)?;
+        virtio_block_config.serialize_field("opt_io_size", &opt_io_size)?;
+        virtio_block_config.serialize_field("writeback", &writeback)?;
+        virtio_block_config.serialize_field("unused", &unused)?;
+        virtio_block_config.serialize_field("num_queues", &num_queues)?;
+        virtio_block_config.serialize_field("max_discard_sectors", &max_discard_sectors)?;
+        virtio_block_config.serialize_field("max_discard_seg", &max_discard_seg)?;
+        virtio_block_config
+            .serialize_field("discard_sector_alignment", &discard_sector_alignment)?;
+        virtio_block_config
+            .serialize_field("max_write_zeroes_sectors", &max_write_zeroes_sectors)?;
+        virtio_block_config.serialize_field("max_write_zeroes_seg", &max_write_zeroes_seg)?;
+        virtio_block_config.serialize_field("write_zeroes_may_unmap", &write_zeroes_may_unmap)?;
+        virtio_block_config.serialize_field("unused1", &unused1)?;
+        virtio_block_config.end()
+    }
+}
+
+unsafe impl ByteValued for VirtioBlockConfig {}
+
+#[derive(Copy, Clone, Debug, Default, Deserialize)]
+#[repr(C, packed)]
+pub struct VirtioBlockGeometry {
+    pub cylinders: u16,
+    pub heads: u8,
+    pub sectors: u8,
+}
+
+// We must explicitly implement Serialize since the structure is packed and
+// it's unsafe to borrow from a packed structure. And by default, if we derive
+// Serialize from serde, it will borrow the values from the structure.
+// That's why this implementation copies each field separately before it
+// serializes the entire structure field by field.
+impl Serialize for VirtioBlockGeometry {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let cylinders = self.cylinders;
+        let heads = self.heads;
+        let sectors = self.sectors;
+
+        let mut virtio_block_geometry = serializer.serialize_struct("VirtioBlockGeometry", 4)?;
+        virtio_block_geometry.serialize_field("cylinders", &cylinders)?;
+        virtio_block_geometry.serialize_field("heads", &heads)?;
+        virtio_block_geometry.serialize_field("sectors", &sectors)?;
+        virtio_block_geometry.end()
+    }
+}
+
+unsafe impl ByteValued for VirtioBlockGeometry {}
+
+/// Check if io_uring for block device can be used on the current system, as
+/// it correctly supports the expected io_uring features.
+#[cfg(feature = "io_uring")]
+pub fn block_io_uring_is_supported() -> bool {
+    let error_msg = "io_uring not supported:";
+
+    // Check we can create an io_uring instance, which effectively verifies
+    // that io_uring_setup() syscall is supported.
+    let io_uring = match IoUring::new(1) {
+        Ok(io_uring) => io_uring,
+        Err(e) => {
+            info!("{} failed to create io_uring instance: {}", error_msg, e);
+            return false;
+        }
+    };
+
+    let submitter = io_uring.submitter();
+
+    let event_fd = match EventFd::new(libc::EFD_NONBLOCK) {
+        Ok(fd) => fd,
+        Err(e) => {
+            info!("{} failed to create eventfd: {}", error_msg, e);
+            return false;
+        }
+    };
+
+    // Check we can register an eventfd as this is going to be needed while
+    // using io_uring with the virtio block device. This also validates that
+    // io_uring_register() syscall is supported.
+    match submitter.register_eventfd(event_fd.as_raw_fd()) {
+        Ok(_) => {}
+        Err(e) => {
+            info!("{} failed to register eventfd: {}", error_msg, e);
+            return false;
+        }
+    }
+
+    let mut probe = Probe::new();
+
+    // Check we can register a probe to validate supported operations.
+    match submitter.register_probe(&mut probe) {
+        Ok(_) => {}
+        Err(e) => {
+            info!("{} failed to register a probe: {}", error_msg, e);
+            return false;
+        }
+    }
+
+    // Check IORING_OP_FSYNC is supported
+    if !probe.is_supported(opcode::Fsync::CODE) {
+        info!("{} IORING_OP_FSYNC operation not supported", error_msg);
+        return false;
+    }
+
+    // Check IORING_OP_READ is supported
+    if !probe.is_supported(opcode::Read::CODE) {
+        info!("{} IORING_OP_READ operation not supported", error_msg);
+        return false;
+    }
+
+    // Check IORING_OP_WRITE is supported
+    if !probe.is_supported(opcode::Write::CODE) {
+        info!("{} IORING_OP_WRITE operation not supported", error_msg);
+        return false;
+    }
+
+    true
+}
--- a/devices/Cargo.toml
+++ b/devices/Cargo.toml
@@ -8,8 +8,8 @@ anyhow = "1.0"
 bitflags = ">=1.2.1"
 byteorder = "1.3.4"
 epoll = ">=4.0.1"
-libc = "0.2.71"
-log = "0.4.8"
+libc = "0.2.74"
+log = "0.4.11"
 serde = {version = ">=1.0.27", features = ["rc"] }
 serde_derive = ">=1.0.27"
 serde_json = ">=1.0.9"
--- a/devices/src/acpi.rs
+++ b/devices/src/acpi.rs
@@ -5,6 +5,7 @@

 use acpi_tables::{aml, aml::Aml};
 use std::sync::Arc;
+use std::time::Instant;
 use vm_device::interrupt::InterruptSourceGroup;
 use vmm_sys_util::eventfd::EventFd;
 use BusDevice;
@@ -149,3 +150,39 @@ impl Aml for AcpiGEDDevice {
        .to_aml_bytes()
    }
 }
+
+pub struct AcpiPMTimerDevice {
+    start: Instant,
+}
+
+impl AcpiPMTimerDevice {
+    pub fn new() -> Self {
+        Self {
+            start: Instant::now(),
+        }
+    }
+}
+
+impl Default for AcpiPMTimerDevice {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl BusDevice for AcpiPMTimerDevice {
+    fn read(&mut self, _base: u64, _offset: u64, data: &mut [u8]) {
+        let now = Instant::now();
+        let since = now.duration_since(self.start);
+        let nanos = since.as_nanos();
+
+        const PM_TIMER_FREQUENCY_HZ: u128 = 3_579_545;
+        const NANOS_PER_SECOND: u128 = 1_000_000_000;
+
+        let counter = (nanos * PM_TIMER_FREQUENCY_HZ) / NANOS_PER_SECOND;
+        let counter: u32 = (counter & 0xffff_ffff) as u32;
+
+        data.copy_from_slice(&counter.to_le_bytes());
+    }
+
+    fn write(&mut self, _base: u64, _offset: u64, _data: &[u8]) {}
+}
--- a/devices/src/ioapic.rs
+++ b/devices/src/ioapic.rs
@@ -344,6 +344,7 @@ impl Ioapic {
            high_addr: 0x0,
            low_addr,
            data,
+            devid: 0,
        };

        self.interrupt_source_group
--- a/devices/src/legacy/cmos.rs
+++ b/devices/src/legacy/cmos.rs
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

-use libc::{gmtime_r, time, time_t, tm};
+use libc::{clock_gettime, gmtime_r, time_t, timespec, tm, CLOCK_REALTIME};
 use std::cmp::min;
 use std::mem;

@@ -77,14 +77,17 @@ impl BusDevice for Cmos {
                let day;
                let month;
                let year;
-                // The time and gmtime_r calls are safe as long as the structs they are given are
-                // large enough, and neither of them fail. It is safe to zero initialize the tm
-                // struct because it contains only plain data.
-                unsafe {
+                // The clock_gettime and gmtime_r calls are safe as long as the structs they are
+                // given are large enough, and neither of them fail. It is safe to zero initialize
+                // the tm and timespec struct because it contains only plain data.
+                let update_in_progress = unsafe {
+                    let mut timespec: timespec = mem::zeroed();
+                    clock_gettime(CLOCK_REALTIME, &mut timespec as *mut _);
+
+                    let now: time_t = timespec.tv_sec;
                    let mut tm: tm = mem::zeroed();
-                    let mut now: time_t = 0;
-                    time(&mut now as *mut _);
                    gmtime_r(&now, &mut tm as *mut _);
+
                    // The following lines of code are safe but depend on tm being in scope.
                    seconds = tm.tm_sec;
                    minutes = tm.tm_min;
@@ -93,6 +96,11 @@ impl BusDevice for Cmos {
                    day = tm.tm_mday;
                    month = tm.tm_mon + 1;
                    year = tm.tm_year;
+
+                    // Update in Progress bit held for last 224us of each second
+                    const NANOSECONDS_PER_SECOND: i64 = 1_000_000_000;
+                    const UIP_HOLD_LENGTH: i64 = 8 * NANOSECONDS_PER_SECOND / 32768;
+                    timespec.tv_nsec >= (NANOSECONDS_PER_SECOND - UIP_HOLD_LENGTH)
                };
                match self.index {
                    0x00 => to_bcd(seconds as u8),
@@ -102,6 +110,8 @@ impl BusDevice for Cmos {
                    0x07 => to_bcd(day as u8),
                    0x08 => to_bcd(month as u8),
                    0x09 => to_bcd((year % 100) as u8),
+                    // Bit 5 for 32kHz clock. Bit 7 for Update in Progress
+                    0x0a => 1 << 5 | (update_in_progress as u8) << 7,
                    0x32 => to_bcd(((year + 1900) / 100) as u8),
                    _ => {
                        // self.index is always guaranteed to be in range via INDEX_MASK.
--- a/devices/src/lib.rs
+++ b/devices/src/lib.rs
@@ -39,7 +39,7 @@ pub mod ioapic;
 pub mod legacy;

 #[cfg(feature = "acpi")]
-pub use self::acpi::{AcpiGEDDevice, AcpiShutdownDevice};
+pub use self::acpi::{AcpiGEDDevice, AcpiPMTimerDevice, AcpiShutdownDevice};
 pub use self::bus::{Bus, BusDevice, Error as BusError};

 pub type DeviceEventT = u16;
--- a/docs/api.md
+++ b/docs/api.md
@@ -78,25 +78,26 @@ Shut the VMM down                   | `/vmm.shutdown` | N/A          | N/A

 #### Virtual Machine (VM) Actions

-Action                             | Endpoint            | Request Body              | Response Body     | Prerequisites
-----------------------------------|---------------------|---------------------------|-------------------|---------------------------
-Create the VM                      | `/vm.create`        | `/schemas/VmConfig`       | N/A               | The VM is not created yet
-Delete the VM                      | `/vm.delete`        | N/A                       | N/A               | N/A
-Boot the VM                        | `/vm.boot`          | N/A                       | N/A               | The VM is created but not booted
-Shut the VM down                   | `/vm.shutdown`      | N/A                       | N/A               | The VM is booted
-Reboot the VM                      | `/vm.reboot`        | N/A                       | N/A               | The VM is booted
-Pause the VM                       | `/vm.pause`         | N/A                       | N/A               | The VM is booted
-Resume the VM                      | `/vm.resume`        | N/A                       | N/A               | The VM is paused
-Add/remove CPUs to/from the VM     | `/vm.resize`        | `/schemas/VmResize`       | N/A               | The VM is booted
-Remove memory from the VM          | `/vm.resize`        | `/schemas/VmResize`       | N/A               | The VM is booted
-Dump the VM information            | `/vm.info`          | N/A                       | `/schemas/VmInfo` | The VM is created
-Add VFIO PCI device to the VM      | `/vm.add-device`    | `/schemas/VmAddDevice`    | N/A               | The VM is booted
-Remove VFIO PCI device from the VM | `/vm.remove-device` | `/schemas/VmRemoveDevice` | N/A               | The VM is booted
-Add disk device to the VM          | `/vm.add-disk`      | `/schemas/DiskConfig`     | N/A               | The VM is booted
-Add fs device to the VM            | `/vm.add-fs`        | `/schemas/FsConfig`       | N/A               | The VM is booted
-Add pmem device to the VM          | `/vm.add-pmem`      | `/schemas/PmemConfig`     | N/A               | The VM is booted
-Add network device to the VM       | `/vm.add-net`       | `/schemas/NetConfig`      | N/A               | The VM is booted
-Add vsock device to the VM         | `/vm.add-vsock`     | `/schemas/VsockConfig`    | N/A               | The VM is booted
+Action                             | Endpoint            | Request Body              | Response Body            | Prerequisites
+-----------------------------------|---------------------|---------------------------|--------------------------|---------------------------
+Create the VM                      | `/vm.create`        | `/schemas/VmConfig`       | N/A                      | The VM is not created yet
+Delete the VM                      | `/vm.delete`        | N/A                       | N/A                      | N/A
+Boot the VM                        | `/vm.boot`          | N/A                       | N/A                      | The VM is created but not booted
+Shut the VM down                   | `/vm.shutdown`      | N/A                       | N/A                      | The VM is booted
+Reboot the VM                      | `/vm.reboot`        | N/A                       | N/A                      | The VM is booted
+Pause the VM                       | `/vm.pause`         | N/A                       | N/A                      | The VM is booted
+Resume the VM                      | `/vm.resume`        | N/A                       | N/A                      | The VM is paused
+Add/remove CPUs to/from the VM     | `/vm.resize`        | `/schemas/VmResize`       | N/A                      | The VM is booted
+Remove memory from the VM          | `/vm.resize`        | `/schemas/VmResize`       | N/A                      | The VM is booted
+Dump the VM information            | `/vm.info`          | N/A                       | `/schemas/VmInfo`        | The VM is created
+Add VFIO PCI device to the VM      | `/vm.add-device`    | `/schemas/VmAddDevice`    | `/schemas/PciDeviceInfo` | The VM is booted
+Add disk device to the VM          | `/vm.add-disk`      | `/schemas/DiskConfig`     | `/schemas/PciDeviceInfo` | The VM is booted
+Add fs device to the VM            | `/vm.add-fs`        | `/schemas/FsConfig`       | `/schemas/PciDeviceInfo` | The VM is booted
+Add pmem device to the VM          | `/vm.add-pmem`      | `/schemas/PmemConfig`     | `/schemas/PciDeviceInfo` | The VM is booted
+Add network device to the VM       | `/vm.add-net`       | `/schemas/NetConfig`      | `/schemas/PciDeviceInfo` | The VM is booted
+Add vsock device to the VM         | `/vm.add-vsock`     | `/schemas/VsockConfig`    | `/schemas/PciDeviceInfo` | The VM is booted
+Remove device from the VM          | `/vm.remove-device` | `/schemas/VmRemoveDevice` | N/A                      | The VM is booted
+Dump the VM counters               | `/vm.counters`      | N/A                       | `/schemas/VmCounters`    | The VM is booted

 ### REST API Examples

@@ -121,10 +122,10 @@ We want to create a virtual machine with the following characteristics:
 * 4 vCPUs
 * 1 GB of RAM
 * 1 virtio based networking interface
-* Direct kernel boot from a custom 5.5.0 Linux kernel located at
+* Direct kernel boot from a custom 5.6.0-rc4 Linux kernel located at
  `/opt/clh/kernel/vmlinux-virtio-fs-virtio-iommu`
-* Using a Clear Linux image as its root filesystem, located at
-  `/opt/clh/images/clear-30080-kvm.img`
+* Using a Ubuntu image as its root filesystem, located at
+  `/opt/clh/images/focal-server-cloudimg-amd64.raw`

 ```shell
 #!/bin/bash
@@ -136,8 +137,8 @@ curl --unix-socket /tmp/cloud-hypervisor.sock -i \
     -d '{
         "cpus":{"boot_vcpus": 4, "max_vcpus": 4},
         "kernel":{"path":"/opt/clh/kernel/vmlinux-virtio-fs-virtio-iommu"},
-         "cmdline":{"args":"console=hvc0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda3"},
-         "disks":[{"path":"/opt/clh/images/clear-30080-kvm.img"}],
+         "cmdline":{"args":"console=ttyS0 console=hvc0 root=/dev/vda1 rw"},
+         "disks":[{"path":"/opt/clh/images/focal-server-cloudimg-amd64.raw"}],
         "rng":{"src":"/dev/urandom"},
         "net":[{"ip":"192.168.10.10", "mask":"255.255.255.0", "mac":"12:34:56:78:90:01"}]
         }'
@@ -304,8 +305,8 @@ APIs work together, let's look at a complete VM creation flow, from the
 		-d '{
 			"cpus":{"boot_vcpus": 4, "max_vcpus": 4},
 			"kernel":{"path":"/opt/clh/kernel/vmlinux-virtio-fs-virtio-iommu"},
-			"cmdline":{"args":"console=hvc0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda3"},
-			"disks":[{"path":"/opt/clh/images/clear-30080-kvm.img"}],
+			"cmdline":{"args":"console=ttyS0 console=hvc0 root=/dev/vda1 rw"},
+			"disks":[{"path":"/opt/clh/images/focal-server-cloudimg-amd64.raw"}],
 			"rng":{"src":"/dev/urandom"},
 			"net":[{"ip":"192.168.10.10", "mask":"255.255.255.0", "mac":"12:34:56:78:90:01"}]
 			}'
--- a/docs/arm64.md
+++ b/docs/arm64.md
@@ -1,11 +1,11 @@
-# How to build and run Cloud-hypervisor on Arm64
+# How to build and run Cloud-hypervisor on AArch64

 Cloud-hypervisor is partially enabled on AArch64 architecture.
-Although all features are not ready yet, you can begin to test Cloud-hypervisor on a Arm64 host by following this guide.
+Although all features are not ready yet, you can begin to test Cloud-hypervisor on a AArch64 host by following this guide.

 ## Prerequisites

-On Arm64 machines, Cloud-hypervisor depends on an external library `libfdt-dev` for generating Flatted Device Tree (FDT).
+On AArch64 machines, Cloud-hypervisor depends on an external library `libfdt-dev` for generating Flattened Device Tree (FDT).

 The long-term plan is to replace `libfdt-dev` with some pure-Rust component to get rid of such dependency.

@@ -16,16 +16,20 @@ sudo apt-get install libfdt-dev

 ## Build

-Before building, a hack trick need to be performed to get rid of some build error in vmm component. See [this](https://github.com/cloud-hypervisor/kvm-bindings/pull/1) for more info about this temporary workaround.
+For Virtio devices, you can choose MMIO or PCI as transport option.
+
+### MMIO

 ```bash
-sed -i 's/"with-serde",\ //g' vmm/Cargo.toml
+cargo build --no-default-features --features mmio,kvm
 ```

-The support of AArch64 is in very early stage, only Virtio devices with MMIO tranport is available.
+### PCI
+
+Using PCI devices requires GICv3-ITS for MSI messaging. GICv3-ITS is very common in modern servers, but your machine happen to be old ones with GICv2(M) (like Raspberry Pi 4) or GICv3 without ITS, MMIO can still work.

 ```bash
-cargo build --no-default-features --features "mmio"
+cargo build --no-default-features --features pci,kvm
 ```

 ## Image
@@ -33,7 +37,7 @@ cargo build --no-default-features --features "mmio"
 Download kernel binary and rootfs image from AWS.

 ```bash
-wget https://s3.amazonaws.com/spec.ccfc.min/img/aarch64/ubuntu_with_ssh/fsfiles/xenial.rootfs.ext4 -O rootfs.img
+wget https://s3.amazonaws.com/spec.ccfc.min/img/aarch64/ubuntu_with_ssh/fsfiles/xenial.rootfs.ext4 -O rootfs.ext4
 wget https://s3.amazonaws.com/spec.ccfc.min/img/aarch64/ubuntu_with_ssh/kernel/vmlinux.bin -O kernel.bin
 ```

@@ -47,7 +51,7 @@ To build the development container:
 ./scripts/dev_cli.sh build-container
 ```

-To build Cloud-hypervisor in the container:
+To build Cloud-hypervisor in the container: (The default option for Virtio transport is MMIO.)

 ```bash
 ./scripts/dev_cli.sh build
@@ -58,7 +62,7 @@ To build Cloud-hypervisor in the container:
 Assuming you have built Cloud-hypervisor with the development container, a VM can be started with command:

 ```bash
-sudo target/debug/cloud-hypervisor --kernel kernel.bin --disk path=rootfs.ext4 --cmdline "keep_bootcon console=hvc0 reboot=k panic=1 pci=off root=/dev/vda rw" --cpus boot=4 --memory size=512M --seccomp false --serial file=serial.log --log-file log.log -vvv
+sudo build/cargo_target/aarch64-unknown-linux-gnu/debug/cloud-hypervisor --kernel kernel.bin --disk path=rootfs.ext4 --cmdline "keep_bootcon console=hvc0 reboot=k panic=1 pci=off root=/dev/vda rw" --cpus boot=4 --memory size=512M --serial file=serial.log --log-file log.log -vvv
 ```

-If the build was done out of the container, replace the binary path with `build/cargo_target/aarch64-unknown-linux-gnu/debug/cloud-hypervisor`.
+If the build was done out of the container, replace the binary path with `target/debug/cloud-hypervisor`.
--- a/docs/custom-image.md
+++ b/docs/custom-image.md
@@ -1,96 +1,136 @@
-# How to create a custom Clear Linux image
+# How to create a custom Ubuntu image

-In the context of adding more utility to the cloudguest image being used
-for integration testing, this is a quick guide on how to achieve the creation
-of your own Clear Linux image using the official Clear Linux tooling.
-
-## Prepare the environment
-
-From the host, the goal is run a Clear Linux VM that will allow us to build
-the custom image we want.
-
-```bash
-# Get latest CL version:
-IMG_VERSION=$(curl https://download.clearlinux.org/latest)
-# Get latest clear-kvm image:
-wget -P $HOME/workloads/ https://download.clearlinux.org/current/clear-${IMG_VERSION}-kvm.img.xz
-# Extract the image
-unxz $HOME/workloads/clear-${IMG_VERSION}-kvm.img.xz
-# Make sure cloud-hypervisor binary has CAP_NET_ADMIN capability set
-sudo setcap cap_net_admin+ep cloud-hypervisor
-# Boot cloud-hypervisor VM with the downloaded image
-./cloud-hypervisor -v --kernel $HOME/workloads/vmlinux --disk path=clear-${IMG_VERSION}-kvm.img --cmdline "console=ttyS0 console=hvc0 reboot=k panic=1 nomodules root=/dev/vda3 rw" --cpus 1 --memory size=4G --net tap=,mac=
-# Setup connectivity
-# First make sure to enable IP forwarding (disabled on Linux by default)
-sudo bash -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
-# Retrieve the interface name and the gateway IP
-IFACE=$(ip route | grep default | awk -F 'dev' '{print $2}' | awk -F ' ' '{print $1}')
-GW=$(ip route | grep vmtap0 | awk -F ' ' '{print $1}')
-# Create a new masquerade rule to tag the packets going out
-sudo iptables -t nat -A POSTROUTING -s ${GW} -o ${IFACE} -j MASQUERADE
-```
+In the context of adding more utilities to the Ubuntu cloud image being used
+for integration testing, this quick guide details how to achieve the proper
+modification of an official Ubuntu cloud image.

 ## Create the image

-From the guest, we can now create the image.
+Let's go through the steps on how to extend an official Ubuntu image. These
+steps can be applied to other distributions (with a few changes regarding
+package management).
+
+### Get latest Ubuntu cloud image

 ```bash
-# Setup connectivity
-sudo ip addr add 192.168.249.2/24 dev enp0s3
-sudo ip route add default via 192.168.249.1
-# Install necessary bundles
-sudo swupd bundle-add clr-installer
-sudo swupd bundle-add os-installer
-# Download and update cloudguest image configuration
-wget https://download.clearlinux.org/current/config/image/cloudguest.yaml
-sed -i '/size: \"864M\"/d' cloudguest.yaml
-sed -i 's/\"800M\"/\"2G\"/g' cloudguest.yaml
-sed -i 's/bootloader,/bootloader,\n    curl,\n    iperf,/g' cloudguest.yaml
-sed -i 's/systemd-networkd-autostart/sysadmin-basic,\n    systemd-networkd-autostart/g' cloudguest.yaml
-# Create the custom cloudguest image
-clr-installer -c cloudguest.yaml
-# Make the guest accessible through ssh
-sudo mkdir -p /etc/ssh
-sudo bash -c "echo 'PermitRootLogin yes' >> /etc/ssh/sshd_config"
+wget https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img
 ```

-### Retrieve the image
-
-Once the new image has been created and the guest is accessible through
-`ssh`, it is time to retrieve the image from the host.
+### Check the file format is QCOW2

 ```bash
-# Retrieve new image (this is a raw image)
-scp root@192.168.249.2:cloudguest.img .
-mv cloudguest.img clear-cloudguest-raw.img
-# Create the QCOW image from the RAW image
-qemu-img convert -p -f raw -O qcow2 clear-cloudguest-raw.img clear-cloudguest.img
-# Compress the QCOW image
-xz -k -T $(nproc) clear-cloudguest.img
+file focal-server-cloudimg-amd64.img
+focal-server-cloudimg-amd64.img: QEMU QCOW2 Image (v2), 2361393152 bytes
+```
+
+### Convert QCOW2 into RAW
+
+```bash
+qemu-img convert -p -f qcow2 -O raw focal-server-cloudimg-amd64.img focal-server-cloudimg-amd64.raw
+```
+
+### Identify the Linux partition
+
+The goal is to mount the image rootfs so that it can be modified as needed.
+That's why we need to identify where the Linux filesystem partition is located
+in the image.
+
+```bash
+sudo fdisk -l focal-server-cloudimg-amd64.raw
+Disk focal-server-cloudimg-amd64.raw: 2.2 GiB, 2361393152 bytes, 4612096 sectors
+Units: sectors of 1 * 512 = 512 bytes
+Sector size (logical/physical): 512 bytes / 512 bytes
+I/O size (minimum/optimal): 512 bytes / 512 bytes
+Disklabel type: gpt
+Disk identifier: A1171ABA-2BEA-4218-A467-1B2B607E5953
+
+Device                             Start     End Sectors  Size Type
+focal-server-cloudimg-amd64.raw1  227328 4612062 4384735  2.1G Linux filesystem
+focal-server-cloudimg-amd64.raw14   2048   10239    8192    4M BIOS boot
+focal-server-cloudimg-amd64.raw15  10240  227327  217088  106M EFI System
+
+Partition table entries are not in disk order.
+```
+
+### Mount the Linux partition
+
+```bash
+mkdir -p /mnt
+sudo mount -o loop,offset=$((227328 * 512)) focal-server-cloudimg-amd64.raw /mnt
+```
+
+### Change root directory
+
+Changing the root directory will allow us to install new packages to the rootfs
+contained by the cloud image.
+
+```bash
+sudo chroot /mnt
+mount -t proc proc /proc
+mount -t devpts devpts /dev/pts
+```
+
+### Install needed packages
+
+In the context Cloud-Hypervisor's integration tests, we need several utilities.
+Here is the way to install them for a Ubuntu image. This step is specific to
+Ubuntu distributions.
+
+```bash
+apt update
+apt install fio iperf iperf3 socat
+```
+
+### Remove snapd
+
+This prevents snapd from trying to mount squashfs filesystem when the kernel
+might not support it. This might be the case when the image is used with direct
+kernel boot. This step is specific to Ubuntu distributions.
+
+```bash
+apt remove --purge snapd
+```
+
+### Cleanup the image
+
+Leave no trace in the image before unmounting its content.
+
+```bash
+umount /dev/pts
+umount /proc
+history -c
+exit
+umount /mnt
+```
+
+### Rename the image
+
+Renaming is important to identify this is a modified image.
+
+```bash
+mv focal-server-cloudimg-amd64.raw focal-server-cloudimg-amd64-custom.raw
+```
+
+### Create QCOW2 from RAW
+
+Last step is to create the QCOW2 image back from the modified image.
+
+```bash
+qemu-img convert -p -f raw -O qcow2 focal-server-cloudimg-amd64-custom.raw focal-server-cloudimg-amd64-custom.qcow2
 ```

 ## Switch CI to use the new image

 ### Upload to Azure storage

-The next step is to update the image stored as part of the Azure storage
-account, replacing it with the newly created image. This will make this
-new image available from the integration tests.
-This is usually achieved through the web interface.
+The next step is to update both images (QCOW2 and RAW) stored as part of the
+Azure storage account, replacing them with the newly created ones. This will
+make these new images available from the integration tests. This is usually
+achieved through the web interface.

 ### Update integration tests

 Last step is about updating the integration tests to work with this new image.
-The key point is to identify the UUID of this new image so that it can be used
-directly from the tests.
-
-Proceed as follow to determine this UUID:
-
-```bash
-# Mount the image
-sudo mount -o loop,offset=$((2048 * 512)) clear-cloudguest-raw.img /mnt/
-# Identify UUID
-sudo cat /mnt/loader/entries/Clear-linux-kvm-*.conf | grep "root=PARTUUID="
-# Unmount the image
-sudo umount /mnt
-```
+The key point is to identify where the Linux filesystem partition is located,
+as we might need to update the direct kernel boot command line, replacing
+`/dev/vda1` with the appropriate partition number.
--- a/docs/debug-port.md
+++ b/docs/debug-port.md
@@ -43,7 +43,7 @@ to easily grep for the tracing logs (e.g.
 ```
 ./target/debug/cloud-hypervisor \
    --kernel ~/rust-hypervisor-firmware/target/target/release/hypervisor-fw \
-    --disk path=~/hypervisor/images/clear-30080-kvm.img \
+    --disk path=~/hypervisor/images/focal-server-cloudimg-amd64.raw \
    --cpus 4 \
    --memory size=1024M \
    --rng \
--- a/docs/fs.md
+++ b/docs/fs.md
@@ -52,14 +52,14 @@ Direct kernel boot option is preferred since we need to provide the custom kerne

 Because _vhost-user_ expects a dedicated process (__virtiofsd__ in this case) to be able to access the guest RAM to communicate through the _virtqueues_ with the driver running in the guest, `--memory` option needs to be slightly modified. It needs to specify a backing file for the memory so that an external process can access it.

-Assuming you have `clear-kvm.img` and `custom-vmlinux.bin` on your system, here is the __cloud-hypervisor__ command you need to run:
+Assuming you have `focal-server-cloudimg-amd64.raw` and `custom-vmlinux.bin` on your system, here is the __cloud-hypervisor__ command you need to run:
 ```bash
 ./cloud-hypervisor \
    --cpus 4 \
    --memory "size=512,file=/dev/shm" \
-    --disk path=clear-kvm.img \
+    --disk path=focal-server-cloudimg-amd64.raw \
    --kernel custom-vmlinux.bin \
-    --cmdline "console=ttyS0 reboot=k panic=1 nomodules root=/dev/vda3" \
+    --cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw" \
    --fs tag=myfs,socket=/tmp/virtiofs,num_queues=1,queue_size=512
 ```

--- a/docs/fuzzing.md
+++ b/docs/fuzzing.md
@@ -0,0 +1,35 @@
+# Fuzzing in Cloud Hypervisor
+
+Cloud Hypervisor uses [cargo-fuzz](https://github.com/rust-fuzz/cargo-fuzz) for fuzzing individual components.
+
+The fuzzers are are in the `fuzz/fuzz_targets` directory
+
+## Preparation
+
+Switch to nightly: 
+
+````
+rustup override set nightly
+````
+
+Install `cargo fuzz`: 
+
+```
+cargo install cargo-fuzz
+```
+
+## Running the fuzzers
+
+e.g. To run the `qcow` fuzzer using all available CPUs:
+
+```
+cargo fuzz run qcow -j `nproc`
+```
+
+## Adding a new fuzzer
+
+```
+cargo fuzz add <new_fuzzer>
+```
+
+Inspiration for fuzzers can be found in [crosvm](https://chromium.googlesource.com/chromiumos/platform/crosvm/+/refs/heads/master/fuzz/)
--- a/docs/hotplug.md
+++ b/docs/hotplug.md
@@ -5,9 +5,7 @@ Currently Cloud Hypervisor only support hot plugging of CPU devices.
 ## Kernel support

 For hotplug on Cloud Hypervisor ACPI GED support is needed. This can either be achieved by turning on `CONFIG_ACPI_REDUCED_HARDWARE_ONLY` 
-or by using this kernel patch (available in 5.5rc1 and later): https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/drivers/acpi/Makefile?id=ac36d37e943635fc072e9d4f47e40a48fbcdb3f0
-
-This patch is integrated into the Clear Linux KVM and cloudguest images.
+or by using this kernel patch (available in 5.5-rc1 and later): https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/drivers/acpi/Makefile?id=ac36d37e943635fc072e9d4f47e40a48fbcdb3f0

 ## CPU Hot Plug

@@ -22,8 +20,9 @@ To use CPU hotplug start the VM with the number of max vCPUs greater than the nu
 $ pushd $CLOUDH
 $ sudo setcap cap_net_admin+ep ./cloud-hypervisor/target/release/cloud-hypervisor
 $ ./cloud-hypervisor/target/release/cloud-hypervisor \
-	--kernel ./hypervisor-fw \
-	--disk path=clear-31890-kvm.img \
+	--kernel custom-vmlinux.bin \
+	--cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw" \
+	--disk path=focal-server-cloudimg-amd64.raw \
 	--cpus boot=4,max=8 \
 	--memory size=1024M \
 	--net "tap=,mac=,ip=,mask=" \
@@ -75,8 +74,9 @@ To use memory hotplug start the VM specifying some size RAM in the "hotplug_size
 $ pushd $CLOUDH
 $ sudo setcap cap_net_admin+ep ./cloud-hypervisor/target/release/cloud-hypervisor
 $ ./cloud-hypervisor/target/release/cloud-hypervisor \
-	--kernel ./hypervisor-fw \
-	--disk path=clear-31890-kvm.img \
+	--kernel custom-vmlinux.bin \
+	--cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw" \
+	--disk path=focal-server-cloudimg-amd64.raw \
 	--cpus boot=4,max=8 \
 	--memory size=1024M,hotplug_size=8192M \
 	--net "tap=,mac=,ip=,mask=" \
@@ -110,4 +110,4 @@ Due to guest OS limitations is is necessary to ensure that amount of memory adde

 The same API can also be used to reduce the desired RAM for a VM but the change will not be applied until the VM is rebooted.

