build: Release v37.1 (bug fix release)

Signed-off-by: Bo Chen <chen.bo@intel.com>

.github/dependabot.yml

@@ -16,8 +16,3 @@ updates:
   allow:
   - dependency-type: direct
   - dependency-type: indirect
-- package-ecosystem: github-actions
-  directory: "/"
-  schedule:
-    interval: daily
-  open-pull-requests-limit: 1

.github/workflows/audit.yaml

@@ -10,7 +10,7 @@ jobs:
     name: Audit
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
-      - uses: actions-rust-lang/audit@v1
+      - uses: actions/checkout@v4
+      - uses: actions-rs/audit-check@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/build.yaml

@@ -15,13 +15,13 @@ jobs:
           - stable
           - beta
           - nightly
-          - "1.88.0"
+          - "1.70"
         target:
           - x86_64-unknown-linux-gnu
           - x86_64-unknown-linux-musl
     steps:
       - name: Code checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -29,46 +29,38 @@ jobs:
         run: sudo apt install -y musl-tools
 
       - name: Install Rust toolchain (${{ matrix.rust }})
-        uses: dtolnay/rust-toolchain@stable
+        uses: actions-rs/toolchain@v1
         with:
           toolchain: ${{ matrix.rust }}
           target: ${{ matrix.target }}
+          override: true
 
       - name: Build (default features)
-        run: cargo rustc --locked --bin cloud-hypervisor -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+        run: cargo rustc --locked --bin cloud-hypervisor -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Build (kvm)
-        run: cargo rustc --locked --bin cloud-hypervisor --no-default-features --features "kvm"  -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+        run: cargo rustc --locked --bin cloud-hypervisor --no-default-features --features "kvm"  -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Build (default features + tdx)
-        run: cargo rustc --locked --bin cloud-hypervisor --features "tdx" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+        run: cargo rustc --locked --bin cloud-hypervisor --features "tdx" -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Build (default features + dbus_api)
-        run: cargo rustc --locked --bin cloud-hypervisor --features "dbus_api" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+        run: cargo rustc --locked --bin cloud-hypervisor --features "dbus_api" -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Build (default features + guest_debug)
-        run: cargo rustc --locked --bin cloud-hypervisor --features "guest_debug" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Build (default features + pvmemcontrol)
-        run: cargo rustc --locked --bin cloud-hypervisor --features "pvmemcontrol" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Build (default features + fw_cfg)
-        run: cargo rustc --locked --bin cloud-hypervisor --features "fw_cfg" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Build (default features + ivshmem)
-        run: cargo rustc --locked --bin cloud-hypervisor --features "ivshmem" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+        run: cargo rustc --locked --bin cloud-hypervisor --features "guest_debug" -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Build (mshv)
-        run: cargo rustc --locked --bin cloud-hypervisor --no-default-features --features "mshv"  -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+        run: cargo rustc --locked --bin cloud-hypervisor --no-default-features --features "mshv"  -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Build (sev_snp)
-        run: cargo rustc --locked --bin cloud-hypervisor --no-default-features --features "sev_snp"  -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+        run: cargo rustc --locked --bin cloud-hypervisor --no-default-features --features "sev_snp"  -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Build (igvm)
-        run: cargo rustc --locked --bin cloud-hypervisor --no-default-features --features "igvm"  -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+        run: cargo rustc --locked --bin cloud-hypervisor --no-default-features --features "igvm"  -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Build (mshv + kvm)
-        run: cargo rustc --locked --bin cloud-hypervisor --no-default-features --features "mshv,kvm"  -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+        run: cargo rustc --locked --bin cloud-hypervisor --no-default-features --features "mshv,kvm"  -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Release Build (default features)
         run: cargo build --locked --all --release --target=${{ matrix.target }}

.github/workflows/dco.yaml

@@ -6,9 +6,9 @@ jobs:
     name: DCO Check ("Signed-Off-By")
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v4
     - name: Set up Python 3.x
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v1
       with:
         python-version: '3.x'
     - name: Check DCO

.github/workflows/docker-image.yaml

@@ -18,16 +18,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Code checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@v1
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v1
 
       - name: Login to ghcr
-        uses: docker/login-action@v3
+        uses: docker/login-action@v2
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -36,17 +36,17 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v4
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           # generate Docker tags based on the following events/attributes
           tags: |
-            type=raw,value=20250815-0
+            type=raw,value={{date 'YYYYMMDD'}}-0
             type=sha
 
       - name: Build and push
         if: ${{ github.event_name == 'push' }}
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v2
         with:
           file: ./resources/Dockerfile
           platforms: linux/amd64,linux/arm64
@@ -55,7 +55,7 @@ jobs:
 
       - name: Build only
         if: ${{ github.event_name == 'pull_request' }}
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v2
         with:
           file: ./resources/Dockerfile
           platforms: linux/amd64,linux/arm64

.github/workflows/formatting.yaml

@@ -1,32 +0,0 @@
-name: Cloud Hypervisor Code Formatting
-on: [pull_request, merge_group]
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build:
-    name: Code Formatting
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        rust:
-          - nightly
-        target:
-          - x86_64-unknown-linux-gnu
-          - aarch64-unknown-linux-musl
-    env:
-      RUSTFLAGS: -D warnings
-    steps:
-      - name: Code checkout
-        uses: actions/checkout@v5
-      - name: Install Rust toolchain (${{ matrix.rust }})
-        uses: dtolnay/rust-toolchain@stable
-        with:
-            toolchain: ${{ matrix.rust }}
-            target: ${{ matrix.target }}
-            components: rustfmt
-      - name: Formatting (rustfmt)
-        run: cargo fmt --all -- --check
-      - name: Formatting (fuzz) (rustfmt)
-        run: cargo fmt --all --manifest-path fuzz/Cargo.toml -- --check

.github/workflows/fuzz-build.yaml

@@ -14,19 +14,18 @@ jobs:
           - nightly
         target:
           - x86_64-unknown-linux-gnu
-    env:
-      RUSTFLAGS: -D warnings
     steps:
       - name: Code checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
       - name: Install Rust toolchain (${{ matrix.rust }})
-        uses: dtolnay/rust-toolchain@stable
+        uses: actions-rs/toolchain@v1
         with:
             toolchain: ${{ matrix.rust }}
             target: ${{ matrix.target }}
+            override: true
       - name: Install Cargo fuzz
-        run: cargo install cargo-fuzz
-      - name: Fuzz Build
+        # 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
-      - name: Fuzz Check
-        run: cargo fuzz check

.github/workflows/gitlint.yaml

@@ -8,12 +8,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v4
       with:
         ref: ${{ github.event.pull_request.head.sha }}
         fetch-depth: 0
     - name: Set up Python 3.10
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v3
       with:
         python-version: "3.10"
     - name: Install dependencies

.github/workflows/hadolint.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: Lint Dockerfile
         uses: hadolint/hadolint-action@master

.github/workflows/integration-arm64.yaml

@@ -6,14 +6,14 @@ concurrency:
 
 jobs:
   build:
-    timeout-minutes: 120
+    timeout-minutes: 60
     name: Tests (ARM64)
-    runs-on: bookworm-arm64
+    runs-on: focal-arm64
     steps:
       - name: Fix workspace permissions
-        run: sudo chown -R runner:runner ${GITHUB_WORKSPACE}
+        run: sudo chown -R github-runner:github-runner ${GITHUB_WORKSPACE}
       - name: Code checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Run unit tests (musl)
@@ -21,14 +21,14 @@ jobs:
       - name: Load openvswitch module
         run: sudo modprobe openvswitch
       - name: Run integration tests (musl)
-        timeout-minutes: 60
+        timeout-minutes: 30
         run: scripts/dev_cli.sh tests --integration --libc musl
       - name: Install Azure CLI
         if: ${{ github.event_name != 'pull_request' }}
         run: |
           sudo apt install -y ca-certificates curl apt-transport-https lsb-release gnupg
           curl -sL https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/microsoft.gpg > /dev/null
-          echo "deb [arch=arm64] https://packages.microsoft.com/repos/azure-cli/ bookworm main" | sudo tee /etc/apt/sources.list.d/azure-cli.list
+          echo "deb [arch=arm64] https://packages.microsoft.com/repos/azure-cli/ focal main" | sudo tee /etc/apt/sources.list.d/azure-cli.list
           sudo apt update
           sudo apt install -y azure-cli
       - name: Download Windows image

