build: Release v20.0

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
arch: x86_64: Only reserve used 32-bit address space
2026-08-05 02:19:16 +00:00 · 2021-12-02 16:47:41 +01:00 · 2021-12-02 16:42:01 +01:00 · 2021-12-02 14:24:38 +00:00 · 2021-12-02 12:43:11 +01:00 · 2021-12-01 10:31:54 +00:00
188 changed files with 19759 additions and 8793 deletions
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -31,14 +31,23 @@ jobs:

      - name: Debug Check (default features)
        run: |
-          git rev-list origin/master..$GITHUB_SHA | xargs -t -I % sh -c 'git checkout %; cargo check --all --target=${{ matrix.target }}'
+          git rev-list origin/main..$GITHUB_SHA | xargs -t -I % sh -c 'git checkout %; cargo check --all --target=${{ matrix.target }}'
          git checkout $GITHUB_SHA

+      - name: Build (default + tdx)
+        run: cargo rustc --bin cloud-hypervisor --features "tdx" -- -D warnings
+
      - name: Build (acpi,kvm)
        run: cargo rustc --bin cloud-hypervisor --no-default-features --features "acpi,kvm"  -- -D warnings

      - name: Build (kvm)
        run: cargo rustc --bin cloud-hypervisor --no-default-features --features "kvm"  -- -D warnings
+
+      - name: Build (acpi,mshv)
+        run: cargo rustc --bin cloud-hypervisor --no-default-features --features "acpi,mshv"  -- -D warnings
+
+      - name: Build (mshv)
+        run: cargo rustc --bin cloud-hypervisor --no-default-features --features "mshv"  -- -D warnings
        
      - name: Release Build (default features)
        run: cargo build --all --release --target=${{ matrix.target }}
--- a/.github/workflows/dco.yaml
+++ b/.github/workflows/dco.yaml
@@ -0,0 +1,18 @@
+name: DCO
+on:
+  pull_request:
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.x
+      uses: actions/setup-python@v1
+      with:
+        python-version: '3.x'
+    - name: Check DCO
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: |
+        pip3 install -U dco-check
+        dco-check -e "49699333+dependabot[bot]@users.noreply.github.com"
--- a/.github/workflows/docker-image.yaml
+++ b/.github/workflows/docker-image.yaml
@@ -1,8 +1,10 @@
-name: Cloud-Hypervisor's Docker image update
+name: Cloud Hypervisor's Docker image update

 on:
  push:
-    branches: master
+    branches: main
+    paths: resources/Dockerfile
+  pull_request:
    paths: resources/Dockerfile

 jobs:
@@ -19,12 +21,14 @@ jobs:
        uses: docker/setup-buildx-action@v1

      - name: Login to DockerHub
+        if: ${{ github.event_name == 'push' }}
        uses: docker/login-action@v1 
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Build and push
+        if: ${{ github.event_name == 'push' }}
        uses: docker/build-push-action@v2
        with:
          file: ./resources/Dockerfile
@@ -32,5 +36,13 @@ jobs:
          push: true
          tags: cloudhypervisor/dev:latest

+      - name: Build only
+        if: ${{ github.event_name == 'pull_request' }}
+        uses: docker/build-push-action@v2
+        with:
+          file: ./resources/Dockerfile
+          platforms: linux/amd64,linux/arm64
+          tags: cloudhypervisor/dev:latest
+
      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}
--- a/.github/workflows/fuzz-build.yaml
+++ b/.github/workflows/fuzz-build.yaml
@@ -22,6 +22,8 @@ jobs:
            target: ${{ matrix.target }}
            override: true
      - name: Install Cargo fuzz
-        run: cargo install -f cargo-fuzz
+        # Temporary fix for cargo-fuzz on latest nightly: https://github.com/rust-fuzz/cargo-fuzz/issues/276
+        #run: cargo install cargo-fuzz
+        run: cargo install --git https://github.com/rust-fuzz/cargo-fuzz --rev b4df3e58f767b5cad8d1aa6753961003f56f3609
      - name: Cargo Fuzz Build
        run: cargo fuzz build
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -9,6 +9,8 @@ jobs:
    steps:
      - name: Code checkout
        uses: actions/checkout@v2
+      - name: Create release directory
+        run: rsync -rv --exclude=.git . ../cloud-hypervisor-${{ github.event.ref }}
      - name: Install Rust toolchain (x86_64-unknown-linux-gnu)
        uses: actions-rs/toolchain@v1
        with:
@@ -25,6 +27,25 @@ jobs:
        run: cargo build --all --release --target=x86_64-unknown-linux-musl
      - name: Strip cloud-hypervisor binaries
        run: strip target/*/release/cloud-hypervisor
+      - name: Install Rust toolchain (aarch64-unknown-linux-musl)
+        uses: actions-rs/toolchain@v1
+        with:
+            toolchain: stable
+            target: aarch64-unknown-linux-musl
+            override: true
+      - name: Static Build (AArch64)
+        uses: actions-rs/cargo@v1
+        with:
+            use-cross: true
+            command: build
+            args: --all --release --target=aarch64-unknown-linux-musl
+      - name: Vendor
+        working-directory: ../cloud-hypervisor-${{ github.event.ref }}
+        run: |
+          mkdir ../vendor-cargo-home
+          export CARGO_HOME=$(realpath ../vendor-cargo-home)
+          mkdir .cargo
+          cargo vendor > .cargo/config.toml
      - name: Create Release
        id: create_release
        uses: actions/create-release@v1
@@ -35,6 +56,19 @@ jobs:
          release_name: ${{ github.ref }}
          draft: true
          prerelease: true
+      - name: Create vendored source archive
+        working-directory: ../
+        run:  tar cJf cloud-hypervisor-${{ github.event.ref }}.tar.xz cloud-hypervisor-${{ github.event.ref }}
+      - name: Upload cloud-hypervisor vendored source archive
+        id: upload-release-cloud-hypervisor-vendored-sources
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ../cloud-hypervisor-${{ github.event.ref }}.tar.xz
+          asset_name: cloud-hypervisor-${{ github.event.ref }}.tar.xz
+          asset_content_type: application/x-xz
      - name: Upload cloud-hypervisor
        id: upload-release-cloud-hypervisor
        uses: actions/upload-release-asset@v1
@@ -65,3 +99,23 @@ jobs:
          asset_path: target/x86_64-unknown-linux-gnu/release/ch-remote
          asset_name: ch-remote
          asset_content_type: application/octet-stream
+      - name: Upload static AArch64 cloud-hypervisor
+        id: upload-release-static-aarch64-cloud-hypervisor
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: target/aarch64-unknown-linux-musl/release/cloud-hypervisor
+          asset_name: cloud-hypervisor-static-aarch64
+          asset_content_type: application/octet-stream
+      - name: Upload static AArch64 ch-remote
+        id: upload-release-static-aarch64-ch-remote
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: target/aarch64-unknown-linux-musl/release/ch-remote
+          asset_name: ch-remote-static-aarch64
+          asset_content_type: application/octet-stream
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,13 @@
 # Contributing to Cloud Hypervisor

-Cloud Hypervisor is an open source project licensed under the [Apache v2 License](https://opensource.org/licenses/Apache-2.0) and the [BSD 3 Clause](https://opensource.org/licenses/BSD-3-Clause) license.
+Cloud Hypervisor is an open source project licensed under the [Apache v2
+License](https://opensource.org/licenses/Apache-2.0) and the [BSD 3
+Clause](https://opensource.org/licenses/BSD-3-Clause) license. Contributions
+can be made under either license or both. Individual files contain details of
+their licensing and changes to that file are under the same license unless the
+contribution changes the license of the file. When importing code from a third
+party project (e.g. Firecracker or CrosVM) please respect the license of those
+projects.

 ## Coding Style

@@ -55,7 +62,7 @@ you want to merge your changes to `cloud-hypervisor`:
   into your github organization.
 2. Within your fork, create a branch for your contribution.
 3. [Create a pull request](https://help.github.com/articles/creating-a-pull-request-from-a-fork/)
-   against the master branch of the Cloud Hypervisor repository.
+   against the main branch of the Cloud Hypervisor repository.
 4. Add reviewers to your pull request and then work with your reviewers to address
   any comments and obtain minimum of 2 [maintainers](MAINTAINERS.md) approvals.
   To update your pull request amend existing commits whenever applicable and
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -11,9 +11,9 @@ dependencies = [

 [[package]]
 name = "addr2line"
-version = "0.15.2"
+version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7a2e47a1fbe209ee101dd6d61285226744c6c8d3c21c8dc878ba6cb9f467f3a"
+checksum = "b9ecd88a8c8378ca913a680cd98f0f13ac67383d35993f86c90a70e3f137816b"
 dependencies = [
 "gimli",
 ]
@@ -35,18 +35,18 @@ dependencies = [

 [[package]]
 name = "ansi_term"
-version = "0.11.0"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
 dependencies = [
 "winapi",
 ]

 [[package]]
 name = "anyhow"
-version = "1.0.42"
+version = "1.0.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "595d3cfa7a60d4555cb5067b99f07142a08ea778de5cf993f7b75c7d8fabc486"
+checksum = "8b26702f315f53b6071259e15dd9d64528213b44d61de1ec926eca7715d62203"

 [[package]]
 name = "api_client"
@@ -57,9 +57,9 @@ dependencies = [

 [[package]]
 name = "arc-swap"
-version = "1.3.0"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e906254e445520903e7fc9da4f709886c84ae4bc4ddaf0e093188d66df4dc820"
+checksum = "c5d78ce20460b82d3fa150275ed9d55e21064fc7951177baacf86a145c4a4b1f"

 [[package]]
 name = "arch"
@@ -74,6 +74,7 @@ dependencies = [
 "linux-loader",
 "log",
 "serde",
+ "serde_derive",
 "thiserror",
 "versionize",
 "versionize_derive",
@@ -102,13 +103,13 @@ checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"

 [[package]]
 name = "backtrace"
-version = "0.3.60"
+version = "0.3.63"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7815ea54e4d821e791162e078acbebfd6d8c8939cd559c9335dceb1c8ca7282"
+checksum = "321629d8ba6513061f26707241fa9bc89524ff1cd7a915a97ef0c62c666ce1b6"
 dependencies = [
 "addr2line",
 "cc",
- "cfg-if 1.0.0",
+ "cfg-if",
 "libc",
 "miniz_oxide",
 "object",
@@ -126,9 +127,9 @@ dependencies = [

 [[package]]
 name = "bitflags"
-version = "1.2.1"
+version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"

 [[package]]
 name = "block_util"
@@ -141,7 +142,9 @@ dependencies = [
 "thiserror",
 "versionize",
 "versionize_derive",
+ "vhdx",
 "virtio-bindings",
+ "virtio-queue",
 "vm-memory",
 "vm-virtio",
 "vmm-sys-util",
@@ -155,15 +158,9 @@ checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"

 [[package]]
 name = "cc"
-version = "1.0.69"
+version = "1.0.72"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e70cc2f62c6ce1868963827bd677764c62d07c3d9a3e1fb1177ee1a9ab199eb2"
-
-[[package]]
-name = "cfg-if"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+checksum = "22a9137b95ea06864e018375b72adfb7db6e6f68cfc8df5a04d00288050485ee"

 [[package]]
 name = "cfg-if"
@@ -173,9 +170,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"

 [[package]]
 name = "clap"
-version = "2.33.3"
+version = "2.34.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37e58ac78573c40708d45522f0d80fa2f01cc4f9b4e2bf749807255454312002"
+checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
 dependencies = [
 "ansi_term",
 "atty",
@@ -189,13 +186,13 @@ dependencies = [

 [[package]]
 name = "cloud-hypervisor"
-version = "17.0.0"
+version = "20.0.0"
 dependencies = [
 "anyhow",
 "api_client",
 "clap",
 "credibility",
- "dirs",
+ "dirs 4.0.0",
 "epoll",
 "event_monitor",
 "hypervisor",
@@ -204,7 +201,7 @@ dependencies = [
 "log",
 "net_util",
 "option_parser",
- "seccomp",
+ "seccompiler",
 "serde_json",
 "signal-hook",
 "test_infra",
@@ -216,12 +213,12 @@ dependencies = [
 ]

 [[package]]
-name = "cloudabi"
-version = "0.0.3"
+name = "crc32c"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
+checksum = "210cdf933e6a81212bfabf90cd8762f471b5922e5f6b709547673ad8e04b9448"
 dependencies = [
- "bitflags",
+ "rustc_version",
 ]

 [[package]]
@@ -269,6 +266,15 @@ dependencies = [
 "dirs-sys",
 ]

+[[package]]
+name = "dirs"
+version = "4.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca3aa72a6f96ea37bbc5aa912f6788242832f75369bdfdadcb0e38423f100059"
+dependencies = [
+ "dirs-sys",
+]
+
 [[package]]
 name = "dirs-sys"
 version = "0.3.6"
@@ -347,16 +353,16 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7fcd999463524c52659517fe2cea98493cfe485d10565e7b0fb07dbba7ad2753"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
 "libc",
 "wasi",
 ]

 [[package]]
 name = "gimli"
-version = "0.24.0"
+version = "0.26.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e4075386626662786ddb0ec9081e7c7eeb1ba31951f447ca780ef9f5d568189"
+checksum = "78cc372d058dcf6d5ecd98510e7fbc9e5aec4d21de70f65fea8fecebcd881bd4"

 [[package]]
 name = "glob"
@@ -403,19 +409,28 @@ dependencies = [

 [[package]]
 name = "iced-x86"
-version = "1.13.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94ef7eabb0e712d4f12aea976b2deb876739dc70fd787df3876c75c9b7bcf0be"
+checksum = "46e977036f7f5139d580c7f19ad62df9cb8ebd8410bb569e73585226be80a86f"
 dependencies = [
 "lazy_static",
 "static_assertions",
 ]

 [[package]]
-name = "io-uring"
-version = "0.5.1"
+name = "instant"
+version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb82832e05cc4ca298f198a8db108837b4f7b7b1248e3cba8e48f151aece80cf"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "io-uring"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d75829ed9377bab6c90039fe47b9d84caceb4b5063266142e21bcce6550cda8"
 dependencies = [
 "bitflags",
 "libc",
@@ -432,14 +447,14 @@ dependencies = [

 [[package]]
 name = "itoa"
-version = "0.4.7"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd25036021b0de88a0aff6b850051563c6516d0bf53f8638938edbb9de732736"
+checksum = "b71991ff56294aa922b450139ee08b3bfc70982c6b2c7562771375cf73542dd4"

 [[package]]
 name = "kvm-bindings"
-version = "0.4.0"
-source = "git+https://github.com/cloud-hypervisor/kvm-bindings?branch=ch-v0.4.0#1a68725639283e622f4bb64584885b30bfe8be44"
+version = "0.5.0"
+source = "git+https://github.com/cloud-hypervisor/kvm-bindings?branch=ch-v0.5.0#9c497710ba9968d8efe15dbae03991b16cf82e23"
 dependencies = [
 "serde",
 "serde_derive",
@@ -448,9 +463,9 @@ dependencies = [

 [[package]]
 name = "kvm-ioctls"
-version = "0.9.0"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2924454e22895c738e43331ae310459c74a11ded9c97dc250129ee10d2f9ca2"
+checksum = "97422ba48d7ffb66fd4d18130f72ab66f9bbbf791fb7a87b9291cdcfec437593"
 dependencies = [
 "kvm-bindings",
 "libc",
@@ -465,15 +480,15 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"

 [[package]]
 name = "libc"
-version = "0.2.98"
+version = "0.2.108"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "320cfe77175da3a483efed4bc0adc1968ca050b098ce4f2f1c13a56626128790"
+checksum = "8521a1b57e76b1ec69af7599e75e38e7b7fad6610f037db8c79b127201b5d119"

 [[package]]
 name = "libssh2-sys"
-version = "0.2.21"
+version = "0.2.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e0186af0d8f171ae6b9c4c90ec51898bad5d08a2d5e470903a50d9ad8959cbee"
+checksum = "b094a36eb4b8b8c8a7b4b8ae43b2944502be3e59cd87687595cf6b0a71b3f4ca"
 dependencies = [
 "cc",
 "libc",
@@ -497,18 +512,18 @@ dependencies = [

 [[package]]
 name = "linux-loader"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c819cc8275b0f2c1ed9feec455ca288b45d82932384a6a5f7a86812ee3427459"
+checksum = "8a5e77493808403a6bd56a301a64ea6b9342e36ea845044bf0dfdf56fe52fa08"
 dependencies = [
 "vm-memory",
 ]

 [[package]]
 name = "lock_api"
-version = "0.3.4"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4da24a77a3d8a6d4862d95f72e6fdb9c09a643ecdb402d754004a557f2bec75"
+checksum = "712a4d093c9976e24e7dbca41db895dabcbac38eb5f4045393d17a95bdfb1109"
 dependencies = [
 "scopeguard",
 ]
@@ -519,19 +534,19 @@ version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
 ]

 [[package]]
 name = "memchr"
-version = "2.4.0"
+version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b16bd47d9e329435e309c58469fe0791c2d0d1ba96ec0954152a5ae2b04387dc"
+checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"

 [[package]]
 name = "micro_http"
 version = "0.1.0"
-source = "git+https://github.com/firecracker-microvm/micro-http?branch=main#9517a300370a158a7af0996b7eebf040d171e1a4"
+source = "git+https://github.com/firecracker-microvm/micro-http?branch=main#0a58eb1ece68e326e68365c4297d0a7c08ecd9bc"
 dependencies = [
 "libc",
 "vmm-sys-util",
@@ -550,7 +565,7 @@ dependencies = [
 [[package]]
 name = "mshv-bindings"
 version = "0.1.0"
-source = "git+https://github.com/cloud-hypervisor/mshv?branch=master#9481c711c329e1e004eb13dc3f1df946316afda0"
+source = "git+https://github.com/rust-vmm/mshv?branch=main#8770516859e7d05193c496b77ac5ddad3ca5943a"
 dependencies = [
 "libc",
 "serde",
@@ -562,7 +577,7 @@ dependencies = [
 [[package]]
 name = "mshv-ioctls"
 version = "0.1.0"
-source = "git+https://github.com/cloud-hypervisor/mshv?branch=master#9481c711c329e1e004eb13dc3f1df946316afda0"
+source = "git+https://github.com/rust-vmm/mshv?branch=main#8770516859e7d05193c496b77ac5ddad3ca5943a"
 dependencies = [
 "libc",
 "mshv-bindings",
@@ -581,6 +596,7 @@ name = "net_util"
 version = "0.1.0"
 dependencies = [
 "epoll",
+ "getrandom",
 "lazy_static",
 "libc",
 "log",
@@ -592,6 +608,7 @@ dependencies = [
 "versionize",
 "versionize_derive",
 "virtio-bindings",
+ "virtio-queue",
 "vm-memory",
 "vm-virtio",
 "vmm-sys-util",
@@ -599,18 +616,18 @@ dependencies = [

 [[package]]
 name = "object"
-version = "0.25.3"
+version = "0.27.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a38f2be3697a57b4060074ff41b44c16870d916ad7877c17696e063257482bc7"
+checksum = "67ac1d3f9a1d3616fd9a60c8d74296f22406a238b6a72f5cc1e6f314df4ffbf9"
 dependencies = [
 "memchr",
 ]

 [[package]]
 name = "openssl-sys"
-version = "0.9.65"
+version = "0.9.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a7907e3bfa08bb85105209cdfcb6c63d109f8f6c1ed6ca318fff5c1853fbc1d"
+checksum = "7df13d165e607909b363a4757a6f133f8a818a74e9d3a98d09c6128e15fa4c73"
 dependencies = [
 "autocfg",
 "cc",
@@ -625,24 +642,25 @@ version = "0.1.0"

 [[package]]
 name = "parking_lot"
-version = "0.10.2"
+version = "0.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3a704eb390aafdc107b0e392f56a82b668e3a71366993b5340f5833fd62505e"
+checksum = "7d17b78036a60663b797adeaee46f5c9dfebb86948d1255007a1d6be0271ff99"
 dependencies = [
+ "instant",
 "lock_api",
 "parking_lot_core",
 ]

 [[package]]
 name = "parking_lot_core"
-version = "0.7.2"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d58c7c768d4ba344e3e8d72518ac13e259d7c7ade24167003b8488e10b6740a3"
+checksum = "d76e8e1493bcac0d2766c42737f34458f1c8c50c0d23bcb24ea953affb273216"
 dependencies = [
- "cfg-if 0.1.10",
- "cloudabi",
+ "cfg-if",
+ "instant",
 "libc",
- "redox_syscall 0.1.57",
+ "redox_syscall",
 "smallvec",
 "winapi",
 ]
@@ -656,10 +674,12 @@ dependencies = [
 "hypervisor",
 "libc",
 "log",
+ "thiserror",
 "versionize",
 "versionize_derive",
 "vfio-bindings",
 "vfio-ioctls",
+ "vfio_user",
 "vm-allocator",
 "vm-device",
 "vm-memory",
@@ -669,9 +689,9 @@ dependencies = [

 [[package]]
 name = "pkg-config"
-version = "0.3.19"
+version = "0.3.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3831453b3449ceb48b6d9c7ad7c96d5ea673e9b470a1dc578c2ce6521230884c"
+checksum = "12295df4f294471248581bc09bef3c38a5e46f1e36d6a37353621a0c6c357e1f"

 [[package]]
 name = "pnet"
@@ -763,9 +783,9 @@ dependencies = [

 [[package]]
 name = "proc-macro2"
-version = "1.0.27"
+version = "1.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0d8caf72986c1a598726adc988bb5984792ef84f5ee5aa50209145ee8077038"
+checksum = "ba508cc11742c0dc5c1659771673afbab7a0efab23aa17e854cbab0837ed0b43"
 dependencies = [
 "unicode-xid",
 ]
@@ -783,9 +803,9 @@ dependencies = [

 [[package]]
 name = "quote"
-version = "1.0.9"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3d0b9745dc2debf507c8422de05d7226cc1f0644216dfdfead988f9b1ab32a7"
+checksum = "38bc8cc6a5f2e3655e0899c1b848643b2562f853f114bfec7be120678e3ace05"
 dependencies = [
 "proc-macro2",
 ]
@@ -801,15 +821,9 @@ dependencies = [

 [[package]]
 name = "redox_syscall"
-version = "0.1.57"
+version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
-
-[[package]]
-name = "redox_syscall"
-version = "0.2.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "742739e41cd49414de871ea5e549afb7e2a3ac77b589bcbebe8c82fab37147fc"
+checksum = "8383f39639269cde97d255a32bdb68c047337295414940c68bdd30c2e13203ff"
 dependencies = [
 "bitflags",
 ]
@@ -821,7 +835,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "528532f3d801c87aec9def2add9ca802fe569e44a544afe633765267840abe64"
 dependencies = [
 "getrandom",
- "redox_syscall 0.2.8",
+ "redox_syscall",
 ]

 [[package]]
@@ -854,15 +868,24 @@ dependencies = [

 [[package]]
 name = "rustc-demangle"
-version = "0.1.20"
+version = "0.1.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dead70b0b5e03e9c814bcb6b01e03e68f7c57a80aa48c72ec92152ab3e818d49"
+checksum = "7ef03e0a2b150c7a90d01faf6254c9c48a41e95fb2a8c2ac1c6f0d2b9aefc342"
+
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+dependencies = [
+ "semver",
+]

 [[package]]
 name = "ryu"
-version = "1.0.5"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
+checksum = "3c9613b5a66ab9ba26415184cfc41156594925a9cf3a2057e57f31ff145f6568"

 [[package]]
 name = "scopeguard"
@@ -871,24 +894,40 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"

 [[package]]
-name = "seccomp"
-version = "0.1.0"
-source = "git+https://github.com/firecracker-microvm/firecracker?tag=v0.24.4#8f44986a0e956a77f2b2324c12f73bec16130c82"
+name = "seccompiler"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e01d1292a1131b22ccea49f30bd106f1238b5ddeec1a98d39268dcc31d540e68"
 dependencies = [
 "libc",
 ]

 [[package]]
-name = "serde"
-version = "1.0.126"
+name = "semver"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec7505abeacaec74ae4778d9d9328fe5a5d04253220a85c4ee022239fc996d03"
+checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+dependencies = [
+ "semver-parser",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+
+[[package]]
+name = "serde"
+version = "1.0.130"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f12d06de37cf59146fbdecab66aa99f9fe4f78722e3607577a5375d66bd0c913"

 [[package]]
 name = "serde_derive"
-version = "1.0.126"
+version = "1.0.130"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "963a7dbc9895aeac7ac90e74f34a5d5261828f79df35cbed41e10189d3804d43"
+checksum = "d7bc1a1ab1961464eae040d96713baa5a724a8152c1222492465b54322ec508b"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -897,9 +936,9 @@ dependencies = [

 [[package]]
 name = "serde_json"
-version = "1.0.64"
+version = "1.0.72"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "799e97dc9fdae36a5c8b8f2cae9ce2ee9fdce2058c57a93e6099d919fd982f79"
+checksum = "d0ffa0837f2dfa6fb90868c2b5468cad482e175f7dad97e7421951e663f2b527"
 dependencies = [
 "itoa",
 "ryu",
@@ -908,9 +947,9 @@ dependencies = [

 [[package]]
 name = "signal-hook"
-version = "0.3.9"
+version = "0.3.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "470c5a6397076fae0094aaf06a08e6ba6f37acb77d3b1b91ea92b4d6c8650c39"
+checksum = "9c98891d737e271a2954825ef19e46bd16bdb98e2746f2eec4f7a4ef7946efd1"
 dependencies = [
 "libc",
 "signal-hook-registry",
@@ -927,15 +966,15 @@ dependencies = [

 [[package]]
 name = "smallvec"
-version = "1.6.1"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe0f37c9e8f3c5a4a66ad655a93c74daac4ad00c441533bf5c6e7990bb42604e"
+checksum = "1ecab6c735a6bb4139c0caafd0cc3635748bbb3acf4550e8138122099251f309"

 [[package]]
 name = "ssh2"
-version = "0.9.1"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d876d4d57f6bbf2245d43f7ec53759461f801a446d3693704aa6d27b257844d7"
+checksum = "269343e64430067a14937ae0e3c4ec604c178fb896dde0964b1acd22b3e2eeb1"
 dependencies = [
 "bitflags",
 "libc",
@@ -957,9 +996,9 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"

 [[package]]
 name = "syn"
-version = "1.0.74"
+version = "1.0.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1873d832550d4588c3dbc20f01361ab00bfe741048f71e3fecf145a7cc18b29c"
+checksum = "8daf5dd0bb60cbd4137b1b587d2fc0ae729bc07cf01cd70b36a1ed5ade3b9d59"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -968,9 +1007,9 @@ dependencies = [

 [[package]]
 name = "synstructure"
-version = "0.12.5"
+version = "0.12.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "474aaa926faa1603c40b7885a9eaea29b444d1cb2850cb7c0e37bb1a4182f4fa"
+checksum = "f36bdaa60a83aca3921b5259d5400cbf5e90fc51931376a9bd4a0eb79aa7210f"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -1001,7 +1040,7 @@ dependencies = [
 name = "test_infra"
 version = "0.1.0"
 dependencies = [
- "dirs",
+ "dirs 3.0.2",
 "epoll",
 "libc",
 "ssh2",
@@ -1021,18 +1060,18 @@ dependencies = [

 [[package]]
 name = "thiserror"
-version = "1.0.26"
+version = "1.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93119e4feac1cbe6c798c34d3a53ea0026b0b1de6a120deef895137c0529bfe2"
+checksum = "854babe52e4df1653706b98fcfc05843010039b406875930a70e4d9644e5c417"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "1.0.26"
+version = "1.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "060d69a0afe7796bf42e9e2ff91f5ee691fb15c53d38b4b62a9a53eb23164745"
+checksum = "aa32fd3f627f367fe16f893e2597ae3c05020f8bba2666a4e6ea73d377e5714b"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -1041,9 +1080,9 @@ dependencies = [

 [[package]]
 name = "unicode-width"
-version = "0.1.8"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
+checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"

 [[package]]
 name = "unicode-xid"
@@ -1056,6 +1095,9 @@ name = "uuid"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bc5cf98d8186244414c848017f0e2676b3fcb46807f6668a97dfe67359a3c4b7"
+dependencies = [
+ "getrandom",
+]

 [[package]]
 name = "vcpkg"
@@ -1108,24 +1150,60 @@ dependencies = [
 [[package]]
 name = "vfio-ioctls"
 version = "0.1.0"
-source = "git+https://github.com/rust-vmm/vfio-ioctls?branch=master#9b84069e9f419c5369b9a313859cac7e9828d331"
+source = "git+https://github.com/rust-vmm/vfio-ioctls?branch=main#19e5b83ddfad430109ce3e8d51f4a24796099127"
 dependencies = [
 "byteorder",
 "kvm-bindings",
 "kvm-ioctls",
+ "libc",
 "log",
+ "mshv-bindings",
+ "mshv-ioctls",
+ "thiserror",
 "vfio-bindings",
 "vm-memory",
 "vmm-sys-util",
 ]

 [[package]]
-name = "vhost"
+name = "vfio_user"
 version = "0.1.0"
-source = "git+https://github.com/rust-vmm/vhost?branch=master#99fbfc969287ea87398d3755bd2613c14d77579f"
+dependencies = [
+ "anyhow",
+ "libc",
+ "log",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "thiserror",
+ "vfio-bindings",
+ "vm-memory",
+ "vmm-sys-util",
+]
+
+[[package]]
+name = "vhdx"
+version = "0.1.0"
+dependencies = [
+ "byteorder",
+ "crc32c",
+ "libc",
+ "log",
+ "remain",
+ "thiserror",
+ "uuid",
+ "vmm-sys-util",
+]
+
+[[package]]
+name = "vhost"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d23ddeb452fb4f837526c6298cc8a2f4948e5595b0328a3d61b5eebe51874d7"
 dependencies = [
 "bitflags",
 "libc",
+ "vm-memory",
 "vmm-sys-util",
 ]

@@ -1138,6 +1216,7 @@ dependencies = [
 "log",
 "vhost",
 "virtio-bindings",
+ "virtio-queue",
 "vm-memory",
 "vm-virtio",
 "vmm-sys-util",
@@ -1149,6 +1228,7 @@ version = "0.1.0"
 dependencies = [
 "block_util",
 "clap",
+ "env_logger",
 "epoll",
 "libc",
 "log",
@@ -1166,6 +1246,7 @@ name = "vhost_user_net"
 version = "0.1.0"
 dependencies = [
 "clap",
+ "env_logger",
 "epoll",
 "libc",
 "log",
@@ -1201,7 +1282,7 @@ dependencies = [
 "net_util",
 "pci",
 "rate_limiter",
- "seccomp",
+ "seccompiler",
 "serde",
 "serde_derive",
 "serde_json",
@@ -1209,6 +1290,7 @@ dependencies = [
 "versionize_derive",
 "vhost",
 "virtio-bindings",
+ "virtio-queue",
 "vm-allocator",
 "vm-device",
 "vm-memory",
@@ -1217,6 +1299,15 @@ dependencies = [
 "vmm-sys-util",
 ]

+[[package]]
+name = "virtio-queue"
+version = "0.1.0"
+dependencies = [
+ "log",
+ "vm-memory",
+ "vmm-sys-util",
+]
+
 [[package]]
 name = "vm-allocator"
 version = "0.1.0"
@@ -1242,13 +1333,14 @@ dependencies = [

 [[package]]
 name = "vm-fdt"
-version = "0.1.0"
-source = "git+https://github.com/rust-vmm/vm-fdt?branch=master#3c05f2dc84e7c0849c332969f831bdde329d55aa"
+version = "0.2.0"
+source = "git+https://github.com/rust-vmm/vm-fdt?branch=main#9cfa0c8d7c3032f79589c7b01c8722a37f4cf44f"

 [[package]]
 name = "vm-memory"
-version = "0.5.0"
-source = "git+https://github.com/rust-vmm/vm-memory?rev=5bd7138758183a73ac0da27ce40c004d95f1a7e9#5bd7138758183a73ac0da27ce40c004d95f1a7e9"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a8ebcb86ca457f9d6e14cf97009f679952eba42f0113de5db596e514cd0e43b"
 dependencies = [
 "arc-swap",
 "libc",
@@ -1275,6 +1367,7 @@ version = "0.1.0"
 dependencies = [
 "log",
 "virtio-bindings",
+ "virtio-queue",
 "vm-memory",
 ]

@@ -1303,7 +1396,7 @@ dependencies = [
 "option_parser",
 "pci",
 "qcow",
- "seccomp",
+ "seccompiler",
 "serde",
 "serde_derive",
 "serde_json",
@@ -1313,7 +1406,10 @@ dependencies = [
 "versionize",
 "versionize_derive",
 "vfio-ioctls",
+ "vfio_user",
+ "vhdx",
 "virtio-devices",
+ "virtio-queue",
 "vm-allocator",
 "vm-device",
 "vm-memory",
@@ -1324,9 +1420,9 @@ dependencies = [

 [[package]]
 name = "vmm-sys-util"
-version = "0.8.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01cf11afbc4ebc0d5c7a7748a77d19e2042677fc15faa2f4ccccb27c18a60605"
+checksum = "733537bded03aaa93543f785ae997727b30d1d9f4a03b7861d23290474242e11"
 dependencies = [
 "bitflags",
 "libc",
@@ -1382,9 +1478,9 @@ checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

 [[package]]
 name = "zerocopy"
-version = "0.3.0"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6580539ad917b7c026220c4b3f2c08d52ce54d6ce0dc491e66002e35388fab46"
+checksum = "332f188cc1bcf1fe1064b8c58d150f497e697f49774aa846f2dc949d9a25f236"
 dependencies = [
 "byteorder",
 "zerocopy-derive",
@@ -1392,9 +1488,9 @@ dependencies = [

 [[package]]
 name = "zerocopy-derive"
-version = "0.2.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d498dbd1fd7beb83c86709ae1c33ca50942889473473d287d56ce4770a18edfb"
+checksum = "a0fbc82b82efe24da867ee52e015e58178684bd9dd64c34e66bdf21da2582a9f"
 dependencies = [
 "proc-macro2",
 "syn",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cloud-hypervisor"
-version = "17.0.0"
+version = "20.0.0"
 authors = ["The Cloud Hypervisor Authors"]
 edition = "2018"
 default-run = "cloud-hypervisor"
@@ -13,43 +13,42 @@ homepage = "https://github.com/cloud-hypervisor/cloud-hypervisor"
 lto = true

 [dependencies]
-anyhow = "1.0.42"
+anyhow = "1.0.51"
 api_client = { path = "api_client" }
-clap = { version = "2.33.3", features = ["wrap_help"] }
+clap = { version = "2.34.0", features = ["wrap_help"] }
 epoll = "4.3.1"
 event_monitor = { path = "event_monitor" }
 hypervisor = { path = "hypervisor" }
-libc = "0.2.98"
+libc = "0.2.108"
 log = { version = "0.4.14", features = ["std"] }
 option_parser = { path = "option_parser" }
-seccomp = { git = "https://github.com/firecracker-microvm/firecracker", tag = "v0.24.4" }
-serde_json = "1.0.64"
-signal-hook = "0.3.9"
-thiserror = "1.0.26"
+seccompiler = "0.2.0"
+serde_json = "1.0.72"
+signal-hook = "0.3.10"
+thiserror = "1.0.30"
 vmm = { path = "vmm" }
-vmm-sys-util = "0.8.0"
-vm-memory = "0.5.0"
+vmm-sys-util = "0.9.0"
+vm-memory = "0.6.0"

 [build-dependencies]
-clap = { version = "2.33.3", features = ["wrap_help"] }
+clap = { version = "2.34.0", features = ["wrap_help"] }

 # List of patched crates
 [patch.crates-io]
-kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch-v0.4.0", features = ["with-serde", "fam-wrappers"] }
+kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch-v0.5.0", features = ["with-serde", "fam-wrappers"] }
 versionize_derive = { git = "https://github.com/cloud-hypervisor/versionize_derive", branch = "ch" }
-vm-memory = { git = "https://github.com/rust-vmm/vm-memory", rev = "5bd7138758183a73ac0da27ce40c004d95f1a7e9"}

 [dev-dependencies]
 credibility = "0.1.3"
-dirs = "3.0.2"
+dirs = "4.0.0"
 lazy_static= "1.4.0"
 net_util = { path = "net_util" }
-serde_json = "1.0.64"
+serde_json = "1.0.72"
 test_infra = { path = "test_infra" }
 wait-timeout = "0.2.0"

 [features]
-default = ["acpi", "cmos", "io_uring", "kvm"]
+default = ["common", "kvm"]
 # Common features for all hypervisors
 common = ["acpi", "cmos", "fwdebug", "io_uring"]
 acpi = ["vmm/acpi"]
@@ -78,10 +77,13 @@ members = [
    "pci",
    "qcow",
    "rate_limiter",
+    "vfio_user",
+    "vhdx",
    "vhost_user_backend",
    "vhost_user_block",
    "vhost_user_net",
    "virtio-devices",
+    "virtio-queue",
    "vmm",
    "vm-allocator",
    "vm-device",
--- a/44
+++ b/44
@@ -2,7 +2,7 @@ pipeline{
 	agent none
 	stages {
 		stage ('Early checks') {
-			agent { node { label 'master' } }
+			agent { node { label 'built-in' } }
 			stages {
 				stage ('Check for RFC/WIP builds') {
 					when {
@@ -14,7 +14,7 @@ pipeline{
 					}
 				}
 				stage ('Cancel older builds') {
-					when { not { branch 'master' } }
+					when { not { branch 'main' } }
 					steps {
 						cancelPreviousBuilds()
 					}
@@ -110,7 +110,7 @@ pipeline{
 					agent { node { label 'bionic-sgx' } }
 					when {
 						beforeAgent true
-						branch 'master'
+						branch 'main'
 					}
 					stages {
 						stage ('Checkout') {
@@ -146,7 +146,7 @@ pipeline{
 					agent { node { label 'bionic-vfio' } }
 					when {
 						beforeAgent true
-						branch 'master'
+						branch 'main'
 					}
 					stages {
 						stage ('Checkout') {
@@ -215,21 +215,49 @@ pipeline{
 						}
 					}
 				}
+				stage ('Worker build - Live Migration') {
+					agent { node { label 'hirsute-small' } }
+					stages {
+						stage ('Checkout') {
+							steps {
+								checkout scm
+							}
+						}
+						stage ('Run live-migration integration tests') {
+							options {
+								timeout(time: 1, unit: 'HOURS')
+							}
+							steps {
+								sh "sudo modprobe openvswitch"
+								sh "scripts/dev_cli.sh tests --integration-live-migration"
+							}
+						}
+						stage ('Run live-migration integration tests for musl') {
+							options {
+								timeout(time: 1, unit: 'HOURS')
+							}
+							steps {
+								sh "sudo modprobe openvswitch"
+								sh "scripts/dev_cli.sh tests --integration-live-migration --libc musl"
+							}
+						}
+					}
+				}
 			}
 		}
 	}
 	post {
 		regression {
 			script {
-				if (env.BRANCH_NAME == 'master') {
-					slackSend (color: '#ff0000', message: '"master" branch build is now failing')
+				if (env.BRANCH_NAME == 'main') {
+					slackSend (color: '#ff0000', message: '"main" branch build is now failing')
 				}
 			}
 		}
 		fixed {
 			script {
-				if (env.BRANCH_NAME == 'master') {
-					slackSend (color: '#00ff00', message: '"master" branch build is now fixed')
+				if (env.BRANCH_NAME == 'main') {
+					slackSend (color: '#00ff00', message: '"main" branch build is now fixed')
 				}
 			}
 		}
--- a/MAINTAINERS.md
+++ b/MAINTAINERS.md
@@ -1,6 +1,7 @@
 # Maintainers

- Sebastien Boeuf <sebastien.boeuf@intel.com> @sboeuf
- Robert Bradford <robert.bradford@intel.com> @rbradford
- Samuel Ortiz <sameo@linux.intel.com> @sameo
- Chao P Peng <chao.p.peng@linux.intel.com> @chao-p
+- Sebastien Boeuf - @sboeuf
+- Robert Bradford - @rbradford
+- Samuel Ortiz - @sameo
+- Wei Liu - @liuw
+- Michael Zhao - @michael2012z
--- a/README.md
+++ b/README.md
@@ -1,11 +1,10 @@
-[![Build Status](https://travis-ci.com/cloud-hypervisor/cloud-hypervisor.svg?branch=master)](https://travis-ci.com/cloud-hypervisor/cloud-hypervisor)
-
 - [1. What is Cloud Hypervisor?](#1-what-is-cloud-hypervisor)
  - [Objectives](#objectives)
    - [High Level](#high-level)
    - [Architectures](#architectures)
    - [Guest OS](#guest-os)
 - [2. Getting Started](#2-getting-started)
+  - [Install prerequisites](#install-prerequisites)
  - [Clone and build](#clone-and-build)
    - [Containerized builds and tests](#containerized-builds-and-tests)
  - [Run](#run)
@@ -23,6 +22,7 @@
 - [5. Community](#5-community)
  - [Contribute](#contribute)
  - [Join us](#join-us)
+  - [Security issues](#security-issues)

 # 1. What is Cloud Hypervisor?

@@ -58,6 +58,12 @@ Cloud Hypervisor supports `64-bit Linux` and Windows 10/Windows Server 2019.

 # 2. Getting Started

+Below sections describe how to build and run Cloud Hypervisor on the `x86_64`
+platform. For getting started on the `AArch64` platform, please refer to the
+[Arm64 documentation](docs/arm64.md).
+
+## Preparation
+
 We create a folder to build and run `cloud-hypervisor` at `$HOME/cloud-hypervisor`

 ```shell
@@ -149,7 +155,7 @@ We need to get the latest `rust-hypervisor-firmware` release and also a working
 $ pushd $CLOUDH
 $ 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/0.3.1/hypervisor-fw
+$ wget https://github.com/cloud-hypervisor/rust-hypervisor-firmware/releases/download/0.3.2/hypervisor-fw
 $ popd
 ```

@@ -180,7 +186,7 @@ To build the kernel:

 # Clone the Cloud Hypervisor Linux branch
 $ pushd $CLOUDH
-$ git clone --depth 1 https://github.com/cloud-hypervisor/linux.git -b ch-5.13-rc5 linux-cloud-hypervisor
+$ git clone --depth 1 https://github.com/cloud-hypervisor/linux.git -b ch-5.14 linux-cloud-hypervisor
 $ pushd linux-cloud-hypervisor

 # Use the cloud-hypervisor kernel config to build your kernel
--- a/acpi_tables/Cargo.toml
+++ b/acpi_tables/Cargo.toml
@@ -5,4 +5,4 @@ authors = ["The Cloud Hypervisor Authors"]
 edition = "2018"

 [dependencies]
-vm-memory = "0.5.0"
+vm-memory = "0.6.0"
--- a/acpi_tables/src/aml.rs
+++ b/acpi_tables/src/aml.rs
@@ -6,15 +6,23 @@
 use std::marker::PhantomData;

 pub trait Aml {
-    fn to_aml_bytes(&self) -> Vec<u8>;
+    fn append_aml_bytes(&self, _v: &mut Vec<u8>) {
+        unimplemented!()
+    }
+
+    fn to_aml_bytes(&self) -> Vec<u8> {
+        let mut v = Vec::new();
+        self.append_aml_bytes(&mut v);
+        v
+    }
 }

 pub const ZERO: Zero = Zero {};
 pub struct Zero {}

 impl Aml for Zero {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        vec![0u8]
+    fn append_aml_bytes(&self, v: &mut Vec<u8>) {
+        v.push(0u8)
    }
 }

@@ -22,8 +30,8 @@ pub const ONE: One = One {};
 pub struct One {}

 impl Aml for One {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        vec![1u8]
+    fn append_aml_bytes(&self, v: &mut Vec<u8>) {
+        v.push(1u8)
    }
 }

@@ -31,8 +39,8 @@ pub const ONES: Ones = Ones {};
 pub struct Ones {}

 impl Aml for Ones {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        vec![0xffu8]
+    fn append_aml_bytes(&self, v: &mut Vec<u8>) {
+        v.push(0xffu8)
    }
 }

@@ -42,9 +50,7 @@ pub struct Path {
 }

 impl Aml for Path {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
        if self.root {
            bytes.push(b'\\');
        }
@@ -62,10 +68,8 @@ impl Aml for Path {
        };

        for part in self.name_parts.clone().iter_mut() {
-            bytes.append(&mut part.to_vec());
+            bytes.extend_from_slice(&part.to_vec());
        }
-
-        bytes
    }
 }

@@ -94,40 +98,36 @@ impl From<&str> for Path {
 pub type Byte = u8;

 impl Aml for Byte {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x0a]; /* BytePrefix */
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x0a); /* BytePrefix */
        bytes.push(*self);
-        bytes
    }
 }

 pub type Word = u16;

 impl Aml for Word {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x0bu8]; /* WordPrefix */
-        bytes.append(&mut self.to_le_bytes().to_vec());
-        bytes
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x0b); /* WordPrefix */
+        bytes.extend_from_slice(&self.to_le_bytes())
    }
 }

 pub type DWord = u32;

 impl Aml for DWord {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x0c]; /* DWordPrefix */
-        bytes.append(&mut self.to_le_bytes().to_vec());
-        bytes
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x0c); /* DWordPrefix */
+        bytes.extend_from_slice(&self.to_le_bytes())
    }
 }

 pub type QWord = u64;

 impl Aml for QWord {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x0e]; /* QWordPrefix */
-        bytes.append(&mut self.to_le_bytes().to_vec());
-        bytes
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x0e); /* QWordPrefix */
+        bytes.extend_from_slice(&self.to_le_bytes())
    }
 }

@@ -136,16 +136,18 @@ pub struct Name {
 }

 impl Aml for Name {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        self.bytes.clone()
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        // TODO: Refactor this to make more efficient but there are
+        // lifetime/ownership challenges.
+        bytes.extend_from_slice(&self.bytes.clone())
    }
 }

 impl Name {
    pub fn new(path: Path, inner: &dyn Aml) -> Self {
        let mut bytes = vec![0x08]; /* NameOp */
-        bytes.append(&mut path.to_aml_bytes());
-        bytes.append(&mut inner.to_aml_bytes());
+        path.append_aml_bytes(&mut bytes);
+        inner.append_aml_bytes(&mut bytes);
        Name { bytes }
    }
 }
@@ -155,21 +157,17 @@ pub struct Package<'a> {
 }

 impl<'a> Aml for Package<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![self.children.len() as u8];
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        let mut tmp = vec![self.children.len() as u8];
        for child in &self.children {
-            bytes.append(&mut child.to_aml_bytes());
+            child.append_aml_bytes(&mut tmp);
        }

-        let mut pkg_length = create_pkg_length(&bytes, true);
-        pkg_length.reverse();
-        for byte in pkg_length {
-            bytes.insert(0, byte);
-        }
+        let pkg_length = create_pkg_length(&tmp, true);

-        bytes.insert(0, 0x12); /* PackageOp */
-
-        bytes
+        bytes.push(0x12); /* PackageOp */
+        bytes.extend_from_slice(&pkg_length);
+        bytes.extend_from_slice(&tmp);
    }
 }

@@ -257,51 +255,46 @@ impl EisaName {
 }

 impl Aml for EisaName {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        self.value.to_aml_bytes()
-    }
-}
-
-fn create_integer(v: usize) -> Vec<u8> {
-    if v <= u8::max_value().into() {
-        (v as u8).to_aml_bytes()
-    } else if v <= u16::max_value().into() {
-        (v as u16).to_aml_bytes()
-    } else if v <= u32::max_value() as usize {
-        (v as u32).to_aml_bytes()
-    } else {
-        (v as u64).to_aml_bytes()
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        self.value.append_aml_bytes(bytes)
    }
 }

 pub type Usize = usize;

 impl Aml for Usize {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        create_integer(*self)
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        if *self <= u8::max_value().into() {
+            (*self as u8).append_aml_bytes(bytes)
+        } else if *self <= u16::max_value().into() {
+            (*self as u16).append_aml_bytes(bytes)
+        } else if *self <= u32::max_value() as usize {
+            (*self as u32).append_aml_bytes(bytes)
+        } else {
+            (*self as u64).append_aml_bytes(bytes)
+        }
    }
 }

-fn create_aml_string(v: &str) -> Vec<u8> {
-    let mut data = vec![0x0D]; /* String Op */
-    data.extend_from_slice(v.as_bytes());
-    data.push(0x0); /* NullChar */
-    data
+fn append_aml_string(v: &str, bytes: &mut Vec<u8>) {
+    bytes.push(0x0D); /* String Op */
+    bytes.extend_from_slice(v.as_bytes());
+    bytes.push(0x0); /* NullChar */
 }

 pub type AmlStr = &'static str;

 impl Aml for AmlStr {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        create_aml_string(self)
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        append_aml_string(self, bytes)
    }
 }

 pub type AmlString = String;

 impl Aml for AmlString {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        create_aml_string(self)
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        append_aml_string(self, bytes)
    }
 }

@@ -310,36 +303,31 @@ pub struct ResourceTemplate<'a> {
 }

 impl<'a> Aml for ResourceTemplate<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        let mut tmp = Vec::new();
        // Add buffer data
        for child in &self.children {
-            bytes.append(&mut child.to_aml_bytes());
+            child.append_aml_bytes(&mut tmp);
        }

        // Mark with end and mark checksum as as always valid
-        bytes.push(0x79); /* EndTag */
-        bytes.push(0); /* zero checksum byte */
+        tmp.push(0x79); /* EndTag */
+        tmp.push(0); /* zero checksum byte */

        // Buffer length is an encoded integer including buffer data
        // and EndTag and checksum byte
-        let mut buffer_length = bytes.len().to_aml_bytes();
+        let mut buffer_length = tmp.len().to_aml_bytes();
        buffer_length.reverse();
        for byte in buffer_length {
-            bytes.insert(0, byte);
+            tmp.insert(0, byte);
        }

        // PkgLength is everything else
-        let mut pkg_length = create_pkg_length(&bytes, true);
-        pkg_length.reverse();
-        for byte in pkg_length {
-            bytes.insert(0, byte);
-        }
+        let pkg_length = create_pkg_length(&tmp, true);

-        bytes.insert(0, 0x11); /* BufferOp */
-
-        bytes
+        bytes.push(0x11); /* BufferOp */
+        bytes.extend_from_slice(&pkg_length);
+        bytes.extend_from_slice(&tmp);
    }
 }

@@ -366,15 +354,13 @@ impl Memory32Fixed {
 }

 impl Aml for Memory32Fixed {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x86]; /* Memory32Fixed */
-        bytes.append(&mut 9u16.to_le_bytes().to_vec());
-
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x86); /* Memory32Fixed */
+        bytes.extend_from_slice(&9u16.to_le_bytes());
        // 9 bytes of payload
        bytes.push(self.read_write as u8);
-        bytes.append(&mut self.base.to_le_bytes().to_vec());
-        bytes.append(&mut self.length.to_le_bytes().to_vec());
-        bytes
+        bytes.extend_from_slice(&self.base.to_le_bytes());
+        bytes.extend_from_slice(&self.length.to_le_bytes());
    }
 }

@@ -430,7 +416,7 @@ impl<T> AddressSpace<T> {

    fn push_header(&self, bytes: &mut Vec<u8>, descriptor: u8, length: usize) {
        bytes.push(descriptor); /* Word Address Space Descriptor */
-        bytes.append(&mut (length as u16).to_le_bytes().to_vec());
+        bytes.extend_from_slice(&(length as u16).to_le_bytes());
        bytes.push(self.r#type as u8); /* type */
        let generic_flags = 1 << 2 /* Min Fixed */ | 1 << 3; /* Max Fixed */
        bytes.push(generic_flags);
@@ -439,65 +425,53 @@ impl<T> AddressSpace<T> {
 }

 impl Aml for AddressSpace<u16> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
        self.push_header(
-            &mut bytes,
+            bytes,
            0x88,                               /* Word Address Space Descriptor */
            3 + 5 * std::mem::size_of::<u16>(), /* 3 bytes of header + 5 u16 fields */
        );

-        bytes.append(&mut 0u16.to_le_bytes().to_vec()); /* Granularity */
-        bytes.append(&mut self.min.to_le_bytes().to_vec()); /* Min */
-        bytes.append(&mut self.max.to_le_bytes().to_vec()); /* Max */
-        bytes.append(&mut 0u16.to_le_bytes().to_vec()); /* Translation */
+        bytes.extend_from_slice(&0u16.to_le_bytes()); /* Granularity */
+        bytes.extend_from_slice(&self.min.to_le_bytes()); /* Min */
+        bytes.extend_from_slice(&self.max.to_le_bytes()); /* Max */
+        bytes.extend_from_slice(&0u16.to_le_bytes()); /* Translation */
        let len = self.max - self.min + 1;
-        bytes.append(&mut len.to_le_bytes().to_vec()); /* Length */
-
-        bytes
+        bytes.extend_from_slice(&len.to_le_bytes()); /* Length */
    }
 }

 impl Aml for AddressSpace<u32> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
        self.push_header(
-            &mut bytes,
+            bytes,
            0x87,                               /* DWord Address Space Descriptor */
            3 + 5 * std::mem::size_of::<u32>(), /* 3 bytes of header + 5 u32 fields */
        );