-Memory and CPU resizing can be combined together into the same HTTP API request.
+Memory and CPU resizing can be combined together into the same HTTP API request.
--- a/docs/intel_sgx.md
+++ b/docs/intel_sgx.md
@@ -0,0 +1,55 @@
+# Intel SGX
+
+Intel® Software Guard Extensions (Intel® SGX) is an Intel technology designed
+to increase the security of application code and data. Cloud-Hypervisor supports
+SGX virtualization through KVM. Because SGX is built on hardware features that
+cannot be emulated in software, virtualizing SGX requires support in KVM and in
+the host kernel. The required Linux and KVM changes can be found in the
+[KVM SGX Tree](https://github.com/intel/kvm-sgx).
+
+Utilizing SGX in the guest requires a kernel/OS with SGX support, e.g. a kernel
+buit using the [SGX Linux Development Tree](https://github.com/jsakkine-intel/linux-sgx.git)
+or the [KVM SGX Tree](https://github.com/intel/kvm-sgx). Running KVM SGX as the
+guest kernel allows nested virtualization of SGX.
+
+For more information about SGX, please refer to the [SGX Homepage](https://software.intel.com/sgx).
+
+For more information about SGX SDK and how to test SGX, please refer to the
+following [instructions](https://github.com/intel/linux-sgx).
+
+## Cloud-Hypervisor support
+
+Assuming the host exposes `/dev/sgx/virt_epc`, we can pass SGX enclaves through
+the guest.
+
+In order to use SGX enclaves within a Cloud-Hypervisor VM, we must define one
+or several Enclave Page Cache (EPC) sections. Here is an example of a VM being
+created with 2 EPC sections, the first one being 64MiB with pre-allocated
+memory, the second one being 32MiB with no pre-allocated memory.
+
+```bash
+./cloud-hypervisor \
+    --cpus boot=1 \
+    --memory size=1G \
+    --disk path=focal-server-cloudimg-amd64.raw \
+    --kernel bzImage \
+    --cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw" \
+    --sgx-epc size=64M,prefault=on size=32M,prefault=off
+```
+
+Once booted, and assuming your guest kernel contains the patches from the
+[KVM SGX Tree](https://github.com/intel/kvm-sgx), you can validate SGX devices
+have been correctly created under `/dev/sgx`:
+
+```bash
+ls /dev/sgx
+enclave provision virt_epc
+```
+
+From this point, it is possible to run any SGX application from the guest, as
+it will access `/dev/sgx/enclave` device to create dedicated SGX enclaves.
+
+Note: There is only one contiguous SGX EPC region, which contains all SGX EPC
+sections. This region is exposed through ACPI and marked as reserved through
+the e820 table. It is treated yet as another device, which means it should
+appear at the end of the guest address space.
--- a/docs/iommu.md
+++ b/docs/iommu.md
@@ -88,9 +88,9 @@ virtual IOMMU:
 ./cloud-hypervisor \
    --cpus 1 \
    --memory size=512M \
-    --disk path=clear-kvm.img,iommu=on \
+    --disk path=focal-server-cloudimg-amd64.raw,iommu=on \
    --kernel custom-bzImage \
-    --cmdline "console=ttyS0 root=/dev/vda3" \
+    --cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw" \
 ```

 From a guest perspective, it is easy to verify if the device is protected by
@@ -165,9 +165,9 @@ be consumed.
 ./cloud-hypervisor \
    --cpus 1 \
    --memory size=8G,file=/dev/hugepages \
-    --disk path=clear-kvm.img \
+    --disk path=focal-server-cloudimg-amd64.raw \
    --kernel custom-bzImage \
-    --cmdline "console=ttyS0 root=/dev/vda3 hugepagesz=2M hugepages=2048" \
+    --cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw hugepagesz=2M hugepages=2048" \
    --net tap=,mac=,iommu=on
 ```

@@ -182,9 +182,9 @@ passing through is `0000:00:01.0`.
 ./cloud-hypervisor \
    --cpus 1 \
    --memory size=8G,file=/dev/hugepages \
-    --disk path=clear-kvm.img \
+    --disk path=focal-server-cloudimg-amd64.raw \
    --kernel custom-bzImage \
-    --cmdline "console=ttyS0 root=/dev/vda3 kvm-intel.nested=1 vfio_iommu_type1.allow_unsafe_interrupts rw hugepagesz=2M hugepages=2048" \
+    --cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw kvm-intel.nested=1 vfio_iommu_type1.allow_unsafe_interrupts rw hugepagesz=2M hugepages=2048" \
    --device path=/sys/bus/pci/devices/0000:00:01.0,iommu=on
 ```

@@ -202,8 +202,8 @@ Last thing is to start the L2 guest with the huge pages memory backend.
 ./cloud-hypervisor \
    --cpus 1 \
    --memory size=4G,file=/dev/hugepages \
-    --disk path=clear-kvm.img \
+    --disk path=focal-server-cloudimg-amd64.raw \
    --kernel custom-bzImage \
-    --cmdline "console=ttyS0 root=/dev/vda3" \
+    --cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw" \
    --device path=/sys/bus/pci/devices/0000:00:04.0
 ```
--- a/docs/networking.md
+++ b/docs/networking.md
@@ -25,9 +25,9 @@ Use one `--net` command-line argument from cloud-hypervisor to specify the emula
 ./cloud-hypervisor \
    --cpus 4 \
    --memory "size=512M" \
-    --disk path=my-root-disk.img \
+    --disk path=focal-server-cloudimg-amd64.raw \
    --kernel my-vmlinux.bin \
-    --cmdline "console=ttyS0 reboot=k panic=1 nomodules root=/dev/vda3" \
+    --cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw" \
    --net tap=ich0,mac=a4:a1:c2:00:00:01,ip=192.168.4.2,mask=255.255.255.0,num_queues=2,queue_size=256 \
          tap=ich1,mac=a4:a1:c2:00:00:02,ip=10.0.1.2,mask=255.255.255.0,num_queues=2,queue_size=256
 ```
--- a/docs/snapshot_restore.md
+++ b/docs/snapshot_restore.md
@@ -0,0 +1,112 @@
+# Snapshot and Restore
+
+The goal for the snapshot/restore feature is to provide the user with the
+ability to take a snapshot of a previously paused virtual machine. This
+snapshot can be used as the base for creating new identical virtual machines,
+without the need to boot them from scratch. The restore codepath takes the
+snapshot and creates the exact same virtual machine, restoring the previously
+saved states. The new virtual machine is restored in a paused state, as it was
+before the snapshot was performed.
+
+This feature is important for the project as it establishes the first step
+towards the support for live migration.
+
+## Snapshot a Cloud-Hypervisor VM
+
+First thing, we must run a Cloud-Hypervisor VM:
+
+```bash
+./cloud-hypervisor \
+    --api-socket /tmp/cloud-hypervisor.sock \
+    --cpus boot=4 \
+    --memory size=4G \
+    --kernel bzImage \
+    --cmdline "root=/dev/vda1 console=hvc0 rw" \
+    --disk path=focal-server-cloudimg-amd64.raw
+```
+
+At any point in time when the VM is running, one might choose to pause it:
+
+```bash
+./ch-remote --api-socket=/tmp/cloud-hypervisor.sock pause
+```
+
+Once paused, the VM can be safely snapshot into the specified directory and
+using the following command:
+
+```bash
+./ch-remote --api-socket=/tmp/cloud-hypervisor.sock snapshot file:///home/foo/snapshot
+```
+
+Given the directory was present on the system, the snapshot will succeed and
+it should contain the following files:
+
+```bash
+ll /home/foo/snapshot/
+total 4194536
+drwxrwxr-x  2 foo bar       4096 Jul 22 11:50 ./
+drwxr-xr-x 47 foo bar       4096 Jul 22 11:47 ../
+-rw-------  1 foo bar 3221225472 Jul 22 11:19 memory-region-0
+-rw-------  1 foo bar 1073741824 Jul 22 11:19 memory-region-1
+-rw-------  1 foo bar     217853 Jul 22 11:19 vm.json
+```
+
+In this particular example, we can observe that 2 memory region files were
+created. That is explained by the size of the guest RAM, which is 4GiB in this
+case. Because it exceeds 3GiB (which is where we can find a ~1GiB memory hole),
+Cloud-Hypervisor needs 2 distincts memory regions to be created. Each memory
+region's content is stored through a dedicated file, which explains why we end
+up with 2 different files, the first one containing the guest RAM range 0-3GiB
+and the second one containing the guest RAM range 3-4GiB.
+
+`vm.json` gathers all information related to the virtual machine configuration
+and state. The configuration bits are used to create a similar virtual machine
+with the correct amount of CPUs, RAM, and other expected devices. The state
+bits are used to restore each component in the state it was left before the
+snapshot occured.
+
+## Restore a Cloud-Hypervisor VM
+
+Given that one has access to an existing snapshot in `/home/foo/snapshot`,
+it is possible to create a new VM based on this snapshot with the following 
+command:
+
+```bash
+./cloud-hypervisor \
+    --api-socket /tmp/cloud-hypervisor.sock \
+    --restore source_url=file:///home/foo/snapshot
+```
+
+Or using two different commands from two terminals:
+
+```bash
+# First terminal
+./cloud-hypervisor --api-socket /tmp/cloud-hypervisor.sock
+
+# Second terminal
+./ch-remote --api-socket=/tmp/cloud-hypervisor.sock restore source_url=file:///home/foo/snapshot
+```
+
+Remember the VM is restored in a `paused` state, which was the VM's state when
+it was snapshot. For this reason, one must explicitly `resume` the VM before to
+start using it.
+
+```bash
+./ch-remote --api-socket=/tmp/cloud-hypervisor.sock resume
+```
+
+At this point, the VM is fully restored and is identical to the VM which was
+snapshot earlier.
+
+## Limitations
+
+The support of snapshot/restore feature is still experimental, meaning one
+might still find some bugs associated with it.
+
+Additionally, some devices and features don't support to be snapshot and
+restored yet:
+- `vhost-user` devices
+- `virtio-mem`
+- Intel SGX
+
+VFIO devices are out of scope.
--- a/docs/vfio.md
+++ b/docs/vfio.md
@@ -66,10 +66,10 @@ takes the device's sysfs path as an argument. In our example it is
 ```
 ./target/debug/cloud-hypervisor \
    --kernel ~/vmlinux \
-    --disk path=~/clear-29160-kvm.img \
+    --disk path=~/focal-server-cloudimg-amd64.raw \
    --console off \
    --serial tty \
-    --cmdline "console=ttyS0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda3" \
+    --cmdline "console=ttyS0 root=/dev/vda1 rw" \
    --cpus 4 \
    --memory size=512M \
    --device path=/sys/bus/pci/devices/0000:01:00.0/
--- a/docs/vhost-user-blk-testing.md
+++ b/docs/vhost-user-blk-testing.md
@@ -73,10 +73,10 @@ VMs run in client mode. They connect to the socket created by the `dpdkvhostuser
 # From the test terminal. We need to create one vhost-user-blk device for the --disk.
 ./cloud-hypervisor \
        --cpus boot=4 \
-        --memory size=1024M,file=/dev/hugepages \
+        --memory size=1024M,hugepages=on \
        --kernel linux/arch/x86/boot/compressed/vmlinux.bin \
-        --cmdline "console=ttyS0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda3 iommu=off" \
-        --disk "path=images/clear-kvm.img" "num_queues=4,queue_size=128,vhost_user=true,socket=/var/tmp/vhost.1" \
+        --cmdline "console=ttyS0 root=/dev/vda1 rw iommu=off" \
+        --disk path=images/focal-server-cloudimg-amd64.raw vhost_user=true,socket=/var/tmp/vhost.1,num_queues=4,queue_size=128 \
        --console off \
        --serial tty \
        --rng
@@ -88,11 +88,11 @@ login in guest

 # Use lsblk command to find out vhost-user-blk device
 lsblk
-NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
-vda    253:0    0  8.5G  0 disk
-├─vda1 253:1    0  511M  0 part
-├─vda2 253:2    0   32M  0 part [SWAP]
-└─vda3 253:3    0    8G  0 part /
+NAME    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
+vda     252:0    0  2.2G  0 disk 
+├─vda1  252:1    0  2.1G  0 part /
+├─vda14 252:14   0    4M  0 part 
+└─vda15 252:15   0  106M  0 part /boot/efi
 vdb    253:16   0  512M  0 disk

 The vhost-user-blk device is /dev/vdb
--- a/docs/vhost-user-net-testing.md
+++ b/docs/vhost-user-net-testing.md
@@ -76,19 +76,19 @@ VMs run in client mode. They connect to the socket created by the `dpdkvhostuser
 # From one terminal. We need to give the cloud-hypervisor binary the NET_ADMIN capabilities for it to set TAP interfaces up on the host.
 ./cloud-hypervisor \
        --cpus boot=2 \
-        --memory size=512M,file=/dev/hugepages   \
+        --memory size=512M,hugepages=on   \
        --kernel vmlinux \
-        --cmdline "reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda3" \
-        --disk path=clear-kvm.img   \
-        --net "mac=52:54:00:02:d9:01,vhost_user=true,socket=/var/run/openvswitch/vhost-user1,num_queues=4"
+        --cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw" \
+        --disk path=focal-server-cloudimg-amd64.raw   \
+        --net mac=52:54:00:02:d9:01,vhost_user=true,socket=/var/run/openvswitch/vhost-user1,num_queues=4