.github/workflows/integration-metrics.yaml

@@ -7,12 +7,12 @@ on:
 jobs:
   build:
     name: Tests (Metrics)
-    runs-on: bare-metal-9950x
+    runs-on: jammy-metrics
     env:
       METRICS_PUBLISH_KEY: ${{ secrets.METRICS_PUBLISH_KEY }}
     steps:
       - name: Code checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Run metrics tests

.github/workflows/integration-rate-limiter.yaml

@@ -7,18 +7,21 @@ concurrency:
 jobs:
   build:
     name: Tests (Rate-Limiter)
-    runs-on: ${{ github.event_name == 'pull_request' && 'ubuntu-latest' || 'bare-metal-9950x' }}
+    runs-on: ${{ github.event_name == 'pull_request' && 'ubuntu-latest' || 'jammy-rate-limiter' }}
     env:
       AUTH_DOWNLOAD_TOKEN: ${{ secrets.AUTH_DOWNLOAD_TOKEN }}
     steps:
+      - name: Fix workspace permissions
+        if: ${{ github.event_name != 'pull_request' }}
+        run: sudo chown -R github-runner:github-runner ${GITHUB_WORKSPACE}
       - name: Code checkout
         if: ${{ github.event_name != 'pull_request' }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Run rate-limiter integration tests
         if: ${{ github.event_name != 'pull_request' }}
-        timeout-minutes: 20
+        timeout-minutes: 10
         run: scripts/dev_cli.sh tests --integration-rate-limiter
       - name: Skipping build for PR
         if: ${{ github.event_name == 'pull_request' }}

.github/workflows/integration-sgx.yaml

@@ -0,0 +1,32 @@
+name: Cloud Hypervisor Tests (SGX)
+on: [merge_group, pull_request]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    name: Tests (SGX)
+    runs-on: ${{ github.event_name == 'pull_request' && 'ubuntu-latest' || 'jammy-sgx' }}
+    env:
+      AUTH_DOWNLOAD_TOKEN: ${{ secrets.AUTH_DOWNLOAD_TOKEN }}
+    steps:
+      - name: Fix workspace permissions
+        if: ${{ github.event_name != 'pull_request' }}
+        run: sudo chown -R github-runner:github-runner ${GITHUB_WORKSPACE}
+      - name: Code checkout
+        if: ${{ github.event_name != 'pull_request' }}
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Run SGX integration tests
+        if: ${{ github.event_name != 'pull_request' }}
+        timeout-minutes: 10
+        run: scripts/dev_cli.sh tests --integration-sgx
+      - name: Run SGX integration tests for musl
+        if: ${{ github.event_name != 'pull_request' }}
+        timeout-minutes: 10
+        run: scripts/dev_cli.sh tests --integration-sgx --libc musl
+      - name: Skipping build for PR
+        if: ${{ github.event_name == 'pull_request' }}
+        run: echo "Skipping build for PR"

.github/workflows/integration-vfio.yaml

@@ -7,27 +7,26 @@ concurrency:
 jobs:
   build:
     name: Tests (VFIO)
-    runs-on: ${{ github.event_name == 'pull_request' && 'ubuntu-latest' || 'vfio-nvidia' }}
+    runs-on: ${{ github.event_name == 'pull_request' && 'ubuntu-latest' || 'jammy-vfio' }}
     env:
       AUTH_DOWNLOAD_TOKEN: ${{ secrets.AUTH_DOWNLOAD_TOKEN }}
     steps:
       - name: Fix workspace permissions
         if: ${{ github.event_name != 'pull_request' }}
-        run: sudo chown -R runner:runner ${GITHUB_WORKSPACE}
+        run: sudo chown -R github-runner:github-runner ${GITHUB_WORKSPACE}
       - name: Code checkout
         if: ${{ github.event_name != 'pull_request' }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Run VFIO integration tests
         if: ${{ github.event_name != 'pull_request' }}
         timeout-minutes: 15
         run: scripts/dev_cli.sh tests --integration-vfio
-      # Most tests are failing with musl see #6790
-      # - name: Run VFIO integration tests for musl
-      #   if: ${{ github.event_name != 'pull_request' }}
-      #   timeout-minutes: 15
-      #   run: scripts/dev_cli.sh tests --integration-vfio --libc musl
+      - name: Run VFIO integration tests for musl
+        if: ${{ github.event_name != 'pull_request' }}
+        timeout-minutes: 15
+        run: scripts/dev_cli.sh tests --integration-vfio --libc musl
       - name: Skipping build for PR
         if: ${{ github.event_name == 'pull_request' }}
         run: echo "Skipping build for PR"

.github/workflows/integration-windows.yaml

@@ -11,7 +11,7 @@ jobs:
     steps:
       - name: Code checkout
         if: ${{ github.event_name != 'pull_request' }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Install Docker

.github/workflows/integration-x86-64.yaml

@@ -17,7 +17,7 @@ jobs:
     steps:
       - name: Code checkout
         if: ${{ github.event_name != 'pull_request' || (matrix.runner == 'garm-jammy' && matrix.libc == 'gnu') }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Install Docker

.github/workflows/lychee.yaml

@@ -1,45 +0,0 @@
-name: Link Check (lychee)
-on: pull_request
-jobs:
-  link_check:
-    name: Link Check
-    runs-on: ubuntu-latest
-    steps:
-      - name: Code checkout
-        uses: actions/checkout@v5
-        with:
-          # Fetch the entire history so git diff can compare against the base branch
-          fetch-depth: 0
-      - name: Get changed files in PR
-        id: changed-files
-        uses: tj-actions/changed-files@v46 # Using a dedicated action for robustness
-        with:
-          # Compare the HEAD of the PR with the merge-base (where the PR branches off)
-          base_sha: ${{ github.event.pull_request.base.sha }}
-
-      # NEW STEP: Print all changed-files outputs for verification
-      - name: Verify Changed Files
-        run: |
-          echo "--- tj-actions/changed-files Outputs ---"
-          echo "any_changed: ${{ steps.changed-files.outputs.any_changed }}"
-          echo "all_changed_files: ${{ steps.changed-files.outputs.all_changed_files }}"
-          echo "added_files: ${{ steps.changed-files.outputs.added_files }}"
-          echo "modified_files: ${{ steps.changed-files.outputs.modified_files }}"
-          echo "deleted_files: ${{ steps.changed-files.outputs.deleted_files }}"
-          echo "renamed_files: ${{ steps.changed-files.outputs.renamed_files }}"
-          echo "----------------------------------------"
-          # This will also show if the all_changed_files string is empty or not
-          if [ -n "${{ steps.changed-files.outputs.all_changed_files }}" ]; then
-            echo "Detected changes: all_changed_files output is NOT empty."
-          else
-            echo "No changes detected: all_changed_files output IS empty."
-          fi
-      - name: Link Availability Check (Diff Only)
-        # MODIFIED: Only run lychee if the 'all_changed_files' output is not an empty string
-        if: ${{ steps.changed-files.outputs.all_changed_files != '' }}
-        uses: lycheeverse/lychee-action@master
-        with:
-          # Pass the space-separated list of changed files to lychee
-          args: --verbose --config .lychee.toml ${{ steps.changed-files.outputs.all_changed_files }}
-          failIfEmpty: false
-          fail: true

.github/workflows/openapi.yaml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     container: openapitools/openapi-generator-cli
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v4
     - name: Validate OpenAPI
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/package-consistency.yaml

@@ -1,32 +0,0 @@
-name: Cloud Hypervisor Consistency
-on: [pull_request, merge_group]
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build:
-    name: Rust VMM Consistency Check
-    runs-on: ubuntu-latest
-    steps:
-      - name: Code checkout
-        uses: actions/checkout@v5
-        with:
-          fetch-depth: 0
-
-      - name: Install dependencies
-        run: sudo apt install -y python3
-
-      - name: Install Rust toolchain stable
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: stable
-
-      - name: Check Rust VMM Package Consistency of root Workspace
-        run: python3 scripts/package-consistency-check.py github.com/rust-vmm
-
-      - name: Check Rust VMM Package Consistency of fuzz Workspace
-        run: |
-          pushd fuzz
-          python3 ../scripts/package-consistency-check.py github.com/rust-vmm
-          popd