-        bytes.append(&mut 0u32.to_le_bytes().to_vec()); /* Granularity */
-        bytes.append(&mut self.min.to_le_bytes().to_vec()); /* Min */
-        bytes.append(&mut self.max.to_le_bytes().to_vec()); /* Max */
-        bytes.append(&mut 0u32.to_le_bytes().to_vec()); /* Translation */
+        bytes.extend_from_slice(&0u32.to_le_bytes()); /* Granularity */
+        bytes.extend_from_slice(&self.min.to_le_bytes()); /* Min */
+        bytes.extend_from_slice(&self.max.to_le_bytes()); /* Max */
+        bytes.extend_from_slice(&0u32.to_le_bytes()); /* Translation */
        let len = self.max - self.min + 1;
-        bytes.append(&mut len.to_le_bytes().to_vec()); /* Length */
-
-        bytes
+        bytes.extend_from_slice(&len.to_le_bytes()); /* Length */
    }
 }

 impl Aml for AddressSpace<u64> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
        self.push_header(
-            &mut bytes,
+            bytes,
            0x8A,                               /* QWord Address Space Descriptor */
            3 + 5 * std::mem::size_of::<u64>(), /* 3 bytes of header + 5 u64 fields */
        );

-        bytes.append(&mut 0u64.to_le_bytes().to_vec()); /* Granularity */
-        bytes.append(&mut self.min.to_le_bytes().to_vec()); /* Min */
-        bytes.append(&mut self.max.to_le_bytes().to_vec()); /* Max */
-        bytes.append(&mut 0u64.to_le_bytes().to_vec()); /* Translation */
+        bytes.extend_from_slice(&0u64.to_le_bytes()); /* Granularity */
+        bytes.extend_from_slice(&self.min.to_le_bytes()); /* Min */
+        bytes.extend_from_slice(&self.max.to_le_bytes()); /* Max */
+        bytes.extend_from_slice(&0u64.to_le_bytes()); /* Translation */
        let len = self.max - self.min + 1;
-        bytes.append(&mut len.to_le_bytes().to_vec()); /* Length */
-
-        bytes
+        bytes.extend_from_slice(&len.to_le_bytes()); /* Length */
    }
 }

@@ -520,16 +494,13 @@ impl Io {
 }

 impl Aml for Io {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x47]; /* Io Port Descriptor */
-
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x47); /* Io Port Descriptor */
        bytes.push(1); /* IODecode16 */
-        bytes.append(&mut self.min.to_le_bytes().to_vec());
-        bytes.append(&mut self.max.to_le_bytes().to_vec());
+        bytes.extend_from_slice(&self.min.to_le_bytes());
+        bytes.extend_from_slice(&self.max.to_le_bytes());
        bytes.push(self.alignment);
        bytes.push(self.length);
-
-        bytes
    }
 }

@@ -560,18 +531,16 @@ impl Interrupt {
 }

 impl Aml for Interrupt {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x89]; /* Extended IRQ Descriptor */
-        bytes.append(&mut 6u16.to_le_bytes().to_vec());
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x89); /* Extended IRQ Descriptor */
+        bytes.extend_from_slice(&6u16.to_le_bytes());
        let flags = (self.shared as u8) << 3
            | (self.active_low as u8) << 2
            | (self.edge_triggered as u8) << 1
            | self.consumer as u8;
        bytes.push(flags);
        bytes.push(1u8); /* count */
-        bytes.append(&mut self.number.to_le_bytes().to_vec());
-
-        bytes
+        bytes.extend_from_slice(&self.number.to_le_bytes());
    }
 }

@@ -581,22 +550,20 @@ pub struct Device<'a> {
 }

 impl<'a> Aml for Device<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-        bytes.append(&mut self.path.to_aml_bytes());
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        let mut tmp = Vec::new();
+        self.path.append_aml_bytes(&mut tmp);
+
        for child in &self.children {
-            bytes.append(&mut child.to_aml_bytes());
+            child.append_aml_bytes(&mut tmp);
        }

-        let mut pkg_length = create_pkg_length(&bytes, true);
-        pkg_length.reverse();
-        for byte in pkg_length {
-            bytes.insert(0, byte);
-        }
+        let pkg_length = create_pkg_length(&tmp, true);

-        bytes.insert(0, 0x82); /* DeviceOp */
-        bytes.insert(0, 0x5b); /* ExtOpPrefix */
-        bytes
+        bytes.push(0x5b); /* ExtOpPrefix */
+        bytes.push(0x82); /* DeviceOp */
+        bytes.extend_from_slice(&pkg_length);
+        bytes.extend_from_slice(&tmp);
    }
 }

@@ -612,21 +579,18 @@ pub struct Scope<'a> {
 }

 impl<'a> Aml for Scope<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-        bytes.append(&mut self.path.to_aml_bytes());
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        let mut tmp = Vec::new();
+        self.path.append_aml_bytes(&mut tmp);
        for child in &self.children {
-            bytes.append(&mut child.to_aml_bytes());
+            child.append_aml_bytes(&mut tmp);
        }

-        let mut pkg_length = create_pkg_length(&bytes, true);
-        pkg_length.reverse();
-        for byte in pkg_length {
-            bytes.insert(0, byte);
-        }
+        let pkg_length = create_pkg_length(&tmp, true);

-        bytes.insert(0, 0x10); /* ScopeOp */
-        bytes
+        bytes.push(0x10); /* ScopeOp */
+        bytes.extend_from_slice(&pkg_length);
+        bytes.extend_from_slice(&tmp)
    }
 }

@@ -655,23 +619,20 @@ impl<'a> Method<'a> {
 }

 impl<'a> Aml for Method<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-        bytes.append(&mut self.path.to_aml_bytes());
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        let mut tmp = Vec::new();
+        self.path.append_aml_bytes(&mut tmp);
        let flags: u8 = (self.args & 0x7) | (self.serialized as u8) << 3;
-        bytes.push(flags);
+        tmp.push(flags);
        for child in &self.children {
-            bytes.append(&mut child.to_aml_bytes());
+            child.append_aml_bytes(&mut tmp);
        }

-        let mut pkg_length = create_pkg_length(&bytes, true);
-        pkg_length.reverse();
-        for byte in pkg_length {
-            bytes.insert(0, byte);
-        }
+        let pkg_length = create_pkg_length(&tmp, true);

-        bytes.insert(0, 0x14); /* MethodOp */
-        bytes
+        bytes.push(0x14); /* MethodOp */
+        bytes.extend_from_slice(&pkg_length);
+        bytes.extend_from_slice(&tmp)
    }
 }

@@ -686,10 +647,9 @@ impl<'a> Return<'a> {
 }

 impl<'a> Aml for Return<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0xa4]; /* ReturnOp */
-        bytes.append(&mut self.value.to_aml_bytes());
-        bytes
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0xa4); /* ReturnOp */
+        self.value.append_aml_bytes(bytes);
    }
 }

@@ -740,35 +700,32 @@ impl Field {
 }

 impl Aml for Field {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-        bytes.append(&mut self.path.to_aml_bytes());
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        let mut tmp = Vec::new();
+        self.path.append_aml_bytes(&mut tmp);

        let flags: u8 = self.access_type as u8 | (self.update_rule as u8) << 5;
-        bytes.push(flags);
+        tmp.push(flags);

        for field in self.fields.iter() {
            match field {
                FieldEntry::Named(name, length) => {
-                    bytes.extend_from_slice(name);
-                    bytes.append(&mut create_pkg_length(&vec![0; *length], false));
+                    tmp.extend_from_slice(name);
+                    tmp.extend_from_slice(&create_pkg_length(&vec![0; *length], false));
                }
                FieldEntry::Reserved(length) => {
-                    bytes.push(0x0);
-                    bytes.append(&mut create_pkg_length(&vec![0; *length], false));
+                    tmp.push(0x0);
+                    tmp.extend_from_slice(&create_pkg_length(&vec![0; *length], false));
                }
            }
        }

-        let mut pkg_length = create_pkg_length(&bytes, true);
-        pkg_length.reverse();
-        for byte in pkg_length {
-            bytes.insert(0, byte);
-        }
+        let pkg_length = create_pkg_length(&tmp, true);

-        bytes.insert(0, 0x81); /* FieldOp */
-        bytes.insert(0, 0x5b); /* ExtOpPrefix */
-        bytes
+        bytes.push(0x5b); /* ExtOpPrefix */
+        bytes.push(0x81); /* FieldOp */
+        bytes.extend_from_slice(&pkg_length);
+        bytes.extend_from_slice(&tmp)
    }
 }

@@ -805,15 +762,13 @@ impl OpRegion {
 }

 impl Aml for OpRegion {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-        bytes.append(&mut self.path.to_aml_bytes());
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x5b); /* ExtOpPrefix */
+        bytes.push(0x80); /* OpRegionOp */
+        self.path.append_aml_bytes(bytes);
        bytes.push(self.space as u8);
-        bytes.extend_from_slice(&self.offset.to_aml_bytes()); /* RegionOffset */
-        bytes.extend_from_slice(&self.length.to_aml_bytes()); /* RegionLen */
-        bytes.insert(0, 0x80); /* OpRegionOp */
-        bytes.insert(0, 0x5b); /* ExtOpPrefix */
-        bytes
+        self.offset.append_aml_bytes(bytes); /* RegionOffset */
+        self.length.append_aml_bytes(bytes); /* RegionLen */
    }
 }

@@ -832,21 +787,18 @@ impl<'a> If<'a> {
 }

 impl<'a> Aml for If<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-        bytes.extend_from_slice(&self.predicate.to_aml_bytes());
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        let mut tmp = Vec::new();
+        self.predicate.append_aml_bytes(&mut tmp);
        for child in self.if_children.iter() {
-            bytes.extend_from_slice(&child.to_aml_bytes());
+            child.append_aml_bytes(&mut tmp);
        }

-        let mut pkg_length = create_pkg_length(&bytes, true);
-        pkg_length.reverse();
-        for byte in pkg_length {
-            bytes.insert(0, byte);
-        }
+        let pkg_length = create_pkg_length(&tmp, true);

-        bytes.insert(0, 0xa0); /* IfOp */
-        bytes
+        bytes.push(0xa0); /* IfOp */
+        bytes.extend_from_slice(&pkg_length);
+        bytes.extend_from_slice(&tmp);
    }
 }

@@ -862,11 +814,10 @@ impl<'a> Equal<'a> {
 }

 impl<'a> Aml for Equal<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x93]; /* LEqualOp */
-        bytes.extend_from_slice(&self.left.to_aml_bytes());
-        bytes.extend_from_slice(&self.right.to_aml_bytes());
-        bytes
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x93); /* LEqualOp */
+        self.left.append_aml_bytes(bytes);
+        self.right.append_aml_bytes(bytes);
    }
 }

@@ -882,33 +833,28 @@ impl<'a> LessThan<'a> {
 }

 impl<'a> Aml for LessThan<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x95]; /* LLessOp */
-        bytes.extend_from_slice(&self.left.to_aml_bytes());
-        bytes.extend_from_slice(&self.right.to_aml_bytes());
-        bytes
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x95); /* LLessOp */
+        self.left.append_aml_bytes(bytes);
+        self.right.append_aml_bytes(bytes);
    }
 }

 pub struct Arg(pub u8);

 impl Aml for Arg {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
        assert!(self.0 <= 6);
        bytes.push(0x68 + self.0); /* Arg0Op */
-        bytes
    }
 }

 pub struct Local(pub u8);

 impl Aml for Local {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
        assert!(self.0 <= 7);
        bytes.push(0x60 + self.0); /* Local0Op */
-        bytes
    }
 }

@@ -924,11 +870,10 @@ impl<'a> Store<'a> {
 }

 impl<'a> Aml for Store<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x70]; /* StoreOp */
-        bytes.extend_from_slice(&self.value.to_aml_bytes());
-        bytes.extend_from_slice(&self.name.to_aml_bytes());
-        bytes
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x70); /* StoreOp */
+        self.value.append_aml_bytes(bytes);
+        self.name.append_aml_bytes(bytes);
    }
 }

@@ -944,12 +889,11 @@ impl Mutex {
 }

 impl Aml for Mutex {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x5b]; /* ExtOpPrefix */
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x5b); /* ExtOpPrefix */
        bytes.push(0x01); /* MutexOp */
-        bytes.extend_from_slice(&self.path.to_aml_bytes());
+        self.path.append_aml_bytes(bytes);
        bytes.push(self.sync_level);
-        bytes
    }
 }

@@ -965,12 +909,11 @@ impl Acquire {
 }

 impl Aml for Acquire {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x5b]; /* ExtOpPrefix */
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x5b); /* ExtOpPrefix */
        bytes.push(0x23); /* AcquireOp */
-        bytes.extend_from_slice(&self.mutex.to_aml_bytes());
+        self.mutex.append_aml_bytes(bytes);
        bytes.extend_from_slice(&self.timeout.to_le_bytes());
-        bytes
    }
 }

@@ -985,11 +928,10 @@ impl Release {
 }

 impl Aml for Release {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x5b]; /* ExtOpPrefix */
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x5b); /* ExtOpPrefix */
        bytes.push(0x27); /* ReleaseOp */
-        bytes.extend_from_slice(&self.mutex.to_aml_bytes());
-        bytes
+        self.mutex.append_aml_bytes(bytes);
    }
 }

@@ -1005,11 +947,10 @@ impl<'a> Notify<'a> {
 }

 impl<'a> Aml for Notify<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x86]; /* NotifyOp */
-        bytes.extend_from_slice(&self.object.to_aml_bytes());
-        bytes.extend_from_slice(&self.value.to_aml_bytes());
-        bytes
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x86); /* NotifyOp */
+        self.object.append_aml_bytes(bytes);
+        self.value.append_aml_bytes(bytes);
    }
 }

@@ -1028,21 +969,18 @@ impl<'a> While<'a> {
 }

 impl<'a> Aml for While<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-        bytes.extend_from_slice(&self.predicate.to_aml_bytes());
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        let mut tmp = Vec::new();
+        self.predicate.append_aml_bytes(&mut tmp);
        for child in self.while_children.iter() {
-            bytes.extend_from_slice(&child.to_aml_bytes());
+            child.append_aml_bytes(&mut tmp)
        }

-        let mut pkg_length = create_pkg_length(&bytes, true);
-        pkg_length.reverse();
-        for byte in pkg_length {
-            bytes.insert(0, byte);
-        }
+        let pkg_length = create_pkg_length(&tmp, true);

-        bytes.insert(0, 0xa2); /* WhileOp */
-        bytes
+        bytes.push(0xa2); /* WhileOp */
+        bytes.extend_from_slice(&pkg_length);
+        bytes.extend_from_slice(&tmp);
    }
 }

@@ -1061,12 +999,11 @@ macro_rules! binary_op {
        }

        impl<'a> Aml for $name<'a> {
-            fn to_aml_bytes(&self) -> Vec<u8> {
-                let mut bytes = vec![$opcode]; /* Op for the binary operator */
-                bytes.extend_from_slice(&self.a.to_aml_bytes());
-                bytes.extend_from_slice(&self.b.to_aml_bytes());
-                bytes.extend_from_slice(&self.target.to_aml_bytes());
-                bytes
+            fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+                bytes.push($opcode); /* Op for the binary operator */
+                self.a.append_aml_bytes(bytes);
+                self.b.append_aml_bytes(bytes);
+                self.target.append_aml_bytes(bytes);
            }
        }
    };
@@ -1101,13 +1038,11 @@ impl<'a> MethodCall<'a> {
 }

 impl<'a> Aml for MethodCall<'a> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-        bytes.extend_from_slice(&self.name.to_aml_bytes());
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        self.name.append_aml_bytes(bytes);
        for arg in self.args.iter() {
-            bytes.extend_from_slice(&arg.to_aml_bytes());
+            arg.append_aml_bytes(bytes);
        }
-        bytes
    }
 }

@@ -1122,20 +1057,16 @@ impl Buffer {
 }

 impl Aml for Buffer {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-        bytes.extend_from_slice(&self.data.len().to_aml_bytes());
-        bytes.extend_from_slice(&self.data);
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        let mut tmp = Vec::new();
+        self.data.len().append_aml_bytes(&mut tmp);
+        tmp.extend_from_slice(&self.data);

-        let mut pkg_length = create_pkg_length(&bytes, true);
-        pkg_length.reverse();
-        for byte in pkg_length {
-            bytes.insert(0, byte);
-        }
+        let pkg_length = create_pkg_length(&tmp, true);

-        bytes.insert(0, 0x11); /* BufferOp */
-
-        bytes
+        bytes.push(0x11); /* BufferOp */
+        bytes.extend_from_slice(&pkg_length);
+        bytes.extend_from_slice(&tmp);
    }
 }

@@ -1158,22 +1089,20 @@ impl<'a, T> CreateField<'a, T> {
 }

 impl<'a> Aml for CreateField<'a, u64> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x8f]; /* CreateQWordFieldOp */
-        bytes.extend_from_slice(&self.buffer.to_aml_bytes());
-        bytes.extend_from_slice(&self.offset.to_aml_bytes());
-        bytes.extend_from_slice(&self.field.to_aml_bytes());
-        bytes
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x8f); /* CreateQWordFieldOp */
+        self.buffer.append_aml_bytes(bytes);
+        self.offset.append_aml_bytes(bytes);
+        self.field.append_aml_bytes(bytes);
    }
 }

 impl<'a> Aml for CreateField<'a, u32> {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        let mut bytes = vec![0x8a]; /* CreateDWordFieldOp */
-        bytes.extend_from_slice(&self.buffer.to_aml_bytes());
-        bytes.extend_from_slice(&self.offset.to_aml_bytes());
-        bytes.extend_from_slice(&self.field.to_aml_bytes());
-        bytes
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
+        bytes.push(0x8a); /* CreateDWordFieldOp */
+        self.buffer.append_aml_bytes(bytes);
+        self.offset.append_aml_bytes(bytes);
+        self.field.append_aml_bytes(bytes);
    }
 }

--- a/acpi_tables/src/rsdp.rs
+++ b/acpi_tables/src/rsdp.rs
@@ -19,6 +19,7 @@ pub struct Rsdp {
    _reserved: [u8; 3],
 }

+// SAFETY: Rsdp only contains a series of integers
 unsafe impl ByteValued for Rsdp {}

 impl Rsdp {
--- a/api_client/Cargo.toml
+++ b/api_client/Cargo.toml
@@ -5,4 +5,4 @@ authors = ["The Cloud Hypervisor Authors"]
 edition = "2018"

 [dependencies]
-vmm-sys-util = "0.8.0"
+vmm-sys-util = "0.9.0"
--- a/arch/Cargo.toml
+++ b/arch/Cargo.toml
@@ -11,20 +11,21 @@ tdx = []

 [dependencies]
 acpi_tables = { path = "../acpi_tables", optional = true }
-anyhow = "1.0"
+anyhow = "1.0.51"
 byteorder = "1.4.3"
 hypervisor = { path = "../hypervisor" }
-libc = "0.2.98"
-linux-loader = { version = "0.3.0", features = ["elf", "bzimage", "pe"] }
+libc = "0.2.108"
+linux-loader = { version = "0.4.0", features = ["elf", "bzimage", "pe"] }
 log = "0.4.14"
-serde = {version = ">=1.0.27", features = ["rc"] }
-thiserror = "1.0"
+serde = { version = "1.0.130", features = ["rc"] }
+serde_derive = "1.0.130"
+thiserror = "1.0.30"
 versionize = "0.1.6"
 versionize_derive = "0.1.4"
-vm-memory = { version = "0.5.0", features = ["backend-mmap", "backend-bitmap"] }
+vm-memory = { version = "0.6.0", features = ["backend-mmap", "backend-bitmap"] }
 vm-migration = { path = "../vm-migration" }
-vmm-sys-util = { version = ">=0.5.0", features = ["with-serde"] }
+vmm-sys-util = { version = "0.9.0", features = ["with-serde"] }

 [target.'cfg(target_arch = "aarch64")'.dependencies]
 fdt_parser = { version = "0.1.3", package = 'fdt'}
-vm-fdt = { git = "https://github.com/rust-vmm/vm-fdt", branch = "master" }
+vm-fdt = { git = "https://github.com/rust-vmm/vm-fdt", branch = "main" }
--- a/arch/src/aarch64/fdt.rs
+++ b/arch/src/aarch64/fdt.rs
@@ -6,6 +6,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the THIRD-PARTY file.

+use crate::NumaNodes;
 use byteorder::{BigEndian, ByteOrder};
 use std::cmp;
 use std::collections::HashMap;
@@ -24,7 +25,7 @@ use super::layout::{
    PCI_HIGH_BASE, PCI_MMCONFIG_SIZE, PCI_MMCONFIG_START,
 };
 use vm_fdt::{FdtWriter, FdtWriterResult};
-use vm_memory::{Address, Bytes, GuestAddress, GuestMemory, GuestMemoryError};
+use vm_memory::{Address, Bytes, GuestAddress, GuestMemory, GuestMemoryError, GuestMemoryRegion};

 // This is a value for uniquely identifying the FDT node declaring the interrupt controller.
 const GIC_PHANDLE: u32 = 1;
@@ -34,6 +35,12 @@ const MSI_PHANDLE: u32 = 2;
 const CLOCK_PHANDLE: u32 = 3;
 // This is a value for uniquely identifying the FDT node containing the gpio controller.
 const GPIO_PHANDLE: u32 = 4;
+// This is a value for virtio-iommu. Now only one virtio-iommu device is supported.
+const VIRTIO_IOMMU_PHANDLE: u32 = 5;
+// NOTE: Keep FIRST_VCPU_PHANDLE the last PHANDLE defined.
+// This is a value for uniquely identifying the FDT node containing the first vCPU.
+// The last number of vCPU phandle depends on the number of vCPUs.
+const FIRST_VCPU_PHANDLE: u32 = 6;

 // Read the documentation specified when appending the root node to the FDT.
 const ADDRESS_CELLS: u32 = 0x2;
@@ -72,14 +79,18 @@ pub enum Error {
 type Result<T> = result::Result<T, Error>;

 /// Creates the flattened device tree for this aarch64 VM.
+#[allow(clippy::too_many_arguments)]
 pub fn create_fdt<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::BuildHasher>(
    guest_mem: &GuestMemoryMmap,
-    cmdline: &CStr,
+    cmdline: &str,
    vcpu_mpidr: Vec<u64>,
+    vcpu_topology: Option<(u8, u8, u8)>,
    device_info: &HashMap<(DeviceType, String), T, S>,
    gic_device: &dyn GicDevice,
    initrd: &Option<InitramfsConfig>,
    pci_space_address: &(u64, u64),
+    numa_nodes: &NumaNodes,
+    virtio_iommu_bdf: Option<u32>,
 ) -> FdtWriterResult<Vec<u8>> {
    // Allocate stuff necessary for the holding the blob.
    let mut fdt = FdtWriter::new().unwrap();
@@ -98,15 +109,23 @@ pub fn create_fdt<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::BuildHash
    // This is not mandatory but we use it to point the root node to the node
    // containing description of the interrupt controller for this VM.
    fdt.property_u32("interrupt-parent", GIC_PHANDLE)?;
-    create_cpu_nodes(&mut fdt, &vcpu_mpidr)?;
-    create_memory_node(&mut fdt, guest_mem)?;
-    create_chosen_node(&mut fdt, cmdline.to_str().unwrap(), initrd)?;
+    create_cpu_nodes(&mut fdt, &vcpu_mpidr, vcpu_topology, numa_nodes)?;
+    create_memory_node(&mut fdt, guest_mem, numa_nodes)?;
+    create_chosen_node(&mut fdt, cmdline, initrd)?;
    create_gic_node(&mut fdt, gic_device)?;
    create_timer_node(&mut fdt)?;
    create_clock_node(&mut fdt)?;
    create_psci_node(&mut fdt)?;
    create_devices_node(&mut fdt, device_info)?;
-    create_pci_nodes(&mut fdt, pci_space_address.0, pci_space_address.1)?;
+    create_pci_nodes(
+        &mut fdt,
+        pci_space_address.0,
+        pci_space_address.1,
+        virtio_iommu_bdf,
+    )?;
+    if numa_nodes.len() > 1 {
+        create_distance_map_node(&mut fdt, numa_nodes)?;
+    }

    // End Header node.
    fdt.end_node(root_node)?;
@@ -126,12 +145,21 @@ pub fn write_fdt_to_memory(fdt_final: Vec<u8>, guest_mem: &GuestMemoryMmap) -> R
 }

 // Following are the auxiliary function for creating the different nodes that we append to our FDT.
-fn create_cpu_nodes(fdt: &mut FdtWriter, vcpu_mpidr: &[u64]) -> FdtWriterResult<()> {
+fn create_cpu_nodes(
+    fdt: &mut FdtWriter,
+    vcpu_mpidr: &[u64],
+    vcpu_topology: Option<(u8, u8, u8)>,
+    numa_nodes: &NumaNodes,
+) -> FdtWriterResult<()> {
    // See https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/arm/cpus.yaml.
    let cpus_node = fdt.begin_node("cpus")?;
    fdt.property_u32("#address-cells", 0x1)?;
    fdt.property_u32("#size-cells", 0x0)?;
+
    let num_cpus = vcpu_mpidr.len();
+    let threads_per_core = vcpu_topology.unwrap_or_default().0 as u8;
+    let cores_per_package = vcpu_topology.unwrap_or_default().1 as u8;
+    let packages = vcpu_topology.unwrap_or_default().2 as u8;

    for (cpu_id, mpidr) in vcpu_mpidr.iter().enumerate().take(num_cpus) {
        let cpu_name = format!("cpu@{:x}", cpu_id);
@@ -145,22 +173,129 @@ fn create_cpu_nodes(fdt: &mut FdtWriter, vcpu_mpidr: &[u64]) -> FdtWriterResult<
        // Set the field to first 24 bits of the MPIDR - Multiprocessor Affinity Register.
        // See http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0488c/BABHBJCI.html.
        fdt.property_u32("reg", (mpidr & 0x7FFFFF) as u32)?;
+        fdt.property_u32("phandle", cpu_id as u32 + FIRST_VCPU_PHANDLE)?;
+
+        // Add `numa-node-id` property if there is any numa config.
+        if numa_nodes.len() > 1 {
+            for numa_node_idx in 0..numa_nodes.len() {
+                let numa_node = numa_nodes.get(&(numa_node_idx as u32));
+                if numa_node.unwrap().cpus.contains(&(cpu_id as u8)) {
+                    fdt.property_u32("numa-node-id", numa_node_idx as u32)?;
+                }
+            }
+        }
+
        fdt.end_node(cpu_node)?;
    }
+
+    // If there is a valid cpu topology config, create the cpu-map node.
+    if (threads_per_core > 0)
+        && (cores_per_package > 0)
+        && (packages > 0)
+        && (num_cpus as u8 == threads_per_core * cores_per_package * packages)
+    {
+        let cpu_map_node = fdt.begin_node("cpu-map")?;
+        // Create mappings between CPU index and cluster,core, and thread.
+        let mut cluster_core_thread_to_cpuidx = HashMap::new();
+        for cpu_idx in 0..num_cpus as u8 {
+            if threads_per_core > 1 {
+                cluster_core_thread_to_cpuidx.insert(
+                    (
+                        cpu_idx / (cores_per_package * threads_per_core),
+                        (cpu_idx / threads_per_core) % cores_per_package,
+                        cpu_idx % threads_per_core,
+                    ),
+                    cpu_idx,
+                );
+            } else {
+                cluster_core_thread_to_cpuidx.insert(
+                    (cpu_idx / cores_per_package, cpu_idx % cores_per_package, 0),
+                    cpu_idx,
+                );
+            }
+        }
+
+        // Create device tree nodes with regard of above mapping.
+        for cluster_idx in 0..packages {
+            let cluster_name = format!("cluster{:x}", cluster_idx);
+            let cluster_node = fdt.begin_node(&cluster_name)?;
+
+            for core_idx in 0..cores_per_package {
+                let core_name = format!("core{:x}", core_idx);
+                let core_node = fdt.begin_node(&core_name)?;
+
+                if threads_per_core > 1 {
+                    for thread_idx in 0..threads_per_core {
+                        let thread_name = format!("thread{:x}", thread_idx);
+                        let thread_node = fdt.begin_node(&thread_name)?;
+                        let cpu_idx = cluster_core_thread_to_cpuidx
+                            .get(&(cluster_idx, core_idx, thread_idx))
+                            .unwrap();
+
+                        fdt.property_u32("cpu", *cpu_idx as u32 + FIRST_VCPU_PHANDLE)?;
+                        fdt.end_node(thread_node)?;
+                    }
+                } else {
+                    let cpu_idx = cluster_core_thread_to_cpuidx
+                        .get(&(cluster_idx, core_idx, 0))
+                        .unwrap();
+
+                    fdt.property_u32("cpu", *cpu_idx as u32 + FIRST_VCPU_PHANDLE)?;
+                }
+                fdt.end_node(core_node)?;
+            }
+            fdt.end_node(cluster_node)?;
+        }
+        fdt.end_node(cpu_map_node)?;
+    } else {
+        debug!("Boot using device tree, CPU topology is not (correctly) specified");
+    }
+
    fdt.end_node(cpus_node)?;
+
    Ok(())
 }

-fn create_memory_node(fdt: &mut FdtWriter, guest_mem: &GuestMemoryMmap) -> FdtWriterResult<()> {
-    let mem_size = guest_mem.last_addr().raw_value() - super::layout::RAM_64BIT_START + 1;
-    // See https://github.com/torvalds/linux/blob/master/Documentation/devicetree/booting-without-of.txt#L960
-    // for an explanation of this.
-    let mem_reg_prop = [super::layout::RAM_64BIT_START as u64, mem_size as u64];
+fn create_memory_node(
+    fdt: &mut FdtWriter,
+    guest_mem: &GuestMemoryMmap,
+    numa_nodes: &NumaNodes,
+) -> FdtWriterResult<()> {
+    if numa_nodes.len() > 1 {
+        for numa_node_idx in 0..numa_nodes.len() {
+            let numa_node = numa_nodes.get(&(numa_node_idx as u32));
+            // Each memory zone of numa will have its own memory node, but
+            // different numa nodes should not share same memory zones.
+            for memory_region in numa_node.unwrap().memory_regions.iter() {
+                let memory_region_start_addr: u64 = memory_region.start_addr().raw_value();
+                let memory_region_size: u64 = memory_region.size() as u64;
+                let mem_reg_prop = [memory_region_start_addr, memory_region_size];
+                // With feature `acpi` enabled, RAM at 0-4M is for edk2 only
+                // and should be hidden to the guest.
+                #[cfg(feature = "acpi")]
+                if memory_region_start_addr == 0 {
+                    continue;
+                }

-    let memory_node = fdt.begin_node("memory")?;
-    fdt.property_string("device_type", "memory")?;
-    fdt.property_array_u64("reg", &mem_reg_prop)?;
-    fdt.end_node(memory_node)?;
+                let memory_node_name = format!("memory@{:x}", memory_region_start_addr);
+                let memory_node = fdt.begin_node(&memory_node_name)?;
+                fdt.property_string("device_type", "memory")?;
+                fdt.property_array_u64("reg", &mem_reg_prop)?;
+                fdt.property_u32("numa-node-id", numa_node_idx as u32)?;
+                fdt.end_node(memory_node)?;
+            }
+        }
+    } else {
+        let mem_size = guest_mem.last_addr().raw_value() - super::layout::RAM_64BIT_START + 1;
+        // See https://github.com/torvalds/linux/blob/master/Documentation/devicetree/booting-without-of.txt#L960
+        // for an explanation of this.
+        let mem_reg_prop = [super::layout::RAM_64BIT_START as u64, mem_size as u64];
+        let memory_node = fdt.begin_node("memory")?;
+
+        fdt.property_string("device_type", "memory")?;
+        fdt.property_array_u64("reg", &mem_reg_prop)?;
+        fdt.end_node(memory_node)?;
+    }

    Ok(())
 }
@@ -414,6 +549,7 @@ fn create_pci_nodes(
    fdt: &mut FdtWriter,
    pci_device_base: u64,
    pci_device_size: u64,
+    virtio_iommu_bdf: Option<u32>,
 ) -> FdtWriterResult<()> {
    // Add node for PCIe controller.
    // See Documentation/devicetree/bindings/pci/host-generic-pci.txt in the kernel
@@ -477,11 +613,86 @@ fn create_pci_nodes(
    fdt.property_null("interrupt-map-mask")?;
    fdt.property_null("dma-coherent")?;
    fdt.property_u32("msi-parent", MSI_PHANDLE)?;
+
+    if let Some(virtio_iommu_bdf) = virtio_iommu_bdf {
+        // See kernel document Documentation/devicetree/bindings/pci/pci-iommu.txt
+        // for 'iommu-map' attribute setting.
+        let iommu_map = [
+            0_u32,
+            VIRTIO_IOMMU_PHANDLE,
+            0_u32,
+            virtio_iommu_bdf,
+            virtio_iommu_bdf + 1,
+            VIRTIO_IOMMU_PHANDLE,
+            virtio_iommu_bdf + 1,
+            0xffff - virtio_iommu_bdf,
+        ];
+        fdt.property_array_u32("iommu-map", &iommu_map)?;
+
+        // See kernel document Documentation/devicetree/bindings/virtio/iommu.txt
+        // for virtio-iommu node settings.
+        let virtio_iommu_node_name = format!("virtio_iommu@{:x}", virtio_iommu_bdf);
+        let virtio_iommu_node = fdt.begin_node(&virtio_iommu_node_name)?;
+        fdt.property_u32("#iommu-cells", 1)?;
+        fdt.property_string("compatible", "virtio,pci-iommu")?;
+
+        // 'reg' is a five-cell address encoded as
+        // (phys.hi phys.mid phys.lo size.hi size.lo). phys.hi should contain the
+        // device's BDF as 0b00000000 bbbbbbbb dddddfff 00000000. The other cells
+        // should be zero.
+        let reg = [virtio_iommu_bdf << 8, 0_u32, 0_u32, 0_u32, 0_u32];
+        fdt.property_array_u32("reg", &reg)?;
+        fdt.property_u32("phandle", VIRTIO_IOMMU_PHANDLE)?;
+
+        fdt.end_node(virtio_iommu_node)?;
+    }
+
    fdt.end_node(pci_node)?;

    Ok(())
 }

+fn create_distance_map_node(fdt: &mut FdtWriter, numa_nodes: &NumaNodes) -> FdtWriterResult<()> {
+    let distance_map_node = fdt.begin_node("distance-map")?;
+    fdt.property_string("compatible", "numa-distance-map-v1")?;
+    // Construct the distance matrix.
+    // 1. We use the word entry to describe a distance from a node to
+    // its destination, e.g. 0 -> 1 = 20 is described as <0 1 20>.
+    // 2. Each entry represents distance from first node to second node.
+    // The distances are equal in either direction.
+    // 3. The distance from a node to self (local distance) is represented
+    // with value 10 and all internode distance should be represented with
+    // a value greater than 10.
+    // 4. distance-matrix should have entries in lexicographical ascending
+    // order of nodes.
+    let mut distance_matrix = Vec::new();
+    for numa_node_idx in 0..numa_nodes.len() {
+        let numa_node = numa_nodes.get(&(numa_node_idx as u32));
+        for dest_numa_node in 0..numa_node.unwrap().distances.len() + 1 {
+            if numa_node_idx == dest_numa_node {
+                distance_matrix.push(numa_node_idx as u32);
+                distance_matrix.push(dest_numa_node as u32);
+                distance_matrix.push(10_u32);
+                continue;
+            }
+
+            distance_matrix.push(numa_node_idx as u32);
+            distance_matrix.push(dest_numa_node as u32);
+            distance_matrix.push(
+                *numa_node
+                    .unwrap()
+                    .distances
+                    .get(&(dest_numa_node as u32))
+                    .unwrap() as u32,
+            );
+        }
+    }
+    fdt.property_array_u32("distance-matrix", distance_matrix.as_ref())?;
+    fdt.end_node(distance_map_node)?;
+
+    Ok(())
+}
+
 // Parse the DTB binary and print for debugging
 pub fn print_fdt(dtb: &[u8]) {
    match fdt_parser::Fdt::new(dtb) {
--- a/arch/src/aarch64/gic/gicv3.rs
+++ b/arch/src/aarch64/gic/gicv3.rs
@@ -78,23 +78,17 @@ pub mod kvm {
    impl VersionMapped for Gicv3State {}

    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
+            layout::GIC_V3_DIST_START
        }

        /// Get the size of the GIC distributor.
        pub fn get_dist_size() -> u64 {
-            KvmGicV3::KVM_VGIC_V3_DIST_SIZE
+            layout::GIC_V3_DIST_SIZE
        }

        /// Get the address of the GIC redistributors.
@@ -104,14 +98,11 @@ pub mod kvm {

        /// Get the size of the GIC redistributors.
        pub fn get_redists_size(vcpu_count: u64) -> u64 {
-            vcpu_count * KvmGicV3::KVM_VGIC_V3_REDIST_SIZE
+            vcpu_count * layout::GIC_V3_REDIST_SIZE
        }

        /// Save the state of GIC.
        fn state(&self, gicr_typers: &[u64]) -> Result<Gicv3State> {
-            // Flush redistributors pending tables to guest RAM.
-            save_pending_tables(self.device()).map_err(Error::SavePendingTables)?;
-
            let gicd_ctlr =
                read_ctlr(self.device()).map_err(Error::SaveDistributorCtrlRegisters)?;

@@ -255,7 +246,16 @@ pub mod kvm {
        }
    }

-    impl Pausable for KvmGicV3 {}
+    impl Pausable for KvmGicV3 {
+        fn pause(&mut self) -> std::result::Result<(), MigratableError> {
+            // Flush redistributors pending tables to guest RAM.
+            save_pending_tables(self.device()).map_err(|e| {
+                MigratableError::Pause(anyhow!("Could not save GICv3 GIC pending tables {:?}", e))
+            })?;
+
+            Ok(())
+        }
+    }
    impl Transportable for KvmGicV3 {}
    impl Migratable for KvmGicV3 {}
 }
--- a/arch/src/aarch64/gic/gicv3_its.rs
+++ b/arch/src/aarch64/gic/gicv3_its.rs
@@ -13,6 +13,7 @@ pub mod kvm {
    use crate::aarch64::gic::gicv3::kvm::KvmGicV3;
    use crate::aarch64::gic::kvm::{save_pending_tables, KvmGicDevice};
    use crate::aarch64::gic::GicDevice;
+    use crate::layout;
    use anyhow::anyhow;
    use hypervisor::kvm::kvm_bindings;
    use hypervisor::CpuState;
@@ -179,10 +180,8 @@ pub mod kvm {
    impl VersionMapped for Gicv3ItsState {}

    impl KvmGicV3Its {
-        const KVM_VGIC_V3_ITS_SIZE: u64 = (2 * KvmGicV3::SZ_64K);
-
        fn get_msi_size() -> u64 {
-            KvmGicV3Its::KVM_VGIC_V3_ITS_SIZE
+            layout::GIC_V3_ITS_SIZE
        }

        fn get_msi_addr(vcpu_count: u64) -> u64 {
@@ -191,9 +190,6 @@ pub mod kvm {

        /// Save the state of GICv3ITS.
        fn state(&self, gicr_typers: &[u64]) -> Result<Gicv3ItsState> {
-            // Flush redistributors pending tables to guest RAM.
-            save_pending_tables(self.device()).map_err(Error::SavePendingTables)?;
-
            let gicd_ctlr =
                read_ctlr(self.device()).map_err(Error::SaveDistributorCtrlRegisters)?;

@@ -206,10 +202,6 @@ pub mod kvm {
            let icc_state =
                get_icc_regs(self.device(), gicr_typers).map_err(Error::SaveIccRegisters)?;

-            // Save GICv3ITS registers
-            gicv3_its_tables_access(self.its_device().unwrap(), true)
-                .map_err(Error::SaveITSTables)?;
-
            let its_baser_state: [u64; 8] = [0; 8];
            for i in 0..8 {
                gicv3_its_attr_access(
@@ -501,7 +493,23 @@ pub mod kvm {
        }
    }

-    impl Pausable for KvmGicV3Its {}
+    impl Pausable for KvmGicV3Its {
+        fn pause(&mut self) -> std::result::Result<(), MigratableError> {
+            // Flush redistributors pending tables to guest RAM.
+            save_pending_tables(self.device()).map_err(|e| {
+                MigratableError::Pause(anyhow!(
+                    "Could not save GICv3ITS GIC pending tables {:?}",
+                    e
+                ))
+            })?;
+            // Flush ITS tables to guest RAM.
+            gicv3_its_tables_access(self.its_device().unwrap(), true).map_err(|e| {
+                MigratableError::Pause(anyhow!("Could not save GICv3ITS ITS tables {:?}", e))
+            })?;
+
+            Ok(())
+        }
+    }
    impl Transportable for KvmGicV3Its {}
    impl Migratable for KvmGicV3Its {}
 }
--- a/arch/src/aarch64/layout.rs
+++ b/arch/src/aarch64/layout.rs
@@ -55,6 +55,17 @@ pub const UEFI_SIZE: u64 = 0x040_0000;
 /// Below this address will reside the GIC, above this address will reside the MMIO devices.
 pub const MAPPED_IO_START: u64 = 0x0900_0000;

+/// See kernel file arch/arm64/include/uapi/asm/kvm.h for the GIC related definitions.
+/// 0x08ff_0000 ~ 0x0900_0000 is reserved for GICv3 Distributor
+pub const GIC_V3_DIST_SIZE: u64 = 0x01_0000;
+pub const GIC_V3_DIST_START: u64 = MAPPED_IO_START - GIC_V3_DIST_SIZE;
+/// Below 0x08ff_0000 is reserved for GICv3 Redistributor.
+/// The size defined here is for each vcpu.
+/// The total size is 'number_of_vcpu * GIC_V3_REDIST_SIZE'
+pub const GIC_V3_REDIST_SIZE: u64 = 0x02_0000;
+/// Below Redistributor area is GICv3 ITS
+pub const GIC_V3_ITS_SIZE: u64 = 0x02_0000;
+
 /// Space 0x0900_0000 ~ 0x0905_0000 is reserved for legacy devices.
 pub const LEGACY_SERIAL_MAPPED_IO_START: u64 = 0x0900_0000;
 pub const LEGACY_RTC_MAPPED_IO_START: u64 = 0x0901_0000;
--- a/arch/src/aarch64/mod.rs
+++ b/arch/src/aarch64/mod.rs
@@ -14,14 +14,11 @@ pub mod regs;
 pub mod uefi;

 pub use self::fdt::DeviceInfoForFdt;
-use crate::DeviceType;
-use crate::GuestMemoryMmap;
-use crate::RegionType;
+use crate::{DeviceType, GuestMemoryMmap, NumaNodes, RegionType};
 use gic::GicDevice;
 use log::{log_enabled, Level};
 use std::collections::HashMap;
 use std::convert::TryInto;
-use std::ffi::CStr;
 use std::fmt::Debug;
 use std::sync::Arc;
 use vm_memory::{
@@ -135,23 +132,30 @@ pub fn arch_memory_regions(size: GuestUsize) -> Vec<(GuestAddress, usize, Region
 }

 /// Configures the system and should be called once per vm before starting vcpu threads.
+#[allow(clippy::too_many_arguments)]
 pub fn configure_system<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::BuildHasher>(
    guest_mem: &GuestMemoryMmap,
-    cmdline_cstring: &CStr,
+    cmdline: &str,
    vcpu_mpidr: Vec<u64>,
+    vcpu_topology: Option<(u8, u8, u8)>,
    device_info: &HashMap<(DeviceType, String), T, S>,
    initrd: &Option<super::InitramfsConfig>,
    pci_space_address: &(u64, u64),
+    virtio_iommu_bdf: Option<u32>,
    gic_device: &dyn GicDevice,
+    numa_nodes: &NumaNodes,
 ) -> super::Result<()> {
    let fdt_final = fdt::create_fdt(
        guest_mem,
-        cmdline_cstring,
+        cmdline,
        vcpu_mpidr,
+        vcpu_topology,
        device_info,
        gic_device,
        initrd,
        pci_space_address,
+        numa_nodes,
+        virtio_iommu_bdf,
    )
    .map_err(|_| Error::SetupFdt)?;

--- a/arch/src/lib.rs
+++ b/arch/src/lib.rs
@@ -10,11 +10,21 @@

 #[macro_use]
 extern crate log;
+#[macro_use]
+extern crate serde_derive;

+#[cfg(target_arch = "x86_64")]
+use crate::x86_64::SgxEpcSection;
+use std::collections::BTreeMap;
 use std::fmt;
 use std::result;
+use std::sync::Arc;
+use versionize::{VersionMap, Versionize, VersionizeError, VersionizeResult};
+use versionize_derive::Versionize;
+use vm_migration::VersionMapped;

 type GuestMemoryMmap = vm_memory::GuestMemoryMmap<vm_memory::bitmap::AtomicBitmap>;
+type GuestRegionMmap = vm_memory::GuestRegionMmap<vm_memory::bitmap::AtomicBitmap>;

 /// Type for returning error code.
 #[derive(Debug)]
@@ -49,7 +59,7 @@ pub enum Error {
 pub type Result<T> = result::Result<T, Error>;

 /// Type for memory region types.
-#[derive(PartialEq, Debug)]
+#[derive(Clone, Copy, PartialEq, Debug, Serialize, Deserialize, Versionize)]
 pub enum RegionType {
    /// RAM type
    Ram,
@@ -67,6 +77,8 @@ pub enum RegionType {
    Reserved,
 }

+impl VersionMapped for RegionType {}
+
 /// Module for aarch64 related functionality.
 #[cfg(target_arch = "aarch64")]
 pub mod aarch64;
@@ -85,7 +97,7 @@ pub mod x86_64;
 pub use x86_64::{
    arch_memory_regions, configure_system, configure_vcpu, generate_common_cpuid,
    get_host_cpu_phys_bits, initramfs_load_addr, layout, layout::CMDLINE_MAX_SIZE,
-    layout::CMDLINE_START, regs, EntryPoint,
+    layout::CMDLINE_START, regs, CpuidFeatureEntry, EntryPoint,
 };

 /// Safe wrapper for `sysconf(_SC_PAGESIZE)`.
@@ -96,6 +108,19 @@ fn pagesize() -> usize {
    unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize }
 }

+#[derive(Clone, Default)]
+pub struct NumaNode {
+    pub memory_regions: Vec<Arc<GuestRegionMmap>>,
+    pub hotplug_regions: Vec<Arc<GuestRegionMmap>>,
+    pub cpus: Vec<u8>,
+    pub distances: BTreeMap<u32, u8>,
+    pub memory_zones: Vec<String>,
+    #[cfg(target_arch = "x86_64")]
+    pub sgx_epc_sections: Vec<SgxEpcSection>,
+}
+
+pub type NumaNodes = BTreeMap<u32, NumaNode>;
+
 /// Type for passing information about the initramfs in the guest memory.
 pub struct InitramfsConfig {
    /// Load address of initramfs in guest memory
--- a/arch/src/x86_64/interrupts.rs
+++ b/arch/src/x86_64/interrupts.rs
@@ -95,22 +95,4 @@ mod tests {
        let mut klapic = LapicState::default();
        set_klapic_reg(&mut klapic, reg_offset, 3);
    }
-
-    #[test]
-    fn test_apic_delivery_mode() {
-        let mut v: Vec<u32> = Vec::new();
-        v.resize(20, 0);
-
-        unsafe {
-            assert_eq!(
-                libc::getrandom(v.as_mut_ptr() as *mut _ as *mut libc::c_void, 80, 0),
-                80
-            );
-        }
-
-        v.iter_mut()
-            .for_each(|x| *x = set_apic_delivery_mode(*x, 2));
-        let after: Vec<u32> = v.iter().map(|x| ((*x & !0x700) | ((2) << 8))).collect();
-        assert_eq!(v, after);
-    }
 }
--- a/arch/src/x86_64/layout.rs
+++ b/arch/src/x86_64/layout.rs
@@ -79,9 +79,9 @@ pub const HIGH_RAM_START: GuestAddress = GuestAddress(0x100000);

 // == No fixed addresses in the "High RAM" range ==

-// ** 32-bit reserved area (start: 3GiB, length: 1GiB) **
+// ** 32-bit reserved area (start: 3GiB, length: 896MiB) **
 pub const MEM_32BIT_RESERVED_START: GuestAddress = GuestAddress(0xc000_0000);
-pub const MEM_32BIT_RESERVED_SIZE: u64 = 1024 << 20;
+pub const MEM_32BIT_RESERVED_SIZE: u64 = PCI_MMCONFIG_SIZE + MEM_32BIT_DEVICES_SIZE;

 // == Fixed constants within the "32-bit reserved" range ==

--- a/arch/src/x86_64/mod.rs
+++ b/arch/src/x86_64/mod.rs
@@ -57,7 +57,7 @@ const KVM_FEATURE_STEAL_TIME_BIT: u8 = 5;
 /// is to be used to configure the guest initial state.
 pub struct EntryPoint {
    /// Address in guest memory where the guest must start execution
-    pub entry_addr: GuestAddress,
+    pub entry_addr: Option<GuestAddress>,
 }

 const E820_RAM: u32 = 1;
@@ -118,17 +118,15 @@ impl SgxEpcRegion {
 #[derive(Copy, Clone, Default)]
 struct StartInfoWrapper(hvm_start_info);

-// It is safe to initialize StartInfoWrapper which is a wrapper over `hvm_start_info` (a series of ints).
-unsafe impl ByteValued for StartInfoWrapper {}
-
 #[derive(Copy, Clone, Default)]
 struct MemmapTableEntryWrapper(hvm_memmap_table_entry);

-unsafe impl ByteValued for MemmapTableEntryWrapper {}
-
 #[derive(Copy, Clone, Default)]
 struct ModlistEntryWrapper(hvm_modlist_entry);

+// SAFETY: These data structures only contain a series of integers
+unsafe impl ByteValued for StartInfoWrapper {}
+unsafe impl ByteValued for MemmapTableEntryWrapper {}
 unsafe impl ByteValued for ModlistEntryWrapper {}

 // This is a workaround to the Rust enforcement specifying that any implementation of a foreign
@@ -139,7 +137,7 @@ unsafe impl ByteValued for ModlistEntryWrapper {}
 #[derive(Copy, Clone, Default)]
 struct BootParamsWrapper(boot_params);

-// It is safe to initialize BootParamsWrap which is a wrapper over `boot_params` (a series of ints).
+// SAFETY: BootParamsWrap is a wrapper over `boot_params` (a series of ints).
 unsafe impl ByteValued for BootParamsWrapper {}

 #[derive(Debug)]
@@ -185,6 +183,9 @@ pub enum Error {

    /// Error populating CPUID with CPU identification
    CpuidIdentification(vmm_sys_util::fam::Error),
+
+    /// Error checking CPUID compatibility
+    CpuidCheckCompatibility,
 }

 impl From<Error> for super::Error {
@@ -194,7 +195,7 @@ impl From<Error> for super::Error {
 }

 #[allow(dead_code, clippy::upper_case_acronyms)]
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, Debug)]
 pub enum CpuidReg {
    EAX,
    EBX,
@@ -338,6 +339,224 @@ impl CpuidPatch {
    }
 }