 # From another terminal. We need to give the cloud-hypervisor binary the NET_ADMIN capabilities for it to set TAP interfaces up on the host.
 ./cloud-hypervisor \
        --cpus boot=2 \
-        --memory size=512M,file=/dev/hugepages   \
+        --memory size=512M,hugepages=on   \
        --kernel vmlinux \
-        --cmdline "reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda3" \
-        --disk path=clear-kvm.img   \
+        --cmdline "console=ttyS0 console=hvc0 root=/dev/vda1 rw" \
+        --disk path=focal-server-cloudimg-amd64.raw   \
        --net "mac=52:54:20:11:C5:02,vhost_user=true,socket=/var/run/openvswitch/vhost-user2,num_queues=4"
 ```

--- a/fuzz/.gitignore
+++ b/fuzz/.gitignore
@@ -0,0 +1,4 @@
+
+target
+corpus
+artifacts
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -0,0 +1,41 @@
+
+[package]
+name = "cloud-hypervisor-fuzz"
+version = "0.0.0"
+authors = ["Automatically generated"]
+publish = false
+edition = "2018"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libc = "0.2.72"
+libfuzzer-sys = "0.3"
+qcow = { path = "../qcow" }
+virtio-devices = { path = "../virtio-devices" }
+vmm-sys-util = ">=0.3.1"
+vm-virtio = { path = "../vm-virtio" }
+vm-memory = "0.2.1"
+
+[dependencies.cloud-hypervisor]
+path = ".."
+
+[patch.crates-io]
+vm-memory = { git = "https://github.com/cloud-hypervisor/vm-memory", branch = "ch" }
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[[bin]]
+name = "qcow"
+path = "fuzz_targets/qcow.rs"
+test = false
+doc = false
+
+[[bin]]
+name = "block"
+path = "fuzz_targets/block.rs"
+test = false
+doc = false
--- a/fuzz/fuzz_targets/block.rs
+++ b/fuzz/fuzz_targets/block.rs
@@ -0,0 +1,136 @@
+// Copyright 2018 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#![no_main]
+
+use libfuzzer_sys::fuzz_target;
+use std::ffi;
+use std::fs::File;
+use std::io::{self, Cursor, Read, Seek, SeekFrom};
+use std::mem::size_of;
+use std::os::unix::io::{AsRawFd, FromRawFd, RawFd};
+use std::path::PathBuf;
+use std::sync::Arc;
+use virtio_devices::{Block, VirtioDevice, VirtioInterrupt, VirtioInterruptType};
+use vm_memory::{Bytes, GuestAddress, GuestMemoryAtomic, GuestMemoryMmap};
+use vm_virtio::Queue;
+use vmm_sys_util::eventfd::EventFd;
+
+const MEM_SIZE: u64 = 256 * 1024 * 1024;
+const DESC_SIZE: u64 = 16; // Bytes in one virtio descriptor.
+const QUEUE_SIZE: u16 = 16; // Max entries in the queue.
+const CMD_SIZE: usize = 16; // Bytes in the command.
+
+fuzz_target!(|bytes| {
+    let size_u64 = size_of::<u64>();
+    let mem = GuestMemoryMmap::from_ranges(&[(GuestAddress(0), MEM_SIZE as usize)]).unwrap();
+
+    // The fuzz data is interpreted as:
+    // starting index 8 bytes
+    // command location 8 bytes
+    // command 16 bytes
+    // descriptors circular buffer 16 bytes * 3
+    if bytes.len() < 4 * size_u64 {
+        // Need an index to start.
+        return;
+    }
+
+    let mut data_image = Cursor::new(bytes);
+
+    let first_index = read_u64(&mut data_image);
+    if first_index > MEM_SIZE / DESC_SIZE {
+        return;
+    }
+    let first_offset = first_index * DESC_SIZE;
+    if first_offset as usize + size_u64 > bytes.len() {
+        return;
+    }
+
+    let command_addr = read_u64(&mut data_image);
+    if command_addr > MEM_SIZE - CMD_SIZE as u64 {
+        return;
+    }
+    if mem
+        .write_slice(
+            &bytes[2 * size_u64..(2 * size_u64) + CMD_SIZE],
+            GuestAddress(command_addr as u64),
+        )
+        .is_err()
+    {
+        return;
+    }
+
+    data_image.seek(SeekFrom::Start(first_offset)).unwrap();
+    let desc_table = read_u64(&mut data_image);
+
+    if mem
+        .write_slice(&bytes[32..], GuestAddress(desc_table as u64))
+        .is_err()
+    {
+        return;
+    }
+
+    let mut q = Queue::new(QUEUE_SIZE);
+    q.ready = true;
+    q.size = QUEUE_SIZE / 2;
+    q.max_size = QUEUE_SIZE;
+
+    let queue_evts: Vec<EventFd> = vec![EventFd::new(0).unwrap()];
+    let queue_fd = queue_evts[0].as_raw_fd();
+    let queue_evt = unsafe { EventFd::from_raw_fd(libc::dup(queue_fd)) };
+
+    let shm = memfd_create(&ffi::CString::new("fuzz").unwrap(), 0).unwrap();
+    let disk_file: File = unsafe { File::from_raw_fd(shm) };
+    let raw_img = qcow::RawFile::new(disk_file, false);
+
+    let mut block = Block::new(
+        "tmp".to_owned(),
+        raw_img,
+        PathBuf::from(""),
+        false,
+        false,
+        2,
+        256,
+    )
+    .unwrap();
+
+    block
+        .activate(
+            GuestMemoryAtomic::new(mem),
+            Arc::new(NoopVirtioInterrupt {}),
+            vec![q],
+            queue_evts,
+        )
+        .ok();
+
+    queue_evt.write(77).unwrap(); // Rings the doorbell, any byte will do.
+});
+
+fn read_u64<T: Read>(readable: &mut T) -> u64 {
+    let mut buf = [0u8; size_of::<u64>()];
+    readable.read_exact(&mut buf[..]).unwrap();
+    u64::from_le_bytes(buf)
+}
+
+fn memfd_create(name: &ffi::CStr, flags: u32) -> Result<RawFd, io::Error> {
+    let res = unsafe { libc::syscall(libc::SYS_memfd_create, name.as_ptr(), flags) };
+
+    if res < 0 {
+        Err(io::Error::last_os_error())
+    } else {
+        Ok(res as RawFd)
+    }
+}
+
+pub struct NoopVirtioInterrupt {}
+
+impl VirtioInterrupt for NoopVirtioInterrupt {
+    fn trigger(
+        &self,
+        _int_type: &VirtioInterruptType,
+        _queue: Option<&Queue>,
+    ) -> std::result::Result<(), std::io::Error> {
+        Ok(())
+    }
+}
--- a/fuzz/fuzz_targets/qcow.rs
+++ b/fuzz/fuzz_targets/qcow.rs
@@ -0,0 +1,49 @@
+// Copyright 2018 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE-BSD-3-Clause file.
+
+#![no_main]
+use libfuzzer_sys::fuzz_target;
+use qcow::{QcowFile, RawFile};
+use std::ffi;
+use std::fs::File;
+use std::io::{self, Cursor, Read, Seek, SeekFrom, Write};
+use std::mem::size_of;
+use std::os::unix::io::{FromRawFd, RawFd};
+
+// Take the first 64 bits of data as an address and the next 64 bits as data to
+// store there. The rest of the data is used as a qcow image.
+fuzz_target!(|bytes| {
+    if bytes.len() < 16 {
+        // Need an address and data, each are 8 bytes.
+        return;
+    }
+    let mut disk_image = Cursor::new(bytes);
+    let addr = read_u64(&mut disk_image);
+    let value = read_u64(&mut disk_image);
+    let shm = memfd_create(&ffi::CString::new("fuzz").unwrap(), 0).unwrap();
+    let mut disk_file: File = unsafe { File::from_raw_fd(shm) };
+    disk_file.write_all(&bytes[16..]).unwrap();
+    disk_file.seek(SeekFrom::Start(0)).unwrap();
+    if let Ok(mut qcow) = QcowFile::from(RawFile::new(disk_file, false)) {
+        if qcow.seek(SeekFrom::Start(addr)).is_ok() {
+            let _ = qcow.write_all(&value.to_le_bytes());
+        }
+    }
+});
+
+fn read_u64<T: Read>(readable: &mut T) -> u64 {
+    let mut buf = [0u8; size_of::<u64>()];
+    readable.read_exact(&mut buf[..]).unwrap();
+    u64::from_le_bytes(buf)
+}
+
+fn memfd_create(name: &ffi::CStr, flags: u32) -> Result<RawFd, io::Error> {
+    let res = unsafe { libc::syscall(libc::SYS_memfd_create, name.as_ptr(), flags) };
+
+    if res < 0 {
+        Err(io::Error::last_os_error())
+    } else {
+        Ok(res as RawFd)
+    }
+}
--- a/hypervisor/Cargo.toml
+++ b/hypervisor/Cargo.toml
@@ -0,0 +1,25 @@
+[package]
+name = "hypervisor"
+version = "0.1.0"
+authors = ["Muminul Islam <muislam@microsoft.com>"]
+edition = "2018"
+
+[features]
+kvm = []
+
+[dependencies]
+anyhow = "1.0"
+thiserror = "1.0"
+libc = "0.2.74"
+log = "0.4.11"
+kvm-ioctls = { git = "https://github.com/cloud-hypervisor/kvm-ioctls", branch = "ch" }
+kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch", features = ["with-serde", "fam-wrappers"] }
+serde = {version = ">=1.0.27", features = ["rc"] }
+serde_derive = ">=1.0.27"
+serde_json = ">=1.0.9"
+vm-memory = { version = "0.2.0", features = ["backend-mmap", "backend-atomic"] }
+vmm-sys-util = { version = ">=0.5.0", features = ["with-serde"] }
+
+[dependencies.linux-loader]
+git = "https://github.com/rust-vmm/linux-loader"
+features = ["elf", "bzimage"]
--- a/hypervisor/src/arch/mod.rs
+++ b/hypervisor/src/arch/mod.rs
@@ -0,0 +1,15 @@
+// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+//
+// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE-BSD-3-Clause file.
+//
+// Copyright © 2019 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+//
+// Copyright © 2020, Microsoft Corporation
+//
+
+#[cfg(target_arch = "x86_64")]
+pub mod x86;
--- a/hypervisor/src/arch/x86/mod.rs
+++ b/hypervisor/src/arch/x86/mod.rs
@@ -0,0 +1,36 @@
+// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+//
+// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE-BSD-3-Clause file.
+//
+// Copyright © 2019 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+//
+// Copyright © 2020, Microsoft Corporation
+//
+
+#[allow(non_upper_case_globals)]
+#[allow(non_camel_case_types)]
+#[allow(non_snake_case)]
+#[allow(non_upper_case_globals)]
+#[allow(unused)]
+#[allow(
+    clippy::unreadable_literal,
+    clippy::redundant_static_lifetimes,
+    clippy::trivially_copy_pass_by_ref,
+    clippy::useless_transmute,
+    clippy::should_implement_trait,
+    clippy::transmute_ptr_to_ptr,
+    clippy::unreadable_literal,
+    clippy::redundant_static_lifetimes
+)]
+pub mod msr_index;
+
+// MTRR constants
+pub const MTRR_ENABLE: u64 = 0x800; // IA32_MTRR_DEF_TYPE MSR: E (MTRRs enabled) flag, bit 11
+pub const MTRR_MEM_TYPE_WB: u64 = 0x6;
+
+// IOAPIC pins
+pub const NUM_IOAPIC_PINS: usize = 24;
--- a/hypervisor/src/arch/x86/msr_index.rs
+++ b/hypervisor/src/arch/x86/msr_index.rs
--- a/hypervisor/src/cpu.rs
+++ b/hypervisor/src/cpu.rs
@@ -0,0 +1,312 @@
+// Copyright © 2019 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+//
+// Copyright © 2020, Microsoft Corporation
+//
+// Copyright 2018-2019 CrowdStrike, Inc.
+//
+//
+
+#[cfg(target_arch = "aarch64")]
+use crate::aarch64::VcpuInit;
+use crate::{CpuState, MpState};
+
+#[cfg(target_arch = "x86_64")]
+use crate::x86_64::{
+    CpuId, ExtendedControlRegisters, FpuState, LapicState, MsrEntries, SpecialRegisters,
+    StandardRegisters, VcpuEvents, Xsave,
+};
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+///
+/// Enum for CPU error
+pub enum HypervisorCpuError {
+    ///
+    /// Setting standard registers error
+    ///
+    #[error("Failed to set standard register: {0}")]
+    SetStandardRegs(#[source] anyhow::Error),
+    ///
+    /// Setting standard registers error
+    ///
+    #[error("Failed to get standard registers: {0}")]
+    GetStandardRegs(#[source] anyhow::Error),
+    ///
+    /// Setting special register error
+    ///
+    #[error("Failed to set special registers: {0}")]
+    SetSpecialRegs(#[source] anyhow::Error),
+    ///
+    /// Getting standard register error
+    ///
+    #[error("Failed to get special registers: {0}")]
+    GetSpecialRegs(#[source] anyhow::Error),
+    ///
+    /// Setting floating point registers error
+    ///
+    #[error("Failed to set special register: {0}")]
+    SetFloatingPointRegs(#[source] anyhow::Error),
+    ///
+    /// Getting floating point register error
+    ///
+    #[error("Failed to get special register: {0}")]
+    GetFloatingPointRegs(#[source] anyhow::Error),
+    ///
+    /// Setting Cpuid error
+    ///
+    #[error("Failed to set Cpuid: {0}")]
+    SetCpuid(#[source] anyhow::Error),
+    ///
+    /// Getting Cpuid error
+    ///
+    #[error("Failed to get Cpuid: {0}")]
+    GetCpuid(#[source] anyhow::Error),
+    ///
+    /// Setting lapic state error
+    ///
+    #[error("Failed to set Lapic state: {0}")]
+    SetLapicState(#[source] anyhow::Error),
+    ///
+    /// Getting Lapic state error
+    ///
+    #[error("Failed to get Lapic state: {0}")]
+    GetlapicState(#[source] anyhow::Error),
+    ///
+    /// Setting MSR entries error
+    ///
+    #[error("Failed to set Msr entries: {0}")]
+    SetMsrEntries(#[source] anyhow::Error),
+    ///
+    /// Getting Msr entries error
+    ///
+    #[error("Failed to get Msr entries: {0}")]
+    GetMsrEntries(#[source] anyhow::Error),
+    ///
+    /// Setting MSR entries error
+    ///
+    #[error("Failed to set MP state: {0}")]
+    SetMpState(#[source] anyhow::Error),
+    ///
+    /// Getting Msr entries error
+    ///
+    #[error("Failed to get MP state: {0}")]
+    GetMpState(#[source] anyhow::Error),
+    ///
+    /// Setting Saved Processor Extended States error
+    ///
+    #[error("Failed to set Saved Processor Extended States: {0}")]
+    SetXsaveState(#[source] anyhow::Error),
+    ///
+    /// Getting Saved Processor Extended States error
+    ///
+    #[error("Failed to get Saved Processor Extended States: {0}")]
+    GetXsaveState(#[source] anyhow::Error),
+    ///
+    /// Setting Extended Control Registers error
+    ///
+    #[error("Failed to set Extended Control Registers: {0}")]
+    SetXcsr(#[source] anyhow::Error),
+    ///
+    /// Getting Extended Control Registers error
+    ///
+    #[error("Failed to get Extended Control Registers: {0}")]
+    GetXcsr(#[source] anyhow::Error),
+    ///
+    /// Running Vcpu error
+    ///
+    #[error("Failed to run vcpu: {0}")]
+    RunVcpu(#[source] anyhow::Error),
+    ///
+    /// Getting Vcpu events error
+    ///
+    #[error("Failed to get Vcpu events: {0}")]
+    GetVcpuEvents(#[source] anyhow::Error),
+    ///
+    /// Setting Vcpu events error
+    ///
+    #[error("Failed to set Vcpu events: {0}")]
+    SetVcpuEvents(#[source] anyhow::Error),
+    ///
+    /// Vcpu Init error
+    ///
+    #[error("Failed to init vcpu: {0}")]
+    VcpuInit(#[source] anyhow::Error),
+    ///
+    /// Setting one reg error
+    ///
+    #[error("Failed to init vcpu: {0}")]
+    SetOneReg(#[source] anyhow::Error),
+    ///
+    /// Getting one reg error
+    ///
+    #[error("Failed to init vcpu: {0}")]
+    GetOneReg(#[source] anyhow::Error),
+    ///
+    /// Getting guest clock paused error
+    ///
+    #[error("Failed to notify guest its clock was paused: {0}")]
+    NotifyGuestClockPaused(#[source] anyhow::Error),
+}
+
+#[derive(Debug)]
+pub enum VmExit<'a> {
+    #[cfg(target_arch = "x86_64")]
+    IoOut(u16 /* port */, &'a [u8] /* data */),
+    #[cfg(target_arch = "x86_64")]
+    IoIn(u16 /* port */, &'a mut [u8] /* data */),
+    #[cfg(target_arch = "x86_64")]
+    IoapicEoi(u8 /* vector */),
+    MmioRead(u64 /* address */, &'a mut [u8]),
+    MmioWrite(u64 /* address */, &'a [u8]),
+    Ignore,
+    Reset,
+}
+
+///
+/// Result type for returning from a function
+///
+pub type Result<T> = anyhow::Result<T, HypervisorCpuError>;
+///
+/// Trait to represent a generic Vcpu
+///
+pub trait Vcpu: Send + Sync {
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns the vCPU general purpose registers.
+    ///
+    fn get_regs(&self) -> Result<StandardRegisters>;
+
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Sets the vCPU general purpose registers.
+    ///
+    fn set_regs(&self, regs: &StandardRegisters) -> Result<()>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns the vCPU special registers.
+    ///
+    fn get_sregs(&self) -> Result<SpecialRegisters>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Sets the vCPU special registers
+    ///
+    fn set_sregs(&self, sregs: &SpecialRegisters) -> Result<()>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns the floating point state (FPU) from the vCPU.
+    ///
+    fn get_fpu(&self) -> Result<FpuState>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Set the floating point state (FPU) of a vCPU
+    ///
+    fn set_fpu(&self, fpu: &FpuState) -> Result<()>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call to setup the CPUID registers.
+    ///
+    fn set_cpuid2(&self, cpuid: &CpuId) -> Result<()>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call to retrieve the CPUID registers.
+    ///
+    fn get_cpuid2(&self, num_entries: usize) -> Result<CpuId>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns the state of the LAPIC (Local Advanced Programmable Interrupt Controller).
+    ///
+    fn get_lapic(&self) -> Result<LapicState>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Sets the state of the LAPIC (Local Advanced Programmable Interrupt Controller).
+    ///
+    fn set_lapic(&self, lapic: &LapicState) -> Result<()>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns the model-specific registers (MSR) for this vCPU.
+    ///
+    fn get_msrs(&self, msrs: &mut MsrEntries) -> Result<usize>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Setup the model-specific registers (MSR) for this vCPU.
+    ///
+    fn set_msrs(&self, msrs: &MsrEntries) -> Result<usize>;
+    ///
+    /// Returns the vcpu's current "multiprocessing state".
+    ///
+    fn get_mp_state(&self) -> Result<MpState>;
+    ///
+    /// Sets the vcpu's current "multiprocessing state".
+    ///
+    fn set_mp_state(&self, mp_state: MpState) -> Result<()>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call that returns the vcpu's current "xsave struct".
+    ///
+    fn get_xsave(&self) -> Result<Xsave>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call that sets the vcpu's current "xsave struct".
+    ///
+    fn set_xsave(&self, xsave: &Xsave) -> Result<()>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call that returns the vcpu's current "xcrs".
+    ///
+    fn get_xcrs(&self) -> Result<ExtendedControlRegisters>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call that sets the vcpu's current "xcrs".
+    ///
+    fn set_xcrs(&self, xcrs: &ExtendedControlRegisters) -> Result<()>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns currently pending exceptions, interrupts, and NMIs as well as related
+    /// states of the vcpu.
+    ///
+    fn get_vcpu_events(&self) -> Result<VcpuEvents>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Sets pending exceptions, interrupts, and NMIs as well as related states
+    /// of the vcpu.
+    ///
+    fn set_vcpu_events(&self, events: &VcpuEvents) -> Result<()>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Let the guest know that it has been paused, which prevents from
+    /// potential soft lockups when being resumed.
+    ///
+    fn notify_guest_clock_paused(&self) -> Result<()>;
+    ///
+    /// Sets the type of CPU to be exposed to the guest and optional features.
+    ///
+    #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
+    fn vcpu_init(&self, kvi: &VcpuInit) -> Result<()>;
+    ///
+    /// Sets the value of one register for this vCPU.
+    ///
+    #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
+    fn set_one_reg(&self, reg_id: u64, data: u64) -> Result<()>;
+    ///
+    /// Sets the value of one register for this vCPU.
+    ///
+    #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
+    fn get_one_reg(&self, reg_id: u64) -> Result<u64>;
+    ///
+    /// Retrieve the vCPU state.
+    /// This function is necessary to snapshot the VM
+    ///
+    fn state(&self) -> Result<CpuState>;
+    ///
+    /// Set the vCPU state.
+    /// This function is required when restoring the VM
+    ///
+    fn set_state(&self, state: &CpuState) -> Result<()>;
+
+    ///
+    /// Triggers the running of the current virtual CPU returning an exit reason.
+    ///
+    fn run(&self) -> std::result::Result<VmExit, HypervisorCpuError>;
+}
--- a/hypervisor/src/device.rs
+++ b/hypervisor/src/device.rs
@@ -0,0 +1,40 @@
+// Copyright © 2019 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+//
+// Copyright © 2020, Microsoft Corporation
+//
+// Copyright 2018-2019 CrowdStrike, Inc.
+//
+// Copyright 2020, ARM Limited
+//
+
+use crate::DeviceAttr;
+use std::os::unix::io::AsRawFd;
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+///
+/// Enum for device error
+pub enum HypervisorDeviceError {
+    ///
+    /// Set device attribute error
+    ///
+    #[error("Failed to set device attribute: {0}")]
+    SetDeviceAttribute(#[source] anyhow::Error),
+}
+
+///
+/// Result type for returning from a function
+///
+pub type Result<T> = std::result::Result<T, HypervisorDeviceError>;
+
+///
+/// Trait to represent a device
+///
+/// This crate provides a hypervisor-agnostic interfaces for device
+///
+pub trait Device: Send + Sync + AsRawFd {
+    /// Set device attribute.
+    fn set_device_attr(&self, attr: &DeviceAttr) -> Result<()>;
+}
--- a/hypervisor/src/hypervisor.rs
+++ b/hypervisor/src/hypervisor.rs
@@ -0,0 +1,116 @@
+// Copyright © 2019 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+//
+// Copyright © 2020, Microsoft Corporation
+//
+// Copyright 2018-2019 CrowdStrike, Inc.
+//
+//
+use crate::vm::Vm;
+#[cfg(target_arch = "x86_64")]
+use crate::x86_64::{CpuId, MsrList};
+#[cfg(target_arch = "x86_64")]
+use kvm_ioctls::Cap;
+use std::sync::Arc;
+
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+///
+///
+pub enum HypervisorError {
+    ///
+    /// Vm creation failure
+    ///
+    #[error("Failed to create Vm: {0}")]
+    VmCreate(#[source] anyhow::Error),
+    ///
+    /// Vm setup failure
+    ///
+    #[error("Failed to setup Vm: {0}")]
+    VmSetup(#[source] anyhow::Error),
+    ///
+    /// API version error
+    ///
+    #[error("Failed to get API Version: {0}")]
+    GetApiVersion(#[source] anyhow::Error),
+    ///
+    /// Vcpu mmap error
+    ///
+    #[error("Failed to get Vcpu Mmap: {0}")]
+    GetVcpuMmap(#[source] anyhow::Error),
+    ///
+    /// Max Vcpu error
+    ///
+    #[error("Failed to get number of max vcpus: {0}")]
+    GetMaxVcpu(#[source] anyhow::Error),
+    ///
+    /// Recommended Vcpu error
+    ///
+    #[error("Failed to get number of max vcpus: {0}")]
+    GetNrVcpus(#[source] anyhow::Error),
+    ///
+    /// CpuId error
+    ///
+    #[error("Failed to get number of max vcpus: {0}")]
+    GetCpuId(#[source] anyhow::Error),
+    ///
+    /// Failed to retrieve list of MSRs.
+    ///
+    #[error("Failed to get the list of supported MSRs: {0}")]
+    GetMsrList(#[source] anyhow::Error),
+}
+
+///
+/// Result type for returning from a function
+///
+pub type Result<T> = std::result::Result<T, HypervisorError>;
+
+///
+/// Trait to represent a Hypervisor
+///
+/// This crate provides a hypervisor-agnostic interfaces
+///
+pub trait Hypervisor: Send + Sync {
+    ///
+    /// Create a Vm using the underlying hypervisor
+    /// Return a hypervisor-agnostic Vm trait object
+    ///
+    fn create_vm(&self) -> Result<Arc<dyn Vm>>;
+    ///
+    /// Get the API version of the hypervisor
+    ///
+    fn get_api_version(&self) -> i32;
+    ///
+    /// Returns the size of the memory mapping required to use the vcpu's structures
+    ///
+    fn get_vcpu_mmap_size(&self) -> Result<usize>;
+    ///
+    /// Gets the recommended maximum number of VCPUs per VM.
+    ///
+    fn get_max_vcpus(&self) -> Result<usize>;
+    ///
+    /// Gets the recommended number of VCPUs per VM.
+    ///
+    fn get_nr_vcpus(&self) -> Result<usize>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Checks if a particular `Cap` is available.
+    ///
+    fn check_capability(&self, c: Cap) -> bool;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Get the supported CpuID
+    ///
+    fn get_cpuid(&self) -> Result<CpuId>;
+    ///
+    /// Check particular extensions if any
+    ///
+    fn check_required_extensions(&self) -> Result<()>;
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Retrieve the list of MSRs supported by the hypervisor.
+    ///
+    fn get_msr_list(&self) -> Result<MsrList>;
+}
--- a/hypervisor/src/kvm/aarch64/mod.rs
+++ b/hypervisor/src/kvm/aarch64/mod.rs
@@ -0,0 +1,27 @@
+// Copyright © 2019 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+//
+// Copyright © 2020, Microsoft Corporation
+//
+// Copyright 2018-2019 CrowdStrike, Inc.
+//
+//
+
+///
+/// Export generically-named wrappers of kvm-bindings for Unix-based platforms
+///
+use crate::kvm::{KvmError, KvmResult};
+pub use kvm_bindings::kvm_vcpu_init as VcpuInit;
+use serde_derive::{Deserialize, Serialize};
+pub use {kvm_ioctls::Cap, kvm_ioctls::Kvm};
+
+pub fn check_required_kvm_extensions(kvm: &Kvm) -> KvmResult<()> {
+    if !kvm.check_extension(Cap::SignalMsi) {
+        return Err(KvmError::CapabilityMissing(Cap::SignalMsi));
+    }
+    Ok(())
+}
+
+#[derive(Clone, Serialize, Deserialize)]
+pub struct VcpuKvmState {}
--- a/hypervisor/src/kvm/mod.rs
+++ b/hypervisor/src/kvm/mod.rs
@@ -0,0 +1,953 @@
+// Copyright © 2019 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+//
+// Copyright © 2020, Microsoft Corporation
+//
+// Copyright 2018-2019 CrowdStrike, Inc.
+//
+//
+
+use kvm_ioctls::{NoDatamatch, VcpuFd, VmFd};
+use std::os::unix::io::{AsRawFd, RawFd};
+use std::result;
+use std::sync::Arc;
+#[cfg(target_arch = "x86_64")]
+use vm_memory::Address;
+use vmm_sys_util::eventfd::EventFd;
+
+#[cfg(target_arch = "aarch64")]
+pub use crate::aarch64::{check_required_kvm_extensions, VcpuInit, VcpuKvmState as CpuState};
+use crate::cpu;
+use crate::device;
+use crate::hypervisor;
+use crate::vm;
+// x86_64 dependencies
+#[cfg(target_arch = "x86_64")]
+pub mod x86_64;
+
+#[cfg(target_arch = "x86_64")]
+use x86_64::{
+    check_required_kvm_extensions, FpuState, SpecialRegisters, StandardRegisters, KVM_TSS_ADDRESS,
+};
+
+#[cfg(target_arch = "x86_64")]
+pub use x86_64::{
+    CpuId, CpuIdEntry, ExtendedControlRegisters, LapicState, MsrEntries, VcpuKvmState as CpuState,
+    Xsave, CPUID_FLAG_VALID_INDEX,
+};
+
+#[cfg(target_arch = "x86_64")]
+use kvm_bindings::{kvm_enable_cap, MsrList, KVM_CAP_SPLIT_IRQCHIP};
+
+#[cfg(target_arch = "x86_64")]
+use crate::arch::x86::NUM_IOAPIC_PINS;
+
+// aarch64 dependencies
+#[cfg(target_arch = "aarch64")]
+pub mod aarch64;
+
+pub use kvm_bindings;
+pub use kvm_bindings::{
+    kvm_create_device, kvm_device_type_KVM_DEV_TYPE_VFIO, kvm_irq_routing, kvm_irq_routing_entry,
+    kvm_userspace_memory_region, KVM_IRQ_ROUTING_MSI, KVM_MEM_READONLY, KVM_MSI_VALID_DEVID,
+};
+pub use kvm_ioctls;
+pub use kvm_ioctls::{Cap, Kvm};
+
+///
+/// Export generically-named wrappers of kvm-bindings for Unix-based platforms
+///
+pub use {
+    kvm_bindings::kvm_clock_data as ClockData, kvm_bindings::kvm_create_device as CreateDevice,
+    kvm_bindings::kvm_device_attr as DeviceAttr,
+    kvm_bindings::kvm_irq_routing_entry as IrqRoutingEntry, kvm_bindings::kvm_mp_state as MpState,
+    kvm_bindings::kvm_userspace_memory_region as MemoryRegion,
+    kvm_bindings::kvm_vcpu_events as VcpuEvents, kvm_ioctls::DeviceFd, kvm_ioctls::IoEventAddress,
+    kvm_ioctls::VcpuExit,
+};
+
+/// Wrapper over KVM VM ioctls.
+pub struct KvmVm {
+    fd: Arc<VmFd>,
+    #[cfg(target_arch = "x86_64")]
+    msrs: MsrEntries,
+}
+
+// Returns a `Vec<T>` with a size in bytes at least as large as `size_in_bytes`.
+fn vec_with_size_in_bytes<T: Default>(size_in_bytes: usize) -> Vec<T> {
+    let rounded_size = (size_in_bytes + size_of::<T>() - 1) / size_of::<T>();
+    let mut v = Vec::with_capacity(rounded_size);
+    v.resize_with(rounded_size, T::default);
+    v
+}
+
+// The kvm API has many structs that resemble the following `Foo` structure:
+//
+// ```
+// #[repr(C)]
+// struct Foo {
+//    some_data: u32
+//    entries: __IncompleteArrayField<__u32>,
+// }
+// ```
+//
+// In order to allocate such a structure, `size_of::<Foo>()` would be too small because it would not
+// include any space for `entries`. To make the allocation large enough while still being aligned
+// for `Foo`, a `Vec<Foo>` is created. Only the first element of `Vec<Foo>` would actually be used
+// as a `Foo`. The remaining memory in the `Vec<Foo>` is for `entries`, which must be contiguous
+// with `Foo`. This function is used to make the `Vec<Foo>` with enough space for `count` entries.
+use std::mem::size_of;
+fn vec_with_array_field<T: Default, F>(count: usize) -> Vec<T> {
+    let element_space = count * size_of::<F>();
+    let vec_size_bytes = size_of::<T>() + element_space;
+    vec_with_size_in_bytes(vec_size_bytes)
+}
+
+///
+/// Implementation of Vm trait for KVM
+/// Example:
+/// #[cfg(feature = "kvm")]
+/// extern crate hypervisor
+/// let kvm = hypervisor::kvm::KvmHypervisor::new().unwrap();
+/// let hypervisor: Arc<dyn hypervisor::Hypervisor> = Arc::new(kvm);
+/// let vm = hypervisor.create_vm().expect("new VM fd creation failed");
+/// vm.set/get().unwrap()
+///
+impl vm::Vm for KvmVm {
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Sets the address of the three-page region in the VM's address space.
+    ///
+    fn set_tss_address(&self, offset: usize) -> vm::Result<()> {
+        self.fd
+            .set_tss_address(offset)
+            .map_err(|e| vm::HypervisorVmError::SetTssAddress(e.into()))
+    }
+    ///
+    /// Creates an in-kernel interrupt controller.
+    ///
+    fn create_irq_chip(&self) -> vm::Result<()> {
+        self.fd
+            .create_irq_chip()
+            .map_err(|e| vm::HypervisorVmError::CreateIrq(e.into()))
+    }
+    ///
+    /// Registers an event that will, when signaled, trigger the `gsi` IRQ.
+    ///
+    fn register_irqfd(&self, fd: &EventFd, gsi: u32) -> vm::Result<()> {
+        self.fd
+            .register_irqfd(fd, gsi)
+            .map_err(|e| vm::HypervisorVmError::RegisterIrqFd(e.into()))
+    }
+    ///
+    /// Unregisters an event that will, when signaled, trigger the `gsi` IRQ.
+    ///
+    fn unregister_irqfd(&self, fd: &EventFd, gsi: u32) -> vm::Result<()> {
+        self.fd
+            .unregister_irqfd(fd, gsi)
+            .map_err(|e| vm::HypervisorVmError::UnregisterIrqFd(e.into()))
+    }
+    ///
+    /// Creates a VcpuFd object from a vcpu RawFd.
+    ///
+    fn create_vcpu(&self, id: u8) -> vm::Result<Arc<dyn cpu::Vcpu>> {
+        let vc = self
+            .fd
+            .create_vcpu(id)
+            .map_err(|e| vm::HypervisorVmError::CreateVcpu(e.into()))?;
+        let vcpu = KvmVcpu {
+            fd: vc,
+            #[cfg(target_arch = "x86_64")]
+            msrs: self.msrs.clone(),
+        };
+        Ok(Arc::new(vcpu))
+    }
+    ///
+    /// Registers an event to be signaled whenever a certain address is written to.
+    ///
+    fn register_ioevent(
+        &self,
+        fd: &EventFd,
+        addr: &IoEventAddress,
+        datamatch: Option<vm::DataMatch>,
+    ) -> vm::Result<()> {
+        if let Some(dm) = datamatch {
+            match dm {
+                vm::DataMatch::DataMatch32(kvm_dm32) => self
+                    .fd
+                    .register_ioevent(fd, addr, kvm_dm32)
+                    .map_err(|e| vm::HypervisorVmError::RegisterIoEvent(e.into())),
+                vm::DataMatch::DataMatch64(kvm_dm64) => self
+                    .fd
+                    .register_ioevent(fd, addr, kvm_dm64)
+                    .map_err(|e| vm::HypervisorVmError::RegisterIoEvent(e.into())),
+            }
+        } else {
+            self.fd
+                .register_ioevent(fd, addr, NoDatamatch)
+                .map_err(|e| vm::HypervisorVmError::RegisterIoEvent(e.into()))
+        }
+    }
+    ///
+    /// Unregisters an event from a certain address it has been previously registered to.
+    ///
+    fn unregister_ioevent(&self, fd: &EventFd, addr: &IoEventAddress) -> vm::Result<()> {
+        self.fd
+            .unregister_ioevent(fd, addr, NoDatamatch)
+            .map_err(|e| vm::HypervisorVmError::UnregisterIoEvent(e.into()))
+    }
+    ///
+    /// Sets the GSI routing table entries, overwriting any previously set
+    /// entries, as per the `KVM_SET_GSI_ROUTING` ioctl.
+    ///
+    fn set_gsi_routing(&self, entries: &[IrqRoutingEntry]) -> vm::Result<()> {
+        let mut irq_routing =
+            vec_with_array_field::<kvm_irq_routing, kvm_irq_routing_entry>(entries.len());
+        irq_routing[0].nr = entries.len() as u32;
+        irq_routing[0].flags = 0;
+
+        unsafe {
+            let entries_slice: &mut [kvm_irq_routing_entry] =
+                irq_routing[0].entries.as_mut_slice(entries.len());
+            entries_slice.copy_from_slice(&entries);
+        }
+
+        self.fd
+            .set_gsi_routing(&irq_routing[0])
+            .map_err(|e| vm::HypervisorVmError::SetGsiRouting(e.into()))
+    }
+    ///
+    /// Creates a memory region structure that can be used with set_user_memory_region
+    ///
+    fn make_user_memory_region(
+        &self,
+        slot: u32,
+        guest_phys_addr: u64,
+        memory_size: u64,
+        userspace_addr: u64,
+        readonly: bool,
+    ) -> MemoryRegion {
+        MemoryRegion {
+            slot,
+            guest_phys_addr,
+            memory_size,
+            userspace_addr,
+            flags: if readonly { KVM_MEM_READONLY } else { 0 },
+        }
+    }
+    ///
+    /// Creates/modifies a guest physical memory slot.
+    ///
+    fn set_user_memory_region(&self, user_memory_region: MemoryRegion) -> vm::Result<()> {
+        // Safe because guest regions are guaranteed not to overlap.
+        unsafe {
+            self.fd
+                .set_user_memory_region(user_memory_region)
+                .map_err(|e| vm::HypervisorVmError::SetUserMemory(e.into()))
+        }
+    }
+    ///
+    /// Creates an emulated device in the kernel.
+    ///
+    /// See the documentation for `KVM_CREATE_DEVICE`.
+    fn create_device(&self, device: &mut CreateDevice) -> vm::Result<Arc<dyn device::Device>> {
+        let fd = self
+            .fd
+            .create_device(device)
+            .map_err(|e| vm::HypervisorVmError::CreateDevice(e.into()))?;
+        let device = KvmDevice { fd };
+        Ok(Arc::new(device))
+    }
+    ///
+    /// Returns the preferred CPU target type which can be emulated by KVM on underlying host.
+    ///
+    #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
+    fn get_preferred_target(&self, kvi: &mut VcpuInit) -> vm::Result<()> {
+        self.fd
+            .get_preferred_target(kvi)
+            .map_err(|e| vm::HypervisorVmError::GetPreferredTarget(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    fn enable_split_irq(&self) -> vm::Result<()> {
+        // Set TSS
+        self.fd
+            .set_tss_address(KVM_TSS_ADDRESS.raw_value() as usize)
+            .map_err(|e| vm::HypervisorVmError::EnableSplitIrq(e.into()))?;
+        // Create split irqchip
+        // Only the local APIC is emulated in kernel, both PICs and IOAPIC