.github/workflows/preview-riscv64-build.yaml

@@ -1,30 +0,0 @@
-name: Cloud Hypervisor RISC-V 64-bit kvm build Preview
-on: [pull_request, merge_group]
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build:
-    name: Cargo
-    runs-on: riscv64-qemu-host
-    strategy:
-      fail-fast: false
-
-    steps:
-      - name: Code checkout
-        uses: actions/checkout@v5
-        with:
-          fetch-depth: 0
-
-      - name: Install Rust toolchain
-        run: /opt/scripts/exec-in-qemu.sh rustup default 1.88.0
-
-      - name: Build test (kvm)
-        run: /opt/scripts/exec-in-qemu.sh cargo rustc --locked --no-default-features --features "kvm"
-
-      - name: Clippy test (kvm)
-        run: /opt/scripts/exec-in-qemu.sh cargo clippy --locked --no-default-features --features "kvm"
-
-      - name: Check no files were modified
-        run: test -z "$(git status --porcelain)"

.github/workflows/preview-riscv64-modules.yaml

@@ -1,39 +0,0 @@
-name: Cloud Hypervisor RISC-V 64-bit Preview
-on: [pull_request, merge_group]
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build:
-    name: Cargo
-    runs-on: riscv64-qemu-host
-    strategy:
-      fail-fast: false
-      matrix:
-        module:
-          - hypervisor
-          - arch
-          - vm-allocator
-          - devices
-
-    steps:
-      - name: Code checkout
-        uses: actions/checkout@v5
-        with:
-          fetch-depth: 0
-
-      - name: Install Rust toolchain
-        run: /opt/scripts/exec-in-qemu.sh rustup default 1.88.0
-
-      - name: Build ${{ matrix.module }} Module (kvm)
-        run: /opt/scripts/exec-in-qemu.sh cargo rustc --locked -p ${{ matrix.module }} --no-default-features --features "kvm" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Clippy ${{ matrix.module }} Module (kvm)
-        run: /opt/scripts/exec-in-qemu.sh cargo clippy --locked -p ${{ matrix.module }} --no-default-features --features "kvm" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Test ${{ matrix.module }} Module (kvm)
-        run: /opt/scripts/exec-in-qemu.sh cargo test --locked -p ${{ matrix.module }} --no-default-features --features "kvm"
-
-      - name: Check no files were modified
-        run: test -z "$(git status --porcelain)"

.github/workflows/quality.yaml

@@ -6,14 +6,13 @@ concurrency:
 
 jobs:
   build:
-    name: Quality (clippy)
+    name: Quality (clippy, rustfmt)
     runs-on: ubuntu-latest
     continue-on-error: ${{ matrix.experimental }}
     strategy:
       fail-fast: false
       matrix:
         rust:
-          - beta
           - stable
         target:
           - aarch64-unknown-linux-gnu
@@ -21,15 +20,23 @@ jobs:
           - x86_64-unknown-linux-gnu
           - x86_64-unknown-linux-musl
 
+        experimental: [false]
         include:
           - rust: beta
+            target: aarch64-unknown-linux-gnu
+            experimental: true
+          - rust: beta
+            target: aarch64-unknown-linux-musl
+            experimental: true
+          - rust: beta
+            target: x86_64-unknown-linux-gnu
+            experimental: true
+          - rust: beta
+            target: x86_64-unknown-linux-musl
             experimental: true
-          - rust: stable
-            experimental: false
-
     steps:
       - name: Code checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -39,7 +46,7 @@ jobs:
           toolchain: ${{ matrix.rust }}
           target: ${{ matrix.target }}
           override: true
-          components: clippy
+          components: rustfmt, clippy
 
       - name: Bisectability Check (default features)
         if: ${{ github.event_name == 'pull_request' && matrix.target == 'x86_64-unknown-linux-gnu' }}
@@ -49,113 +56,76 @@ jobs:
           for commit in $commits; do git checkout $commit; cargo check --tests --examples --all --target=${{ matrix.target }}; done
           git checkout ${{ github.sha }}
 
+      - name: Formatting (rustfmt)
+        run: cargo fmt -- --check
+
       - name: Clippy (kvm)
-        uses: houseabsolute/actions-rust-cross@v1
-        with:
-          command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --no-default-features --tests --examples --features "kvm" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Clippy (mshv)
-        uses: houseabsolute/actions-rust-cross@v1
-        with:
-          command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --no-default-features --tests --examples --features "mshv" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Clippy (mshv + kvm)
-        uses: houseabsolute/actions-rust-cross@v1
-        with:
-          command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --no-default-features --tests --examples --features "mshv,kvm" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Clippy (default features)
-        uses: houseabsolute/actions-rust-cross@v1
-        with:
-          command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --tests --examples -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Clippy (default features + guest_debug)
-        uses: houseabsolute/actions-rust-cross@v1
-        with:
-          command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --tests --examples --features "guest_debug" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Clippy (default features + pvmemcontrol)
-        uses: houseabsolute/actions-rust-cross@v1
-        with:
-          command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --tests --examples --features "pvmemcontrol" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-
-      - name: Clippy (default features + tracing)
-        uses: houseabsolute/actions-rust-cross@v1
-        with:
-          command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --tests --examples --features "tracing" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
-      - name: Clippy (default features + fw_cfg)
         uses: actions-rs/cargo@v1
         with:
           use-cross: ${{ matrix.target != 'x86_64-unknown-linux-gnu' }}
           command: clippy
-          args: --target=${{ matrix.target }} --locked --all --all-targets --tests --examples --features "fw_cfg" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+          args: --target=${{ matrix.target }} --locked --all --all-targets --no-default-features --tests --examples --features "kvm" -- -D warnings -D clippy::undocumented_unsafe_blocks
 
-      - name: Clippy (default features + ivshmem)
-        uses: houseabsolute/actions-rust-cross@v1
+      - name: Clippy (default features)
+        uses: actions-rs/cargo@v1
         with:
+          use-cross: ${{ matrix.target != 'x86_64-unknown-linux-gnu' }}
           command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --tests --examples --features "ivshmem" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+          args: --target=${{ matrix.target }} --locked --all --all-targets --tests --examples -- -D warnings -D clippy::undocumented_unsafe_blocks
+
+      - name: Clippy (default features + guest_debug)
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: ${{ matrix.target != 'x86_64-unknown-linux-gnu' }}
+          command: clippy
+          args: --target=${{ matrix.target }} --locked --all --all-targets --tests --examples --features "guest_debug" -- -D warnings -D clippy::undocumented_unsafe_blocks
+
+      - name: Clippy (default features + tracing)
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: ${{ matrix.target != 'x86_64-unknown-linux-gnu' }}
+          command: clippy
+          args: --target=${{ matrix.target }} --locked --all --all-targets --tests --examples --features "tracing" -- -D warnings -D clippy::undocumented_unsafe_blocks
+
+      - name: Clippy (mshv)
+        if: ${{ matrix.target == 'x86_64-unknown-linux-gnu' }}
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: ${{ matrix.target != 'x86_64-unknown-linux-gnu' }}
+          command: clippy
+          args: --target=${{ matrix.target }} --locked --all --all-targets --no-default-features --tests --examples --features "mshv" -- -D warnings -D clippy::undocumented_unsafe_blocks
+
+      - name: Clippy (mshv + kvm)
+        if: ${{ matrix.target == 'x86_64-unknown-linux-gnu' }}
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: ${{ matrix.target != 'x86_64-unknown-linux-gnu' }}
+          command: clippy
+          args: --target=${{ matrix.target }} --locked --all --all-targets --no-default-features --tests --examples --features "mshv,kvm" -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Clippy (sev_snp)
         if: ${{ matrix.target == 'x86_64-unknown-linux-gnu' }}
-        uses: houseabsolute/actions-rust-cross@v1
+        uses: actions-rs/cargo@v1
         with:
+          use-cross: ${{ matrix.target != 'x86_64-unknown-linux-gnu' }}
           command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --no-default-features --tests --examples --features "sev_snp" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+          args: --target=${{ matrix.target }} --locked --all --all-targets --no-default-features --tests --examples --features "sev_snp" -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Clippy (igvm)
         if: ${{ matrix.target == 'x86_64-unknown-linux-gnu' }}
-        uses: houseabsolute/actions-rust-cross@v1
+        uses: actions-rs/cargo@v1
         with:
+          use-cross: ${{ matrix.target != 'x86_64-unknown-linux-gnu' }}
           command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --no-default-features --tests --examples --features "igvm" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+          args: --target=${{ matrix.target }} --locked --all --all-targets --no-default-features --tests --examples --features "igvm" -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Clippy (kvm + tdx)
         if: ${{ matrix.target == 'x86_64-unknown-linux-gnu' }}
-        uses: houseabsolute/actions-rust-cross@v1
+        uses: actions-rs/cargo@v1
         with:
+          use-cross: ${{ matrix.target != 'x86_64-unknown-linux-gnu' }}
           command: clippy
-          cross-version: 3e0957637b49b1bbced23ad909170650c5b70635
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          args: --locked --all --all-targets --no-default-features --tests --examples --features "tdx,kvm" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states
+          args: --target=${{ matrix.target }} --locked --all --all-targets --no-default-features --tests --examples --features "tdx,kvm" -- -D warnings -D clippy::undocumented_unsafe_blocks
 