+#[derive(Debug)]
+enum CpuidCompatibleCheck {
+    BitwiseSubset, // bitwise subset
+    Equal,         // equal in value
+    NumNotGreater, // smaller or equal as a number
+}
+
+pub struct CpuidFeatureEntry {
+    function: u32,
+    index: u32,
+    feature_reg: CpuidReg,
+    compatible_check: CpuidCompatibleCheck,
+}
+
+impl CpuidFeatureEntry {
+    fn checked_feature_entry_list() -> Vec<CpuidFeatureEntry> {
+        vec![
+            // The following list includes all hardware features bits from
+            // the CPUID Wiki Page: https://en.wikipedia.org/wiki/CPUID
+            // Leaf 0x1, ECX/EDX, feature bits
+            CpuidFeatureEntry {
+                function: 1,
+                index: 0,
+                feature_reg: CpuidReg::ECX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            CpuidFeatureEntry {
+                function: 1,
+                index: 0,
+                feature_reg: CpuidReg::EDX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            // Leaf 0x7, EAX/EBX/ECX/EDX, extended features
+            CpuidFeatureEntry {
+                function: 7,
+                index: 0,
+                feature_reg: CpuidReg::EAX,
+                compatible_check: CpuidCompatibleCheck::NumNotGreater,
+            },
+            CpuidFeatureEntry {
+                function: 7,
+                index: 0,
+                feature_reg: CpuidReg::EBX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            CpuidFeatureEntry {
+                function: 7,
+                index: 0,
+                feature_reg: CpuidReg::ECX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            CpuidFeatureEntry {
+                function: 7,
+                index: 0,
+                feature_reg: CpuidReg::EDX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            // Leaf 0x7 subleaf 0x1, EAX, extended features
+            CpuidFeatureEntry {
+                function: 7,
+                index: 1,
+                feature_reg: CpuidReg::EAX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            // Leaf 0x8000_0001, ECX/EDX, CPUID features bits
+            CpuidFeatureEntry {
+                function: 0x8000_0001,
+                index: 0,
+                feature_reg: CpuidReg::ECX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            CpuidFeatureEntry {
+                function: 0x8000_0001,
+                index: 0,
+                feature_reg: CpuidReg::EDX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            // KVM CPUID bits: https://www.kernel.org/doc/html/latest/virt/kvm/cpuid.html
+            // Leaf 0x4000_0000, EAX/EBX/ECX/EDX, KVM CPUID SIGNATURE
+            CpuidFeatureEntry {
+                function: 0x4000_0000,
+                index: 0,
+                feature_reg: CpuidReg::EAX,
+                compatible_check: CpuidCompatibleCheck::NumNotGreater,
+            },
+            CpuidFeatureEntry {
+                function: 0x4000_0000,
+                index: 0,
+                feature_reg: CpuidReg::EBX,
+                compatible_check: CpuidCompatibleCheck::Equal,
+            },
+            CpuidFeatureEntry {
+                function: 0x4000_0000,
+                index: 0,
+                feature_reg: CpuidReg::ECX,
+                compatible_check: CpuidCompatibleCheck::Equal,
+            },
+            CpuidFeatureEntry {
+                function: 0x4000_0000,
+                index: 0,
+                feature_reg: CpuidReg::EDX,
+                compatible_check: CpuidCompatibleCheck::Equal,
+            },
+            // Leaf 0x4000_0001, EAX/EBX/ECX/EDX, KVM CPUID features
+            CpuidFeatureEntry {
+                function: 0x4000_0001,
+                index: 0,
+                feature_reg: CpuidReg::EAX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            CpuidFeatureEntry {
+                function: 0x4000_0001,
+                index: 0,
+                feature_reg: CpuidReg::EBX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            CpuidFeatureEntry {
+                function: 0x4000_0001,
+                index: 0,
+                feature_reg: CpuidReg::ECX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+            CpuidFeatureEntry {
+                function: 0x4000_0001,
+                index: 0,
+                feature_reg: CpuidReg::EDX,
+                compatible_check: CpuidCompatibleCheck::BitwiseSubset,
+            },
+        ]
+    }
+
+    fn get_features_from_cpuid(
+        cpuid: &CpuId,
+        feature_entry_list: &[CpuidFeatureEntry],
+    ) -> Vec<u32> {
+        let mut features = vec![0; feature_entry_list.len()];
+        for (i, feature_entry) in feature_entry_list.iter().enumerate() {
+            for cpuid_entry in cpuid.as_slice().iter() {
+                if cpuid_entry.function == feature_entry.function
+                    && cpuid_entry.index == feature_entry.index
+                {
+                    match feature_entry.feature_reg {
+                        CpuidReg::EAX => {
+                            features[i] = cpuid_entry.eax;
+                        }
+                        CpuidReg::EBX => {
+                            features[i] = cpuid_entry.ebx;
+                        }
+                        CpuidReg::ECX => {
+                            features[i] = cpuid_entry.ecx;
+                        }
+                        CpuidReg::EDX => {
+                            features[i] = cpuid_entry.edx;
+                        }
+                    }
+
+                    break;
+                }
+            }
+        }
+
+        features
+    }
+
+    // The function returns `Error` (a.k.a. "incompatible"), when the CPUID features from `src_vm_cpuid`
+    // is not a subset of those of the `dest_vm_cpuid`.
+    pub fn check_cpuid_compatibility(
+        src_vm_cpuid: &CpuId,
+        dest_vm_cpuid: &CpuId,
+    ) -> Result<(), Error> {
+        let feature_entry_list = &Self::checked_feature_entry_list();
+        let src_vm_features = Self::get_features_from_cpuid(src_vm_cpuid, feature_entry_list);
+        let dest_vm_features = Self::get_features_from_cpuid(dest_vm_cpuid, feature_entry_list);
+
+        // Loop on feature bit and check if the 'source vm' feature is a subset
+        // of those of the 'destination vm' feature
+        let mut compatible = true;
+        for (i, (src_vm_feature, dest_vm_feature)) in src_vm_features
+            .iter()
+            .zip(dest_vm_features.iter())
+            .enumerate()
+        {
+            let entry = &feature_entry_list[i];
+            let entry_compatible;
+            match entry.compatible_check {
+                CpuidCompatibleCheck::BitwiseSubset => {
+                    let different_feature_bits = src_vm_feature ^ dest_vm_feature;
+                    let src_vm_feature_bits_only = different_feature_bits & src_vm_feature;
+                    entry_compatible = src_vm_feature_bits_only == 0;
+                }
+                CpuidCompatibleCheck::Equal => {
+                    entry_compatible = src_vm_feature == dest_vm_feature;
+                }
+                CpuidCompatibleCheck::NumNotGreater => {
+                    entry_compatible = src_vm_feature <= dest_vm_feature;
+                }
+            };
+            if !entry_compatible {
+                error!(
+                    "Detected incompatible CPUID entry: leaf={:#02x} (subleaf={:#02x}), register='{:?}', \
+                    compatilbe_check='{:?}', source VM feature='{:#04x}', destination VM feature'{:#04x}'.",
+                    entry.function, entry.index, entry.feature_reg,
+                    entry.compatible_check, src_vm_feature, dest_vm_feature
+                    );
+
+                compatible = false;
+            }
+        }
+
+        if compatible {
+            info!("No CPU incompatibility detected.");
+            Ok(())
+        } else {
+            Err(Error::CpuidCheckCompatibility)
+        }
+    }
+}
+
 pub fn generate_common_cpuid(
    hypervisor: Arc<dyn hypervisor::Hypervisor>,
    topology: Option<(u8, u8, u8)>,
@@ -522,11 +741,12 @@ pub fn configure_vcpu(

    regs::setup_msrs(fd).map_err(Error::MsrsConfiguration)?;
    if let Some(kernel_entry_point) = kernel_entry_point {
-        // Safe to unwrap because this method is called after the VM is configured
-        regs::setup_regs(fd, kernel_entry_point.entry_addr.raw_value())
-            .map_err(Error::RegsConfiguration)?;
-        regs::setup_fpu(fd).map_err(Error::FpuConfiguration)?;
-        regs::setup_sregs(&vm_memory.memory(), fd).map_err(Error::SregsConfiguration)?;
+        if let Some(entry_addr) = kernel_entry_point.entry_addr {
+            // Safe to unwrap because this method is called after the VM is configured
+            regs::setup_regs(fd, entry_addr.raw_value()).map_err(Error::RegsConfiguration)?;
+            regs::setup_fpu(fd).map_err(Error::FpuConfiguration)?;
+            regs::setup_sregs(&vm_memory.memory(), fd).map_err(Error::SregsConfiguration)?;
+        }
    }
    interrupts::set_lint(fd).map_err(|e| Error::LocalIntConfiguration(e.into()))?;
    Ok(())
--- a/arch/src/x86_64/mptable.rs
+++ b/arch/src/x86_64/mptable.rs
@@ -35,7 +35,7 @@ struct MpcLintsrcWrapper(mpspec::mpc_lintsrc);
 #[derive(Copy, Clone, Default)]
 struct MpfIntelWrapper(mpspec::mpf_intel);

-// These `mpspec` wrapper types are only data, reading them from data is a safe initialization.
+// SAFETY: These `mpspec` wrapper types are only data, reading them from data is a safe initialization.
 unsafe impl ByteValued for MpcBusWrapper {}
 unsafe impl ByteValued for MpcCpuWrapper {}
 unsafe impl ByteValued for MpcIntsrcWrapper {}
--- a/arch/src/x86_64/smbios.rs
+++ b/arch/src/x86_64/smbios.rs
@@ -82,7 +82,6 @@ pub struct Smbios30Entrypoint {
    pub max_size: u32,
    pub physptr: u64,
 }
-unsafe impl ByteValued for Smbios30Entrypoint {}

 impl Clone for Smbios30Entrypoint {
    fn clone(&self) -> Self {
@@ -112,8 +111,6 @@ impl Clone for SmbiosBiosInfo {
    }
 }

-unsafe impl ByteValued for SmbiosBiosInfo {}
-
 #[repr(packed)]
 #[derive(Default, Copy)]
 pub struct SmbiosSysInfo {
@@ -136,6 +133,9 @@ impl Clone for SmbiosSysInfo {
    }
 }

+// SAFETY: These data structures only contain a series of integers
+unsafe impl ByteValued for Smbios30Entrypoint {}
+unsafe impl ByteValued for SmbiosBiosInfo {}
 unsafe impl ByteValued for SmbiosSysInfo {}

 fn write_and_incr<T: ByteValued>(
--- a/arch/src/x86_64/tdx/mod.rs
+++ b/arch/src/x86_64/tdx/mod.rs
@@ -25,6 +25,7 @@ pub enum TdvfError {

 // TDVF_DESCRIPTOR
 #[repr(packed)]
+#[derive(Default)]
 pub struct TdvfDescriptor {
    signature: [u8; 4],
    length: u32,
@@ -60,6 +61,57 @@ impl Default for TdvfSectionType {
    }
 }

+#[repr(C)]
+#[derive(Clone, Copy, Default, Debug)]
+pub struct TdVmmDataRegion {
+    pub start_address: u64,
+    pub length: u64,
+    pub region_type: TdVmmDataRegionType,
+}
+
+#[repr(u16)]
+#[derive(Clone, Copy, Debug)]
+pub enum TdVmmDataRegionType {
+    Signature = 0x0000,
+    InterfaceVersion = 0x0001,
+    SystemUuid = 0x0002,
+    RamSize = 0x0003,
+    GraphicsEnabled = 0x0004,
+    SmpCpuCount = 0x0005,
+    MachineId = 0x0006,
+    KernelAddress = 0x0007,
+    KernelSize = 0x0008,
+    KernelCommandLine = 0x0009,
+    InitrdAddress = 0x000a,
+    InitrdSize = 0x000b,
+    BootDevice = 0x000c,
+    NumaData = 0x000d,
+    BootMenu = 0x000e,
+    MaximumCpuCount = 0x000f,
+    KernelEntry = 0x0010,
+    KernelData = 0x0011,
+    InitrdData = 0x0012,
+    CommandLineAddress = 0x0013,
+    CommandLineSize = 0x0014,
+    CommandLineData = 0x0015,
+    KernelSetupAddress = 0x0016,
+    KernelSetupSize = 0x0017,
+    KernelSetupData = 0x0018,
+    FileDir = 0x0019,
+    AcpiTables = 0x8000,
+    SmbiosTables = 0x8001,
+    Irq0Override = 0x8002,
+    E820Table = 0x8003,
+    HpetData = 0x8004,
+    Reserved = 0xffff,
+}
+
+impl Default for TdVmmDataRegionType {
+    fn default() -> Self {
+        TdVmmDataRegionType::Reserved
+    }
+}
+
 pub fn parse_tdvf_sections(file: &mut File) -> Result<Vec<TdvfSection>, TdvfError> {
    // The 32-bit offset to the TDVF metadata is located 32 bytes from
    // the end of the file.
@@ -75,7 +127,7 @@ pub fn parse_tdvf_sections(file: &mut File) -> Result<Vec<TdvfSection>, TdvfErro
    file.seek(SeekFrom::Start(descriptor_offset))
        .map_err(TdvfError::ReadDescriptor)?;

-    let mut descriptor: TdvfDescriptor = unsafe { std::mem::zeroed() };
+    let mut descriptor: TdvfDescriptor = Default::default();
    // Safe as we read exactly the size of the descriptor header
    file.read_exact(unsafe {
        std::slice::from_raw_parts_mut(
@@ -120,6 +172,7 @@ pub fn parse_tdvf_sections(file: &mut File) -> Result<Vec<TdvfSection>, TdvfErro
 enum HobType {
    Handoff = 0x1,
    ResourceDescriptor = 0x3,
+    GuidExtension = 0x4,
    Unused = 0xfffe,
    EndOfHobList = 0xffff,
 }
@@ -137,7 +190,6 @@ struct HobHeader {
    length: u16,
    reserved: u32,
 }
-unsafe impl ByteValued for HobHeader {}

 #[repr(C)]
 #[derive(Copy, Clone, Default, Debug)]
@@ -151,7 +203,6 @@ struct HobHandoffInfoTable {
    efi_free_memory_bottom: u64,
    efi_end_of_hob_list: u64,
 }
-unsafe impl ByteValued for HobHandoffInfoTable {}

 #[repr(C)]
 #[derive(Copy, Clone, Default, Debug)]
@@ -172,7 +223,28 @@ struct HobResourceDescriptor {
    physical_start: u64,
    resource_length: u64,
 }
+
+#[repr(C)]
+#[derive(Copy, Clone, Default, Debug)]
+struct HobGuidType {
+    header: HobHeader,
+    name: EfiGuid,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Default, Debug)]
+struct TdVmmData {
+    guid_type: HobGuidType,
+    region: TdVmmDataRegion,
+}
+
+// SAFETY: These data structures only contain a series of integers
+unsafe impl ByteValued for TdVmmDataRegion {}
+unsafe impl ByteValued for HobHeader {}
+unsafe impl ByteValued for HobHandoffInfoTable {}
 unsafe impl ByteValued for HobResourceDescriptor {}
+unsafe impl ByteValued for HobGuidType {}
+unsafe impl ByteValued for TdVmmData {}

 pub struct TdHob {
    start_offset: u64,
@@ -303,6 +375,38 @@ impl TdHob {
            0x403,
        )
    }
+
+    pub fn add_td_vmm_data(
+        &mut self,
+        mem: &GuestMemoryMmap,
+        region: TdVmmDataRegion,
+    ) -> Result<(), TdvfError> {
+        let td_vmm_data = TdVmmData {
+            guid_type: HobGuidType {
+                header: HobHeader {
+                    r#type: HobType::GuidExtension,
+                    length: std::mem::size_of::<TdVmmData>() as u16,
+                    reserved: 0,
+                },
+                // TD_VMM_DATA_GUID CF2643E4-C0D3-46FF-0000-72EE623DDE38
+                name: EfiGuid {
+                    data1: 0xcf26_43e4,
+                    data2: 0xc0d3,
+                    data3: 0x46ff,
+                    data4: [0x00, 0x00, 0x72, 0xee, 0x62, 0x3d, 0xde, 0x38],
+                },
+            },
+            region,
+        };
+        info!(
+            "Writing HOB TD_VMM_DATA {:x} {:x?}",
+            self.current_offset, td_vmm_data
+        );
+        mem.write_obj(td_vmm_data, GuestAddress(self.current_offset))
+            .map_err(TdvfError::GuestMemoryWriteHob)?;
+        self.update_offset::<TdVmmData>();
+        Ok(())
+    }
 }

 #[cfg(test)]
--- a/block_util/Cargo.toml
+++ b/block_util/Cargo.toml
@@ -9,15 +9,17 @@ default = []
 io_uring = []

 [dependencies]
-io-uring = ">=0.4.0"
-libc = "0.2.98"
+io-uring = "0.5.2"
+libc = "0.2.108"
 log = "0.4.14"
 qcow = { path = "../qcow" }
-thiserror = "1.0"
+thiserror = "1.0.30"
 versionize = "0.1.6"
 versionize_derive = "0.1.4"
-virtio-bindings = { version = "0.1", features = ["virtio-v5_0_0"]}
-vm-memory = { version = "0.5.0", features = ["backend-mmap", "backend-atomic", "backend-bitmap"] }
+vhdx = { path = "../vhdx" }
+virtio-bindings = { version = "0.1.0", features = ["virtio-v5_0_0"] }
+virtio-queue = { path = "../virtio-queue" }
+vm-memory = { version = "0.6.0", features = ["backend-mmap", "backend-atomic", "backend-bitmap"] }
 vm-virtio = { path = "../vm-virtio" }
-vmm-sys-util = ">=0.3.1"
+vmm-sys-util = "0.9.0"

--- a/block_util/src/lib.rs
+++ b/block_util/src/lib.rs
@@ -18,6 +18,7 @@ pub mod qcow_sync;
 pub mod raw_async;
 pub mod raw_sync;
 pub mod vhd;
+pub mod vhdx_sync;

 use crate::async_io::{AsyncIo, AsyncIoError, AsyncIoResult, DiskFileError, DiskFileResult};
 #[cfg(feature = "io_uring")]
@@ -27,19 +28,17 @@ use std::convert::TryInto;
 use std::fs::File;
 use std::io::{self, IoSlice, IoSliceMut, Read, Seek, SeekFrom, Write};
 use std::os::linux::fs::MetadataExt;
-#[cfg(feature = "io_uring")]
-use std::os::unix::io::AsRawFd;
 use std::path::Path;
 use std::result;
 use std::sync::{Arc, Mutex};
 use versionize::{VersionMap, Versionize, VersionizeResult};
 use versionize_derive::Versionize;
 use virtio_bindings::bindings::virtio_blk::*;
+use virtio_queue::DescriptorChain;
 use vm_memory::{
    bitmap::AtomicBitmap, bitmap::Bitmap, ByteValued, Bytes, GuestAddress, GuestMemory,
-    GuestMemoryError,
+    GuestMemoryAtomic, GuestMemoryError,
 };
-use vm_virtio::DescriptorChain;
 use vmm_sys_util::eventfd::EventFd;

 type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
@@ -178,25 +177,32 @@ pub struct Request {

 impl Request {
    pub fn parse(
-        avail_desc: &DescriptorChain,
-        mem: &GuestMemoryMmap,
+        desc_chain: &mut DescriptorChain<GuestMemoryAtomic<GuestMemoryMmap>>,
    ) -> result::Result<Request, Error> {
+        let hdr_desc = desc_chain
+            .next()
+            .ok_or(Error::DescriptorChainTooShort)
+            .map_err(|e| {
+                error!("Missing head descriptor");
+                e
+            })?;
+
        // The head contains the request type which MUST be readable.
-        if avail_desc.is_write_only() {
+        if hdr_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)?,
+            request_type: request_type(desc_chain.memory(), hdr_desc.addr())?,
+            sector: sector(desc_chain.memory(), hdr_desc.addr())?,
            data_descriptors: Vec::new(),
            status_addr: GuestAddress(0),
            writeback: true,
        };

        let status_desc;
-        let mut desc = avail_desc
-            .next_descriptor()
+        let mut desc = desc_chain
+            .next()
            .ok_or(Error::DescriptorChainTooShort)
            .map_err(|e| {
                error!("Only head descriptor present: request = {:?}", req);
@@ -221,9 +227,9 @@ impl Request {
                if !desc.is_write_only() && req.request_type == RequestType::GetDeviceId {
                    return Err(Error::UnexpectedReadOnlyDescriptor);
                }
-                req.data_descriptors.push((desc.addr, desc.len));
-                desc = desc
-                    .next_descriptor()
+                req.data_descriptors.push((desc.addr(), desc.len()));
+                desc = desc_chain
+                    .next()
                    .ok_or(Error::DescriptorChainTooShort)
                    .map_err(|e| {
                        error!("DescriptorChain corrupted: request = {:?}", req);
@@ -238,11 +244,11 @@ impl Request {
            return Err(Error::UnexpectedReadOnlyDescriptor);
        }

-        if status_desc.len < 1 {
+        if status_desc.len() < 1 {
            return Err(Error::DescriptorLengthTooSmall);
        }

-        req.status_addr = status_desc.addr;
+        req.status_addr = status_desc.addr();

        Ok(req)
    }
@@ -403,8 +409,6 @@ pub struct VirtioBlockConfig {
    pub write_zeroes_may_unmap: u8,
    pub unused1: [u8; 3],
 }
-unsafe impl ByteValued for VirtioBlockConfig {}
-
 #[derive(Copy, Clone, Debug, Default, Versionize)]
 #[repr(C, packed)]
 pub struct VirtioBlockGeometry {
@@ -412,6 +416,9 @@ pub struct VirtioBlockGeometry {
    pub heads: u8,
    pub sectors: u8,
 }
+
+// SAFETY: these data structures only contain a series of integers
+unsafe impl ByteValued for VirtioBlockConfig {}
 unsafe impl ByteValued for VirtioBlockGeometry {}

 /// Check if io_uring for block device can be used on the current system, as
@@ -432,25 +439,6 @@ pub fn block_io_uring_is_supported() -> bool {

    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.
@@ -602,9 +590,11 @@ pub enum ImageType {
    FixedVhd,
    Qcow2,
    Raw,
+    Vhdx,
 }

 const QCOW_MAGIC: u32 = 0x5146_49fb;
+const VHDX_SIGN: u64 = 0x656C_6966_7864_6876;

 /// Determine image type through file parsing.
 pub fn detect_image_type(f: &mut File) -> std::io::Result<ImageType> {
@@ -623,6 +613,8 @@ pub fn detect_image_type(f: &mut File) -> std::io::Result<ImageType> {
        ImageType::Qcow2
    } else if vhd::is_fixed_vhd(f)? {
        ImageType::FixedVhd
+    } else if u64::from_le_bytes(s.data[0..8].try_into().unwrap()) == VHDX_SIGN {
+        ImageType::Vhdx
    } else {
        ImageType::Raw
    };
--- a/block_util/src/qcow_sync.rs
+++ b/block_util/src/qcow_sync.rs
@@ -4,7 +4,7 @@

 use crate::async_io::{AsyncIo, AsyncIoResult, DiskFile, DiskFileResult};
 use crate::{disk_size, fsync_sync, read_vectored_sync, write_vectored_sync};
-use qcow::{QcowFile, RawFile};
+use qcow::{QcowFile, RawFile, Result as QcowResult};
 use std::fs::File;
 use std::sync::{Arc, Mutex};
 use vmm_sys_util::eventfd::EventFd;
@@ -15,12 +15,11 @@ pub struct QcowDiskSync {
 }

 impl QcowDiskSync {
-    pub fn new(file: File, direct_io: bool) -> Self {
-        QcowDiskSync {
-            qcow_file: QcowFile::from(RawFile::new(file, direct_io))
-                .expect("Failed creating QcowFile"),
+    pub fn new(file: File, direct_io: bool) -> QcowResult<Self> {
+        Ok(QcowDiskSync {
+            qcow_file: QcowFile::from(RawFile::new(file, direct_io))?,
            semaphore: Arc::new(Mutex::new(())),
-        }
+        })
    }
 }

--- a/block_util/src/vhdx_sync.rs
+++ b/block_util/src/vhdx_sync.rs
@@ -0,0 +1,113 @@
+// Copyright © 2021 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+
+use crate::async_io::{AsyncIo, AsyncIoResult, DiskFile, DiskFileError, DiskFileResult};
+use crate::{fsync_sync, read_vectored_sync, write_vectored_sync};
+use std::fs::File;
+use std::ops::DerefMut;
+use std::sync::{Arc, Mutex};
+use vhdx::vhdx::{Result as VhdxResult, Vhdx};
+use vmm_sys_util::eventfd::EventFd;
+
+pub struct VhdxDiskSync {
+    vhdx_file: Arc<Mutex<Vhdx>>,
+    semaphore: Arc<Mutex<()>>,
+}
+
+impl VhdxDiskSync {
+    pub fn new(f: File) -> VhdxResult<Self> {
+        let vhdx = Vhdx::new(f)?;
+        let vhdx_file = Arc::new(Mutex::new(vhdx));
+
+        Ok(VhdxDiskSync {
+            vhdx_file,
+            semaphore: Arc::new(Mutex::new(())),
+        })
+    }
+}
+
+impl DiskFile for VhdxDiskSync {
+    fn size(&mut self) -> DiskFileResult<u64> {
+        Ok(self.vhdx_file.lock().unwrap().virtual_disk_size())
+    }
+
+    fn new_async_io(&self, _ring_depth: u32) -> DiskFileResult<Box<dyn AsyncIo>> {
+        Ok(Box::new(
+            VhdxSync::new(self.vhdx_file.clone(), self.semaphore.clone())
+                .map_err(DiskFileError::NewAsyncIo)?,
+        ) as Box<dyn AsyncIo>)
+    }
+}
+
+pub struct VhdxSync {
+    vhdx_file: Arc<Mutex<Vhdx>>,
+    eventfd: EventFd,
+    completion_list: Vec<(u64, i32)>,
+    semaphore: Arc<Mutex<()>>,
+}
+
+impl VhdxSync {
+    pub fn new(vhdx_file: Arc<Mutex<Vhdx>>, semaphore: Arc<Mutex<()>>) -> std::io::Result<Self> {
+        Ok(VhdxSync {
+            vhdx_file,
+            eventfd: EventFd::new(libc::EFD_NONBLOCK)?,
+            completion_list: Vec::new(),
+            semaphore,
+        })
+    }
+}
+
+impl AsyncIo for VhdxSync {
+    fn notifier(&self) -> &EventFd {
+        &self.eventfd
+    }
+
+    fn read_vectored(
+        &mut self,
+        offset: libc::off_t,
+        iovecs: Vec<libc::iovec>,
+        user_data: u64,
+    ) -> AsyncIoResult<()> {
+        read_vectored_sync(
+            offset,
+            iovecs,
+            user_data,
+            self.vhdx_file.lock().unwrap().deref_mut(),
+            &self.eventfd,
+            &mut self.completion_list,
+            &mut self.semaphore,
+        )
+    }
+
+    fn write_vectored(
+        &mut self,
+        offset: libc::off_t,
+        iovecs: Vec<libc::iovec>,
+        user_data: u64,
+    ) -> AsyncIoResult<()> {
+        write_vectored_sync(
+            offset,
+            iovecs,
+            user_data,
+            self.vhdx_file.lock().unwrap().deref_mut(),
+            &self.eventfd,
+            &mut self.completion_list,
+            &mut self.semaphore,
+        )
+    }
+
+    fn fsync(&mut self, user_data: Option<u64>) -> AsyncIoResult<()> {
+        fsync_sync(
+            user_data,
+            self.vhdx_file.lock().unwrap().deref_mut(),
+            &self.eventfd,
+            &mut self.completion_list,
+            &mut self.semaphore,
+        )
+    }
+
+    fn complete(&mut self) -> Vec<(u64, i32)> {
+        self.completion_list.drain(..).collect()
+    }
+}
--- a/devices/Cargo.toml
+++ b/devices/Cargo.toml
@@ -6,19 +6,19 @@ edition = "2018"

 [dependencies]
 acpi_tables = { path = "../acpi_tables", optional = true }
-anyhow = "1.0"
+anyhow = "1.0.51"
 arch = { path = "../arch" }
-bitflags = ">=1.2.1"
+bitflags = "1.3.2"
 byteorder = "1.4.3"
-epoll = ">=4.0.1"
-libc = "0.2.98"
+epoll = "4.3.1"
+libc = "0.2.108"
 log = "0.4.14"
 versionize = "0.1.6"
 versionize_derive = "0.1.4"
 vm-device = { path = "../vm-device" }
-vm-memory = "0.5.0"
+vm-memory = "0.6.0"
 vm-migration = { path = "../vm-migration" }
-vmm-sys-util = ">=0.3.1"
+vmm-sys-util = "0.9.0"

 [features]
 default = []
--- a/devices/src/acpi.rs
+++ b/devices/src/acpi.rs
@@ -34,14 +34,12 @@ impl AcpiShutdownDevice {
 impl BusDevice for AcpiShutdownDevice {
    // Spec has all fields as zero
    fn read(&mut self, _base: u64, _offset: u64, data: &mut [u8]) {
-        for i in data.iter_mut() {
-            *i = 0;
-        }
+        data.fill(0)
    }

    fn write(&mut self, _base: u64, _offset: u64, data: &[u8]) -> Option<Arc<Barrier>> {
        if data[0] == 1 {
-            debug!("ACPI Reboot signalled");
+            info!("ACPI Reboot signalled");
            if let Err(e) = self.reset_evt.write(1) {
                error!("Error triggering ACPI reset event: {}", e);
            }
@@ -51,7 +49,7 @@ impl BusDevice for AcpiShutdownDevice {
        const SLEEP_STATUS_EN_BIT: u8 = 5;
        const SLEEP_VALUE_BIT: u8 = 2;
        if data[0] == (S5_SLEEP_VALUE << SLEEP_VALUE_BIT) | (1 << SLEEP_STATUS_EN_BIT) {
-            debug!("ACPI Shutdown signalled");
+            info!("ACPI Shutdown signalled");
            if let Err(e) = self.exit_evt.write(1) {
                error!("Error triggering ACPI shutdown event: {}", e);
            }
@@ -62,7 +60,7 @@ impl BusDevice for AcpiShutdownDevice {

 /// A device for handling ACPI GED event generation
 pub struct AcpiGedDevice {
-    interrupt: Arc<Box<dyn InterruptSourceGroup>>,
+    interrupt: Arc<dyn InterruptSourceGroup>,
    notification_type: AcpiNotificationFlags,
    ged_irq: u32,
    address: GuestAddress,
@@ -70,7 +68,7 @@ pub struct AcpiGedDevice {

 impl AcpiGedDevice {
    pub fn new(
-        interrupt: Arc<Box<dyn InterruptSourceGroup>>,
+        interrupt: Arc<dyn InterruptSourceGroup>,
        ged_irq: u32,
        address: GuestAddress,
    ) -> AcpiGedDevice {
@@ -106,7 +104,7 @@ impl BusDevice for AcpiGedDevice {

 #[cfg(feature = "acpi")]
 impl Aml for AcpiGedDevice {
-    fn to_aml_bytes(&self) -> Vec<u8> {
+    fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
        aml::Device::new(
            "_SB_.GED_".into(),
            vec![
@@ -153,7 +151,7 @@ impl Aml for AcpiGedDevice {
                        &aml::And::new(&aml::Local(1), &aml::Local(0), &4usize),
                        &aml::If::new(
                            &aml::Equal::new(&aml::Local(1), &4usize),
-                            vec![&aml::MethodCall::new("\\_SB_.PCI0.PCNT".into(), vec![])],
+                            vec![&aml::MethodCall::new("\\_SB_.PHPR.PSCN".into(), vec![])],
                        ),
                        &aml::And::new(&aml::Local(1), &aml::Local(0), &8usize),
                        &aml::If::new(
@@ -167,7 +165,7 @@ impl Aml for AcpiGedDevice {
                ),
            ],
        )
-        .to_aml_bytes()
+        .append_aml_bytes(bytes)
    }
 }

@@ -191,6 +189,10 @@ impl Default for AcpiPmTimerDevice {

 impl BusDevice for AcpiPmTimerDevice {
    fn read(&mut self, _base: u64, _offset: u64, data: &mut [u8]) {
+        if data.len() != std::mem::size_of::<u32>() {
+            warn!("Invalid sized read of PM timer: {}", data.len());
+            return;
+        }
        let now = Instant::now();
        let since = now.duration_since(self.start);
        let nanos = since.as_nanos();
--- a/devices/src/gic.rs
+++ b/devices/src/gic.rs
@@ -26,7 +26,7 @@ pub const IRQ_LEGACY_COUNT: usize = 32;
 //   1. Move Gic*.rs from arch/ folder here.
 //   2. Move this file and ioapic.rs to arch/, as they are architecture specific.
 pub struct Gic {
-    interrupt_source_group: Arc<Box<dyn InterruptSourceGroup>>,
+    interrupt_source_group: Arc<dyn InterruptSourceGroup>,
    gic_device: Option<Arc<Mutex<Box<dyn GicDevice>>>>,
 }

--- a/devices/src/ioapic.rs
+++ b/devices/src/ioapic.rs
@@ -134,7 +134,7 @@ pub struct Ioapic {
    reg_entries: [RedirectionTableEntry; NUM_IOAPIC_PINS],
    used_entries: [bool; NUM_IOAPIC_PINS],
    apic_address: GuestAddress,
-    interrupt_source_group: Arc<Box<dyn InterruptSourceGroup>>,
+    interrupt_source_group: Arc<dyn InterruptSourceGroup>,
 }

 #[derive(Versionize)]
@@ -149,7 +149,10 @@ impl VersionMapped for IoapicState {}

 impl BusDevice for Ioapic {
    fn read(&mut self, _base: u64, offset: u64, data: &mut [u8]) {
-        assert!(data.len() == 4);
+        if data.len() != std::mem::size_of::<u32>() {
+            warn!("Invalid read size on IOAPIC: {}", data.len());
+            return;
+        }

        debug!("IOAPIC_R @ offset 0x{:x}", offset);

@@ -166,7 +169,10 @@ impl BusDevice for Ioapic {
    }

    fn write(&mut self, _base: u64, offset: u64, data: &[u8]) -> Option<Arc<Barrier>> {
-        assert!(data.len() == 4);
+        if data.len() != std::mem::size_of::<u32>() {
+            warn!("Invalid write size on IOAPIC: {}", data.len());
+            return None;
+        }

        debug!("IOAPIC_W @ offset 0x{:x}", offset);

@@ -226,6 +232,10 @@ impl Ioapic {
            IOAPIC_REG_ID => self.id_reg = (val >> 24) & 0xf,
            IOWIN_OFF..=REG_MAX_OFFSET => {
                let (index, is_high_bits) = decode_irq_from_selector(self.reg_sel as u8);
+                if index > NUM_IOAPIC_PINS {
+                    warn!("IOAPIC index out of range: {}", index);
+                    return;
+                }
                if is_high_bits {
                    self.reg_entries[index] &= 0xffff_ffff;
                    self.reg_entries[index] |= u64::from(val) << 32;
@@ -259,6 +269,10 @@ impl Ioapic {
            IOAPIC_REG_ID | IOAPIC_REG_ARBITRATION_ID => (self.id_reg & 0xf) << 24,
            IOWIN_OFF..=REG_MAX_OFFSET => {
                let (index, is_high_bits) = decode_irq_from_selector(self.reg_sel as u8);
+                if index > NUM_IOAPIC_PINS {
+                    warn!("IOAPIC index out of range: {}", index);
+                    return 0;
+                }
                if is_high_bits {
                    (self.reg_entries[index] >> 32) as u32
                } else {
--- a/devices/src/legacy/cmos.rs
+++ b/devices/src/legacy/cmos.rs
@@ -2,12 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

-use libc::{clock_gettime, gmtime_r, time_t, timespec, tm, CLOCK_REALTIME};
+use libc::{clock_gettime, gmtime_r, timespec, tm, CLOCK_REALTIME};
 use std::cmp::min;
 use std::mem;
 use std::sync::{Arc, Barrier};
 use vm_device::BusDevice;

+// https://github.com/rust-lang/libc/issues/1848
+#[cfg_attr(target_env = "musl", allow(deprecated))]
+use libc::time_t;
+
 const INDEX_MASK: u8 = 0x7f;
 const INDEX_OFFSET: u64 = 0x0;
 const DATA_OFFSET: u64 = 0x1;
@@ -47,13 +51,14 @@ impl Cmos {
 impl BusDevice for Cmos {
    fn write(&mut self, _base: u64, offset: u64, data: &[u8]) -> Option<Arc<Barrier>> {
        if data.len() != 1 {
+            warn!("Invalid write size on CMOS device: {}", data.len());
            return None;
        }

        match offset {
            INDEX_OFFSET => self.index = data[0] & INDEX_MASK,
            DATA_OFFSET => self.data[self.index as usize] = data[0],
-            o => panic!("bad write offset on CMOS device: {}", o),
+            o => warn!("bad write offset on CMOS device: {}", o),
        };
        None
    }
@@ -65,6 +70,7 @@ impl BusDevice for Cmos {
        }

        if data.len() != 1 {
+            warn!("Invalid read size on CMOS device: {}", data.len());
            return;
        }

@@ -85,6 +91,8 @@ impl BusDevice for Cmos {
                    let mut timespec: timespec = mem::zeroed();
                    clock_gettime(CLOCK_REALTIME, &mut timespec as *mut _);

+                    // https://github.com/rust-lang/libc/issues/1848
+                    #[cfg_attr(target_env = "musl", allow(deprecated))]
                    let now: time_t = timespec.tv_sec;
                    let mut tm: tm = mem::zeroed();
                    gmtime_r(&now, &mut tm as *mut _);
@@ -113,6 +121,9 @@ impl BusDevice for Cmos {
                    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,
+                    // Bit 0-6 are reserved and must be 0.
+                    // Bit 7 must be 1 (CMOS has power)
+                    0x0d => 1 << 7,
                    0x32 => to_bcd(((year + 1900) / 100) as u8),
                    _ => {
                        // self.index is always guaranteed to be in range via INDEX_MASK.
@@ -120,7 +131,10 @@ impl BusDevice for Cmos {
                    }
                }
            }
-            o => panic!("bad read offset on CMOS device: {}", o),
+            o => {
+                warn!("bad read offset on CMOS device: {}", o);
+                0
+            }
        }
    }
 }
--- a/devices/src/legacy/gpio_pl061.rs
+++ b/devices/src/legacy/gpio_pl061.rs
@@ -86,7 +86,7 @@ pub struct Gpio {
    // Mode Control Select Register
    afsel: u32,
    // GPIO irq_field
-    interrupt: Arc<Box<dyn InterruptSourceGroup>>,
+    interrupt: Arc<dyn InterruptSourceGroup>,
 }

 #[derive(Versionize)]
@@ -106,7 +106,7 @@ impl VersionMapped for GpioState {}

 impl Gpio {
    /// Constructs an PL061 GPIO device.
-    pub fn new(id: String, interrupt: Arc<Box<dyn InterruptSourceGroup>>) -> Self {
+    pub fn new(id: String, interrupt: Arc<dyn InterruptSourceGroup>) -> Self {
        Self {
            id,
            data: 0,
@@ -376,7 +376,7 @@ mod tests {
        let intr_evt = EventFd::new(libc::EFD_NONBLOCK).unwrap();
        let mut gpio = Gpio::new(
            String::from(GPIO_NAME),
-            Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
+            Arc::new(TestInterrupt::new(intr_evt.try_clone().unwrap())),
        );
        let mut data = [0; 4];

--- a/devices/src/legacy/i8042.rs
+++ b/devices/src/legacy/i8042.rs
@@ -34,7 +34,7 @@ impl BusDevice for I8042Device {

    fn write(&mut self, _base: u64, offset: u64, data: &[u8]) -> Option<Arc<Barrier>> {
        if data.len() == 1 && data[0] == 0xfe && offset == 3 {
-            debug!("i8042 reset signalled");
+            info!("i8042 reset signalled");
            if let Err(e) = self.reset_evt.write(1) {
                error!("Error triggering i8042 reset event: {}", e);
            }
--- a/devices/src/legacy/rtc_pl031.rs
+++ b/devices/src/legacy/rtc_pl031.rs
@@ -224,12 +224,12 @@ pub struct Rtc {
    load: u32,
    imsc: u32,
    ris: u32,
-    interrupt: Arc<Box<dyn InterruptSourceGroup>>,
+    interrupt: Arc<dyn InterruptSourceGroup>,
 }

 impl Rtc {
    /// Constructs an AMBA PL031 RTC device.
-    pub fn new(interrupt: Arc<Box<dyn InterruptSourceGroup>>) -> Self {
+    pub fn new(interrupt: Arc<dyn InterruptSourceGroup>) -> Self {
        Self {
            // This is used only for duration measuring purposes.
            previous_now: Instant::now(),
@@ -450,9 +450,7 @@ mod tests {
    fn test_rtc_read_write_and_event() {
        let intr_evt = EventFd::new(libc::EFD_NONBLOCK).unwrap();

-        let mut rtc = Rtc::new(Arc::new(Box::new(TestInterrupt::new(
-            intr_evt.try_clone().unwrap(),
-        ))));
+        let mut rtc = Rtc::new(Arc::new(TestInterrupt::new(intr_evt.try_clone().unwrap())));
        let mut data = [0; 4];

        // Read and write to the MR register.
--- a/devices/src/legacy/serial.rs
+++ b/devices/src/legacy/serial.rs
@@ -63,7 +63,7 @@ pub struct Serial {
    id: String,
    interrupt_enable: u8,
    interrupt_identification: u8,
-    interrupt: Arc<Box<dyn InterruptSourceGroup>>,
+    interrupt: Arc<dyn InterruptSourceGroup>,
    line_control: u8,
    line_status: u8,
    modem_control: u8,
@@ -91,7 +91,7 @@ impl VersionMapped for SerialState {}
 impl Serial {
    pub fn new(
        id: String,
-        interrupt: Arc<Box<dyn InterruptSourceGroup>>,
+        interrupt: Arc<dyn InterruptSourceGroup>,
        out: Option<Box<dyn io::Write + Send>>,
    ) -> Serial {
        Serial {
@@ -113,17 +113,21 @@ impl Serial {
    /// Constructs a Serial port ready for output.
    pub fn new_out(
        id: String,
-        interrupt: Arc<Box<dyn InterruptSourceGroup>>,
+        interrupt: Arc<dyn InterruptSourceGroup>,
        out: Box<dyn io::Write + Send>,
    ) -> Serial {
        Self::new(id, interrupt, Some(out))
    }

    /// Constructs a Serial port with no connected output.
-    pub fn new_sink(id: String, interrupt: Arc<Box<dyn InterruptSourceGroup>>) -> Serial {
+    pub fn new_sink(id: String, interrupt: Arc<dyn InterruptSourceGroup>) -> Serial {
        Self::new(id, interrupt, None)
    }

+    pub fn set_out(&mut self, out: Box<dyn io::Write + Send>) {
+        self.out = Some(out);
+    }
+
    /// Queues raw bytes for the guest to read and signals the interrupt if the line status would
    /// change.
    pub fn queue_input_bytes(&mut self, c: &[u8]) -> Result<()> {
@@ -134,6 +138,13 @@ impl Serial {
        Ok(())
    }

+    pub fn flush_output(&mut self) -> result::Result<(), io::Error> {
+        if let Some(out) = self.out.as_mut() {
+            out.flush()?;
+        }
+        Ok(())
+    }
+
    fn is_dlab_set(&self) -> bool {
        (self.line_control & LCR_DLAB_BIT) != 0
    }
@@ -370,7 +381,7 @@ mod tests {
        let serial_out = SharedBuffer::new();
        let mut serial = Serial::new_out(
            String::from(SERIAL_NAME),
-            Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
+            Arc::new(TestInterrupt::new(intr_evt.try_clone().unwrap())),
            Box::new(serial_out.clone()),
        );

@@ -390,7 +401,7 @@ mod tests {
        let serial_out = SharedBuffer::new();
        let mut serial = Serial::new_out(
            String::from(SERIAL_NAME),
-            Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
+            Arc::new(TestInterrupt::new(intr_evt.try_clone().unwrap())),
            Box::new(serial_out),
        );

@@ -427,7 +438,7 @@ mod tests {
        let intr_evt = EventFd::new(0).unwrap();
        let mut serial = Serial::new_sink(
            String::from(SERIAL_NAME),
-            Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
+            Arc::new(TestInterrupt::new(intr_evt.try_clone().unwrap())),
        );

        // write 1 to the interrupt event fd, so that read doesn't block in case the event fd
@@ -449,7 +460,7 @@ mod tests {
        let intr_evt = EventFd::new(0).unwrap();
        let mut serial = Serial::new_sink(
            String::from(SERIAL_NAME),
-            Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
+            Arc::new(TestInterrupt::new(intr_evt.try_clone().unwrap())),
        );

        serial.write(0, LCR as u64, &[LCR_DLAB_BIT]);
@@ -470,7 +481,7 @@ mod tests {
        let intr_evt = EventFd::new(0).unwrap();
        let mut serial = Serial::new_sink(
            String::from(SERIAL_NAME),
-            Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
+            Arc::new(TestInterrupt::new(intr_evt.try_clone().unwrap())),
        );

        serial.write(0, MCR as u64, &[MCR_LOOP_BIT]);
@@ -496,7 +507,7 @@ mod tests {
        let intr_evt = EventFd::new(0).unwrap();
        let mut serial = Serial::new_sink(
            String::from(SERIAL_NAME),
-            Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
+            Arc::new(TestInterrupt::new(intr_evt.try_clone().unwrap())),
        );

        serial.write(0, SCR as u64, &[0x12]);
--- a/devices/src/legacy/uart_pl011.rs
+++ b/devices/src/legacy/uart_pl011.rs
@@ -86,7 +86,7 @@ pub struct Pl011 {
    ifl: u32,
    read_count: u32,
    read_trigger: u32,
-    irq: Arc<Box<dyn InterruptSourceGroup>>,
+    irq: Arc<dyn InterruptSourceGroup>,
    out: Option<Box<dyn io::Write + Send>>,
 }

@@ -114,7 +114,7 @@ impl Pl011 {
    /// Constructs an AMBA PL011 UART device.
    pub fn new(
        id: String,
-        irq: Arc<Box<dyn InterruptSourceGroup>>,
+        irq: Arc<dyn InterruptSourceGroup>,
        out: Option<Box<dyn io::Write + Send>>,
    ) -> Self {
        Self {
@@ -138,6 +138,10 @@ impl Pl011 {
        }
    }

+    pub fn set_out(&mut self, out: Box<dyn io::Write + Send>) {
+        self.out = Some(out);
+    }
+
    fn state(&self) -> Pl011State {
        Pl011State {
            flags: self.flags,
@@ -192,6 +196,13 @@ impl Pl011 {
        Ok(())
    }

+    pub fn flush_output(&mut self) -> result::Result<(), io::Error> {
+        if let Some(out) = self.out.as_mut() {
+            out.flush()?;
+        }
+        Ok(())
+    }
+
    fn pl011_get_baudrate(&self) -> u32 {
        if self.fbrd == 0 {
            return 0;
@@ -440,7 +451,7 @@ mod tests {
        let pl011_out = SharedBuffer::new();
        let mut pl011 = Pl011::new(
            String::from(SERIAL_NAME),
-            Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
+            Arc::new(TestInterrupt::new(intr_evt.try_clone().unwrap())),
            Some(Box::new(pl011_out.clone())),
        );

@@ -460,7 +471,7 @@ mod tests {
        let pl011_out = SharedBuffer::new();
        let mut pl011 = Pl011::new(
            String::from(SERIAL_NAME),
-            Arc::new(Box::new(TestInterrupt::new(intr_evt.try_clone().unwrap()))),
+            Arc::new(TestInterrupt::new(intr_evt.try_clone().unwrap())),
            Some(Box::new(pl011_out)),
        );

--- a/docs/api.md
+++ b/docs/api.md
@@ -78,27 +78,29 @@ 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
-Add/remove memory from the VM      | `/vm.resize`        | `/schemas/VmResize`       | N/A                      | The VM is booted
-Add/remove memory from a zone      | `/vm.resize-zone`   | `/schemas/VmResizeZone`   | 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
+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
+Trigger power button of the VM     | `/vm.power-button`   | 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
+Add/remove memory from the VM      | `/vm.resize`         | `/schemas/VmResize`       | N/A                      | The VM is booted
+Add/remove memory from a zone      | `/vm.resize-zone`    | `/schemas/VmResizeZone`   | 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 userspace PCI device to the VM | `/vm.add-user-device`| `/schemas/VmAddUserDevice`| `/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

--- a/docs/arm64.md
+++ b/docs/arm64.md
@@ -1,10 +1,16 @@
 # How to build and test Cloud Hypervisor on AArch64

-This document introduces how to build and test Cloud Hypervisor on AArch64 servers. Currently Cloud Hypervisor cannot be tested on Raspberry PI. Because on AArch64, Cloud Hypervisor requires GICv3-ITS device for PCIe MSI interrupt handling. But GICv3-ITS has not been equipped on any Raspberry PI product so far.
+This document introduces how to build and test Cloud Hypervisor on AArch64
+servers. Currently Cloud Hypervisor cannot be tested on Raspberry PI. Because
+on AArch64, Cloud Hypervisor requires GICv3-ITS device for PCIe MSI interrupt
+handling. But GICv3-ITS has not been equipped on any Raspberry PI product so
+far.

-Now Cloud Hypervisor supports 2 ways of booting on AArch64: UEFI booting and direct-kernel booting. The document covers both of the ways.
+Now Cloud Hypervisor supports 2 ways of booting on AArch64: UEFI booting and
+direct-kernel booting. The document covers both of the ways.

-All the steps are based on Ubuntu. We use the Ubuntu cloud image for guest VM disk.
+All the steps are based on Ubuntu. We use the Ubuntu cloud image for guest VM
+disk.