+        // are not.
+        let mut cap: kvm_enable_cap = Default::default();
+        cap.cap = KVM_CAP_SPLIT_IRQCHIP;
+        cap.args[0] = NUM_IOAPIC_PINS as u64;
+        self.fd
+            .enable_cap(&cap)
+            .map_err(|e| vm::HypervisorVmError::EnableSplitIrq(e.into()))?;
+        Ok(())
+    }
+    /// Retrieve guest clock.
+    #[cfg(target_arch = "x86_64")]
+    fn get_clock(&self) -> vm::Result<ClockData> {
+        self.fd
+            .get_clock()
+            .map_err(|e| vm::HypervisorVmError::GetClock(e.into()))
+    }
+    /// Set guest clock.
+    #[cfg(target_arch = "x86_64")]
+    fn set_clock(&self, data: &ClockData) -> vm::Result<()> {
+        self.fd
+            .set_clock(data)
+            .map_err(|e| vm::HypervisorVmError::SetClock(e.into()))
+    }
+    /// Checks if a particular `Cap` is available.
+    fn check_extension(&self, c: Cap) -> bool {
+        self.fd.check_extension(c)
+    }
+    /// Create a device that is used for passthrough
+    fn create_passthrough_device(&self) -> vm::Result<Arc<dyn device::Device>> {
+        let mut vfio_dev = kvm_create_device {
+            type_: kvm_device_type_KVM_DEV_TYPE_VFIO,
+            fd: 0,
+            flags: 0,
+        };
+
+        self.create_device(&mut vfio_dev)
+            .map_err(|e| vm::HypervisorVmError::CreatePassthroughDevice(e.into()))
+    }
+}
+/// Wrapper over KVM system ioctls.
+pub struct KvmHypervisor {
+    kvm: Kvm,
+}
+/// Enum for KVM related error
+#[derive(Debug)]
+pub enum KvmError {
+    CapabilityMissing(Cap),
+}
+pub type KvmResult<T> = result::Result<T, KvmError>;
+impl KvmHypervisor {
+    /// Create a hypervisor based on Kvm
+    pub fn new() -> hypervisor::Result<KvmHypervisor> {
+        let kvm_obj = Kvm::new().map_err(|e| hypervisor::HypervisorError::VmCreate(e.into()))?;
+        Ok(KvmHypervisor { kvm: kvm_obj })
+    }
+}
+/// Implementation of Hypervisor trait for KVM
+/// Example:
+/// #[cfg(feature = "kvm")]
+/// extern crate hypervisor
+/// let kvm = hypervisor::kvm::KvmHypervisor::new().unwrap();
+/// let hypervisor: Arc<dyn hypervisor::Hypervisor> = Arc::new(kvm);
+/// let vm = hypervisor.create_vm().expect("new VM fd creation failed");
+///
+impl hypervisor::Hypervisor for KvmHypervisor {
+    /// Create a KVM vm object and return the object as Vm trait object
+    /// Example
+    /// # extern crate hypervisor;
+    /// # use hypervisor::KvmHypervisor;
+    /// use hypervisor::KvmVm;
+    /// let hypervisor = KvmHypervisor::new().unwrap();
+    /// let vm = hypervisor.create_vm().unwrap()
+    ///
+    fn create_vm(&self) -> hypervisor::Result<Arc<dyn vm::Vm>> {
+        let fd: VmFd;
+        loop {
+            match self.kvm.create_vm() {
+                Ok(res) => fd = res,
+                Err(e) => {
+                    if e.errno() == libc::EINTR {
+                        // If the error returned is EINTR, which means the
+                        // ioctl has been interrupted, we have to retry as
+                        // this can't be considered as a regular error.
+                        continue;
+                    } else {
+                        return Err(hypervisor::HypervisorError::VmCreate(e.into()));
+                    }
+                }
+            }
+            break;
+        }
+
+        let vm_fd = Arc::new(fd);
+
+        #[cfg(target_arch = "x86_64")]
+        {
+            let msr_list = self.get_msr_list()?;
+            let num_msrs = msr_list.as_fam_struct_ref().nmsrs as usize;
+            let mut msrs = MsrEntries::new(num_msrs);
+            let indices = msr_list.as_slice();
+            let msr_entries = msrs.as_mut_slice();
+            for (pos, index) in indices.iter().enumerate() {
+                msr_entries[pos].index = *index;
+            }
+
+            Ok(Arc::new(KvmVm { fd: vm_fd, msrs }))
+        }
+
+        #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
+        {
+            Ok(Arc::new(KvmVm { fd: vm_fd }))
+        }
+    }
+
+    fn check_required_extensions(&self) -> hypervisor::Result<()> {
+        check_required_kvm_extensions(&self.kvm).expect("Missing KVM capabilities");
+        Ok(())
+    }
+
+    ///
+    /// Returns the KVM API version.
+    ///
+    fn get_api_version(&self) -> i32 {
+        self.kvm.get_api_version()
+    }
+    ///
+    ///  Returns the size of the memory mapping required to use the vcpu's `kvm_run` structure.
+    ///
+    fn get_vcpu_mmap_size(&self) -> hypervisor::Result<usize> {
+        self.kvm
+            .get_vcpu_mmap_size()
+            .map_err(|e| hypervisor::HypervisorError::GetVcpuMmap(e.into()))
+    }
+    ///
+    /// Gets the recommended maximum number of VCPUs per VM.
+    ///
+    fn get_max_vcpus(&self) -> hypervisor::Result<usize> {
+        Ok(self.kvm.get_max_vcpus())
+    }
+    ///
+    /// Gets the recommended number of VCPUs per VM.
+    ///
+    fn get_nr_vcpus(&self) -> hypervisor::Result<usize> {
+        Ok(self.kvm.get_nr_vcpus())
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Checks if a particular `Cap` is available.
+    ///
+    fn check_capability(&self, c: Cap) -> bool {
+        self.kvm.check_extension(c)
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call to get the system supported CPUID values.
+    ///
+    fn get_cpuid(&self) -> hypervisor::Result<CpuId> {
+        self.kvm
+            .get_supported_cpuid(kvm_bindings::KVM_MAX_CPUID_ENTRIES)
+            .map_err(|e| hypervisor::HypervisorError::GetCpuId(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Retrieve the list of MSRs supported by KVM.
+    ///
+    fn get_msr_list(&self) -> hypervisor::Result<MsrList> {
+        self.kvm
+            .get_msr_index_list()
+            .map_err(|e| hypervisor::HypervisorError::GetMsrList(e.into()))
+    }
+}
+/// Vcpu struct for KVM
+pub struct KvmVcpu {
+    fd: VcpuFd,
+    #[cfg(target_arch = "x86_64")]
+    msrs: MsrEntries,
+}
+/// Implementation of Vcpu trait for KVM
+/// Example:
+/// #[cfg(feature = "kvm")]
+/// extern crate hypervisor
+/// let kvm = hypervisor::kvm::KvmHypervisor::new().unwrap();
+/// let hypervisor: Arc<dyn hypervisor::Hypervisor> = Arc::new(kvm);
+/// let vm = hypervisor.create_vm().expect("new VM fd creation failed");
+/// let vcpu = vm.create_vcpu(0).unwrap();
+/// vcpu.get/set().unwrap()
+///
+impl cpu::Vcpu for KvmVcpu {
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns the vCPU general purpose registers.
+    ///
+    fn get_regs(&self) -> cpu::Result<StandardRegisters> {
+        self.fd
+            .get_regs()
+            .map_err(|e| cpu::HypervisorCpuError::GetStandardRegs(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Sets the vCPU general purpose registers using the `KVM_SET_REGS` ioctl.
+    ///
+    fn set_regs(&self, regs: &StandardRegisters) -> cpu::Result<()> {
+        self.fd
+            .set_regs(regs)
+            .map_err(|e| cpu::HypervisorCpuError::SetStandardRegs(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns the vCPU special registers.
+    ///
+    fn get_sregs(&self) -> cpu::Result<SpecialRegisters> {
+        self.fd
+            .get_sregs()
+            .map_err(|e| cpu::HypervisorCpuError::GetSpecialRegs(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Sets the vCPU special registers using the `KVM_SET_SREGS` ioctl.
+    ///
+    fn set_sregs(&self, sregs: &SpecialRegisters) -> cpu::Result<()> {
+        self.fd
+            .set_sregs(sregs)
+            .map_err(|e| cpu::HypervisorCpuError::SetSpecialRegs(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns the floating point state (FPU) from the vCPU.
+    ///
+    fn get_fpu(&self) -> cpu::Result<FpuState> {
+        self.fd
+            .get_fpu()
+            .map_err(|e| cpu::HypervisorCpuError::GetFloatingPointRegs(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Set the floating point state (FPU) of a vCPU using the `KVM_SET_FPU` ioct.
+    ///
+    fn set_fpu(&self, fpu: &FpuState) -> cpu::Result<()> {
+        self.fd
+            .set_fpu(fpu)
+            .map_err(|e| cpu::HypervisorCpuError::SetFloatingPointRegs(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call to setup the CPUID registers.
+    ///
+    fn set_cpuid2(&self, cpuid: &CpuId) -> cpu::Result<()> {
+        self.fd
+            .set_cpuid2(cpuid)
+            .map_err(|e| cpu::HypervisorCpuError::SetCpuid(e.into()))
+    }
+    ///
+    /// X86 specific call to retrieve the CPUID registers.
+    ///
+    #[cfg(target_arch = "x86_64")]
+    fn get_cpuid2(&self, num_entries: usize) -> cpu::Result<CpuId> {
+        self.fd
+            .get_cpuid2(num_entries)
+            .map_err(|e| cpu::HypervisorCpuError::GetCpuid(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns the state of the LAPIC (Local Advanced Programmable Interrupt Controller).
+    ///
+    fn get_lapic(&self) -> cpu::Result<LapicState> {
+        self.fd
+            .get_lapic()
+            .map_err(|e| cpu::HypervisorCpuError::GetlapicState(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Sets the state of the LAPIC (Local Advanced Programmable Interrupt Controller).
+    ///
+    fn set_lapic(&self, klapic: &LapicState) -> cpu::Result<()> {
+        self.fd
+            .set_lapic(klapic)
+            .map_err(|e| cpu::HypervisorCpuError::SetLapicState(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns the model-specific registers (MSR) for this vCPU.
+    ///
+    fn get_msrs(&self, msrs: &mut MsrEntries) -> cpu::Result<usize> {
+        self.fd
+            .get_msrs(msrs)
+            .map_err(|e| cpu::HypervisorCpuError::GetMsrEntries(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Setup the model-specific registers (MSR) for this vCPU.
+    /// Returns the number of MSR entries actually written.
+    ///
+    fn set_msrs(&self, msrs: &MsrEntries) -> cpu::Result<usize> {
+        self.fd
+            .set_msrs(msrs)
+            .map_err(|e| cpu::HypervisorCpuError::SetMsrEntries(e.into()))
+    }
+    ///
+    /// Returns the vcpu's current "multiprocessing state".
+    ///
+    fn get_mp_state(&self) -> cpu::Result<MpState> {
+        self.fd
+            .get_mp_state()
+            .map_err(|e| cpu::HypervisorCpuError::GetMpState(e.into()))
+    }
+    ///
+    /// Sets the vcpu's current "multiprocessing state".
+    ///
+    fn set_mp_state(&self, mp_state: MpState) -> cpu::Result<()> {
+        self.fd
+            .set_mp_state(mp_state)
+            .map_err(|e| cpu::HypervisorCpuError::SetMpState(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call that returns the vcpu's current "xsave struct".
+    ///
+    fn get_xsave(&self) -> cpu::Result<Xsave> {
+        self.fd
+            .get_xsave()
+            .map_err(|e| cpu::HypervisorCpuError::GetXsaveState(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call that sets the vcpu's current "xsave struct".
+    ///
+    fn set_xsave(&self, xsave: &Xsave) -> cpu::Result<()> {
+        self.fd
+            .set_xsave(xsave)
+            .map_err(|e| cpu::HypervisorCpuError::SetXsaveState(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call that returns the vcpu's current "xcrs".
+    ///
+    fn get_xcrs(&self) -> cpu::Result<ExtendedControlRegisters> {
+        self.fd
+            .get_xcrs()
+            .map_err(|e| cpu::HypervisorCpuError::GetXcsr(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// X86 specific call that sets the vcpu's current "xcrs".
+    ///
+    fn set_xcrs(&self, xcrs: &ExtendedControlRegisters) -> cpu::Result<()> {
+        self.fd
+            .set_xcrs(&xcrs)
+            .map_err(|e| cpu::HypervisorCpuError::SetXcsr(e.into()))
+    }
+    ///
+    /// Triggers the running of the current virtual CPU returning an exit reason.
+    ///
+    fn run(&self) -> std::result::Result<cpu::VmExit, cpu::HypervisorCpuError> {
+        match self.fd.run() {
+            Ok(run) => match run {
+                #[cfg(target_arch = "x86_64")]
+                VcpuExit::IoIn(addr, data) => Ok(cpu::VmExit::IoIn(addr, data)),
+                #[cfg(target_arch = "x86_64")]
+                VcpuExit::IoOut(addr, data) => Ok(cpu::VmExit::IoOut(addr, data)),
+                #[cfg(target_arch = "x86_64")]
+                VcpuExit::IoapicEoi(vector) => Ok(cpu::VmExit::IoapicEoi(vector)),
+                #[cfg(target_arch = "x86_64")]
+                VcpuExit::Shutdown | VcpuExit::Hlt => Ok(cpu::VmExit::Reset),
+
+                #[cfg(target_arch = "aarch64")]
+                VcpuExit::SystemEvent(event_type, flags) => {
+                    use kvm_bindings::KVM_SYSTEM_EVENT_SHUTDOWN;
+                    // On Aarch64, when the VM is shutdown, run() returns
+                    // VcpuExit::SystemEvent with reason KVM_SYSTEM_EVENT_SHUTDOWN
+                    if event_type == KVM_SYSTEM_EVENT_SHUTDOWN {
+                        Ok(cpu::VmExit::Reset)
+                    } else {
+                        Err(cpu::HypervisorCpuError::RunVcpu(anyhow!(
+                            "Unexpected system event with type 0x{:x}, flags 0x{:x}",
+                            event_type,
+                            flags
+                        )))
+                    }
+                }
+
+                VcpuExit::MmioRead(addr, data) => Ok(cpu::VmExit::MmioRead(addr, data)),
+                VcpuExit::MmioWrite(addr, data) => Ok(cpu::VmExit::MmioWrite(addr, data)),
+
+                r => Err(cpu::HypervisorCpuError::RunVcpu(anyhow!(
+                    "Unexpected exit reason on vcpu run: {:?}",
+                    r
+                ))),
+            },
+
+            Err(ref e) => match e.errno() {
+                libc::EAGAIN | libc::EINTR => Ok(cpu::VmExit::Ignore),
+                _ => Err(cpu::HypervisorCpuError::RunVcpu(anyhow!(
+                    "VCPU error {:?}",
+                    e
+                ))),
+            },
+        }
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Returns currently pending exceptions, interrupts, and NMIs as well as related
+    /// states of the vcpu.
+    ///
+    fn get_vcpu_events(&self) -> cpu::Result<VcpuEvents> {
+        self.fd
+            .get_vcpu_events()
+            .map_err(|e| cpu::HypervisorCpuError::GetVcpuEvents(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Sets pending exceptions, interrupts, and NMIs as well as related states
+    /// of the vcpu.
+    ///
+    fn set_vcpu_events(&self, events: &VcpuEvents) -> cpu::Result<()> {
+        self.fd
+            .set_vcpu_events(events)
+            .map_err(|e| cpu::HypervisorCpuError::SetVcpuEvents(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Let the guest know that it has been paused, which prevents from
+    /// potential soft lockups when being resumed.
+    ///
+    fn notify_guest_clock_paused(&self) -> cpu::Result<()> {
+        self.fd
+            .kvmclock_ctrl()
+            .map_err(|e| cpu::HypervisorCpuError::NotifyGuestClockPaused(e.into()))
+    }
+    #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
+    fn vcpu_init(&self, kvi: &VcpuInit) -> cpu::Result<()> {
+        self.fd
+            .vcpu_init(kvi)
+            .map_err(|e| cpu::HypervisorCpuError::VcpuInit(e.into()))
+    }
+    ///
+    /// Sets the value of one register for this vCPU.
+    ///
+    #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
+    fn set_one_reg(&self, reg_id: u64, data: u64) -> cpu::Result<()> {
+        self.fd
+            .set_one_reg(reg_id, data)
+            .map_err(|e| cpu::HypervisorCpuError::SetOneReg(e.into()))
+    }
+    ///
+    /// Gets the value of one register for this vCPU.
+    ///
+    #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
+    fn get_one_reg(&self, reg_id: u64) -> cpu::Result<u64> {
+        self.fd
+            .get_one_reg(reg_id)
+            .map_err(|e| cpu::HypervisorCpuError::GetOneReg(e.into()))
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Get the current CPU state
+    ///
+    /// Ordering requirements:
+    ///
+    /// KVM_GET_MP_STATE calls kvm_apic_accept_events(), which might modify
+    /// vCPU/LAPIC state. As such, it must be done before most everything
+    /// else, otherwise we cannot restore everything and expect it to work.
+    ///
+    /// KVM_GET_VCPU_EVENTS/KVM_SET_VCPU_EVENTS is unsafe if other vCPUs are
+    /// still running.
+    ///
+    /// KVM_GET_LAPIC may change state of LAPIC before returning it.
+    ///
+    /// GET_VCPU_EVENTS should probably be last to save. The code looks as
+    /// it might as well be affected by internal state modifications of the
+    /// GET ioctls.
+    ///
+    /// SREGS saves/restores a pending interrupt, similar to what
+    /// VCPU_EVENTS also does.
+    ///
+    /// GET_MSRS requires a pre-populated data structure to do something
+    /// meaningful. For SET_MSRS it will then contain good data.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// # extern crate hypervisor;
+    /// # use hypervisor::KvmHypervisor;
+    /// # use std::sync::Arc;
+    /// let kvm = hypervisor::kvm::KvmHypervisor::new().unwrap();
+    /// let hv: Arc<dyn hypervisor::Hypervisor> = Arc::new(kvm);
+    /// let vm = hv.create_vm().expect("new VM fd creation failed");
+    /// vm.enable_split_irq().unwrap();
+    /// let vcpu = vm.create_vcpu(0).unwrap();
+    /// let state = vcpu.state().unwrap();
+    /// ```
+    fn state(&self) -> cpu::Result<CpuState> {
+        let mp_state = self.get_mp_state()?;
+        let regs = self.get_regs()?;
+        let sregs = self.get_sregs()?;
+        let xsave = self.get_xsave()?;
+        let xcrs = self.get_xcrs()?;
+        let lapic_state = self.get_lapic()?;
+        let fpu = self.get_fpu()?;
+
+        // Try to get all MSRs based on the list previously retrieved from KVM.
+        // If the number of MSRs obtained from GET_MSRS is different from the
+        // expected amount, we fallback onto a slower method by getting MSRs
+        // by chunks. This is the only way to make sure we try to get as many
+        // MSRs as possible, even if some MSRs are not supported.
+        let mut msr_entries = self.msrs.clone();
+        let expected_num_msrs = msr_entries.as_fam_struct_ref().nmsrs as usize;
+        let num_msrs = self.get_msrs(&mut msr_entries)?;
+        let msrs = if num_msrs != expected_num_msrs {
+            let mut faulty_msr_index = num_msrs;
+            let mut msr_entries_tmp =
+                MsrEntries::from_entries(&msr_entries.as_slice()[..faulty_msr_index]);
+
+            loop {
+                warn!(
+                    "Detected faulty MSR 0x{:x} while getting MSRs",
+                    msr_entries.as_slice()[faulty_msr_index].index
+                );
+
+                let start_pos = faulty_msr_index + 1;
+                let mut sub_msr_entries =
+                    MsrEntries::from_entries(&msr_entries.as_slice()[start_pos..]);
+                let expected_num_msrs = sub_msr_entries.as_fam_struct_ref().nmsrs as usize;
+                let num_msrs = self.get_msrs(&mut sub_msr_entries)?;
+
+                for i in 0..num_msrs {
+                    msr_entries_tmp
+                        .push(sub_msr_entries.as_slice()[i])
+                        .map_err(|e| {
+                            cpu::HypervisorCpuError::GetMsrEntries(anyhow!(
+                                "Failed adding MSR entries: {:?}",
+                                e
+                            ))
+                        })?;
+                }
+
+                if num_msrs == expected_num_msrs {
+                    break;
+                }
+
+                faulty_msr_index = start_pos + num_msrs;
+            }
+
+            msr_entries_tmp
+        } else {
+            msr_entries
+        };
+
+        let vcpu_events = self.get_vcpu_events()?;
+
+        Ok(CpuState {
+            msrs,
+            vcpu_events,
+            regs,
+            sregs,
+            fpu,
+            lapic_state,
+            xsave,
+            xcrs,
+            mp_state,
+        })
+    }
+    #[cfg(target_arch = "aarch64")]
+    fn state(&self) -> cpu::Result<CpuState> {
+        unimplemented!();
+    }
+    #[cfg(target_arch = "x86_64")]
+    ///
+    /// Restore the previously saved CPU state
+    ///
+    /// Ordering requirements:
+    ///
+    /// KVM_GET_VCPU_EVENTS/KVM_SET_VCPU_EVENTS is unsafe if other vCPUs are
+    /// still running.
+    ///
+    /// Some SET ioctls (like set_mp_state) depend on kvm_vcpu_is_bsp(), so
+    /// if we ever change the BSP, we have to do that before restoring anything.
+    /// The same seems to be true for CPUID stuff.
+    ///
+    /// SREGS saves/restores a pending interrupt, similar to what
+    /// VCPU_EVENTS also does.
+    ///
+    /// SET_REGS clears pending exceptions unconditionally, thus, it must be
+    /// done before SET_VCPU_EVENTS, which restores it.
+    ///
+    /// SET_LAPIC must come after SET_SREGS, because the latter restores
+    /// the apic base msr.
+    ///
+    /// SET_LAPIC must come before SET_MSRS, because the TSC deadline MSR
+    /// only restores successfully, when the LAPIC is correctly configured.
+    ///
+    /// Arguments: CpuState
+    /// # Example
+    ///
+    /// ```rust
+    /// # extern crate hypervisor;
+    /// # use hypervisor::KvmHypervisor;
+    /// # use std::sync::Arc;
+    /// let kvm = hypervisor::kvm::KvmHypervisor::new().unwrap();
+    /// let hv: Arc<dyn hypervisor::Hypervisor> = Arc::new(kvm);
+    /// let vm = hv.create_vm().expect("new VM fd creation failed");
+    /// vm.enable_split_irq().unwrap();
+    /// let vcpu = vm.create_vcpu(0).unwrap();
+    /// let state = vcpu.state().unwrap();
+    /// vcpu.set_state(&state).unwrap();
+    /// ```
+    fn set_state(&self, state: &CpuState) -> cpu::Result<()> {
+        self.set_mp_state(state.mp_state)?;
+        self.set_regs(&state.regs)?;
+        self.set_sregs(&state.sregs)?;
+        self.set_xsave(&state.xsave)?;
+        self.set_xcrs(&state.xcrs)?;
+        self.set_lapic(&state.lapic_state)?;
+        self.set_fpu(&state.fpu)?;
+
+        // Try to set all MSRs previously stored.
+        // If the number of MSRs set from SET_MSRS is different from the
+        // expected amount, we fallback onto a slower method by setting MSRs
+        // by chunks. This is the only way to make sure we try to set as many
+        // MSRs as possible, even if some MSRs are not supported.
+        let expected_num_msrs = state.msrs.as_fam_struct_ref().nmsrs as usize;
+        let num_msrs = self.set_msrs(&state.msrs)?;
+        if num_msrs != expected_num_msrs {
+            let mut faulty_msr_index = num_msrs;
+
+            loop {
+                warn!(
+                    "Detected faulty MSR 0x{:x} while setting MSRs",
+                    state.msrs.as_slice()[faulty_msr_index].index
+                );
+
+                let start_pos = faulty_msr_index + 1;
+                let sub_msr_entries = MsrEntries::from_entries(&state.msrs.as_slice()[start_pos..]);
+                let expected_num_msrs = sub_msr_entries.as_fam_struct_ref().nmsrs as usize;
+                let num_msrs = self.set_msrs(&sub_msr_entries)?;
+
+                if num_msrs == expected_num_msrs {
+                    break;
+                }
+
+                faulty_msr_index = start_pos + num_msrs;
+            }
+        }
+
+        self.set_vcpu_events(&state.vcpu_events)?;
+
+        Ok(())
+    }
+    #[allow(unused_variables)]
+    #[cfg(target_arch = "aarch64")]
+    fn set_state(&self, state: &CpuState) -> cpu::Result<()> {
+        Ok(())
+    }
+}
+
+/// Device struct for KVM
+pub struct KvmDevice {
+    fd: DeviceFd,
+}
+
+impl device::Device for KvmDevice {
+    ///
+    /// Set device attribute
+    ///
+    fn set_device_attr(&self, attr: &DeviceAttr) -> device::Result<()> {
+        self.fd
+            .set_device_attr(attr)
+            .map_err(|e| device::HypervisorDeviceError::SetDeviceAttribute(e.into()))
+    }
+}
+
+impl AsRawFd for KvmDevice {
+    fn as_raw_fd(&self) -> RawFd {
+        self.fd.as_raw_fd()
+    }
+}
--- a/hypervisor/src/kvm/x86_64/mod.rs
+++ b/hypervisor/src/kvm/x86_64/mod.rs
@@ -0,0 +1,97 @@
+// Copyright © 2019 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+//
+// Copyright © 2020, Microsoft Corporation
+//
+// Copyright 2018-2019 CrowdStrike, Inc.
+//
+//
+
+use vm_memory::GuestAddress;
+
+use crate::arch::x86::{msr_index, MTRR_ENABLE, MTRR_MEM_TYPE_WB};
+use crate::kvm::{Cap, Kvm, KvmError, KvmResult};
+use serde_derive::{Deserialize, Serialize};
+
+///
+/// Export generically-named wrappers of kvm-bindings for Unix-based platforms
+///
+pub use {
+    kvm_bindings::kvm_cpuid_entry2 as CpuIdEntry, kvm_bindings::kvm_dtable as DescriptorTable,
+    kvm_bindings::kvm_fpu as FpuState, kvm_bindings::kvm_lapic_state as LapicState,
+    kvm_bindings::kvm_mp_state as MpState, kvm_bindings::kvm_msr_entry as MsrEntry,
+    kvm_bindings::kvm_regs as StandardRegisters, kvm_bindings::kvm_segment as SegmentRegister,
+    kvm_bindings::kvm_sregs as SpecialRegisters, kvm_bindings::kvm_vcpu_events as VcpuEvents,
+    kvm_bindings::kvm_xcrs as ExtendedControlRegisters, kvm_bindings::kvm_xsave as Xsave,
+    kvm_bindings::CpuId, kvm_bindings::MsrList, kvm_bindings::Msrs as MsrEntries,
+    kvm_bindings::KVM_CPUID_FLAG_SIGNIFCANT_INDEX as CPUID_FLAG_VALID_INDEX,
+};
+
+pub const KVM_TSS_ADDRESS: GuestAddress = GuestAddress(0xfffb_d000);
+
+macro_rules! msr {
+    ($msr:expr) => {
+        MsrEntry {
+            index: $msr,
+            data: 0x0,
+            ..Default::default()
+        }
+    };
+}
+macro_rules! msr_data {
+    ($msr:expr, $data:expr) => {
+        MsrEntry {
+            index: $msr,
+            data: $data,
+            ..Default::default()
+        }
+    };
+}
+
+pub fn boot_msr_entries() -> MsrEntries {
+    MsrEntries::from_entries(&[
+        msr!(msr_index::MSR_IA32_SYSENTER_CS),
+        msr!(msr_index::MSR_IA32_SYSENTER_ESP),
+        msr!(msr_index::MSR_IA32_SYSENTER_EIP),
+        msr!(msr_index::MSR_STAR),
+        msr!(msr_index::MSR_CSTAR),
+        msr!(msr_index::MSR_LSTAR),
+        msr!(msr_index::MSR_KERNEL_GS_BASE),
+        msr!(msr_index::MSR_SYSCALL_MASK),
+        msr!(msr_index::MSR_IA32_TSC),
+        msr_data!(
+            msr_index::MSR_IA32_MISC_ENABLE,
+            msr_index::MSR_IA32_MISC_ENABLE_FAST_STRING as u64
+        ),
+        msr_data!(msr_index::MSR_MTRRdefType, MTRR_ENABLE | MTRR_MEM_TYPE_WB),
+    ])
+}
+
+///
+/// Check KVM extension for Linux
+///
+pub fn check_required_kvm_extensions(kvm: &Kvm) -> KvmResult<()> {
+    if !kvm.check_extension(Cap::SignalMsi) {
+        return Err(KvmError::CapabilityMissing(Cap::SignalMsi));
+    }
+    if !kvm.check_extension(Cap::TscDeadlineTimer) {
+        return Err(KvmError::CapabilityMissing(Cap::TscDeadlineTimer));
+    }
+    if !kvm.check_extension(Cap::SplitIrqchip) {
+        return Err(KvmError::CapabilityMissing(Cap::SplitIrqchip));
+    }
+    Ok(())
+}
+#[derive(Clone, Serialize, Deserialize)]
+pub struct VcpuKvmState {
+    pub msrs: MsrEntries,
+    pub vcpu_events: VcpuEvents,
+    pub regs: StandardRegisters,
+    pub sregs: SpecialRegisters,
+    pub fpu: FpuState,
+    pub lapic_state: LapicState,
+    pub xsave: Xsave,
+    pub xcrs: ExtendedControlRegisters,
+    pub mp_state: MpState,
+}
--- a/hypervisor/src/lib.rs
+++ b/hypervisor/src/lib.rs
@@ -0,0 +1,60 @@
+// Copyright © 2019 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+//
+// Copyright © 2020, Microsoft Corporation
+//
+// Copyright 2018-2019 CrowdStrike, Inc.
+//
+//
+
+//! A generic abstraction around hypervisor functionality
+//!
+//! This crate offers a trait abstraction for underlying hypervisors
+//!
+//! # Platform support
+//!
+//! - x86_64
+//! - arm64
+//!
+
+#[macro_use]
+extern crate anyhow;
+#[macro_use]
+extern crate log;
+extern crate serde;
+extern crate serde_derive;
+extern crate serde_json;
+extern crate thiserror;
+
+/// KVM implementation module
+pub mod kvm;
+
+/// Hypevisor related module
+pub mod hypervisor;
+
+/// Vm related module
+pub mod vm;
+
+/// Architecture specific definitions
+pub mod arch;
+
+/// CPU related module
+mod cpu;
+
+/// Device related module
+mod device;
+
+pub use crate::hypervisor::{Hypervisor, HypervisorError};
+pub use cpu::{HypervisorCpuError, Vcpu, VmExit};
+pub use device::{Device, HypervisorDeviceError};
+pub use kvm::*;
+pub use vm::{DataMatch, HypervisorVmError, Vm};
+
+use std::sync::Arc;
+pub fn new() -> std::result::Result<Arc<dyn Hypervisor>, HypervisorError> {
+    #[cfg(feature = "kvm")]
+    let hv = kvm::KvmHypervisor::new()?;
+
+    Ok(Arc::new(hv))
+}
--- a/hypervisor/src/vm.rs
+++ b/hypervisor/src/vm.rs
@@ -0,0 +1,182 @@
+// Copyright © 2019 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+//
+// Copyright © 2020, Microsoft Corporation
+//
+// Copyright 2018-2019 CrowdStrike, Inc.
+//
+//
+
+#[cfg(target_arch = "aarch64")]
+use crate::aarch64::VcpuInit;
+use crate::cpu::Vcpu;
+use crate::device::Device;
+#[cfg(target_arch = "x86_64")]
+use crate::ClockData;
+use crate::{CreateDevice, IoEventAddress, IrqRoutingEntry, MemoryRegion};
+use kvm_ioctls::Cap;
+use std::sync::Arc;
+use thiserror::Error;
+use vmm_sys_util::eventfd::EventFd;
+
+///
+/// I/O events data matches (32 or 64 bits).
+///
+pub enum DataMatch {
+    DataMatch32(u32),
+    DataMatch64(u64),
+}
+
+impl Into<u64> for DataMatch {
+    fn into(self) -> u64 {
+        match self {
+            DataMatch::DataMatch32(dm) => dm.into(),
+            DataMatch::DataMatch64(dm) => dm,
+        }
+    }
+}
+
+#[derive(Error, Debug)]
+///
+/// Enum for VM error
+pub enum HypervisorVmError {
+    ///
+    /// Create Vcpu error
+    ///
+    #[error("Failed to create Vcpu: {0}")]
+    CreateVcpu(#[source] anyhow::Error),
+    ///
+    /// TSS address error
+    ///
+    #[error("Failed to set TSS address: {0}")]
+    SetTssAddress(#[source] anyhow::Error),
+    ///
+    /// Create interrupt controller error
+    ///
+    #[error("Failed to create interrupt controller: {0}")]
+    CreateIrq(#[source] anyhow::Error),
+    ///
+    /// Register interrupt event error
+    ///
+    #[error("Failed to register interrupt event: {0}")]
+    RegisterIrqFd(#[source] anyhow::Error),
+    ///
+    /// Un register interrupt event error
+    ///
+    #[error("Failed to unregister interrupt event: {0}")]
+    UnregisterIrqFd(#[source] anyhow::Error),
+    ///
+    /// Register IO event error
+    ///
+    #[error("Failed to register IO event: {0}")]
+    RegisterIoEvent(#[source] anyhow::Error),
+    ///
+    /// Unregister IO event error
+    ///
+    #[error("Failed to unregister IO event: {0}")]
+    UnregisterIoEvent(#[source] anyhow::Error),
+    ///
+    /// Set GSI routing error
+    ///
+    #[error("Failed to set GSI routing: {0}")]
+    SetGsiRouting(#[source] anyhow::Error),
+    ///
+    /// Set user memory error
+    ///
+    #[error("Failed to set user memory: {0}")]
+    SetUserMemory(#[source] anyhow::Error),
+    ///
+    /// Create device error
+    ///
+    #[error("Failed to set GSI routing: {0}")]
+    CreateDevice(#[source] anyhow::Error),
+    ///
+    /// Get preferred target error
+    ///
+    #[error("Failed to get preferred target: {0}")]
+    GetPreferredTarget(#[source] anyhow::Error),
+    ///
+    /// Enable split Irq error
+    ///
+    #[error("Failed to enable split Irq: {0}")]
+    EnableSplitIrq(#[source] anyhow::Error),
+    ///
+    /// Get clock error
+    ///
+    #[error("Failed to get clock: {0}")]
+    GetClock(#[source] anyhow::Error),
+    ///
+    /// Set clock error
+    ///
+    #[error("Failed to set clock: {0}")]
+    SetClock(#[source] anyhow::Error),
+    ///
+    /// Create passthrough device
+    ///
+    #[error("Failed to create passthrough device: {0}")]
+    CreatePassthroughDevice(#[source] anyhow::Error),
+}
+///
+/// Result type for returning from a function
+///
+pub type Result<T> = std::result::Result<T, HypervisorVmError>;
+
+///
+/// Trait to represent a Vm
+///
+/// This crate provides a hypervisor-agnostic interfaces for Vm
+///
+pub trait Vm: Send + Sync {
+    #[cfg(target_arch = "x86_64")]
+    /// Sets the address of the three-page region in the VM's address space.
+    fn set_tss_address(&self, offset: usize) -> Result<()>;
+    /// Creates an in-kernel interrupt controller.
+    fn create_irq_chip(&self) -> Result<()>;
+    /// Registers an event that will, when signaled, trigger the `gsi` IRQ.
+    fn register_irqfd(&self, fd: &EventFd, gsi: u32) -> Result<()>;
+    /// Unregister an event that will, when signaled, trigger the `gsi` IRQ.
+    fn unregister_irqfd(&self, fd: &EventFd, gsi: u32) -> Result<()>;
+    /// Creates a new KVM vCPU file descriptor and maps the memory corresponding
+    fn create_vcpu(&self, id: u8) -> Result<Arc<dyn Vcpu>>;
+    /// Registers an event to be signaled whenever a certain address is written to.
+    fn register_ioevent(
+        &self,
+        fd: &EventFd,
+        addr: &IoEventAddress,
+        datamatch: Option<DataMatch>,
+    ) -> Result<()>;
+    /// Unregister an event from a certain address it has been previously registered to.
+    fn unregister_ioevent(&self, fd: &EventFd, addr: &IoEventAddress) -> Result<()>;
+    /// Sets the GSI routing table entries, overwriting any previously set
+    fn set_gsi_routing(&self, entries: &[IrqRoutingEntry]) -> Result<()>;
+    /// Creates a memory region structure that can be used with set_user_memory_region
+    fn make_user_memory_region(
+        &self,
+        slot: u32,
+        guest_phys_addr: u64,
+        memory_size: u64,
+        userspace_addr: u64,
+        readonly: bool,
+    ) -> MemoryRegion;
+    /// Creates/modifies a guest physical memory slot.
+    fn set_user_memory_region(&self, user_memory_region: MemoryRegion) -> Result<()>;
+    /// Creates an emulated device in the kernel.
+    fn create_device(&self, device: &mut CreateDevice) -> Result<Arc<dyn Device>>;
+    /// Returns the preferred CPU target type which can be emulated by KVM on underlying host.
+    #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
+    fn get_preferred_target(&self, kvi: &mut VcpuInit) -> Result<()>;
+    /// Enable split Irq capability
+    #[cfg(target_arch = "x86_64")]