       - name: Check build did not modify any files
         run: test -z "$(git status --porcelain)"
@@ -165,6 +135,6 @@ jobs:
     name: Typos / Spellcheck
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       # Executes "typos ."
-      - uses: crate-ci/typos@v1.36.2
+      - uses: crate-ci/typos@v1.16.11

.github/workflows/release.yaml

@@ -3,67 +3,135 @@ on: [create, merge_group]
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
   cancel-in-progress: true
-env:
-  GITHUB_TOKEN: ${{ github.token }}
 
 jobs:
   release:
     if: (github.event_name == 'create' && github.event.ref_type == 'tag') || github.event_name == 'merge_group'
-    name: Release ${{ matrix.platform.target }}
-    strategy:
-      fail-fast: false
-      matrix:
-        platform:
-        - target: x86_64-unknown-linux-gnu
-          args: --all --release --features mshv
-          name_ch: cloud-hypervisor
-          name_ch_remote: ch-remote
-        - target: x86_64-unknown-linux-musl
-          args: --all --release --features mshv
-          name_ch: cloud-hypervisor-static
-          name_ch_remote: ch-remote-static
-        - target: aarch64-unknown-linux-musl
-          args:  --all --release
-          name_ch: cloud-hypervisor-static-aarch64
-          name_ch_remote: ch-remote-static-aarch64
+    name: Release
     runs-on: ubuntu-latest
     steps:
       - name: Code checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
       - name: Install musl-gcc
-        if: contains(matrix.platform.target, 'musl')
         run: sudo apt install -y musl-tools
       - name: Create release directory
-        if: |
-          github.event_name == 'create' && github.event.ref_type == 'tag' &&
-          matrix.platform.target == 'x86_64-unknown-linux-gnu'
         run: rsync -rv --exclude=.git . ../cloud-hypervisor-${{ github.event.ref }}
-      - name: Build ${{ matrix.platform.target }}
-        uses: houseabsolute/actions-rust-cross@v1
+      - name: Install Rust toolchain (x86_64-unknown-linux-gnu)
+        uses: actions-rs/toolchain@v1
         with:
+          toolchain: "1.70"
+          target: x86_64-unknown-linux-gnu
+      - name: Install Rust toolchain (x86_64-unknown-linux-musl)
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: "1.70"
+          target: x86_64-unknown-linux-musl
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          toolchain: "1.70"
           command: build
-          target: ${{ matrix.platform.target }}
-          args: ${{ matrix.platform.args  }}
-          strip: true
-          toolchain: "1.88.0"
-      - name: Copy Release Binaries
-        if: github.event_name == 'create' && github.event.ref_type == 'tag'
-        shell: bash
-        run: |
-          cp target/${{ matrix.platform.target }}/release/cloud-hypervisor ./${{ matrix.platform.name_ch }}
-          cp target/${{ matrix.platform.target }}/release/ch-remote ./${{ matrix.platform.name_ch_remote }}
-      - name: Upload Release Artifacts
-        if: github.event_name == 'create' && github.event.ref_type == 'tag'
-        uses: actions/upload-artifact@v4
+          args: --all --release --features mshv --target=x86_64-unknown-linux-gnu
+      - name: Static Build
+        uses: actions-rs/cargo@v1
         with:
-          name: Artifacts for ${{ matrix.platform.target }}
-          path: |
-            ./${{ matrix.platform.name_ch }}
-            ./${{ matrix.platform.name_ch_remote }}
+          toolchain: "1.70"
+          command: build
+          args: --all --release --features mshv --target=x86_64-unknown-linux-musl
+      - name: Install Rust toolchain (aarch64-unknown-linux-musl)
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: "1.70"
+          target: aarch64-unknown-linux-musl
+          override: true
+      - name: Create Release
+        if: github.event_name == 'create' && github.event.ref_type == 'tag'
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
+          draft: true
+          prerelease: true
+      - name: Upload cloud-hypervisor
+        if: github.event_name == 'create' && github.event.ref_type == 'tag'
+        id: upload-release-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/x86_64-unknown-linux-gnu/release/cloud-hypervisor
+          asset_name: cloud-hypervisor
+          asset_content_type: application/octet-stream
+      - name: Upload static cloud-hypervisor
+        if: github.event_name == 'create' && github.event.ref_type == 'tag'
+        id: upload-release-static-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/x86_64-unknown-linux-musl/release/cloud-hypervisor
+          asset_name: cloud-hypervisor-static
+          asset_content_type: application/octet-stream
+      - name: Upload ch-remote
+        if: github.event_name == 'create' && github.event.ref_type == 'tag'
+        id: upload-release-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/x86_64-unknown-linux-gnu/release/ch-remote
+          asset_name: ch-remote
+          asset_content_type: application/octet-stream
+      - name: Upload static-ch-remote
+        if: github.event_name == 'create' && github.event.ref_type == 'tag'
+        id: upload-release-static-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/x86_64-unknown-linux-musl/release/ch-remote
+          asset_name: ch-remote-static
+          asset_content_type: application/octet-stream
+      - name: Clean build tree ahead of cross build
+        uses: actions-rs/cargo@v1
+        with:
+          command: clean
+      - name: Static Build (AArch64)
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: true
+          command: build
+          args: --all --release --target=aarch64-unknown-linux-musl
+      - name: Upload static AArch64 cloud-hypervisor
+        if: github.event_name == 'create' && github.event.ref_type == 'tag'
+        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
+        if: github.event_name == 'create' && github.event.ref_type == 'tag'
+        id: upload-release-static-aarch64-ch-remote
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: target/aarch64-unknown-linux-musl/release/ch-remote
+          asset_name: ch-remote-static-aarch64
+          asset_content_type: application/octet-stream
       - name: Vendor
-        if: |
-          github.event_name == 'create' && github.event.ref_type == 'tag' &&
-          matrix.platform.target == 'x86_64-unknown-linux-gnu'
         working-directory: ../cloud-hypervisor-${{ github.event.ref }}
         run: |
           mkdir ../vendor-cargo-home
@@ -71,25 +139,16 @@ jobs:
           mkdir .cargo
           cargo vendor > .cargo/config.toml
       - name: Create vendored source archive
-        if: |
-          github.event_name == 'create' && github.event.ref_type == 'tag' &&
-          matrix.platform.target == 'x86_64-unknown-linux-gnu'
-        run: tar cJf cloud-hypervisor-${{ github.event.ref }}.tar.xz ../cloud-hypervisor-${{ github.event.ref }}
+        working-directory: ../
+        run: tar cJf cloud-hypervisor-${{ github.event.ref }}.tar.xz cloud-hypervisor-${{ github.event.ref }}
       - name: Upload cloud-hypervisor vendored source archive
-        if: |
-          github.event_name == 'create' && github.event.ref_type == 'tag' &&
-          matrix.platform.target == 'x86_64-unknown-linux-gnu'
-        id: upload-release-cloud-hypervisor-vendored-sources
-        uses: actions/upload-artifact@v4
-        with:
-          path: cloud-hypervisor-${{ github.event.ref }}.tar.xz
-          name: cloud-hypervisor-${{ github.event.ref }}.tar.xz
-      - name: Create GitHub Release
         if: github.event_name == 'create' && github.event.ref_type == 'tag'
-        uses: softprops/action-gh-release@v2
+        id: upload-release-cloud-hypervisor-vendored-sources
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          draft: true
-          files: |
-            ./${{ matrix.platform.name_ch }}
-            ./${{ matrix.platform.name_ch_remote }}
-            ./cloud-hypervisor-${{ github.event.ref }}.tar.xz
+          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