 ## Getting started

@@ -82,19 +88,29 @@ $ build -a AARCH64 -t GCC5 -p ArmVirtPkg/ArmVirtCloudHv.dsc -b RELEASE
 $ popd
 ```

-If the build goes well, the EDK2 binary is available at `edk2/Build/ArmVirtCloudHv-AARCH64/RELEASE_GCC5/FV/CLOUDHV_EFI.fd`.
+If the build goes well, the EDK2 binary is available at
+`edk2/Build/ArmVirtCloudHv-AARCH64/RELEASE_GCC5/FV/CLOUDHV_EFI.fd`.

 ### Booting the guest VM

 ```bash
 $ pushd $CLOUDH
-$ sudo RUST_BACKTRACE=1 $CLOUDH/cloud-hypervisor/target/debug/cloud-hypervisor --api-socket /tmp/cloud-hypervisor.sock --kernel $CLOUDH/edk2/edk2/Build/ArmVirtCloudHv-AARCH64/RELEASE_GCC5/FV/CLOUDHV_EFI.fd --disk path=$CLOUDH/focal-server-cloudimg-arm64.raw --cpus boot=4 --memory size=4096M --serial tty --console off --log-file log.log -vvv --net tap=,mac=12:34:56:78:90:01,ip=192.168.1.1,mask=255.255.255.0
+$ sudo RUST_BACKTRACE=1 $CLOUDH/cloud-hypervisor/target/debug/cloud-hypervisor \
+           --api-socket /tmp/cloud-hypervisor.sock \
+           --kernel $CLOUDH/edk2/Build/ArmVirtCloudHv-AARCH64/RELEASE_GCC5/FV/CLOUDHV_EFI.fd \
+           --disk path=$CLOUDH/focal-server-cloudimg-arm64.raw \
+           --cpus boot=4 \
+           --memory size=4096M \
+           --net tap=,mac=12:34:56:78:90:01,ip=192.168.1.1,mask=255.255.255.0 \
+           --serial tty \
+           --console off
 $ popd
 ```

 ## Direct-kernel booting

-Alternativelly, you can build your own kernel for guest VM. This way, UEFI is not involved and ACPI cannot be enabled.
+Alternativelly, you can build your own kernel for guest VM. This way, UEFI is
+not involved and ACPI cannot be enabled.

 ### Building kernel

@@ -111,6 +127,15 @@ $ popd

 ```bash
 $ pushd $CLOUDH
-$ sudo $CLOUDH/cloud-hypervisor/target/debug/cloud-hypervisor --api-socket /tmp/cloud-hypervisor.sock --kernel $CLOUDH/linux/arch/arm64/boot/Image --disk path=focal-server-cloudimg-arm64.raw --cmdline "keep_bootcon console=ttyAMA0 reboot=k panic=1 root=/dev/vda1 rw" --cpus boot=4 --memory size=4096M --serial tty --console off --log-file log.log -vvv --net "tap=,mac=,ip=,mask="
+$ sudo $CLOUDH/cloud-hypervisor/target/debug/cloud-hypervisor \
+           --api-socket /tmp/cloud-hypervisor.sock \
+           --kernel $CLOUDH/linux/arch/arm64/boot/Image \
+           --disk path=focal-server-cloudimg-arm64.raw \
+           --cmdline "keep_bootcon console=ttyAMA0 reboot=k panic=1 root=/dev/vda1 rw" \
+           --cpus boot=4 \
+           --memory size=4096M \
+           --net tap=,mac=12:34:56:78:90:01,ip=192.168.1.1,mask=255.255.255.0 \
+           --serial tty \
+           --console off
 $ popd
 ```
--- a/docs/cpu.md
+++ b/docs/cpu.md
@@ -0,0 +1,189 @@
+# CPU
+
+Cloud Hypervisor has many options when it comes to the creation of virtual
+CPUs. This document aims to explain what Cloud Hypervisor is capable of and
+how it can be used to meet the needs of very different use cases.
+
+## Options
+
+`CpusConfig` or what is known as `--cpus` from the CLI perspective is the way
+to set vCPUs options for Cloud Hypervisor.
+
+```rust
+struct CpusConfig {
+    boot_vcpus: u8,
+    max_vcpus: u8,
+    topology: Option<CpuTopology>,
+    kvm_hyperv: bool,
+    max_phys_bits: u8,
+    affinity: Option<Vec<CpuAffinity>>,
+}
+```
+
+```
+--cpus boot=<boot_vcpus>,max=<max_vcpus>,topology=<threads_per_core>:<cores_per_die>:<dies_per_package>:<packages>,kvm_hyperv=on|off,max_phys_bits=<maximum_number_of_physical_bits>,affinity=<list_of_vcpus_with_their_associated_cpuset>
+```
+
+### `boot`
+
+Number of vCPUs present at boot time.
+
+This option allows to define a specific number of vCPUs to be present at the
+time the VM is started. This option is mandatory when using the `--cpus`
+parameter. If `--cpus` is not specified, this option takes the default value
+of `1`, starting the VM with a single vCPU.
+
+Value is an unsigned integer of 8 bits.
+
+_Example_
+
+```
+--cpus boot=2
+```
+
+### `max`
+
+Maximum number of vCPUs.
+
+This option defines the maximum number of vCPUs that can be assigned to the VM.
+In particular, this option is used when looking for CPU hotplug as it lets the
+provide an indication about how many vCPUs might be needed later during the
+runtime of the VM.
+For instance, if booting the VM with 2 vCPUs and a maximum of 6 vCPUs, it means
+up to 4 vCPUs can be added later at runtime by resizing the VM.
+
+The value must be greater than or equal to the number of boot vCPUs.
+The value is an unsigned integer of 8 bits.
+
+By default this option takes the value of `boot`, meaning vCPU hotplug is not
+expected and can't be performed.
+
+_Example_
+
+```
+--cpus max=3
+```
+
+### `topology`
+
+Topology of the guest platform.
+
+This option gives the user a way to describe the exact topology that should be
+exposed to the guest. It can be useful to describe to the guest the same
+topology found on the host as it allows for proper usage of the resources and
+is a way to achieve better performances.
+
+The topology is described through the following structure:
+
+```rust
+struct CpuTopology {
+    threads_per_core: u8,
+    cores_per_die: u8,
+    dies_per_package: u8,
+    packages: u8,
+}
+```
+
+or the following syntax through the CLI:
+
+```
+topology=<threads_per_core>:<cores_per_die>:<dies_per_package>:<packages>
+```
+
+By default the topology will be `1:1:1:1`.
+
+_Example_
+
+```
+--cpus boot=2,topology=1:1:2:1
+```
+
+### `kvm_hyperv`
+
+Enable KVM Hyper-V emulation.
+
+When turned on, this option relies on KVM to emulate the synthetic interrupt
+controller (SynIC) along with synthetic timers expected by a Windows guest.
+A Windows guest usually runs on top of Microsoft Hyper-V, therefore expects
+these synthetic devices to be present. That's why KVM provides a way to emulate
+them and avoids failures running a Windows guest with Cloud Hypervisor.
+
+By default this option is turned off.
+
+_Example_
+
+```
+--cpus kvm_hyperv=on
+```
+
+### `max_phys_bits`
+
+Maximum size for guest's addressable space.
+
+This option defines the maximum number of physical bits for all vCPUs, which
+sets a limit for the size of the guest's addressable space. This is mainly
+useful for debug purpose.
+
+The value is an unsigned integer of 8 bits.
+
+_Example_
+
+```
+--cpus max_phys_bits=40
+```
+
+### `affinity`
+
+Affinity of each vCPU.
+
+This option gives the user a way to provide the host CPU set associated with
+each vCPU. It is useful for achieving CPU pinning, ensuring multiple VMs won't
+affect the performance of each other. It might also be used in the context of
+NUMA as it is way of making sure the VM can run on a specific host NUMA node.
+In general, this option is used to increase the performances of a VM depending
+on the host platform and the type of workload running in the guest.
+
+The affinity is described through the following structure:
+
+```rust
+struct CpuAffinity {
+    vcpu: u8,
+    host_cpus: Vec<u8>,
+}
+```
+
+or the following syntax through the CLI:
+
+```
+affinity=[<vcpu_id1>@[<host_cpu_id1>, <host_cpu_id2>], <vcpu_id2>@[<host_cpu_id3>, <host_cpu_id4>]]
+```
+
+The outer brackets define the list of vCPUs. And for each vCPU, the inner
+brackets attached to `@` define the list of host CPUs the vCPU is allowed to
+run onto.
+
+Multiple values can be provided to define each list. Each value is an unsigned
+integer of 8 bits.
+
+For instance, if one needs to run vCPU 0 on host CPUs from 0 to 4, the syntax
+using `-` will help define a contiguous range with `affinity=0@[0-4]`. The
+same example could also be described with `affinity=0@[0,1,2,3,4]`.
+
+A combination of both `-` and `,` separators is useful when one might need to
+describe a list containing host CPUs from 0 to 99 and the host CPU 255, as it
+could simply be described with `affinity=0@[0-99,255]`.
+
+As soon as one tries to describe a list of values, `[` and `]` must be used to
+demarcate the list.
+
+By default each vCPU runs on the entire host CPU set.
+
+_Example_
+
+```
+--cpus boot=3,affinity=[0@[2,3],1@[0,1]]
+```
+
+In this example, assuming the host has 4 CPUs, vCPU 0 will run exclusively on
+host CPUs 2 and 3, while vCPU 1 will run exclusively on host CPUs 0 and 1.
+Because nothing is defined for vCPU 2, it can run on any of the 4 host CPUs.
--- a/docs/custom-image.md
+++ b/docs/custom-image.md
@@ -72,7 +72,7 @@ mount -t devpts devpts /dev/pts

 ### Install needed packages

-In the context Cloud-Hypervisor's integration tests, we need several utilities.
+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.

--- a/docs/fuzzing.md
+++ b/docs/fuzzing.md
@@ -20,10 +20,10 @@ cargo install cargo-fuzz

 ## Running the fuzzers

-e.g. To run the `qcow` fuzzer using all available CPUs:
+e.g. To run the `block` fuzzer using all available CPUs:

 ```
-cargo fuzz run qcow -j `nproc`
+cargo fuzz run block -j `nproc`
 ```

 ## Adding a new fuzzer
@@ -32,4 +32,4 @@ cargo fuzz run qcow -j `nproc`
 cargo fuzz add <new_fuzzer>
 ```

-Inspiration for fuzzers can be found in [crosvm](https://chromium.googlesource.com/chromiumos/platform/crosvm/+/refs/heads/master/fuzz/)
+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
@@ -1,6 +1,6 @@
 # Cloud Hypervisor Hot Plug

-Currently Cloud Hypervisor only support hot plugging of CPU devices.
+Currently Cloud Hypervisor only supports hot plugging of CPU devices.

 ## Kernel support

@@ -9,7 +9,7 @@ or by using this kernel patch (available in 5.5-rc1 and later): https://git.kern

 ## CPU Hot Plug

-Extra vCPUs can be added and removed from a running Cloud Hypervisor instance. This is controlled by two mechanisms:
+Extra vCPUs can be added and removed from a running `cloud-hypervisor` instance. This is controlled by two mechanisms:

 1. Specifying a number of maximum potential vCPUs that is greater than the number of default (boot) vCPUs.
 2. Making a HTTP API request to the VMM to ask for the additional vCPUs to be added.
@@ -65,7 +65,7 @@ As per adding CPUs to the guest, after a reboot the VM will be running with the

 ### ACPI method

-Extra memory can be added from a running Cloud Hypervisor instance. This is controlled by two mechanisms:
+Extra memory can be added from a running `cloud-hypervisor` instance. This is controlled by two mechanisms:

 1. Allocating some of the guest physical address space for hotplug memory.
 2. Making a HTTP API request to the VMM to ask for a new amount of RAM to be assigned to the VM. In the case of expanding the memory for the VM the new memory will be hotplugged into the running VM, if reducing the size of the memory then change will take effect after the next reboot.
@@ -157,7 +157,9 @@ The same API can also be used to reduce the desired RAM for a VM. It is importan

 ## PCI Device Hot Plug

-Extra PCI devices can be added and removed from a running Cloud Hypervisor instance. This is controlled by making a HTTP API request to the VMM to ask for the additional device to be added, or for the existing device to be removed.
+Extra PCI devices can be added and removed from a running `cloud-hypervisor` instance. This is controlled by making a HTTP API request to the VMM to ask for the additional device to be added, or for the existing device to be removed.
+
+Note: On AArch64 platform, PCI device hotplug can only be achieved using ACPI. Please refer to the [documentation](arm64.md#uefi-booting) for more information.

 To use PCI device hotplug start the VM with the HTTP server.

--- a/docs/intel_sgx.md
+++ b/docs/intel_sgx.md
@@ -1,7 +1,7 @@
 # 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
+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
@@ -17,12 +17,12 @@ For more information about SGX, please refer to the [SGX Homepage](https://softw
 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
+## Cloud Hypervisor support

 Assuming the host exposes `/dev/sgx_vepc`, we can pass SGX enclaves through
 the guest.

-In order to use SGX enclaves within a Cloud-Hypervisor VM, we must define one
+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.
--- a/docs/intel_tdx.md
+++ b/docs/intel_tdx.md
@@ -0,0 +1,75 @@
+# Intel TDX
+
+Intel® Trust Domain Extensions (Intel® TDX) is an Intel technology designed to
+isolate virtual machines from the VMM, hypervisor and any other software on the
+host platform.
+
+For more information about TDX technical aspects, design and specification
+please refer to the
+[TDX Homepage](https://www.intel.com/content/www/us/en/developer/articles/technical/intel-trust-domain-extensions.html).
+
+The required Linux changes for the host side can be found in the
+[KVM TDX tree](https://github.com/intel/tdx/tree/kvm) while the changes for
+the guest side can be found in the [Guest TDX tree](https://github.com/intel/tdx/tree/guest).
+
+The TDVF firmware can be found in the
+[EDK2 staging project](https://github.com/tianocore/edk2-staging/tree/TDVF).
+
+## Cloud Hypervisor support
+
+First, you must be running on a machine with TDX enabled in hardware, and
+with the host OS compiled from the [KVM TDX tree](https://github.com/intel/tdx/tree/kvm).
+
+Cloud Hypervisor can run TDX VM (Trust Domain) by loading the TDVF firmware,
+which will then load the guest kernel from the image. The image must be custom
+as it must include a kernel built from the [Guest TDX tree](https://github.com/intel/tdx/tree/guest).
+The firmware can be built as follows:
+
+```bash
+git clone https://github.com/tianocore/edk2-staging.git
+cd edk2-staging
+git checkout origin/TDVF
+git submodule update --init --recursive
+make -C BaseTools
+source ./edksetup.sh
+build -p OvmfPkg/OvmfCh.dsc -a X64 -t GCC5 -b RELEASE
+```
+
+If debug logs are needed, here is the alternative command:
+
+```bash
+build -p OvmfPkg/OvmfCh.dsc -a X64 -t GCC5 -D DEBUG_ON_SERIAL_PORT=TRUE
+```
+
+On the Cloud Hypervisor side, all you need is to build the project with the
+`tdx` feature enabled:
+
+```bash
+cargo build --features tdx
+```
+
+And run a TDX VM by providing the firmware previously built, along with the
+guest image containing the TDX enlightened kernel. Assuming the guest kernel
+command line contains `console=hvc0` (printing to the `virtio-console` device),
+run Cloud Hypervisor as follows:
+
+```bash
+./cloud-hypervisor \
+    --tdx firmware=edk2-staging/Build/OvmfCh/RELEASE_GCC5/FV/OVMF.fd \
+    --cpus boot=1 \
+    --memory size=1G \
+    --disk path=tdx_guest_img
+```
+
+And here is the alternative command when looking for debug logs (assuming the
+guest kernel command line contains `console=ttyS0`):
+
+```bash
+./cloud-hypervisor \
+    --tdx firmware=edk2-staging/Build/OvmfCh/DEBUG_GCC5/FV/OVMF.fd \
+    --cpus boot=1 \
+    --memory size=1G \
+    --disk path=tdx_guest_img \
+    --serial tty \
+    --console off
+```
--- a/docs/iommu.md
+++ b/docs/iommu.md
@@ -121,6 +121,29 @@ lspci
 00:04.0 Unassigned class [ffff]: Red Hat, Inc. Virtio RNG
 ```

+### Work with FDT on AArch64
+
+On AArch64 architecture, the virtual IOMMU can still be used even if ACPI is not
+enabled. But the effect is different with what the aforementioned test showed.
+
+When ACPI is disabled, virtual IOMMU is supported through Flattened Device Tree
+(FDT). In this case, the guest kernel can not tell which device should be
+IOMMU-attached and which should not. No matter how many devices you attached to
+the virtual IOMMU by setting `iommu=on` option, all the devices on the PCI bus
+will be attached to the virtual IOMMU (except the IOMMU itself). Each of the
+devices will be added into a IOMMU group.
+
+As a result, the directory content of `/sys/kernel/iommu_groups` would be:
+
+```bash
+ls /sys/kernel/iommu_groups/0/devices/
+0000:00:02.0
+ls /sys/kernel/iommu_groups/1/devices/
+0000:00:03.0
+ls /sys/kernel/iommu_groups/2/devices/
+0000:00:04.0
+```
+
 ## Faster mappings

 By default, the guest memory is mapped with 4k pages and no huge pages, which
--- a/docs/live_migration.md
+++ b/docs/live_migration.md
@@ -36,7 +36,7 @@ $ target/release/ch-remote --api-socket=/tmp/api1 send-migration unix:/tmp/sock

 When the above commands completed, the source VM should be successfully
 migrated to the destination VM. Now the destination VM is running while
-the source VM is paused.
+the source VM is terminated gracefully.

 ## Nested-VM Migration

@@ -136,4 +136,4 @@ vm-1:~$ sudo ./ch-remote --api-socket=/tmp/api1 send-migration unix:/tmp/sock1
 When the above commands completed, the source VM should be successfully
 migrated to the destination VM without interrupting our testing guest
 workload. Now the destination VM is running the testing guest workload
-while the source VM is paused.
+while the source VM is terminated gracefully.
--- a/docs/memory.md
+++ b/docs/memory.md
@@ -1,30 +1,31 @@
 # Memory

-Cloud-Hypervisor has many ways to expose memory to the guest VM. This document
-aims to explain what Cloud-Hypervisor is capable of and how it can be used to
+Cloud Hypervisor has many ways to expose memory to the guest VM. This document
+aims to explain what Cloud Hypervisor is capable of and how it can be used to
 meet the needs of very different use cases.

 ## Basic Parameters

 `MemoryConfig` or what is known as `--memory` from the CLI perspective is the
-easiest way to get started with Cloud-Hypervisor.
+easiest way to get started with Cloud Hypervisor.

 ```rust
 struct MemoryConfig {
    size: u64,
    mergeable: bool,
-    shared: bool,
-    hugepages: bool,
-    hugepage_size: Option<u64>,
    hotplug_method: HotplugMethod,
    hotplug_size: Option<u64>,
    hotplugged_size: Option<u64>,
+    shared: bool,
+    hugepages: bool,
+    hugepage_size: Option<u64>,
+    prefault: bool,
    zones: Option<Vec<MemoryZoneConfig>>,
 }
 ```

 ```
--memory <memory>	Memory parameters "size=<guest_memory_size>,mergeable=on|off,shared=on|off,hugepages=on|off,hotplug_method=acpi|virtio-mem,hotplug_size=<hotpluggable_memory_size>,hotplugged_size=<hotplugged_memory_size>"
+--memory <memory>	Memory parameters "size=<guest_memory_size>,mergeable=on|off,shared=on|off,hugepages=on|off,hugepage_size=<hugepage_size>,hotplug_method=acpi|virtio-mem,hotplug_size=<hotpluggable_memory_size>,hotplugged_size=<hotplugged_memory_size>,prefault=on|off" [default: size=512M]
 ```

 ### `size`
@@ -59,44 +60,6 @@ _Example_
 --memory size=1G,mergeable=on
 ```

-### `shared`
-
-Specifies if the memory must be `mmap(2)` with `MAP_SHARED` flag.
-
-By sharing a memory mapping, one can share the guest RAM with other processes
-running on the host. One can use this option when running vhost-user devices
-as part of the VM device model, as they will be driven by standalone daemons
-needing access to the guest RAM content.
-
-By default this option is turned off, which results in performing `mmap(2)`
-with `MAP_PRIVATE` flag.
-
-_Example_
-
-```
--memory size=1G,shared=on
-```
-
-### `hugepages` and `hugepage_size`
-
-Specifies if the memory must be created and `mmap(2)` with `MAP_HUGETLB` and size
-flags. This performs a memory mapping relying on the specified huge page size. If no huge page size is supplied the system's default huge page size is used.
-
-By using hugepages, one can improve the overall performance of the VM, assuming
-the guest will allocate hugepages as well. Another interesting use case is VFIO
-as it speeds up the VM's boot time since the amount of IOMMU mappings are
-reduced.
-
-The user is responsible for ensuring there are sufficient huge pages of the specified size for the VMM to use. Failure to do so may result in strange VMM behaviour.
-
-By default this option is turned off.
-
-_Example_
-
-```
--memory size=1G,hugepages=on,hugepage_size=2M
-```
-
 ### `hotplug_method`

 Selects the way of adding and/or removing memory to/from a booted VM.
@@ -142,6 +105,72 @@ _Example_
 --memory size=1G,hotplug_method=virtio-mem,hotplug_size=1G,hotplugged_size=512M
 ```

+### `shared`
+
+Specifies if the memory must be `mmap(2)` with `MAP_SHARED` flag.
+
+By sharing a memory mapping, one can share the guest RAM with other processes
+running on the host. One can use this option when running vhost-user devices
+as part of the VM device model, as they will be driven by standalone daemons
+needing access to the guest RAM content.
+
+By default this option is turned off, which results in performing `mmap(2)`
+with `MAP_PRIVATE` flag.
+
+_Example_
+
+```
+--memory size=1G,shared=on
+```
+
+### `hugepages` and `hugepage_size`
+
+Specifies if the memory must be created and `mmap(2)` with `MAP_HUGETLB` and size
+flags. This performs a memory mapping relying on the specified huge page size.
+If no huge page size is supplied the system's default huge page size is used.
+
+By using hugepages, one can improve the overall performance of the VM, assuming
+the guest will allocate hugepages as well. Another interesting use case is VFIO
+as it speeds up the VM's boot time since the amount of IOMMU mappings are
+reduced.
+
+The user is responsible for ensuring there are sufficient huge pages of the
+specified size for the VMM to use. Failure to do so may result in strange VMM
+behaviour, e.g. error with `ReadKernelImage` is common. If there is a strange
+error with `hugepages` enabled, just disable it or check whether there are enough
+huge pages.
+
+By default this option is turned off.
+
+_Example_
+
+```
+--memory size=1G,hugepages=on,hugepage_size=2M
+```
+
+### `prefault`
+
+Specifies if the memory must be `mmap(2)` with `MAP_POPULATE` flag.
+
+By triggering prefault, one can allocate all required physical memory and create
+its page tables while calling `mmap`. With physical memory allocated, the number
+of page faults will decrease during running, and performance will also improve.
+
+Note that boot of VM will be slower with `prefault` enabled because of allocating
+physical memory and creating page tables in advance, and physical memory of the
+specified size will be consumed quickly.
+
+This option only takes effect at boot of VM. There is also a `prefault` option in
+restore and its choice will overwrite `prefault` in memory.
+
+By default this option is turned off.
+
+_Example_
+
+```
+--memory size=1G,prefault=on
+```
+
 ## Advanced Parameters

 `MemoryZoneConfig` or what is known as `--memory-zone` from the CLI perspective
@@ -155,14 +184,16 @@ struct MemoryZoneConfig {
    file: Option<PathBuf>,
    shared: bool,
    hugepages: bool,
+    hugepage_size: Option<u64>,
    host_numa_node: Option<u32>,
    hotplug_size: Option<u64>,
    hotplugged_size: Option<u64>,
+    prefault: bool,
 }
 ```

 ```
--memory-zone <memory-zone>	User defined memory zone parameters "size=<guest_memory_region_size>,file=<backing_file>,shared=on|off,hugepages=on|off,host_numa_node=<node_id>,id=<zone_identifier>,hotplug_size=<hotpluggable_memory_size>,hotplugged_size=<hotplugged_memory_size>"
+--memory-zone <memory-zone>	User defined memory zone parameters "size=<guest_memory_region_size>,file=<backing_file>,shared=on|off,hugepages=on|off,hugepage_size=<hugepage_size>,host_numa_node=<node_id>,id=<zone_identifier>,hotplug_size=<hotpluggable_memory_size>,hotplugged_size=<hotplugged_memory_size>,prefault=on|off"
 ```

 This parameter expects one or more occurences, allowing for a list of memory
@@ -250,24 +281,30 @@ _Example_
 --memory-zone id=mem0,size=1G,shared=on
 ```

-### `hugepages`
+### `hugepages` and `hugepage_size`

-Specifies if the memory zone must be `mmap(2)` with `MAP_HUGETLB` and
-`MAP_HUGE_2MB` flags. This performs a memory zone mapping relying on 2MiB
-pages instead of the default 4kiB pages.
+Specifies if the memory must be created and `mmap(2)` with `MAP_HUGETLB` and size
+flags. This performs a memory mapping relying on the specified huge page size.
+If no huge page size is supplied the system's default huge page size is used.

 By using hugepages, one can improve the overall performance of the VM, assuming
 the guest will allocate hugepages as well. Another interesting use case is VFIO
 as it speeds up the VM's boot time since the amount of IOMMU mappings are
 reduced.

+The user is responsible for ensuring there are sufficient huge pages of the
+specified size for the VMM to use. Failure to do so may result in strange VMM
+behaviour, e.g. error with `ReadKernelImage` is common. If there is a strange
+error with `hugepages` enabled, just disable it or check whether there are enough
+huge pages.
+
 By default this option is turned off.

 _Example_

 ```
 --memory size=0
--memory-zone id=mem0,size=1G,hugepages=on
+--memory-zone id=mem0,size=1G,hugepages=on,hugepage_size=2M
 ```

 ### `host_numa_node`
@@ -334,6 +371,30 @@ _Example_
 --memory-zone id=mem0,size=1G,hotplug_size=1G,hotplugged_size=512M
 ```

+### `prefault`
+
+Specifies if the memory must be `mmap(2)` with `MAP_POPULATE` flag.
+
+By triggering prefault, one can allocate all required physical memory and create
+its page tables while calling `mmap`. With physical memory allocated, the number
+of page faults will decrease during running, and performance will also improve.
+
+Note that boot of VM will be slower with `prefault` enabled because of allocating
+physical memory and creating page tables in advance, and physical memory of the
+specified size will be consumed quickly.
+
+This option only takes effect at boot of VM. There is also a `prefault` option in
+restore and its choice will overwrite `prefault` in memory.
+
+By default this option is turned off.
+
+_Example_
+
+```
+--memory size=0
+--memory-zone id=mem0,size=1G,prefault=on
+```
+
 ## NUMA settings

 `NumaConfig` or what is known as `--numa` from the CLI perspective has been
@@ -385,17 +446,20 @@ integer of 8 bits.

 For instance, if one needs to attach all CPUs from 0 to 4 to a specific node,
 the syntax using `-` will help define a contiguous range with `cpus=0-4`. The
-same example could also be described with `cpus=0:1:2:3:4`.
+same example could also be described with `cpus=[0,1,2,3,4]`.

-A combination of both `-` and `:` separators is useful when one might need to
+A combination of both `-` and `,` separators is useful when one might need to
 describe a list containing all CPUs from 0 to 99 and the CPU 255, as it could
-simply be described with `cpus=0-99:255`.
+simply be described with `cpus=[0-99,255]`.
+
+As soon as one tries to describe a list of values, `[` and `]` must be used to
+demarcate the list.

 _Example_

 ```
 --cpus boot=8
--numa guest_numa_id=0,cpus=1-3:7 guest_numa_id=1,cpus=0:4-6
+--numa guest_numa_id=0,cpus=[1-3,7] guest_numa_id=1,cpus=[0,4-6]
 ```

 ### `distances`
@@ -412,7 +476,10 @@ node. The second value is an unsigned integer of 8 bits as it represents the
 distance between the current NUMA node and the destination NUMA node. The two
 values are separated by `@` (`value1@value2`), meaning the destination NUMA
 node `value1` is located at a distance of `value2`. Each tuple is separated
-from the others with `:` separator.
+from the others with `,` separator.
+
+As soon as one tries to describe a list of values, `[` and `]` must be used to
+demarcate the list.

 For instance, if one wants to define 3 NUMA nodes, with each node located at
 different distances, it can be described with the following example.
@@ -420,7 +487,7 @@ different distances, it can be described with the following example.
 _Example_

 ```
--numa guest_numa_id=0,distances=1@15:2@25 guest_numa_id=1,distances=0@15:2@20 guest_numa_id=2,distances=0@25:1@20
+--numa guest_numa_id=0,distances=[1@15,2@25] guest_numa_id=1,distances=[0@15,2@20] guest_numa_id=2,distances=[0@25,1@20]
 ```

 ### `memory_zones`
@@ -437,14 +504,21 @@ workload run more efficiently.

 Multiple values can be provided to define the list. Each value is a string
 referring to an existing memory zone identifier. Values are separated from
-each other with the `:` separator.
+each other with the `,` separator.
+
+As soon as one tries to describe a list of values, `[` and `]` must be used to
+demarcate the list.
+
+Note that a memory zone must belong to a single NUMA node. The following
+configuration is incorrect, therefore not allowed:
+`--numa guest_numa_id=0,memory_zones=mem0 guest_numa_id=1,memory_zones=mem0`

 _Example_

 ```
 --memory size=0
 --memory-zone id=mem0,size=1G id=mem1,size=1G id=mem2,size=1G
--numa guest_numa_id=0,memory_zones=mem0:mem2 guest_numa_id=1,memory_zones=mem1
+--numa guest_numa_id=0,memory_zones=[mem0,mem2] guest_numa_id=1,memory_zones=mem1
 ```

 ### `sgx_epc_sections`
@@ -455,13 +529,16 @@ which must be seen by the guest as belonging to the NUMA node `guest_numa_id`.

 Multiple values can be provided to define the list. Each value is a string
 referring to an existing SGX EPC section identifier. Values are separated from
-each other with the `:` separator.
+each other with the `,` separator.
+
+As soon as one tries to describe a list of values, `[` and `]` must be used to
+demarcate the list.

 _Example_

 ```
 --sgx-epc id=epc0,size=32M id=epc1,size=64M id=epc2,size=32M
--numa guest_numa_id=0,sgx_epc_sections=epc1 guest_numa_id=1,sgx_epc_sections=epc0:epc2
+--numa guest_numa_id=0,sgx_epc_sections=epc1 guest_numa_id=1,sgx_epc_sections=[epc0,epc2]
 ```

 ### PCI bus
@@ -469,4 +546,4 @@ _Example_
 Cloud Hypervisor supports only one PCI bus, which is why it has been tied to
 the NUMA node 0 by default. It is the user responsibility to organize the NUMA
 nodes correctly so that vCPUs and guest RAM which should be located on the same
-NUMA node as the PCI bus end up on the NUMA node 0.
+NUMA node as the PCI bus end up on the NUMA node 0.
--- a/docs/snapshot_restore.md
+++ b/docs/snapshot_restore.md
@@ -11,9 +11,9 @@ 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
+## Snapshot a Cloud Hypervisor VM

-First thing, we must run a Cloud-Hypervisor VM:
+First thing, we must run a Cloud Hypervisor VM:

 ```bash
 ./cloud-hypervisor \
@@ -54,7 +54,7 @@ drwxr-xr-x 47 foo bar       4096 Jul 22 11:47 ../
 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 distinct memory regions to be created. Each memory
+Cloud Hypervisor needs 2 distinct 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.
@@ -65,7 +65,7 @@ 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 occurred.

-## Restore a Cloud-Hypervisor VM
+## 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 
--- a/docs/uefi.md
+++ b/docs/uefi.md
@@ -41,19 +41,20 @@ CSM is a module that allows to boot legacy operating systems using the OVMF firm

 ```shell
 sudo apt-get update
-sudo apt-get install uuid-dev nasm iasl build-essential python3-distutils git
+sudo apt-get install uuid-dev nasm iasl build-essential python3-distutils git libncurses-dev

-git checkout https://github.com/cloud-hypervisor/seabios -b ch
+git clone https://github.com/cloud-hypervisor/seabios -b ch
 cd seabios
 make menuconfig
 # Enable `CONFIG_CSM` and `CONFIG_QEMU_HARDWARE`
+# Please make sure `python` is in your path
 make CONFIG_CSM=y CONFIG_QEMU_HARDWARE=y
 cd ..

 git clone https://github.com/cloud-hypervisor/edk2 -b ch
 cd edk2
 . edksetup.sh
-git submodule update --init
+git submodule update --init --recursive
 cp ../seabios/out/Csm16.bin OvmfPkg/Csm/Csm16/

 echo "ACTIVE_PLATFORM=OvmfPkg/OvmfCh.dsc" >> Conf/target.txt
@@ -61,7 +62,7 @@ echo "TARGET_ARCH=X64" >> Conf/target.txt
 echo "TOOL_CHAIN_TAG=GCC5" >> Conf/target.txt

 make -C ./BaseTools
-build
+build -DCSM_ENABLE

 ```

--- a/docs/vfio-user.md
+++ b/docs/vfio-user.md
@@ -0,0 +1,79 @@
+# Cloud Hypervisor VFIO-user HOWTO
+
+VFIO-user is an *experimental* protocol for allowing devices to be implemented in another process and communicate over a socket; ie.e VFIO-user is to VFIO as virtio is to vhost-user.
+
+The protocol is documented here: https://github.com/nutanix/libvfio-user/blob/master/docs/vfio-user.rst
+
+The Cloud Hypervisor support for such devices is *experimental*. Not all Cloud Hypervisor functionality is supported in particular: virtio-mem and iommu are not supported.
+
+## Usage
+
+The `--user-device socket=<path>` parameter is used to create a vfio-user device when creating the VM specifying the socket to connect to. The device can also be hotplugged with `ch-remote add-user-device socket=<path>`.
+
+## Example (GPIO device)
+
+There is a simple GPIO device included in the libvfio-user repository: https://github.com/nutanix/libvfio-user#gpio
+
+Run the example from the libvfio-user repository:
+
+```sh
+rm /tmp/vfio-user.sock
+./build/dbg/samples/gpio-pci-idio-16 -v /tmp/vfio-user.sock &
+```
+
+Start Cloud Hypervisor:
+
+```sh
+target/debug/cloud-hypervisor \
+    --memory size=1G,shared=on \
+    --disk path=~/images/focal-server-cloudimg-amd64.raw \
+    --kernel ~/src/linux/vmlinux \
+    --cmdline "root=/dev/vda1 console=hvc0" \
+    --user-device socket=/tmp/vfio-user.sock 
+```
+
+Inside the VM you can test the device with:
+
+```sh
+cat /sys/class/gpio/gpiochip480/base > /sys/class/gpio/export
+for ((i=0;i<12;i++)); do cat /sys/class/gpio/OUT0/value; done
+```
+
+## Example (NVMe device)
+
+Use SPDK: https://github.com/spdk/spdk
+
+Compile with `./configure --with-vfio-user`
+
+Create an NVMe controller listening on a vfio-user socket with a simple AIO block device in spdk.
+More details of configuring SPDK bdev can be viewed in [SPDK bdev](https://spdk.io/doc/bdev.html).
+More details of setting SPDK NVMe-oF target can be viewed in [SDPK NVMe-oF tgt](https://spdk.io/doc/nvmf.html).
+
+```sh
+sudo scripts/setup.sh
+rm ~/images/test-disk.raw
+truncate ~/images/test-disk.raw -s 128M
+mkfs.ext4  ~/images/test-disk.raw
+sudo killall ./build/bin/nvmf_tgt
+sudo ./build/bin/nvmf_tgt -i 0 -e 0xFFFF -m 0x1 &
+sleep 2
+sudo ./scripts/rpc.py nvmf_create_transport -t VFIOUSER
+sudo rm -rf /tmp/nvme-vfio-user
+sudo mkdir -p /tmp/nvme-vfio-user
+sudo ./scripts/rpc.py bdev_aio_create ~/images/test-disk.raw test 512
+sudo ./scripts/rpc.py nvmf_create_subsystem nqn.2019-07.io.spdk:cnode -a -s test
+sudo ./scripts/rpc.py nvmf_subsystem_add_ns nqn.2019-07.io.spdk:cnode test
+sudo ./scripts/rpc.py nvmf_subsystem_add_listener nqn.2019-07.io.spdk:cnode -t VFIOUSER -a /tmp/nvme-vfio-user -s 0
+sudo chown $USER.$USER -R /tmp/nvme-vfio-user
+```
+
+Start Cloud Hypervisor:
+
+```sh
+target/debug/cloud-hypervisor \
+    --memory size=1G,shared=on \
+    --disk path=~/images/focal-server-cloudimg-amd64.raw \
+    --kernel ~/src/linux/vmlinux \
+    --cmdline "root=/dev/vda1 console=hvc0" \
+    --user-device socket=/tmp/nvme-vfio-user/cntrl 
+```
--- a/docs/vfio.md
+++ b/docs/vfio.md
@@ -36,14 +36,22 @@ Now that we have identified the device, we must unbind it from its native driver
 First we add VFIO support to the host:

 ```
-$ sudo modprobe vfio_pci
-$ sudo modprobe vfio_iommu_type1 allow_unsafe_interrupts
+# modprobe -r vfio_pci
+# modprobe -r vfio_iommu_type1
+# modprobe vfio_iommu_type1 allow_unsafe_interrupts
+# modprobe vfio_pci
+```
+
+In case the VFIO drivers are built-in, enable unsafe interrupts with:
+
+```
+# echo 1 > /sys/module/vfio_iommu_type1/parameters/allow_unsafe_interrupts
 ```

 Then we unbind it from its native driver:

 ```
-$ echo 0000:01:00.0 > /sys/bus/pci/devices/0000\:01\:00.0/driver/unbind
+# echo 0000:01:00.0 > /sys/bus/pci/devices/0000\:01\:00.0/driver/unbind
 ```

 And finally we bind it to the VFIO driver. To do that we first need to get the
@@ -53,8 +61,14 @@ device's VID (Vendor ID) and PID (Product ID):
 $ lspci -n -s 01:00.0
 01:00.0 ff00: 10ec:525a (rev 01)

-$ echo 10ec 525a > /sys/bus/pci/drivers/vfio-pci/new_id
-$ echo 0000:01:00.0 > /sys/bus/pci/drivers/vfio-pci/bind
+# echo 10ec 525a > /sys/bus/pci/drivers/vfio-pci/new_id
+```
+
+If you have more than one device with the same `vendorID`/`deviceID`, starting
+with the second device, the binding is performed as follows:
+
+```
+# echo 0000:02:00.0 > /sys/bus/pci/drivers/vfio-pci/bind
 ```

 Now the device is managed by the VFIO framework.
@@ -79,3 +93,33 @@ takes the device's sysfs path as an argument. In our example it is
 The guest kernel will then detect the card reader on its PCI bus and provided
 that support for this device is enabled, it will probe and enable it for the
 guest to use.
+
+In case you want to pass multiple devices, here is the correct syntax:
+
+```
+--device path=/sys/bus/pci/devices/0000:01:00.0/ path=/sys/bus/pci/devices/0000:02:00.0/
+```
+
+### Multiple devices in the same IOMMU group
+
+There are cases where multiple devices can be found under the same IOMMU group.
+This happens often with graphics card embedding an audio controller.
+
+```
+$ lspci
+[...]
+01:00.0 VGA compatible controller: NVIDIA Corporation GK208B [GeForce GT 710] (rev a1)
+01:00.1 Audio device: NVIDIA Corporation GK208 HDMI/DP Audio Controller (rev a1)
+[...]
+```
+
+This is usually exposed as follows through `sysfs`:
+
+```
+$ ls /sys/kernel/iommu_groups/22/devices/
+0000:01:00.0  0000:01:00.1
+```
+
+This means these two devices are under the same IOMMU group 22. In such case,
+it is important to bind both devices to VFIO and pass them both through the
+VM, otherwise this could cause some functional and security issues.
--- a/docs/vhost-user-blk-testing.md
+++ b/docs/vhost-user-blk-testing.md
@@ -69,12 +69,16 @@ make
 ```

 ### Set the SPDK environment
+
+Run SPDK vhost target with 2 CPU cores, i.e., core 0 and 1.
 ```bash
 sudo HUGEMEM=2048 scripts/setup.sh
 sudo ./build/bin/vhost -S /var/tmp -s 1024 -m 0x3 &
 ```

 ### Create 512M block device
+
+Create a 512M (first parameter) block device with 512 bytes (second parameter) block size.
 ```bash
 sudo scripts/rpc.py bdev_malloc_create 512 512 -b Malloc0
 sudo scripts/rpc.py vhost_create_blk_controller --cpumask 0x1 vhost.1 Malloc0
--- a/docs/windows.md
+++ b/docs/windows.md
@@ -30,15 +30,15 @@ This step currently requires QEMU to install Windows onto the guest. QEMU is onl
 Preparing several command parts as these will be used in the follow up sections as well.

 ```shell
-IMG_FILE=windows-disk.qcow
+IMG_FILE=windows-disk.raw
 WIN_ISO_FILE=en_windows_server_version_2004_updated_may_2020_x64_dvd_1e7f1cfa.iso
 VIRTIO_ISO_FILE=virtio-win-0.1.185.iso
 OVMF_DIR=./FV
 ```

-Create an empty image file, `qcow` or `raw` is supported.
+Create an empty image file, `raw` is supported.
 ```shell
-qemu-img create -f qcow2 $IMG_FILE 30G
+qemu-img create -f raw $IMG_FILE 30G
 ```

 Begin the Windows installation process under QEMU
@@ -221,7 +221,7 @@ qemu-system-x86_64 \
 	-m 4G \
 	-cdrom ./$WIN_ISO_FILE \
 	-drive file=./$VIRTIO_ISO_FILE,index=0,media=cdrom
-	-drive if=none,id=root,file=./windbg-disk.qcow \
+	-drive if=none,id=root,file=./windbg-disk.raw \
 	-device virtio-blk-pci,drive=root,disable-legacy=on \
 	-device virtio-net-pci,netdev=mynet0,disable-legacy=on \
 	-netdev user,id=mynet0,net=192.168.178.0/24,host=192.168.178.1,dhcpstart=192.168.178.64,hostname=windbg-host \
@@ -280,7 +280,7 @@ qemu-system-x86_64 \
 	-cpu host \
 	-smp 1 \
 	-m 4G \
-	-drive if=none,id=root,file=./windbg-disk.qcow \
+	-drive if=none,id=root,file=./windbg-disk.raw \
 	-device virtio-blk-pci,drive=root,disable-legacy=on \
 	-serial tcp::4445,server,nowait \
 	-device virtio-net-pci,netdev=mynet0,disable-legacy=on \
--- a/event_monitor/Cargo.toml
+++ b/event_monitor/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["The Cloud Hypervisor Authors"]
 edition = "2018"

 [dependencies]
-libc = "0.2.98"
-serde = {version = ">=1.0.27", features = ["rc"] }
-serde_derive = ">=1.0.27"
-serde_json = ">=1.0.9"
+libc = "0.2.108"
+serde = { version = "1.0.130", features = ["rc"] }
+serde_derive = "1.0.130"
+serde_json = "1.0.72"
--- a/fuzz/Cargo.lock
+++ b/fuzz/Cargo.lock
@@ -11,18 +11,18 @@ dependencies = [

 [[package]]
 name = "ansi_term"
-version = "0.11.0"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
 dependencies = [
 "winapi",
 ]

 [[package]]
 name = "anyhow"
-version = "1.0.42"
+version = "1.0.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "595d3cfa7a60d4555cb5067b99f07142a08ea778de5cf993f7b75c7d8fabc486"
+checksum = "8b26702f315f53b6071259e15dd9d64528213b44d61de1ec926eca7715d62203"

 [[package]]
 name = "api_client"
@@ -33,15 +33,15 @@ dependencies = [

 [[package]]
 name = "arbitrary"
-version = "1.0.1"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "237430fd6ed3740afe94eefcc278ae21e050285be882804e0d6e8695f0c94691"
+checksum = "510c76ecefdceada737ea728f4f9a84bd2e1ef29f1ba555e560940fe279954de"

 [[package]]
 name = "arc-swap"
-version = "1.3.0"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e906254e445520903e7fc9da4f709886c84ae4bc4ddaf0e093188d66df4dc820"
+checksum = "c5d78ce20460b82d3fa150275ed9d55e21064fc7951177baacf86a145c4a4b1f"

 [[package]]
 name = "arch"
@@ -56,6 +56,7 @@ dependencies = [
 "linux-loader",
 "log",
 "serde",
+ "serde_derive",
 "thiserror",
 "versionize",
 "versionize_derive",
@@ -87,9 +88,9 @@ dependencies = [

 [[package]]
 name = "bitflags"
-version = "1.2.1"
+version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"

 [[package]]
 name = "block_util"
@@ -102,7 +103,9 @@ dependencies = [
 "thiserror",
 "versionize",
 "versionize_derive",
+ "vhdx",
 "virtio-bindings",
+ "virtio-queue",
 "vm-memory",
 "vm-virtio",
 "vmm-sys-util",
@@ -116,9 +119,9 @@ checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"

 [[package]]
 name = "cc"
-version = "1.0.69"
+version = "1.0.72"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e70cc2f62c6ce1868963827bd677764c62d07c3d9a3e1fb1177ee1a9ab199eb2"
+checksum = "22a9137b95ea06864e018375b72adfb7db6e6f68cfc8df5a04d00288050485ee"

 [[package]]
 name = "cfg-if"
@@ -128,9 +131,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"

 [[package]]
 name = "clap"
-version = "2.33.3"
+version = "2.34.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37e58ac78573c40708d45522f0d80fa2f01cc4f9b4e2bf749807255454312002"
+checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
 dependencies = [
 "ansi_term",
 "atty",
@@ -144,7 +147,7 @@ dependencies = [

 [[package]]
 name = "cloud-hypervisor"
-version = "16.0.0"
+version = "19.0.0"
 dependencies = [
 "anyhow",
 "api_client",
@@ -155,7 +158,7 @@ dependencies = [
 "libc",
 "log",
 "option_parser",
- "seccomp",
+ "seccompiler",
 "serde_json",
 "signal-hook",
 "thiserror",
@@ -173,13 +176,24 @@ dependencies = [
 "libc",
 "libfuzzer-sys",
 "qcow",
- "seccomp",
+ "seccompiler",
+ "vhdx",
 "virtio-devices",
+ "virtio-queue",
 "vm-memory",
 "vm-virtio",
 "vmm-sys-util",
 ]

+[[package]]
+name = "crc32c"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "210cdf933e6a81212bfabf90cd8762f471b5922e5f6b709547673ad8e04b9448"
+dependencies = [
+ "rustc_version",
+]
+
 [[package]]
 name = "crc64"
 version = "1.0.0"
@@ -232,6 +246,17 @@ version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b643857cf70949306b81d7e92cb9d47add673868edac9863c4a49c42feaf3f1e"

+[[package]]
+name = "getrandom"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fcd999463524c52659517fe2cea98493cfe485d10565e7b0fb07dbba7ad2753"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
 [[package]]
 name = "hermit-abi"
 version = "0.1.19"
@@ -262,9 +287,9 @@ dependencies = [

 [[package]]
 name = "iced-x86"
-version = "1.13.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94ef7eabb0e712d4f12aea976b2deb876739dc70fd787df3876c75c9b7bcf0be"
+checksum = "46e977036f7f5139d580c7f19ad62df9cb8ebd8410bb569e73585226be80a86f"
 dependencies = [
 "lazy_static",
 "static_assertions",
@@ -272,9 +297,9 @@ dependencies = [

 [[package]]
 name = "io-uring"
-version = "0.5.1"
+version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb82832e05cc4ca298f198a8db108837b4f7b7b1248e3cba8e48f151aece80cf"
+checksum = "8d75829ed9377bab6c90039fe47b9d84caceb4b5063266142e21bcce6550cda8"
 dependencies = [
 "bitflags",
 "libc",
@@ -282,14 +307,14 @@ dependencies = [

 [[package]]
 name = "itoa"
-version = "0.4.7"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd25036021b0de88a0aff6b850051563c6516d0bf53f8638938edbb9de732736"
+checksum = "b71991ff56294aa922b450139ee08b3bfc70982c6b2c7562771375cf73542dd4"

 [[package]]
 name = "kvm-bindings"
-version = "0.4.0"
-source = "git+https://github.com/cloud-hypervisor/kvm-bindings?branch=ch-v0.4.0#1a68725639283e622f4bb64584885b30bfe8be44"
+version = "0.5.0"
+source = "git+https://github.com/cloud-hypervisor/kvm-bindings?branch=ch-v0.5.0#9c497710ba9968d8efe15dbae03991b16cf82e23"
 dependencies = [
 "serde",
 "serde_derive",
@@ -298,9 +323,9 @@ dependencies = [

 [[package]]
 name = "kvm-ioctls"
-version = "0.9.0"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2924454e22895c738e43331ae310459c74a11ded9c97dc250129ee10d2f9ca2"
+checksum = "97422ba48d7ffb66fd4d18130f72ab66f9bbbf791fb7a87b9291cdcfec437593"
 dependencies = [
 "kvm-bindings",
 "libc",
@@ -315,9 +340,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"

 [[package]]
 name = "libc"
-version = "0.2.98"
+version = "0.2.108"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "320cfe77175da3a483efed4bc0adc1968ca050b098ce4f2f1c13a56626128790"
+checksum = "8521a1b57e76b1ec69af7599e75e38e7b7fad6610f037db8c79b127201b5d119"

 [[package]]
 name = "libfuzzer-sys"
@@ -332,9 +357,9 @@ dependencies = [

 [[package]]
 name = "linux-loader"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c819cc8275b0f2c1ed9feec455ca288b45d82932384a6a5f7a86812ee3427459"
+checksum = "8a5e77493808403a6bd56a301a64ea6b9342e36ea845044bf0dfdf56fe52fa08"
 dependencies = [
 "vm-memory",
 ]
@@ -351,7 +376,7 @@ dependencies = [
 [[package]]
 name = "micro_http"
 version = "0.1.0"
-source = "git+https://github.com/firecracker-microvm/micro-http?branch=main#9b605a8b61df602cda62076d30d9f70307ea336f"
+source = "git+https://github.com/firecracker-microvm/micro-http?branch=main#9517a300370a158a7af0996b7eebf040d171e1a4"
 dependencies = [
 "libc",
 "vmm-sys-util",
@@ -369,6 +394,7 @@ name = "net_util"
 version = "0.1.0"
 dependencies = [
 "epoll",
+ "getrandom",
 "libc",
 "log",
 "net_gen",
@@ -377,6 +403,7 @@ dependencies = [
 "versionize",
 "versionize_derive",
 "virtio-bindings",
+ "virtio-queue",
 "vm-memory",
 "vm-virtio",
 "vmm-sys-util",
@@ -401,10 +428,12 @@ dependencies = [
 "hypervisor",
 "libc",
 "log",
+ "thiserror",
 "versionize",
 "versionize_derive",
 "vfio-bindings",
 "vfio-ioctls",
+ "vfio_user",
 "vm-allocator",
 "vm-device",
 "vm-memory",
@@ -414,9 +443,9 @@ dependencies = [

 [[package]]
 name = "proc-macro2"
-version = "1.0.27"
+version = "1.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0d8caf72986c1a598726adc988bb5984792ef84f5ee5aa50209145ee8077038"
+checksum = "ba508cc11742c0dc5c1659771673afbab7a0efab23aa17e854cbab0837ed0b43"
 dependencies = [
 "unicode-xid",
 ]
@@ -434,9 +463,9 @@ dependencies = [

 [[package]]
 name = "quote"
-version = "1.0.9"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3d0b9745dc2debf507c8422de05d7226cc1f0644216dfdfead988f9b1ab32a7"
+checksum = "38bc8cc6a5f2e3655e0899c1b848643b2562f853f114bfec7be120678e3ace05"
 dependencies = [
 "proc-macro2",
 ]
@@ -462,30 +491,55 @@ dependencies = [
 ]

 [[package]]
-name = "ryu"
-version = "1.0.5"
+name = "rustc_version"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
+checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+dependencies = [
+ "semver",
+]

 [[package]]
-name = "seccomp"
-version = "0.1.0"
-source = "git+https://github.com/firecracker-microvm/firecracker?tag=v0.24.4#8f44986a0e956a77f2b2324c12f73bec16130c82"
+name = "ryu"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c9613b5a66ab9ba26415184cfc41156594925a9cf3a2057e57f31ff145f6568"
+
+[[package]]
+name = "seccompiler"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e01d1292a1131b22ccea49f30bd106f1238b5ddeec1a98d39268dcc31d540e68"
 dependencies = [
 "libc",
 ]

 [[package]]
-name = "serde"
-version = "1.0.126"
+name = "semver"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec7505abeacaec74ae4778d9d9328fe5a5d04253220a85c4ee022239fc996d03"
+checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+dependencies = [
+ "semver-parser",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+
+[[package]]
+name = "serde"
+version = "1.0.130"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f12d06de37cf59146fbdecab66aa99f9fe4f78722e3607577a5375d66bd0c913"

 [[package]]
 name = "serde_derive"
-version = "1.0.126"
+version = "1.0.130"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "963a7dbc9895aeac7ac90e74f34a5d5261828f79df35cbed41e10189d3804d43"
+checksum = "d7bc1a1ab1961464eae040d96713baa5a724a8152c1222492465b54322ec508b"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -494,9 +548,9 @@ dependencies = [

 [[package]]
 name = "serde_json"
-version = "1.0.64"
+version = "1.0.72"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "799e97dc9fdae36a5c8b8f2cae9ce2ee9fdce2058c57a93e6099d919fd982f79"
+checksum = "d0ffa0837f2dfa6fb90868c2b5468cad482e175f7dad97e7421951e663f2b527"
 dependencies = [
 "itoa",
 "ryu",
@@ -505,9 +559,9 @@ dependencies = [

 [[package]]
 name = "signal-hook"
-version = "0.3.9"
+version = "0.3.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "470c5a6397076fae0094aaf06a08e6ba6f37acb77d3b1b91ea92b4d6c8650c39"
+checksum = "9c98891d737e271a2954825ef19e46bd16bdb98e2746f2eec4f7a4ef7946efd1"
 dependencies = [
 "libc",
 "signal-hook-registry",
@@ -536,9 +590,9 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"

 [[package]]
 name = "syn"
-version = "1.0.74"
+version = "1.0.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1873d832550d4588c3dbc20f01361ab00bfe741048f71e3fecf145a7cc18b29c"
+checksum = "8daf5dd0bb60cbd4137b1b587d2fc0ae729bc07cf01cd70b36a1ed5ade3b9d59"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -567,18 +621,18 @@ dependencies = [

 [[package]]
 name = "thiserror"
-version = "1.0.26"
+version = "1.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93119e4feac1cbe6c798c34d3a53ea0026b0b1de6a120deef895137c0529bfe2"
+checksum = "854babe52e4df1653706b98fcfc05843010039b406875930a70e4d9644e5c417"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "1.0.26"
+version = "1.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "060d69a0afe7796bf42e9e2ff91f5ee691fb15c53d38b4b62a9a53eb23164745"
+checksum = "aa32fd3f627f367fe16f893e2597ae3c05020f8bba2666a4e6ea73d377e5714b"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -587,9 +641,9 @@ dependencies = [

 [[package]]
 name = "unicode-width"
-version = "0.1.8"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
+checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"

 [[package]]
 name = "unicode-xid"
@@ -602,6 +656,9 @@ name = "uuid"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bc5cf98d8186244414c848017f0e2676b3fcb46807f6668a97dfe67359a3c4b7"
+dependencies = [
+ "getrandom",
+]

 [[package]]
 name = "vec_map"
@@ -648,7 +705,7 @@ dependencies = [
 [[package]]
 name = "vfio-ioctls"
 version = "0.1.0"
-source = "git+https://github.com/rust-vmm/vfio-ioctls?branch=master#9b84069e9f419c5369b9a313859cac7e9828d331"
+source = "git+https://github.com/rust-vmm/vfio-ioctls?branch=main#8f7f2210ebe71660938b05b2ed7eec9253478bc5"
 dependencies = [
 "byteorder",
 "kvm-bindings",
@@ -660,12 +717,44 @@ dependencies = [
 ]

 [[package]]
-name = "vhost"
+name = "vfio_user"
 version = "0.1.0"
-source = "git+https://github.com/rust-vmm/vhost?branch=master#9982541776a603d30556a06df55e8c0491072763"
+dependencies = [
+ "anyhow",
+ "libc",
+ "log",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "thiserror",
+ "vfio-bindings",
+ "vm-memory",
+ "vmm-sys-util",
+]
+
+[[package]]
+name = "vhdx"
+version = "0.1.0"
+dependencies = [
+ "byteorder",
+ "crc32c",
+ "libc",
+ "log",
+ "remain",
+ "thiserror",
+ "uuid",
+ "vmm-sys-util",
+]
+
+[[package]]
+name = "vhost"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d23ddeb452fb4f837526c6298cc8a2f4948e5595b0328a3d61b5eebe51874d7"
 dependencies = [
 "bitflags",
 "libc",
+ "vm-memory",
 "vmm-sys-util",
 ]

@@ -692,7 +781,7 @@ dependencies = [
 "net_util",
 "pci",
 "rate_limiter",
- "seccomp",
+ "seccompiler",
 "serde",
 "serde_derive",
 "serde_json",
@@ -700,6 +789,7 @@ dependencies = [
 "versionize_derive",
 "vhost",
 "virtio-bindings",
+ "virtio-queue",
 "vm-allocator",
 "vm-device",
 "vm-memory",
@@ -708,6 +798,15 @@ dependencies = [
 "vmm-sys-util",
 ]

+[[package]]
+name = "virtio-queue"
+version = "0.1.0"
+dependencies = [
+ "log",
+ "vm-memory",
+ "vmm-sys-util",
+]
+
 [[package]]
 name = "vm-allocator"
 version = "0.1.0"
@@ -734,12 +833,13 @@ dependencies = [
 [[package]]
 name = "vm-fdt"
 version = "0.1.0"
-source = "git+https://github.com/rust-vmm/vm-fdt?branch=master#13ab882e2f8387753064351c69fbe35c422b448b"
+source = "git+https://github.com/rust-vmm/vm-fdt?branch=main#720e48e435b791ec6cbe8d2b229448b71dcb1ab9"

 [[package]]
 name = "vm-memory"
-version = "0.5.0"
-source = "git+https://github.com/rust-vmm/vm-memory?rev=5bd7138758183a73ac0da27ce40c004d95f1a7e9#5bd7138758183a73ac0da27ce40c004d95f1a7e9"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a8ebcb86ca457f9d6e14cf97009f679952eba42f0113de5db596e514cd0e43b"
 dependencies = [
 "arc-swap",
 "libc",
@@ -766,6 +866,7 @@ version = "0.1.0"
 dependencies = [
 "log",
 "virtio-bindings",
+ "virtio-queue",
 "vm-memory",
 ]

@@ -793,7 +894,7 @@ dependencies = [
 "option_parser",
 "pci",
 "qcow",
- "seccomp",
+ "seccompiler",
 "serde",
 "serde_derive",
 "serde_json",
@@ -803,7 +904,10 @@ dependencies = [
 "versionize",
 "versionize_derive",
 "vfio-ioctls",
+ "vfio_user",
+ "vhdx",
 "virtio-devices",
+ "virtio-queue",
 "vm-allocator",
 "vm-device",
 "vm-memory",
@@ -814,9 +918,9 @@ dependencies = [

 [[package]]
 name = "vmm-sys-util"
-version = "0.8.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01cf11afbc4ebc0d5c7a7748a77d19e2042677fc15faa2f4ccccb27c18a60605"
+checksum = "733537bded03aaa93543f785ae997727b30d1d9f4a03b7861d23290474242e11"
 dependencies = [
 "bitflags",
 "libc",
@@ -824,6 +928,12 @@ dependencies = [
 "serde_derive",
 ]

+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -10,21 +10,22 @@ cargo-fuzz = true

 [dependencies]
 block_util = { path = "../block_util" }
-libc = "0.2.98"
+libc = "0.2.108"
 libfuzzer-sys = "0.4.2"
 qcow = { path = "../qcow" }
-seccomp = { git = "https://github.com/firecracker-microvm/firecracker", tag = "v0.24.4" }
+seccompiler = "0.2.0"
+vhdx = { path = "../vhdx" }
 virtio-devices = { path = "../virtio-devices" }
-vmm-sys-util = "0.8.0"
+virtio-queue = { path = "../virtio-queue" }
+vmm-sys-util = "0.9.0"
 vm-virtio = { path = "../vm-virtio" }
-vm-memory = "0.5.0"
+vm-memory = "0.6.0"

 [dependencies.cloud-hypervisor]
 path = ".."