+    fn enable_split_irq(&self) -> Result<()>;
+    /// Retrieve guest clock.
+    #[cfg(target_arch = "x86_64")]
+    fn get_clock(&self) -> Result<ClockData>;
+    /// Set guest clock.
+    #[cfg(target_arch = "x86_64")]
+    fn set_clock(&self, data: &ClockData) -> Result<()>;
+    /// Checks if a particular `Cap` is available.
+    fn check_extension(&self, c: Cap) -> bool;
+    /// Create a device that is used for passthrough
+    fn create_passthrough_device(&self) -> Result<Arc<dyn Device>>;
+}
--- a/net_util/Cargo.toml
+++ b/net_util/Cargo.toml
@@ -4,14 +4,18 @@ version = "0.1.0"
 authors = ["The Chromium OS Authors"]

 [dependencies]
-libc = "0.2.71"
-rand = "0.7.3"
-serde = "1.0.111"
-vmm-sys-util = ">=0.3.1"
-
+epoll = ">=4.0.1"
+libc = "0.2.74"
+log = "0.4.11"
 net_gen = { path = "../net_gen" }
+rand = "0.7.3"
+serde = "1.0.114"
+virtio-bindings = "0.1.0"
+vm-memory = { version = "0.2.1", features = ["backend-mmap", "backend-atomic"] }
+vm-virtio = { path = "../vm-virtio" }
+vmm-sys-util = ">=0.3.1"

 [dev-dependencies]
 lazy_static = "1.3.0"
 pnet = "0.26.0"
-serde_json = "1.0.55"
+serde_json = "1.0.57"
--- a/net_util/src/lib.rs
+++ b/net_util/src/lib.rs
@@ -11,21 +11,28 @@
 #[macro_use]
 extern crate lazy_static;
 extern crate libc;
+#[macro_use]
+extern crate log;
+extern crate net_gen;
 extern crate rand;
 extern crate serde;
-
-extern crate net_gen;
+extern crate virtio_bindings;
+extern crate vm_memory;
+extern crate vm_virtio;
 extern crate vmm_sys_util;

 mod mac;
+mod open_tap;
+mod queue_pair;
 mod tap;

 use std::io::Error as IoError;
-use std::mem;
-use std::net;
-use std::os::unix::io::FromRawFd;
+use std::os::unix::io::{FromRawFd, RawFd};
+use std::{io, mem, net};

 pub use mac::{MacAddr, MAC_ADDR_LEN};
+pub use open_tap::{open_tap, Error as OpenTapError};
+pub use queue_pair::{NetCounters, NetQueuePair, NetQueuePairError, RxVirtio, TxVirtio};
 pub use tap::{Error as TapError, Tap};

 #[derive(Debug)]
@@ -62,6 +69,39 @@ fn create_socket() -> Result<net::UdpSocket> {
    Ok(unsafe { net::UdpSocket::from_raw_fd(sock) })
 }

+fn vnet_hdr_len() -> usize {
+    use virtio_bindings::bindings::virtio_net::virtio_net_hdr_v1;
+    std::mem::size_of::<virtio_net_hdr_v1>()
+}
+
+pub fn register_listener(
+    epoll_fd: RawFd,
+    fd: RawFd,
+    ev_type: epoll::Events,
+    data: u64,
+) -> std::result::Result<(), io::Error> {
+    epoll::ctl(
+        epoll_fd,
+        epoll::ControlOptions::EPOLL_CTL_ADD,
+        fd,
+        epoll::Event::new(ev_type, data),
+    )
+}
+
+pub fn unregister_listener(
+    epoll_fd: RawFd,
+    fd: RawFd,
+    ev_type: epoll::Events,
+    data: u64,
+) -> std::result::Result<(), io::Error> {
+    epoll::ctl(
+        epoll_fd,
+        epoll::ControlOptions::EPOLL_CTL_DEL,
+        fd,
+        epoll::Event::new(ev_type, data),
+    )
+}
+
 #[cfg(test)]
 mod tests {
    use super::*;
--- a/net_util/src/open_tap.rs
+++ b/net_util/src/open_tap.rs
@@ -0,0 +1,116 @@
+// Copyright (c) 2020 Intel Corporation. All rights reserved.
+//
+// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
+
+use super::{vnet_hdr_len, MacAddr, Tap, TapError};
+use std::net::Ipv4Addr;
+use std::path::Path;
+use std::{fs, io};
+
+#[derive(Debug)]
+pub enum Error {
+    /// Failed to convert an hexadecimal string into an integer.
+    ConvertHexStringToInt(std::num::ParseIntError),
+    /// Error related to the multiqueue support (no support TAP side).
+    MultiQueueNoTapSupport,
+    /// Error related to the multiqueue support (no support device side).
+    MultiQueueNoDeviceSupport,
+    /// Failed to read the TAP flags from sysfs.
+    ReadSysfsTunFlags(io::Error),
+    /// Open tap device failed.
+    TapOpen(TapError),
+    /// Setting tap IP failed.
+    TapSetIp(TapError),
+    /// Setting tap netmask failed.
+    TapSetNetmask(TapError),
+    /// Setting MAC address failed
+    TapSetMac(TapError),
+    /// Getting MAC address failed
+    TapGetMac(TapError),
+    /// Setting tap interface offload flags failed.
+    TapSetOffload(TapError),
+    /// Setting vnet header size failed.
+    TapSetVnetHdrSize(TapError),
+    /// Enabling tap interface failed.
+    TapEnable(TapError),
+}
+
+type Result<T> = std::result::Result<T, Error>;
+
+fn check_mq_support(if_name: &Option<&str>, queue_pairs: usize) -> Result<()> {
+    if let Some(tap_name) = if_name {
+        let mq = queue_pairs > 1;
+        let path = format!("/sys/class/net/{}/tun_flags", tap_name);
+        // interface does not exist, check is not required
+        if !Path::new(&path).exists() {
+            return Ok(());
+        }
+        let tun_flags_str = fs::read_to_string(path).map_err(Error::ReadSysfsTunFlags)?;
+        let tun_flags = u32::from_str_radix(tun_flags_str.trim().trim_start_matches("0x"), 16)
+            .map_err(Error::ConvertHexStringToInt)?;
+        if (tun_flags & net_gen::IFF_MULTI_QUEUE != 0) && !mq {
+            return Err(Error::MultiQueueNoDeviceSupport);
+        } else if (tun_flags & net_gen::IFF_MULTI_QUEUE == 0) && mq {
+            return Err(Error::MultiQueueNoTapSupport);
+        }
+    }
+    Ok(())
+}
+
+/// Create a new virtio network device with the given IP address and
+/// netmask.
+pub fn open_tap(
+    if_name: Option<&str>,
+    ip_addr: Option<Ipv4Addr>,
+    netmask: Option<Ipv4Addr>,
+    host_mac: &mut Option<MacAddr>,
+    num_rx_q: usize,
+) -> Result<Vec<Tap>> {
+    let mut taps: Vec<Tap> = Vec::new();
+    let mut ifname: String = String::new();
+    let vnet_hdr_size = vnet_hdr_len() as i32;
+    let flag = net_gen::TUN_F_CSUM | net_gen::TUN_F_UFO | net_gen::TUN_F_TSO4 | net_gen::TUN_F_TSO6;
+
+    // In case the tap interface already exists, check if the number of
+    // queues is appropriate. The tap might not support multiqueue while
+    // the number of queues indicates the user expects multiple queues, or
+    // on the contrary, the tap might support multiqueue while the number
+    // of queues indicates the user doesn't expect multiple queues.
+    check_mq_support(&if_name, num_rx_q)?;
+
+    for i in 0..num_rx_q {
+        let tap: Tap;
+        if i == 0 {
+            tap = match if_name {
+                Some(name) => Tap::open_named(name, num_rx_q).map_err(Error::TapOpen)?,
+                None => Tap::new(num_rx_q).map_err(Error::TapOpen)?,
+            };
+            if let Some(ip) = ip_addr {
+                tap.set_ip_addr(ip).map_err(Error::TapSetIp)?;
+            }
+            if let Some(mask) = netmask {
+                tap.set_netmask(mask).map_err(Error::TapSetNetmask)?;
+            }
+            if let Some(mac) = host_mac {
+                tap.set_mac_addr(*mac).map_err(Error::TapSetMac)?
+            } else {
+                *host_mac = Some(tap.get_mac_addr().map_err(Error::TapGetMac)?)
+            }
+            tap.enable().map_err(Error::TapEnable)?;
+            tap.set_offload(flag).map_err(Error::TapSetOffload)?;
+
+            tap.set_vnet_hdr_size(vnet_hdr_size)
+                .map_err(Error::TapSetVnetHdrSize)?;
+
+            ifname = String::from_utf8(tap.get_if_name()).unwrap();
+        } else {
+            tap = Tap::open_named(ifname.as_str(), num_rx_q).map_err(Error::TapOpen)?;
+            tap.set_offload(flag).map_err(Error::TapSetOffload)?;
+
+            tap.set_vnet_hdr_size(vnet_hdr_size)
+                .map_err(Error::TapSetVnetHdrSize)?;
+        }
+        taps.push(tap);
+    }
+    Ok(taps)
+}
--- a/net_util/src/queue_pair.rs
+++ b/net_util/src/queue_pair.rs
@@ -0,0 +1,380 @@
+// Copyright (c) 2020 Intel Corporation. All rights reserved.
+//
+// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
+
+use super::{register_listener, unregister_listener, vnet_hdr_len, Tap};
+use libc::EAGAIN;
+use std::cmp;
+use std::io;
+use std::io::{Read, Write};
+use std::num::Wrapping;
+use std::os::unix::io::{AsRawFd, RawFd};
+use std::sync::atomic::{AtomicU64, Ordering};
+use std::sync::Arc;
+use vm_memory::{Bytes, GuestAddress, GuestAddressSpace, GuestMemoryAtomic, GuestMemoryMmap};
+use vm_virtio::{DescriptorChain, Queue};
+
+/// The maximum buffer size when segmentation offload is enabled. This
+/// includes the 12-byte virtio net header.
+/// http://docs.oasis-open.org/virtio/virtio/v1.0/virtio-v1.0.html#x1-1740003
+const MAX_BUFFER_SIZE: usize = 65562;
+
+#[derive(Clone)]
+pub struct TxVirtio {
+    pub iovec: Vec<(GuestAddress, usize)>,
+    pub frame_buf: [u8; MAX_BUFFER_SIZE],
+    pub counter_bytes: Wrapping<u64>,
+    pub counter_frames: Wrapping<u64>,
+}
+
+impl Default for TxVirtio {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl TxVirtio {
+    pub fn new() -> Self {
+        TxVirtio {
+            iovec: Vec::new(),
+            frame_buf: [0u8; MAX_BUFFER_SIZE],
+            counter_bytes: Wrapping(0),
+            counter_frames: Wrapping(0),
+        }
+    }
+
+    pub fn process_desc_chain(&mut self, mem: &GuestMemoryMmap, tap: &mut Tap, queue: &mut Queue) {
+        while let Some(avail_desc) = queue.iter(&mem).next() {
+            let head_index = avail_desc.index;
+            let mut read_count = 0;
+            let mut next_desc = Some(avail_desc);
+
+            self.iovec.clear();
+            while let Some(desc) = next_desc {
+                if desc.is_write_only() {
+                    break;
+                }
+                self.iovec.push((desc.addr, desc.len as usize));
+                read_count += desc.len as usize;
+                next_desc = desc.next_descriptor();
+            }
+
+            read_count = 0;
+            // Copy buffer from across multiple descriptors.
+            // TODO(performance - Issue #420): change this to use `writev()` instead of `write()`
+            // and get rid of the intermediate buffer.
+            for (desc_addr, desc_len) in self.iovec.drain(..) {
+                let limit = cmp::min((read_count + desc_len) as usize, self.frame_buf.len());
+
+                let read_result =
+                    mem.read_slice(&mut self.frame_buf[read_count..limit as usize], desc_addr);
+                match read_result {
+                    Ok(_) => {
+                        // Increment by number of bytes actually read
+                        read_count += limit - read_count;
+                    }
+                    Err(e) => {
+                        println!("Failed to read slice: {:?}", e);
+                        break;
+                    }
+                }
+            }
+
+            let write_result = tap.write(&self.frame_buf[..read_count]);
+            match write_result {
+                Ok(_) => {}
+                Err(e) => {
+                    println!("net: tx: error failed to write to tap: {}", e);
+                }
+            };
+
+            self.counter_bytes += Wrapping((read_count - vnet_hdr_len()) as u64);
+            self.counter_frames += Wrapping(1);
+
+            queue.add_used(&mem, head_index, 0);
+            queue.update_avail_event(&mem);
+        }
+    }
+}
+
+#[derive(Clone)]
+pub struct RxVirtio {
+    pub deferred_frame: bool,
+    pub deferred_irqs: bool,
+    pub bytes_read: usize,
+    pub frame_buf: [u8; MAX_BUFFER_SIZE],
+    pub counter_bytes: Wrapping<u64>,
+    pub counter_frames: Wrapping<u64>,
+}
+
+impl Default for RxVirtio {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl RxVirtio {
+    pub fn new() -> Self {
+        RxVirtio {
+            deferred_frame: false,
+            deferred_irqs: false,
+            bytes_read: 0,
+            frame_buf: [0u8; MAX_BUFFER_SIZE],
+            counter_bytes: Wrapping(0),
+            counter_frames: Wrapping(0),
+        }
+    }
+
+    pub fn process_desc_chain(
+        &mut self,
+        mem: &GuestMemoryMmap,
+        mut next_desc: Option<DescriptorChain>,
+        queue: &mut Queue,
+    ) -> bool {
+        let head_index = next_desc.as_ref().unwrap().index;
+        let mut write_count = 0;
+
+        // Copy from frame into buffer, which may span multiple descriptors.
+        loop {
+            match next_desc {
+                Some(desc) => {
+                    if !desc.is_write_only() {
+                        break;
+                    }
+                    let limit = cmp::min(write_count + desc.len as usize, self.bytes_read);
+                    let source_slice = &self.frame_buf[write_count..limit];
+                    let write_result = mem.write_slice(source_slice, desc.addr);
+
+                    match write_result {
+                        Ok(_) => {
+                            write_count = limit;
+                        }
+                        Err(e) => {
+                            error!("Failed to write slice: {:?}", e);
+                            break;
+                        }
+                    };
+
+                    if write_count >= self.bytes_read {
+                        break;
+                    }
+                    next_desc = desc.next_descriptor();
+                }
+                None => {
+                    warn!("Receiving buffer is too small to hold frame of current size");
+                    break;
+                }
+            }
+        }
+
+        self.counter_bytes += Wrapping((write_count - vnet_hdr_len()) as u64);
+        self.counter_frames += Wrapping(1);
+
+        queue.add_used(&mem, head_index, write_count as u32);
+        queue.update_avail_event(&mem);
+
+        // Mark that we have at least one pending packet and we need to interrupt the guest.
+        self.deferred_irqs = true;
+
+        // Update the frame_buf buffer.
+        if write_count < self.bytes_read {
+            self.frame_buf.copy_within(write_count..self.bytes_read, 0);
+            self.bytes_read -= write_count;
+            false
+        } else {
+            self.bytes_read = 0;
+            true
+        }
+    }
+}
+
+#[derive(Default, Clone)]
+pub struct NetCounters {
+    pub tx_bytes: Arc<AtomicU64>,
+    pub tx_frames: Arc<AtomicU64>,
+    pub rx_bytes: Arc<AtomicU64>,
+    pub rx_frames: Arc<AtomicU64>,
+}
+
+#[derive(Debug)]
+pub enum NetQueuePairError {
+    /// No memory configured
+    NoMemoryConfigured,
+    /// Error registering listener
+    RegisterListener(io::Error),
+    /// Error unregistering listener
+    UnregisterListener(io::Error),
+    /// Error reading from the TAP device
+    FailedReadTap,
+}
+
+pub struct NetQueuePair {
+    pub mem: Option<GuestMemoryAtomic<GuestMemoryMmap>>,
+    pub tap: Tap,
+    pub rx: RxVirtio,
+    pub tx: TxVirtio,
+    pub epoll_fd: Option<RawFd>,
+    pub rx_tap_listening: bool,
+    pub counters: NetCounters,
+    pub tap_event_id: u16,
+}
+
+impl NetQueuePair {
+    // Copies a single frame from `self.rx.frame_buf` into the guest. Returns true
+    // if a buffer was used, and false if the frame must be deferred until a buffer
+    // is made available by the driver.
+    fn rx_single_frame(&mut self, mut queue: &mut Queue) -> Result<bool, NetQueuePairError> {
+        let mem = self
+            .mem
+            .as_ref()
+            .ok_or(NetQueuePairError::NoMemoryConfigured)
+            .map(|m| m.memory())?;
+        let next_desc = queue.iter(&mem).next();
+
+        if next_desc.is_none() {
+            // Queue has no available descriptors
+            if self.rx_tap_listening {
+                unregister_listener(
+                    self.epoll_fd.unwrap(),
+                    self.tap.as_raw_fd(),
+                    epoll::Events::EPOLLIN,
+                    u64::from(self.tap_event_id),
+                )
+                .map_err(NetQueuePairError::UnregisterListener)?;
+                self.rx_tap_listening = false;
+                info!("Listener unregistered");
+            }
+            return Ok(false);
+        }
+
+        Ok(self.rx.process_desc_chain(&mem, next_desc, &mut queue))
+    }
+
+    fn process_rx(&mut self, queue: &mut Queue) -> Result<bool, NetQueuePairError> {
+        // Read as many frames as possible.
+        loop {
+            match self.read_tap() {
+                Ok(count) => {
+                    self.rx.bytes_read = count;
+                    if !self.rx_single_frame(queue)? {
+                        self.rx.deferred_frame = true;
+                        break;
+                    }
+                }
+                Err(e) => {
+                    // The tap device is non-blocking, so any error aside from EAGAIN is
+                    // unexpected.
+                    match e.raw_os_error() {
+                        Some(err) if err == EAGAIN => (),
+                        _ => {
+                            error!("Failed to read tap: {:?}", e);
+                            return Err(NetQueuePairError::FailedReadTap);
+                        }
+                    };
+                    break;
+                }
+            }
+        }
+
+        // Consume the counters from the Rx/Tx queues and accumulate into
+        // the counters for the device as whole. This consumption is needed
+        // to handle MQ.
+        self.counters
+            .rx_bytes
+            .fetch_add(self.rx.counter_bytes.0, Ordering::AcqRel);
+        self.counters
+            .rx_frames
+            .fetch_add(self.rx.counter_frames.0, Ordering::AcqRel);
+        self.rx.counter_bytes = Wrapping(0);
+        self.rx.counter_frames = Wrapping(0);
+
+        if self.rx.deferred_irqs {
+            self.rx.deferred_irqs = false;
+            let mem = self
+                .mem
+                .as_ref()
+                .ok_or(NetQueuePairError::NoMemoryConfigured)
+                .map(|m| m.memory())?;
+            Ok(queue.needs_notification(&mem, queue.next_used))
+        } else {
+            Ok(false)
+        }
+    }
+
+    pub fn resume_rx(&mut self, queue: &mut Queue) -> Result<bool, NetQueuePairError> {
+        if !self.rx_tap_listening {
+            register_listener(
+                self.epoll_fd.unwrap(),
+                self.tap.as_raw_fd(),
+                epoll::Events::EPOLLIN,
+                u64::from(self.tap_event_id),
+            )
+            .map_err(NetQueuePairError::RegisterListener)?;
+            self.rx_tap_listening = true;
+            info!("Listener registered");
+        }
+        if self.rx.deferred_frame {
+            if self.rx_single_frame(queue)? {
+                self.rx.deferred_frame = false;
+                // process_rx() was interrupted possibly before consuming all
+                // packets in the tap; try continuing now.
+                self.process_rx(queue)
+            } else if self.rx.deferred_irqs {
+                self.rx.deferred_irqs = false;
+                let mem = self
+                    .mem
+                    .as_ref()
+                    .ok_or(NetQueuePairError::NoMemoryConfigured)
+                    .map(|m| m.memory())?;
+                Ok(queue.needs_notification(&mem, queue.next_used))
+            } else {
+                Ok(false)
+            }
+        } else {
+            Ok(false)
+        }
+    }
+
+    pub fn process_tx(&mut self, mut queue: &mut Queue) -> Result<bool, NetQueuePairError> {
+        let mem = self
+            .mem
+            .as_ref()
+            .ok_or(NetQueuePairError::NoMemoryConfigured)
+            .map(|m| m.memory())?;
+        self.tx.process_desc_chain(&mem, &mut self.tap, &mut queue);
+
+        self.counters
+            .tx_bytes
+            .fetch_add(self.tx.counter_bytes.0, Ordering::AcqRel);
+        self.counters
+            .tx_frames
+            .fetch_add(self.tx.counter_frames.0, Ordering::AcqRel);
+        self.tx.counter_bytes = Wrapping(0);
+        self.tx.counter_frames = Wrapping(0);
+
+        Ok(queue.needs_notification(&mem, queue.next_used))
+    }
+
+    pub fn process_rx_tap(&mut self, mut queue: &mut Queue) -> Result<bool, NetQueuePairError> {
+        if self.rx.deferred_frame
+        // Process a deferred frame first if available. Don't read from tap again
+        // until we manage to receive this deferred frame.
+        {
+            if self.rx_single_frame(&mut queue)? {
+                self.rx.deferred_frame = false;
+                self.process_rx(&mut queue)
+            } else if self.rx.deferred_irqs {
+                self.rx.deferred_irqs = false;
+                Ok(true)
+            } else {
+                Ok(false)
+            }
+        } else {
+            self.process_rx(&mut queue)
+        }
+    }
+
+    fn read_tap(&mut self) -> io::Result<usize> {
+        self.tap.read(&mut self.rx.frame_buf)
+    }
+}
--- a/option_parser/Cargo.toml
+++ b/option_parser/Cargo.toml
@@ -0,0 +1,5 @@
+[package]
+name = "option_parser"
+version = "0.1.0"
+authors = ["The Cloud Hypervisor Authors"]
+edition = "2018"
--- a/option_parser/src/lib.rs
+++ b/option_parser/src/lib.rs
@@ -0,0 +1,172 @@
+// Copyright © 2020 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+use std::collections::HashMap;
+use std::fmt;
+use std::str::FromStr;
+
+#[derive(Default)]
+pub struct OptionParser {
+    options: HashMap<String, OptionParserValue>,
+}
+
+struct OptionParserValue {
+    value: Option<String>,
+    requires_value: bool,
+}
+
+#[derive(Debug)]
+pub enum OptionParserError {
+    UnknownOption(String),
+    InvalidSyntax(String),
+    Conversion(String, String),
+}
+
+impl fmt::Display for OptionParserError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            OptionParserError::UnknownOption(s) => write!(f, "unknown option: {}", s),
+            OptionParserError::InvalidSyntax(s) => write!(f, "invalid syntax:{}", s),
+            OptionParserError::Conversion(field, value) => {
+                write!(f, "unable to parse {} for {}", value, field)
+            }
+        }
+    }
+}
+type OptionParserResult<T> = std::result::Result<T, OptionParserError>;
+
+impl OptionParser {
+    pub fn new() -> Self {
+        Self {
+            options: HashMap::new(),
+        }
+    }
+
+    pub fn parse(&mut self, input: &str) -> OptionParserResult<()> {
+        if input.trim().is_empty() {
+            return Ok(());
+        }
+
+        let options_list: Vec<&str> = input.trim().split(',').collect();
+
+        for option in options_list.iter() {
+            let parts: Vec<&str> = option.split('=').collect();
+
+            match self.options.get_mut(parts[0]) {
+                None => return Err(OptionParserError::UnknownOption(parts[0].to_owned())),
+                Some(value) => {
+                    if value.requires_value {
+                        if parts.len() != 2 {
+                            return Err(OptionParserError::InvalidSyntax((*option).to_owned()));
+                        }
+                        value.value = Some(parts[1].trim().to_owned());
+                    } else {
+                        value.value = Some(String::new());
+                    }
+                }
+            }
+        }
+
+        Ok(())
+    }
+
+    pub fn add(&mut self, option: &str) -> &mut Self {
+        self.options.insert(
+            option.to_owned(),
+            OptionParserValue {
+                value: None,
+                requires_value: true,
+            },
+        );
+
+        self
+    }
+
+    pub fn add_valueless(&mut self, option: &str) -> &mut Self {
+        self.options.insert(
+            option.to_owned(),
+            OptionParserValue {
+                value: None,
+                requires_value: false,
+            },
+        );
+
+        self
+    }
+
+    pub fn get(&self, option: &str) -> Option<String> {
+        self.options
+            .get(option)
+            .and_then(|v| v.value.clone())
+            .and_then(|s| if s.is_empty() { None } else { Some(s) })
+    }
+
+    pub fn is_set(&self, option: &str) -> bool {
+        self.options
+            .get(option)
+            .and_then(|v| v.value.as_ref())
+            .is_some()
+    }
+
+    pub fn convert<T: FromStr>(&self, option: &str) -> OptionParserResult<Option<T>> {
+        match self.get(option) {
+            None => Ok(None),
+            Some(v) => Ok(Some(v.parse().map_err(|_| {
+                OptionParserError::Conversion(option.to_owned(), v.to_owned())
+            })?)),
+        }
+    }
+}
+
+pub struct Toggle(pub bool);
+
+pub enum ToggleParseError {
+    InvalidValue(String),
+}
+
+impl FromStr for Toggle {
+    type Err = ToggleParseError;
+
+    fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
+        match s.to_lowercase().as_str() {
+            "" => Ok(Toggle(false)),
+            "on" => Ok(Toggle(true)),
+            "off" => Ok(Toggle(false)),
+            "true" => Ok(Toggle(true)),
+            "false" => Ok(Toggle(false)),
+            _ => Err(ToggleParseError::InvalidValue(s.to_owned())),
+        }
+    }
+}
+
+pub struct ByteSized(pub u64);
+
+pub enum ByteSizedParseError {
+    InvalidValue(String),
+}
+
+impl FromStr for ByteSized {
+    type Err = ByteSizedParseError;
+
+    fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
+        Ok(ByteSized({
+            let s = s.trim();
+            let shift = if s.ends_with('K') {
+                10
+            } else if s.ends_with('M') {
+                20
+            } else if s.ends_with('G') {
+                30
+            } else {
+                0
+            };
+
+            let s = s.trim_end_matches(|c| c == 'K' || c == 'M' || c == 'G');
+            s.parse::<u64>()
+                .map_err(|_| ByteSizedParseError::InvalidValue(s.to_owned()))?
+                << shift
+        }))
+    }
+}
--- a/pci/Cargo.toml
+++ b/pci/Cargo.toml
@@ -8,12 +8,11 @@ edition = "2018"
 anyhow = "1.0"
 byteorder = "1.3.4"
 devices = { path = "../devices" }
-kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch" }
-kvm-ioctls = { git = "https://github.com/cloud-hypervisor/kvm-ioctls", branch = "ch" }
+hypervisor = { path = "../hypervisor" }
 vfio-ioctls = { git = "https://github.com/cloud-hypervisor/vfio-ioctls", branch = "ch" }
 vmm-sys-util = ">=0.3.1"
-libc = "0.2.71"
-log = "0.4.8"
+libc = "0.2.74"
+log = "0.4.11"
 serde = {version = ">=1.0.27", features = ["rc"] }
 serde_derive = ">=1.0.27"
 serde_json = ">=1.0.9"
@@ -23,5 +22,5 @@ vm-memory = "0.2.1"
 vm-migration = { path = "../vm-migration" }

 [dependencies.vfio-bindings]
-git = "https://github.com/rust-vmm/vfio-bindings"
+version = "0.2.0"
 features = ["fam-wrappers"]
--- a/pci/src/bus.rs
+++ b/pci/src/bus.rs
@@ -110,16 +110,19 @@ impl PciBus {
    pub fn register_mapping(
        &self,
        dev: Arc<Mutex<dyn BusDevice>>,
-        io_bus: &devices::Bus,
+        #[cfg(target_arch = "x86_64")] io_bus: &devices::Bus,
        mmio_bus: &devices::Bus,
        bars: Vec<(GuestAddress, GuestUsize, PciBarRegionType)>,
    ) -> Result<()> {
        for (address, size, type_) in bars {
            match type_ {
                PciBarRegionType::IORegion => {
+                    #[cfg(target_arch = "x86_64")]
                    io_bus
                        .insert(dev.clone(), address.raw_value(), size)
                        .map_err(PciRootError::PioInsert)?;
+                    #[cfg(target_arch = "aarch64")]
+                    error!("I/O region is not supported");
                }
                PciBarRegionType::Memory32BitRegion | PciBarRegionType::Memory64BitRegion => {
                    mmio_bus
--- a/pci/src/configuration.rs
+++ b/pci/src/configuration.rs
@@ -277,14 +277,19 @@ fn decode_64_bits_bar_size(bar_size_hi: u32, bar_size_lo: u32) -> Option<u64> {
    None
 }

+#[derive(Serialize, Deserialize, Default, Clone, Copy)]
+struct PciBar {
+    addr: u32,
+    size: u32,
+    used: bool,
+    r#type: Option<PciBarRegionType>,
+}
+
 #[derive(Serialize, Deserialize)]
 struct PciConfigurationState {
    registers: Vec<u32>,
    writable_bits: Vec<u32>,
-    bar_addr: Vec<u32>,
-    bar_size: Vec<u32>,
-    bar_used: Vec<bool>,
-    bar_type: Vec<Option<PciBarRegionType>>,
+    bars: Vec<PciBar>,
    rom_bar_addr: u32,
    rom_bar_size: u32,
    rom_bar_used: bool,
@@ -298,10 +303,7 @@ struct PciConfigurationState {
 pub struct PciConfiguration {
    registers: [u32; NUM_CONFIGURATION_REGISTERS],
    writable_bits: [u32; NUM_CONFIGURATION_REGISTERS], // writable bits for each register.
-    bar_addr: [u32; NUM_BAR_REGS],
-    bar_size: [u32; NUM_BAR_REGS],
-    bar_used: [bool; NUM_BAR_REGS],
-    bar_type: [Option<PciBarRegionType>; NUM_BAR_REGS],
+    bars: [PciBar; NUM_BAR_REGS],
    rom_bar_addr: u32,
    rom_bar_size: u32,
    rom_bar_used: bool,
@@ -404,8 +406,6 @@ impl PciConfiguration {
    ) -> Self {
        let mut registers = [0u32; NUM_CONFIGURATION_REGISTERS];
        let mut writable_bits = [0u32; NUM_CONFIGURATION_REGISTERS];
-        let bar_addr = [0u32; NUM_BAR_REGS];
-        let bar_size = [0u32; NUM_BAR_REGS];
        registers[0] = u32::from(device_id) << 16 | u32::from(vendor_id);
        // TODO(dverkamp): Status should be write-1-to-clear
        writable_bits[1] = 0x0000_ffff; // Status (r/o), command (r/w)
@@ -432,13 +432,12 @@ impl PciConfiguration {
        };
        registers[11] = u32::from(subsystem_id) << 16 | u32::from(subsystem_vendor_id);

+        let bars = [PciBar::default(); NUM_BAR_REGS];
+
        PciConfiguration {
            registers,
            writable_bits,
-            bar_addr,
-            bar_size,
-            bar_used: [false; NUM_BAR_REGS],
-            bar_type: [None; NUM_BAR_REGS],
+            bars,
            rom_bar_addr: 0,
            rom_bar_size: 0,
            rom_bar_used: false,
@@ -452,10 +451,7 @@ impl PciConfiguration {
        PciConfigurationState {
            registers: self.registers.to_vec(),
            writable_bits: self.writable_bits.to_vec(),
-            bar_addr: self.bar_addr.to_vec(),
-            bar_size: self.bar_size.to_vec(),
-            bar_used: self.bar_used.to_vec(),
-            bar_type: self.bar_type.to_vec(),
+            bars: self.bars.to_vec(),
            rom_bar_addr: self.rom_bar_addr,
            rom_bar_size: self.rom_bar_size,
            rom_bar_used: self.rom_bar_used,
@@ -468,10 +464,7 @@ impl PciConfiguration {
        self.registers.clone_from_slice(state.registers.as_slice());
        self.writable_bits
            .clone_from_slice(state.writable_bits.as_slice());
-        self.bar_addr.clone_from_slice(state.bar_addr.as_slice());
-        self.bar_size.clone_from_slice(state.bar_size.as_slice());
-        self.bar_used.clone_from_slice(state.bar_used.as_slice());
-        self.bar_type.clone_from_slice(state.bar_type.as_slice());
+        self.bars.clone_from_slice(state.bars.as_slice());
        self.rom_bar_addr = state.rom_bar_addr;
        self.rom_bar_size = state.rom_bar_size;
        self.rom_bar_used = state.rom_bar_used;
@@ -492,7 +485,7 @@ impl PciConfiguration {
            // Handle very specific case where the BAR is being written with
            // all 1's to retrieve the BAR size during next BAR reading.
            if value == 0xffff_ffff {
-                mask &= self.bar_size[reg_idx - 4];
+                mask &= self.bars[reg_idx - 4].size;
            }
        } else if reg_idx == ROM_BAR_REG {
            // Handle very specific case where the BAR is being written with
@@ -561,7 +554,7 @@ impl PciConfiguration {
    /// (i.e, region size must be power of two, register not already used). Returns 'None' on
    /// failure all, `Some(BarIndex)` on success.
    pub fn add_pci_bar(&mut self, config: &PciBarConfiguration) -> Result<usize> {
-        if self.bar_used[config.reg_idx] {
+        if self.bars[config.reg_idx].used {
            return Err(Error::BarInUse(config.reg_idx));
        }

@@ -586,7 +579,7 @@ impl PciConfiguration {

                // Encode the BAR size as expected by the software running in
                // the guest.
-                self.bar_size[config.reg_idx] =
+                self.bars[config.reg_idx].size =
                    encode_32_bits_bar_size(config.size as u32).ok_or(Error::Encode32BarSize)?;
            }
            PciBarRegionType::Memory64BitRegion => {
@@ -598,7 +591,7 @@ impl PciConfiguration {
                    return Err(Error::BarAddressInvalid(config.addr, config.size));
                }

-                if self.bar_used[config.reg_idx + 1] {
+                if self.bars[config.reg_idx + 1].used {
                    return Err(Error::BarInUse64(config.reg_idx));
                }

@@ -609,10 +602,10 @@ impl PciConfiguration {

                self.registers[bar_idx + 1] = (config.addr >> 32) as u32;
                self.writable_bits[bar_idx + 1] = 0xffff_ffff;
-                self.bar_addr[config.reg_idx + 1] = self.registers[bar_idx + 1];
-                self.bar_size[config.reg_idx] = bar_size_lo;
-                self.bar_size[config.reg_idx + 1] = bar_size_hi;
-                self.bar_used[config.reg_idx + 1] = true;
+                self.bars[config.reg_idx + 1].addr = self.registers[bar_idx + 1];
+                self.bars[config.reg_idx].size = bar_size_lo;
+                self.bars[config.reg_idx + 1].size = bar_size_hi;
+                self.bars[config.reg_idx + 1].used = true;
            }
        }

@@ -626,9 +619,9 @@ impl PciConfiguration {

        self.registers[bar_idx] = ((config.addr as u32) & mask) | lower_bits;
        self.writable_bits[bar_idx] = mask;
-        self.bar_addr[config.reg_idx] = self.registers[bar_idx];
-        self.bar_used[config.reg_idx] = true;
-        self.bar_type[config.reg_idx] = Some(config.region_type);
+        self.bars[config.reg_idx].addr = self.registers[bar_idx];
+        self.bars[config.reg_idx].used = true;
+        self.bars[config.reg_idx].r#type = Some(config.region_type);
        Ok(config.reg_idx)
    }

@@ -668,11 +661,11 @@ impl PciConfiguration {
    pub fn get_bar_addr(&self, bar_num: usize) -> u64 {
        let bar_idx = BAR0_REG + bar_num;

-        let mut addr = u64::from(self.bar_addr[bar_num] & self.writable_bits[bar_idx]);
+        let mut addr = u64::from(self.bars[bar_num].addr & self.writable_bits[bar_idx]);

-        if let Some(bar_type) = self.bar_type[bar_num] {
+        if let Some(bar_type) = self.bars[bar_num].r#type {
            if bar_type == PciBarRegionType::Memory64BitRegion {
-                addr |= u64::from(self.bar_addr[bar_num + 1]) << 32;