.github/workflows/reuse.yaml

@@ -1,12 +0,0 @@
-name: REUSE Compliance Check
-
-on: [push, pull_request]
-
-jobs:
-  reuse:
-    name: REUSE Compliance Check
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v5
-    - name: REUSE Compliance Check
-      uses: fsfe/reuse-action@v5

.github/workflows/shlint.yaml

@@ -1,20 +0,0 @@
-name: Shell scripts check
-on:
-  pull_request:
-  merge_group:
-  push:
-    branches:
-      - main
-
-jobs:
-  sh-checker:
-    name: Check shell scripts
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout repository
-      uses: actions/checkout@v5
-    - name: Run the shell script checkers
-      uses: luizm/action-sh-checker@master
-      env:
-        SHFMT_OPTS: -i 4 -d
-        SHELLCHECK_OPTS: -x --source-path scripts

.github/workflows/taplo.yaml

@@ -1,21 +0,0 @@
-name: Cargo.toml Formatting (taplo)
-on:
-  pull_request:
-    paths: 
-      - '**/Cargo.toml'
-
-jobs:
-  cargo_toml_format:
-    name: Cargo.toml Formatting
-    runs-on: ubuntu-latest
-    steps:
-      - name: Code checkout
-        uses: actions/checkout@v5
-      - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@stable
-      - name: Install build dependencies
-        run: sudo apt-get update && sudo apt-get -yqq install build-essential libssl-dev
-      - name: Install taplo
-        run: cargo install taplo-cli --locked
-      - name: Check formatting
-        run: taplo fmt --check

.gitignore

@@ -6,5 +6,3 @@
 **/rusty-tags.vi
 /rpm/SOURCES
 /.vscode
-/vendor
-__pycache__

.gitlint

@@ -1,7 +1,6 @@
 [general]
-extra-path=scripts/gitlint/rules
+extra-path=scripts/gitlint/rules.py
 regex-style-search=true
-ignore=body-max-line-length
 
 [ignore-by-author-name]
 regex=dependabot
@@ -11,3 +10,6 @@ ignore=all
 [title-max-length]
 line-length=72
 
+# default 80
+[body-max-line-length]
+line-length=72

.lychee.toml

@@ -1,27 +0,0 @@
-verbose = "info"
-
-exclude = [
-    # Availability of links below should be manually verified.
-    # Page for intel TDX support, returns 403 while querying.
-    '^https://www.intel.com/content/www/us/en/developer/tools/trust-domain-extensions/overview.html',
-    # Page for TPM, returns 403 while querying.
-    '^https://trustedcomputinggroup.org/wp-content/uploads/PC-Client-Specific-Platform-TPM-Profile-for-TPM-2p0-v1p05p_r14_pub.pdf',
-
-    # GitHub user smibarber referenced in `CREDITS.md` no longer exist
-    '^https://github.com/smibarber',
-
-    # OSDev has added bot protection and accesses my result in 403 Forbidden.
-    '^https://wiki.osdev.org',
-    # Exclude all pages with $ in the URL since $XXX is a variable
-    "\\$.*",
-    # Exclude local files
-    "file://.*",
-]
-
-# Exclude loopback addresses
-exclude_loopback = true
-
-
-max_retries = 3
-
-retry_wait_time = 5

.reuse/dep5

@@ -1,12 +0,0 @@
-Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: cloud-hypervisor
-Upstream-Contact:  <>
-Source: https://www.cloudhypervisor.org
-
-Files: docs/*.md *.md
-Copyright: 2024
-License: CC-BY-4.0
-
-Files: scripts/* test_data/* *.toml .git* fuzz/Cargo.lock fuzz/.gitignore resources/linux-config-* vmm/src/api/openapi/cloud-hypervisor.yaml CODEOWNERS Cargo.lock
-Copyright: 2024
-License: Apache-2.0

.rustfmt.toml

@@ -1,4 +1 @@
-edition = "2024"
-group_imports="StdExternalCrate"
-imports_granularity="Module"
-
+edition = "2021"

.taplo.toml

@@ -1,5 +0,0 @@
-include = ["**/Cargo.toml"]
-
-[formatting]
-reorder_arrays = true
-reorder_keys = true

.typos.toml

@@ -7,15 +7,12 @@ extend-exclude = [
 ]
 
 [default.extend-words]
+ba = "ba"
 CLASSE = "CLASSE"
+conectix = "conectix"
 Dake = "Dake"
 EXTINT = "EXTINT"
 INOUT = "INOUT"
-SME = "SME" # Secure Memory Encryption
-THR = "THR" # Transmitter Holding Register
-TRANSLATER = "TRANSLATER"
-ba = "ba"
-conectix = "conectix"
 liness = "liness"
 outout = "outout"
 

CONTRIBUTING.md

@@ -13,7 +13,7 @@ License](https://opensource.org/licenses/Apache-2.0).
 
 ## Coding Style
 
-We follow the [Rust Style](https://github.com/rust-lang/rust/tree/HEAD/src/doc/style-guide/src)
+We follow the [Rust Style](https://github.com/rust-dev-tools/fmt-rfcs/blob/master/guide/guide.md)
 convention and enforce it through the Continuous Integration (CI) process calling into `rustfmt`
 for each submitted Pull Request (PR).
 
@@ -36,7 +36,7 @@ commit you make.
 
 ## Certificate of Origin
 
-In order to get a clear contribution chain of trust we use the [signed-off-by language](https://web.archive.org/web/20230406041855/https://01.org/community/signed-process)
+In order to get a clear contribution chain of trust we use the [signed-off-by language](https://01.org/community/signed-process)
 used by the Linux kernel project.
 
 ## Patch format
@@ -79,12 +79,12 @@ you want to merge your changes to `cloud-hypervisor`:
 
 1. Fork the [cloud-hypervisor](https://github.com/cloud-hypervisor/cloud-hypervisor) project
    into your github organization.
-1. Within your fork, create a branch for your contribution.
-1. [Create a pull request](https://help.github.com/articles/creating-a-pull-request-from-a-fork/)
+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 main branch of the Cloud Hypervisor repository.
-1. To update your pull request amend existing commits whenever applicable and
+4. To update your pull request amend existing commits whenever applicable and
    then push the new changes to your pull request branch.
-1. Once the pull request is approved it can be integrated.
+5. Once the pull request is approved it can be integrated.
 