 [patch.crates-io]
-kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch-v0.4.0", features = ["with-serde", "fam-wrappers"] }
-vm-memory = { git = "https://github.com/rust-vmm/vm-memory", rev = "5bd7138758183a73ac0da27ce40c004d95f1a7e9"}
+kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch-v0.5.0", features = ["with-serde", "fam-wrappers"] }
 versionize_derive = { git = "https://github.com/cloud-hypervisor/versionize_derive", branch = "ch" }

 # Prevent this from interfering with workspaces
@@ -42,3 +43,9 @@ name = "block"
 path = "fuzz_targets/block.rs"
 test = false
 doc = false
+
+[[bin]]
+name = "vhdx"
+path = "fuzz_targets/vhdx.rs"
+test = false
+doc = false
--- a/fuzz/fuzz_targets/block.rs
+++ b/fuzz/fuzz_targets/block.rs
@@ -4,9 +4,9 @@

 #![no_main]

-use block_util::{async_io::DiskFile, qcow_sync::QcowDiskSync};
+use block_util::{async_io::DiskFile, raw_sync::RawFileDiskSync};
 use libfuzzer_sys::fuzz_target;
-use seccomp::SeccompAction;
+use seccompiler::SeccompAction;
 use std::ffi;
 use std::fs::File;
 use std::io::{self, Cursor, Read, Seek, SeekFrom};
@@ -15,9 +15,11 @@ 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;
+use virtio_queue::{Queue, QueueState};
+use vm_memory::{bitmap::AtomicBitmap, Bytes, GuestAddress, GuestMemoryAtomic};
+use vmm_sys_util::eventfd::{EventFd, EFD_NONBLOCK};
+
+type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;

 const MEM_SIZE: u64 = 256 * 1024 * 1024;
 const DESC_SIZE: u64 = 16; // Bytes in one virtio descriptor.
@@ -73,10 +75,14 @@ fuzz_target!(|bytes| {
        return;
    }

-    let mut q = Queue::new(QUEUE_SIZE);
-    q.ready = true;
-    q.size = QUEUE_SIZE / 2;
-    q.max_size = QUEUE_SIZE;
+    let guest_memory = GuestMemoryAtomic::new(mem);
+
+    let mut q = Queue::<
+        GuestMemoryAtomic<GuestMemoryMmap>,
+        QueueState<GuestMemoryAtomic<GuestMemoryMmap>>,
+    >::new(guest_memory.clone(), QUEUE_SIZE);
+    q.state.ready = true;
+    q.state.size = QUEUE_SIZE / 2;

    let queue_evts: Vec<EventFd> = vec![EventFd::new(0).unwrap()];
    let queue_fd = queue_evts[0].as_raw_fd();
@@ -84,7 +90,7 @@ fuzz_target!(|bytes| {

    let shm = memfd_create(&ffi::CString::new("fuzz").unwrap(), 0).unwrap();
    let disk_file: File = unsafe { File::from_raw_fd(shm) };
-    let qcow_disk = Box::new(QcowDiskSync::new(disk_file, false)) as Box<dyn DiskFile>;
+    let qcow_disk = Box::new(RawFileDiskSync::new(disk_file)) as Box<dyn DiskFile>;

    let mut block = Block::new(
        "tmp".to_owned(),
@@ -96,12 +102,13 @@ fuzz_target!(|bytes| {
        256,
        SeccompAction::Allow,
        None,
+        EventFd::new(EFD_NONBLOCK).unwrap(),
    )
    .unwrap();

    block
        .activate(
-            GuestMemoryAtomic::new(mem),
+            guest_memory,
            Arc::new(NoopVirtioInterrupt {}),
            vec![q],
            queue_evts,
@@ -133,7 +140,7 @@ impl VirtioInterrupt for NoopVirtioInterrupt {
    fn trigger(
        &self,
        _int_type: &VirtioInterruptType,
-        _queue: Option<&Queue>,
+        _queue: Option<&Queue<GuestMemoryAtomic<GuestMemoryMmap>>>,
    ) -> std::result::Result<(), std::io::Error> {
        Ok(())
    }
--- a/fuzz/fuzz_targets/vhdx.rs
+++ b/fuzz/fuzz_targets/vhdx.rs
@@ -0,0 +1,53 @@
+// Copyright © 2021 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+
+#![no_main]
+use libfuzzer_sys::fuzz_target;
+use std::ffi;
+use std::fs::File;
+use std::io::{self, Read, Seek, SeekFrom, Write};
+use std::os::unix::io::{FromRawFd, RawFd};
+use vhdx::vhdx::Vhdx;
+
+// Populate the corpus directory with a test file:
+// truncate -s 16M /tmp/source
+// qemu-img convert -O vhdx /tmp/source fuzz/corpus/vhdx/test.vhdx
+// Run with:
+// cargo fuzz run vhdx -j 32 -- -max_len=16777216
+fuzz_target!(|bytes| {
+    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[..]).unwrap();
+    disk_file.seek(SeekFrom::Start(0)).unwrap();
+
+    if let Ok(mut vhdx) = Vhdx::new(disk_file) {
+        if vhdx.seek(SeekFrom::Start(0)).is_ok() {
+            let mut offset = 0;
+            while offset < bytes.len() {
+                let mut data = vec![0; 8192];
+                vhdx.read_exact(&mut data).ok();
+                offset += data.len();
+            }
+        }
+
+        if vhdx.seek(SeekFrom::Start(0)).is_ok() {
+            let mut offset = 0;
+            while offset < bytes.len() {
+                let data = vec![0; 8192];
+                vhdx.write_all(&data).ok();
+                offset += data.len();
+            }
+        }
+    }
+});
+
+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
@@ -11,23 +11,23 @@ mshv = ["mshv-ioctls", "mshv-bindings"]
 tdx = []

 [dependencies]
-anyhow = "1.0"
-epoll = ">=4.0.1"
-thiserror = "1.0"
-libc = "0.2.98"
+anyhow = "1.0.51"
+epoll = "4.3.1"
+thiserror = "1.0.30"
+libc = "0.2.108"
 log = "0.4.14"
-kvm-ioctls = {  version = "0.9.0", optional = true }
-kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch-v0.4.0", features = ["with-serde", "fam-wrappers"], optional  = true }
-mshv-bindings = {git = "https://github.com/cloud-hypervisor/mshv", branch = "master", features = ["with-serde", "fam-wrappers"], optional  = true }
-mshv-ioctls = { git = "https://github.com/cloud-hypervisor/mshv", branch = "master", optional  = true}
-serde = {version = ">=1.0.27", features = ["rc"] }
-serde_derive = ">=1.0.27"
-serde_json = ">=1.0.9"
-vm-memory = { version = "0.5.0", features = ["backend-mmap", "backend-atomic"] }
-vmm-sys-util = { version = ">=0.5.0", features = ["with-serde"] }
+kvm-ioctls = { version = "0.11.0", optional = true }
+kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch-v0.5.0", features = ["with-serde", "fam-wrappers"], optional  = true }
+mshv-bindings = {git = "https://github.com/rust-vmm/mshv", branch = "main", features = ["with-serde", "fam-wrappers"], optional  = true }
+mshv-ioctls = { git = "https://github.com/rust-vmm/mshv", branch = "main", optional  = true}
+serde = { version = "1.0.130", features = ["rc"] }
+serde_derive = "1.0.130"
+serde_json = "1.0.72"
+vm-memory = { version = "0.6.0", features = ["backend-mmap", "backend-atomic"] }
+vmm-sys-util = { version = "0.9.0", features = ["with-serde"] }

 [target.'cfg(target_arch = "x86_64")'.dependencies.iced-x86]
-version = "1.13"
+version = "1.15.0"
 default-features = false
 features = ["std", "decoder", "op_code_info", "instr_info", "fast_fmt"]

--- a/hypervisor/src/arch/emulator/mod.rs
+++ b/hypervisor/src/arch/emulator/mod.rs
@@ -18,7 +18,18 @@ pub struct Exception<T: Debug> {

 impl<T: Debug> Display for Exception<T> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "Exception {:?} at IP {:#x}", self.vector, self.ip)
+        write!(
+            f,
+            "Exception {:?} at IP {:#x}{}{}",
+            self.vector,
+            self.ip,
+            self.error
+                .map(|e| format!(": error {:x}", e))
+                .unwrap_or_else(|| "".to_owned()),
+            self.payload
+                .map(|payload| format!(": payload {:x}", payload))
+                .unwrap_or_else(|| "".to_owned())
+        )
    }
 }

--- a/hypervisor/src/arch/x86/emulator/mod.rs
+++ b/hypervisor/src/arch/x86/emulator/mod.rs
@@ -653,8 +653,6 @@ mod mock_vmm {
        state: Arc<Mutex<CpuState>>,
    }

-    unsafe impl Sync for MockVmm {}
-
    pub type MockResult = Result<(), EmulationError<Exception>>;

    impl MockVmm {
--- a/hypervisor/src/cpu.rs
+++ b/hypervisor/src/cpu.rs
@@ -174,6 +174,16 @@ pub enum HypervisorCpuError {
    #[error("Failed to get debug registers: {0}")]
    GetDebugRegs(#[source] anyhow::Error),
    ///
+    /// Setting misc register error
+    ///
+    #[error("Failed to set misc registers: {0}")]
+    SetMiscRegs(#[source] anyhow::Error),
+    ///
+    /// Getting misc register error
+    ///
+    #[error("Failed to get misc registers: {0}")]
+    GetMiscRegs(#[source] anyhow::Error),
+    ///
    /// Write to Guest Mem
    ///
    #[error("Failed to write to Guest Mem at: {0}")]
--- a/hypervisor/src/kvm/aarch64/mod.rs
+++ b/hypervisor/src/kvm/aarch64/mod.rs
@@ -26,23 +26,33 @@ pub use kvm_bindings::{
 use serde_derive::{Deserialize, Serialize};
 pub use {kvm_ioctls::Cap, kvm_ioctls::Kvm};

-// Following are macros that help with getting the ID of a aarch64 core register.
-// The core register are represented by the user_pt_regs structure. Look for it in
-// arch/arm64/include/uapi/asm/ptrace.h.
-
 // This macro gets the offset of a structure (i.e `str`) member (i.e `field`) without having
 // an instance of that structure.
 #[macro_export]
 macro_rules! offset__of {
    ($str:ty, $($field:ident)+) => ({
        let tmp: std::mem::MaybeUninit<$str> = std::mem::MaybeUninit::uninit();
-        let tmp = unsafe { tmp.assume_init() };
-        let base = &tmp as *const _ as usize;
-        let member =  &tmp.$($field)* as *const _ as usize;
+        let base = tmp.as_ptr();

-        member - base
+        // Avoid warnings when nesting `unsafe` blocks.
+        #[allow(unused_unsafe)]
+        // SAFETY: The pointer is valid and aligned, just not initialised. Using `addr_of` ensures
+        // that we don't actually read from `base` (which would be UB) nor create an intermediate
+        // reference.
+        let member = unsafe { core::ptr::addr_of!((*base).$($field)*) } as *const u8;
+
+        // Avoid warnings when nesting `unsafe` blocks.
+        #[allow(unused_unsafe)]
+        // SAFETY: The two pointers are within the same allocated object `tmp`. All requirements
+        // from offset_from are upheld.
+        unsafe { member.offset_from(base as *const u8) as usize }
    });
 }
+
+// Following are macros that help with getting the ID of a aarch64 core register.
+// The core register are represented by the user_pt_regs structure. Look for it in
+// arch/arm64/include/uapi/asm/ptrace.h.
+
 // Get the ID of a core register
 #[macro_export]
 macro_rules! arm64_core_reg_id {
@@ -115,9 +125,13 @@ pub fn is_system_register(regid: u64) -> bool {
    }

    let size = regid & KVM_REG_SIZE_MASK;
-    if size != KVM_REG_SIZE_U32 && size != KVM_REG_SIZE_U64 {
-        panic!("Unexpected register size for system register {}", size);
-    }
+
+    assert!(
+        !(size != KVM_REG_SIZE_U32 && size != KVM_REG_SIZE_U64),
+        "Unexpected register size for system register {}",
+        size
+    );
+
    true
 }

--- a/hypervisor/src/kvm/mod.rs
+++ b/hypervisor/src/kvm/mod.rs
@@ -22,6 +22,7 @@ use crate::vm::{self, VmmOps};
 use crate::{arm64_core_reg_id, offset__of};
 use kvm_ioctls::{NoDatamatch, VcpuFd, VmFd};
 use serde_derive::{Deserialize, Serialize};
+use std::collections::HashMap;
 #[cfg(target_arch = "aarch64")]
 use std::convert::TryInto;
 #[cfg(target_arch = "x86_64")]
@@ -30,7 +31,7 @@ use std::os::unix::io::{AsRawFd, RawFd};
 use std::result;
 #[cfg(target_arch = "x86_64")]
 use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::Arc;
+use std::sync::{Arc, RwLock};
 #[cfg(target_arch = "x86_64")]
 use vm_memory::Address;
 use vmm_sys_util::eventfd::EventFd;
@@ -110,12 +111,21 @@ enum TdxCommand {
 pub struct KvmVmState {}

 pub use KvmVmState as VmState;
+
+struct KvmDirtyLogSlot {
+    slot: u32,
+    guest_phys_addr: u64,
+    memory_size: u64,
+    userspace_addr: u64,
+}
+
 /// Wrapper over KVM VM ioctls.
 pub struct KvmVm {
    fd: Arc<VmFd>,
    #[cfg(target_arch = "x86_64")]
    msrs: MsrEntries,
    state: KvmVmState,
+    dirty_log_slots: Arc<RwLock<HashMap<u32, KvmDirtyLogSlot>>>,
 }

 ///
@@ -168,7 +178,7 @@ impl vm::Vm for KvmVm {
    fn create_vcpu(
        &self,
        id: u8,
-        vmmops: Option<Arc<Box<dyn VmmOps>>>,
+        vmmops: Option<Arc<dyn VmmOps>>,
    ) -> vm::Result<Arc<dyn cpu::Vcpu>> {
        let vc = self
            .fd
@@ -228,6 +238,9 @@ impl vm::Vm for KvmVm {
        irq_routing[0].nr = entries.len() as u32;
        irq_routing[0].flags = 0;

+        // SAFETY: irq_routing initialized with entries.len() and now it is being turned into
+        // entries_slice with entries.len() again. It is guaranteed to be large enough to hold
+        // everything from entries.
        unsafe {
            let entries_slice: &mut [kvm_irq_routing_entry] =
                irq_routing[0].entries.as_mut_slice(entries.len());
@@ -267,10 +280,35 @@ impl vm::Vm for KvmVm {
    /// Creates a guest physical memory region.
    ///
    fn create_user_memory_region(&self, user_memory_region: MemoryRegion) -> vm::Result<()> {
-        // Safe because guest regions are guaranteed not to overlap.
+        let mut region = user_memory_region;
+
+        if (region.flags & KVM_MEM_LOG_DIRTY_PAGES) != 0 {
+            if (region.flags & KVM_MEM_READONLY) != 0 {
+                return Err(vm::HypervisorVmError::CreateUserMemory(anyhow!(
+                    "Error creating regions with both 'dirty-pages-log' and 'read-only'."
+                )));
+            }
+
+            // Keep track of the regions that need dirty pages log
+            self.dirty_log_slots.write().unwrap().insert(
+                region.slot,
+                KvmDirtyLogSlot {
+                    slot: region.slot,
+                    guest_phys_addr: region.guest_phys_addr,
+                    memory_size: region.memory_size,
+                    userspace_addr: region.userspace_addr,
+                },
+            );
+
+            // Always create guest physical memory region without `KVM_MEM_LOG_DIRTY_PAGES`.
+            // For regions that need this flag, dirty pages log will be turned on in `start_dirty_log`.
+            region.flags = 0;
+        }
+
+        // SAFETY: Safe because guest regions are guaranteed not to overlap.
        unsafe {
            self.fd
-                .set_user_memory_region(user_memory_region)
+                .set_user_memory_region(region)
                .map_err(|e| vm::HypervisorVmError::CreateUserMemory(e.into()))
        }
    }
@@ -280,9 +318,12 @@ impl vm::Vm for KvmVm {
    fn remove_user_memory_region(&self, user_memory_region: MemoryRegion) -> vm::Result<()> {
        let mut region = user_memory_region;

+        // Remove the corresponding entry from "self.dirty_log_slots" if needed
+        self.dirty_log_slots.write().unwrap().remove(&region.slot);
+
        // Setting the size to 0 means "remove"
        region.memory_size = 0;
-        // Safe because guest regions are guaranteed not to overlap.
+        // SAFETY: Safe because guest regions are guaranteed not to overlap.
        unsafe {
            self.fd
                .set_user_memory_region(region)
@@ -383,10 +424,58 @@ impl vm::Vm for KvmVm {
        Ok(())
    }

+    ///
+    /// Start logging dirty pages
+    ///
+    fn start_dirty_log(&self) -> vm::Result<()> {
+        let dirty_log_slots = self.dirty_log_slots.read().unwrap();
+        for (_, s) in dirty_log_slots.iter() {
+            let region = MemoryRegion {
+                slot: s.slot,
+                guest_phys_addr: s.guest_phys_addr,
+                memory_size: s.memory_size,
+                userspace_addr: s.userspace_addr,
+                flags: KVM_MEM_LOG_DIRTY_PAGES,
+            };
+            // SAFETY: Safe because guest regions are guaranteed not to overlap.
+            unsafe {
+                self.fd
+                    .set_user_memory_region(region)
+                    .map_err(|e| vm::HypervisorVmError::StartDirtyLog(e.into()))?;
+            }
+        }
+
+        Ok(())
+    }
+
+    ///
+    /// Stop logging dirty pages
+    ///
+    fn stop_dirty_log(&self) -> vm::Result<()> {
+        let dirty_log_slots = self.dirty_log_slots.read().unwrap();
+        for (_, s) in dirty_log_slots.iter() {
+            let region = MemoryRegion {
+                slot: s.slot,
+                guest_phys_addr: s.guest_phys_addr,
+                memory_size: s.memory_size,
+                userspace_addr: s.userspace_addr,
+                flags: 0,
+            };
+            // SAFETY: Safe because guest regions are guaranteed not to overlap.
+            unsafe {
+                self.fd
+                    .set_user_memory_region(region)
+                    .map_err(|e| vm::HypervisorVmError::StartDirtyLog(e.into()))?;
+            }
+        }
+
+        Ok(())
+    }
+
    ///
    /// Get dirty pages bitmap (one bit per page)
    ///
-    fn get_dirty_log(&self, slot: u32, memory_size: u64) -> vm::Result<Vec<u64>> {
+    fn get_dirty_log(&self, slot: u32, _base_gpa: u64, memory_size: u64) -> vm::Result<Vec<u64>> {
        self.fd
            .get_dirty_log(slot, memory_size as usize)
            .map_err(|e| vm::HypervisorVmError::GetDirtyLog(e.into()))
@@ -400,15 +489,23 @@ impl vm::Vm for KvmVm {
        #[repr(C)]
        struct TdxInitVm {
            max_vcpus: u32,
-            reserved: u32,
+            tsc_khz: u32,
            attributes: u64,
            cpuid: u64,
+            mrconfigid: [u64; 6],
+            mrowner: [u64; 6],
+            mrownerconfig: [u64; 6],
+            reserved: [u64; 43],
        }
        let data = TdxInitVm {
            max_vcpus,
-            reserved: 0,
+            tsc_khz: 0,
            attributes: 1, // TDX1_TD_ATTRIBUTE_DEBUG,
            cpuid: cpuid.as_fam_struct_ptr() as u64,
+            mrconfigid: [0; 6],
+            mrowner: [0; 6],
+            mrownerconfig: [0; 6],
+            reserved: [0; 43],
        };

        tdx_command(
@@ -480,6 +577,7 @@ fn tdx_command(
        metadata,
        data,
    };
+    // SAFETY: FFI call. All input parameters are valid.
    let ret = unsafe {
        ioctl_with_val(
            fd,
@@ -571,6 +669,7 @@ impl hypervisor::Hypervisor for KvmHypervisor {
                fd: vm_fd,
                msrs,
                state: VmState {},
+                dirty_log_slots: Arc::new(RwLock::new(HashMap::new())),
            }))
        }

@@ -579,6 +678,7 @@ impl hypervisor::Hypervisor for KvmHypervisor {
            Ok(Arc::new(KvmVm {
                fd: vm_fd,
                state: VmState {},
+                dirty_log_slots: Arc::new(RwLock::new(HashMap::new())),
            }))
        }
    }
@@ -643,7 +743,7 @@ pub struct KvmVcpu {
    fd: VcpuFd,
    #[cfg(target_arch = "x86_64")]
    msrs: MsrEntries,
-    vmmops: Option<Arc<Box<dyn vm::VmmOps>>>,
+    vmmops: Option<Arc<dyn vm::VmmOps>>,
    #[cfg(target_arch = "x86_64")]
    hyperv_synic: AtomicBool,
 }
@@ -1057,10 +1157,11 @@ impl cpu::Vcpu for KvmVcpu {
        // https://elixir.free-electrons.com/linux/v4.9.62/source/arch/arm64/include/uapi/asm/kvm.h#L53
        let mut off = offset__of!(kvm_regs, fp_regs) + offset__of!(user_fpsimd_state, vregs);
        for i in 0..32 {
-            state.fp_regs.vregs[i][0] = self
+            state.fp_regs.vregs[i] = self
                .fd
                .get_one_reg(arm64_core_reg_id!(KVM_REG_SIZE_U128, off))
-                .map_err(|e| cpu::HypervisorCpuError::GetCoreRegister(e.into()))?;
+                .map_err(|e| cpu::HypervisorCpuError::GetCoreRegister(e.into()))?
+                .into();
            off += mem::size_of::<u128>();
        }

@@ -1137,7 +1238,7 @@ impl cpu::Vcpu for KvmVcpu {
            self.fd
                .set_one_reg(
                    arm64_core_reg_id!(KVM_REG_SIZE_U128, off),
-                    state.fp_regs.vregs[i][0],
+                    state.fp_regs.vregs[i] as u64,
                )
                .map_err(|e| cpu::HypervisorCpuError::SetCoreRegister(e.into()))?;
            off += mem::size_of::<u128>();
@@ -1177,19 +1278,12 @@ impl cpu::Vcpu for KvmVcpu {
        // call KVM_GET_ONE_REG on each id in order to save all of them. We carve out from the list
        // the core registers which are represented in the kernel by kvm_regs structure and for which
        // we can calculate the id based on the offset in the structure.
-
-        reg_list.retain(|regid| *regid != 0);
-        reg_list.as_slice().to_vec().sort_unstable();
-
        reg_list.retain(|regid| is_system_register(*regid));

        // Now, for the rest of the registers left in the previously fetched register list, we are
        // simply calling KVM_GET_ONE_REG.
        let indices = reg_list.as_slice();
-        for (_pos, index) in indices.iter().enumerate() {
-            if _pos > 230 {
-                break;
-            }
+        for index in indices.iter() {
            state.push(kvm_bindings::kvm_one_reg {
                id: *index,
                addr: self
@@ -1284,8 +1378,8 @@ impl cpu::Vcpu for KvmVcpu {
                0x40000020, 0x40000021, 0x40000080, 0x40000081, 0x40000082, 0x40000083, 0x40000084,
                0x40000090, 0x40000091, 0x40000092, 0x40000093, 0x40000094, 0x40000095, 0x40000096,
                0x40000097, 0x40000098, 0x40000099, 0x4000009a, 0x4000009b, 0x4000009c, 0x4000009d,
-                0x4000009f, 0x400000b0, 0x400000b1, 0x400000b2, 0x400000b3, 0x400000b4, 0x400000b5,
-                0x400000b6, 0x400000b7,
+                0x4000009e, 0x4000009f, 0x400000b0, 0x400000b1, 0x400000b2, 0x400000b3, 0x400000b4,
+                0x400000b5, 0x400000b6, 0x400000b7,
            ];
            for index in hyperv_synic_msrs {
                let msr = kvm_msr_entry {
--- a/hypervisor/src/mshv/mod.rs
+++ b/hypervisor/src/mshv/mod.rs
@@ -16,7 +16,8 @@ pub use mshv_bindings::*;
 pub use mshv_ioctls::IoEventAddress;
 use mshv_ioctls::{set_registers_64, Mshv, NoDatamatch, VcpuFd, VmFd};
 use serde_derive::{Deserialize, Serialize};
-use std::sync::Arc;
+use std::collections::HashMap;
+use std::sync::{Arc, RwLock};
 use vm::DataMatch;
 // x86_64 dependencies
 #[cfg(target_arch = "x86_64")]
@@ -30,8 +31,19 @@ pub use x86_64::*;

 #[cfg(target_arch = "x86_64")]
 use std::fs::File;
-use std::os::unix::io::AsRawFd;
-use std::sync::RwLock;
+use std::os::unix::io::{AsRawFd, RawFd};
+
+const DIRTY_BITMAP_CLEAR_DIRTY: u64 = 0x4;
+const DIRTY_BITMAP_SET_DIRTY: u64 = 0x8;
+
+///
+/// Export generically-named wrappers of mshv-bindings for Unix-based platforms
+///
+pub use {
+    mshv_bindings::mshv_create_device as CreateDevice,
+    mshv_bindings::mshv_device_attr as DeviceAttr,
+    mshv_bindings::mshv_msi_routing_entry as IrqRoutingEntry, mshv_ioctls::DeviceFd,
+};

 pub const PAGE_SHIFT: usize = 12;

@@ -42,6 +54,11 @@ pub struct HvState {

 pub use HvState as VmState;

+struct MshvDirtyLogSlot {
+    guest_pfn: u64,
+    memory_size: u64,
+}
+
 /// Wrapper over mshv system ioctls.
 pub struct MshvHypervisor {
    mshv: Mshv,
@@ -106,6 +123,7 @@ impl hypervisor::Hypervisor for MshvHypervisor {
            msrs,
            hv_state: hv_state_init(),
            vmmops: None,
+            dirty_log_slots: Arc::new(RwLock::new(HashMap::new())),
        }))
    }
    ///
@@ -133,7 +151,7 @@ pub struct MshvVcpu {
    cpuid: CpuId,
    msrs: MsrEntries,
    hv_state: Arc<RwLock<HvState>>, // Mshv State
-    vmmops: Option<Arc<Box<dyn vm::VmmOps>>>,
+    vmmops: Option<Arc<dyn vm::VmmOps>>,
 }

 /// Implementation of Vcpu trait for Microsoft Hypervisor
@@ -270,9 +288,7 @@ impl cpu::Vcpu for MshvVcpu {
    }
    #[allow(non_upper_case_globals)]
    fn run(&self) -> std::result::Result<cpu::VmExit, cpu::HypervisorCpuError> {
-        // Safe because this is just only done during initialization.
-        // TODO don't zero it everytime we enter this function.
-        let hv_message: hv_message = unsafe { std::mem::zeroed() };
+        let hv_message: hv_message = hv_message::default();
        match self.fd.run(hv_message) {
            Ok(x) => match x.header.message_type {
                hv_message_type_HVMSG_X64_HALT => {
@@ -286,6 +302,7 @@ impl cpu::Vcpu for MshvVcpu {
                hv_message_type_HVMSG_X64_IO_PORT_INTERCEPT => {
                    let info = x.to_ioport_info().unwrap();
                    let access_info = info.access_info;
+                    // SAFETY: access_info is valid, otherwise we won't be here
                    let len = unsafe { access_info.__bindgen_anon_1.access_size() } as usize;
                    let is_write = info.header.intercept_access_type == 1;
                    let port = info.port_number;
@@ -326,12 +343,15 @@ impl cpu::Vcpu for MshvVcpu {
                        _ => {}
                    }

-                    if unsafe { access_info.__bindgen_anon_1.string_op() } == 1 {
-                        panic!("String IN/OUT not supported");
-                    }
-                    if unsafe { access_info.__bindgen_anon_1.rep_prefix() } == 1 {
-                        panic!("Rep IN/OUT not supported");
-                    }
+                    // SAFETY: access_info is valid, otherwise we won't be here
+                    assert!(
+                        !(unsafe { access_info.__bindgen_anon_1.string_op() } == 1),
+                        "String IN/OUT not supported"
+                    );
+                    assert!(
+                        !(unsafe { access_info.__bindgen_anon_1.rep_prefix() } == 1),
+                        "Rep IN/OUT not supported"
+                    );

                    if is_write {
                        let data = (info.rax as u32).to_le_bytes();
@@ -490,6 +510,13 @@ impl cpu::Vcpu for MshvVcpu {
        self.set_xcrs(&state.xcrs)?;
        self.set_lapic(&state.lapic)?;
        self.set_xsave(&state.xsave)?;
+        // These registers are global and needed to be set only for first VCPU
+        // as Microsoft Hypervisor allows setting this regsier for only one VCPU
+        if self.vp_index == 0 {
+            self.fd
+                .set_misc_regs(&state.misc)
+                .map_err(|e| cpu::HypervisorCpuError::SetMiscRegs(e.into()))?
+        }
        self.fd
            .set_debug_regs(&state.dbg)
            .map_err(|e| cpu::HypervisorCpuError::SetDebugRegs(e.into()))?;
@@ -508,10 +535,15 @@ impl cpu::Vcpu for MshvVcpu {
        self.get_msrs(&mut msrs)?;
        let lapic = self.get_lapic()?;
        let xsave = self.get_xsave()?;
+        let misc = self
+            .fd
+            .get_misc_regs()
+            .map_err(|e| cpu::HypervisorCpuError::GetMiscRegs(e.into()))?;
        let dbg = self
            .fd
            .get_debug_regs()
            .map_err(|e| cpu::HypervisorCpuError::GetDebugRegs(e.into()))?;
+
        Ok(CpuState {
            msrs,
            vcpu_events,
@@ -522,6 +554,7 @@ impl cpu::Vcpu for MshvVcpu {
            lapic,
            dbg,
            xsave,
+            misc,
        })
    }
    #[cfg(target_arch = "x86_64")]
@@ -547,6 +580,36 @@ impl cpu::Vcpu for MshvVcpu {
    }
 }

+/// Device struct for MSHV
+pub struct MshvDevice {
+    fd: DeviceFd,
+}
+
+impl device::Device for MshvDevice {
+    ///
+    /// 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()))
+    }
+    ///
+    /// Get device attribute
+    ///
+    fn get_device_attr(&self, attr: &mut DeviceAttr) -> device::Result<()> {
+        self.fd
+            .get_device_attr(attr)
+            .map_err(|e| device::HypervisorDeviceError::GetDeviceAttribute(e.into()))
+    }
+}
+
+impl AsRawFd for MshvDevice {
+    fn as_raw_fd(&self) -> RawFd {
+        self.fd.as_raw_fd()
+    }
+}
+
 struct MshvEmulatorContext<'a> {
    vcpu: &'a MshvVcpu,
    map: (u64, u64), // Initial GVA to GPA mapping provided by the hypervisor
@@ -568,6 +631,7 @@ impl<'a> MshvEmulatorContext<'a> {
            .translate_gva(gva, flags.into())
            .map_err(|e| PlatformError::TranslateVirtualAddress(anyhow!(e)))?;

+        // SAFETY: r is valid, otherwise this function will have returned
        let result_code = unsafe { r.1.__bindgen_anon_1.result_code };
        match result_code {
            hv_translate_gva_result_code_HV_TRANSLATE_GVA_SUCCESS => Ok(r.0),
@@ -680,7 +744,8 @@ pub struct MshvVm {
    msrs: MsrEntries,
    // Hypervisor State
    hv_state: Arc<RwLock<HvState>>,
-    vmmops: Option<Arc<Box<dyn vm::VmmOps>>>,
+    vmmops: Option<Arc<dyn vm::VmmOps>>,
+    dirty_log_slots: Arc<RwLock<HashMap<u64, MshvDirtyLogSlot>>>,
 }

 fn hv_state_init() -> Arc<RwLock<HvState>> {
@@ -742,7 +807,7 @@ impl vm::Vm for MshvVm {
    fn create_vcpu(
        &self,
        id: u8,
-        vmmops: Option<Arc<Box<dyn VmmOps>>>,
+        vmmops: Option<Arc<dyn VmmOps>>,
    ) -> vm::Result<Arc<dyn cpu::Vcpu>> {
        let vcpu_fd = self
            .fd
@@ -806,6 +871,17 @@ impl vm::Vm for MshvVm {

    /// Creates a guest physical memory region.
    fn create_user_memory_region(&self, user_memory_region: MemoryRegion) -> vm::Result<()> {
+        // No matter read only or not we keep track the slots.
+        // For readonly hypervisor can enable the dirty bits,
+        // but a VM exit happens before setting the dirty bits
+        self.dirty_log_slots.write().unwrap().insert(
+            user_memory_region.guest_pfn,
+            MshvDirtyLogSlot {
+                guest_pfn: user_memory_region.guest_pfn,
+                memory_size: user_memory_region.size,
+            },
+        );
+
        self.fd
            .map_user_memory(user_memory_region)
            .map_err(|e| vm::HypervisorVmError::CreateUserMemory(e.into()))?;
@@ -814,6 +890,12 @@ impl vm::Vm for MshvVm {

    /// Removes a guest physical memory region.
    fn remove_user_memory_region(&self, user_memory_region: MemoryRegion) -> vm::Result<()> {
+        // Remove the corresponding entry from "self.dirty_log_slots" if needed
+        self.dirty_log_slots
+            .write()
+            .unwrap()
+            .remove(&user_memory_region.guest_pfn);
+
        self.fd
            .unmap_user_memory(user_memory_region)
            .map_err(|e| vm::HypervisorVmError::RemoveUserMemory(e.into()))?;
@@ -842,10 +924,28 @@ impl vm::Vm for MshvVm {
        }
    }

+    ///
+    /// Creates an in-kernel device.
+    ///
+    /// See the documentation for `MSHV_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 = MshvDevice { fd };
+        Ok(Arc::new(device))
+    }
+
    fn create_passthrough_device(&self) -> vm::Result<Arc<dyn device::Device>> {
-        Err(vm::HypervisorVmError::CreatePassthroughDevice(anyhow!(
-            "No passthrough support"
-        )))
+        let mut vfio_dev = mshv_create_device {
+            type_: mshv_device_type_MSHV_DEV_TYPE_VFIO,
+            fd: 0,
+            flags: 0,
+        };
+
+        self.create_device(&mut vfio_dev)
+            .map_err(|e| vm::HypervisorVmError::CreatePassthroughDevice(e.into()))
    }

    fn set_gsi_routing(&self, entries: &[IrqRoutingEntry]) -> vm::Result<()> {
@@ -853,6 +953,9 @@ impl vm::Vm for MshvVm {
            vec_with_array_field::<mshv_msi_routing, mshv_msi_routing_entry>(entries.len());
        msi_routing[0].nr = entries.len() as u32;

+        // SAFETY: msi_routing initialized with entries.len() and now it is being turned into
+        // entries_slice with entries.len() again. It is guaranteed to be large enough to hold
+        // everything from entries.
        unsafe {
            let entries_slice: &mut [mshv_msi_routing_entry] =
                msi_routing[0].entries.as_mut_slice(entries.len());
@@ -877,16 +980,44 @@ impl vm::Vm for MshvVm {
        Ok(())
    }
    ///
+    /// Start logging dirty pages
+    ///
+    fn start_dirty_log(&self) -> vm::Result<()> {
+        self.fd
+            .enable_dirty_page_tracking()
+            .map_err(|e| vm::HypervisorVmError::StartDirtyLog(e.into()))
+    }
+    ///
+    /// Stop logging dirty pages
+    ///
+    fn stop_dirty_log(&self) -> vm::Result<()> {
+        let dirty_log_slots = self.dirty_log_slots.read().unwrap();
+        // Before disabling the dirty page tracking we need
+        // to set the dirty bits in the Hypervisor
+        // This is a requirement from Microsoft Hypervisor
+        for (_, s) in dirty_log_slots.iter() {
+            self.fd
+                .get_dirty_log(s.guest_pfn, s.memory_size as usize, DIRTY_BITMAP_SET_DIRTY)
+                .map_err(|e| vm::HypervisorVmError::StartDirtyLog(e.into()))?;
+        }
+        self.fd
+            .disable_dirty_page_tracking()
+            .map_err(|e| vm::HypervisorVmError::StartDirtyLog(e.into()))?;
+        Ok(())
+    }
+    ///
    /// Get dirty pages bitmap (one bit per page)
    ///
-    fn get_dirty_log(&self, _slot: u32, _memory_size: u64) -> vm::Result<Vec<u64>> {
-        Err(vm::HypervisorVmError::GetDirtyLog(anyhow!(
-            "get_dirty_log not implemented"
-        )))
+    fn get_dirty_log(&self, _slot: u32, base_gpa: u64, memory_size: u64) -> vm::Result<Vec<u64>> {
+        self.fd
+            .get_dirty_log(
+                base_gpa >> PAGE_SHIFT,
+                memory_size as usize,
+                DIRTY_BITMAP_CLEAR_DIRTY,
+            )
+            .map_err(|e| vm::HypervisorVmError::GetDirtyLog(e.into()))
    }
 }
 pub use hv_cpuid_entry as CpuIdEntry;

-pub type IrqRoutingEntry = mshv_msi_routing_entry;
-
 pub const CPUID_FLAG_VALID_INDEX: u32 = 0;
--- a/hypervisor/src/mshv/x86_64/mod.rs
+++ b/hypervisor/src/mshv/x86_64/mod.rs
@@ -18,10 +18,11 @@ pub use {
    mshv_bindings::mshv_user_mem_region as MemoryRegion, mshv_bindings::msr_entry as MsrEntry,
    mshv_bindings::CpuId, mshv_bindings::DebugRegisters,
    mshv_bindings::FloatingPointUnit as FpuState, mshv_bindings::LapicState,
-    mshv_bindings::MsrList, mshv_bindings::Msrs as MsrEntries, mshv_bindings::Msrs,
-    mshv_bindings::SegmentRegister, mshv_bindings::SpecialRegisters,
-    mshv_bindings::StandardRegisters, mshv_bindings::SuspendRegisters, mshv_bindings::VcpuEvents,
-    mshv_bindings::XSave as Xsave, mshv_bindings::Xcrs as ExtendedControlRegisters,
+    mshv_bindings::MiscRegs as MiscRegisters, mshv_bindings::MsrList,
+    mshv_bindings::Msrs as MsrEntries, mshv_bindings::Msrs, mshv_bindings::SegmentRegister,
+    mshv_bindings::SpecialRegisters, mshv_bindings::StandardRegisters,
+    mshv_bindings::SuspendRegisters, mshv_bindings::VcpuEvents, mshv_bindings::XSave as Xsave,
+    mshv_bindings::Xcrs as ExtendedControlRegisters,
 };

 #[derive(Clone, Serialize, Deserialize)]
@@ -35,6 +36,7 @@ pub struct VcpuMshvState {
    pub lapic: LapicState,
    pub dbg: DebugRegisters,
    pub xsave: Xsave,
+    pub misc: MiscRegisters,
 }

 impl fmt::Display for VcpuMshvState {
@@ -61,8 +63,6 @@ impl fmt::Display for VcpuMshvState {
    }
 }

-pub struct CreateDevice {}
-pub struct DeviceAttr {}
 pub struct IrqRouting {}
 pub enum VcpuExit {}
 pub struct MpState {}
--- a/hypervisor/src/vm.rs
+++ b/hypervisor/src/vm.rs
@@ -16,7 +16,6 @@ use crate::device::Device;
 use crate::x86_64::CpuId;
 #[cfg(all(feature = "kvm", target_arch = "x86_64"))]
 use crate::ClockData;
-#[cfg(feature = "kvm")]
 use crate::CreateDevice;
 #[cfg(feature = "mshv")]
 use crate::HvState as VmState;
@@ -168,6 +167,16 @@ pub enum HypervisorVmError {
    #[error("Failed to write to IO Bus: {0}")]
    IoBusWrite(#[source] anyhow::Error),
    ///
+    /// Start dirty log error
+    ///
+    #[error("Failed to get dirty log: {0}")]
+    StartDirtyLog(#[source] anyhow::Error),
+    ///
+    /// Stop dirty log error
+    ///
+    #[error("Failed to get dirty log: {0}")]
+    StopDirtyLog(#[source] anyhow::Error),
+    ///
    /// Get dirty log error
    ///
    #[error("Failed to get dirty log: {0}")]
@@ -218,7 +227,7 @@ pub trait Vm: Send + Sync {
    /// 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, vmmops: Option<Arc<Box<dyn VmmOps>>>) -> Result<Arc<dyn Vcpu>>;
+    fn create_vcpu(&self, id: u8, vmmops: Option<Arc<dyn VmmOps>>) -> Result<Arc<dyn Vcpu>>;
    /// Registers an event to be signaled whenever a certain address is written to.
    fn register_ioevent(
        &self,
@@ -244,7 +253,6 @@ pub trait Vm: Send + Sync {
    fn create_user_memory_region(&self, user_memory_region: MemoryRegion) -> Result<()>;
    /// Removes a guest physical memory slot.
    fn remove_user_memory_region(&self, user_memory_region: MemoryRegion) -> Result<()>;
-    #[cfg(feature = "kvm")]
    /// 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.
@@ -270,8 +278,12 @@ pub trait Vm: Send + Sync {
    fn state(&self) -> Result<VmState>;
    /// Set the VM state
    fn set_state(&self, state: VmState) -> Result<()>;
+    /// Start logging dirty pages
+    fn start_dirty_log(&self) -> Result<()>;
+    /// Stop logging dirty pages
+    fn stop_dirty_log(&self) -> Result<()>;
    /// Get dirty pages bitmap
-    fn get_dirty_log(&self, slot: u32, memory_size: u64) -> Result<Vec<u64>>;
+    fn get_dirty_log(&self, slot: u32, base_gpa: u64, memory_size: u64) -> Result<Vec<u64>>;
    #[cfg(feature = "tdx")]
    /// Initalize TDX on this VM
    fn tdx_init(&self, cpuid: &CpuId, max_vcpus: u32) -> Result<()>;
--- a/net_gen/Cargo.toml
+++ b/net_gen/Cargo.toml
@@ -5,4 +5,4 @@ authors = ["The Chromium OS Authors"]
 edition = "2018"

 [dependencies]
-vmm-sys-util = ">=0.3.1"
+vmm-sys-util = "0.9.0"
--- a/net_util/Cargo.toml
+++ b/net_util/Cargo.toml
@@ -5,20 +5,22 @@ authors = ["The Chromium OS Authors"]
 edition = "2018"

 [dependencies]
-epoll = ">=4.0.1"
-libc = "0.2.98"
+epoll = "4.3.1"
+getrandom = "0.2"
+libc = "0.2.108"
 log = "0.4.14"
 net_gen = { path = "../net_gen" }
 rate_limiter = { path = "../rate_limiter" }
-serde = "1.0.126"
+serde = "1.0.130"
 versionize = "0.1.6"
 versionize_derive = "0.1.4"
 virtio-bindings = "0.1.0"
-vm-memory = { version = "0.5.0", features = ["backend-mmap", "backend-atomic", "backend-bitmap"] }
+virtio-queue = { path = "../virtio-queue" }
+vm-memory = { version = "0.6.0", features = ["backend-mmap", "backend-atomic", "backend-bitmap"] }
 vm-virtio = { path = "../vm-virtio" }
-vmm-sys-util = ">=0.3.1"
+vmm-sys-util = "0.9.0"

 [dev-dependencies]
-lazy_static = "1.3.0"
+lazy_static = "1.4.0"
 pnet = "0.28.0"
-serde_json = "1.0.64"
+serde_json = "1.0.72"
--- a/net_util/src/ctrl_queue.rs
+++ b/net_util/src/ctrl_queue.rs
@@ -12,17 +12,25 @@ use virtio_bindings::bindings::virtio_net::{
    VIRTIO_NET_F_GUEST_ECN, VIRTIO_NET_F_GUEST_TSO4, VIRTIO_NET_F_GUEST_TSO6,
    VIRTIO_NET_F_GUEST_UFO, VIRTIO_NET_OK,
 };
-use vm_memory::{ByteValued, Bytes, GuestMemoryError};
-use vm_virtio::Queue;
+use virtio_queue::Queue;
+use vm_memory::{ByteValued, Bytes, GuestMemoryAtomic, GuestMemoryError};

 #[derive(Debug)]
 pub enum Error {
    /// Read queue failed.
    GuestMemory(GuestMemoryError),
-    /// No queue pairs number.
-    NoQueuePairsDescriptor,
+    /// No control header descriptor
+    NoControlHeaderDescriptor,
+    /// Missing the data descriptor in the chain.
+    NoDataDescriptor,
    /// No status descriptor
    NoStatusDescriptor,
+    /// Failed adding used index
+    QueueAddUsed(virtio_queue::Error),
+    /// Failed creating an iterator over the queue
+    QueueIterator(virtio_queue::Error),
+    /// Failed enabling notification for the queue
+    QueueEnableNotification(virtio_queue::Error),
 }

 type Result<T> = std::result::Result<T, Error>;
@@ -34,6 +42,7 @@ pub struct ControlHeader {
    pub cmd: u8,
 }

+// SAFETY: ControlHeader only contains a series of integers
 unsafe impl ByteValued for ControlHeader {}

 pub struct CtrlQueue {
@@ -45,22 +54,26 @@ impl CtrlQueue {
        CtrlQueue { taps }
    }

-    pub fn process(&mut self, mem: &GuestMemoryMmap, queue: &mut Queue) -> Result<bool> {
+    pub fn process(
+        &mut self,
+        queue: &mut Queue<GuestMemoryAtomic<GuestMemoryMmap>>,
+    ) -> Result<bool> {
        let mut used_desc_heads = Vec::new();
-        for avail_desc in queue.iter(mem) {
-            let ctrl_hdr: ControlHeader =
-                mem.read_obj(avail_desc.addr).map_err(Error::GuestMemory)?;
-            let data_desc = avail_desc
-                .next_descriptor()
-                .ok_or(Error::NoQueuePairsDescriptor)?;
-            let status_desc = data_desc
-                .next_descriptor()
-                .ok_or(Error::NoStatusDescriptor)?;
+        for mut desc_chain in queue.iter().map_err(Error::QueueIterator)? {
+            let ctrl_desc = desc_chain.next().ok_or(Error::NoControlHeaderDescriptor)?;
+
+            let ctrl_hdr: ControlHeader = desc_chain
+                .memory()
+                .read_obj(ctrl_desc.addr())
+                .map_err(Error::GuestMemory)?;
+            let data_desc = desc_chain.next().ok_or(Error::NoDataDescriptor)?;
+            let status_desc = desc_chain.next().ok_or(Error::NoStatusDescriptor)?;

            let ok = match u32::from(ctrl_hdr.class) {
                VIRTIO_NET_CTRL_MQ => {
-                    let queue_pairs = mem
-                        .read_obj::<u16>(data_desc.addr)
+                    let queue_pairs = desc_chain
+                        .memory()
+                        .read_obj::<u16>(data_desc.addr())
                        .map_err(Error::GuestMemory)?;
                    if u32::from(ctrl_hdr.cmd) != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET {
                        warn!("Unsupported command: {}", ctrl_hdr.cmd);
@@ -76,8 +89,9 @@ impl CtrlQueue {
                    }
                }
                VIRTIO_NET_CTRL_GUEST_OFFLOADS => {
-                    let features = mem
-                        .read_obj::<u64>(data_desc.addr)
+                    let features = desc_chain
+                        .memory()
+                        .read_obj::<u64>(data_desc.addr())
                        .map_err(Error::GuestMemory)?;
                    if u32::from(ctrl_hdr.cmd) != VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET {
                        warn!("Unsupported command: {}", ctrl_hdr.cmd);
@@ -102,17 +116,24 @@ impl CtrlQueue {
                }
            };

-            mem.write_obj(
-                if ok { VIRTIO_NET_OK } else { VIRTIO_NET_ERR } as u8,
-                status_desc.addr,
-            )
-            .map_err(Error::GuestMemory)?;
-            used_desc_heads.push((avail_desc.index, avail_desc.len));
+            desc_chain
+                .memory()
+                .write_obj(
+                    if ok { VIRTIO_NET_OK } else { VIRTIO_NET_ERR } as u8,
+                    status_desc.addr(),
+                )
+                .map_err(Error::GuestMemory)?;
+            let len = ctrl_desc.len() + data_desc.len() + status_desc.len();
+            used_desc_heads.push((desc_chain.head_index(), len));
        }

        for (desc_index, len) in used_desc_heads.iter() {
-            queue.add_used(mem, *desc_index, *len);
-            queue.update_avail_event(mem);
+            queue
+                .add_used(*desc_index, *len)
+                .map_err(Error::QueueAddUsed)?;
+            queue
+                .enable_notification()
+                .map_err(Error::QueueEnableNotification)?;
        }

        Ok(!used_desc_heads.is_empty())
--- a/net_util/src/lib.rs
+++ b/net_util/src/lib.rs
@@ -59,7 +59,7 @@ pub struct VirtioNetConfig {
    pub duplex: u8,
 }

-// Safe because it only has data and has no implicit padding.
+// SAFETY: it only has data and has no implicit padding.
 unsafe impl ByteValued for VirtioNetConfig {}