+                addr |= u64::from(self.bars[bar_num + 1].addr) << 32;
            }
        }

@@ -777,11 +770,11 @@ impl PciConfiguration {
        let mask = self.writable_bits[reg_idx];
        if reg_idx >= BAR0_REG && reg_idx < BAR0_REG + NUM_BAR_REGS {
            let bar_idx = reg_idx - 4;
-            if (value & mask) != (self.bar_addr[bar_idx] & mask) {
+            if (value & mask) != (self.bars[bar_idx].addr & mask) {
                // Handle special case where the address being written is
                // different from the address initially provided. This is a
                // BAR reprogramming case which needs to be properly caught.
-                if let Some(bar_type) = self.bar_type[bar_idx] {
+                if let Some(bar_type) = self.bars[bar_idx].r#type {
                    match bar_type {
                        PciBarRegionType::Memory64BitRegion => {}
                        _ => {
@@ -795,16 +788,16 @@ impl PciConfiguration {
                                "DETECT BAR REPROG: current 0x{:x}, new 0x{:x}",
                                self.registers[reg_idx], value
                            );
-                            let old_base = u64::from(self.bar_addr[bar_idx] & mask);
+                            let old_base = u64::from(self.bars[bar_idx].addr & mask);
                            let new_base = u64::from(value & mask);
                            let len = u64::from(
-                                decode_32_bits_bar_size(self.bar_size[bar_idx])
+                                decode_32_bits_bar_size(self.bars[bar_idx].size)
                                    .ok_or(Error::Decode32BarSize)
                                    .unwrap(),
                            );
                            let region_type = bar_type;

-                            self.bar_addr[bar_idx] = value;
+                            self.bars[bar_idx].addr = value;

                            return Some(BarReprogrammingParams {
                                old_base,
@@ -816,7 +809,7 @@ impl PciConfiguration {
                    }
                } else if (reg_idx > BAR0_REG)
                    && (self.registers[reg_idx - 1] & self.writable_bits[reg_idx - 1])
-                        != (self.bar_addr[bar_idx - 1] & self.writable_bits[reg_idx - 1])
+                        != (self.bars[bar_idx - 1].addr & self.writable_bits[reg_idx - 1])
                {
                    // Ignore the case where the BAR size is being asked for.
                    // Because we are in the 64bits case here, we have to check
@@ -824,7 +817,7 @@ impl PciConfiguration {
                    // asked for the BAR size too.
                    if value == 0xffff_ffff
                        && self.registers[reg_idx - 1] & self.writable_bits[reg_idx - 1]
-                            == self.bar_size[bar_idx - 1] & self.writable_bits[reg_idx - 1]
+                            == self.bars[bar_idx - 1].size & self.writable_bits[reg_idx - 1]
                    {
                        return None;
                    }
@@ -833,18 +826,20 @@ impl PciConfiguration {
                        "DETECT BAR REPROG: current 0x{:x}, new 0x{:x}",
                        self.registers[reg_idx], value
                    );
-                    let old_base = u64::from(self.bar_addr[bar_idx] & mask) << 32
-                        | u64::from(self.bar_addr[bar_idx - 1] & self.writable_bits[reg_idx - 1]);
+                    let old_base = u64::from(self.bars[bar_idx].addr & mask) << 32
+                        | u64::from(self.bars[bar_idx - 1].addr & self.writable_bits[reg_idx - 1]);
                    let new_base = u64::from(value & mask) << 32
                        | u64::from(self.registers[reg_idx - 1] & self.writable_bits[reg_idx - 1]);
-                    let len =
-                        decode_64_bits_bar_size(self.bar_size[bar_idx], self.bar_size[bar_idx - 1])
-                            .ok_or(Error::Decode64BarSize)
-                            .unwrap();
+                    let len = decode_64_bits_bar_size(
+                        self.bars[bar_idx].size,
+                        self.bars[bar_idx - 1].size,
+                    )
+                    .ok_or(Error::Decode64BarSize)
+                    .unwrap();
                    let region_type = PciBarRegionType::Memory64BitRegion;

-                    self.bar_addr[bar_idx] = value;
-                    self.bar_addr[bar_idx - 1] = self.registers[reg_idx - 1];
+                    self.bars[bar_idx].addr = value;
+                    self.bars[bar_idx - 1].addr = self.registers[reg_idx - 1];

                    return Some(BarReprogrammingParams {
                        old_base,
--- a/pci/src/lib.rs
+++ b/pci/src/lib.rs
@@ -6,6 +6,7 @@
 #[macro_use]
 extern crate log;
 extern crate devices;
+extern crate hypervisor;
 extern crate serde;
 #[macro_use]
 extern crate serde_derive;
--- a/pci/src/msi.rs
+++ b/pci/src/msi.rs
@@ -201,6 +201,7 @@ impl MsiConfig {
                    high_addr: self.cap.msg_addr_hi,
                    low_addr: self.cap.msg_addr_lo,
                    data: self.cap.msg_data as u32,
+                    devid: 0,
                };

                if let Err(e) = self
--- a/pci/src/msix.rs
+++ b/pci/src/msix.rs
@@ -72,6 +72,7 @@ struct MsixConfigState {
 pub struct MsixConfig {
    pub table_entries: Vec<MsixTableEntry>,
    pub pba_entries: Vec<u64>,
+    pub devid: u32,
    interrupt_source_group: Arc<Box<dyn InterruptSourceGroup>>,
    masked: bool,
    enabled: bool,
@@ -81,6 +82,7 @@ impl MsixConfig {
    pub fn new(
        msix_vectors: u16,
        interrupt_source_group: Arc<Box<dyn InterruptSourceGroup>>,
+        devid: u32,
    ) -> Self {
        assert!(msix_vectors <= MAX_MSIX_VECTORS_PER_DEVICE);

@@ -93,6 +95,7 @@ impl MsixConfig {
        MsixConfig {
            table_entries,
            pba_entries,
+            devid,
            interrupt_source_group,
            masked: false,
            enabled: false,
@@ -124,6 +127,7 @@ impl MsixConfig {
                    high_addr: table_entry.msg_addr_hi,
                    low_addr: table_entry.msg_addr_lo,
                    data: table_entry.msg_data,
+                    devid: self.devid,
                };

                self.interrupt_source_group
@@ -162,6 +166,7 @@ impl MsixConfig {
                        high_addr: table_entry.msg_addr_hi,
                        low_addr: table_entry.msg_addr_lo,
                        data: table_entry.msg_data,
+                        devid: self.devid,
                    };

                    if let Err(e) = self
@@ -306,6 +311,7 @@ impl MsixConfig {
                high_addr: table_entry.msg_addr_hi,
                low_addr: table_entry.msg_addr_lo,
                data: table_entry.msg_data,
+                devid: self.devid,
            };

            if let Err(e) = self.interrupt_source_group.update(
--- a/pci/src/vfio.rs
+++ b/pci/src/vfio.rs
@@ -13,8 +13,6 @@ use crate::{
 };
 use byteorder::{ByteOrder, LittleEndian};
 use devices::BusDevice;
-use kvm_bindings::kvm_userspace_memory_region;
-use kvm_ioctls::*;
 use std::any::Any;
 use std::ops::Deref;
 use std::os::unix::io::AsRawFd;
@@ -38,10 +36,10 @@ pub enum VfioPciError {
    AllocateGsi,
    EventFd(io::Error),
    InterruptSourceGroupCreate(io::Error),
-    IrqFd(kvm_ioctls::Error),
+    IrqFd(hypervisor::HypervisorVmError),
    NewVfioPciDevice,
-    MapRegionGuest(kvm_ioctls::Error),
-    SetGsiRouting(kvm_ioctls::Error),
+    MapRegionGuest(anyhow::Error),
+    SetGsiRouting(hypervisor::HypervisorVmError),
    MsiNotConfigured,
    MsixNotConfigured,
    UpdateMemory(VfioError),
@@ -281,7 +279,7 @@ impl VfioPciConfig {
 /// The VMM creates a VfioDevice, then assigns it to a VfioPciDevice,
 /// which then gets added to the PCI bus.
 pub struct VfioPciDevice {
-    vm_fd: Arc<VmFd>,
+    vm: Arc<dyn hypervisor::Vm>,
    device: Arc<VfioDevice>,
    vfio_pci_configuration: VfioPciConfig,
    configuration: PciConfiguration,
@@ -293,7 +291,7 @@ pub struct VfioPciDevice {
 impl VfioPciDevice {
    /// Constructs a new Vfio Pci device for the given Vfio device
    pub fn new(
-        vm_fd: &Arc<VmFd>,
+        vm: &Arc<dyn hypervisor::Vm>,
        device: VfioDevice,
        interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = MsiIrqGroupConfig>>,
        mem: GuestMemoryAtomic<GuestMemoryMmap>,
@@ -317,7 +315,7 @@ impl VfioPciDevice {
        let vfio_pci_configuration = VfioPciConfig::new(Arc::clone(&device));

        let mut vfio_pci_device = VfioPciDevice {
-            vm_fd: vm_fd.clone(),
+            vm: vm.clone(),
            device,
            configuration,
            vfio_pci_configuration,
@@ -364,7 +362,7 @@ impl VfioPciDevice {
            })
            .unwrap();

-        let msix_config = MsixConfig::new(msix_cap.table_size(), interrupt_source_group.clone());
+        let msix_config = MsixConfig::new(msix_cap.table_size(), interrupt_source_group.clone(), 0);

        self.interrupt.msix = Some(VfioMsix {
            bar: msix_config,
@@ -512,7 +510,7 @@ impl VfioPciDevice {
    /// # Return value
    ///
    /// This function returns the updated KVM memory slot id.
-    pub fn map_mmio_regions<F>(&mut self, vm: &Arc<VmFd>, mem_slot: F) -> Result<()>
+    pub fn map_mmio_regions<F>(&mut self, vm: &Arc<dyn hypervisor::Vm>, mem_slot: F) -> Result<()>
    where
        F: Fn() -> u32,
    {
@@ -561,19 +559,16 @@ impl VfioPciDevice {
                }

                let slot = mem_slot();
-                let mem_region = kvm_userspace_memory_region {
+                let mem_region = vm.make_user_memory_region(
                    slot,
-                    guest_phys_addr: region.start.raw_value() + mmap_offset,
-                    memory_size: mmap_size as u64,
-                    userspace_addr: host_addr as u64,
-                    flags: 0,
-                };
+                    region.start.raw_value() + mmap_offset,
+                    mmap_size as u64,
+                    host_addr as u64,
+                    false,
+                );

-                // Safe because the guest regions are guaranteed not to overlap.
-                unsafe {
-                    vm.set_user_memory_region(mem_region)
-                        .map_err(VfioPciError::MapRegionGuest)?;
-                }
+                vm.set_user_memory_region(mem_region)
+                    .map_err(|e| VfioPciError::MapRegionGuest(e.into()))?;

                // Update the region with memory mapped info.
                region.mem_slot = Some(slot);
@@ -593,15 +588,15 @@ impl VfioPciDevice {
                let (mmap_offset, _) = self.device.get_region_mmap(region.index);

                // Remove region from KVM
-                let kvm_region = kvm_userspace_memory_region {
-                    slot: mem_slot,
-                    guest_phys_addr: region.start.raw_value() + mmap_offset,
-                    memory_size: 0,
-                    userspace_addr: host_addr,
-                    flags: 0,
-                };
-                // Safe because the guest regions are guaranteed not to overlap.
-                if let Err(e) = unsafe { self.vm_fd.set_user_memory_region(kvm_region) } {
+                let kvm_region = self.vm.make_user_memory_region(
+                    mem_slot,
+                    region.start.raw_value() + mmap_offset,
+                    0,
+                    host_addr as u64,
+                    false,
+                );
+
+                if let Err(e) = self.vm.set_user_memory_region(kvm_region) {
                    error!(
                        "Could not remove the userspace memory region from KVM: {}",
                        e
@@ -645,7 +640,7 @@ impl Drop for VfioPciDevice {

        if self
            .device
-            .setup_dma_map(self.mem.memory().deref())
+            .unset_dma_map(self.mem.memory().deref())
            .is_err()
        {
            error!("failed to remove all guest memory regions from iommu table");
@@ -748,20 +743,25 @@ impl PciDevice for VfioPciDevice {
            let mut region_type = PciBarRegionType::Memory32BitRegion;

            if io_bar {
-                // IO BAR
-                region_type = PciBarRegionType::IORegion;
+                #[cfg(target_arch = "x86_64")]
+                {
+                    // IO BAR
+                    region_type = PciBarRegionType::IORegion;

-                // Clear first bit.
-                lsb_size &= 0xffff_fffc;
+                    // Clear first bit.
+                    lsb_size &= 0xffff_fffc;

-                // Find the first bit that's set to 1.
-                let first_bit = lsb_size.trailing_zeros();
-                region_size = 2u64.pow(first_bit);
-                // We need to allocate a guest PIO address range for that BAR.
-                // The address needs to be 4 bytes aligned.
-                bar_addr = allocator
-                    .allocate_io_addresses(None, region_size, Some(0x4))
-                    .ok_or_else(|| PciDeviceError::IoAllocationFailed(region_size))?;
+                    // Find the first bit that's set to 1.
+                    let first_bit = lsb_size.trailing_zeros();
+                    region_size = 2u64.pow(first_bit);
+                    // We need to allocate a guest PIO address range for that BAR.
+                    // The address needs to be 4 bytes aligned.
+                    bar_addr = allocator
+                        .allocate_io_addresses(None, region_size, Some(0x4))
+                        .ok_or_else(|| PciDeviceError::IoAllocationFailed(region_size))?;
+                }
+                #[cfg(target_arch = "aarch64")]
+                unimplemented!()
            } else {
                if is_64bit_bar {
                    // 64 bits Memory BAR
@@ -871,7 +871,10 @@ impl PciDevice for VfioPciDevice {
        for region in self.mmio_regions.iter() {
            match region.type_ {
                PciBarRegionType::IORegion => {
+                    #[cfg(target_arch = "x86_64")]
                    allocator.free_io_addresses(region.start, region.length);
+                    #[cfg(target_arch = "aarch64")]
+                    error!("I/O region is not supported");
                }
                PciBarRegionType::Memory32BitRegion => {
                    allocator.free_mmio_hole_addresses(region.start, region.length);
@@ -1013,34 +1016,30 @@ impl PciDevice for VfioPciDevice {
                        let (mmap_offset, mmap_size) = self.device.get_region_mmap(region.index);

                        // Remove old region from KVM
-                        let old_mem_region = kvm_userspace_memory_region {
-                            slot: mem_slot,
-                            guest_phys_addr: old_base + mmap_offset,
-                            memory_size: 0,
-                            userspace_addr: host_addr,
-                            flags: 0,
-                        };
-                        // Safe because the guest regions are guaranteed not to overlap.
-                        unsafe {
-                            self.vm_fd
-                                .set_user_memory_region(old_mem_region)
-                                .map_err(|e| io::Error::from_raw_os_error(e.errno()))?;
-                        }
+                        let old_mem_region = self.vm.make_user_memory_region(
+                            mem_slot,
+                            old_base + mmap_offset,
+                            0,
+                            host_addr as u64,
+                            false,
+                        );
+
+                        self.vm
+                            .set_user_memory_region(old_mem_region)
+                            .map_err(|e| io::Error::new(io::ErrorKind::Other, e))?;

                        // Insert new region to KVM
-                        let new_mem_region = kvm_userspace_memory_region {
-                            slot: mem_slot,
-                            guest_phys_addr: new_base + mmap_offset,
-                            memory_size: mmap_size as u64,
-                            userspace_addr: host_addr,
-                            flags: 0,
-                        };
-                        // Safe because the guest regions are guaranteed not to overlap.
-                        unsafe {
-                            self.vm_fd
-                                .set_user_memory_region(new_mem_region)
-                                .map_err(|e| io::Error::from_raw_os_error(e.errno()))?;
-                        }
+                        let new_mem_region = self.vm.make_user_memory_region(
+                            mem_slot,
+                            new_base + mmap_offset,
+                            mmap_size as u64,
+                            host_addr as u64,
+                            false,
+                        );
+
+                        self.vm
+                            .set_user_memory_region(new_mem_region)
+                            .map_err(|e| io::Error::new(io::ErrorKind::Other, e))?;
                    }
                }
            }
--- a/qcow/Cargo.toml
+++ b/qcow/Cargo.toml
@@ -10,11 +10,10 @@ path = "src/qcow.rs"

 [dependencies]
 byteorder = "1.3.4"
-libc = "0.2.71"
-log = "0.4.8"
-remain = "0.2.1"
+libc = "0.2.74"
+log = "0.4.11"
+remain = "0.2.2"
 vmm-sys-util = ">=0.3.1"
-vm-virtio = { path = "../vm-virtio" }

 [dev-dependencies]
 tempfile = "3.1.0"
--- a/qcow/src/qcow.rs
+++ b/qcow/src/qcow.rs
@@ -6,26 +6,26 @@
 extern crate log;

 mod qcow_raw_file;
+mod raw_file;
 mod refcount;
 mod vec_cache;

+use crate::qcow_raw_file::QcowRawFile;
+use crate::refcount::RefCount;
+use crate::vec_cache::{CacheMap, Cacheable, VecCache};
 use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
 use libc::{EINVAL, ENOSPC, ENOTSUP};
 use remain::sorted;
-use vm_virtio::RawFile;
+use std::cmp::{max, min};
+use std::fmt::{self, Display};
+use std::io::{self, Read, Seek, SeekFrom, Write};
+use std::mem::size_of;
 use vmm_sys_util::{
    file_traits::FileSetLen, file_traits::FileSync, seek_hole::SeekHole, write_zeroes::PunchHole,
    write_zeroes::WriteZeroes,
 };

-use std::cmp::{max, min};
-use std::fmt::{self, Display};
-use std::io::{self, Read, Seek, SeekFrom, Write};
-use std::mem::size_of;
-
-use crate::qcow_raw_file::QcowRawFile;
-use crate::refcount::RefCount;
-use crate::vec_cache::{CacheMap, Cacheable, VecCache};
+pub use crate::raw_file::RawFile;

 #[sorted]
 #[derive(Debug)]
@@ -367,8 +367,7 @@ fn max_refcount_clusters(refcount_order: u32, cluster_size: u32, num_clusters: u
 ///
 /// ```
 /// # use std::io::{Read, Seek, SeekFrom};
-/// # use vm_virtio::RawFile;
-/// # use qcow::{self, QcowFile};
+/// # use qcow::{self, QcowFile, RawFile};
 /// # fn test(file: std::fs::File) -> std::io::Result<()> {
 ///     let mut raw_img = RawFile::new(file, false);
 ///     let mut q = QcowFile::from(raw_img).expect("Can't open qcow file");
@@ -1703,7 +1702,6 @@ mod tests {
    use super::*;
    use std::io::{Read, Seek, SeekFrom, Write};
    use tempfile::tempfile;
-    use vm_virtio::RawFile;

    fn valid_header_v3() -> Vec<u8> {
        vec![
--- a/qcow/src/qcow_raw_file.rs
+++ b/qcow/src/qcow_raw_file.rs
@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.

+use super::RawFile;
+use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
 use std::io::{self, BufWriter, Seek, SeekFrom};
 use std::mem::size_of;
-
-use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
-use vm_virtio::RawFile;
 use vmm_sys_util::write_zeroes::WriteZeroes;

 /// A qcow file. Allows reading/writing clusters and appending clusters.
--- a/qcow/src/raw_file.rs
+++ b/qcow/src/raw_file.rs
@@ -0,0 +1,324 @@
+// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+//
+// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE-BSD-3-Clause file.
+//
+// Copyright © 2020 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
+
+use libc::c_void;
+use std::alloc::{alloc_zeroed, dealloc, Layout};
+use std::convert::TryInto;
+use std::fs::{File, Metadata};
+use std::io::{self, Read, Seek, SeekFrom, Write};
+use std::os::unix::io::{AsRawFd, RawFd};
+use std::slice;
+use vmm_sys_util::{seek_hole::SeekHole, write_zeroes::PunchHole};
+
+#[derive(Debug)]
+pub struct RawFile {
+    file: File,
+    alignment: usize,
+    position: u64,
+}
+
+const BLK_ALIGNMENTS: [usize; 2] = [512, 4096];
+
+fn is_valid_alignment(fd: RawFd, alignment: usize) -> bool {
+    let layout = Layout::from_size_align(alignment, alignment).unwrap();
+    let ptr = unsafe { alloc_zeroed(layout) };
+
+    let ret = unsafe {
+        ::libc::pread(
+            fd,
+            ptr as *mut c_void,
+            alignment,
+            alignment.try_into().unwrap(),
+        )
+    };
+
+    unsafe { dealloc(ptr, layout) };
+
+    ret >= 0
+}
+
+impl RawFile {
+    pub fn new(file: File, direct_io: bool) -> Self {
+        // Assume no alignment restrictions if we aren't using O_DIRECT.
+        let mut alignment = 0;
+        if direct_io {
+            for align in &BLK_ALIGNMENTS {
+                if is_valid_alignment(file.as_raw_fd(), *align) {
+                    alignment = *align;
+                    break;
+                }
+            }
+        }
+        RawFile {
+            file,
+            alignment: alignment.try_into().unwrap(),
+            position: 0,
+        }
+    }
+
+    fn round_up(&self, offset: u64) -> u64 {
+        let align: u64 = self.alignment.try_into().unwrap();
+        ((offset / (align + 1)) + 1) * align
+    }
+
+    fn round_down(&self, offset: u64) -> u64 {
+        let align: u64 = self.alignment.try_into().unwrap();
+        (offset / align) * align
+    }
+
+    fn is_aligned(&self, buf: &[u8]) -> bool {
+        if self.alignment == 0 {
+            return true;
+        }
+
+        let align64: u64 = self.alignment.try_into().unwrap();
+
+        (self.position % align64 == 0)
+            && ((buf.as_ptr() as usize) % self.alignment == 0)
+            && (buf.len() % self.alignment == 0)
+    }
+
+    pub fn set_len(&self, size: u64) -> std::io::Result<()> {
+        self.file.set_len(size)
+    }
+
+    pub fn metadata(&self) -> std::io::Result<Metadata> {
+        self.file.metadata()
+    }
+
+    pub fn try_clone(&self) -> std::io::Result<RawFile> {
+        Ok(RawFile {
+            file: self.file.try_clone().expect("RawFile cloning failed"),
+            alignment: self.alignment,
+            position: self.position,
+        })
+    }
+
+    pub fn sync_all(&self) -> std::io::Result<()> {
+        self.file.sync_all()
+    }
+
+    pub fn sync_data(&self) -> std::io::Result<()> {
+        self.file.sync_data()
+    }
+}
+
+impl Read for RawFile {
+    fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
+        if self.is_aligned(buf) {
+            match self.file.read(buf) {
+                Ok(r) => {
+                    self.position = self.position.checked_add(r.try_into().unwrap()).unwrap();
+                    Ok(r)
+                }
+                Err(e) => Err(e),
+            }
+        } else {
+            let rounded_pos: u64 = self.round_down(self.position);
+            let file_offset: usize = self
+                .position
+                .checked_sub(rounded_pos)
+                .unwrap()
+                .try_into()
+                .unwrap();
+            let buf_len: usize = buf.len();
+            let rounded_len: usize = self
+                .round_up(
+                    file_offset
+                        .checked_add(buf_len)
+                        .unwrap()
+                        .try_into()
+                        .unwrap(),
+                )
+                .try_into()
+                .unwrap();
+
+            let layout = Layout::from_size_align(rounded_len, self.alignment).unwrap();
+            let tmp_ptr = unsafe { alloc_zeroed(layout) };
+            let tmp_buf = unsafe { slice::from_raw_parts_mut(tmp_ptr, rounded_len) };
+
+            // This can eventually replaced with read_at once its interface
+            // has been stabilized.
+            let ret = unsafe {
+                ::libc::pread64(
+                    self.file.as_raw_fd(),
+                    tmp_buf.as_mut_ptr() as *mut c_void,
+                    tmp_buf.len(),
+                    rounded_pos.try_into().unwrap(),
+                )
+            };
+            if ret < 0 {
+                unsafe { dealloc(tmp_ptr, layout) };
+                return Err(io::Error::last_os_error());
+            }
+
+            let read: usize = ret.try_into().unwrap();
+            if read < file_offset {
+                unsafe { dealloc(tmp_ptr, layout) };
+                return Ok(0);
+            }
+
+            let mut to_copy = read - file_offset;
+            if to_copy > buf_len {
+                to_copy = buf_len;
+            }
+
+            buf.copy_from_slice(&tmp_buf[file_offset..(file_offset + buf_len)]);
+            unsafe { dealloc(tmp_ptr, layout) };
+
+            self.seek(SeekFrom::Current(to_copy.try_into().unwrap()))
+                .unwrap();
+            Ok(to_copy.try_into().unwrap())
+        }
+    }
+}
+
+impl Write for RawFile {
+    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
+        if self.is_aligned(buf) {
+            match self.file.write(buf) {
+                Ok(r) => {
+                    self.position = self.position.checked_add(r.try_into().unwrap()).unwrap();
+                    Ok(r)
+                }
+                Err(e) => Err(e),
+            }
+        } else {
+            let rounded_pos: u64 = self.round_down(self.position);
+            let file_offset: usize = self
+                .position
+                .checked_sub(rounded_pos)
+                .unwrap()
+                .try_into()
+                .unwrap();
+            let buf_len: usize = buf.len();
+            let rounded_len: usize = self
+                .round_up(
+                    file_offset
+                        .checked_add(buf_len)
+                        .unwrap()
+                        .try_into()
+                        .unwrap(),
+                )
+                .try_into()
+                .unwrap();
+
+            let layout = Layout::from_size_align(rounded_len, self.alignment).unwrap();
+            let tmp_ptr = unsafe { alloc_zeroed(layout) };
+            let tmp_buf = unsafe { slice::from_raw_parts_mut(tmp_ptr, rounded_len) };
+
+            // This can eventually replaced with read_at once its interface
+            // has been stabilized.
+            let ret = unsafe {
+                ::libc::pread64(
+                    self.file.as_raw_fd(),
+                    tmp_buf.as_mut_ptr() as *mut c_void,
+                    tmp_buf.len(),
+                    rounded_pos.try_into().unwrap(),
+                )
+            };
+            if ret < 0 {
+                unsafe { dealloc(tmp_ptr, layout) };
+                return Err(io::Error::last_os_error());
+            };
+
+            tmp_buf[file_offset..(file_offset + buf_len)].copy_from_slice(buf);
+
+            // This can eventually replaced with write_at once its interface
+            // has been stabilized.
+            let ret = unsafe {
+                ::libc::pwrite64(
+                    self.file.as_raw_fd(),
+                    tmp_buf.as_ptr() as *const c_void,
+                    tmp_buf.len(),
+                    rounded_pos.try_into().unwrap(),
+                )
+            };
+
+            unsafe { dealloc(tmp_ptr, layout) };
+
+            if ret < 0 {
+                return Err(io::Error::last_os_error());
+            }
+
+            let written: usize = ret.try_into().unwrap();
+            if written < file_offset {
+                Ok(0)
+            } else {
+                let mut to_seek = written - file_offset;
+                if to_seek > buf_len {
+                    to_seek = buf_len;
+                }
+
+                self.seek(SeekFrom::Current(to_seek.try_into().unwrap()))
+                    .unwrap();
+                Ok(to_seek.try_into().unwrap())
+            }
+        }
+    }
+
+    fn flush(&mut self) -> std::io::Result<()> {
+        self.file.sync_all()
+    }
+}
+
+impl Seek for RawFile {
+    fn seek(&mut self, newpos: SeekFrom) -> std::io::Result<u64> {
+        match self.file.seek(newpos) {
+            Ok(pos) => {
+                self.position = pos;
+                Ok(pos)
+            }
+            Err(e) => Err(e),
+        }
+    }
+}
+
+impl PunchHole for RawFile {
+    fn punch_hole(&mut self, offset: u64, length: u64) -> std::io::Result<()> {
+        self.file.punch_hole(offset, length)
+    }
+}
+
+impl SeekHole for RawFile {
+    fn seek_hole(&mut self, offset: u64) -> std::io::Result<Option<u64>> {
+        match self.file.seek_hole(offset) {
+            Ok(pos) => {
+                if let Some(p) = pos {
+                    self.position = p;
+                }
+                Ok(pos)
+            }
+            Err(e) => Err(e),
+        }
+    }
+
+    fn seek_data(&mut self, offset: u64) -> std::io::Result<Option<u64>> {
+        match self.file.seek_data(offset) {
+            Ok(pos) => {
+                if let Some(p) = pos {
+                    self.position = p;
+                }
+                Ok(pos)
+            }
+            Err(e) => Err(e),
+        }
+    }
+}
+
+impl Clone for RawFile {
+    fn clone(&self) -> Self {
+        RawFile {
+            file: self.file.try_clone().expect("RawFile cloning failed"),
+            alignment: self.alignment,
+            position: self.position,
+        }
+    }
+}
--- a/release-notes.md
+++ b/release-notes.md
@@ -1,4 +1,4 @@
- [v0.8.0](#v080)
+ - [v0.8.0](#v080)
    - [Experimental Snapshot and Restore Support](#experimental-snapshot-and-restore-support)
    - [Experimental ARM64 Support](#experimental-arm64-support)
    - [Support for Using 5-level Paging in Guests](#support-for-using-5-level-paging-in-guests)
@@ -7,6 +7,29 @@
    - [Notable Bug Fixes](#notable-bug-fixes)
    - [Command Line and API Changes](#command-line-and-api-changes)
    - [Contributors](#contributors)
+- [v0.9.0](#v090)
+    - [`io_uring` Based Block Device Support](#io_uring-based-block-device-support)
+    - [Block and Network Device Statistics](#block-and-network-device-statistics)
+    - [HTTP API Responses](#http-api-responses)
+    - [CPU Topology](#cpu-topology)
+    - [Release Build Optimization](#release-build-optimization)
+    - [Hypervisor Abstraction](#hypervisor-abstraction)
+    - [Snapshot/Restore Improvements](#snapshotrestore-improvements)
+    - [Virtio Memory Ballooning Support](#virtio-memory-ballooning-support)
+    - [Enhancements to ARM64 Support](#enhancements-to-arm64-support)
+    - [Intel SGX Support](#intel-sgx-support)
+    - [`Seccomp` Sandbox Improvements](#seccomp-sandbox-improvements)
+    - [Notable Bug Fixes](#notable-bug-fixes)
+    - [Contributors](#contributors)
+- [v0.8.0](#v080)
+    - [Experimental Snapshot and Restore Support](#experimental-snapshot-and-restore-support)
+    - [Experimental ARM64 Support](#experimental-arm64-support)
+    - [Support for Using 5-level Paging in Guests](#support-for-using-5-level-paging-in-guests)
+    - [Virtio Device Interrupt Suppression for Network Devices](#virtio-device-interrupt-suppression-for-network-devices)
+    - [`vhost_user_fs` Improvements](#vhost_user_fs-improvements)
+    - [Notable Bug Fixes](#notable-bug-fixes-1)
+    - [Command Line and API Changes](#command-line-and-api-changes)
+    - [Contributors](#contributors-1)
 - [v0.7.0](#v070)
    - [Block, Network, Persistent Memory (PMEM), VirtioFS and Vsock hotplug](#block-network-persistent-memory-pmem-virtiofs-and-vsock-hotplug)
    - [Alternative `libc` Support](#alternative-libc-support)
@@ -16,14 +39,14 @@
    - [`Seccomp` Sandboxing](#seccomp-sandboxing)
    - [Updated Distribution Support](#updated-distribution-support)
    - [Command Line and API Changes](#command-line-and-api-changes-1)
-    - [Contributors](#contributors-1)
+    - [Contributors](#contributors-2)
 - [v0.6.0](#v060)
    - [Directly Assigned Devices Hotplug](#directly-assigned-devices-hotplug)
    - [Shared Filesystem Improvements](#shared-filesystem-improvements)
    - [Block and Networking IO Self Offloading](#block-and-networking-io-self-offloading)
    - [Command Line Interface](#command-line-interface)
    - [PVH Boot](#pvh-boot)
-    - [Contributors](#contributors-2)
+    - [Contributors](#contributors-3)
 - [v0.5.1](#v051)
 - [v0.5.0](#v050)
    - [Virtual Machine Dynamic Resizing](#virtual-machine-dynamic-resizing)
@@ -31,7 +54,7 @@
    - [New Interrupt Management Framework](#new-interrupt-management-framework)
    - [Development Tools](#development-tools)
    - [Kata Containers Integration](#kata-containers-integration)
-    - [Contributors](#contributors-3)
+    - [Contributors](#contributors-4)
 - [v0.4.0](#v040)
    - [Dynamic virtual CPUs addition](#dynamic-virtual-cpus-addition)
    - [Programmatic firmware tables generation](#programmatic-firmware-tables-generation)
@@ -40,7 +63,7 @@
    - [Userspace IOAPIC by default](#userspace-ioapic-by-default)
    - [PCI BAR reprogramming](#pci-bar-reprogramming)
    - [New `cloud-hypervisor` organization](#new-cloud-hypervisor-organization)
-    - [Contributors](#contributors-4)
+    - [Contributors](#contributors-5)
 - [v0.3.0](#v030)
    - [Block device offloading](#block-device-offloading)
    - [Network device backend](#network-device-backend)
@@ -67,6 +90,89 @@
    - [Unit testing](#unit-testing)
    - [Integration tests parallelization](#integration-tests-parallelization)

+# v0.9.0
+
+This release has been tracked through the [0.9.0 project](https://github.com/cloud-hypervisor/cloud-hypervisor/projects/12).
+
+Highlights for `cloud-hypervisor` version 0.9.0 include:
+
+### `io_uring` Based Block Device Support
+
+If the `io_uring` feature is enabled and the host kernel supports it then `io_uring` will be used for block devices. This results a very significant performance improvement.
+
+### Block and Network Device Statistics