 ## Issue tracking
 
@@ -112,15 +112,5 @@ Fixes #88
 Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
 ```
 
-Then, after the corresponding PR is merged, GitHub will automatically close that issue when parsing the
+Then, after the corresponding PR is merged, Github will automatically close that issue when parsing the
 [commit message](https://help.github.com/articles/closing-issues-via-commit-messages/).
-
-## AI Generated Code
-
-Our policy is to decline any contributions known to contain contents
-generated or derived from using Large Language Models (LLMs). This
-includes ChatGPT, Gemini, Claude, Copilot and similar tools.
-
-The goal is to avoid ambiguity in license compliance and optimize the
-use of limited project resources, especially for code review and
-maintenance. This policy can be revisited as LLMs evolve and mature.

Cargo.toml

@@ -1,155 +1,106 @@
 [package]
-authors = ["The Cloud Hypervisor Authors"]
-build = "build.rs"
-default-run = "cloud-hypervisor"
-description = "Open source Virtual Machine Monitor (VMM) that runs on top of KVM & MSHV"
-edition = "2024"
-homepage = "https://github.com/cloud-hypervisor/cloud-hypervisor"
-license = "Apache-2.0 AND BSD-3-Clause"
 name = "cloud-hypervisor"
-version = "48.0.0"
+version = "37.1.0"
+authors = ["The Cloud Hypervisor Authors"]
+edition = "2021"
+default-run = "cloud-hypervisor"
+build = "build.rs"
+license = "LICENSE-APACHE & LICENSE-BSD-3-Clause"
+description = "Open source Virtual Machine Monitor (VMM) that runs on top of KVM"
+homepage = "https://github.com/cloud-hypervisor/cloud-hypervisor"
 # Minimum buildable version:
 # Keep in sync with version in .github/workflows/build.yaml
 # Policy on MSRV (see #4318):
-# Can only be bumped if satisfying any of the following:
+# Can only be bumped by:
 # a.) A dependency requires it,
 # b.) If we want to use a new feature and that MSRV is at least 6 months old,
 # c.) There is a security issue that is addressed by the toolchain update.
-rust-version = "1.88.0"
+rust-version = "1.70"
 
 [profile.release]
-codegen-units = 1
 lto = true
+codegen-units = 1
 opt-level = "s"
 strip = true
 
 [profile.profiling]
-debug = true
 inherits = "release"
 strip = false
+debug = true
 
 [dependencies]
-anyhow = { workspace = true }
+anyhow = "1.0.75"
 api_client = { path = "api_client" }
-clap = { workspace = true, features = ["string"] }
-dhat = { workspace = true, optional = true }
-env_logger = { workspace = true }
-epoll = { workspace = true }
+clap = { version = "4.4.7", features = ["string"] }
+dhat = { version = "0.3.2", optional = true }
+epoll = "4.3.3"
 event_monitor = { path = "event_monitor" }
 hypervisor = { path = "hypervisor" }
-libc = { workspace = true }
-log = { workspace = true, features = ["std"] }
+libc = "0.2.147"
+log = { version = "0.4.20", features = ["std"] }
 option_parser = { path = "option_parser" }
-seccompiler = { workspace = true }
-serde_json = { workspace = true }
-signal-hook = { workspace = true }
-thiserror = { workspace = true }
-tpm = { path = "tpm" }
+seccompiler = "0.4.0"
+serde_json = "1.0.107"
+signal-hook = "0.3.17"
+thiserror = "1.0.40"
+tpm = { path = "tpm"}
 tracer = { path = "tracer" }
-vm-memory = { workspace = true }
 vmm = { path = "vmm" }
-vmm-sys-util = { workspace = true }
-zbus = { version = "5.7.1", optional = true }
+vmm-sys-util = "0.12.1"
+vm-memory = "0.14.0"
+zbus = { version = "3.11.1", optional = true }
+
+# List of patched crates
+[patch.crates-io]
+kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch-live-upgrade-stable-37.x" }
+versionize_derive = { git = "https://github.com/cloud-hypervisor/versionize_derive", branch = "ch-0.1.6" }
 
 [dev-dependencies]
-dirs = { workspace = true }
+dirs = "5.0.0"
 net_util = { path = "net_util" }
-serde_json = { workspace = true }
+once_cell = "1.18.0"
+serde_json = "1.0.107"
 test_infra = { path = "test_infra" }
-wait-timeout = { workspace = true }
+wait-timeout = "0.2.0"
 
 # Please adjust `vmm::feature_list()` accordingly when changing the
 # feature list below
 [features]
-dbus_api = ["vmm/dbus_api", "zbus"]
-default = ["io_uring", "kvm"]
-dhat-heap = ["dhat", "vmm/dhat-heap"]       # For heap profiling
-fw_cfg = ["vmm/fw_cfg"]
+default = ["kvm", "io_uring"]
+dbus_api = ["zbus", "vmm/dbus_api"]
+dhat-heap = ["dhat"] # For heap profiling
 guest_debug = ["vmm/guest_debug"]
-igvm = ["mshv", "vmm/igvm"]
+igvm = ["vmm/igvm", "mshv"]
 io_uring = ["vmm/io_uring"]
-ivshmem = ["vmm/ivshmem"]
 kvm = ["vmm/kvm"]
 mshv = ["vmm/mshv"]
-pvmemcontrol = ["vmm/pvmemcontrol"]
-sev_snp = ["igvm", "mshv", "vmm/sev_snp"]
+sev_snp = ["igvm", "vmm/sev_snp", "mshv"]
 tdx = ["vmm/tdx"]
-tracing = ["tracer/tracing", "vmm/tracing"]
+tracing = ["vmm/tracing", "tracer/tracing"]
 
 [workspace]
 members = [
-  "api_client",
-  "arch",
-  "block",
-  "devices",
-  "event_monitor",
-  "hypervisor",
-  "net_gen",
-  "net_util",
-  "option_parser",
-  "pci",
-  "performance-metrics",
-  "rate_limiter",
-  "serial_buffer",
-  "test_infra",
-  "tracer",
-  "vhost_user_block",
-  "vhost_user_net",
-  "virtio-devices",
-  "vm-allocator",
-  "vm-device",
-  "vm-migration",
-  "vm-virtio",
-  "vmm",
+    "api_client",
+    "arch",
+    "block",
+    "devices",
+    "event_monitor",
+    "hypervisor",
+    "net_gen",
+    "net_util",
+    "option_parser",
+    "pci",
+    "performance-metrics",
+    "rate_limiter",
+    "serial_buffer",
+    "test_infra",
+    "tracer",
+    "vhost_user_block",
+    "vhost_user_net",
+    "virtio-devices",
+    "vmm",
+    "vm-allocator",
+    "vm-device",
+    "vm-migration",
+    "vm-virtio"
 ]
-package.edition = "2024"
-
-[workspace.dependencies]
-# rust-vmm crates
-acpi_tables = { git = "https://github.com/rust-vmm/acpi_tables", branch = "main" }
-kvm-bindings = "0.12.0"
-kvm-ioctls = "0.22.0"
-# TODO: update to 0.13.1+
-linux-loader = { git = "https://github.com/rust-vmm/linux-loader", branch = "main" }
-mshv-bindings = "0.6.0"
-mshv-ioctls = "0.6.0"
-seccompiler = "0.5.0"
-vfio-bindings = { version = "0.6.0", default-features = false }
-vfio-ioctls = { version = "0.5.1", default-features = false }
-vfio_user = { version = "0.1.1", default-features = false }
-vhost = { version = "0.14.0", default-features = false }
-vhost-user-backend = { version = "0.20.0", default-features = false }
-virtio-bindings = "0.2.6"
-virtio-queue = "0.16.0"
-vm-fdt = { git = "https://github.com/rust-vmm/vm-fdt", branch = "main" }
-vm-memory = "0.16.1"
-vmm-sys-util = "0.14.0"
-
-# igvm crates
-# TODO: bump to 0.3.5 release
-igvm = { git = "https://github.com/microsoft/igvm", branch = "main" }
-igvm_defs = { git = "https://github.com/microsoft/igvm", branch = "main" }
-
-# serde crates
-serde = "1.0.208"
-serde_json = "1.0.143"
-serde_with = { version = "3.14.0", default-features = false }
-
-# other crates
-anyhow = "1.0.98"
-bitflags = "2.9.4"
-byteorder = "1.5.0"
-cfg-if = "1.0.0"
-clap = "4.5.47"
-dhat = "0.3.3"
-dirs = "6.0.0"
-env_logger = "0.11.8"
-epoll = "4.3.3"
-flume = "0.11.1"
-libc = "0.2.167"
-log = "0.4.22"
-signal-hook = "0.3.18"
-thiserror = "2.0.12"
-uuid = { version = "1.18.1" }
-wait-timeout = "0.2.1"
-zerocopy = { version = "0.8.26", default-features = false }

README.md

@@ -59,13 +59,9 @@ based on the [Rust VMM](https://github.com/rust-vmm) crates.
 
 ### Architectures
 
-Cloud Hypervisor supports the `x86-64`, `AArch64` and `riscv64`
-architectures, with functionality varying across these platforms. The
-functionality differences between `x86-64` and `AArch64` are documented
-in [#1125](https://github.com/cloud-hypervisor/cloud-hypervisor/issues/1125).
-The `riscv64` architecture support is experimental and offers limited
-functionality. For more details and instructions, please refer to [riscv
-documentation](docs/riscv.md).
+Cloud Hypervisor supports the `x86-64` and `AArch64` architectures. There are
+minor differences in functionality between the two architectures
+(see [#1125](https://github.com/cloud-hypervisor/cloud-hypervisor/issues/1125)).
 
 ### Guest OS
 
@@ -112,7 +108,7 @@ do not wish to use the pre-built binaries.
 ## Booting Linux
 
 Cloud Hypervisor supports direct kernel boot (the x86-64 kernel requires the kernel
-built with PVH support or a bzImage) or booting via a firmware (either [Rust Hypervisor
+built with PVH support) or booting via a firmware (either [Rust Hypervisor
 Firmware](https://github.com/cloud-hypervisor/rust-hypervisor-firmware) or an
 edk2 UEFI firmware called `CLOUDHV` / `CLOUDHV_EFI`.)
 
@@ -153,7 +149,7 @@ interface will be enabled as per `network-config` details.
 $ sudo setcap cap_net_admin+ep ./cloud-hypervisor
 $ ./create-cloud-init.sh
 $ ./cloud-hypervisor \
-	--firmware ./hypervisor-fw \
+	--kernel ./hypervisor-fw \
 	--disk path=focal-server-cloudimg-amd64.raw path=/tmp/ubuntu-cloudinit.img \
 	--cpus boot=4 \
 	--memory size=1024M \
@@ -175,31 +171,24 @@ $ ./cloud-hypervisor \
 	--console off
 ```
 