 /// Create a sockaddr_in from an IPv4 address, and expose it as
@@ -121,7 +121,7 @@ pub fn unregister_listener(
 }

 pub fn build_net_config_space(
-    mut config: &mut VirtioNetConfig,
+    config: &mut VirtioNetConfig,
    mac: MacAddr,
    num_queues: usize,
    avail_features: &mut u64,
@@ -129,7 +129,7 @@ pub fn build_net_config_space(
    config.mac.copy_from_slice(mac.get_bytes());
    *avail_features |= 1 << VIRTIO_NET_F_MAC;

-    build_net_config_space_with_mq(&mut config, num_queues, avail_features);
+    build_net_config_space_with_mq(config, num_queues, avail_features);
 }

 pub fn build_net_config_space_with_mq(
--- a/net_util/src/mac.rs
+++ b/net_util/src/mac.rs
@@ -82,21 +82,12 @@ impl MacAddr {
    pub fn local_random() -> MacAddr {
        // Generate a fully random MAC
        let mut random_bytes = [0u8; MAC_ADDR_LEN];
-        unsafe {
-            // Man page says this function will not be interrupted by a signal
-            // for requests less than 256 bytes
-            if libc::getrandom(
-                random_bytes.as_mut_ptr() as *mut _ as *mut libc::c_void,
-                MAC_ADDR_LEN,
-                0,
-            ) < 0
-            {
-                error!(
-                    "Error populating MAC address with random data: {}",
-                    std::io::Error::last_os_error()
-                )
-            }
-        };
+        if let Err(e) = getrandom::getrandom(&mut random_bytes) {
+            error!(
+                "Error populating MAC address with random data: {}",
+                e.to_string()
+            );
+        }

        // Set the first byte to make the OUI a locally administered OUI
        random_bytes[0] = 0x2e;
@@ -170,7 +161,7 @@ mod tests {

        let mac = MacAddr::parse_str("12:34:56:78:9a:BC").unwrap();

-        println!("parsed MAC address: {}", mac.to_string());
+        println!("parsed MAC address: {}", mac);

        let bytes = mac.get_bytes();
        assert_eq!(bytes, [0x12u8, 0x34, 0x56, 0x78, 0x9a, 0xbc]);
--- a/net_util/src/queue_pair.rs
+++ b/net_util/src/queue_pair.rs
@@ -10,8 +10,8 @@ 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, GuestAddressSpace, GuestMemory, GuestMemoryAtomic};
-use vm_virtio::Queue;
+use virtio_queue::Queue;
+use vm_memory::{Bytes, GuestMemory, GuestMemoryAtomic};

 #[derive(Clone)]
 pub struct TxVirtio {
@@ -35,78 +35,93 @@ impl TxVirtio {

    pub fn process_desc_chain(
        &mut self,
-        mem: &GuestMemoryMmap,
        tap: &mut Tap,
-        queue: &mut Queue,
+        queue: &mut Queue<GuestMemoryAtomic<GuestMemoryMmap>>,
        rate_limiter: &mut Option<RateLimiter>,
    ) -> Result<bool, NetQueuePairError> {
        let mut retry_write = false;
        let mut rate_limit_reached = false;
-        while let Some(avail_desc) = queue.iter(mem).next() {
-            if rate_limit_reached {
-                queue.go_to_previous_position();
+
+        loop {
+            let used_desc_head: (u16, u32);
+            let mut avail_iter = queue
+                .iter()
+                .map_err(NetQueuePairError::QueueIteratorFailed)?;
+
+            if let Some(mut desc_chain) = avail_iter.next() {
+                if rate_limit_reached {
+                    avail_iter.go_to_previous_position();
+                    break;
+                }
+
+                let mut next_desc = desc_chain.next();
+
+                let mut iovecs = Vec::new();
+                while let Some(desc) = next_desc {
+                    if !desc.is_write_only() && desc.len() > 0 {
+                        let buf = desc_chain
+                            .memory()
+                            .get_slice(desc.addr(), desc.len() as usize)
+                            .map_err(NetQueuePairError::GuestMemory)?
+                            .as_ptr();
+                        let iovec = libc::iovec {
+                            iov_base: buf as *mut libc::c_void,
+                            iov_len: desc.len() as libc::size_t,
+                        };
+                        iovecs.push(iovec);
+                    }
+                    next_desc = desc_chain.next();
+                }
+
+                let len = if !iovecs.is_empty() {
+                    let result = unsafe {
+                        libc::writev(
+                            tap.as_raw_fd() as libc::c_int,
+                            iovecs.as_ptr() as *const libc::iovec,
+                            iovecs.len() as libc::c_int,
+                        )
+                    };
+
+                    if result < 0 {
+                        let e = std::io::Error::last_os_error();
+
+                        /* EAGAIN */
+                        if e.kind() == std::io::ErrorKind::WouldBlock {
+                            avail_iter.go_to_previous_position();
+                            retry_write = true;
+                            break;
+                        }
+                        error!("net: tx: failed writing to tap: {}", e);
+                        return Err(NetQueuePairError::WriteTap(e));
+                    }
+
+                    self.counter_bytes += Wrapping(result as u64 - vnet_hdr_len() as u64);
+                    self.counter_frames += Wrapping(1);
+
+                    result as u32
+                } else {
+                    0
+                };
+
+                used_desc_head = (desc_chain.head_index(), len);
+
+                // For the sake of simplicity (similar to the RX rate limiting), we always
+                // let the 'last' descriptor chain go-through even if it was over the rate
+                // limit, and simply stop processing oncoming `avail_desc` if any.
+                if let Some(rate_limiter) = rate_limiter {
+                    rate_limit_reached = !rate_limiter.consume(1, TokenType::Ops)
+                        || !rate_limiter.consume(len as u64, TokenType::Bytes);
+                }
+            } else {
                break;
            }

-            let head_index = avail_desc.index;
-            let mut next_desc = Some(avail_desc);
-
-            let mut iovecs = Vec::new();
-            while let Some(desc) = next_desc {
-                if !desc.is_write_only() && desc.len > 0 {
-                    let buf = mem
-                        .get_slice(desc.addr, desc.len as usize)
-                        .map_err(NetQueuePairError::GuestMemory)?
-                        .as_ptr();
-                    let iovec = libc::iovec {
-                        iov_base: buf as *mut libc::c_void,
-                        iov_len: desc.len as libc::size_t,
-                    };
-                    iovecs.push(iovec);
-                }
-                next_desc = desc.next_descriptor();
-            }
-
-            let len = if !iovecs.is_empty() {
-                let result = unsafe {
-                    libc::writev(
-                        tap.as_raw_fd() as libc::c_int,
-                        iovecs.as_ptr() as *const libc::iovec,
-                        iovecs.len() as libc::c_int,
-                    )
-                };
-
-                if result < 0 {
-                    let e = std::io::Error::last_os_error();
-
-                    /* EAGAIN */
-                    if e.kind() == std::io::ErrorKind::WouldBlock {
-                        queue.go_to_previous_position();
-                        retry_write = true;
-                        break;
-                    }
-                    error!("net: tx: failed writing to tap: {}", e);
-                    return Err(NetQueuePairError::WriteTap(e));
-                }
-
-                self.counter_bytes += Wrapping(result as u64 - vnet_hdr_len() as u64);
-                self.counter_frames += Wrapping(1);
-
-                result as u32
-            } else {
-                0
-            };
-
-            queue.add_used(mem, head_index, 0);
-            queue.update_avail_event(mem);
-
-            // For the sake of simplicity (similar to the RX rate limiting), we always
-            // let the 'last' descriptor chain go-through even if it was over the rate
-            // limit, and simply stop processing oncoming `avail_desc` if any.
-            if let Some(rate_limiter) = rate_limiter {
-                rate_limit_reached = !rate_limiter.consume(1, TokenType::Ops)
-                    || !rate_limiter.consume(len as u64, TokenType::Bytes);
-            }
+            queue
+                .add_used(used_desc_head.0, used_desc_head.1)
+                .map_err(NetQueuePairError::QueueAddUsed)?;
+            queue
+                .enable_notification()
+                .map_err(NetQueuePairError::QueueEnableNotification)?;
        }

        Ok(retry_write)
@@ -135,87 +150,106 @@ impl RxVirtio {

    pub fn process_desc_chain(
        &mut self,
-        mem: &GuestMemoryMmap,
        tap: &mut Tap,
-        queue: &mut Queue,
+        queue: &mut Queue<GuestMemoryAtomic<GuestMemoryMmap>>,
        rate_limiter: &mut Option<RateLimiter>,
    ) -> Result<bool, NetQueuePairError> {
        let mut exhausted_descs = true;
        let mut rate_limit_reached = false;

-        while let Some(avail_desc) = queue.iter(mem).next() {
-            if rate_limit_reached {
-                exhausted_descs = false;
-                queue.go_to_previous_position();
+        loop {
+            let used_desc_head: (u16, u32);
+            let mut avail_iter = queue
+                .iter()
+                .map_err(NetQueuePairError::QueueIteratorFailed)?;
+
+            if let Some(mut desc_chain) = avail_iter.next() {
+                if rate_limit_reached {
+                    exhausted_descs = false;
+                    avail_iter.go_to_previous_position();
+                    break;
+                }
+
+                let desc = desc_chain
+                    .next()
+                    .ok_or(NetQueuePairError::DescriptorChainTooShort)?;
+                let num_buffers_addr = desc_chain.memory().checked_offset(desc.addr(), 10).unwrap();
+                let mut next_desc = Some(desc);
+
+                let mut iovecs = Vec::new();
+                while let Some(desc) = next_desc {
+                    if desc.is_write_only() && desc.len() > 0 {
+                        let buf = desc_chain
+                            .memory()
+                            .get_slice(desc.addr(), desc.len() as usize)
+                            .map_err(NetQueuePairError::GuestMemory)?
+                            .as_ptr();
+                        let iovec = libc::iovec {
+                            iov_base: buf as *mut libc::c_void,
+                            iov_len: desc.len() as libc::size_t,
+                        };
+                        iovecs.push(iovec);
+                    }
+                    next_desc = desc_chain.next();
+                }
+
+                let len = if !iovecs.is_empty() {
+                    let result = unsafe {
+                        libc::readv(
+                            tap.as_raw_fd() as libc::c_int,
+                            iovecs.as_ptr() as *const libc::iovec,
+                            iovecs.len() as libc::c_int,
+                        )
+                    };
+                    if result < 0 {
+                        let e = std::io::Error::last_os_error();
+                        exhausted_descs = false;
+                        avail_iter.go_to_previous_position();
+
+                        /* EAGAIN */
+                        if e.kind() == std::io::ErrorKind::WouldBlock {
+                            break;
+                        }
+
+                        error!("net: rx: failed reading from tap: {}", e);
+                        return Err(NetQueuePairError::ReadTap(e));
+                    }
+
+                    // Write num_buffers to guest memory. We simply write 1 as we
+                    // never spread the frame over more than one descriptor chain.
+                    desc_chain
+                        .memory()
+                        .write_obj(1u16, num_buffers_addr)
+                        .map_err(NetQueuePairError::GuestMemory)?;
+
+                    self.counter_bytes += Wrapping(result as u64 - vnet_hdr_len() as u64);
+                    self.counter_frames += Wrapping(1);
+
+                    result as u32
+                } else {
+                    0
+                };
+
+                used_desc_head = (desc_chain.head_index(), len);
+
+                // For the sake of simplicity (keeping the handling of RX_QUEUE_EVENT and
+                // RX_TAP_EVENT totally asynchronous), we always let the 'last' descriptor
+                // chain go-through even if it was over the rate limit, and simply stop
+                // processing oncoming `avail_desc` if any.
+                if let Some(rate_limiter) = rate_limiter {
+                    rate_limit_reached = !rate_limiter.consume(1, TokenType::Ops)
+                        || !rate_limiter.consume(len as u64, TokenType::Bytes);
+                }
+            } else {
                break;
            }

-            let head_index = avail_desc.index;
-            let num_buffers_addr = mem.checked_offset(avail_desc.addr, 10).unwrap();
-            let mut next_desc = Some(avail_desc);
-
-            let mut iovecs = Vec::new();
-            while let Some(desc) = next_desc {
-                if desc.is_write_only() && desc.len > 0 {
-                    let buf = mem
-                        .get_slice(desc.addr, desc.len as usize)
-                        .map_err(NetQueuePairError::GuestMemory)?
-                        .as_ptr();
-                    let iovec = libc::iovec {
-                        iov_base: buf as *mut libc::c_void,
-                        iov_len: desc.len as libc::size_t,
-                    };
-                    iovecs.push(iovec);
-                }
-                next_desc = desc.next_descriptor();
-            }
-
-            let len = if !iovecs.is_empty() {
-                let result = unsafe {
-                    libc::readv(
-                        tap.as_raw_fd() as libc::c_int,
-                        iovecs.as_ptr() as *const libc::iovec,
-                        iovecs.len() as libc::c_int,
-                    )
-                };
-                if result < 0 {
-                    let e = std::io::Error::last_os_error();
-                    exhausted_descs = false;
-                    queue.go_to_previous_position();
-
-                    /* EAGAIN */
-                    if e.kind() == std::io::ErrorKind::WouldBlock {
-                        break;
-                    }
-
-                    error!("net: rx: failed reading from tap: {}", e);
-                    return Err(NetQueuePairError::ReadTap(e));
-                }
-
-                // Write num_buffers to guest memory. We simply write 1 as we
-                // never spread the frame over more than one descriptor chain.
-                mem.write_obj(1u16, num_buffers_addr)
-                    .map_err(NetQueuePairError::GuestMemory)?;
-
-                self.counter_bytes += Wrapping(result as u64 - vnet_hdr_len() as u64);
-                self.counter_frames += Wrapping(1);
-
-                result as u32
-            } else {
-                0
-            };
-
-            queue.add_used(mem, head_index, len);
-            queue.update_avail_event(mem);
-
-            // For the sake of simplicity (keeping the handling of RX_QUEUE_EVENT and
-            // RX_TAP_EVENT totally asynchronous), we always let the 'last' descriptor
-            // chain go-through even if it was over the rate limit, and simply stop
-            // processing oncoming `avail_desc` if any.
-            if let Some(rate_limiter) = rate_limiter {
-                rate_limit_reached = !rate_limiter.consume(1, TokenType::Ops)
-                    || !rate_limiter.consume(len as u64, TokenType::Bytes);
-            }
+            queue
+                .add_used(used_desc_head.0, used_desc_head.1)
+                .map_err(NetQueuePairError::QueueAddUsed)?;
+            queue
+                .enable_notification()
+                .map_err(NetQueuePairError::QueueEnableNotification)?;
        }

        Ok(exhausted_descs)
@@ -244,10 +278,19 @@ pub enum NetQueuePairError {
    ReadTap(io::Error),
    /// Error related to guest memory
    GuestMemory(vm_memory::GuestMemoryError),
+    /// Returned an error while iterating through the queue
+    QueueIteratorFailed(virtio_queue::Error),
+    /// Descriptor chain is too short
+    DescriptorChainTooShort,
+    /// Failed to determine if queue needed notification
+    QueueNeedsNotification(virtio_queue::Error),
+    /// Failed to enable notification on the queue
+    QueueEnableNotification(virtio_queue::Error),
+    /// Failed to add used index to the queue
+    QueueAddUsed(virtio_queue::Error),
 }

 pub struct NetQueuePair {
-    pub mem: Option<GuestMemoryAtomic<GuestMemoryMmap>>,
    pub tap: Tap,
    // With epoll each FD must be unique. So in order to filter the
    // events we need to get a second FD responding to the original
@@ -268,19 +311,13 @@ pub struct NetQueuePair {
 }

 impl NetQueuePair {
-    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())?;
-
-        let tx_tap_retry = self.tx.process_desc_chain(
-            &mem,
-            &mut self.tap,
-            &mut queue,
-            &mut self.tx_rate_limiter,
-        )?;
+    pub fn process_tx(
+        &mut self,
+        queue: &mut Queue<GuestMemoryAtomic<GuestMemoryMmap>>,
+    ) -> Result<bool, NetQueuePairError> {
+        let tx_tap_retry =
+            self.tx
+                .process_desc_chain(&mut self.tap, queue, &mut self.tx_rate_limiter)?;

        // We got told to try again when writing to the tap. Wait for the TAP to be writable
        if tx_tap_retry && !self.tx_tap_listening {
@@ -314,22 +351,19 @@ impl NetQueuePair {
        self.tx.counter_bytes = Wrapping(0);
        self.tx.counter_frames = Wrapping(0);

-        Ok(queue.needs_notification(&mem, queue.next_used))
+        queue
+            .needs_notification()
+            .map_err(NetQueuePairError::QueueNeedsNotification)
    }

-    pub fn process_rx(&mut self, mut queue: &mut Queue) -> Result<bool, NetQueuePairError> {
-        let mem = self
-            .mem
-            .as_ref()
-            .ok_or(NetQueuePairError::NoMemoryConfigured)
-            .map(|m| m.memory())?;
-
-        self.rx_desc_avail = !self.rx.process_desc_chain(
-            &mem,
-            &mut self.tap,
-            &mut queue,
-            &mut self.rx_rate_limiter,
-        )?;
+    pub fn process_rx(
+        &mut self,
+        queue: &mut Queue<GuestMemoryAtomic<GuestMemoryMmap>>,
+    ) -> Result<bool, NetQueuePairError> {
+        self.rx_desc_avail =
+            !self
+                .rx
+                .process_desc_chain(&mut self.tap, queue, &mut self.rx_rate_limiter)?;
        let rate_limit_reached = self
            .rx_rate_limiter
            .as_ref()
@@ -358,6 +392,8 @@ impl NetQueuePair {
        self.rx.counter_bytes = Wrapping(0);
        self.rx.counter_frames = Wrapping(0);

-        Ok(queue.needs_notification(&mem, queue.next_used))
+        queue
+            .needs_notification()
+            .map_err(NetQueuePairError::QueueNeedsNotification)
    }
 }
--- a/option_parser/src/lib.rs
+++ b/option_parser/src/lib.rs
@@ -5,6 +5,7 @@

 use std::collections::HashMap;
 use std::fmt;
+use std::num::ParseIntError;
 use std::str::FromStr;

 #[derive(Default)]
@@ -37,6 +38,32 @@ impl fmt::Display for OptionParserError {
 }
 type OptionParserResult<T> = std::result::Result<T, OptionParserError>;

+fn split_commas_outside_brackets(s: &str) -> OptionParserResult<Vec<String>> {
+    let mut list: Vec<String> = Vec::new();
+    let mut opened_brackets: usize = 0;
+    for element in s.trim().split(',') {
+        if opened_brackets > 0 {
+            if let Some(last) = list.last_mut() {
+                *last = format!("{},{}", last, element);
+            } else {
+                return Err(OptionParserError::InvalidSyntax(s.to_owned()));
+            }
+        } else {
+            list.push(element.to_string());
+        }
+
+        opened_brackets += element.matches('[').count();
+        let closing_brackets = element.matches(']').count();
+        if closing_brackets > opened_brackets {
+            return Err(OptionParserError::InvalidSyntax(s.to_owned()));
+        } else {
+            opened_brackets -= closing_brackets;
+        }
+    }
+
+    Ok(list)
+}
+
 impl OptionParser {
    pub fn new() -> Self {
        Self {
@@ -49,9 +76,7 @@ impl OptionParser {
            return Ok(());
        }

-        let options_list: Vec<&str> = input.trim().split(',').collect();
-
-        for option in options_list.iter() {
+        for option in split_commas_outside_brackets(input)?.iter() {
            let parts: Vec<&str> = option.split('=').collect();

            match self.options.get_mut(parts[0]) {
@@ -183,7 +208,11 @@ impl FromStr for IntegerList {

    fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
        let mut integer_list = Vec::new();
-        let ranges_list: Vec<&str> = s.trim().split(':').collect();
+        let ranges_list: Vec<&str> = s
+            .trim()
+            .trim_matches(|c| c == '[' || c == ']')
+            .split(',')
+            .collect();

        for range in ranges_list.iter() {
            let items: Vec<&str> = range.split('-').collect();
@@ -216,39 +245,71 @@ impl FromStr for IntegerList {
    }
 }

-pub struct TupleTwoIntegers(pub Vec<(u64, u64)>);
-
-pub enum TupleTwoIntegersParseError {
-    InvalidValue(String),
+pub trait TupleValue {
+    fn parse_value(input: &str) -> Result<Self, TupleError>
+    where
+        Self: Sized;
 }

-impl FromStr for TupleTwoIntegers {
-    type Err = TupleTwoIntegersParseError;
+impl TupleValue for u64 {
+    fn parse_value(input: &str) -> Result<Self, TupleError> {
+        input.parse::<u64>().map_err(TupleError::InvalidInteger)
+    }
+}
+
+impl TupleValue for Vec<u8> {
+    fn parse_value(input: &str) -> Result<Self, TupleError> {
+        Ok(IntegerList::from_str(input)
+            .map_err(TupleError::InvalidIntegerList)?
+            .0
+            .iter()
+            .map(|v| *v as u8)
+            .collect())
+    }
+}
+
+impl TupleValue for Vec<u64> {
+    fn parse_value(input: &str) -> Result<Self, TupleError> {
+        Ok(IntegerList::from_str(input)
+            .map_err(TupleError::InvalidIntegerList)?
+            .0)
+    }
+}
+
+pub struct Tuple<S, T>(pub Vec<(S, T)>);
+
+pub enum TupleError {
+    InvalidValue(String),
+    SplitOutsideBrackets(OptionParserError),
+    InvalidIntegerList(IntegerListParseError),
+    InvalidInteger(ParseIntError),
+}
+
+impl<S: FromStr, T: TupleValue> FromStr for Tuple<S, T> {
+    type Err = TupleError;

    fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
-        let mut list = Vec::new();
-        let tuples_list: Vec<&str> = s.trim().split(':').collect();
+        let mut list: Vec<(S, T)> = Vec::new();

+        let tuples_list =
+            split_commas_outside_brackets(s.trim().trim_matches(|c| c == '[' || c == ']'))
+                .map_err(TupleError::SplitOutsideBrackets)?;
        for tuple in tuples_list.iter() {
            let items: Vec<&str> = tuple.split('@').collect();

            if items.len() != 2 {
-                return Err(TupleTwoIntegersParseError::InvalidValue(
-                    (*tuple).to_string(),
-                ));
+                return Err(TupleError::InvalidValue((*tuple).to_string()));
            }

            let item1 = items[0]
-                .parse::<u64>()
-                .map_err(|_| TupleTwoIntegersParseError::InvalidValue(items[0].to_owned()))?;
-            let item2 = items[1]
-                .parse::<u64>()
-                .map_err(|_| TupleTwoIntegersParseError::InvalidValue(items[1].to_owned()))?;
+                .parse::<S>()
+                .map_err(|_| TupleError::InvalidValue(items[0].to_owned()))?;
+            let item2 = TupleValue::parse_value(items[1])?;

            list.push((item1, item2));
        }

-        Ok(TupleTwoIntegers(list))
+        Ok(Tuple(list))
    }
 }

@@ -262,7 +323,12 @@ impl FromStr for StringList {
    type Err = StringListParseError;

    fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
-        let string_list: Vec<String> = s.trim().split(':').map(|e| e.to_owned()).collect();
+        let string_list: Vec<String> = s
+            .trim()
+            .trim_matches(|c| c == '[' || c == ']')
+            .split(',')
+            .map(|e| e.to_owned())
+            .collect();

        Ok(StringList(string_list))
    }
--- a/pci/Cargo.toml
+++ b/pci/Cargo.toml
@@ -4,19 +4,26 @@ version = "0.1.0"
 authors = ["Samuel Ortiz <sameo@linux.intel.com>"]
 edition = "2018"

+[features]
+default = []
+kvm = ["vfio-ioctls/kvm"]
+mshv = ["vfio-ioctls/mshv"]
+
 [dependencies]
-anyhow = "1.0"
+anyhow = "1.0.51"
 byteorder = "1.4.3"
 hypervisor = { path = "../hypervisor" }
-vfio-ioctls = { git = "https://github.com/rust-vmm/vfio-ioctls", branch = "master" }
-vmm-sys-util = ">=0.3.1"
-libc = "0.2.98"
+vfio-ioctls = { git = "https://github.com/rust-vmm/vfio-ioctls", branch = "main", default-features = false }
+vfio_user = { path = "../vfio_user" }
+vmm-sys-util = "0.9.0"
+libc = "0.2.108"
 log = "0.4.14"
+thiserror = "1.0.30"
 versionize = "0.1.6"
 versionize_derive = "0.1.4"
 vm-allocator = { path = "../vm-allocator" }
 vm-device = { path = "../vm-device" }
-vm-memory = "0.5.0"
+vm-memory = "0.6.0"
 vm-migration = { path = "../vm-migration" }

 [dependencies.vfio-bindings]
--- a/pci/src/bus.rs
+++ b/pci/src/bus.rs
@@ -140,12 +140,8 @@ impl PciBus {
        Ok(())
    }

-    pub fn add_device(
-        &mut self,
-        pci_device_bdf: u32,
-        device: Arc<Mutex<dyn PciDevice>>,
-    ) -> Result<()> {
-        self.devices.insert(pci_device_bdf >> 3, device);
+    pub fn add_device(&mut self, device_id: u32, device: Arc<Mutex<dyn PciDevice>>) -> Result<()> {
+        self.devices.insert(device_id, device);
        Ok(())
    }

@@ -197,8 +193,8 @@ pub struct PciConfigIo {
 impl PciConfigIo {
    pub fn new(pci_bus: Arc<Mutex<PciBus>>) -> Self {
        PciConfigIo {
-            pci_bus,
            config_address: 0,
+            pci_bus,
        }
    }

@@ -222,6 +218,7 @@ impl PciConfigIo {
        }

        self.pci_bus
+            .as_ref()
            .lock()
            .unwrap()
            .devices
@@ -249,7 +246,7 @@ impl PciConfigIo {
            return None;
        }

-        let pci_bus = self.pci_bus.lock().unwrap();
+        let pci_bus = self.pci_bus.as_ref().lock().unwrap();
        if let Some(d) = pci_bus.devices.get(&(device as u32)) {
            let mut device = d.lock().unwrap();

--- a/pci/src/configuration.rs
+++ b/pci/src/configuration.rs
@@ -317,7 +317,7 @@ pub struct PciConfiguration {
 }

 /// See pci_regs.h in kernel
-#[derive(Copy, Clone, PartialEq, Versionize)]
+#[derive(Copy, Clone, PartialEq, Versionize, Debug)]
 pub enum PciBarRegionType {
    Memory32BitRegion = 0,
    IoRegion = 0x01,
@@ -794,9 +794,9 @@ impl PciConfiguration {
                    return None;
                }

-                debug!(
-                    "DETECT BAR REPROG: current 0x{:x}, new 0x{:x}",
-                    self.registers[reg_idx], value
+                info!(
+                    "Detected BAR reprogramming: (BAR {}) 0x{:x}->0x{:x}",
+                    reg_idx, self.registers[reg_idx], value
                );
                let old_base = u64::from(self.bars[bar_idx].addr & mask);
                let new_base = u64::from(value & mask);
@@ -820,9 +820,9 @@ impl PciConfiguration {
                    != (self.bars[bar_idx - 1].addr & self.writable_bits[reg_idx - 1])
                    || (value & mask) != (self.bars[bar_idx].addr & mask))
            {
-                debug!(
-                    "DETECT BAR REPROG: current 0x{:x}, new 0x{:x}",
-                    self.registers[reg_idx], value
+                info!(
+                    "Detected BAR reprogramming: (BAR {}) 0x{:x}->0x{:x}",
+                    reg_idx, self.registers[reg_idx], value
                );
                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]);
@@ -850,9 +850,9 @@ impl PciConfiguration {
                return None;
            }

-            debug!(
-                "DETECT ROM BAR REPROG: current 0x{:x}, new 0x{:x}",
-                self.registers[reg_idx], value
+            info!(
+                "Detected ROM BAR reprogramming: (BAR {}) 0x{:x}->0x{:x}",
+                reg_idx, self.registers[reg_idx], value
            );
            let old_base = u64::from(self.rom_bar_addr & mask);
            let new_base = u64::from(value & mask);
@@ -961,7 +961,7 @@ mod tests {
        foo: u8,
    }

-    // It is safe to implement BytesValued; all members are simple numbers and any value is valid.
+    // SAFETY: All members are simple numbers and any value is valid.
    unsafe impl ByteValued for TestCap {}

    impl PciCapability for TestCap {
--- a/pci/src/device.rs
+++ b/pci/src/device.rs
@@ -7,7 +7,7 @@ use std::any::Any;
 use std::fmt::{self, Display};
 use std::sync::{Arc, Barrier};
 use std::{self, io, result};
-use vm_allocator::SystemAllocator;
+use vm_allocator::{AddressAllocator, SystemAllocator};
 use vm_device::BusDevice;
 use vm_memory::{GuestAddress, GuestUsize};

@@ -52,12 +52,17 @@ pub trait PciDevice: BusDevice {
    fn allocate_bars(
        &mut self,
        _allocator: &mut SystemAllocator,
+        _mmio_allocator: &mut AddressAllocator,
    ) -> Result<Vec<(GuestAddress, GuestUsize, PciBarRegionType)>> {
        Ok(Vec::new())
    }

    /// Frees the PCI BARs previously allocated with a call to allocate_bars().
-    fn free_bars(&mut self, _allocator: &mut SystemAllocator) -> Result<()> {
+    fn free_bars(
+        &mut self,
+        _allocator: &mut SystemAllocator,
+        _mmio_allocator: &mut AddressAllocator,
+    ) -> Result<()> {
        Ok(())
    }

--- a/pci/src/lib.rs
+++ b/pci/src/lib.rs
@@ -12,6 +12,7 @@ mod device;
 mod msi;
 mod msix;
 mod vfio;
+mod vfio_user;

 pub use self::bus::{PciBus, PciConfigIo, PciConfigMmio, PciRoot, PciRootError};
 pub use self::configuration::{
@@ -25,6 +26,8 @@ pub use self::device::{
 pub use self::msi::{msi_num_enabled_vectors, MsiCap, MsiConfig};
 pub use self::msix::{MsixCap, MsixConfig, MsixTableEntry, MSIX_TABLE_ENTRY_SIZE};
 pub use self::vfio::{VfioPciDevice, VfioPciError};
+pub use self::vfio_user::{VfioUserDmaMapping, VfioUserPciDevice, VfioUserPciDeviceError};
+use std::fmt::Display;

 /// PCI has four interrupt pins A->D.
 #[derive(Copy, Clone)]
@@ -40,3 +43,81 @@ impl PciInterruptPin {
        self as u32
    }
 }
+
+#[cfg(target_arch = "x86_64")]
+pub const PCI_CONFIG_IO_PORT: u64 = 0xcf8;
+#[cfg(target_arch = "x86_64")]
+pub const PCI_CONFIG_IO_PORT_SIZE: u64 = 0x8;
+
+#[derive(Clone, Copy, PartialEq, PartialOrd)]
+pub struct PciBdf(u32);
+
+impl PciBdf {
+    pub fn segment(&self) -> u16 {
+        ((self.0 >> 16) & 0xffff) as u16
+    }
+
+    pub fn bus(&self) -> u8 {
+        ((self.0 >> 8) & 0xff) as u8
+    }
+
+    pub fn device(&self) -> u8 {
+        ((self.0 >> 3) & 0x1f) as u8
+    }
+
+    pub fn function(&self) -> u8 {
+        (self.0 & 0x7) as u8
+    }
+
+    pub fn new(segment: u16, bus: u8, device: u8, function: u8) -> Self {
+        Self(
+            (segment as u32) << 16
+                | (bus as u32) << 8
+                | ((device & 0x1f) as u32) << 3
+                | (function & 0x7) as u32,
+        )
+    }
+}
+
+impl From<u32> for PciBdf {
+    fn from(bdf: u32) -> Self {
+        Self(bdf)
+    }
+}
+
+impl From<PciBdf> for u32 {
+    fn from(bdf: PciBdf) -> Self {
+        bdf.0
+    }
+}
+
+impl From<&PciBdf> for u32 {
+    fn from(bdf: &PciBdf) -> Self {
+        bdf.0
+    }
+}
+
+impl From<PciBdf> for u16 {
+    fn from(bdf: PciBdf) -> Self {
+        (bdf.0 & 0xffff) as u16
+    }
+}
+
+impl From<&PciBdf> for u16 {
+    fn from(bdf: &PciBdf) -> Self {
+        (bdf.0 & 0xffff) as u16
+    }
+}
+
+impl Display for PciBdf {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{:04x}:{:02x}:{:02x}.{:01x}",
+            self.segment(),
+            self.bus(),
+            self.device(),
+            self.function()
+        )
+    }
+}
--- a/pci/src/msi.rs
+++ b/pci/src/msi.rs
@@ -159,11 +159,11 @@ impl MsiCap {

 pub struct MsiConfig {
    cap: MsiCap,
-    interrupt_source_group: Arc<Box<dyn InterruptSourceGroup>>,
+    interrupt_source_group: Arc<dyn InterruptSourceGroup>,
 }

 impl MsiConfig {
-    pub fn new(msg_ctl: u16, interrupt_source_group: Arc<Box<dyn InterruptSourceGroup>>) -> Self {
+    pub fn new(msg_ctl: u16, interrupt_source_group: Arc<dyn InterruptSourceGroup>) -> Self {
        let cap = MsiCap {
            msg_ctl,
            ..Default::default()
--- a/pci/src/msix.rs
+++ b/pci/src/msix.rs
@@ -74,7 +74,7 @@ pub struct MsixConfig {
    pub table_entries: Vec<MsixTableEntry>,
    pub pba_entries: Vec<u64>,
    pub devid: u32,
-    interrupt_source_group: Arc<Box<dyn InterruptSourceGroup>>,
+    interrupt_source_group: Arc<dyn InterruptSourceGroup>,
    masked: bool,
    enabled: bool,
 }
@@ -82,7 +82,7 @@ pub struct MsixConfig {
 impl MsixConfig {
    pub fn new(
        msix_vectors: u16,
-        interrupt_source_group: Arc<Box<dyn InterruptSourceGroup>>,
+        interrupt_source_group: Arc<dyn InterruptSourceGroup>,
        devid: u32,
    ) -> Self {
        assert!(msix_vectors <= MAX_MSIX_VECTORS_PER_DEVICE);
@@ -468,7 +468,7 @@ pub struct MsixCap {
    pub pba: u32,
 }

-// It is safe to implement ByteValued. All members are simple numbers and any value is valid.
+// SAFETY: All members are simple numbers and any value is valid.
 unsafe impl ByteValued for MsixCap {}

 impl PciCapability for MsixCap {
@@ -533,4 +533,16 @@ impl MsixCap {
    pub fn table_size(&self) -> u16 {
        (self.msg_ctl & 0x7ff) + 1
    }
+
+    pub fn table_range(&self) -> (u64, u64) {
+        // The table takes 16 bytes per entry.
+        let size = self.table_size() as u64 * 16;
+        (self.table_offset() as u64, size)
+    }
+
+    pub fn pba_range(&self) -> (u64, u64) {
+        // The table takes 1 bit per entry modulo 8 bytes.
+        let size = ((self.table_size() as u64 / 64) + 1) * 8;
+        (self.pba_offset() as u64, size)
+    }
 }
--- a/pci/src/vfio.rs
+++ b/pci/src/vfio.rs
--- a/pci/src/vfio_user.rs
+++ b/pci/src/vfio_user.rs
@@ -0,0 +1,547 @@
+// Copyright © 2021 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+use crate::vfio::{Interrupt, Vfio, VfioCommon, VfioError};
+use crate::{BarReprogrammingParams, PciBarRegionType, VfioPciError};
+use crate::{
+    PciClassCode, PciConfiguration, PciDevice, PciDeviceError, PciHeaderType, PciSubclass,
+};
+use hypervisor::HypervisorVmError;
+use std::any::Any;
+use std::os::unix::prelude::AsRawFd;
+use std::ptr::null_mut;
+use std::sync::{Arc, Barrier, Mutex};
+use std::u32;
+use thiserror::Error;
+use vfio_bindings::bindings::vfio::*;
+use vfio_ioctls::VfioIrq;
+use vfio_user::{Client, Error as VfioUserError};
+use vm_allocator::{AddressAllocator, SystemAllocator};
+use vm_device::dma_mapping::ExternalDmaMapping;
+use vm_device::interrupt::{InterruptManager, InterruptSourceGroup, MsiIrqGroupConfig};
+use vm_device::BusDevice;
+use vm_memory::bitmap::AtomicBitmap;
+use vm_memory::{
+    Address, GuestAddress, GuestAddressSpace, GuestMemory, GuestMemoryRegion, GuestRegionMmap,
+    GuestUsize,
+};
+use vmm_sys_util::eventfd::EventFd;
+
+pub struct VfioUserPciDevice {
+    vm: Arc<dyn hypervisor::Vm>,
+    client: Arc<Mutex<Client>>,
+    vfio_wrapper: VfioUserClientWrapper,
+    common: VfioCommon,
+}
+
+#[derive(Error, Debug)]
+pub enum VfioUserPciDeviceError {
+    #[error("Client error: {0}")]
+    Client(#[source] VfioUserError),
+    #[error("Failed to map VFIO PCI region into guest: {0}")]
+    MapRegionGuest(#[source] HypervisorVmError),
+    #[error("Failed to DMA map: {0}")]
+    DmaMap(#[source] VfioUserError),
+    #[error("Failed to DMA unmap: {0}")]
+    DmaUnmap(#[source] VfioUserError),
+    #[error("Failed to initialize legacy interrupts: {0}")]
+    InitializeLegacyInterrupts(#[source] VfioPciError),
+}
+
+#[derive(Copy, Clone)]
+enum PciVfioUserSubclass {
+    VfioUserSubclass = 0xff,
+}
+
+impl PciSubclass for PciVfioUserSubclass {
+    fn get_register_value(&self) -> u8 {
+        *self as u8
+    }
+}
+
+impl VfioUserPciDevice {
+    pub fn new(
+        vm: &Arc<dyn hypervisor::Vm>,
+        client: Arc<Mutex<Client>>,
+        msi_interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = MsiIrqGroupConfig>>,
+        legacy_interrupt_group: Option<Arc<dyn InterruptSourceGroup>>,
+    ) -> Result<Self, VfioUserPciDeviceError> {
+        // This is used for the BAR and capabilities only
+        let configuration = PciConfiguration::new(
+            0,
+            0,
+            0,
+            PciClassCode::Other,
+            &PciVfioUserSubclass::VfioUserSubclass,
+            None,
+            PciHeaderType::Device,
+            0,
+            0,
+            None,
+        );
+        let resettable = client.lock().unwrap().resettable();
+        if resettable {
+            client
+                .lock()
+                .unwrap()
+                .reset()
+                .map_err(VfioUserPciDeviceError::Client)?;
+        }
+
+        let vfio_wrapper = VfioUserClientWrapper {
+            client: client.clone(),
+        };
+
+        let mut common = VfioCommon {
+            mmio_regions: Vec::new(),
+            configuration,
+            interrupt: Interrupt {
+                intx: None,
+                msi: None,
+                msix: None,
+            },
+        };
+
+        common.parse_capabilities(msi_interrupt_manager, &vfio_wrapper);
+        common
+            .initialize_legacy_interrupt(legacy_interrupt_group, &vfio_wrapper)
+            .map_err(VfioUserPciDeviceError::InitializeLegacyInterrupts)?;
+
+        Ok(Self {
+            vm: vm.clone(),
+            client,
+            vfio_wrapper,
+            common,
+        })
+    }
+
+    pub fn map_mmio_regions<F>(
+        &mut self,
+        vm: &Arc<dyn hypervisor::Vm>,
+        mem_slot: F,
+    ) -> Result<(), VfioUserPciDeviceError>
+    where
+        F: Fn() -> u32,
+    {
+        for mmio_region in &mut self.common.mmio_regions {
+            let region_flags = self
+                .client
+                .lock()
+                .unwrap()
+                .region(mmio_region.index)
+                .unwrap()
+                .flags;
+            let file_offset = self
+                .client
+                .lock()
+                .unwrap()
+                .region(mmio_region.index)
+                .unwrap()
+                .file_offset
+                .clone();
+
+            if region_flags & VFIO_REGION_INFO_FLAG_MMAP != 0 {
+                let mut prot = 0;
+                if region_flags & VFIO_REGION_INFO_FLAG_READ != 0 {
+                    prot |= libc::PROT_READ;
+                }
+                if region_flags & VFIO_REGION_INFO_FLAG_WRITE != 0 {
+                    prot |= libc::PROT_WRITE;
+                }
+
+                let host_addr = unsafe {
+                    libc::mmap(
+                        null_mut(),
+                        mmio_region.length as usize,
+                        prot,
+                        libc::MAP_SHARED,
+                        file_offset.as_ref().unwrap().file().as_raw_fd(),
+                        file_offset.as_ref().unwrap().start() as libc::off_t,
+                    )
+                };
+
+                if host_addr == libc::MAP_FAILED {
+                    error!(
+                        "Could not mmap regions, error:{}",
+                        std::io::Error::last_os_error()
+                    );
+                    continue;
+                }
+
+                let slot = mem_slot();
+                let mem_region = vm.make_user_memory_region(
+                    slot,
+                    mmio_region.start.0,
+                    mmio_region.length as u64,
+                    host_addr as u64,
+                    false,
+                    false,
+                );
+
+                vm.create_user_memory_region(mem_region)
+                    .map_err(VfioUserPciDeviceError::MapRegionGuest)?;
+
+                mmio_region.mem_slot = Some(slot);
+                mmio_region.host_addr = Some(host_addr as u64);
+                mmio_region.mmap_size = Some(mmio_region.length as usize);
+            }
+        }
+
+        Ok(())
+    }
+
+    pub fn unmap_mmio_regions(&mut self) {
+        for mmio_region in self.common.mmio_regions.iter() {
+            if let (Some(host_addr), Some(mmap_size), Some(mem_slot)) = (
+                mmio_region.host_addr,
+                mmio_region.mmap_size,
+                mmio_region.mem_slot,
+            ) {
+                // Remove region
+                let r = self.vm.make_user_memory_region(
+                    mem_slot,
+                    mmio_region.start.raw_value(),
+                    mmap_size as u64,
+                    host_addr as u64,
+                    false,
+                    false,
+                );
+
+                if let Err(e) = self.vm.remove_user_memory_region(r) {
+                    error!("Could not remove the userspace memory region: {}", e);
+                }
+
+                let ret = unsafe { libc::munmap(host_addr as *mut libc::c_void, mmap_size) };
+                if ret != 0 {
+                    error!(
+                        "Could not unmap region {}, error:{}",
+                        mmio_region.index,
+                        std::io::Error::last_os_error()
+                    );
+                }
+            }
+        }
+    }
+
+    pub fn dma_map(
+        &mut self,
+        region: &GuestRegionMmap<AtomicBitmap>,
+    ) -> Result<(), VfioUserPciDeviceError> {
+        let (fd, offset) = match region.file_offset() {
+            Some(_file_offset) => (_file_offset.file().as_raw_fd(), _file_offset.start()),
+            None => return Ok(()),
+        };
+
+        self.client
+            .lock()
+            .unwrap()
+            .dma_map(
+                offset,
+                region.start_addr().raw_value(),
+                region.len() as u64,
+                fd,
+            )
+            .map_err(VfioUserPciDeviceError::DmaMap)
+    }
+
+    pub fn dma_unmap(
+        &mut self,
+        region: &GuestRegionMmap<AtomicBitmap>,
+    ) -> Result<(), VfioUserPciDeviceError> {
+        self.client
+            .lock()
+            .unwrap()
+            .dma_unmap(region.start_addr().raw_value(), region.len() as u64)
+            .map_err(VfioUserPciDeviceError::DmaUnmap)
+    }
+}
+
+impl BusDevice for VfioUserPciDevice {
+    fn read(&mut self, base: u64, offset: u64, data: &mut [u8]) {
+        self.read_bar(base, offset, data)
+    }
+
+    fn write(&mut self, base: u64, offset: u64, data: &[u8]) -> Option<Arc<Barrier>> {
+        self.write_bar(base, offset, data)
+    }
+}
+
+#[repr(u32)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+#[allow(dead_code)]
+enum Regions {
+    Bar0,
+    Bar1,
+    Bar2,
+    Bar3,
+    Bar4,
+    Bar5,
+    Rom,
+    Config,
+    Vga,
+    Migration,
+}
+
+struct VfioUserClientWrapper {
+    client: Arc<Mutex<Client>>,
+}
+
+impl Vfio for VfioUserClientWrapper {
+    fn region_read(&self, index: u32, offset: u64, data: &mut [u8]) {
+        self.client
+            .lock()
+            .unwrap()
+            .region_read(index, offset, data)
+            .ok();
+    }
+
+    fn region_write(&self, index: u32, offset: u64, data: &[u8]) {
+        self.client
+            .lock()
+            .unwrap()
+            .region_write(index, offset, data)
+            .ok();
+    }
+
+    fn get_irq_info(&self, irq_index: u32) -> Option<VfioIrq> {
+        self.client
+            .lock()
+            .unwrap()
+            .get_irq_info(irq_index)
+            .ok()
+            .map(|i| VfioIrq {
+                index: i.index,
+                flags: i.flags,
+                count: i.count,
+            })
+    }
+
+    fn enable_irq(&self, irq_index: u32, event_fds: Vec<&EventFd>) -> Result<(), VfioError> {
+        info!(
+            "Enabling IRQ {:x} number of fds = {:?}",
+            irq_index,
+            event_fds.len()
+        );
+        let fds: Vec<i32> = event_fds.iter().map(|e| e.as_raw_fd()).collect();
+
+        self.client
+            .lock()
+            .unwrap()
+            .set_irqs(
+                irq_index,
+                VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER,
+                0,
+                event_fds.len() as u32,
+                &fds,
+            )
+            .map_err(VfioError::VfioUser)
+    }
+
+    fn disable_irq(&self, irq_index: u32) -> Result<(), VfioError> {
+        info!("Disabling IRQ {:x}", irq_index);
+        self.client
+            .lock()
+            .unwrap()
+            .set_irqs(
+                irq_index,
+                VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER,
+                0,
+                0,
+                &[],
+            )
+            .map_err(VfioError::VfioUser)
+    }
+
+    fn unmask_irq(&self, irq_index: u32) -> Result<(), VfioError> {
+        info!("Unmasking IRQ {:x}", irq_index);
+        self.client
+            .lock()
+            .unwrap()
+            .set_irqs(
+                irq_index,
+                VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK,
+                0,
+                1,
+                &[],
+            )
+            .map_err(VfioError::VfioUser)
+    }
+}
+
+impl PciDevice for VfioUserPciDevice {
+    fn allocate_bars(
+        &mut self,
+        allocator: &mut SystemAllocator,
+        mmio_allocator: &mut AddressAllocator,
+    ) -> Result<Vec<(GuestAddress, GuestUsize, PciBarRegionType)>, PciDeviceError> {
+        self.common
+            .allocate_bars(allocator, mmio_allocator, &self.vfio_wrapper)
+    }
+
+    fn free_bars(
+        &mut self,
+        allocator: &mut SystemAllocator,
+        mmio_allocator: &mut AddressAllocator,
+    ) -> Result<(), PciDeviceError> {
+        self.common.free_bars(allocator, mmio_allocator)
+    }
+
+    fn as_any(&mut self) -> &mut dyn Any {
+        self
+    }
+
+    fn detect_bar_reprogramming(
+        &mut self,
+        reg_idx: usize,
+        data: &[u8],
+    ) -> Option<BarReprogrammingParams> {
+        self.common
+            .configuration
+            .detect_bar_reprogramming(reg_idx, data)
+    }
+
+    fn write_config_register(
+        &mut self,
+        reg_idx: usize,
+        offset: u64,
+        data: &[u8],
+    ) -> Option<Arc<Barrier>> {
+        self.common
+            .write_config_register(reg_idx, offset, data, &self.vfio_wrapper)
+    }
+
+    fn read_config_register(&mut self, reg_idx: usize) -> u32 {
+        self.common
+            .read_config_register(reg_idx, &self.vfio_wrapper)
+    }
+
+    fn read_bar(&mut self, base: u64, offset: u64, data: &mut [u8]) {
+        self.common.read_bar(base, offset, data, &self.vfio_wrapper)
+    }
+
+    fn write_bar(&mut self, base: u64, offset: u64, data: &[u8]) -> Option<Arc<Barrier>> {
+        self.common
+            .write_bar(base, offset, data, &self.vfio_wrapper)
+    }
+
+    fn move_bar(&mut self, old_base: u64, new_base: u64) -> Result<(), std::io::Error> {
+        info!("Moving BAR 0x{:x} -> 0x{:x}", old_base, new_base);
+        for mmio_region in self.common.mmio_regions.iter_mut() {
+            if mmio_region.start.raw_value() == old_base {
+                mmio_region.start = GuestAddress(new_base);
+
+                if let Some(mem_slot) = mmio_region.mem_slot {
+                    if let Some(host_addr) = mmio_region.host_addr {
+                        // Remove original region
+                        let old_region = self.vm.make_user_memory_region(
+                            mem_slot,
+                            old_base,
+                            mmio_region.length as u64,
+                            host_addr as u64,
+                            false,
+                            false,
+                        );
+
+                        self.vm
+                            .remove_user_memory_region(old_region)
+                            .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))?;
+
+                        let new_region = self.vm.make_user_memory_region(
+                            mem_slot,
+                            new_base,
+                            mmio_region.length as u64,
+                            host_addr as u64,
+                            false,
+                            false,
+                        );
+
+                        self.vm
+                            .create_user_memory_region(new_region)
+                            .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))?;
+                    }
+                }
+                info!("Moved bar 0x{:x} -> 0x{:x}", old_base, new_base);
+            }
+        }
+
+        Ok(())
+    }
+}
+
+impl Drop for VfioUserPciDevice {
+    fn drop(&mut self) {
+        self.unmap_mmio_regions();
+
+        if let Some(msix) = &self.common.interrupt.msix {
+            if msix.bar.enabled() {
+                self.common.disable_msix(&self.vfio_wrapper);
+            }
+        }
+
+        if let Some(msi) = &self.common.interrupt.msi {
+            if msi.cfg.enabled() {
+                self.common.disable_msi(&self.vfio_wrapper)
+            }
+        }
+
+        if self.common.interrupt.intx_in_use() {
+            self.common.disable_intx(&self.vfio_wrapper);
+        }
+    }
+}
+
+pub struct VfioUserDmaMapping<M: GuestAddressSpace> {
+    client: Arc<Mutex<Client>>,
+    memory: Arc<M>,
+}
+
+impl<M: GuestAddressSpace> VfioUserDmaMapping<M> {
+    pub fn new(client: Arc<Mutex<Client>>, memory: Arc<M>) -> Self {
+        Self { client, memory }
+    }
+}
+
+impl<M: GuestAddressSpace + Sync + Send> ExternalDmaMapping for VfioUserDmaMapping<M> {
+    fn map(&self, iova: u64, gpa: u64, size: u64) -> std::result::Result<(), std::io::Error> {
+        let mem = self.memory.memory();
+        let guest_addr = GuestAddress(gpa);
+        let region = mem.find_region(guest_addr);
+
+        if let Some(region) = region {
+            let file_offset = region.file_offset().unwrap();
+            let offset = (GuestAddress(gpa).checked_offset_from(region.start_addr())).unwrap()
+                + file_offset.start();
+
+            self.client
+                .lock()
+                .unwrap()
+                .dma_map(offset, iova, size, file_offset.file().as_raw_fd())
+                .map_err(|e| {
+                    std::io::Error::new(
+                        std::io::ErrorKind::Other,
+                        format!("Error mapping region: {}", e),
+                    )
+                })
+        } else {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::Other,
+                format!("Region not found for 0x{:x}", gpa),
+            ));
+        }
+    }
+
+    fn unmap(&self, iova: u64, size: u64) -> std::result::Result<(), std::io::Error> {
+        self.client
+            .lock()
+            .unwrap()
+            .dma_unmap(iova, size)
+            .map_err(|e| {
+                std::io::Error::new(
+                    std::io::ErrorKind::Other,
+                    format!("Error unmapping region: {}", e),
+                )
+            })
+    }
+}
--- a/qcow/Cargo.toml
+++ b/qcow/Cargo.toml
@@ -10,7 +10,7 @@ path = "src/qcow.rs"

 [dependencies]
 byteorder = "1.4.3"
-libc = "0.2.98"
+libc = "0.2.108"
 log = "0.4.14"
 remain = "0.2.2"
-vmm-sys-util = ">=0.3.1"
+vmm-sys-util = "0.9.0"
--- a/qcow/src/raw_file.rs
+++ b/qcow/src/raw_file.rs
@@ -28,8 +28,11 @@ 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();
+    // SAFETY: layout has non-zero size
    let ptr = unsafe { alloc_zeroed(layout) };
+    assert!(!ptr.is_null());

+    // SAFETY: FFI call
    let ret = unsafe {
        ::libc::pread(
            fd,
@@ -39,6 +42,7 @@ fn is_valid_alignment(fd: RawFd, alignment: usize) -> bool {
        )
    };