+
+Statistics for activity of the `virtio` network and block devices is now exposed through a new `vm.counters` HTTP API entry point. These take the form of simple counters which can be used to observe the activity of the VM.
+
+### HTTP API Responses
+
+The HTTP API for adding devices now responds with the name that was assigned to the device as well the PCI BDF.
+
+### CPU Topology
+
+A `topology` parameter has been added to `--cpus` which allows the configuration of the guest CPU topology allowing the user to specify the numbers of sockets, packages per socket, cores per package and threads per core.
+
+### Release Build Optimization
+
+Our release build is now built with LTO (*Link Time Optimization*) which results in a ~20% reduction in the binary size.
+
+### Hypervisor Abstraction
+
+A new abstraction has been introduced, in the form of a `hypervisor` crate so as to enable the support of additional hypervisors beyond `KVM`.
+
+### Snapshot/Restore Improvements
+
+Multiple improvements have been made to the VM snapshot/restore support that was added in the last release. This includes persisting more vCPU state and in particular preserving the guest paravirtualized clock in order to avoid vCPU hangs inside the guest when running with multiple vCPUs.
+
+### Virtio Memory Ballooning Support
+ 
+A `virtio-balloon` device has been added, controlled through the `resize` control, which allows the reclamation of host memory by resizing a memory balloon inside the guest.
+
+### Enhancements to ARM64 Support
+
+The ARM64 support introduced in the last release has been further enhanced with support for using PCI for exposing devices into the guest as well as multiple bug fixes. It also now supports using an initramfs when booting.
+
+### Intel SGX Support
+
+The guest can now use Intel SGX if the host supports it. Details can be found in the dedicated [SGX documentation](docs/intel_sgx.md).
+
+### `Seccomp` Sandbox Improvements
+
+The most frequently used virtio devices are now isolated with their own `seccomp` filters. It is also now possible to pass `--seccomp=log` which result in the logging of requests that would have otherwise been denied to further aid development.
+
+### Notable Bug Fixes
+
+* Our `virtio-vsock` implementation has been resynced with the implementation from Firecracker and includes multiple bug fixes.
+* CPU hotplug has been fixed so that it is now possible to add, remove, and re-add vCPUs (#1338)
+* A workaround is now in place for when KVM reports MSRs available MSRs that are in fact unreadable preventing snapshot/restore from working correctly (#1543).
+* `virtio-mmio` based devices are now more widely tested (#275).
+* Multiple issues have been fixed with virtio device configuration (#1217)
+* Console input was wrongly consumed by both `virtio-console` and the serial. (#1521)
+
+### Contributors
+
+Many thanks to everyone who has contributed to our 0.9.0 release including some new faces.
+
+* Anatol Belski <ab@php.net>
+* Bo Chen <chen.bo@intel.com>
+* Dr. David Alan Gilbert <dgilbert@redhat.com>
+* Henry Wang <Henry.Wang@arm.com>
+* Howard Zhang <howard.zhang@arm.com>
+* Hui Zhu <teawater@antfin.com>
+* Jianyong Wu <jianyong.wu@arm.com>
+* Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>
+* LiYa'nan <oliverliyn@gmail.com>
+* Michael Zhao <michael.zhao@arm.com>
+* Muminul Islam <muislam@microsoft.com>
+* Praveen Paladugu <prapal@microsoft.com>
+* Ricardo Koller <ricarkol@gmail.com>
+* Rob Bradford <robert.bradford@intel.com>
+* Samuel Ortiz <sameo@linux.intel.com>
+* Sebastien Boeuf <sebastien.boeuf@intel.com>
+* Stefano Garzarella <sgarzare@redhat.com>
+* Wei Liu <liuwe@microsoft.com>
+
+
 # v0.8.0

 This release has been tracked through the [0.8.0 project](https://github.com/cloud-hypervisor/cloud-hypervisor/projects/10).
--- a/resources/Dockerfile
+++ b/resources/Dockerfile
@@ -49,6 +49,22 @@ RUN if [ "$TARGETARCH" = "x86_64" ]; then \
 	&& apt-get clean \
    && rm -rf /var/lib/apt/lists/*;	fi

+RUN if [ "$TARGETARCH" = "aarch64" ]; then \
+        # On AArch64, `setcap` binary should be installed via `libcap2-bin`.
+        # The `setcap` binary is used in integration tests.
+        apt-get update \
+        && apt-get -yq upgrade \
+        && DEBIAN_FRONTEND=noninteractive apt-get install -yq libcap2-bin \
+        && apt-get clean \
+        && rm -rf /var/lib/apt/lists/* \
+        # Build and install the musl-gcc version of libfdt. This is to ensure
+        # the cloud-hypervisor binary can be built and linked using musl toolchain.
+        && git clone https://github.com/dgibson/dtc.git && cd dtc \
+        && sed -i 's/$(LIBFDT_archive) $(LIBFDT_lib)/$(LIBFDT_archive)/g' Makefile \
+        && export CC=musl-gcc && make libfdt \
+        && cp libfdt/libfdt.a /usr/lib/aarch64-linux-musl \
+        && rm -rf /dtc;	fi
+
 # Fix the libssl-dev install
 RUN cp /usr/include/"$TARGETARCH"-linux-gnu/openssl/opensslconf.h /usr/include/openssl/
 ENV OPENSSL_DIR=/usr/lib/"$TARGETARCH"-linux-gnu/
--- a/resources/linux-config-aarch64
+++ b/resources/linux-config-aarch64
--- a/resources/linux-config-x86_64
+++ b/resources/linux-config-x86_64
@@ -1,18 +1,16 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 5.6.0-rc4 Kernel Configuration
-#
-
-#
-# Compiler: gcc (Ubuntu 8.3.0-6ubuntu1) 8.3.0
+# Linux/x86 5.8.0-rc4 Kernel Configuration
 #
+CONFIG_CC_VERSION_TEXT="gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0"
 CONFIG_CC_IS_GCC=y
-CONFIG_GCC_VERSION=80300
+CONFIG_GCC_VERSION=90300
+CONFIG_LD_VERSION=234000000
 CONFIG_CLANG_VERSION=0
 CONFIG_CC_CAN_LINK=y
+CONFIG_CC_CAN_LINK_STATIC=y
 CONFIG_CC_HAS_ASM_GOTO=y
 CONFIG_CC_HAS_ASM_INLINE=y
-CONFIG_CC_HAS_WARN_MAYBE_UNINITIALIZED=y
 CONFIG_IRQ_WORK=y
 CONFIG_BUILDTIME_TABLE_SORT=y
 CONFIG_THREAD_INFO_IN_TASK=y
@@ -37,12 +35,14 @@ CONFIG_KERNEL_GZIP=y
 # CONFIG_KERNEL_XZ is not set
 # CONFIG_KERNEL_LZO is not set
 # CONFIG_KERNEL_LZ4 is not set
+CONFIG_DEFAULT_INIT=""
 CONFIG_DEFAULT_HOSTNAME="cloud-hypervisor"
 CONFIG_SWAP=y
 CONFIG_SYSVIPC=y
 CONFIG_SYSVIPC_SYSCTL=y
 CONFIG_POSIX_MQUEUE=y
 CONFIG_POSIX_MQUEUE_SYSCTL=y
+# CONFIG_WATCH_QUEUE is not set
 CONFIG_CROSS_MEMORY_ATTACH=y
 # CONFIG_USELIB is not set
 CONFIG_AUDIT=y
@@ -57,6 +57,7 @@ CONFIG_GENERIC_IRQ_SHOW=y
 CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK=y
 CONFIG_GENERIC_PENDING_IRQ=y
 CONFIG_GENERIC_IRQ_MIGRATION=y
+CONFIG_HARDIRQS_SW_RESEND=y
 CONFIG_IRQ_DOMAIN=y
 CONFIG_IRQ_DOMAIN_HIERARCHY=y
 CONFIG_GENERIC_MSI_IRQ=y
@@ -70,7 +71,6 @@ CONFIG_SPARSE_IRQ=y
 # end of IRQ subsystem

 CONFIG_CLOCKSOURCE_WATCHDOG=y
-CONFIG_ARCH_CLOCKSOURCE_DATA=y
 CONFIG_ARCH_CLOCKSOURCE_INIT=y
 CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE=y
 CONFIG_GENERIC_TIME_VSYSCALL=y
@@ -102,6 +102,7 @@ CONFIG_TICK_CPU_ACCOUNTING=y
 # CONFIG_VIRT_CPU_ACCOUNTING_GEN is not set
 # CONFIG_IRQ_TIME_ACCOUNTING is not set
 CONFIG_HAVE_SCHED_AVG_IRQ=y
+# CONFIG_SCHED_THERMAL_PRESSURE is not set
 CONFIG_BSD_PROCESS_ACCT=y
 CONFIG_BSD_PROCESS_ACCT_V3=y
 CONFIG_TASKSTATS=y
@@ -135,6 +136,7 @@ CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
 #
 # Scheduler features
 #
+# CONFIG_UCLAMP_TASK is not set
 # end of Scheduler features

 CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
@@ -147,7 +149,6 @@ CONFIG_CGROUPS=y
 CONFIG_PAGE_COUNTER=y
 CONFIG_MEMCG=y
 CONFIG_MEMCG_SWAP=y
-CONFIG_MEMCG_SWAP_ENABLED=y
 CONFIG_MEMCG_KMEM=y
 CONFIG_BLK_CGROUP=y
 CONFIG_CGROUP_WRITEBACK=y
@@ -215,6 +216,7 @@ CONFIG_SHMEM=y
 CONFIG_AIO=y
 CONFIG_IO_URING=y
 CONFIG_ADVISE_SYSCALLS=y
+CONFIG_HAVE_ARCH_USERFAULTFD_WP=y
 CONFIG_MEMBARRIER=y
 CONFIG_KALLSYMS=y
 # CONFIG_KALLSYMS_ALL is not set
@@ -257,7 +259,6 @@ CONFIG_X86_64=y
 CONFIG_X86=y
 CONFIG_INSTRUCTION_DECODER=y
 CONFIG_OUTPUT_FORMAT="elf64-x86-64"
-CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
 CONFIG_LOCKDEP_SUPPORT=y
 CONFIG_STACKTRACE_SUPPORT=y
 CONFIG_MMU=y
@@ -313,7 +314,6 @@ CONFIG_PARAVIRT_SPINLOCKS=y
 CONFIG_KVM_GUEST=y
 CONFIG_ARCH_CPUIDLE_HALTPOLL=y
 CONFIG_PVH=y
-CONFIG_KVM_DEBUG_FS=y
 CONFIG_PARAVIRT_TIME_ACCOUNTING=y
 CONFIG_PARAVIRT_CLOCK=y
 # CONFIG_JAILHOUSE_GUEST is not set
@@ -379,7 +379,6 @@ CONFIG_AMD_MEM_ENCRYPT=y
 CONFIG_NUMA=y
 # CONFIG_AMD_NUMA is not set
 CONFIG_X86_64_ACPI_NUMA=y
-CONFIG_NODES_SPAN_OTHER_NODES=y
 # CONFIG_NUMA_EMU is not set
 CONFIG_NODES_SHIFT=10
 CONFIG_ARCH_SPARSEMEM_ENABLE=y
@@ -454,6 +453,7 @@ CONFIG_ARCH_HIBERNATION_HEADER=y
 # CONFIG_SUSPEND is not set
 CONFIG_HIBERNATE_CALLBACKS=y
 CONFIG_HIBERNATION=y
+# CONFIG_HIBERNATION_SNAPSHOT_DEV is not set
 CONFIG_PM_STD_PARTITION=""
 CONFIG_PM_SLEEP=y
 CONFIG_PM_SLEEP_SMP=y
@@ -479,6 +479,7 @@ CONFIG_ACPI_REV_OVERRIDE_POSSIBLE=y
 # CONFIG_ACPI_AC is not set
 # CONFIG_ACPI_BATTERY is not set
 # CONFIG_ACPI_BUTTON is not set
+# CONFIG_ACPI_TINY_POWER_BUTTON is not set
 # CONFIG_ACPI_VIDEO is not set
 # CONFIG_ACPI_FAN is not set
 # CONFIG_ACPI_TAD is not set
@@ -519,6 +520,7 @@ CONFIG_X86_PM_TIMER=y
 # CPU Frequency scaling
 #
 CONFIG_CPU_FREQ=y
+CONFIG_CPU_FREQ_GOV_ATTR_SET=y
 # CONFIG_CPU_FREQ_STAT is not set
 CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
 # CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
@@ -531,7 +533,7 @@ CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
 # CONFIG_CPU_FREQ_GOV_USERSPACE is not set
 # CONFIG_CPU_FREQ_GOV_ONDEMAND is not set
 # CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
-# CONFIG_CPU_FREQ_GOV_SCHEDUTIL is not set
+CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y

 #
 # CPU frequency scaling drivers
@@ -600,6 +602,7 @@ CONFIG_EFI_ESRT=y
 CONFIG_EFI_RUNTIME_MAP=y
 # CONFIG_EFI_FAKE_MEMMAP is not set
 CONFIG_EFI_RUNTIME_WRAPPERS=y
+CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER=y
 # CONFIG_EFI_CAPSULE_LOADER is not set
 # CONFIG_EFI_TEST is not set
 # CONFIG_APPLE_PROPERTIES is not set
@@ -634,9 +637,10 @@ CONFIG_KVM=y
 # CONFIG_KVM_WERROR is not set
 CONFIG_KVM_INTEL=y
 # CONFIG_KVM_AMD is not set
-# CONFIG_VHOST_NET is not set
-# CONFIG_VHOST_VSOCK is not set
-# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set
+CONFIG_AS_AVX512=y
+CONFIG_AS_SHA1_NI=y
+CONFIG_AS_SHA256_NI=y
+CONFIG_AS_TPAUSE=y

 #
 # General architecture-dependent options
@@ -670,7 +674,6 @@ CONFIG_HAVE_ASM_MODVERSIONS=y
 CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
 CONFIG_HAVE_RSEQ=y
 CONFIG_HAVE_FUNCTION_ARG_ACCESS_API=y
-CONFIG_HAVE_CLK=y
 CONFIG_HAVE_HW_BREAKPOINT=y
 CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y
 CONFIG_HAVE_USER_RETURN_NOTIFIER=y
@@ -705,7 +708,6 @@ CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
 CONFIG_HAVE_ARCH_SOFT_DIRTY=y
 CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
 CONFIG_MODULES_USE_ELF_RELA=y
-CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
 CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
 CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
 CONFIG_HAVE_EXIT_THREAD=y
@@ -731,7 +733,6 @@ CONFIG_ARCH_HAS_MEM_ENCRYPT=y
 CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
 # end of GCOV-based kernel profiling

-CONFIG_PLUGIN_HOSTCC=""
 CONFIG_HAVE_GCC_PLUGINS=y
 # end of General architecture-dependent options

@@ -755,6 +756,7 @@ CONFIG_BLK_WBT=y
 CONFIG_BLK_WBT_MQ=y
 CONFIG_BLK_DEBUG_FS=y
 # CONFIG_BLK_SED_OPAL is not set
+# CONFIG_BLK_INLINE_ENCRYPTION is not set

 #
 # Partition Types
@@ -803,6 +805,7 @@ CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_RWLOCKS=y
+CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y
 CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE=y
 CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y
 CONFIG_FREEZER=y
@@ -829,8 +832,8 @@ CONFIG_HAVE_MEMORY_PRESENT=y
 CONFIG_SPARSEMEM_EXTREME=y
 CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
 CONFIG_SPARSEMEM_VMEMMAP=y
-CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
 CONFIG_HAVE_FAST_GUP=y
+CONFIG_NUMA_KEEP_MEMINFO=y
 CONFIG_MEMORY_ISOLATION=y
 CONFIG_HAVE_BOOTMEM_INFO_NODE=y
 CONFIG_MEMORY_HOTPLUG=y
@@ -841,6 +844,7 @@ CONFIG_SPLIT_PTLOCK_CPUS=4
 CONFIG_MEMORY_BALLOON=y
 CONFIG_BALLOON_COMPACTION=y
 CONFIG_COMPACTION=y
+CONFIG_PAGE_REPORTING=y
 CONFIG_MIGRATION=y
 CONFIG_CONTIG_ALLOC=y
 CONFIG_PHYS_ADDR_T_64BIT=y
@@ -854,16 +858,27 @@ CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
 CONFIG_ARCH_WANTS_THP_SWAP=y
 CONFIG_THP_SWAP=y
-CONFIG_TRANSPARENT_HUGE_PAGECACHE=y
 CONFIG_CLEANCACHE=y
 CONFIG_FRONTSWAP=y
 # CONFIG_CMA is not set
 CONFIG_ZSWAP=y
+# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_DEFLATE is not set
+CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZO=y
+# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_842 is not set
+# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZ4 is not set
+# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZ4HC is not set
+# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_ZSTD is not set
+CONFIG_ZSWAP_COMPRESSOR_DEFAULT="lzo"
+CONFIG_ZSWAP_ZPOOL_DEFAULT_ZBUD=y
+# CONFIG_ZSWAP_ZPOOL_DEFAULT_Z3FOLD is not set
+# CONFIG_ZSWAP_ZPOOL_DEFAULT_ZSMALLOC is not set
+CONFIG_ZSWAP_ZPOOL_DEFAULT="zbud"
+# CONFIG_ZSWAP_DEFAULT_ON is not set
 CONFIG_ZPOOL=y
 CONFIG_ZBUD=y
 # CONFIG_Z3FOLD is not set
 CONFIG_ZSMALLOC=y
-# CONFIG_PGTABLE_MAPPING is not set
+# CONFIG_ZSMALLOC_PGTABLE_MAPPING is not set
 CONFIG_ZSMALLOC_STAT=y
 CONFIG_GENERIC_EARLY_IOREMAP=y
 # CONFIG_DEFERRED_STRUCT_PAGE_INIT is not set
@@ -965,6 +980,7 @@ CONFIG_VIRTIO_VSOCKETS_COMMON=y
 # CONFIG_HSR is not set
 # CONFIG_NET_SWITCHDEV is not set
 # CONFIG_NET_L3_MASTER_DEV is not set
+# CONFIG_QRTR is not set
 # CONFIG_NET_NCSI is not set
 CONFIG_RPS=y
 CONFIG_RFS_ACCEL=y
@@ -1056,6 +1072,11 @@ CONFIG_HOTPLUG_PCI_ACPI=y
 # CONFIG_PCI_MESON is not set
 # end of DesignWare PCI Core Support

+#
+# Mobiveil PCIe Core Support
+#
+# end of Mobiveil PCIe Core Support
+
 #
 # Cadence PCIe controllers support
 #
@@ -1110,6 +1131,7 @@ CONFIG_GENERIC_CPU_VULNERABILITIES=y
 #
 # Bus devices
 #
+# CONFIG_MHI_BUS is not set
 # end of Bus devices

 CONFIG_CONNECTOR=y
@@ -1207,6 +1229,7 @@ CONFIG_VIRTIO_BLK=y
 # CONFIG_MISC_ALCOR_PCI is not set
 # CONFIG_MISC_RTSX_PCI is not set
 # CONFIG_HABANA_AI is not set
+# CONFIG_UACCE is not set
 # end of Misc devices

 CONFIG_HAVE_IDE=y
@@ -1244,6 +1267,7 @@ CONFIG_NET_CORE=y
 # CONFIG_IPVLAN is not set
 # CONFIG_VXLAN is not set
 # CONFIG_GENEVE is not set
+# CONFIG_BAREUDP is not set
 # CONFIG_GTP is not set
 # CONFIG_MACSEC is not set
 # CONFIG_NETCONSOLE is not set
@@ -1323,7 +1347,6 @@ CONFIG_INPUT_KEYBOARD=y
 CONFIG_INPUT_MISC=y
 # CONFIG_INPUT_AD714X is not set
 # CONFIG_INPUT_E3X0_BUTTON is not set
-# CONFIG_INPUT_MSM_VIBRATOR is not set
 # CONFIG_INPUT_PCSPKR is not set
 # CONFIG_INPUT_ATLAS_BTNS is not set
 CONFIG_INPUT_UINPUT=y
@@ -1352,14 +1375,7 @@ CONFIG_HW_CONSOLE=y
 CONFIG_VT_HW_CONSOLE_BINDING=y
 CONFIG_UNIX98_PTYS=y
 # CONFIG_LEGACY_PTYS is not set
-# CONFIG_SERIAL_NONSTANDARD is not set
-# CONFIG_NOZOMI is not set
-# CONFIG_N_GSM is not set
-# CONFIG_TRACE_SINK is not set
-# CONFIG_NULL_TTY is not set
 # CONFIG_LDISC_AUTOLOAD is not set
-CONFIG_DEVMEM=y
-# CONFIG_DEVKMEM is not set

 #
 # Serial drivers
@@ -1390,6 +1406,7 @@ CONFIG_SERIAL_8250_MID=y
 CONFIG_SERIAL_CORE=y
 CONFIG_SERIAL_CORE_CONSOLE=y
 # CONFIG_SERIAL_JSM is not set
+# CONFIG_SERIAL_LANTIQ is not set
 # CONFIG_SERIAL_SCCNXP is not set
 # CONFIG_SERIAL_ALTERA_JTAGUART is not set
 # CONFIG_SERIAL_ALTERA_UART is not set
@@ -1399,12 +1416,18 @@ CONFIG_SERIAL_ARC_NR_PORTS=1
 # CONFIG_SERIAL_RP2 is not set
 # CONFIG_SERIAL_FSL_LPUART is not set
 # CONFIG_SERIAL_FSL_LINFLEXUART is not set
+# CONFIG_SERIAL_SPRD is not set
 # end of Serial drivers

+# CONFIG_SERIAL_NONSTANDARD is not set
+# CONFIG_N_GSM is not set
+# CONFIG_NOZOMI is not set
+# CONFIG_NULL_TTY is not set
+# CONFIG_TRACE_SINK is not set
+CONFIG_HVC_DRIVER=y
 CONFIG_SERIAL_DEV_BUS=y
 CONFIG_SERIAL_DEV_CTRL_TTYPORT=y
 # CONFIG_TTY_PRINTK is not set
-CONFIG_HVC_DRIVER=y
 CONFIG_VIRTIO_CONSOLE=y
 # CONFIG_IPMI_HANDLER is not set
 CONFIG_HW_RANDOM=y
@@ -1413,16 +1436,18 @@ CONFIG_HW_RANDOM_INTEL=y
 CONFIG_HW_RANDOM_AMD=y
 CONFIG_HW_RANDOM_VIA=y
 CONFIG_HW_RANDOM_VIRTIO=y
-CONFIG_NVRAM=y
 # CONFIG_APPLICOM is not set
 # CONFIG_MWAVE is not set
+CONFIG_DEVMEM=y
+# CONFIG_DEVKMEM is not set
+CONFIG_NVRAM=y
 CONFIG_RAW_DRIVER=y
 CONFIG_MAX_RAW_DEVS=256
+CONFIG_DEVPORT=y
 # CONFIG_HPET is not set
 CONFIG_HANGCHECK_TIMER=y
 # CONFIG_TCG_TPM is not set
 CONFIG_TELCLOCK=y
-CONFIG_DEVPORT=y
 # CONFIG_XILLYBUS is not set
 # end of Character devices

@@ -1462,6 +1487,7 @@ CONFIG_PTP_1588_CLOCK=y
 # Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
 #
 CONFIG_PTP_1588_CLOCK_KVM=y
+# CONFIG_PTP_1588_CLOCK_VMW is not set
 # end of PTP clock support

 # CONFIG_PINCTRL is not set
@@ -1530,6 +1556,7 @@ CONFIG_BCMA_POSSIBLE=y

 # CONFIG_REGULATOR is not set
 # CONFIG_RC_CORE is not set
+# CONFIG_MEDIA_CEC_SUPPORT is not set
 # CONFIG_MEDIA_SUPPORT is not set

 #
@@ -1546,11 +1573,6 @@ CONFIG_VGA_ARB_MAX_GPUS=16
 #
 # end of ARM devices

-#
-# ACP (Audio CoProcessor) Configuration
-#
-# end of ACP (Audio CoProcessor) Configuration
-
 #
 # Frame buffer Devices
 #
@@ -1667,6 +1689,7 @@ CONFIG_HID_GENERIC=y
 # CONFIG_HID_EZKEY is not set
 # CONFIG_HID_GEMBIRD is not set
 # CONFIG_HID_GFRM is not set
+# CONFIG_HID_GLORIOUS is not set
 # CONFIG_HID_KEYTOUCH is not set
 # CONFIG_HID_KYE is not set
 # CONFIG_HID_WALTOP is not set
@@ -1767,6 +1790,7 @@ CONFIG_HSU_DMA=y
 # DMABUF options
 #
 # CONFIG_SYNC_FILE is not set
+# CONFIG_DMABUF_MOVE_NOTIFY is not set
 # CONFIG_DMABUF_HEAPS is not set
 # end of DMABUF options

@@ -1803,6 +1827,8 @@ CONFIG_VIRTIO_MEM=y
 CONFIG_VIRTIO_INPUT=y
 CONFIG_VIRTIO_MMIO=y
 CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
+# CONFIG_VDPA is not set
+# CONFIG_VHOST_MENU is not set

 #
 # Microsoft Hyper-V guest support
@@ -1817,15 +1843,10 @@ CONFIG_PMC_ATOM=y
 # CONFIG_MFD_CROS_EC is not set
 # CONFIG_CHROME_PLATFORMS is not set
 # CONFIG_MELLANOX_PLATFORM is not set
+CONFIG_HAVE_CLK=y
 CONFIG_CLKDEV_LOOKUP=y
 CONFIG_HAVE_CLK_PREPARE=y
 CONFIG_COMMON_CLK=y
-
-#
-# Common Clock Framework
-#
-# end of Common Clock Framework
-
 # CONFIG_HWSPINLOCK is not set

 #
@@ -1855,7 +1876,9 @@ CONFIG_IOMMU_DMA=y
 # CONFIG_INTEL_IOMMU is not set
 # CONFIG_IRQ_REMAP is not set
 CONFIG_VIRTIO_IOMMU=y
+CONFIG_VIRTIO_IOMMU_TOPOLOGY_HELPERS=y
 CONFIG_VIRTIO_IOMMU_TOPOLOGY=y
+CONFIG_ACPI_VIOT=y

 #
 # Remoteproc drivers
@@ -1986,6 +2009,7 @@ CONFIG_DAX=y
 # CONFIG_SLIMBUS is not set
 # CONFIG_INTERCONNECT is not set
 # CONFIG_COUNTER is not set
+# CONFIG_MOST is not set
 # end of Device Drivers

 #
@@ -2060,7 +2084,7 @@ CONFIG_CACHEFILES=y
 # end of CD-ROM/DVD Filesystems

 #
-# DOS/FAT/NT Filesystems
+# DOS/FAT/EXFAT/NT Filesystems
 #
 CONFIG_FAT_FS=y
 CONFIG_MSDOS_FS=y
@@ -2068,8 +2092,9 @@ CONFIG_VFAT_FS=y
 CONFIG_FAT_DEFAULT_CODEPAGE=437
 CONFIG_FAT_DEFAULT_IOCHARSET="ascii"
 # CONFIG_FAT_DEFAULT_UTF8 is not set
+# CONFIG_EXFAT_FS is not set
 # CONFIG_NTFS_FS is not set
-# end of DOS/FAT/NT Filesystems
+# end of DOS/FAT/EXFAT/NT Filesystems

 #
 # Pseudo filesystems
@@ -2157,7 +2182,6 @@ CONFIG_IO_WQ=y
 CONFIG_KEYS=y
 # CONFIG_KEYS_REQUEST_CACHE is not set
 CONFIG_PERSISTENT_KEYRINGS=y
-# CONFIG_BIG_KEYS is not set
 # CONFIG_ENCRYPTED_KEYS is not set
 # CONFIG_KEY_DH_OPERATIONS is not set
 # CONFIG_SECURITY_DMESG_RESTRICT is not set
@@ -2168,6 +2192,7 @@ CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y
 # CONFIG_HARDENED_USERCOPY is not set
 CONFIG_FORTIFY_SOURCE=y
 # CONFIG_STATIC_USERMODEHELPER is not set
+# CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT is not set
 CONFIG_DEFAULT_SECURITY_DAC=y
 CONFIG_LSM="yama,loadpin,safesetid,integrity"

@@ -2400,11 +2425,13 @@ CONFIG_GENERIC_STRNLEN_USER=y
 CONFIG_GENERIC_NET_UTILS=y
 CONFIG_GENERIC_FIND_FIRST_BIT=y
 # CONFIG_CORDIC is not set
+# CONFIG_PRIME_NUMBERS is not set
 CONFIG_RATIONAL=y
 CONFIG_GENERIC_PCI_IOMAP=y
 CONFIG_GENERIC_IOMAP=y
 CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
 CONFIG_ARCH_HAS_FAST_MULTIPLIER=y
+CONFIG_ARCH_USE_SYM_ANNOTATIONS=y
 CONFIG_CRC_CCITT=y
 CONFIG_CRC16=y
 CONFIG_CRC_T10DIF=y
@@ -2442,6 +2469,7 @@ CONFIG_DECOMPRESS_LZMA=y
 CONFIG_DECOMPRESS_XZ=y
 CONFIG_DECOMPRESS_LZO=y
 CONFIG_DECOMPRESS_LZ4=y
+CONFIG_GENERIC_ALLOCATOR=y
 CONFIG_INTERVAL_TREE=y
 CONFIG_XARRAY_MULTI=y
 CONFIG_ASSOCIATIVE_ARRAY=y
@@ -2453,6 +2481,7 @@ CONFIG_NEED_DMA_MAP_STATE=y
 CONFIG_ARCH_DMA_ADDR_T_64BIT=y
 CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED=y
 CONFIG_SWIOTLB=y
+CONFIG_DMA_COHERENT_POOL=y
 # CONFIG_DMA_API_DEBUG is not set
 CONFIG_SGL_ALLOC=y
 CONFIG_CPU_RMAP=y
@@ -2489,6 +2518,7 @@ CONFIG_CONSOLE_LOGLEVEL_QUIET=4
 CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
 # CONFIG_BOOT_PRINTK_DELAY is not set
 CONFIG_DYNAMIC_DEBUG=y
+CONFIG_DYNAMIC_DEBUG_CORE=y
 CONFIG_SYMBOLIC_ERRNAME=y
 # CONFIG_DEBUG_BUGVERBOSE is not set
 # end of printk and dmesg options
@@ -2502,7 +2532,6 @@ CONFIG_FRAME_WARN=2048
 CONFIG_STRIP_ASM_SYMS=y
 # CONFIG_READABLE_ASM is not set
 # CONFIG_HEADERS_INSTALL is not set
-CONFIG_OPTIMIZE_INLINING=y
 CONFIG_DEBUG_SECTION_MISMATCH=y
 CONFIG_SECTION_MISMATCH_WARN_ONLY=y
 CONFIG_FRAME_POINTER=y
@@ -2516,12 +2545,12 @@ CONFIG_STACK_VALIDATION=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x1
 CONFIG_MAGIC_SYSRQ_SERIAL=y
+CONFIG_MAGIC_SYSRQ_SERIAL_SEQUENCE=""
 CONFIG_DEBUG_FS=y
 CONFIG_HAVE_ARCH_KGDB=y
 # CONFIG_KGDB is not set
 CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
 # CONFIG_UBSAN is not set
-CONFIG_UBSAN_ALIGNMENT=y
 # end of Generic Kernel Debugging Instruments

 CONFIG_DEBUG_KERNEL=y
@@ -2535,6 +2564,8 @@ CONFIG_DEBUG_MISC=y
 # CONFIG_PAGE_OWNER is not set
 # CONFIG_PAGE_POISONING is not set
 # CONFIG_DEBUG_RODATA_TEST is not set
+CONFIG_ARCH_HAS_DEBUG_WX=y
+# CONFIG_DEBUG_WX is not set
 CONFIG_GENERIC_PTDUMP=y
 # CONFIG_PTDUMP_DEBUGFS is not set
 # CONFIG_DEBUG_OBJECTS is not set
@@ -2544,7 +2575,9 @@ CONFIG_HAVE_DEBUG_KMEMLEAK=y
 # CONFIG_DEBUG_KMEMLEAK is not set
 # CONFIG_DEBUG_STACK_USAGE is not set
 # CONFIG_SCHED_STACK_END_CHECK is not set
+CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE=y
 # CONFIG_DEBUG_VM is not set
+# CONFIG_DEBUG_VM_PGTABLE is not set
 CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
 # CONFIG_DEBUG_VIRTUAL is not set
 CONFIG_DEBUG_MEMORY_INIT=y
@@ -2552,6 +2585,7 @@ CONFIG_DEBUG_MEMORY_INIT=y
 CONFIG_HAVE_ARCH_KASAN=y
 CONFIG_HAVE_ARCH_KASAN_VMALLOC=y
 CONFIG_CC_HAS_KASAN_GENERIC=y
+CONFIG_CC_HAS_WORKING_NOSANITIZE_ADDRESS=y
 # CONFIG_KASAN is not set
 CONFIG_KASAN_STACK=1
 # end of Memory Debugging
@@ -2569,6 +2603,7 @@ CONFIG_HARDLOCKUP_CHECK_TIMESTAMP=y
 # CONFIG_HARDLOCKUP_DETECTOR is not set
 # CONFIG_DETECT_HUNG_TASK is not set
 # CONFIG_WQ_WATCHDOG is not set
+# CONFIG_TEST_LOCKUP is not set
 # end of Debug Oops, Lockups and Hangs

 #
@@ -2643,6 +2678,7 @@ CONFIG_TRACING_SUPPORT=y
 # CONFIG_FTRACE is not set
 # CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set
 # CONFIG_SAMPLES is not set
+CONFIG_HAVE_ARCH_KCSAN=y
 CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
 CONFIG_STRICT_DEVMEM=y
 # CONFIG_IO_STRICT_DEVMEM is not set
@@ -2656,8 +2692,6 @@ CONFIG_EARLY_PRINTK=y
 # CONFIG_EARLY_PRINTK_DBGP is not set
 # CONFIG_EARLY_PRINTK_USB_XDBC is not set
 # CONFIG_EFI_PGT_DUMP is not set
-# CONFIG_DEBUG_WX is not set
-CONFIG_DOUBLEFAULT=y
 # CONFIG_DEBUG_TLBFLUSH is not set
 CONFIG_HAVE_MMIOTRACE_SUPPORT=y
 # CONFIG_X86_DECODER_SELFTEST is not set
@@ -2688,6 +2722,7 @@ CONFIG_CC_HAS_SANCOV_TRACE_PC=y
 CONFIG_RUNTIME_TESTING_MENU=y
 # CONFIG_LKDTM is not set
 # CONFIG_TEST_LIST_SORT is not set
+# CONFIG_TEST_MIN_HEAP is not set
 # CONFIG_TEST_SORT is not set
 # CONFIG_BACKTRACE_SELF_TEST is not set
 # CONFIG_RBTREE_TEST is not set
--- a/rpm/cloud-hypervisor.spec
+++ b/rpm/cloud-hypervisor.spec
@@ -0,0 +1,96 @@
+Name:           cloud-hypervisor
+Summary:        Cloud Hypervisor is an open source Virtual Machine Monitor (VMM) that runs on top of KVM.
+Version:        0.8.0
+Release:        0%{?dist}
+License:        ASL 2.0 or BSD-3-clause
+Group:          Applications/System
+Source0:        https://github.com/cloud-hypervisor/cloud-hypervisor/archive/v%{version}.tar.gz
+ExclusiveArch:  x86_64
+
+BuildRequires:  gcc
+BuildRequires:  glibc-devel
+BuildRequires:  binutils
+BuildRequires:  git
+
+%if 0%{?fedora} || 0%{?rhel}
+BuildRequires:  rust
+BuildRequires:  cargo
+%endif
+
+Requires: bash
+Requires: glibc
+Requires: libgcc
+Requires: libcap
+ 
+%description
+Cloud Hypervisor is an open source Virtual Machine Monitor (VMM) that runs on top of KVM. The project focuses on exclusively running modern, cloud workloads, on top of a limited set of hardware architectures and platforms. Cloud workloads refers to those that are usually run by customers inside a cloud provider. For our purposes this means modern Linux* distributions with most I/O handled by paravirtualised devices (i.e. virtio), no requirement for legacy devices and recent CPUs and KVM.
+
+%prep
+
+%setup -q
+
+%install
+rm -rf %{buildroot}
+install -d %{buildroot}%{_bindir}
+install -D -m755  ./target/x86_64-unknown-linux-gnu/release/cloud-hypervisor %{buildroot}%{_bindir}
+install -D -m755  ./target/x86_64-unknown-linux-gnu/release/ch-remote %{buildroot}%{_bindir}
+install -d %{buildroot}%{_libdir}
+install -d %{buildroot}%{_libdir}/cloud-hypervisor
+install -D -m755 target/x86_64-unknown-linux-gnu/release/vhost_user_blk %{buildroot}%{_libdir}/cloud-hypervisor
+install -D -m755 target/x86_64-unknown-linux-gnu/release/vhost_user_fs %{buildroot}%{_libdir}/cloud-hypervisor
+install -D -m755 target/x86_64-unknown-linux-gnu/release/vhost_user_net %{buildroot}%{_libdir}/cloud-hypervisor
+
+install -d %{buildroot}%{_libdir}/cloud-hypervisor/static
+install -D -m755 target/x86_64-unknown-linux-musl/release/cloud-hypervisor %{buildroot}%{_libdir}/cloud-hypervisor/static
+install -D -m755 target/x86_64-unknown-linux-musl/release/vhost_user_blk %{buildroot}%{_libdir}/cloud-hypervisor/static
+install -D -m755 target/x86_64-unknown-linux-musl/release/vhost_user_fs %{buildroot}%{_libdir}/cloud-hypervisor/static
+install -D -m755 target/x86_64-unknown-linux-musl/release/vhost_user_net %{buildroot}%{_libdir}/cloud-hypervisor/static
+install -D -m755 target/x86_64-unknown-linux-musl/release/ch-remote %{buildroot}%{_libdir}/cloud-hypervisor/static
+
+
+%build
+cargo_version=$(cargo --version)
+if [[ $? -ne 0 ]]; then
+	echo "Cargo not found, please install cargo. exiting"
+	exit 0
+fi
+which rustup
+if [[ $? -ne 0 ]]; then
+	echo "Rustup not found please install rustup #curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh"
+fi
+echo ${cargo_version}
+rustup target list --installed | grep x86_64-unknown-linux-gnu
+if [[ $? -ne 0 ]]; then
+         echo "Target  x86_64-unknown-linux-gnu not found, please install(#rustup target add x86_64-unknown-linux-gnu). exiting"
+fi
+rustup target list --installed | grep x86_64-unknown-linux-musl
+if [[ $? -ne 0 ]]; then
+         echo "Target  x86_64-unknown-linux-musl not found, please install(#rustup target add x86_64-unknown-linux-musl). exiting"
+fi
+
+cargo build --release --target=x86_64-unknown-linux-gnu --all
+cargo build --release --target=x86_64-unknown-linux-musl --all
+
+
+%clean
+rm -rf %{buildroot}
+
+%files
+%defattr(-,root,root,-)
+%{_bindir}/*
+%{_libdir}/cloud-hypervisor
+%license LICENSE-APACHE
+%license LICENSE-BSD-3-Clause
+
+%post
+setcap cap_net_admin+ep %{_bindir}/cloud-hypervisor
+setcap cap_net_admin+ep %{_libdir}/cloud-hypervisor/vhost_user_net
+setcap cap_net_admin+ep %{_libdir}/cloud-hypervisor/static/cloud-hypervisor
+setcap cap_net_admin+ep %{_libdir}/cloud-hypervisor/static/vhost_user_net
+setcap cap_chown,cap_dac_override,cap_dac_read_search,cap_fowner,cap_fsetid,cap_setgid,cap_setuid,cap_mknod,cap_setfcap,cap_sys_admin+epi %{_libdir}/cloud-hypervisor/vhost_user_fs
+setcap cap_chown,cap_dac_override,cap_dac_read_search,cap_fowner,cap_fsetid,cap_setgid,cap_setuid,cap_mknod,cap_setfcap,cap_sys_admin+epi %{_libdir}/cloud-hypervisor/static/vhost_user_fs
+
+
+%changelog
+*   Wed Jul 22 2020 Muminul Islam <muislam@microsoft.com> 0.8.0-0
+-   Initial version
--- a/scripts/create-cloud-init.sh
+++ b/scripts/create-cloud-init.sh
@@ -1,10 +1,6 @@
 #!/bin/bash
 set -x

-rm /tmp/clear-cloudinit.img
-mkdosfs -n config-2 -C /tmp/clear-cloudinit.img 8192
-mcopy -oi /tmp/clear-cloudinit.img -s test_data/cloud-init/clear/openstack ::
-
 rm /tmp/ubuntu-cloudinit.img
 mkdosfs -n cidata -C /tmp/ubuntu-cloudinit.img 8192
 mcopy -oi /tmp/ubuntu-cloudinit.img -s test_data/cloud-init/ubuntu/user-data ::
--- a/scripts/dev_cli.sh
+++ b/scripts/dev_cli.sh
@@ -7,7 +7,7 @@
 CLI_NAME="Cloud Hypervisor"

 CTR_IMAGE_TAG="cloudhypervisor/dev"
-CTR_IMAGE_VERSION="v3"
+CTR_IMAGE_VERSION="v4"
 CTR_IMAGE="${CTR_IMAGE_TAG}:${CTR_IMAGE_VERSION}"

 DOCKER_RUNTIME="docker"
@@ -27,6 +27,10 @@ CTR_CLH_CARGO_BUILT_DIR="${CTR_CLH_ROOT_DIR}/build"
 CTR_CLH_CARGO_TARGET="${CTR_CLH_CARGO_BUILT_DIR}/cargo_target"
 CTR_CLH_INTEGRATION_WORKLOADS="/root/workloads"

+# Container networking option
+CTR_CLH_NET="host"
+[ $(uname -m) = "aarch64" ] && CTR_CLH_NET="bridge"
+
 # Cargo paths
 # Full path to the cargo registry dir on the host. This appears on the host
 # because we want to persist the cargo registry across container invocations.
@@ -167,6 +171,9 @@ cmd_help() {
    echo "    clean [<cargo args>]]"
    echo "        Remove the Cloud Hypervisor artifacts."
    echo ""
+    echo "    shell"
+    echo "        Run the development container into an interactive, privileged BASH shell."
+    echo ""
    echo "    help"
    echo "        Display this help message."
    echo ""
@@ -201,16 +208,11 @@ cmd_build() {
    [ $build = "release" ] && cargo_args+=("--release")
    cargo_args+=(--target "$target")
    [ $(uname -m) = "aarch64" ] && cargo_args+=("--no-default-features")
-    [ $(uname -m) = "aarch64" ] && cargo_args+=(--features "mmio")
+    [ $(uname -m) = "aarch64" ] && cargo_args+=(--features "mmio,kvm")

    rustflags=""
    if [ $(uname -m) = "aarch64" ] && [ $libc = "musl" ] ; then
-        rustflags="-C link-arg=-lgcc"
-    fi
-
-    # A workaround on Arm64 to avoid build errors in kvm-bindings
-    if [ $(uname -m) = "aarch64" ]; then
-        sed -i 's/"with-serde",\ //g' "$CLH_ROOT_DIR"/vmm/Cargo.toml
+        rustflags="-C link-arg=-lgcc -C link_arg=-specs -C link_arg=/usr/lib/aarch64-linux-musl/musl-gcc.specs"
    fi

    $DOCKER_RUNTIME run \
@@ -221,7 +223,7 @@ cmd_build() {
 	   --volume "$CLH_ROOT_DIR:$CTR_CLH_ROOT_DIR" \
 	   --env RUSTFLAGS="$rustflags" \
 	   "$CTR_IMAGE" \
-	   cargo build \
+	   cargo build --all \
 	         --target-dir "$CTR_CLH_CARGO_TARGET" \
 	         "${cargo_args[@]}" && say "Binaries placed under $CLH_CARGO_TARGET/$target/$build"
 }
@@ -309,7 +311,7 @@ cmd_tests() {
 	       --privileged \
 	       --security-opt seccomp=unconfined \
 	       --ipc=host \
-	       --net=host \
+	       --net="$CTR_CLH_NET" \
 	       --mount type=tmpfs,destination=/tmp \
 	       --volume /dev:/dev \
 	       --volume "$CLH_ROOT_DIR:$CTR_CLH_ROOT_DIR" \
@@ -317,7 +319,7 @@ cmd_tests() {
 	       --env USER="root" \
 	       --env CH_LIBC="${libc}" \
 	       "$CTR_IMAGE" \
-	       ./scripts/run_integration_tests.sh "$@" || fix_dir_perms $? || exit $?
+	       ./scripts/run_integration_tests_$(uname -m).sh "$@" || fix_dir_perms $? || exit $?
    fi

    fix_dir_perms $?
@@ -351,6 +353,28 @@ cmd_build-container() {
 	   $BUILD_DIR
 }

+cmd_shell() {
+    say_warn "Starting a privileged shell prompt as root ..."
+    say_warn "WARNING: Your $CLH_ROOT_DIR folder will be bind-mounted in the container under $CTR_CLH_ROOT_DIR"
+    $DOCKER_RUNTIME run \
+	   -ti \
+	   --workdir "$CTR_CLH_ROOT_DIR" \
+	   --rm \
+	   --privileged \
+	   --security-opt seccomp=unconfined \
+	   --ipc=host \
+	   --net="$CTR_CLH_NET" \
+	   --tmpfs /tmp:exec \
+	   --volume /dev:/dev \
+	   --volume "$CLH_ROOT_DIR:$CTR_CLH_ROOT_DIR" \
+	   --volume "$CLH_INTEGRATION_WORKLOADS:$CTR_CLH_INTEGRATION_WORKLOADS" \
+	   --env USER="root" \
+	   --entrypoint bash \
+	   "$CTR_IMAGE"
+
+    fix_dir_perms $?
+}
+
 # Parse main command line args.
 #
 while [ $# -gt 0 ]; do
--- a/scripts/run_cargo_tests.sh
+++ b/scripts/run_cargo_tests.sh
@@ -12,17 +12,14 @@ time which cargo-audit || cargo install cargo-audit
 # Run cargo builds and checks
 time cargo clippy --all-targets --all-features -- -D warnings
 time cargo rustc --bin cloud-hypervisor -- -D warnings
-time cargo rustc --bin vhost_user_net -- -D warnings
+time cargo rustc -p vhost_user_net --bin vhost_user_net -- -D warnings
 time cargo test
 time cargo audit
-time cargo clippy --all-targets --no-default-features --features "pci,acpi" -- -D warnings
-time cargo rustc --bin cloud-hypervisor --no-default-features --features "pci,acpi"  -- -D warnings
-time cargo rustc --bin vhost_user_net --no-default-features --features "pci,acpi"  -- -D warnings
-time cargo clippy --all-targets --no-default-features --features "pci" -- -D warnings
-time cargo rustc --bin cloud-hypervisor --no-default-features --features "pci"  -- -D warnings
-time cargo rustc --bin vhost_user_net --no-default-features --features "pci"  -- -D warnings
-time cargo clippy --all-targets --no-default-features --features "mmio" -- -D warnings
-time cargo rustc --bin cloud-hypervisor --no-default-features --features "mmio"  -- -D warnings
-time cargo rustc --bin vhost_user_net --no-default-features --features "mmio"  -- -D warnings
+time cargo clippy --all-targets --no-default-features --features "pci,acpi,kvm" -- -D warnings
+time cargo rustc --bin cloud-hypervisor --no-default-features --features "pci,acpi,kvm"  -- -D warnings
+time cargo clippy --all-targets --no-default-features --features "pci,kvm" -- -D warnings
+time cargo rustc --bin cloud-hypervisor --no-default-features --features "pci,kvm"  -- -D warnings
+time cargo clippy --all-targets --no-default-features --features "mmio,kvm" -- -D warnings
+time cargo rustc --bin cloud-hypervisor --no-default-features --features "mmio,kvm"  -- -D warnings
 time cargo fmt -- --check
-time cargo build --release
+time cargo build --all --release
--- a/scripts/run_integration_tests_aarch64.sh
+++ b/scripts/run_integration_tests_aarch64.sh
@@ -0,0 +1,239 @@
+#!/bin/bash
+set -x
+
+source $HOME/.cargo/env
+
+export BUILD_TARGET=${BUILD_TARGET-aarch64-unknown-linux-gnu}