-## Booting: `--firmware` vs `--kernel`
-
-The following scenarios are supported by Cloud Hypervisor to bootstrap a VM, i.e.,
-to load a payload/bootitem(s):
-
-- Provide firmware
-- Provide kernel \[+ cmdline\]\ [+ initrd\]
-
-Please note that our Cloud Hypervisor firmware (`hypervisor-fw`) has a Xen PVH
-boot entry, therefore it can also be booted via the `--kernel` parameter, as 
-seen in some examples.
-
 ### Custom Kernel and Disk Image
 
 #### Building your Kernel
 
-Cloud Hypervisor also supports direct kernel boot. For x86-64, a `vmlinux` ELF kernel (compiled with PVH support) or a regular bzImage are supported. In order to support development there is a custom branch; however provided the required options are enabled any recent kernel will suffice.
+Cloud Hypervisor also supports direct kernel boot. For x86-64, a `vmlinux` ELF kernel (compiled with PVH support) is needed. In order to support development there is a custom branch; however provided the required options are enabled any recent kernel will suffice.
 
 To build the kernel:
 
 ```shell
 # Clone the Cloud Hypervisor Linux branch
-$ git clone --depth 1 https://github.com/cloud-hypervisor/linux.git -b ch-6.12.8 linux-cloud-hypervisor
+$ git clone --depth 1 https://github.com/cloud-hypervisor/linux.git -b ch-6.2 linux-cloud-hypervisor
 $ pushd linux-cloud-hypervisor
-$ make ch_defconfig
+# Use the x86-64 cloud-hypervisor kernel config to build your kernel for x86-64
+$ wget https://raw.githubusercontent.com/cloud-hypervisor/cloud-hypervisor/main/resources/linux-config-x86_64
+# Use the AArch64 cloud-hypervisor kernel config to build your kernel for AArch64
+$ wget https://raw.githubusercontent.com/cloud-hypervisor/cloud-hypervisor/main/resources/linux-config-aarch64
+$ cp linux-config-x86_64 .config  # x86-64
+$ cp linux-config-aarch64 .config # AArch64
 # Do native build of the x86-64 kernel
 $ KCFLAGS="-Wa,-mx86-used-note=no" make bzImage -j `nproc`
 # Do native build of the AArch64 kernel
@@ -313,9 +302,8 @@ Further details can be found in the [release documentation](docs/releases.md).
 As of 2023-01-03, the following cloud images are supported:
 
 - [Ubuntu Focal](https://cloud-images.ubuntu.com/focal/current/) (focal-server-cloudimg-{amd64,arm64}.img)
-- [Ubuntu Jammy](https://cloud-images.ubuntu.com/jammy/current/) (jammy-server-cloudimg-{amd64,arm64}.img)
-- [Ubuntu Noble](https://cloud-images.ubuntu.com/noble/current/) (noble-server-cloudimg-{amd64,arm64}.img)
-- [Fedora 36](https://archives.fedoraproject.org/pub/archive/fedora/linux/releases/36/Cloud/) ([Fedora-Cloud-Base-36-1.5.x86_64.raw.xz](https://archives.fedoraproject.org/pub/archive/fedora/linux/releases/36/Cloud/x86_64/images/) / [Fedora-Cloud-Base-36-1.5.aarch64.raw.xz](https://archives.fedoraproject.org/pub/archive/fedora/linux/releases/36/Cloud/aarch64/images/))
+- [Ubuntu Jammy](https://cloud-images.ubuntu.com/jammy/current/) (jammy-server-cloudimg-{amd64,arm64}.img )
+- [Fedora 36](https://fedora.mirrorservice.org/fedora/linux/releases/36/Cloud/) ([Fedora-Cloud-Base-36-1.5.x86_64.raw.xz](https://fedora.mirrorservice.org/fedora/linux/releases/36/Cloud/x86_64/images/) / [Fedora-Cloud-Base-36-1.5.aarch64.raw.xz](https://fedora.mirrorservice.org/fedora/linux/releases/36/Cloud/aarch64/images/))
 
 Direct kernel boot to userspace should work with a rootfs from most
 distributions although you may need to enable exotic filesystem types in the

api_client/Cargo.toml

@@ -1,9 +1,8 @@
 [package]
-authors = ["The Cloud Hypervisor Authors"]
-edition.workspace = true
 name = "api_client"
 version = "0.1.0"
+authors = ["The Cloud Hypervisor Authors"]
+edition = "2021"
 
 [dependencies]
-thiserror = { workspace = true }
-vmm-sys-util = { workspace = true }
+vmm-sys-util = "0.12.1"

api_client/src/lib.rs

@@ -3,32 +3,39 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
+use std::fmt;
 use std::io::{Read, Write};
 use std::os::unix::io::RawFd;
-
-use thiserror::Error;
 use vmm_sys_util::sock_ctrl_msg::ScmSocket;
 
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
-    #[error("Error writing to or reading from HTTP socket")]
-    Socket(#[source] std::io::Error),
-    #[error("Error sending file descriptors")]
-    SocketSendFds(#[source] vmm_sys_util::errno::Error),
-    #[error("Error parsing HTTP status code")]
-    StatusCodeParsing(#[source] std::num::ParseIntError),
-    #[error("HTTP output is missing protocol statement")]
+    Socket(std::io::Error),
+    SocketSendFds(vmm_sys_util::errno::Error),
+    StatusCodeParsing(std::num::ParseIntError),
     MissingProtocol,
-    #[error("Error parsing HTTP Content-Length field")]
-    ContentLengthParsing(#[source] std::num::ParseIntError),
-    #[error("Server responded with error {0:?}: {1:?}")]
-    ServerResponse(
-        StatusCode,
-        // TODO: Move `api` module from `vmm` to dedicated crate and use a common type definition
-        Option<
-            String, /* Untyped: Currently Vec<String> of error messages from top to root cause */
-        >,
-    ),
+    ContentLengthParsing(std::num::ParseIntError),
+    ServerResponse(StatusCode, Option<String>),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use Error::*;
+        match self {
+            Socket(e) => write!(f, "Error writing to or reading from HTTP socket: {e}"),
+            SocketSendFds(e) => write!(f, "Error writing to or reading from HTTP socket: {e}"),
+            StatusCodeParsing(e) => write!(f, "Error parsing HTTP status code: {e}"),
+            MissingProtocol => write!(f, "HTTP output is missing protocol statement"),
+            ContentLengthParsing(e) => write!(f, "Error parsing HTTP Content-Length field: {e}"),
+            ServerResponse(s, o) => {
+                if let Some(o) = o {
+                    write!(f, "Server responded with an error: {s:?}: {o}")
+                } else {
+                    write!(f, "Server responded with an error: {s:?}")
+                }
+            }
+        }
+    }
 }
 
 #[derive(Clone, Copy, Debug)]
@@ -38,7 +45,6 @@ pub enum StatusCode {
     NoContent,
     BadRequest,
     NotFound,
-    TooManyRequests,
     InternalServerError,
     NotImplemented,
     Unknown,
@@ -52,7 +58,6 @@ impl StatusCode {
             204 => StatusCode::NoContent,
             400 => StatusCode::BadRequest,
             404 => StatusCode::NotFound,
-            429 => StatusCode::TooManyRequests,