+    // SAFETY: ptr was allocated by alloc_zeroed with layout
    unsafe { dealloc(ptr, layout) };

    ret >= 0
@@ -141,11 +145,18 @@ impl Read for RawFile {
                .unwrap();

            let layout = Layout::from_size_align(rounded_len, self.alignment).unwrap();
+            // SAFETY: layout has non-zero size
            let tmp_ptr = unsafe { alloc_zeroed(layout) };
+            if tmp_ptr.is_null() {
+                return Err(io::Error::last_os_error());
+            }
+
+            // SAFETY: tmp_ptr is valid and at least rounded_len long
            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.
+            // SAFETY: FFI call. All parameters are valid.
            let ret = unsafe {
                ::libc::pread64(
                    self.file.as_raw_fd(),
@@ -155,12 +166,14 @@ impl Read for RawFile {
                )
            };
            if ret < 0 {
+                // SAFETY: tmp_ptr was allocated by alloc_zeroed with layout
                unsafe { dealloc(tmp_ptr, layout) };
                return Err(io::Error::last_os_error());
            }

            let read: usize = ret.try_into().unwrap();
            if read < file_offset {
+                // SAFETY: tmp_ptr was allocated by alloc_zeroed with layout
                unsafe { dealloc(tmp_ptr, layout) };
                return Ok(0);
            }
@@ -171,6 +184,7 @@ impl Read for RawFile {
            }

            buf.copy_from_slice(&tmp_buf[file_offset..(file_offset + buf_len)]);
+            // SAFETY: tmp_ptr was allocated by alloc_zeroed with layout
            unsafe { dealloc(tmp_ptr, layout) };

            self.seek(SeekFrom::Current(to_copy.try_into().unwrap()))
@@ -211,11 +225,17 @@ impl Write for RawFile {
                .unwrap();

            let layout = Layout::from_size_align(rounded_len, self.alignment).unwrap();
+            // SAFETY: layout has non-zero size
            let tmp_ptr = unsafe { alloc_zeroed(layout) };
+            if tmp_ptr.is_null() {
+                return Err(io::Error::last_os_error());
+            }
+
            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.
+            // SAFETY: FFI call
            let ret = unsafe {
                ::libc::pread64(
                    self.file.as_raw_fd(),
@@ -225,6 +245,7 @@ impl Write for RawFile {
                )
            };
            if ret < 0 {
+                // SAFETY: tmp_ptr was allocated by alloc_zeroed with layout
                unsafe { dealloc(tmp_ptr, layout) };
                return Err(io::Error::last_os_error());
            };
@@ -233,6 +254,7 @@ impl Write for RawFile {

            // This can eventually replaced with write_at once its interface
            // has been stabilized.
+            // SAFETY: FFI call
            let ret = unsafe {
                ::libc::pwrite64(
                    self.file.as_raw_fd(),
@@ -242,6 +264,7 @@ impl Write for RawFile {
                )
            };

+            // SAFETY: tmp_ptr was allocated by alloc_zeroed with layout
            unsafe { dealloc(tmp_ptr, layout) };

            if ret < 0 {
--- a/rate_limiter/Cargo.toml
+++ b/rate_limiter/Cargo.toml
@@ -4,6 +4,6 @@ version = "0.1.0"
 edition = "2018"

 [dependencies]
-libc = "0.2.98"
+libc = "0.2.108"
 log = "0.4.14"
-vmm-sys-util = "0.8.0"
+vmm-sys-util = "0.9.0"
--- a/release-notes.md
+++ b/release-notes.md
@@ -1,18 +1,46 @@
+- [v20.0](#v200)
+    - [Multiple PCI segments support](#multiple-pci-segments-support)
+    - [CPU pinning](#cpu-pinning)
+    - [Improved VFIO support](#improved-vfio-support)
+    - [Safer code](#safer-code)
+    - [Extended documentation](#extended-documentation)
+    - [Notable bug fixes](#notable-bug-fixes)
+    - [Contributors](#contributors)
+- [v19.0](#v190)
+    - [Improved PTY handling for serial and `virtio-console`](#improved-pty-handling-for-serial-and-virtio-console)
+    - [PCI boot time optimisations](#pci-boot-time-optimisations)
+    - [Improved TDX support](#improved-tdx-support)
+    - [Live migration enhancements](#live-migration-enhancements)
+    - [`virtio-mem` support with `vfio-user`](#virtio-mem-support-with-vfio-user)
+    - [AArch64 for `virtio-iommu`](#aarch64-for-virtio-iommu)
+    - [Notable bug fixes](#notable-bug-fixes-1)
+    - [Contributors](#contributors-1)
+- [v18.0](#v180)
+    - [Experimental User Device (`vfio-user`) support](#experimental-user-device-vfio-user-support)
+    - [Migration support for `vhost-user` devices](#migration-support-for-vhost-user-devices)
+    - [VHDX disk image support](#vhdx-disk-image-support)
+    - [Device pass through on MSHV hypervisor](#device-pass-through-on-mshv-hypervisor)
+    - [AArch64 for support `virtio-mem`](#aarch64-for-support-virtio-mem)
+    - [Live migration on MSHV hypervisor](#live-migration-on-mshv-hypervisor)
+    - [AArch64 CPU topology support](#aarch64-cpu-topology-support)
+    - [Power button support on AArch64](#power-button-support-on-aarch64)
+    - [Notable bug fixes](#notable-bug-fixes-2)
+    - [Contributors](#contributors-2)
 - [v17.0](#v170)
    - [ARM64 NUMA support using ACPI](#arm64-numa-support-using-acpi)
    - [`Seccomp` support for MSHV backend](#seccomp-support-for-mshv-backend)
    - [Hotplug of `macvtap` devices](#hotplug-of-macvtap-devices)
    - [Improved SGX support](#improved-sgx-support)
    - [Inflight tracking for `vhost-user` devices](#inflight-tracking-for-vhost-user-devices)
-    - [Notable bug fixes](#notable-bug-fixes)
-    - [Contributors](#contributors)
+    - [Notable bug fixes](#notable-bug-fixes-3)
+    - [Contributors](#contributors-3)
 - [v16.0](#v160)
    - [Improved live migration support](#improved-live-migration-support)
    - [Improved `vhost-user` support](#improved-vhost-user-support)
    - [ARM64 ACPI and UEFI support](#arm64-acpi-and-uefi-support)
-    - [Notable bug fixes](#notable-bug-fixes-1)
+    - [Notable bug fixes](#notable-bug-fixes-4)
    - [Removed functionality](#removed-functionality)
-    - [Contributors](#contributors-1)
+    - [Contributors](#contributors-4)
 - [v15.0](#v150)
    - [Version numbering and stability guarantees](#version-numbering-and-stability-guarantees)
    - [Network device rate limiting](#network-device-rate-limiting)
@@ -20,7 +48,7 @@
    - [`--api-socket` supports file descriptor parameter](#--api-socket-supports-file-descriptor-parameter)
    - [Bug fixes](#bug-fixes)
    - [Deprecations](#deprecations)
-    - [Contributors](#contributors-2)
+    - [Contributors](#contributors-5)
 - [v0.14.1](#v0141)
 - [v0.14.0](#v0140)
    - [Structured event monitoring](#structured-event-monitoring)
@@ -30,7 +58,7 @@
    - [PTY control for serial and `virtio-console`](#pty-control-for-serial-and-virtio-console)
    - [Block device rate limiting](#block-device-rate-limiting)
    - [Deprecations](#deprecations-1)
-    - [Contributors](#contributors-3)
+    - [Contributors](#contributors-6)
 - [v0.13.0](#v0130)
    - [Wider VFIO device support](#wider-vfio-device-support)
    - [Improved huge page support](#improved-huge-page-support)
@@ -38,33 +66,33 @@
    - [VHD disk image support](#vhd-disk-image-support)
    - [Improved Virtio device threading](#improved-virtio-device-threading)
    - [Clean shutdown support via synthetic power button](#clean-shutdown-support-via-synthetic-power-button)
-    - [Contributors](#contributors-4)
+    - [Contributors](#contributors-7)
 - [v0.12.0](#v0120)
    - [ARM64 enhancements](#arm64-enhancements)
    - [Removal of `vhost-user-net` and `vhost-user-block` self spawning](#removal-of-vhost-user-net-and-vhost-user-block-self-spawning)
    - [Migration of `vhost-user-fs` backend](#migration-of-vhost-user-fs-backend)
    - [Enhanced "info" API](#enhanced-info-api)
-    - [Contributors](#contributors-5)
+    - [Contributors](#contributors-8)
 - [v0.11.0](#v0110)
    - [`io_uring` support by default for `virtio-block`](#io_uring-support-by-default-for-virtio-block)
    - [Windows Guest Support](#windows-guest-support)
    - [`vhost-user` "Self Spawning" Deprecation](#vhost-user-self-spawning-deprecation)
-    - [`virtio-mmmio` Removal](#virtio-mmmio-removal)
+    - [`virtio-mmio` Removal](#virtio-mmio-removal)
    - [Snapshot/Restore support for ARM64](#snapshotrestore-support-for-arm64)
    - [Improved Linux Boot Time](#improved-linux-boot-time)
    - [`SIGTERM/SIGINT` Interrupt Signal Handling](#sigtermsigint-interrupt-signal-handling)
    - [Default Log Level Changed](#default-log-level-changed)
    - [New `--balloon` Parameter Added](#new---balloon-parameter-added)
    - [Experimental `virtio-watchdog` Support](#experimental-virtio-watchdog-support)
-    - [Notable Bug Fixes](#notable-bug-fixes-2)
-    - [Contributors](#contributors-6)
+    - [Notable Bug Fixes](#notable-bug-fixes-5)
+    - [Contributors](#contributors-9)
 - [v0.10.0](#v0100)
    - [`virtio-block` Support for Multiple Descriptors](#virtio-block-support-for-multiple-descriptors)
    - [Memory Zones](#memory-zones)
    - [`Seccomp` Sandbox Improvements](#seccomp-sandbox-improvements)
    - [Preliminary KVM HyperV Emulation Control](#preliminary-kvm-hyperv-emulation-control)
-    - [Notable Bug Fixes](#notable-bug-fixes-3)
-    - [Contributors](#contributors-7)
+    - [Notable Bug Fixes](#notable-bug-fixes-6)
+    - [Contributors](#contributors-10)
 - [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)
@@ -77,17 +105,17 @@
    - [Enhancements to ARM64 Support](#enhancements-to-arm64-support)
    - [Intel SGX Support](#intel-sgx-support)
    - [`Seccomp` Sandbox Improvements](#seccomp-sandbox-improvements-1)
-    - [Notable Bug Fixes](#notable-bug-fixes-4)
-    - [Contributors](#contributors-8)
+    - [Notable Bug Fixes](#notable-bug-fixes-7)
+    - [Contributors](#contributors-11)
 - [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-5)
+    - [Notable Bug Fixes](#notable-bug-fixes-8)
    - [Command Line and API Changes](#command-line-and-api-changes)
-    - [Contributors](#contributors-9)
+    - [Contributors](#contributors-12)
 - [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)
@@ -97,14 +125,14 @@
    - [`Seccomp` Sandboxing](#seccomp-sandboxing)
    - [Updated Distribution Support](#updated-distribution-support)
    - [Command Line and API Changes](#command-line-and-api-changes-1)
-    - [Contributors](#contributors-10)
+    - [Contributors](#contributors-13)
 - [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-11)
+    - [Contributors](#contributors-14)
 - [v0.5.1](#v051)
 - [v0.5.0](#v050)
    - [Virtual Machine Dynamic Resizing](#virtual-machine-dynamic-resizing)
@@ -112,7 +140,7 @@
    - [New Interrupt Management Framework](#new-interrupt-management-framework)
    - [Development Tools](#development-tools)
    - [Kata Containers Integration](#kata-containers-integration)
-    - [Contributors](#contributors-12)
+    - [Contributors](#contributors-15)
 - [v0.4.0](#v040)
    - [Dynamic virtual CPUs addition](#dynamic-virtual-cpus-addition)
    - [Programmatic firmware tables generation](#programmatic-firmware-tables-generation)
@@ -121,7 +149,7 @@
    - [Userspace IOAPIC by default](#userspace-ioapic-by-default)
    - [PCI BAR reprogramming](#pci-bar-reprogramming)
    - [New `cloud-hypervisor` organization](#new-cloud-hypervisor-organization)
-    - [Contributors](#contributors-13)
+    - [Contributors](#contributors-16)
 - [v0.3.0](#v030)
    - [Block device offloading](#block-device-offloading)
    - [Network device backend](#network-device-backend)
@@ -148,6 +176,199 @@
    - [Unit testing](#unit-testing)
    - [Integration tests parallelization](#integration-tests-parallelization)

+# v20.0
+
+This release has been tracked through the [v20.0
+project](https://github.com/cloud-hypervisor/cloud-hypervisor/projects/23).
+
+### Multiple PCI segments support
+
+Cloud Hypervisor is no longer limited to 31 PCI devices. For both `x86_64` and
+`aarch64` architectures, it is now possible to create up to 16 PCI segments,
+increasing the total amount of supported PCI devices to 496.
+
+### CPU pinning
+
+For each vCPU, the user can define a limited set of host CPUs on which it is
+allowed to run. This can be useful when assigning a 1:1 mapping between host and
+guest resources, or when running a VM on a specific NUMA node.
+
+### Improved VFIO support
+
+Based on VFIO region capabilities, all regions can be memory mapped, limiting
+the amount of triggered VM exits, and therefore increasing the performance of
+the passthrough device.
+
+### Safer code
+
+Several sections containing unsafe Rust code have been replaced with safe
+alternatives, and multiple comments have been added to clarify why the remaining
+unsafe sections are safe to use.
+
+### Extended documentation
+
+The documentation related to VFIO has been updated while some new documents have
+been introduced to cover the usage of `--cpus` parameter as well as how to run
+Cloud Hypervisor on Intel TDX.
+
+### Notable bug fixes
+
+* Naturally align PCI BARs on relocation (#3244)
+* Fix panic in SIGWINCH listener thread when no seccomp filter set (#3338)
+* Use the tty raw mode implementation from libc (#3344)
+* Fix the emulation of register D for CMOS/RTC device (#3393)
+
+### Contributors
+
+Many thanks to everyone who has contributed to our release:
+
+* Alyssa Ross <hi@alyssa.is>
+* Bo Chen <chen.bo@intel.com>
+* Fabiano Fidêncio <fabiano.fidencio@intel.com>
+* Michael Zhao <michael.zhao@arm.com>
+* Muminul Islam <muislam@microsoft.com>
+* Rob Bradford <robert.bradford@intel.com>
+* Sebastien Boeuf <sebastien.boeuf@intel.com>
+* Wei Liu <liuwe@microsoft.com>
+* Willen Yang <willenyang@gmail.com>
+* William Douglas <william.douglas@intel.com>
+* Ziye Yang <ziye.yang@intel.com>
+
+# v19.0
+
+This release has been tracked through the [v19.0
+project](https://github.com/cloud-hypervisor/cloud-hypervisor/projects/22).
+
+### Improved PTY handling for serial and `virtio-console`
+
+The PTY support for serial has been enhanced with improved buffering when the
+the PTY is not yet connected to. Using `virtio-console` with PTY now results in
+the console being resized if the PTY window is also resized.
+
+### PCI boot time optimisations
+
+Multiple optimisations have been made to the PCI handling resulting in
+significant improvements in the boot time of the guest.
+
+### Improved TDX support
+
+When using the latest TDVF firmware the ACPI tables created by the VMM are now
+exposed via the firmware to the guest. 
+
+### Live migration enhancements
+
+Live migration support has been enhanced to support migration with `virtio-mem`
+based memory hotplug and the `virtio-balloon` device now supports live
+migration.
+
+### `virtio-mem` support with `vfio-user`
+
+The use of `vfio-user` userspaces devices can now be used in conjunction with
+`virtio-mem` based memory hotplug and unplug.
+
+### AArch64 for `virtio-iommu`
+
+A paravirtualised IOMMU can now be used on the AArch64 platform.
+
+### Notable bug fixes
+
+* ACPI hotplugged memory is correctly restored after a live migration or
+  snapshot/restore (#3165)
+* Multiple devices from the same IOMMU group can be passed through via VFIO
+  (#3078 #3113)
+* Live migration with large blocks of memory was buggy due to an in issue in
+  the underlying crate (#3157)
+
+### Contributors
+
+Many thanks to everyone who has contributed to our release:
+
+* Alyssa Ross <hi@alyssa.is>
+* Bo Chen <chen.bo@intel.com>
+* Henry Wang <Henry.Wang@arm.com>
+* Hui Zhu <teawater@antfin.com>
+* Jianyong Wu <jianyong.wu@arm.com>
+* Li Yu <liyu.yukiteru@bytedance.com>
+* Michael Zhao <michael.zhao@arm.com>
+* Muminul Islam <muislam@microsoft.com>
+* Rob Bradford <robert.bradford@intel.com>
+* Sebastien Boeuf <sebastien.boeuf@intel.com>
+* Wei Liu <liuwe@microsoft.com>
+* William Douglas <william.douglas@intel.com>
+* Yu Li <liyu.yukiteru@bytedance.com>
+
+# v18.0
+
+This release has been tracked through the [v18.0
+project](https://github.com/cloud-hypervisor/cloud-hypervisor/projects/21).
+
+### Experimental User Device (`vfio-user`) support
+
+Experimental support for running PCI devices in userspace via `vfio-user`
+has been included. This allows the use of the SPDK NVMe `vfio-user` controller
+with Cloud Hypervisor. This is enabled by `--user-device` on the command line.
+
+### Migration support for `vhost-user` devices
+
+Devices exposed into the VM via `vhost-user` can now be migrated using the live
+migration support. This requires support from the backend however the commonly
+used DPDK `vhost-user` backend does support this.
+
+### VHDX disk image support
+
+Images using the VHDX disk image format can now be used with Cloud Hypervisor.
+
+### Device pass through on MSHV hypervisor
+
+When running on the MSHV hypervisor it is possible to pass through devices from
+the host through to the guest (e.g with `--device`)
+
+### AArch64 for support `virtio-mem`
+
+The reference Linux kernel we recommend for using with Cloud Hypervisor now supports `virtio-mem` on AArch64.
+
+### Live migration on MSHV hypervisor
+
+Live migration is now supported when running on the MSHV hypervisor including
+efficient tracking of dirty pages.
+
+### AArch64 CPU topology support
+
+The CPU topology (as configured through `--cpu topology=`) can now be
+configured on AArch64 platforms and is conveyed through either ACPI or device
+tree.
+
+### Power button support on AArch64
+
+Use of the ACPI power button (e.g `ch-remote --api-socket=<API socket> power-button`) 
+is now supported when running on AArch64.
+
+### Notable bug fixes
+
+* Using two PTY outputs e.g. `--serial pty --console pty` now works correctly (#3012)
+* TTY input is now always sent to the correct destination (#3005)
+* The boot is no longer blocked when using a unattached PTY on the serial console (#3004)
+* Live migration is now supported on AArch64 (#3049)
+* Ensure signal handlers are run on the correct thread (#3069)
+
+### Contributors
+
+Many thanks to everyone who has contributed to our release:
+
+* Alyssa Ross <hi@alyssa.is>
+* Anatol Belski <anbelski@linux.microsoft.com>
+* Arafatms <arafatms@outlook.com>
+* Bo Chen <chen.bo@intel.com>
+* Fazla Mehrab <akm.fazla.mehrab@vt.edu>
+* Henry Wang <Henry.Wang@arm.com>
+* Jianyong Wu <jianyong.wu@arm.com>
+* Jiaqi Gao <jiaqi.gao@intel.com>
+* Markus Theil <markus.theil@tu-ilmenau.de>
+* Muminul Islam <muislam@microsoft.com>
+* Rob Bradford <robert.bradford@intel.com>
+* Sebastien Boeuf <sebastien.boeuf@intel.com>
+* Wei Liu <liuwe@microsoft.com>
+* Yu Li <liyu.yukiteru@bytedance.com>

 # v17.0

@@ -546,7 +767,7 @@ Automatically spawning a `vhost-user-net` or `vhost-user-block` backend is now
 deprecated. Users of this functionality will receive a warning and should make
 adjustments. The functionality will be removed in the next release.

-### `virtio-mmmio` Removal
+### `virtio-mmio` Removal

 Support for using the `virtio-mmio` transport, rather than using PCI, has been
 removed. This has been to simplify the code and significantly
@@ -1089,7 +1310,7 @@ Highlights for `cloud-hypervisor` version 0.4.0 include:

 ### Dynamic virtual CPUs addition

-As a way to vertically scale Cloud-Hypervisor guests, we now support dynamically
+As a way to vertically scale Cloud Hypervisor guests, we now support dynamically
 adding virtual CPUs to the guests, a mechanism also known as CPU hot plug.
 Through hardware-reduced ACPI notifications, Cloud Hypervisor can now add CPUs
 to an already running guest and the high level operations for that process are
--- a/resources/Dockerfile
+++ b/resources/Dockerfile
@@ -1,7 +1,7 @@
 FROM ubuntu:20.04 as dev

 ARG TARGETARCH
-ARG RUST_TOOLCHAIN="1.52.1"
+ARG RUST_TOOLCHAIN="1.56.1"
 ARG CLH_SRC_DIR="/cloud-hypervisor"
 ARG CLH_BUILD_DIR="$CLH_SRC_DIR/build"
 ARG CARGO_REGISTRY_DIR="$CLH_BUILD_DIR/cargo_registry"
@@ -59,9 +59,19 @@ RUN if [ "$TARGETARCH" = "amd64" ]; then \
 RUN if [ "$TARGETARCH" = "arm64" ]; then \
        # On AArch64, `setcap` binary should be installed via `libcap2-bin`.
        # The `setcap` binary is used in integration tests.
+        # `libguestfs-tools` is used for modifying cloud image kernel, and it requires
+        # kernel (any version) image in `/boot` and modules in `/lib/modules`.
        apt-get update \
        && apt-get -yq upgrade \
-        && DEBIAN_FRONTEND=noninteractive apt-get install -yq libcap2-bin \
+        && DEBIAN_FRONTEND=noninteractive apt-get install -yq \
+        libcap2-bin \
+        libguestfs-tools \
+        linux-image-5.8.0-63-generic \
+        autotools-dev \
+        autoconf \
+        automake \
+        perl \
+        texinfo \
        && apt-get clean \
        && rm -rf /var/lib/apt/lists/*;	fi

@@ -91,3 +101,30 @@ RUN export ARCH="$(uname -m)" \
 RUN echo 'source $CARGO_HOME/env' >> $HOME/.bashrc \
    && mkdir $HOME/.cargo \
    && ln -s $CARGO_HOME/env $HOME/.cargo/env
+
+# install virtiofsd
+RUN git clone --depth 1 https://gitlab.com/virtio-fs/qemu.git -b qemu5.0-virtiofs-dax \
+    && cd qemu \
+    && ./configure --prefix=$PWD --target-list=x86_64-softmmu \
+    && make virtiofsd -j `nproc` \
+    && cp virtiofsd /usr/local/bin \
+    && cd .. && rm -rf qemu
+
+# install SPDK NVMe
+# only for 'x86_64' platform images as 'docker buildx' can't build 'spdk'
+RUN if [ "$TARGETARCH" = "amd64" ]; then \
+       git clone https://github.com/spdk/spdk \
+       && cd spdk \
+       && git checkout a827fd7eeca67209d4c0aaad9a3ed55692e7e36e \
+       && git submodule update --init \
+       && sed -i 's/pip3 install meson/pip3 install meson==0.59.2/g'  scripts/pkgdep/ubuntu.sh \
+       && sed -i 's/meson/meson==0.59.2/g'  scripts/pkgdep/requirements.txt \
+       && apt-get update \
+       && ./scripts/pkgdep.sh \
+       && ./configure --with-vfio-user \
+       && make -j `nproc` \
+       && mkdir /usr/local/bin/spdk-nvme \
+       && cp ./build/bin/nvmf_tgt /usr/local/bin/spdk-nvme \
+       && cp ./scripts/rpc.py /usr/local/bin/spdk-nvme \
+       && cp -r ./scripts/rpc /usr/local/bin/spdk-nvme \
+       && cd .. && rm -rf spdk; fi
--- a/resources/linux-config-aarch64
+++ b/resources/linux-config-aarch64
@@ -1,11 +1,13 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/arm64 5.12.0 Kernel Configuration
+# Linux/arm64 5.14.0 Kernel Configuration
 #
 CONFIG_CC_VERSION_TEXT="gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0"
 CONFIG_CC_IS_GCC=y
 CONFIG_GCC_VERSION=90300
 CONFIG_CLANG_VERSION=0
+CONFIG_AS_IS_GNU=y
+CONFIG_AS_VERSION=23400
 CONFIG_LD_IS_BFD=y
 CONFIG_LD_VERSION=23400
 CONFIG_LLD_VERSION=0
@@ -13,6 +15,7 @@ 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_NO_PROFILE_FN_ATTR=y
 CONFIG_IRQ_WORK=y
 CONFIG_BUILDTIME_TABLE_SORT=y
 CONFIG_THREAD_INFO_IN_TASK=y
@@ -60,7 +63,6 @@ CONFIG_SPARSE_IRQ=y
 # CONFIG_GENERIC_IRQ_DEBUGFS is not set
 # end of IRQ subsystem

-CONFIG_GENERIC_IRQ_MULTI_HANDLER=y
 CONFIG_GENERIC_TIME_VSYSCALL=y
 CONFIG_GENERIC_CLOCKEVENTS=y
 CONFIG_ARCH_HAS_TICK_BROADCAST=y
@@ -78,9 +80,22 @@ CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
 # end of Timers subsystem

+CONFIG_BPF=y
+CONFIG_HAVE_EBPF_JIT=y
+CONFIG_ARCH_WANT_DEFAULT_BPF_JIT=y
+
+#
+# BPF subsystem
+#
+CONFIG_BPF_SYSCALL=y
+# CONFIG_BPF_UNPRIV_DEFAULT_OFF is not set
+# CONFIG_BPF_PRELOAD is not set
+# end of BPF subsystem
+
 CONFIG_PREEMPT_NONE=y
 # CONFIG_PREEMPT_VOLUNTARY is not set
 # CONFIG_PREEMPT is not set
+# CONFIG_SCHED_CORE is not set

 #
 # CPU/Task time and stats accounting
@@ -151,6 +166,7 @@ CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
 CONFIG_CGROUP_PERF=y
 CONFIG_CGROUP_BPF=y
+# CONFIG_CGROUP_MISC is not set
 # CONFIG_CGROUP_DEBUG is not set
 CONFIG_SOCK_CGROUP_DATA=y
 CONFIG_NAMESPACES=y
@@ -179,7 +195,6 @@ CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
 CONFIG_LD_ORPHAN_WARN=y
 CONFIG_SYSCTL=y
 CONFIG_SYSCTL_EXCEPTION_TRACE=y
-CONFIG_BPF=y
 CONFIG_EXPERT=y
 CONFIG_MULTIUSER=y
 CONFIG_SGETMASK_SYSCALL=y
@@ -202,13 +217,11 @@ CONFIG_SHMEM=y
 CONFIG_AIO=y
 CONFIG_IO_URING=y
 CONFIG_ADVISE_SYSCALLS=y
+CONFIG_HAVE_ARCH_USERFAULTFD_MINOR=y
 CONFIG_MEMBARRIER=y
 CONFIG_KALLSYMS=y
 # CONFIG_KALLSYMS_ALL is not set
 CONFIG_KALLSYMS_BASE_RELATIVE=y
-CONFIG_BPF_SYSCALL=y
-CONFIG_ARCH_WANT_DEFAULT_BPF_JIT=y
-# CONFIG_BPF_PRELOAD is not set
 CONFIG_USERFAULTFD=y
 CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
 # CONFIG_KCMP is not set
@@ -258,10 +271,7 @@ CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
 CONFIG_GENERIC_HWEIGHT=y
 CONFIG_GENERIC_CSUM=y
 CONFIG_GENERIC_CALIBRATE_DELAY=y
-CONFIG_ZONE_DMA=y
-CONFIG_ZONE_DMA32=y
-CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
-CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
+CONFIG_ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE=y
 CONFIG_SMP=y
 CONFIG_KERNEL_MODE_NEON=y
 CONFIG_FIX_EARLYCON_MEM=y
@@ -273,10 +283,9 @@ CONFIG_ARCH_PROC_KCORE_TEXT=y
 # Platform selection
 #
 # CONFIG_ARCH_ACTIONS is not set
-# CONFIG_ARCH_AGILEX is not set
-# CONFIG_ARCH_N5X is not set
 # CONFIG_ARCH_SUNXI is not set
 # CONFIG_ARCH_ALPINE is not set
+# CONFIG_ARCH_APPLE is not set
 # CONFIG_ARCH_BCM2835 is not set
 # CONFIG_ARCH_BCM4908 is not set
 # CONFIG_ARCH_BCM_IPROC is not set
@@ -300,7 +309,7 @@ CONFIG_ARCH_PROC_KCORE_TEXT=y
 # CONFIG_ARCH_ROCKCHIP is not set
 # CONFIG_ARCH_S32 is not set
 # CONFIG_ARCH_SEATTLE is not set
-# CONFIG_ARCH_STRATIX10 is not set
+# CONFIG_ARCH_INTEL_SOCFPGA is not set
 # CONFIG_ARCH_SYNQUACER is not set
 # CONFIG_ARCH_TEGRA is not set
 # CONFIG_ARCH_SPRD is not set
@@ -328,6 +337,7 @@ CONFIG_ARM64_ERRATUM_819472=y
 CONFIG_ARM64_ERRATUM_832075=y
 CONFIG_ARM64_ERRATUM_834220=y
 CONFIG_ARM64_ERRATUM_843419=y
+CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419=y
 CONFIG_ARM64_ERRATUM_1024718=y
 CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT=y
 CONFIG_ARM64_ERRATUM_1165522=y
@@ -373,7 +383,6 @@ CONFIG_NODES_SHIFT=10
 CONFIG_USE_PERCPU_NUMA_NODE_ID=y
 CONFIG_HAVE_SETUP_PER_CPU_AREA=y
 CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
-CONFIG_HOLES_IN_ZONE=y
 # CONFIG_HZ_100 is not set
 CONFIG_HZ_250=y
 # CONFIG_HZ_300 is not set
@@ -381,12 +390,8 @@ CONFIG_HZ_250=y
 CONFIG_HZ=250
 CONFIG_SCHED_HRTICK=y
 CONFIG_ARCH_SPARSEMEM_ENABLE=y
-CONFIG_ARCH_SPARSEMEM_DEFAULT=y
-CONFIG_ARCH_SELECT_MEMORY_MODEL=y
 CONFIG_HW_PERF_EVENTS=y
-CONFIG_SYS_SUPPORTS_HUGETLBFS=y
-CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
-CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
+CONFIG_ARCH_HAS_FILTER_PGPROT=y
 CONFIG_PARAVIRT=y
 CONFIG_PARAVIRT_TIME_ACCOUNTING=y
 # CONFIG_KEXEC is not set
@@ -411,7 +416,6 @@ CONFIG_AS_HAS_LDAPR=y
 CONFIG_AS_HAS_LSE_ATOMICS=y
 CONFIG_ARM64_LSE_ATOMICS=y
 CONFIG_ARM64_USE_LSE_ATOMICS=y
-CONFIG_ARM64_VHE=y
 # end of ARMv8.1 architectural features

 #
@@ -426,10 +430,9 @@ CONFIG_ARM64_CNP=y
 # ARMv8.3 architectural features
 #
 CONFIG_ARM64_PTR_AUTH=y
-CONFIG_CC_HAS_BRANCH_PROT_PAC_RET=y
+CONFIG_ARM64_PTR_AUTH_KERNEL=y
 CONFIG_CC_HAS_SIGN_RETURN_ADDRESS=y
 CONFIG_AS_HAS_PAC=y
-CONFIG_AS_HAS_CFI_NEGATE_RA_STATE=y
 # end of ARMv8.3 architectural features

 #
@@ -443,22 +446,22 @@ CONFIG_ARM64_TLB_RANGE=y
 #
 # ARMv8.5 architectural features
 #
-CONFIG_AS_HAS_ARMV8_5=y
 CONFIG_ARM64_BTI=y
-CONFIG_CC_HAS_BRANCH_PROT_PAC_RET_BTI=y
 CONFIG_ARM64_E0PD=y
 CONFIG_ARCH_RANDOM=y
-CONFIG_ARM64_AS_HAS_MTE=y
-CONFIG_ARM64_MTE=y
 # end of ARMv8.5 architectural features

+#
+# ARMv8.7 architectural features
+#
+CONFIG_ARM64_EPAN=y
+# end of ARMv8.7 architectural features
+
 CONFIG_ARM64_SVE=y
 # CONFIG_ARM64_PSEUDO_NMI is not set
 CONFIG_RELOCATABLE=y
 CONFIG_RANDOMIZE_BASE=y
 CONFIG_RANDOMIZE_MODULE_REGION_FULL=y
-CONFIG_CC_HAVE_STACKPROTECTOR_SYSREG=y
-CONFIG_STACKPROTECTOR_PER_TASK=y
 # end of Kernel Features

 #
@@ -471,9 +474,6 @@ CONFIG_EFI=y
 CONFIG_DMI=y
 # end of Boot options

-CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
-CONFIG_ARCH_ENABLE_THP_MIGRATION=y
-
 #
 # Power management options
 #
@@ -553,6 +553,7 @@ CONFIG_FIRMWARE_MEMMAP=y
 CONFIG_DMIID=y
 CONFIG_DMI_SYSFS=y
 # CONFIG_FW_CFG_SYSFS is not set
+# CONFIG_ARM_FFA_TRANSPORT is not set
 # CONFIG_GOOGLE_FIRMWARE is not set

 #
@@ -623,6 +624,7 @@ CONFIG_ACPI_IORT=y
 CONFIG_ACPI_GTDT=y
 CONFIG_ACPI_PPTT=y
 # CONFIG_PMIC_OPREGION is not set
+CONFIG_ACPI_VIOT=y
 CONFIG_IRQ_BYPASS_MANAGER=y
 CONFIG_VIRTUALIZATION=y
 CONFIG_KVM=y
@@ -661,6 +663,7 @@ CONFIG_ARCH_HAS_KEEPINITRD=y
 CONFIG_ARCH_HAS_SET_MEMORY=y
 CONFIG_ARCH_HAS_SET_DIRECT_MAP=y
 CONFIG_HAVE_ARCH_THREAD_STRUCT_WHITELIST=y
+CONFIG_ARCH_WANTS_NO_INSTR=y
 CONFIG_HAVE_ASM_MODVERSIONS=y
 CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
 CONFIG_HAVE_RSEQ=y
@@ -688,6 +691,7 @@ CONFIG_STACKPROTECTOR_STRONG=y
 CONFIG_ARCH_SUPPORTS_LTO_CLANG=y
 CONFIG_ARCH_SUPPORTS_LTO_CLANG_THIN=y
 CONFIG_LTO_NONE=y
+CONFIG_ARCH_SUPPORTS_CFI_CLANG=y
 CONFIG_HAVE_CONTEXT_TRACKING=y
 CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
 CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
@@ -705,6 +709,8 @@ CONFIG_CLONE_BACKWARDS=y
 # CONFIG_COMPAT_32BIT_TIME is not set
 CONFIG_HAVE_ARCH_VMAP_STACK=y
 CONFIG_VMAP_STACK=y
+CONFIG_HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET=y
+# CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT is not set
 CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y
 CONFIG_STRICT_KERNEL_RWX=y
 CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
@@ -742,9 +748,10 @@ CONFIG_BLK_DEV_THROTTLING=y
 # CONFIG_BLK_DEV_THROTTLING_LOW is not set
 CONFIG_BLK_CMDLINE_PARSER=y
 CONFIG_BLK_WBT=y
+CONFIG_BLK_WBT_MQ=y
 # CONFIG_BLK_CGROUP_IOLATENCY is not set
 # CONFIG_BLK_CGROUP_IOCOST is not set
-CONFIG_BLK_WBT_MQ=y
+# CONFIG_BLK_CGROUP_IOPRIO is not set
 CONFIG_BLK_DEBUG_FS=y
 # CONFIG_BLK_SED_OPAL is not set
 # CONFIG_BLK_INLINE_ENCRYPTION is not set
@@ -863,10 +870,7 @@ CONFIG_COREDUMP=y
 #
 # Memory Management options
 #
-CONFIG_SELECT_MEMORY_MODEL=y
-CONFIG_SPARSEMEM_MANUAL=y
 CONFIG_SPARSEMEM=y
-CONFIG_NEED_MULTIPLE_NODES=y
 CONFIG_SPARSEMEM_EXTREME=y
 CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
 CONFIG_SPARSEMEM_VMEMMAP=y
@@ -874,19 +878,24 @@ CONFIG_HAVE_FAST_GUP=y
 CONFIG_ARCH_KEEP_MEMBLOCK=y
 CONFIG_NUMA_KEEP_MEMINFO=y
 CONFIG_MEMORY_ISOLATION=y
+CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
 CONFIG_MEMORY_HOTPLUG=y
 CONFIG_MEMORY_HOTPLUG_SPARSE=y
-# CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE is not set
+CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE=y
+CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
 CONFIG_MEMORY_HOTREMOVE=y
+CONFIG_MHP_MEMMAP_ON_MEMORY=y
 CONFIG_SPLIT_PTLOCK_CPUS=4
+CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
 CONFIG_MEMORY_BALLOON=y
 CONFIG_BALLOON_COMPACTION=y
 CONFIG_COMPACTION=y
 CONFIG_PAGE_REPORTING=y
 CONFIG_MIGRATION=y
+CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
+CONFIG_ARCH_ENABLE_THP_MIGRATION=y
 CONFIG_CONTIG_ALLOC=y
 CONFIG_PHYS_ADDR_T_64BIT=y
-CONFIG_BOUNCE=y
 CONFIG_MMU_NOTIFIER=y
 CONFIG_KSM=y
 CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
@@ -919,15 +928,19 @@ CONFIG_ZSMALLOC_STAT=y
 CONFIG_GENERIC_EARLY_IOREMAP=y
 # CONFIG_DEFERRED_STRUCT_PAGE_INIT is not set
 # CONFIG_IDLE_PAGE_TRACKING is not set
+CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
 CONFIG_ARCH_HAS_PTE_DEVMAP=y
+CONFIG_ARCH_HAS_ZONE_DMA_SET=y
+CONFIG_ZONE_DMA=y
+CONFIG_ZONE_DMA32=y
 CONFIG_ZONE_DEVICE=y
 CONFIG_DEV_PAGEMAP_OPS=y
 # CONFIG_DEVICE_PRIVATE is not set
-CONFIG_ARCH_USES_HIGH_VMA_FLAGS=y
 CONFIG_PERCPU_STATS=y
 # CONFIG_GUP_TEST is not set
 # CONFIG_READ_ONLY_THP_FOR_FS is not set
 CONFIG_ARCH_HAS_PTE_SPECIAL=y
+CONFIG_SECRETMEM=y
 # end of Memory Management options

 CONFIG_NET=y
@@ -991,7 +1004,6 @@ CONFIG_NET_PTP_CLASSIFY=y
 # CONFIG_ATM is not set
 # CONFIG_L2TP is not set
 # CONFIG_BRIDGE is not set
-CONFIG_HAVE_NET_DSA=y
 # CONFIG_NET_DSA is not set
 # CONFIG_VLAN_8021Q is not set
 # CONFIG_DECNET is not set
@@ -1019,6 +1031,7 @@ CONFIG_VIRTIO_VSOCKETS_COMMON=y
 # CONFIG_NET_L3_MASTER_DEV is not set
 # CONFIG_QRTR is not set
 # CONFIG_NET_NCSI is not set
+CONFIG_PCPU_DEV_REFCNT=y
 CONFIG_RPS=y
 CONFIG_RFS_ACCEL=y
 CONFIG_SOCK_RX_QUEUE_MAPPING=y
@@ -1056,7 +1069,6 @@ CONFIG_GRO_CELLS=y
 CONFIG_NET_SOCK_MSG=y
 CONFIG_FAILOVER=y
 # CONFIG_ETHTOOL_NETLINK is not set
-CONFIG_HAVE_EBPF_JIT=y

 #
 # Device Drivers
@@ -1128,7 +1140,6 @@ CONFIG_PCI_HOST_GENERIC=y
 #
 # Mobiveil PCIe Core Support
 #
-# CONFIG_PCIE_LAYERSCAPE_GEN4 is not set
 # end of Mobiveil PCIe Core Support

 #
@@ -1229,7 +1240,6 @@ CONFIG_ZRAM_DEF_COMP_LZORLE=y
 CONFIG_ZRAM_DEF_COMP="lzo-rle"
 # CONFIG_ZRAM_WRITEBACK is not set
 # CONFIG_ZRAM_MEMORY_TRACKING is not set
-# CONFIG_BLK_DEV_UMEM is not set
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
 CONFIG_BLK_DEV_CRYPTOLOOP=y
@@ -1250,6 +1260,7 @@ CONFIG_VIRTIO_BLK=y
 #
 # CONFIG_BLK_DEV_NVME is not set
 # CONFIG_NVME_FC is not set
+# CONFIG_NVME_TCP is not set
 # CONFIG_NVME_TARGET is not set
 # end of NVME Support

@@ -1262,9 +1273,9 @@ CONFIG_VIRTIO_BLK=y
 # CONFIG_ENCLOSURE_SERVICES is not set
 # CONFIG_HP_ILO is not set
 # CONFIG_SRAM is not set
+# CONFIG_DW_XDATA_PCIE is not set
 # CONFIG_PCI_ENDPOINT_TEST is not set
 # CONFIG_XILINX_SDFEC is not set
-# CONFIG_PVPANIC is not set
 # CONFIG_C2PORT is not set

 #
@@ -1291,6 +1302,7 @@ CONFIG_VIRTIO_BLK=y
 # CONFIG_MISC_RTSX_PCI is not set
 # CONFIG_HABANA_AI is not set
 # CONFIG_UACCE is not set
+# CONFIG_PVPANIC is not set
 # end of Misc devices

 #
@@ -1335,13 +1347,6 @@ CONFIG_VETH=y
 CONFIG_VIRTIO_NET=y
 # CONFIG_NLMON is not set
 # CONFIG_ARCNET is not set
-
-#
-# Distributed Switch Architecture drivers
-#
-# CONFIG_NET_DSA_MV88E6XXX_PTP is not set
-# end of Distributed Switch Architecture drivers
-
 # CONFIG_ETHERNET is not set
 # CONFIG_FDDI is not set
 # CONFIG_HIPPI is not set
@@ -1362,6 +1367,13 @@ CONFIG_VIRTIO_NET=y
 #
 # CONFIG_WLAN is not set
 # CONFIG_WAN is not set
+
+#
+# Wireless WAN
+#
+# CONFIG_WWAN is not set
+# end of Wireless WAN
+
 # CONFIG_VMXNET3 is not set
 # CONFIG_FUJITSU_ES is not set
 # CONFIG_NETDEVSIM is not set
@@ -1497,7 +1509,6 @@ CONFIG_SERIAL_MCTRL_GPIO=y
 # 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_HVC_DCC is not set
 CONFIG_SERIAL_DEV_BUS=y
@@ -1514,8 +1525,6 @@ CONFIG_HW_RANDOM_CAVIUM=y
 # CONFIG_HW_RANDOM_XIPHERA is not set
 # CONFIG_APPLICOM is not set
 CONFIG_DEVMEM=y
-CONFIG_RAW_DRIVER=y
-CONFIG_MAX_RAW_DEVS=256
 CONFIG_DEVPORT=y
 # CONFIG_TCG_TPM is not set
 # CONFIG_XILLYBUS is not set
@@ -1556,6 +1565,7 @@ 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_OCP is not set
 # end of PTP clock support

@@ -1632,6 +1642,7 @@ CONFIG_POWER_SUPPLY=y
 # CONFIG_CHARGER_MAX8903 is not set
 # CONFIG_CHARGER_GPIO is not set
 # CONFIG_CHARGER_LT3651 is not set
+# CONFIG_BATTERY_GOLDFISH is not set
 # CONFIG_HWMON is not set
 CONFIG_THERMAL=y
 # CONFIG_THERMAL_NETLINK is not set
@@ -1655,6 +1666,7 @@ CONFIG_WATCHDOG_CORE=y
 CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED=y
 CONFIG_WATCHDOG_OPEN_TIMEOUT=0
 # CONFIG_WATCHDOG_SYSFS is not set
+# CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT is not set

 #
 # Watchdog Pretimeout Governors
@@ -1705,7 +1717,6 @@ CONFIG_BCMA_POSSIBLE=y
 # CONFIG_MFD_MT6397 is not set
 # CONFIG_MFD_RDC321X is not set
 # CONFIG_MFD_SM501 is not set
-# CONFIG_ABX500_CORE is not set
 # CONFIG_MFD_SYSCON is not set
 # CONFIG_MFD_TI_AM335X_TSCADC is not set
 # CONFIG_MFD_TQMX86 is not set
@@ -1869,6 +1880,7 @@ CONFIG_HID_REDRAGON=y
 # CONFIG_HID_PRIMAX is not set
 # CONFIG_HID_SAITEK is not set
 # CONFIG_HID_SAMSUNG is not set
+# CONFIG_HID_SEMITEK is not set
 # CONFIG_HID_SPEEDLINK is not set
 # CONFIG_HID_STEAM is not set
 # CONFIG_HID_STEELSERIES is not set
@@ -1878,7 +1890,6 @@ CONFIG_HID_REDRAGON=y
 # CONFIG_HID_SMARTJOYPLUS is not set
 # CONFIG_HID_TIVO is not set
 # CONFIG_HID_TOPSEED is not set
-# CONFIG_HID_THRUSTMASTER is not set
 # CONFIG_HID_UDRAW_PS3 is not set
 # CONFIG_HID_XINMO is not set
 # CONFIG_HID_ZEROPLUS is not set
@@ -1936,7 +1947,7 @@ CONFIG_RTC_INTF_DEV=y
 # CONFIG_RTC_DRV_DS1685_FAMILY is not set
 # CONFIG_RTC_DRV_DS1742 is not set
 # CONFIG_RTC_DRV_DS2404 is not set
-# CONFIG_RTC_DRV_EFI is not set
+CONFIG_RTC_DRV_EFI=y
 # CONFIG_RTC_DRV_STK17TA8 is not set
 # CONFIG_RTC_DRV_M48T86 is not set
 # CONFIG_RTC_DRV_M48T35 is not set
@@ -2033,6 +2044,7 @@ CONFIG_VIRTIO_PCI=y
 CONFIG_VIRTIO_PCI_LEGACY=y
 CONFIG_VIRTIO_PMEM=y
 CONFIG_VIRTIO_BALLOON=y
+CONFIG_VIRTIO_MEM=y
 CONFIG_VIRTIO_INPUT=y
 CONFIG_VIRTIO_MMIO=y
 CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
@@ -2048,15 +2060,23 @@ CONFIG_VHOST_MENU=y
 # end of Microsoft Hyper-V guest support

 # CONFIG_GREYBUS is not set
+# CONFIG_COMEDI is not set
 # CONFIG_STAGING is not set
 # CONFIG_GOLDFISH is not set
 # CONFIG_CHROME_PLATFORMS is not set
 # CONFIG_MELLANOX_PLATFORM is not set
 # CONFIG_SURFACE_PLATFORMS is not set
 CONFIG_HAVE_CLK=y
-CONFIG_CLKDEV_LOOKUP=y
 CONFIG_HAVE_CLK_PREPARE=y
 CONFIG_COMMON_CLK=y
+
+#
+# Clock driver for ARM Reference designs
+#
+# CONFIG_ICST is not set
+# CONFIG_CLK_SP810 is not set
+# end of Clock driver for ARM Reference designs
+
 # CONFIG_COMMON_CLK_AXI_CLKGEN is not set
 # CONFIG_COMMON_CLK_XGENE is not set
 # CONFIG_COMMON_CLK_FIXED_MMIO is not set
@@ -2104,9 +2124,6 @@ CONFIG_IOMMU_DMA=y
 # CONFIG_ARM_SMMU is not set
 # CONFIG_ARM_SMMU_V3 is not set
 CONFIG_VIRTIO_IOMMU=y
-CONFIG_VIRTIO_IOMMU_TOPOLOGY_HELPERS=y
-CONFIG_VIRTIO_IOMMU_TOPOLOGY=y
-CONFIG_ACPI_VIOT=y

 #
 # Remoteproc drivers
@@ -2199,6 +2216,7 @@ CONFIG_PARTITION_PERCPU=y
 #
 # CONFIG_GENERIC_PHY is not set
 # CONFIG_PHY_XGENE is not set
+# CONFIG_PHY_CAN_TRANSCEIVER is not set
 # CONFIG_BCM_KONA_USB2_PHY is not set
 # CONFIG_PHY_CADENCE_TORRENT is not set
 # CONFIG_PHY_CADENCE_DPHY is not set
@@ -2327,6 +2345,8 @@ CONFIG_OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW=y
 #
 # Caches
 #
+CONFIG_NETFS_SUPPORT=y
+# CONFIG_NETFS_STATS is not set
 CONFIG_FSCACHE=y
 # CONFIG_FSCACHE_STATS is not set
 # CONFIG_FSCACHE_HISTOGRAM is not set
@@ -2371,6 +2391,7 @@ CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y
 CONFIG_TMPFS_XATTR=y
 # CONFIG_TMPFS_INODE64 is not set
+CONFIG_ARCH_SUPPORTS_HUGETLBFS=y
 CONFIG_HUGETLBFS=y
 CONFIG_HUGETLB_PAGE=y
 CONFIG_MEMFD_CREATE=y
@@ -2545,6 +2566,7 @@ CONFIG_CRYPTO_CRYPTD=y
 # CONFIG_CRYPTO_RSA is not set
 # CONFIG_CRYPTO_DH is not set
 # CONFIG_CRYPTO_ECDH is not set
+# CONFIG_CRYPTO_ECDSA is not set
 # CONFIG_CRYPTO_ECRDSA is not set
 # CONFIG_CRYPTO_SM2 is not set
 # CONFIG_CRYPTO_CURVE25519 is not set
@@ -2673,6 +2695,8 @@ CONFIG_SYSTEM_BLACKLIST_KEYRING=y
 CONFIG_SYSTEM_BLACKLIST_HASH_LIST=""
 # end of Certificates for signature checking

+CONFIG_BINARY_PRINTF=y
+
 #
 # Library routines
 #
@@ -2682,6 +2706,7 @@ CONFIG_HAVE_ARCH_BITREVERSE=y
 CONFIG_GENERIC_STRNCPY_FROM_USER=y
 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
@@ -2770,7 +2795,6 @@ CONFIG_FONT_8x16=y
 CONFIG_MEMREGION=y
 CONFIG_ARCH_STACKWALK=y
 CONFIG_SBITMAP=y
-# CONFIG_STRING_SELFTEST is not set
 # end of Library routines

 CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED=y
@@ -2784,6 +2808,7 @@ CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED=y
 #
 CONFIG_PRINTK_TIME=y
 # CONFIG_PRINTK_CALLER is not set
+# CONFIG_STACKTRACE_BUILD_ID is not set
 CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
 CONFIG_CONSOLE_LOGLEVEL_QUIET=4
 CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
@@ -2804,9 +2829,10 @@ CONFIG_STRIP_ASM_SYMS=y
 # CONFIG_HEADERS_INSTALL is not set
 CONFIG_DEBUG_SECTION_MISMATCH=y
 CONFIG_SECTION_MISMATCH_WARN_ONLY=y
-# CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B is not set
+# CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B is not set
 CONFIG_ARCH_WANT_FRAME_POINTERS=y
 CONFIG_FRAME_POINTER=y
+# CONFIG_VMLINUX_MAP is not set
 # CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
 # end of Compile-time checks and compiler options

@@ -2858,10 +2884,8 @@ CONFIG_DEBUG_MEMORY_INIT=y
 # CONFIG_DEBUG_PER_CPU_MAPS is not set
 CONFIG_HAVE_ARCH_KASAN=y
 CONFIG_HAVE_ARCH_KASAN_SW_TAGS=y
-CONFIG_HAVE_ARCH_KASAN_HW_TAGS=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_HAVE_ARCH_KFENCE=y
 # CONFIG_KFENCE is not set
 # end of Memory Debugging
@@ -2913,7 +2937,6 @@ CONFIG_LOCK_DEBUGGING_SUPPORT=y
 CONFIG_STACKTRACE=y
 # CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
 # CONFIG_DEBUG_KOBJECT is not set
-CONFIG_HAVE_DEBUG_BUGVERBOSE=y