+
+WORKLOADS_DIR="$HOME/workloads"
+WORKLOADS_LOCK="$WORKLOADS_DIR/integration_test.lock"
+
+mkdir -p "$WORKLOADS_DIR"
+
+update_workloads() {
+    cp scripts/sha1sums-aarch64 $WORKLOADS_DIR
+
+    BIONIC_OS_IMAGE_DOWNLOAD_NAME="bionic-server-cloudimg-arm64.img"
+    BIONIC_OS_IMAGE_DOWNLOAD_URL="https://cloudhypervisorstorage.blob.core.windows.net/images/$BIONIC_OS_IMAGE_DOWNLOAD_NAME"
+    BIONIC_OS_DOWNLOAD_IMAGE="$WORKLOADS_DIR/$BIONIC_OS_IMAGE_DOWNLOAD_NAME"
+    if [ ! -f "$BIONIC_OS_DOWNLOAD_IMAGE" ]; then
+        pushd $WORKLOADS_DIR
+        time wget --quiet $BIONIC_OS_IMAGE_DOWNLOAD_URL || exit 1
+        popd
+    fi
+
+    BIONIC_OS_RAW_IMAGE_NAME="bionic-server-cloudimg-arm64.raw"
+    BIONIC_OS_RAW_IMAGE="$WORKLOADS_DIR/$BIONIC_OS_RAW_IMAGE_NAME"
+    if [ ! -f "$BIONIC_OS_RAW_IMAGE" ]; then
+        pushd $WORKLOADS_DIR
+        time qemu-img convert -p -f qcow2 -O raw $BIONIC_OS_IMAGE_DOWNLOAD_NAME $BIONIC_OS_RAW_IMAGE_NAME || exit 1
+        popd
+    fi
+
+    # Convert the raw image to qcow2 image to remove compressed blocks from the disk. Therefore letting the
+    # qcow2 format image can be directly used in the integration test.
+    BIONIC_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME="bionic-server-cloudimg-arm64.qcow2"
+    BIONIC_OS_QCOW2_UNCOMPRESSED_IMAGE="$WORKLOADS_DIR/$BIONIC_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME"
+    if [ ! -f "$BIONIC_OS_QCOW2_UNCOMPRESSED_IMAGE" ]; then
+        pushd $WORKLOADS_DIR
+        time qemu-img convert -p -f raw -O qcow2 $BIONIC_OS_RAW_IMAGE_NAME $BIONIC_OS_QCOW2_UNCOMPRESSED_IMAGE || exit 1
+        popd
+    fi
+
+    FOCAL_OS_RAW_IMAGE_NAME="focal-server-cloudimg-arm64-custom.raw"
+    FOCAL_OS_RAW_IMAGE_DOWNLOAD_URL="https://cloudhypervisorstorage.blob.core.windows.net/images/$FOCAL_OS_RAW_IMAGE_NAME"
+    FOCAL_OS_RAW_IMAGE="$WORKLOADS_DIR/$FOCAL_OS_RAW_IMAGE_NAME"
+    if [ ! -f "$FOCAL_OS_RAW_IMAGE" ]; then
+        pushd $WORKLOADS_DIR
+        time wget --quiet $FOCAL_OS_RAW_IMAGE_DOWNLOAD_URL || exit 1
+        popd
+    fi
+
+    # Convert the raw image to qcow2 image to remove compressed blocks from the disk. Therefore letting the
+    # qcow2 format image can be directly used in the integration test.
+    FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME="focal-server-cloudimg-arm64-custom.qcow2"
+    FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_DOWNLOAD_URL="https://cloudhypervisorstorage.blob.core.windows.net/images/$FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME"
+    FOCAL_OS_QCOW2_UNCOMPRESSED_IMAGE="$WORKLOADS_DIR/$FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME"
+    if [ ! -f "$FOCAL_OS_QCOW2_UNCOMPRESSED_IMAGE" ]; then
+        pushd $WORKLOADS_DIR
+        time wget --quiet $FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_DOWNLOAD_URL || exit 1
+        popd
+    fi
+
+    ALPINE_MINIROOTFS_URL="http://dl-cdn.alpinelinux.org/alpine/v3.11/releases/aarch64/alpine-minirootfs-3.11.3-aarch64.tar.gz"
+    ALPINE_MINIROOTFS_TARBALL="$WORKLOADS_DIR/alpine-minirootfs-aarch64.tar.gz"
+    if [ ! -f "$ALPINE_MINIROOTFS_TARBALL" ]; then
+        pushd $WORKLOADS_DIR
+        time wget --quiet $ALPINE_MINIROOTFS_URL -O $ALPINE_MINIROOTFS_TARBALL || exit 1
+        popd
+    fi
+
+    ALPINE_INITRAMFS_IMAGE="$WORKLOADS_DIR/alpine_initramfs.img"
+    if [ ! -f "$ALPINE_INITRAMFS_IMAGE" ]; then
+        pushd $WORKLOADS_DIR
+        mkdir alpine-minirootfs
+        tar xf "$ALPINE_MINIROOTFS_TARBALL" -C alpine-minirootfs
+        cat > alpine-minirootfs/init <<-EOF
+			#! /bin/sh
+			mount -t devtmpfs dev /dev
+			echo \$TEST_STRING > /dev/console
+			poweroff -f
+		EOF
+        chmod +x alpine-minirootfs/init
+        cd alpine-minirootfs
+        find . -print0 |
+            cpio --null --create --verbose --owner root:root --format=newc > "$ALPINE_INITRAMFS_IMAGE"
+        popd
+    fi
+
+    pushd $WORKLOADS_DIR
+    sha1sum sha1sums-aarch64 --check
+    if [ $? -ne 0 ]; then
+        echo "sha1sum validation of images failed, remove invalid images to fix the issue."
+        exit 1
+    fi
+    popd
+
+    # Build custom kernel based on virtio-pmem and virtio-fs upstream patches
+    PE_IMAGE="$WORKLOADS_DIR/Image"
+    LINUX_CUSTOM_DIR="$WORKLOADS_DIR/linux-custom"
+
+    build_custom_linux_kernel() {
+        pushd $LINUX_CUSTOM_DIR
+        time make -j `nproc`
+        cp arch/arm64/boot/Image $WORKLOADS_DIR/Image || exit 1
+        popd
+    }
+
+    SRCDIR=$PWD
+    if [ ! -d "$LINUX_CUSTOM_DIR" ]; then
+        pushd $WORKLOADS_DIR
+        time git clone --depth 1 "https://github.com/cloud-hypervisor/linux.git" -b "virtio-fs-virtio-iommu-5.8-rc4" $LINUX_CUSTOM_DIR
+        cp $SRCDIR/resources/linux-config-aarch64 $LINUX_CUSTOM_DIR/.config
+        popd
+    else
+        pushd $LINUX_CUSTOM_DIR
+        git fetch
+        git checkout -f "virtio-fs-virtio-iommu-5.8-rc4"
+        cp $SRCDIR/resources/linux-config-aarch64 $LINUX_CUSTOM_DIR/.config
+        popd
+    fi
+
+    build_custom_linux_kernel
+
+    VIRTIOFSD="$WORKLOADS_DIR/virtiofsd"
+    QEMU_DIR="qemu_build"
+
+    if [ ! -f "$VIRTIOFSD" ]; then
+        pushd $WORKLOADS_DIR
+        git clone --depth 1 "https://gitlab.com/virtio-fs/qemu.git" -b "virtio-fs-dev" $QEMU_DIR
+        pushd $QEMU_DIR
+        time ./configure --prefix=$PWD --target-list=aarch64-softmmu
+        time make virtiofsd -j `nproc`
+        cp virtiofsd $VIRTIOFSD || exit 1
+        popd
+        rm -rf $QEMU_DIR
+        sudo setcap cap_chown,cap_dac_override,cap_dac_read_search,cap_fowner,cap_fsetid,cap_setgid,cap_setuid,cap_mknod,cap_setfcap,cap_sys_admin+epi "virtiofsd" || exit 1
+        popd
+    fi
+
+    BLK_IMAGE="$WORKLOADS_DIR/blk.img"
+    MNT_DIR="mount_image"
+    if [ ! -f "$BLK_IMAGE" ]; then
+        pushd $WORKLOADS_DIR
+        fallocate -l 16M $BLK_IMAGE
+        mkfs.ext4 -j $BLK_IMAGE
+        mkdir $MNT_DIR
+        sudo mount -t ext4 $BLK_IMAGE $MNT_DIR
+        sudo bash -c "echo bar > $MNT_DIR/foo" || exit 1
+        sudo umount $BLK_IMAGE
+        rm -r $MNT_DIR
+        popd
+    fi
+
+    SHARED_DIR="$WORKLOADS_DIR/shared_dir"
+    if [ ! -d "$SHARED_DIR" ]; then
+        mkdir -p $SHARED_DIR
+        echo "foo" > "$SHARED_DIR/file1"
+        echo "bar" > "$SHARED_DIR/file3" || exit 1
+    fi
+}
+
+# lock the workloads folder to avoid parallel updating by different containers
+(
+    echo "try to lock $WORKLOADS_DIR folder and update"
+    flock -x 12 && update_workloads
+) 12>$WORKLOADS_LOCK
+
+# Check if there is any error in the execution of `update_workloads`.
+# If there is any error, then kill the shell. Otherwise the script will continue
+# running even if the `update_workloads` function was failed.
+RES=$?
+if [ $RES -ne 0 ]; then
+    exit 1
+fi
+
+# Create tap interface without multipe queues support for vhost_user_net test.
+sudo ip tuntap add name vunet-tap0 mode tap
+# Create tap interface with multipe queues support for vhost_user_net test.
+sudo ip tuntap add name vunet-tap1 mode tap multi_queue
+
+BUILD_TARGET="aarch64-unknown-linux-${CH_LIBC}"
+CFLAGS=""
+TARGET_CC=""
+if [[ "${BUILD_TARGET}" == "aarch64-unknown-linux-musl" ]]; then
+TARGET_CC="musl-gcc"
+CFLAGS="-I /usr/include/aarch64-linux-musl/ -idirafter /usr/include/"
+fi
+
+cargo build --all --release --no-default-features --features pci,kvm --target $BUILD_TARGET
+strip target/$BUILD_TARGET/release/cloud-hypervisor
+strip target/$BUILD_TARGET/release/vhost_user_net
+strip target/$BUILD_TARGET/release/ch-remote
+
+# Copy for non-privileged net test
+cp target/$BUILD_TARGET/release/cloud-hypervisor target/$BUILD_TARGET/release/cloud-hypervisor-unprivileged
+
+sudo setcap cap_net_admin+ep target/$BUILD_TARGET/release/cloud-hypervisor
+sudo setcap cap_net_admin+ep target/$BUILD_TARGET/release/vhost_user_net
+
+# Enable KSM with some reasonable parameters so that it won't take too long
+# for the memory to be merged between two processes.
+sudo bash -c "echo 1000000 > /sys/kernel/mm/ksm/pages_to_scan"
+sudo bash -c "echo 10 > /sys/kernel/mm/ksm/sleep_millisecs"
+sudo bash -c "echo 1 > /sys/kernel/mm/ksm/run"
+
+sudo adduser $USER kvm
+newgrp kvm << EOF
+export RUST_BACKTRACE=1
+time cargo test --no-default-features --features "integration_tests,pci,kvm" "tests::parallel::$@" -- --nocapture
+EOF
+RES=$?
+
+if [ $RES -eq 0 ]; then
+    # virtio-mmio based testing
+    cargo build --release --target $BUILD_TARGET --no-default-features --features "mmio,kvm"
+    strip target/$BUILD_TARGET/release/cloud-hypervisor
+    strip target/$BUILD_TARGET/release/vhost_user_net
+    strip target/$BUILD_TARGET/release/ch-remote
+
+    sudo setcap cap_net_admin+ep target/$BUILD_TARGET/release/cloud-hypervisor
+    sudo setcap cap_net_admin+ep target/$BUILD_TARGET/release/vhost_user_net
+
+    # Ensure test binary has the same caps as the cloud-hypervisor one
+    time cargo test --no-run --no-default-features --features "integration_tests,mmio,kvm" -- --nocapture || exit 1
+    ls target/debug/deps/cloud_hypervisor-* | xargs -n 1 sudo setcap cap_net_admin+ep
+
+    newgrp kvm << EOF
+export RUST_BACKTRACE=1
+time cargo test --no-default-features --features "integration_tests,mmio,kvm" "tests::parallel::$@" -- --nocapture
+EOF
+
+    RES=$?
+fi
+
+# Tear vhost_user_net test network down
+sudo ip link del vunet-tap0
+sudo ip link del vunet-tap1
+
+exit $RES
--- a/scripts/run_integration_tests_x86_64.sh
+++ b/scripts/run_integration_tests_x86_64.sh
@@ -8,7 +8,7 @@ export BUILD_TARGET=${BUILD_TARGET-x86_64-unknown-linux-gnu}
 WORKLOADS_DIR="$HOME/workloads"
 mkdir -p "$WORKLOADS_DIR"

-cp scripts/sha1sums $WORKLOADS_DIR
+cp scripts/sha1sums-x86_64 $WORKLOADS_DIR

 FW_URL=$(curl --silent https://api.github.com/repos/cloud-hypervisor/rust-hypervisor-firmware/releases/latest | grep "browser_download_url" | grep -o 'https://.*[^ "]')
 FW="$WORKLOADS_DIR/hypervisor-fw"
@@ -18,24 +18,7 @@ if [ ! -f "$FW" ]; then
    popd
 fi

-CLEAR_OS_IMAGE_NAME="clear-31311-cloudguest.img"
-CLEAR_OS_IMAGE_URL="https://cloudhypervisorstorage.blob.core.windows.net/images/$CLEAR_OS_IMAGE_NAME"
-CLEAR_OS_IMAGE="$WORKLOADS_DIR/$CLEAR_OS_IMAGE_NAME"
-if [ ! -f "$CLEAR_OS_IMAGE" ]; then
-    pushd $WORKLOADS_DIR
-    time wget --quiet $CLEAR_OS_IMAGE_URL || exit 1
-    popd
-fi
-
-CLEAR_OS_RAW_IMAGE_NAME="clear-31311-cloudguest-raw.img"
-CLEAR_OS_RAW_IMAGE="$WORKLOADS_DIR/$CLEAR_OS_RAW_IMAGE_NAME"
-if [ ! -f "$CLEAR_OS_RAW_IMAGE" ]; then
-    pushd $WORKLOADS_DIR
-    time qemu-img convert -p -f qcow2 -O raw $CLEAR_OS_IMAGE_NAME $CLEAR_OS_RAW_IMAGE_NAME || exit 1
-    popd
-fi
-
-BIONIC_OS_IMAGE_NAME="bionic-server-cloudimg-amd64.img"
+BIONIC_OS_IMAGE_NAME="bionic-server-cloudimg-amd64.qcow2"
 BIONIC_OS_IMAGE_URL="https://cloudhypervisorstorage.blob.core.windows.net/images/$BIONIC_OS_IMAGE_NAME"
 BIONIC_OS_IMAGE="$WORKLOADS_DIR/$BIONIC_OS_IMAGE_NAME"
 if [ ! -f "$BIONIC_OS_IMAGE" ]; then
@@ -44,7 +27,7 @@ if [ ! -f "$BIONIC_OS_IMAGE" ]; then
    popd
 fi

-BIONIC_OS_RAW_IMAGE_NAME="bionic-server-cloudimg-amd64-raw.img"
+BIONIC_OS_RAW_IMAGE_NAME="bionic-server-cloudimg-amd64.raw"
 BIONIC_OS_RAW_IMAGE="$WORKLOADS_DIR/$BIONIC_OS_RAW_IMAGE_NAME"
 if [ ! -f "$BIONIC_OS_RAW_IMAGE" ]; then
    pushd $WORKLOADS_DIR
@@ -53,7 +36,7 @@ if [ ! -f "$BIONIC_OS_RAW_IMAGE" ]; then
 fi


-FOCAL_OS_IMAGE_NAME="focal-server-cloudimg-amd64.img"
+FOCAL_OS_IMAGE_NAME="focal-server-cloudimg-amd64-custom.qcow2"
 FOCAL_OS_IMAGE_URL="https://cloudhypervisorstorage.blob.core.windows.net/images/$FOCAL_OS_IMAGE_NAME"
 FOCAL_OS_IMAGE="$WORKLOADS_DIR/$FOCAL_OS_IMAGE_NAME"
 if [ ! -f "$FOCAL_OS_IMAGE" ]; then
@@ -62,7 +45,7 @@ if [ ! -f "$FOCAL_OS_IMAGE" ]; then
    popd
 fi

-FOCAL_OS_RAW_IMAGE_NAME="focal-server-cloudimg-amd64-raw.img"
+FOCAL_OS_RAW_IMAGE_NAME="focal-server-cloudimg-amd64-custom.raw"
 FOCAL_OS_RAW_IMAGE="$WORKLOADS_DIR/$FOCAL_OS_RAW_IMAGE_NAME"
 if [ ! -f "$FOCAL_OS_RAW_IMAGE" ]; then
    pushd $WORKLOADS_DIR
@@ -97,7 +80,7 @@ if [ ! -f "$ALPINE_INITRAMFS_IMAGE" ]; then
 fi

 pushd $WORKLOADS_DIR
-sha1sum sha1sums --check
+sha1sum sha1sums-x86_64 --check
 if [ $? -ne 0 ]; then
    echo "sha1sum validation of images failed, remove invalid images to fix the issue."
    exit 1
@@ -114,8 +97,8 @@ LINUX_CUSTOM_DIR="$WORKLOADS_DIR/linux-custom"
 if [ ! -f "$VMLINUX_IMAGE" ] || [ ! -f "$VMLINUX_PVH_IMAGE" ]; then
    SRCDIR=$PWD
    pushd $WORKLOADS_DIR
-    time git clone --depth 1 "https://github.com/cloud-hypervisor/linux.git" -b "virtio-fs-virtio-iommu-virtio-mem-5.6-rc4" $LINUX_CUSTOM_DIR
-    cp $SRCDIR/resources/linux-config $LINUX_CUSTOM_DIR/.config
+    time git clone --depth 1 "https://github.com/cloud-hypervisor/linux.git" -b "virtio-fs-virtio-iommu-5.8-rc4" $LINUX_CUSTOM_DIR
+    cp $SRCDIR/resources/linux-config-x86_64 $LINUX_CUSTOM_DIR/.config
    popd
 fi

@@ -144,14 +127,14 @@ VIRTIOFSD="$WORKLOADS_DIR/virtiofsd"
 QEMU_DIR="qemu_build"
 if [ ! -f "$VIRTIOFSD" ]; then
    pushd $WORKLOADS_DIR
-    git clone --depth 1 "https://github.com/sboeuf/qemu.git" -b "virtio-fs" $QEMU_DIR
+    git clone --depth 1 "https://gitlab.com/virtio-fs/qemu.git" -b "virtio-fs-dev" $QEMU_DIR
    pushd $QEMU_DIR
    time ./configure --prefix=$PWD --target-list=x86_64-softmmu
    time make virtiofsd -j `nproc`
    cp virtiofsd $VIRTIOFSD || exit 1
    popd
    rm -rf $QEMU_DIR
-    sudo setcap cap_dac_override,cap_sys_admin+epi "virtiofsd" || exit 1
+    sudo setcap cap_chown,cap_dac_override,cap_dac_read_search,cap_fowner,cap_fsetid,cap_setgid,cap_setuid,cap_mknod,cap_setfcap,cap_sys_admin+epi "virtiofsd" || exit 1
    popd
 fi

@@ -179,7 +162,7 @@ fi
 VFIO_DIR="$WORKLOADS_DIR/vfio"
 rm -rf $VFIO_DIR
 mkdir -p $VFIO_DIR
-cp $CLEAR_OS_IMAGE $VFIO_DIR
+cp $FOCAL_OS_IMAGE $VFIO_DIR
 cp $FW $VFIO_DIR
 cp $VMLINUX_IMAGE $VFIO_DIR || exit 1

@@ -218,7 +201,7 @@ TARGET_CC="musl-gcc"
 CFLAGS="-I /usr/include/x86_64-linux-musl/ -idirafter /usr/include/"
 fi

-cargo build --release --target $BUILD_TARGET
+cargo build --all --release --target $BUILD_TARGET
 strip target/$BUILD_TARGET/release/cloud-hypervisor
 strip target/$BUILD_TARGET/release/vhost_user_net
 strip target/$BUILD_TARGET/release/ch-remote
@@ -239,24 +222,34 @@ sudo bash -c "echo 1000000 > /sys/kernel/mm/ksm/pages_to_scan"
 sudo bash -c "echo 10 > /sys/kernel/mm/ksm/sleep_millisecs"
 sudo bash -c "echo 1 > /sys/kernel/mm/ksm/run"

-# Ensure test binary has the same caps as the cloud-hypervisor one
-time cargo test --no-run --features "integration_tests" -- --nocapture || exit 1
-ls target/debug/deps/cloud_hypervisor-* | xargs -n 1 sudo setcap cap_net_admin+ep
-
 # test_vfio relies on hugepages
 echo 4096 | sudo tee /proc/sys/vm/nr_hugepages
 sudo chmod a+rwX /dev/hugepages

+# Ensure test binary has the same caps as the cloud-hypervisor one
+time cargo test --no-run --features "integration_tests" -- --nocapture || exit 1
+ls target/debug/deps/cloud_hypervisor-* | xargs -n 1 sudo setcap cap_net_admin+ep
+
 sudo adduser $USER kvm
 newgrp kvm << EOF
 export RUST_BACKTRACE=1
-time cargo test --features "integration_tests" "$@" -- --nocapture
+time cargo test --features "integration_tests" "tests::parallel::$@" -- --nocapture
 EOF
 RES=$?

+# Run some tests in sequence since the result could be affected by other tests
+# running in parallel.
+if [ $RES -eq 0 ]; then
+    newgrp kvm << EOF
+export RUST_BACKTRACE=1
+time cargo test --features "integration_tests" "tests::sequential::$@" -- --nocapture --test-threads=1
+EOF
+    RES=$?
+fi
+
 if [ $RES -eq 0 ]; then
    # virtio-mmio based testing
-    cargo build --release --target $BUILD_TARGET --no-default-features --features "mmio"
+    cargo build --all --release --target $BUILD_TARGET --no-default-features --features "mmio,kvm"
    strip target/$BUILD_TARGET/release/cloud-hypervisor
    strip target/$BUILD_TARGET/release/vhost_user_net
    strip target/$BUILD_TARGET/release/ch-remote
@@ -269,10 +262,20 @@ if [ $RES -eq 0 ]; then

    newgrp kvm << EOF
 export RUST_BACKTRACE=1
-time cargo test --features "integration_tests,mmio" "$@" -- --nocapture
+time cargo test --features "integration_tests,mmio" "tests::parallel::$@" -- --nocapture
 EOF

    RES=$?
+
+    # Run some tests in sequence since the result could be affected by other tests
+    # running in parallel.
+    if [ $RES -eq 0 ]; then
+        newgrp kvm << EOF
+export RUST_BACKTRACE=1
+time cargo test --features "integration_tests,mmio" "tests::sequential::$@" -- --nocapture --test-threads=1
+EOF
+        RES=$?
+    fi
 fi

 # Tear VFIO test network down
--- a/scripts/run_unit_tests.sh
+++ b/scripts/run_unit_tests.sh
@@ -3,8 +3,12 @@
 source $HOME/.cargo/env

 BUILD_TARGET=${BUILD_TARGET-x86_64-unknown-linux-gnu}
+cargo_args=("$@")
+[ $(uname -m) = "aarch64" ] && cargo_args+=("--no-default-features")
+[ $(uname -m) = "aarch64" ] && cargo_args+=("--features mmio,kvm")
+[ $(uname -m) = "aarch64" ] && sed -i 's/"with-serde",\ //g' hypervisor/Cargo.toml

-cargo test --target $BUILD_TARGET --workspace --no-run
+cargo test --target $BUILD_TARGET --workspace --no-run ${cargo_args[@]}
 pushd target/$BUILD_TARGET/debug
 ls  | grep net_util | grep -v "\.d" | xargs -n 1 sudo setcap cap_net_admin,cap_net_raw+ep
 popd
@@ -12,5 +16,5 @@ popd
 sudo adduser $USER kvm
 newgrp kvm << EOF || exit 1
  export RUST_BACKTRACE=1
-  cargo test --target $BUILD_TARGET --workspace "$@" || exit 1;
+  cargo test --target $BUILD_TARGET --workspace ${cargo_args[@]} || exit 1;
 EOF
--- a/scripts/sha1sums
+++ b/scripts/sha1sums
@@ -1,7 +0,0 @@
-cf7cfa783082fc4d6b4d1c0a53e4402648c14b82 clear-31311-cloudguest.img
-142a410546b592ff9536b46bb410faf8ac11edee clear-31311-cloudguest-raw.img
-27f3b17962ace69b51f0ddc2012095e3109e6ed8 bionic-server-cloudimg-amd64.img
-8db9cc58b01452ce2d06c313177e6e74d8582d93 bionic-server-cloudimg-amd64-raw.img
-d4a44acc6014d5f83dea1c625c43d677a95fa75f alpine-minirootfs-x86_64.tar.gz
-3cab64475048383e70a38550734e98961cfe0fd6 focal-server-cloudimg-amd64-raw.img
-c74a95665b189f93cb16a2c1770820c6a6a43fb0 focal-server-cloudimg-amd64.img
--- a/scripts/sha1sums-aarch64
+++ b/scripts/sha1sums-aarch64
@@ -0,0 +1,6 @@
+6fee67adbfed8db7a225be23ee9d90b5bd7f19e6  bionic-server-cloudimg-arm64.img
+786fe1c33588334e92b35c65e414da068df180bc  bionic-server-cloudimg-arm64.raw
+34039f2fc4242acff0d42af82fbee91070978da3  bionic-server-cloudimg-arm64.qcow2
+e4addb6e212a298144f9eb0eb6e36019d013f0e7  alpine-minirootfs-aarch64.tar.gz
+063d1a9f32db641138e6e0c53f58e6545a3d48e6  focal-server-cloudimg-arm64-custom.raw
+013837926872f1c7d1b3a1a95305e4a31c8600ab  focal-server-cloudimg-arm64-custom.qcow2
--- a/scripts/sha1sums-x86_64
+++ b/scripts/sha1sums-x86_64
@@ -0,0 +1,5 @@
+27f3b17962ace69b51f0ddc2012095e3109e6ed8 bionic-server-cloudimg-amd64.qcow2
+8db9cc58b01452ce2d06c313177e6e74d8582d93 bionic-server-cloudimg-amd64.raw
+d4a44acc6014d5f83dea1c625c43d677a95fa75f alpine-minirootfs-x86_64.tar.gz
+f131563d3aa466cb5d2c25ffe7007c9cb8d15818 focal-server-cloudimg-amd64-custom.qcow2
+d5a08d2b35d48042d2c08fdc0c31ae656073f43e focal-server-cloudimg-amd64-custom.raw
--- a/src/bin/ch-remote.rs
+++ b/src/bin/ch-remote.rs
@@ -23,6 +23,7 @@ enum Error {
    ServerResponse(StatusCode, Option<String>),
    InvalidCPUCount(std::num::ParseIntError),
    InvalidMemorySize(std::num::ParseIntError),
+    InvalidBalloonSize(std::num::ParseIntError),
    AddDeviceConfig(vmm::config::Error),
    AddDiskConfig(vmm::config::Error),
    AddFsConfig(vmm::config::Error),
@@ -49,6 +50,7 @@ impl fmt::Display for Error {
            }
            InvalidCPUCount(e) => write!(f, "Error parsing CPU count: {}", e),
            InvalidMemorySize(e) => write!(f, "Error parsing memory size: {}", e),
+            InvalidBalloonSize(e) => write!(f, "Error parsing balloon size: {}", e),
            AddDeviceConfig(e) => write!(f, "Error parsing device syntax: {}", e),
            AddDiskConfig(e) => write!(f, "Error parsing disk syntax: {}", e),
            AddFsConfig(e) => write!(f, "Error parsing filesystem syntax: {}", e),
@@ -204,6 +206,7 @@ fn resize_api_command(
    socket: &mut UnixStream,
    cpus: Option<&str>,
    memory: Option<&str>,
+    balloon: Option<&str>,
 ) -> Result<(), Error> {
    let desired_vcpus: Option<u8> = if let Some(cpus) = cpus {
        Some(cpus.parse().map_err(Error::InvalidCPUCount)?)
@@ -217,9 +220,16 @@ fn resize_api_command(
        None
    };

+    let desired_ram_w_balloon: Option<u64> = if let Some(balloon) = balloon {
+        Some(balloon.parse().map_err(Error::InvalidBalloonSize)?)
+    } else {
+        None
+    };
+
    let resize = vmm::api::VmResizeData {
        desired_vcpus,
        desired_ram,
+        desired_ram_w_balloon,
    };

    simple_api_command(
@@ -337,6 +347,7 @@ fn do_command(matches: &ArgMatches) -> Result<(), Error> {

    match matches.subcommand_name() {
        Some("info") => simple_api_command(&mut socket, "GET", "info", None),
+        Some("counters") => simple_api_command(&mut socket, "GET", "counters", None),
        Some("resize") => resize_api_command(
            &mut socket,
            matches
@@ -347,6 +358,10 @@ fn do_command(matches: &ArgMatches) -> Result<(), Error> {
                .subcommand_matches("resize")
                .unwrap()
                .value_of("memory"),
+            matches
+                .subcommand_matches("resize")
+                .unwrap()
+                .value_of("balloon"),
        ),
        Some("add-device") => add_device_api_command(
            &mut socket,
@@ -498,6 +513,7 @@ fn main() {
                .arg(Arg::with_name("id").index(1).help("<device_id>")),
        )
        .subcommand(SubCommand::with_name("info").about("Info on the VM"))
+        .subcommand(SubCommand::with_name("counters").about("Counters from the VM"))
        .subcommand(SubCommand::with_name("pause").about("Pause the VM"))
        .subcommand(SubCommand::with_name("reboot").about("Reboot the VM"))
        .subcommand(
@@ -516,6 +532,13 @@ fn main() {
                        .help("New memory size (in MiB)")
                        .takes_value(true)
                        .number_of_values(1),
+                )
+                .arg(
+                    Arg::with_name("balloon")
+                        .long("balloon")
+                        .help("New memory with balloon size")
+                        .takes_value(true)
+                        .number_of_values(1),
                ),
        )
        .subcommand(SubCommand::with_name("resume").about("Resume the VM"))
--- a/src/main.rs
+++ b/src/main.rs
@@ -12,7 +12,7 @@ extern crate clap;
 use clap::{App, Arg, ArgGroup, ArgMatches};
 use libc::EFD_NONBLOCK;
 use log::LevelFilter;
-use seccomp::SeccompLevel;
+use seccomp::SeccompAction;
 use std::sync::mpsc::channel;
 use std::sync::{Arc, Mutex};
 use std::{env, process};
@@ -78,7 +78,12 @@ fn create_app<'a, 'b>(
    default_rng: &'a str,
    api_server_path: &'a str,
 ) -> App<'a, 'b> {
-    App::new("cloud-hypervisor")
+    #[cfg(target_arch = "x86_64")]
+    let mut app: App;
+    #[cfg(target_arch = "aarch64")]
+    let app: App;
+
+    app = App::new("cloud-hypervisor")
        // 'BUILT_VERSION' is set by the build script 'build.rs' at
        // compile time
        .version(env!("BUILT_VERSION"))
@@ -90,7 +95,10 @@ fn create_app<'a, 'b>(
        .arg(
            Arg::with_name("cpus")
                .long("cpus")
-                .help("Number of virtual CPUs")
+                .help(
+                    "boot=<boot_vcpus>,max=<max_vcpus>,\
+                    topology=<threads_per_core>:<cores_per_die>:<dies_per_package>:<packages>",
+                )
                .default_value(&default_vcpus)
                .group("vm-config"),
        )
@@ -252,9 +260,23 @@ fn create_app<'a, 'b>(
            Arg::with_name("seccomp")
                .long("seccomp")
                .takes_value(true)
-                .possible_values(&["true", "false"])
+                .possible_values(&["true", "false", "log"])
                .default_value("true"),
-        )
+        );
+
+    #[cfg(target_arch = "x86_64")]
+    {
+        app = app.arg(
+            Arg::with_name("sgx-epc")
+                .long("sgx-epc")
+                .help(config::SgxEpcConfig::SYNTAX)
+                .takes_value(true)
+                .min_values(1)
+                .group("vm-config"),
+        );
+    }
+
+    app
 }

 fn start_vmm(cmd_arguments: ArgMatches) {
@@ -266,27 +288,28 @@ fn start_vmm(cmd_arguments: ArgMatches) {
    let api_evt = EventFd::new(EFD_NONBLOCK).expect("Cannot create API EventFd");

    let http_sender = api_request_sender.clone();
-
-    let seccomp_level = if let Some(seccomp_value) = cmd_arguments.value_of("seccomp") {
+    let seccomp_action = if let Some(seccomp_value) = cmd_arguments.value_of("seccomp") {
        match seccomp_value {
-            "true" => SeccompLevel::Advanced,
-            "false" => SeccompLevel::None,
+            "true" => SeccompAction::Trap,
+            "false" => SeccompAction::Allow,
+            "log" => SeccompAction::Log,
            _ => {
                eprintln!("Invalid parameter {} for \"--seccomp\" flag", seccomp_value);
                process::exit(1);
            }
        }
    } else {
-        SeccompLevel::Advanced
+        SeccompAction::Trap
    };
-
+    let hypervisor = hypervisor::new().unwrap();
    let vmm_thread = match vmm::start_vmm_thread(
        env!("CARGO_PKG_VERSION").to_string(),
        api_socket_path,
        api_evt.try_clone().unwrap(),
        http_sender,
        api_request_receiver,
-        &seccomp_level,
+        &seccomp_action,
+        hypervisor,
    ) {
        Ok(t) => t,
        Err(e) => {
@@ -487,6 +510,7 @@ mod unit_tests {
                cpus: CpusConfig {
                    boot_vcpus: 1,
                    max_vcpus: 1,
+                    topology: None,
                },
                memory: MemoryConfig {
                    size: 536_870_912,
@@ -496,6 +520,8 @@ mod unit_tests {
                    hotplug_size: None,
                    shared: false,
                    hugepages: false,
+                    balloon: false,
+                    balloon_size: 0,
                },
                kernel: Some(KernelConfig {
                    path: PathBuf::from("/path/to/kernel"),
@@ -525,6 +551,8 @@ mod unit_tests {
                devices: None,
                vsock: None,
                iommu: false,
+                #[cfg(target_arch = "x86_64")]
+                sgx_epc: None,
            };

            aver_eq!(tb, expected_vm_config, result_vm_config);
@@ -908,6 +936,7 @@ mod unit_tests {
                }"#,
                true,
            ),
+            #[cfg(target_arch = "x86_64")]
            (
                vec![
                    "cloud-hypervisor", "--kernel", "/path/to/kernel",
@@ -922,6 +951,7 @@ mod unit_tests {
                }"#,
                false,
            ),
+            #[cfg(target_arch = "x86_64")]
            (
                vec![
                    "cloud-hypervisor", "--kernel", "/path/to/kernel",
@@ -1201,6 +1231,7 @@ mod unit_tests {
                }"#,
                true,
            ),
+            #[cfg(target_arch = "x86_64")]
            (
                vec![
                    "cloud-hypervisor",
@@ -1218,6 +1249,7 @@ mod unit_tests {
                }"#,
                true,
            ),
+            #[cfg(target_arch = "x86_64")]
            (
                vec![
                    "cloud-hypervisor",
@@ -1234,6 +1266,7 @@ mod unit_tests {
                }"#,
                false,
            ),
+            #[cfg(target_arch = "x86_64")]
            (
                vec![
                    "cloud-hypervisor",
@@ -1250,6 +1283,7 @@ mod unit_tests {
                }"#,
                true,
            ),
+            #[cfg(target_arch = "x86_64")]
            (
                vec![
                    "cloud-hypervisor",
@@ -1325,6 +1359,7 @@ mod unit_tests {
    }

    #[test]
+    #[cfg(target_arch = "x86_64")]
    fn test_valid_vm_config_devices() {
        vec![
            (
@@ -1449,6 +1484,7 @@ mod unit_tests {
                }"#,
                false,
            ),
+            #[cfg(target_arch = "x86_64")]
            (
                vec![
                    "cloud-hypervisor",
@@ -1464,6 +1500,7 @@ mod unit_tests {
                }"#,
                true,
            ),
+            #[cfg(target_arch = "x86_64")]
            (
                vec![
                    "cloud-hypervisor",
--- a/test_data/cloud-init/clear/openstack/latest/meta_data.json
+++ b/test_data/cloud-init/clear/openstack/latest/meta_data.json
@@ -1,3 +0,0 @@
-{
-  "hostname" : "cloud"
-}
--- a/test_data/cloud-init/clear/openstack/latest/user_data
+++ b/test_data/cloud-init/clear/openstack/latest/user_data
@@ -1,80 +0,0 @@
-#cloud-config
-users:
-  - name: cloud
-    passwd: $6$7125787751a8d18a$sHwGySomUA1PawiNFWVCKYQN.Ec.Wzz0JtPPL1MvzFrkwmop2dq7.4CYf03A5oemPQ4pOFCCrtCelvFBEle/K.
-    sudo:
-      - ALL=(ALL) NOPASSWD:ALL
-write_files:
-  -
-    path: /etc/systemd/network/00-static-l1.network
-    permissions: 0644
-    content: |
-        [Match]
-        MACAddress=12:34:56:78:90:ab
-
-        [Network]
-        Address=192.168.2.2/24
-        Gateway=192.168.2.1
-
-  -
-    path: /etc/systemd/network/00-static-l2-1.network
-    permissions: 0644
-    content: |
-        [Match]
-        MACAddress=de:ad:be:ef:12:34
-
-        [Network]
-        Address=192.168.2.3/24
-        Gateway=192.168.2.1
-
-  -
-    path: /etc/systemd/network/00-static-l2-2.network
-    permissions: 0644
-    content: |
-        [Match]
-        MACAddress=de:ad:be:ef:34:56
-
-        [Network]
-        Address=192.168.2.4/24
-        Gateway=192.168.2.1
-
-  -
-    path: /etc/systemd/network/00-static-l2-3.network
-    permissions: 0644
-    content: |
-        [Match]
-        MACAddress=de:ad:be:ef:56:78
-
-        [Network]
-        Address=192.168.2.5/24
-        Gateway=192.168.2.1
-
-  -
-    path: /etc/systemd/system/vfio.service
-    permissions: 0644
-    content: |
-        [Unit]
-        Description=VFIO test systemd service
-
-        [Service]
-        Type=simple
-        ExecStart=/bin/bash /usr/bin/cloud-hypervisor-vfio.sh
-
-        [Install]
-        WantedBy=multi-user.target
-
-  -
-    path: /usr/bin/cloud-hypervisor-vfio.sh
-    permissions: 0755
-    content: |
-        #!/bin/bash
-
-        mount -t virtiofs -o dax myfs /mnt
-        bash -c "echo 0000:00:05.0 > /sys/bus/pci/devices/0000\:00\:05.0/driver/unbind"
-        bash -c "echo 1af4 1041 > /sys/bus/pci/drivers/vfio-pci/new_id"
-        bash -c "echo 0000:00:06.0 > /sys/bus/pci/devices/0000\:00\:06.0/driver/unbind"
-        bash -c "echo 1af4 1041 > /sys/bus/pci/drivers/vfio-pci/new_id"
-        # 1G ram requires 512 pages
-        echo 512 | sudo tee /proc/sys/vm/nr_hugepages
-        sudo chmod a+rwX /dev/hugepages
-        /mnt/cloud-hypervisor --kernel /mnt/vmlinux --cmdline "console=hvc0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=PARTUUID=6fb4d1a8-6c8c-4dd7-9f7c-1fe0b9f2574c VFIOTAG" --disk path=/mnt/clear-31311-cloudguest.img path=/mnt/cloudinit.img --cpus boot=1 --memory size=512M,hotplug_size=1G,file=/dev/hugepages --device path=/sys/bus/pci/devices/0000:00:05.0/ path=/sys/bus/pci/devices/0000:00:06.0/ --api-socket /tmp/ch_api.sock
--- a/test_data/cloud-init/ubuntu/network-config
+++ b/test_data/cloud-init/ubuntu/network-config
@@ -1,12 +1,26 @@
-network:
-  version: 1
-  config:
-    - type: physical
-      name: eth0
-      mac_address: 12:34:56:78:90:ab
-      subnets:
-         - type: static
-           address: 192.168.2.2/24
-           gateway: 192.168.2.1
-           dns_nameservers:
-              - 192.168.2.1
+version: 2
+ethernets:
+  id0:
+    match:
+      macaddress: 12:34:56:78:90:ab
+    addresses:
+    - 192.168.2.2/24
+    gateway4: 192.168.2.1
+  id1:
+    match:
+      macaddress: de:ad:be:ef:12:34
+    addresses:
+    - 192.168.2.3/24
+    gateway4: 192.168.2.1
+  id2:
+    match:
+      macaddress: de:ad:be:ef:34:56
+    addresses:
+    - 192.168.2.4/24
+    gateway4: 192.168.2.1
+  id3:
+    match:
+      macaddress: de:ad:be:ef:56:78
+    addresses:
+    - 192.168.2.5/24
+    gateway4: 192.168.2.1
--- a/test_data/cloud-init/ubuntu/user-data
+++ b/test_data/cloud-init/ubuntu/user-data
@@ -7,4 +7,35 @@ users:
    inactive: False
    shell: /bin/bash

-ssh_pwauth: True
+ssh_pwauth: True
+
+write_files:
+  -
+    path: /etc/systemd/system/vfio.service
+    permissions: 0644
+    content: |
+        [Unit]
+        Description=VFIO test systemd service
+
+        [Service]
+        Type=simple
+        ExecStart=/bin/bash /usr/bin/cloud-hypervisor-vfio.sh
+
+        [Install]
+        WantedBy=multi-user.target
+
+  -
+    path: /usr/bin/cloud-hypervisor-vfio.sh
+    permissions: 0755
+    content: |
+        #!/bin/bash
+
+        mount -t virtiofs -o dax myfs /mnt
+        bash -c "echo 0000:00:05.0 > /sys/bus/pci/devices/0000\:00\:05.0/driver/unbind"
+        bash -c "echo 1af4 1041 > /sys/bus/pci/drivers/vfio-pci/new_id"
+        bash -c "echo 0000:00:06.0 > /sys/bus/pci/devices/0000\:00\:06.0/driver/unbind"
+        bash -c "echo 1af4 1041 > /sys/bus/pci/drivers/vfio-pci/new_id"
+        # 1G ram requires 512 pages
+        echo 512 | sudo tee /proc/sys/vm/nr_hugepages
+        sudo chmod a+rwX /dev/hugepages
+        /mnt/cloud-hypervisor --kernel /mnt/vmlinux --cmdline "console=hvc0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda1 VFIOTAG" --disk path=/mnt/focal-server-cloudimg-amd64-custom.qcow2 path=/mnt/cloudinit.img --cpus boot=1 --memory size=512M,hotplug_size=1G,file=/dev/hugepages --device path=/sys/bus/pci/devices/0000:00:05.0/ path=/sys/bus/pci/devices/0000:00:06.0/ --api-socket /tmp/ch_api.sock
--- a/tests/integration.rs
+++ b/tests/integration.rs
--- a/vhost_user_backend/Cargo.toml
+++ b/vhost_user_backend/Cargo.toml
@@ -6,13 +6,11 @@ edition = "2018"

 [features]
 default = []
-pci_support = ["vm-virtio/pci_support"]
-mmio_support = ["vm-virtio/mmio_support"]

 [dependencies]
 epoll = ">=4.0.1"
-libc = "0.2.71"
-log = "0.4.8"
+libc = "0.2.74"
+log = "0.4.11"
 virtio-bindings = "0.1.0"
 vm-memory = "0.2.1"
 vm-virtio = { path = "../vm-virtio" }
--- a/Show More
+++ b/Show More