 #
 # Debug kernel data structures
@@ -2945,7 +2968,6 @@ CONFIG_RCU_CPU_STALL_TIMEOUT=59
 CONFIG_HAVE_FUNCTION_TRACER=y
 CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
 CONFIG_HAVE_DYNAMIC_FTRACE=y
-CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
 CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
 CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
 CONFIG_HAVE_C_RECORDMCOUNT=y
@@ -2973,19 +2995,21 @@ CONFIG_CC_HAS_SANCOV_TRACE_PC=y
 # CONFIG_KCOV is not set
 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_TEST_DIV64 is not set
 # CONFIG_BACKTRACE_SELF_TEST is not set
 # CONFIG_RBTREE_TEST is not set
 # CONFIG_REED_SOLOMON_TEST is not set
 # CONFIG_INTERVAL_TREE_TEST is not set
 # CONFIG_ATOMIC64_SELFTEST is not set
 # CONFIG_TEST_HEXDUMP is not set
+# CONFIG_STRING_SELFTEST is not set
 # CONFIG_TEST_STRING_HELPERS is not set
 # CONFIG_TEST_STRSCPY is not set
 # CONFIG_TEST_KSTRTOX is not set
 # CONFIG_TEST_PRINTF is not set
+# CONFIG_TEST_SCANF is not set
 # CONFIG_TEST_BITMAP is not set
 # CONFIG_TEST_UUID is not set
 # CONFIG_TEST_XARRAY is not set
@@ -3001,6 +3025,7 @@ CONFIG_RUNTIME_TESTING_MENU=y
 # CONFIG_TEST_STACKINIT is not set
 # CONFIG_TEST_MEMINIT is not set
 # CONFIG_TEST_FREE_PAGES is not set
+CONFIG_ARCH_USE_MEMTEST=y
 # CONFIG_MEMTEST is not set
 # end of Kernel Testing and Coverage
 # end of Kernel hacking
--- a/resources/linux-config-x86_64
+++ b/resources/linux-config-x86_64
@@ -1,10 +1,10 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 5.13.0-rc5 Kernel Configuration
+# Linux/x86 5.14.0 Kernel Configuration
 #
-CONFIG_CC_VERSION_TEXT="gcc (Ubuntu 10.2.0-13ubuntu1) 10.2.0"
+CONFIG_CC_VERSION_TEXT="gcc (Ubuntu 10.3.0-1ubuntu1) 10.3.0"
 CONFIG_CC_IS_GCC=y
-CONFIG_GCC_VERSION=100200
+CONFIG_GCC_VERSION=100300
 CONFIG_CLANG_VERSION=0
 CONFIG_AS_IS_GNU=y
 CONFIG_AS_VERSION=23500
@@ -15,6 +15,7 @@ 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_NO_PROFILE_FN_ATTR=y
 CONFIG_IRQ_WORK=y
 CONFIG_BUILDTIME_TABLE_SORT=y
 CONFIG_THREAD_INFO_IN_TASK=y
@@ -114,6 +115,7 @@ CONFIG_BPF_SYSCALL=y
 CONFIG_PREEMPT_NONE=y
 # CONFIG_PREEMPT_VOLUNTARY is not set
 # CONFIG_PREEMPT is not set
+# CONFIG_SCHED_CORE is not set

 #
 # CPU/Task time and stats accounting
@@ -299,7 +301,6 @@ CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
 CONFIG_ARCH_HIBERNATION_POSSIBLE=y
 CONFIG_ARCH_SUSPEND_POSSIBLE=y
 CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
-CONFIG_ZONE_DMA32=y
 CONFIG_AUDIT_ARCH=y
 CONFIG_X86_64_SMP=y
 CONFIG_ARCH_SUPPORTS_UPROBES=y
@@ -311,7 +312,6 @@ CONFIG_CC_HAS_SANE_STACKPROTECTOR=y
 #
 # Processor type and features
 #
-CONFIG_ZONE_DMA=y
 CONFIG_SMP=y
 CONFIG_X86_FEATURE_NAMES=y
 CONFIG_X86_X2APIC=y
@@ -409,7 +409,6 @@ CONFIG_ILLEGAL_POINTER_VALUE=0xdead000000000000
 # CONFIG_X86_PMEM_LEGACY is not set
 CONFIG_X86_CHECK_BIOS_CORRUPTION=y
 CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK=y
-CONFIG_X86_RESERVE_LOW=64
 CONFIG_MTRR=y
 CONFIG_MTRR_SANITIZER=y
 CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=0
@@ -529,6 +528,7 @@ CONFIG_HAVE_ACPI_APEI_NMI=y
 # CONFIG_PMIC_OPREGION is not set
 CONFIG_ACPI_VIOT=y
 CONFIG_X86_PM_TIMER=y
+# CONFIG_ACPI_PRMT is not set

 #
 # CPU Frequency scaling
@@ -647,6 +647,7 @@ CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT=y
 CONFIG_HAVE_KVM_IRQ_BYPASS=y
 CONFIG_HAVE_KVM_NO_POLL=y
 CONFIG_KVM_XFER_TO_GUEST_WORK=y
+CONFIG_HAVE_KVM_PM_NOTIFIER=y
 CONFIG_VIRTUALIZATION=y
 CONFIG_KVM=y
 # CONFIG_KVM_WERROR is not set
@@ -686,6 +687,7 @@ CONFIG_ARCH_HAS_SET_MEMORY=y
 CONFIG_ARCH_HAS_SET_DIRECT_MAP=y
 CONFIG_HAVE_ARCH_THREAD_STRUCT_WHITELIST=y
 CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT=y
+CONFIG_ARCH_WANTS_NO_INSTR=y
 CONFIG_HAVE_ASM_MODVERSIONS=y
 CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
 CONFIG_HAVE_RSEQ=y
@@ -778,14 +780,16 @@ CONFIG_BLK_CGROUP_RWSTAT=y
 CONFIG_BLK_DEV_BSG=y
 CONFIG_BLK_DEV_BSGLIB=y
 CONFIG_BLK_DEV_INTEGRITY=y
+CONFIG_BLK_DEV_INTEGRITY_T10=y
 # CONFIG_BLK_DEV_ZONED is not set
 CONFIG_BLK_DEV_THROTTLING=y
 # CONFIG_BLK_DEV_THROTTLING_LOW is not set
 CONFIG_BLK_CMDLINE_PARSER=y
 CONFIG_BLK_WBT=y
+CONFIG_BLK_WBT_MQ=y
 # CONFIG_BLK_CGROUP_IOLATENCY is not set
 # CONFIG_BLK_CGROUP_IOCOST is not set
-CONFIG_BLK_WBT_MQ=y
+# CONFIG_BLK_CGROUP_IOPRIO is not set
 CONFIG_BLK_DEBUG_FS=y
 # CONFIG_BLK_SED_OPAL is not set
 # CONFIG_BLK_INLINE_ENCRYPTION is not set
@@ -859,7 +863,6 @@ CONFIG_COREDUMP=y
 CONFIG_SELECT_MEMORY_MODEL=y
 CONFIG_SPARSEMEM_MANUAL=y
 CONFIG_SPARSEMEM=y
-CONFIG_NEED_MULTIPLE_NODES=y
 CONFIG_SPARSEMEM_EXTREME=y
 CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
 CONFIG_SPARSEMEM_VMEMMAP=y
@@ -920,6 +923,9 @@ CONFIG_GENERIC_EARLY_IOREMAP=y
 # CONFIG_IDLE_PAGE_TRACKING is not set
 CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
 CONFIG_ARCH_HAS_PTE_DEVMAP=y
+CONFIG_ARCH_HAS_ZONE_DMA_SET=y
+CONFIG_ZONE_DMA=y
+CONFIG_ZONE_DMA32=y
 CONFIG_ZONE_DEVICE=y
 CONFIG_DEV_PAGEMAP_OPS=y
 # CONFIG_DEVICE_PRIVATE is not set
@@ -927,6 +933,7 @@ CONFIG_PERCPU_STATS=y
 # CONFIG_GUP_TEST is not set
 # CONFIG_READ_ONLY_THP_FOR_FS is not set
 CONFIG_ARCH_HAS_PTE_SPECIAL=y
+CONFIG_SECRETMEM=y
 # end of Memory Management options

 CONFIG_NET=y
@@ -1218,7 +1225,9 @@ CONFIG_VIRTIO_BLK=y
 #
 # NVME Support
 #
-# CONFIG_BLK_DEV_NVME is not set
+CONFIG_NVME_CORE=y
+CONFIG_BLK_DEV_NVME=y
+CONFIG_NVME_MULTIPATH=y
 # CONFIG_NVME_FC is not set
 # CONFIG_NVME_TCP is not set
 # CONFIG_NVME_TARGET is not set
@@ -1250,6 +1259,7 @@ CONFIG_VIRTIO_BLK=y
 #
 # Texas Instruments shared transport line discipline
 #
+# CONFIG_TI_ST is not set
 # end of Texas Instruments shared transport line discipline

 #
@@ -1269,9 +1279,6 @@ CONFIG_VIRTIO_BLK=y
 # CONFIG_PVPANIC is not set
 # end of Misc devices

-CONFIG_HAVE_IDE=y
-# CONFIG_IDE is not set
-
 #
 # SCSI device support
 #
@@ -1281,7 +1288,38 @@ CONFIG_SCSI_MOD=y
 # end of SCSI device support

 # CONFIG_ATA is not set
-# CONFIG_MD is not set
+CONFIG_MD=y
+# CONFIG_BLK_DEV_MD is not set
+# CONFIG_BCACHE is not set
+CONFIG_BLK_DEV_DM_BUILTIN=y
+CONFIG_BLK_DEV_DM=y
+# CONFIG_DM_DEBUG is not set
+# CONFIG_DM_UNSTRIPED is not set
+# CONFIG_DM_CRYPT is not set
+# CONFIG_DM_SNAPSHOT is not set
+# CONFIG_DM_THIN_PROVISIONING is not set
+# CONFIG_DM_CACHE is not set
+# CONFIG_DM_WRITECACHE is not set
+# CONFIG_DM_EBS is not set
+# CONFIG_DM_ERA is not set
+# CONFIG_DM_CLONE is not set
+# CONFIG_DM_MIRROR is not set
+# CONFIG_DM_RAID is not set
+# CONFIG_DM_ZERO is not set
+CONFIG_DM_MULTIPATH=y
+# CONFIG_DM_MULTIPATH_QL is not set
+# CONFIG_DM_MULTIPATH_ST is not set
+# CONFIG_DM_MULTIPATH_HST is not set
+# CONFIG_DM_MULTIPATH_IOA is not set
+# CONFIG_DM_DELAY is not set
+# CONFIG_DM_DUST is not set
+# CONFIG_DM_INIT is not set
+# CONFIG_DM_UEVENT is not set
+# CONFIG_DM_FLAKEY is not set
+# CONFIG_DM_VERITY is not set
+# CONFIG_DM_SWITCH is not set
+# CONFIG_DM_LOG_WRITES is not set
+# CONFIG_DM_INTEGRITY is not set
 # CONFIG_TARGET_CORE is not set
 # CONFIG_FUSION is not set

@@ -1334,7 +1372,13 @@ CONFIG_VIRTIO_NET=y
 #
 # CONFIG_WLAN is not set
 # CONFIG_WAN is not set
+
+#
+# Wireless WAN
+#
 # CONFIG_WWAN is not set
+# end of Wireless WAN
+
 # CONFIG_VMXNET3 is not set
 # CONFIG_FUJITSU_ES is not set
 # CONFIG_HYPERV_NET is not set
@@ -1368,6 +1412,9 @@ CONFIG_INPUT_EVDEV=y
 CONFIG_INPUT_KEYBOARD=y
 # CONFIG_KEYBOARD_ATKBD is not set
 # CONFIG_KEYBOARD_LKKBD is not set
+# CONFIG_KEYBOARD_GPIO is not set
+# CONFIG_KEYBOARD_GPIO_POLLED is not set
+# CONFIG_KEYBOARD_MATRIX is not set
 # CONFIG_KEYBOARD_NEWTON is not set
 # CONFIG_KEYBOARD_OPENCORES is not set
 # CONFIG_KEYBOARD_SAMSUNG is not set
@@ -1382,8 +1429,12 @@ CONFIG_INPUT_MISC=y
 # CONFIG_INPUT_AD714X is not set
 # CONFIG_INPUT_E3X0_BUTTON is not set
 # CONFIG_INPUT_PCSPKR is not set
+# CONFIG_INPUT_GPIO_BEEPER is not set
+# CONFIG_INPUT_GPIO_DECODER is not set
+# CONFIG_INPUT_GPIO_VIBRA is not set
 # CONFIG_INPUT_ATLAS_BTNS is not set
 CONFIG_INPUT_UINPUT=y
+# CONFIG_INPUT_GPIO_ROTARY_ENCODER is not set
 # CONFIG_INPUT_ADXL34X is not set
 # CONFIG_INPUT_CMA3000 is not set
 # CONFIG_RMI4_CORE is not set
@@ -1454,6 +1505,7 @@ CONFIG_SERIAL_ARC_NR_PORTS=1
 # CONFIG_SERIAL_SPRD is not set
 # end of Serial drivers

+CONFIG_SERIAL_MCTRL_GPIO=y
 # CONFIG_SERIAL_NONSTANDARD is not set
 # CONFIG_N_GSM is not set
 # CONFIG_NOZOMI is not set
@@ -1476,8 +1528,6 @@ CONFIG_HW_RANDOM_VIRTIO=y
 # CONFIG_MWAVE is not set
 CONFIG_DEVMEM=y
 CONFIG_NVRAM=y
-CONFIG_RAW_DRIVER=y
-CONFIG_MAX_RAW_DEVS=256
 CONFIG_DEVPORT=y
 # CONFIG_HPET is not set
 CONFIG_HANGCHECK_TIMER=y
@@ -1527,7 +1577,60 @@ CONFIG_PTP_1588_CLOCK_KVM=y
 # end of PTP clock support

 # CONFIG_PINCTRL is not set
-# CONFIG_GPIOLIB is not set
+CONFIG_GPIOLIB=y
+CONFIG_GPIOLIB_FASTPATH_LIMIT=512
+CONFIG_GPIO_ACPI=y
+CONFIG_GPIOLIB_IRQCHIP=y
+# CONFIG_DEBUG_GPIO is not set
+CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_CDEV=y
+CONFIG_GPIO_CDEV_V1=y
+
+#
+# Memory mapped GPIO drivers
+#
+# CONFIG_GPIO_AMDPT is not set
+# CONFIG_GPIO_DWAPB is not set
+# CONFIG_GPIO_EXAR is not set
+# CONFIG_GPIO_GENERIC_PLATFORM is not set
+# CONFIG_GPIO_MB86S7X is not set
+# CONFIG_GPIO_VX855 is not set
+# CONFIG_GPIO_AMD_FCH is not set
+# end of Memory mapped GPIO drivers
+
+#
+# Port-mapped I/O GPIO drivers
+#
+# CONFIG_GPIO_F7188X is not set
+# CONFIG_GPIO_IT87 is not set
+# CONFIG_GPIO_SCH311X is not set
+# CONFIG_GPIO_WINBOND is not set
+# CONFIG_GPIO_WS16C48 is not set
+# end of Port-mapped I/O GPIO drivers
+
+#
+# MFD GPIO expanders
+#
+# end of MFD GPIO expanders
+
+#
+# PCI GPIO expanders
+#
+# CONFIG_GPIO_AMD8111 is not set
+# CONFIG_GPIO_BT8XX is not set
+# CONFIG_GPIO_ML_IOH is not set
+CONFIG_GPIO_PCI_IDIO_16=y
+# CONFIG_GPIO_PCIE_IDIO_24 is not set
+# CONFIG_GPIO_RDC321X is not set
+# end of PCI GPIO expanders
+
+#
+# Virtual GPIO drivers
+#
+# CONFIG_GPIO_AGGREGATOR is not set
+# CONFIG_GPIO_MOCKUP is not set
+# end of Virtual GPIO drivers
+
 # CONFIG_W1 is not set
 # CONFIG_POWER_RESET is not set
 # CONFIG_POWER_SUPPLY is not set
@@ -1570,6 +1673,7 @@ CONFIG_WATCHDOG_CORE=y
 CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED=y
 CONFIG_WATCHDOG_OPEN_TIMEOUT=0
 # CONFIG_WATCHDOG_SYSFS is not set
+# CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT is not set

 #
 # Watchdog Pretimeout Governors
@@ -1619,6 +1723,7 @@ CONFIG_WATCHDOG_OPEN_TIMEOUT=0
 # CONFIG_SBC_EPX_C3_WATCHDOG is not set
 # CONFIG_NI903X_WDT is not set
 # CONFIG_NIC7018_WDT is not set
+# CONFIG_MEN_A21_WDT is not set
 CONFIG_VIRTIO_WDT=y

 #
@@ -1736,9 +1841,11 @@ CONFIG_FB=y
 CONFIG_LCD_CLASS_DEVICE=y
 # CONFIG_LCD_PLATFORM is not set
 CONFIG_BACKLIGHT_CLASS_DEVICE=y
+# CONFIG_BACKLIGHT_KTD253 is not set
 # CONFIG_BACKLIGHT_APPLE is not set
 # CONFIG_BACKLIGHT_QCOM_WLED is not set
 # CONFIG_BACKLIGHT_SAHARA is not set
+# CONFIG_BACKLIGHT_GPIO is not set
 # end of Backlight & LCD device support

 #
@@ -1878,7 +1985,6 @@ CONFIG_DMA_ACPI=y
 # CONFIG_INTEL_IDXD is not set
 # CONFIG_INTEL_IOATDMA is not set
 # CONFIG_PLX_DMA is not set
-# CONFIG_XILINX_ZYNQMP_DPDMA is not set
 # CONFIG_QCOM_HIDMA_MGMT is not set
 # CONFIG_QCOM_HIDMA is not set
 CONFIG_DW_DMAC_CORE=y
@@ -1962,9 +2068,16 @@ CONFIG_PMC_ATOM=y
 # CONFIG_MELLANOX_PLATFORM is not set
 # CONFIG_SURFACE_PLATFORMS is not set
 CONFIG_HAVE_CLK=y
-CONFIG_CLKDEV_LOOKUP=y
 CONFIG_HAVE_CLK_PREPARE=y
 CONFIG_COMMON_CLK=y
+
+#
+# Clock driver for ARM Reference designs
+#
+# CONFIG_ICST is not set
+# CONFIG_CLK_SP810 is not set
+# end of Clock driver for ARM Reference designs
+
 # CONFIG_XILINX_VCU is not set
 # CONFIG_HWSPINLOCK is not set

@@ -2074,6 +2187,7 @@ CONFIG_VIRTIO_IOMMU=y
 # PHY Subsystem
 #
 # CONFIG_GENERIC_PHY is not set
+# CONFIG_PHY_CAN_TRANSCEIVER is not set
 # CONFIG_BCM_KONA_USB2_PHY is not set
 # CONFIG_PHY_PXA_28NM_HSIC is not set
 # CONFIG_PHY_PXA_28NM_USB2 is not set
@@ -2232,6 +2346,8 @@ CONFIG_TMPFS_XATTR=y
 # CONFIG_TMPFS_INODE64 is not set
 CONFIG_HUGETLBFS=y
 CONFIG_HUGETLB_PAGE=y
+CONFIG_HUGETLB_PAGE_FREE_VMEMMAP=y
+# CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON is not set
 CONFIG_MEMFD_CREATE=y
 CONFIG_ARCH_HAS_GIGANTIC_PAGE=y
 CONFIG_CONFIGFS_FS=y
@@ -2621,7 +2737,6 @@ CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE=y
 CONFIG_ARCH_HAS_COPY_MC=y
 CONFIG_ARCH_STACKWALK=y
 CONFIG_SBITMAP=y
-# CONFIG_STRING_SELFTEST is not set
 # end of Library routines

 #
@@ -2633,6 +2748,7 @@ CONFIG_SBITMAP=y
 #
 CONFIG_PRINTK_TIME=y
 # CONFIG_PRINTK_CALLER is not set
+# CONFIG_STACKTRACE_BUILD_ID is not set
 CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
 CONFIG_CONSOLE_LOGLEVEL_QUIET=4
 CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
@@ -2653,7 +2769,7 @@ CONFIG_STRIP_ASM_SYMS=y
 # CONFIG_HEADERS_INSTALL is not set
 CONFIG_DEBUG_SECTION_MISMATCH=y
 CONFIG_SECTION_MISMATCH_WARN_ONLY=y
-# CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B is not set
+# CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B is not set
 CONFIG_FRAME_POINTER=y
 CONFIG_STACK_VALIDATION=y
 # CONFIG_VMLINUX_MAP is not set
@@ -2854,7 +2970,6 @@ CONFIG_CC_HAS_SANCOV_TRACE_PC=y
 # CONFIG_KCOV is not set
 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_TEST_DIV64 is not set
@@ -2864,10 +2979,12 @@ CONFIG_RUNTIME_TESTING_MENU=y
 # CONFIG_INTERVAL_TREE_TEST is not set
 # CONFIG_ATOMIC64_SELFTEST is not set
 # CONFIG_TEST_HEXDUMP is not set
+# CONFIG_STRING_SELFTEST is not set
 # CONFIG_TEST_STRING_HELPERS is not set
 # CONFIG_TEST_STRSCPY is not set
 # CONFIG_TEST_KSTRTOX is not set
 # CONFIG_TEST_PRINTF is not set
+# CONFIG_TEST_SCANF is not set
 # CONFIG_TEST_BITMAP is not set
 # CONFIG_TEST_UUID is not set
 # CONFIG_TEST_XARRAY is not set
@@ -2884,6 +3001,7 @@ CONFIG_RUNTIME_TESTING_MENU=y
 # CONFIG_TEST_MEMINIT is not set
 # CONFIG_TEST_FREE_PAGES is not set
 # CONFIG_TEST_FPU is not set
+# CONFIG_TEST_CLOCKSOURCE_WATCHDOG is not set
 CONFIG_ARCH_USE_MEMTEST=y
 # CONFIG_MEMTEST is not set
 # CONFIG_HYPERV_TESTING is not set
--- a/rpm/cloud-hypervisor.spec
+++ b/rpm/cloud-hypervisor.spec
@@ -1,6 +1,15 @@
+# This spec file assumes you're building on an environment where:
+# * You have access to the internet during the build
+# * You have rustup installed on your system
+# * You have both x86_64-unknown-linux-gnu and  x86_64-unknown-linux-musl
+#   targets installed.
+
+%define using_rustup 1
+%define using_musl_libc 1
+
 Name:           cloud-hypervisor
 Summary:        Cloud Hypervisor is an open source Virtual Machine Monitor (VMM) that runs on top of KVM.
-Version:        15.0
+Version:        20.0
 Release:        0%{?dist}
 License:        ASL 2.0 or BSD-3-clause
 Group:          Applications/System
@@ -12,7 +21,7 @@ BuildRequires:  glibc-devel
 BuildRequires:  binutils
 BuildRequires:  git

-%if 0%{?fedora} || 0%{?rhel}
+%if ! 0%{?using_rustup}
 BuildRequires:  rust
 BuildRequires:  cargo
 %endif
@@ -39,11 +48,13 @@ install -d %{buildroot}%{_libdir}/cloud-hypervisor
 install -D -m755 target/x86_64-unknown-linux-gnu/release/vhost_user_block %{buildroot}%{_libdir}/cloud-hypervisor
 install -D -m755 target/x86_64-unknown-linux-gnu/release/vhost_user_net %{buildroot}%{_libdir}/cloud-hypervisor

+%if 0%{?using_musl_libc}
 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_block %{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
+%endif


 %build
@@ -52,22 +63,33 @@ if [[ $? -ne 0 ]]; then
 	echo "Cargo not found, please install cargo. exiting"
 	exit 0
 fi
+
+%if 0%{?using_rustup}
 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
+%endif
+
 echo ${cargo_version}
+
+%if 0%{?using_rustup}
 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
+	%if 0%{?using_musl_libc}
 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
+	%endif
+%endif

 cargo build --release --target=x86_64-unknown-linux-gnu --all
+%if 0%{?using_musl_libc}
 cargo build --release --target=x86_64-unknown-linux-musl --all
+%endif


 %clean
@@ -75,19 +97,27 @@ rm -rf %{buildroot}

 %files
 %defattr(-,root,root,-)
-%{_bindir}/*
-%{_libdir}/cloud-hypervisor
+%{_bindir}/ch-remote
+%caps(cap_net_admin=ep) %{_bindir}/cloud-hypervisor
+%{_libdir}/cloud-hypervisor/vhost_user_block
+%caps(cap_net_admin=ep) %{_libdir}/cloud-hypervisor/vhost_user_net
+%if 0%{?using_musl_libc}
+%{_libdir}/cloud-hypervisor/static/ch-remote
+%caps(cap_net_admim=ep) %{_libdir}/cloud-hypervisor/static/cloud-hypervisor
+%{_libdir}/cloud-hypervisor/static/vhost_user_block
+%caps(cap_net_admin=ep) %{_libdir}/cloud-hypervisor/static/vhost_user_net
+%endif
 %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
-

 %changelog
+*   Thu Dec 02 2021 Sebastien Boeuf <sebastien.boeuf@intel.com> 20.0-0
+-   Update to 20.0
+
+*   Mon Nov 08 2021 Fabiano Fidêncio <fabiano.fidencio@intel.com> 19.0-0
+-   Update to 19.0
+
 *   Fri May 28 2021 Muminul Islam <muislam@microsoft.com> 15.0-0
 -   Update version to 15.0

--- a/scripts/check-image-compatability.sh
+++ b/scripts/check-image-compatability.sh
@@ -0,0 +1,215 @@
+#!/bin/bash
+: '
+    This script checks if an image is compatible with Cloud Hypervisor.
+    At first, it detects the image type(raw or qcow2),
+    partition type whether it is DOS or GPT.
+    Then it mounts the image and checks if VIRTIO Configs
+    are enabled in the kernel config. In the end, it provides
+    a message about the compatibility of the image.
+'
+
+
+
+usage="$(basename "$0") [-h] -f -w -- program to check Cloud Hypervisor compatible image
+
+where:
+    -h  show this help text
+    -f  image file location
+    -w  directory to be used for temporary files"
+
+function check_command {
+    if ! command -v  $1 &> /dev/null
+        then
+            echo "Command $1 could not be found"
+        exit 1
+    fi
+};
+
+function check_if_root {
+    if [ "$EUID" -ne 0 ]; then
+        echo "Please run as root"
+        exit 1
+    fi
+
+};
+
+check_if_root
+working_dir=""
+while getopts ':hf:w:' option; do
+    case "$option" in
+        h) echo "$usage"
+            exit
+            ;;
+        f) file_name=$OPTARG
+            ;;
+        w) working_dir=$OPTARG
+            ;;
+        :) printf "missing argument for -%s\n" "$OPTARG" >&2
+            echo "$usage" >&2
+            exit 1
+            ;;
+        \?) printf "illegal option: -%s\n" "$OPTARG" >&2
+            echo "$usage" >&2
+            exit 1
+            ;;
+    esac
+done
+
+shift $((OPTIND - 1))
+
+if [ -z "${file_name}" ]; then
+    echo "You must provide the image file name"
+	exit 1
+fi
+if [[ ! -f ${file_name} ]]; then
+    echo "File ${file_name} does not exist"
+    exit 1
+fi
+
+file_abs_path=`readlink -m ${file_name}`
+if [[ "${working_dir}" != "" && ! -d "${working_dir}" ]]; then
+    echo "Directory ${working_dir} does not exist"
+    exit 1
+elif [[ "${working_dir}" == "" ]]; then
+    working_dir=`mktemp -d`
+    tmp_created=1
+else
+    working_dir=`readlink -m ${working_dir}`
+fi
+
+#get file extension and image type
+extension="${file_name##*.}"
+filename="${file_name%.*}"
+dest_file=${working_dir}/${filename}.raw
+image_type=$(qemu-img info ${file_abs_path} | grep 'file format:' | awk '{ print $3 }')
+echo "Image type detected as ${image_type}"
+
+
+if [[ "${image_type}" == "raw" ]]; then
+	dest_file=${file_abs_path}
+elif [[ "$image_type" == "qcow2" ]]; then
+    if lsmod | grep "nbd" &> /dev/null ; then
+        echo "Module nbd is loaded!"
+    else
+        echo "Module nbd is not loaded. Trying to load the module"
+        modprobe nbd max_part=8
+        if [ $? != 0 ]; then
+            echo "failed to load nbd module. Exiting"
+            exit 1
+        fi
+    fi
+    check_command qemu-img
+    dest_file=/dev/nbd0
+    qemu-nbd --connect=${dest_file} ${file_abs_path} --read-only
+fi
+
+check_command blkid
+#get part info
+part_type=$(blkid -o value -s PTTYPE ${dest_file})
+
+check_command partx
+nr_partitions=`partx -g ${dest_file}  | wc -l`
+
+check_command fdisk
+out=`fdisk -l  ${dest_file} --bytes | grep -i -A ${nr_partitions} 'Device' | tail -n +2`
+
+IFS='
+'
+i=0
+declare -A liness
+for x in $out ; do
+	lines[$i]=$x
+	i=$((i+1))
+done
+
+declare -A partitions
+IFS=' '
+i=0
+ROWS=${#lines[@]}
+
+for line in "${lines[@]}";
+do
+	j=0
+	read -a str_arr <<< "$line"
+	for val in "${str_arr[@]}";
+	do
+		if [[ "$val" != "*" ]]; then
+			partitions[$i,$j]=$val
+			j=$((j+1))
+		fi
+	done
+	i=$((i+1))
+done
+
+COLUMNS=$j
+COUNT=${#partitions[@]}
+START_ADDRESS_INDEX=1
+FILE_SYS_INDEX2=$((COLUMNS-1))
+FILE_SYS_INDEX1=$((COLUMNS-2))
+DEVICE_INDEX=0
+# Here we have all the partition info now lets mount and analyze the contents
+for ((i=0;i<ROWS;i++)) do
+	if [[ "$part_type" == "gpt" && "${partitions[$i,${FILE_SYS_INDEX1}]}" == "Linux" && "${partitions[$i,${FILE_SYS_INDEX2}]}" == "filesystem" ]]; then
+        echo "The image has GPT partitions"
+        MOUNT_ROW=$i
+		break
+	elif [[ "$part_type" == "dos" && "${partitions[$i,${FILE_SYS_INDEX1}]}" == "Linux" && "${partitions[$i,${FILE_SYS_INDEX2}]}" == "" ]]; then
+        echo "The image has DOS partitions"
+        MOUNT_ROW=$i
+        break
+	fi
+done
+
+start_address=${partitions[${MOUNT_ROW},${START_ADDRESS_INDEX}]}
+offset=$((start_address*512))
+
+MOUNT_DIR=/mnt/clh-img-check/
+rm -rf ${MOUNT_DIR}
+mkdir ${MOUNT_DIR}
+if [[ "${image_type}" == "raw" ]]; then
+    mount -o ro,loop,offset=$offset ${dest_file} ${MOUNT_DIR}
+elif [[ "${image_type}" == "qcow2" ]]; then
+    mount -o ro ${partitions[${MOUNT_ROW},${DEVICE_INDEX}]} ${MOUNT_DIR}
+fi
+
+CONFIG_DIR=${MOUNT_DIR}boot/
+if [[ "$part_type" == "dos" ]]; then
+	CONFIG_DIR=${MOUNT_DIR}
+fi
+
+#check VIRTIO
+HAS_VIRTIO=1
+for conf_file in ${CONFIG_DIR}config*; do
+    out=`grep -E "CONFIG_VIRTIO=y|CONFIG_VIRTIO_BLK=y|CONFIG_VIRTIO_BLK=m" ${conf_file} | wc -l`
+    if [[ "$out" != "2" ]]; then
+	    echo "VIRTIO not found"
+		HAS_VIRTIO=0
+	fi
+done
+
+#clean up
+umount ${MOUNT_DIR}
+
+if [[ "${tmp_created}" == "1" ]]; then
+    rm -rf ${working_dir}
+fi
+
+if [[ "${image_type}" == "qcow2" ]];then
+    qemu-nbd --disconnect ${dest_file} > /dev/null
+fi
+
+result=""
+if [[ "${part_type}" == "dos" ]]; then
+	result="dos mode not supported"
+fi
+if [[ "${HAS_VIRTIO}" == "0" ]]; then
+	if [[ "$result" != "" ]]; then
+		result="${result},"
+	fi
+	result="$result VirtIO module not found in the image"
+fi
+if [[ "$result" == "" ]];then
+	echo "No incompatibilities found"
+else
+	echo "$result"
+fi
--- a/scripts/dev_cli.sh
+++ b/scripts/dev_cli.sh
@@ -178,16 +178,17 @@ cmd_help() {
    echo ""
    echo "    tests [--unit|--cargo|--all] [--libc musl|gnu] [-- [<cargo test args>]]"
    echo "        Run the Cloud Hypervisor tests."
-    echo "        --unit                Run the unit tests."
-    echo "        --cargo               Run the cargo tests."
-    echo "        --integration         Run the integration tests."
-    echo "        --integration-sgx     Run the SGX integration tests."
-    echo "        --integration-vfio    Run the VFIO integration tests."
-    echo "        --integration-windows Run the Windows guest integration tests."
-    echo "        --libc                Select the C library Cloud Hypervisor will be built against. Default is gnu"
-    echo "        --volumes             Hash separated volumes to be exported. Example --volumes /mnt:/mnt#/myvol:/myvol"
-    echo "        --hypervisor          Underlying hypervisor. Options kvm, mshv"
-    echo "        --all                 Run all tests."
+    echo "        --unit                       Run the unit tests."
+    echo "        --cargo                      Run the cargo tests."
+    echo "        --integration                Run the integration tests."
+    echo "        --integration-sgx            Run the SGX integration tests."
+    echo "        --integration-vfio           Run the VFIO integration tests."
+    echo "        --integration-windows        Run the Windows guest integration tests."
+    echo "        --integration-live-migration Run the live-migration integration tests."
+    echo "        --libc                       Select the C library Cloud Hypervisor will be built against. Default is gnu"
+    echo "        --volumes                    Hash separated volumes to be exported. Example --volumes /mnt:/mnt#/myvol:/myvol"
+    echo "        --hypervisor                 Underlying hypervisor. Options kvm, mshv"
+    echo "        --all                        Run all tests."
    echo ""
    echo "    build-container [--type]"
    echo "        Build the Cloud Hypervisor container."
@@ -239,13 +240,11 @@ cmd_build() {
    done

    ensure_build_dir
-    if [ $(uname -m) = "x86_64" ]; then
-	ensure_latest_ctr
-    fi
+    ensure_latest_ctr

    process_volumes_args
-    if [[ "$hypervisor" != "kvm" ]]; then
-        die "Hypervisor value must be kvm"
+    if [[ ! ("$hypervisor" = "kvm" ||  "$hypervisor" = "mshv") ]]; then
+        die "Hypervisor value must be kvm or mshv"
    fi
    if [[ "$hypervisor" = "mshv" ]]; then
        exported_device="/dev/mshv"
@@ -280,9 +279,7 @@ cmd_clean() {
    cargo_args=("$@")

    ensure_build_dir
-    if [ $(uname -m) = "x86_64" ]; then
-	ensure_latest_ctr
-    fi
+    ensure_latest_ctr

    $DOCKER_RUNTIME run \
 	   --user "$(id -u):$(id -g)" \
@@ -302,19 +299,21 @@ cmd_tests() {
    integration_sgx=false
    integration_vfio=false
    integration_windows=false
+    integration_live_migration=false
    libc="gnu"
    arg_vols=""
    hypervisor="kvm"
    exported_device="/dev/kvm"
    while [ $# -gt 0 ]; do
 	case "$1" in
-            "-h"|"--help")           { cmd_help; exit 1; } ;;
-            "--unit")                { unit=true; } ;;
-            "--cargo")               { cargo=true; } ;;
-            "--integration")         { integration=true; } ;;
-            "--integration-sgx")     { integration_sgx=true; } ;;
-            "--integration-vfio")    { integration_vfio=true; } ;;
-            "--integration-windows") { integration_windows=true; } ;;
+            "-h"|"--help")                  { cmd_help; exit 1; } ;;
+            "--unit")                       { unit=true; } ;;
+            "--cargo")                      { cargo=true; } ;;
+            "--integration")                { integration=true; } ;;
+            "--integration-sgx")            { integration_sgx=true; } ;;
+            "--integration-vfio")           { integration_vfio=true; } ;;
+            "--integration-windows")        { integration_windows=true; } ;;
+            "--integration-live-migration") { integration_live_migration=true; } ;;
            "--libc")
                shift
                [[ "$1" =~ ^(musl|gnu)$ ]] || \
@@ -337,18 +336,18 @@ cmd_tests() {
 	esac
 	shift
    done
-    if [[ "$hypervisor" != "kvm" ]]; then
-        die "Hypervisor value must be kvm"
+    if [[ ! ("$hypervisor" = "kvm" ||  "$hypervisor" = "mshv") ]]; then
+        die "Hypervisor value must be kvm or mshv"
    fi
+
    if [[ "$hypervisor" = "mshv" ]]; then
        exported_device="/dev/mshv"
    fi
+
    set -- "$@" '--hypervisor' $hypervisor

    ensure_build_dir
-    if [ $(uname -m) = "x86_64" ]; then
-	ensure_latest_ctr
-    fi
+    ensure_latest_ctr

    process_volumes_args
    target="$(uname -m)-unknown-linux-${libc}"
@@ -460,6 +459,25 @@ cmd_tests() {
 	       "$CTR_IMAGE" \
 	       ./scripts/run_integration_tests_windows.sh "$@" || fix_dir_perms $? || exit $?
    fi
+
+    if [ "$integration_live_migration" = true ] ;  then
+	say "Running 'live migration' integration tests for $target..."
+	$DOCKER_RUNTIME run \
+	       --workdir "$CTR_CLH_ROOT_DIR" \
+	       --rm \
+	       --privileged \
+	       --security-opt seccomp=unconfined \
+	       --ipc=host \
+	       --net="$CTR_CLH_NET" \
+	       --mount type=tmpfs,destination=/tmp \
+	       --volume /dev:/dev \
+	       --volume "$CLH_ROOT_DIR:$CTR_CLH_ROOT_DIR"  $exported_volumes \
+	       --volume "$CLH_INTEGRATION_WORKLOADS:$CTR_CLH_INTEGRATION_WORKLOADS" \
+	       --env USER="root" \
+	       --env CH_LIBC="${libc}" \
+	       "$CTR_IMAGE" \
+	       ./scripts/run_integration_tests_live_migration.sh "$@" || fix_dir_perms $? || exit $?
+    fi
    fix_dir_perms $?
 }

@@ -479,9 +497,7 @@ cmd_build-container() {
    done

    ensure_build_dir
-    if [ $(uname -m) = "x86_64" ]; then
-	ensure_latest_ctr
-    fi
+    ensure_latest_ctr

    BUILD_DIR=/tmp/cloud-hypervisor/container/

@@ -514,9 +530,7 @@ cmd_shell() {
 	shift
    done
    ensure_build_dir
-    if [ $(uname -m) = "x86_64" ]; then
-	ensure_latest_ctr
-    fi
+    ensure_latest_ctr
    process_volumes_args
    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 $CTR_CLH_ROOT_DIR"
--- a/scripts/run_integration_tests_aarch64.sh
+++ b/scripts/run_integration_tests_aarch64.sh
@@ -8,70 +8,97 @@ export BUILD_TARGET=${BUILD_TARGET-aarch64-unknown-linux-gnu}

 WORKLOADS_DIR="$HOME/workloads"
 WORKLOADS_LOCK="$WORKLOADS_DIR/integration_test.lock"
-EDK2_BUILD_DIR="$WORKLOADS_DIR/edk2_build"

 mkdir -p "$WORKLOADS_DIR"

-build_edk2() {
-    EDK2_REPO="https://github.com/tianocore/edk2.git"
-    EDK2_DIR="edk2"
-    EDK2_BRANCH="master"
-    EDK2_PLAT_REPO="https://github.com/tianocore/edk2-platforms.git"
-    EDK2_PLAT_DIR="edk2-platforms"
-    ACPICA_REPO="https://github.com/acpica/acpica.git"
-    ACPICA_DIR="acpica"
+# Checkout source code of a GIT repo with specified branch and commit
+# Args:
+#   $1: Target directory
+#   $2: GIT URL of the repo
+#   $3: Required branch
+#   $4: Required commit (optional)
+checkout_repo() {
+    SRC_DIR="$1"
+    GIT_URL="$2"
+    GIT_BRANCH="$3"
+    GIT_COMMIT="$4"

-    export WORKSPACE="$EDK2_BUILD_DIR"
-    export PACKAGES_PATH="$WORKSPACE/$EDK2_DIR:$WORKSPACE/$EDK2_PLAT_DIR"
-    export IASL_PREFIX="$WORKSPACE/acpica/generate/unix/bin/"
-
-    cd "$WORKLOADS_DIR"
-    if [ ! -d "$WORKSPACE" ]; then
-        mkdir -p "$WORKSPACE"
-    fi
-
-    pushd "$WORKSPACE"
-
-    # Check whether the local HEAD commit same as the remote HEAD or not. Remove the folder if they are different.
-    if [ -d "$EDK2_DIR" ]; then
-        pushd $EDK2_DIR
+    # Check whether the local HEAD commit same as the requested commit or not.
+    # If commit is not specified, compare local HEAD and remote HEAD.
+    # Remove the folder if there is difference.
+    if [ -d "$SRC_DIR" ]; then
+        pushd $SRC_DIR
        git fetch
-        EDK2_LOCAL_HEAD=$(git rev-parse HEAD)
-        EDK2_REMOTE_HEAD=$(git rev-parse remotes/origin/$EDK2_BRANCH)
+        SRC_LOCAL_COMMIT=$(git rev-parse HEAD)
+        if [ -z "$GIT_COMMIT" ]; then
+            GIT_COMMIT=$(git rev-parse remotes/origin/"$GIT_BRANCH")
+        fi
        popd
-        if [ "$EDK2_LOCAL_HEAD" != "$EDK2_REMOTE_HEAD" ]; then
-            # If EDK2 code is out of date, remove and rebuild all
-            rm -rf "$EDK2_DIR"
-            rm -rf "$EDK2_PLAT_DIR"
-            rm -rf "$ACPICA_DIR"
+        if [ "$SRC_LOCAL_COMMIT" != "$GIT_COMMIT" ]; then
+            rm -rf "$SRC_DIR"
        fi
    fi

-    if [ ! -d "$EDK2_DIR" ]; then
-        time git clone --depth 1 "$EDK2_REPO" -b "$EDK2_BRANCH" "$EDK2_DIR"
-        pushd $EDK2_DIR
-        git submodule update --init
-        popd
+    # Checkout the specified branch and commit (if required)
+    if [ ! -d "$SRC_DIR" ]; then
+        git clone --depth 1 "$GIT_URL" -b "$GIT_BRANCH" "$SRC_DIR"
+        if [ "$GIT_COMMIT" ]; then
+            pushd "$SRC_DIR"
+            git fetch --depth 1 origin "$GIT_COMMIT"
+            git reset --hard FETCH_HEAD
+            popd
+        fi
+    fi
+}
+
+build_custom_linux() {
+    SRCDIR=$PWD
+    LINUX_CUSTOM_DIR="$WORKLOADS_DIR/linux-custom"
+    LINUX_CUSTOM_BRANCH="ch-5.14"
+    LINUX_CUSTOM_URL="https://github.com/cloud-hypervisor/linux.git"
+
+    checkout_repo "$LINUX_CUSTOM_DIR" "$LINUX_CUSTOM_URL" "$LINUX_CUSTOM_BRANCH"
+
+    cp $SRCDIR/resources/linux-config-aarch64 $LINUX_CUSTOM_DIR/.config
+
+    pushd $LINUX_CUSTOM_DIR
+    time make -j `nproc`
+    cp arch/arm64/boot/Image "$WORKLOADS_DIR/" || exit 1
+    cp arch/arm64/boot/Image.gz "$WORKLOADS_DIR/" || exit 1
+    popd
+}
+
+build_edk2() {
+    EDK2_BUILD_DIR="$WORKLOADS_DIR/edk2_build"
+    EDK2_REPO="https://github.com/tianocore/edk2.git"
+    EDK2_DIR="$EDK2_BUILD_DIR/edk2"
+    EDK2_PLAT_REPO="https://github.com/tianocore/edk2-platforms.git"
+    EDK2_PLAT_DIR="$EDK2_BUILD_DIR/edk2-platforms"
+    ACPICA_REPO="https://github.com/acpica/acpica.git"
+    ACPICA_DIR="$EDK2_BUILD_DIR/acpica"
+    export WORKSPACE="$EDK2_BUILD_DIR"
+    export PACKAGES_PATH="$EDK2_DIR:$EDK2_PLAT_DIR"
+    export IASL_PREFIX="$ACPICA_DIR/generate/unix/bin/"
+
+    if [ ! -d "$EDK2_BUILD_DIR" ]; then
+        mkdir -p "$EDK2_BUILD_DIR"
    fi

-    if [ ! -d "$EDK2_PLAT_DIR" ]; then
-        time git clone --depth 1 "$EDK2_PLAT_REPO" -b master "$EDK2_PLAT_DIR"
-    fi
-
-    if [ ! -d "$ACPICA_DIR" ]; then
-        time git clone --depth 1 "$ACPICA_REPO" -b master "$ACPICA_DIR"
-    fi
-
-    make -C "$ACPICA_DIR"/
+    # Prepare source code
+    checkout_repo "$EDK2_DIR" "$EDK2_REPO" master "46b4606ba23498d3d0e66b53e498eb3d5d592586"
+    pushd "$EDK2_DIR"
+    git submodule update --init
+    popd
+    checkout_repo "$EDK2_PLAT_DIR" "$EDK2_PLAT_REPO" master "8227e9e9f6a8aefbd772b40138f835121ccb2307"
+    checkout_repo "$ACPICA_DIR" "$ACPICA_REPO" master "b9c69f81a05c45611c91ea9cbce8756078d76233"

+    pushd "$EDK2_BUILD_DIR"
+    # Build
+    make -C acpica -j `nproc`
    source edk2/edksetup.sh
-    make -C edk2/BaseTools
-
-    build -a AARCH64 -t GCC5 -p ArmVirtPkg/ArmVirtCloudHv.dsc -b RELEASE
+    make -C edk2/BaseTools -j `nproc`
+    build -a AARCH64 -t GCC5 -p ArmVirtPkg/ArmVirtCloudHv.dsc -b RELEASE -n 0
    cp Build/ArmVirtCloudHv-AARCH64/RELEASE_GCC5/FV/CLOUDHV_EFI.fd "$WORKLOADS_DIR"
-
-    echo "Info: build UEFI successfully"
-
    popd
 }

@@ -105,7 +132,7 @@ update_workloads() {
        popd
    fi

-    FOCAL_OS_RAW_IMAGE_NAME="focal-server-cloudimg-arm64-custom.raw"
+    FOCAL_OS_RAW_IMAGE_NAME="focal-server-cloudimg-arm64-custom-20210929-0.raw"
    FOCAL_OS_RAW_IMAGE_DOWNLOAD_URL="https://cloud-hypervisor.azureedge.net/$FOCAL_OS_RAW_IMAGE_NAME"
    FOCAL_OS_RAW_IMAGE="$WORKLOADS_DIR/$FOCAL_OS_RAW_IMAGE_NAME"
    if [ ! -f "$FOCAL_OS_RAW_IMAGE" ]; then
@@ -114,9 +141,7 @@ update_workloads() {
        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_NAME="focal-server-cloudimg-arm64-custom-20210929-0.qcow2"
    FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_DOWNLOAD_URL="https://cloud-hypervisor.azureedge.net/$FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME"
    FOCAL_OS_QCOW2_UNCOMPRESSED_IMAGE="$WORKLOADS_DIR/$FOCAL_OS_QCOW2_IMAGE_UNCOMPRESSED_NAME"
    if [ ! -f "$FOCAL_OS_QCOW2_UNCOMPRESSED_IMAGE" ]; then
@@ -159,60 +184,27 @@ update_workloads() {
    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 kernel for guest VMs
+    build_custom_linux

-    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
-    LINUX_CUSTOM_BRANCH="ch-5.12"
-
-    # Check whether the local HEAD commit same as the remote HEAD or not. Remove the folder if they are different.
-    if [ -d "$LINUX_CUSTOM_DIR" ]; then
-        pushd $LINUX_CUSTOM_DIR
-        git fetch
-        LINUX_CUSTOM_LOCAL_HEAD=$(git rev-parse HEAD)
-        LINUX_CUSTOM_REMOTE_HEAD=$(git rev-parse remotes/origin/$LINUX_CUSTOM_BRANCH)
-        popd
-        if [ "$LINUX_CUSTOM_LOCAL_HEAD" != "$LINUX_CUSTOM_REMOTE_HEAD" ]; then
-            rm -rf "$LINUX_CUSTOM_DIR"
-        fi
-    fi
-
-    if [ ! -d "$LINUX_CUSTOM_DIR" ]; then
-        time git clone --depth 1 "https://github.com/cloud-hypervisor/linux.git" -b $LINUX_CUSTOM_BRANCH $LINUX_CUSTOM_DIR
-    fi
-
-    cp $SRCDIR/resources/linux-config-aarch64 $LINUX_CUSTOM_DIR/.config
-    build_custom_linux_kernel
-
-    VIRTIOFSD="$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 "qemu5.0-virtiofs-dax" $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 $QEMU_DIR
-        popd
-    fi
+    # Update the kernel in the cloud image for some tests that requires recent kernel version
+    FOCAL_OS_RAW_IMAGE_UPDATE_KERNEL_NAME="focal-server-cloudimg-arm64-custom-20210929-0-update-kernel.raw"
+    cp "$WORKLOADS_DIR/$FOCAL_OS_RAW_IMAGE_NAME" "$WORKLOADS_DIR/$FOCAL_OS_RAW_IMAGE_UPDATE_KERNEL_NAME"
+    FOCAL_OS_RAW_IMAGE_UPDATE_KERNEL_ROOT_DIR="$WORKLOADS_DIR/focal-server-cloudimg-root"
+    mkdir -p "$FOCAL_OS_RAW_IMAGE_UPDATE_KERNEL_ROOT_DIR"
+    # Mount the 'raw' image, replace the compressed kernel file and umount the working folder
+    guestmount -a "$WORKLOADS_DIR/$FOCAL_OS_RAW_IMAGE_UPDATE_KERNEL_NAME" -m /dev/sda1 "$FOCAL_OS_RAW_IMAGE_UPDATE_KERNEL_ROOT_DIR" || exit 1
+    cp "$WORKLOADS_DIR"/Image.gz "$FOCAL_OS_RAW_IMAGE_UPDATE_KERNEL_ROOT_DIR"/boot/vmlinuz
+    guestunmount "$FOCAL_OS_RAW_IMAGE_UPDATE_KERNEL_ROOT_DIR"

+    # Build virtiofsd
    VIRTIOFSD_RS="$WORKLOADS_DIR/virtiofsd-rs"
    VIRTIOFSD_RS_DIR="virtiofsd_rs_build"
    if [ ! -f "$VIRTIOFSD_RS" ]; then
        pushd $WORKLOADS_DIR
-        git clone --depth 1 "https://gitlab.com/virtio-fs/virtiofsd-rs.git" $VIRTIOFSD_RS_DIR
+        git clone "https://gitlab.com/virtio-fs/virtiofsd-rs.git" $VIRTIOFSD_RS_DIR
        pushd $VIRTIOFSD_RS_DIR
+        git checkout 21d20035a582fb0389697b1bd7f8331623a77939
        time cargo build --release
        cp target/release/virtiofsd-rs $VIRTIOFSD_RS || exit 1
        popd
@@ -249,7 +241,7 @@ process_common_args "$@"

 # aarch64 not supported for MSHV
 if [[ "$hypervisor" = "mshv" ]]; then
-    echo "Aarch64 is not supported in Microsoft Hypervisor"
+    echo "AArch64 is not supported in Microsoft Hypervisor"
    exit 1
 fi

@@ -292,14 +284,36 @@ 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"

-# Setup ovs-dpdk
+# Setup huge-pages for ovs-dpdk
 echo 2048 | sudo tee /proc/sys/vm/nr_hugepages
-service openvswitch-switch start
-ovs-vsctl init
-ovs-vsctl set Open_vSwitch . other_config:dpdk-init=true
-service openvswitch-switch restart

+# Run all direct kernel boot (Device Tree) test cases in mod `parallel`
 time cargo test $features_test "tests::parallel::$test_filter"
 RES=$?

+# Run some tests in sequence since the result could be affected by other tests
+# running in parallel.
+if [ $RES -eq 0 ]; then
+    time cargo test $features_test "tests::sequential::$test_filter" -- --test-threads=1
+    RES=$?
+else
+    exit $RES
+fi
+
+# Run all ACPI test cases
+if [ $RES -eq 0 ]; then
+    time cargo test $features_test "tests::aarch64_acpi::$test_filter"
+    RES=$?
+else
+    exit $RES
+fi
+
+# Run all test cases related to live migration
+if [ $RES -eq 0 ]; then
+    time cargo test $features_test "tests::live_migration::$test_filter" -- --test-threads=1
+    RES=$?
+else
+    exit $RES
+fi
+
 exit $RES
--- a/Show More
+++ b/Show More