             500 => StatusCode::InternalServerError,
             501 => StatusCode::NotImplemented,
             _ => StatusCode::Unknown,
@@ -118,11 +123,12 @@ fn parse_http_response(socket: &mut dyn Read) -> Result<Option<String>, Error> {
             }
         }
 
-        if let Some(body_offset) = body_offset
-            && let Some(content_length) = content_length
-            && res.len() >= content_length + body_offset
-        {
-            break;
+        if let Some(body_offset) = body_offset {
+            if let Some(content_length) = content_length {
+                if res.len() >= content_length + body_offset {
+                    break;
+                }
+            }
         }
     }
     let body_string = content_length.and(body_offset.map(|o| String::from(&res[o..])));

arch/Cargo.toml

@@ -1,29 +1,30 @@
 [package]
-authors = ["The Chromium OS Authors"]
-edition.workspace = true
 name = "arch"
 version = "0.1.0"
+authors = ["The Chromium OS Authors"]
+edition = "2021"
 
 [features]
 default = []
-fw_cfg = []
-kvm = ["hypervisor/kvm"]
 sev_snp = []
 tdx = []
 
 [dependencies]
-anyhow = { workspace = true }
-byteorder = { workspace = true }
+anyhow = "1.0.75"
+byteorder = "1.4.3"
 hypervisor = { path = "../hypervisor" }
-libc = { workspace = true }
-linux-loader = { workspace = true, features = ["bzimage", "elf", "pe"] }
-log = { workspace = true }
-serde = { workspace = true, features = ["derive", "rc"] }
-thiserror = { workspace = true }
-uuid = { workspace = true }
-vm-memory = { workspace = true, features = ["backend-bitmap", "backend-mmap"] }
-vmm-sys-util = { workspace = true, features = ["with-serde"] }
+libc = "0.2.147"
+linux-loader = { version = "0.11.0", features = ["elf", "bzimage", "pe"] }
+log = "0.4.20"
+serde = { version = "1.0.168", features = ["rc", "derive"] }
+thiserror = "1.0.40"
+uuid = "1.3.4"
+versionize = "0.2.0"
+versionize_derive = "0.1.6"
+vm-memory = { version = "0.14.0", features = ["backend-mmap", "backend-bitmap"] }
+vm-migration = { path = "../vm-migration" }
+vmm-sys-util = { version = "0.12.1", features = ["with-serde"] }
 
-[target.'cfg(any(target_arch = "aarch64", target_arch = "riscv64"))'.dependencies]
-fdt_parser = { version = "0.1.5", package = "fdt" }
-vm-fdt = { workspace = true }
+[target.'cfg(target_arch = "aarch64")'.dependencies]
+fdt_parser = { version = "0.1.4", package = "fdt" }
+vm-fdt = { git = "https://github.com/rust-vmm/vm-fdt", branch = "main" }

arch/src/aarch64/fdt.rs

@@ -6,30 +6,29 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the THIRD-PARTY file.
 
+use crate::{NumaNodes, PciSpaceInfo};
+use byteorder::{BigEndian, ByteOrder};
+use hypervisor::arch::aarch64::gic::Vgic;
+use std::cmp;
 use std::collections::HashMap;
 use std::ffi::CStr;
 use std::fmt::Debug;
-use std::path::Path;
+use std::result;
+use std::str;
 use std::sync::{Arc, Mutex};
-use std::{cmp, fs, result, str};
 
-use byteorder::{BigEndian, ByteOrder};
-use hypervisor::arch::aarch64::gic::Vgic;
-use hypervisor::arch::aarch64::regs::{
-    AARCH64_ARCH_TIMER_HYP_IRQ, AARCH64_ARCH_TIMER_PHYS_NONSECURE_IRQ,
-    AARCH64_ARCH_TIMER_PHYS_SECURE_IRQ, AARCH64_ARCH_TIMER_VIRT_IRQ, AARCH64_PMU_IRQ,
+use super::super::DeviceType;
+use super::super::GuestMemoryMmap;
+use super::super::InitramfsConfig;
+use super::layout::{
+    IRQ_BASE, MEM_32BIT_DEVICES_SIZE, MEM_32BIT_DEVICES_START, MEM_PCI_IO_SIZE, MEM_PCI_IO_START,
+    PCI_HIGH_BASE, PCI_MMIO_CONFIG_SIZE_PER_SEGMENT,
 };
-use thiserror::Error;
+use std::fs;
+use std::path::Path;
 use vm_fdt::{FdtWriter, FdtWriterResult};
 use vm_memory::{Address, Bytes, GuestMemory, GuestMemoryError, GuestMemoryRegion};
 
-use super::super::{DeviceType, GuestMemoryMmap, InitramfsConfig};
-use super::layout::{
-    GIC_V2M_COMPATIBLE, IRQ_BASE, MEM_32BIT_DEVICES_SIZE, MEM_32BIT_DEVICES_START, MEM_PCI_IO_SIZE,
-    MEM_PCI_IO_START, PCI_HIGH_BASE, PCI_MMIO_CONFIG_SIZE_PER_SEGMENT, SPI_BASE, SPI_NUM,
-};
-use crate::{NumaNodes, PciSpaceInfo};
-
 // This is a value for uniquely identifying the FDT node declaring the interrupt controller.
 const GIC_PHANDLE: u32 = 1;
 // This is a value for uniquely identifying the FDT node declaring the MSI controller.
@@ -63,6 +62,9 @@ const GIC_FDT_IRQ_TYPE_PPI: u32 = 1;
 const IRQ_TYPE_EDGE_RISING: u32 = 1;
 const IRQ_TYPE_LEVEL_HI: u32 = 4;
 
+// PMU PPI interrupt number
+pub const AARCH64_PMU_IRQ: u32 = 7;
+
 // Keys and Buttons
 // System Power Down
 const KEY_POWER: u32 = 116;
@@ -78,11 +80,10 @@ pub trait DeviceInfoForFdt {
 }
 
 /// Errors thrown while configuring the Flattened Device Tree for aarch64.
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
     /// Failure in writing FDT in memory.
-    #[error("Failure in writing FDT in memory")]
-    WriteFdtToMemory(#[source] GuestMemoryError),
+    WriteFdtToMemory(GuestMemoryError),
 }
 type Result<T> = result::Result<T, Error>;
 
@@ -110,8 +111,11 @@ pub fn get_cache_size(cache_level: CacheLevel) -> u32 {
 
     let file_path = Path::new(&file_directory);
     if !file_path.exists() {
+        warn!("File: {} does not exist.", file_directory);
         0
     } else {
+        info!("File: {} exist.", file_directory);
+
         let src = fs::read_to_string(file_directory).expect("File not exists or file corrupted.");
         // The content of the file is as simple as a size, like: "32K"
         let src = src.trim();
@@ -141,8 +145,11 @@ pub fn get_cache_coherency_line_size(cache_level: CacheLevel) -> u32 {
 
     let file_path = Path::new(&file_directory);
     if !file_path.exists() {
+        warn!("File: {} does not exist.", file_directory);
         0
     } else {
+        info!("File: {} exist.", file_directory);
+
         let src = fs::read_to_string(file_directory).expect("File not exists or file corrupted.");
         src.trim().parse::<u32>().unwrap()
     }
@@ -161,8 +168,11 @@ pub fn get_cache_number_of_sets(cache_level: CacheLevel) -> u32 {
 
     let file_path = Path::new(&file_directory);
     if !file_path.exists() {
+        warn!("File: {} does not exist.", file_directory);
         0
     } else {
+        info!("File: {} exist.", file_directory);
+
         let src = fs::read_to_string(file_directory).expect("File not exists or file corrupted.");
         src.trim().parse::<u32>().unwrap()
     }
@@ -186,8 +196,11 @@ pub fn get_cache_shared(cache_level: CacheLevel) -> bool {
 
     let file_path = Path::new(&file_directory);
     if !file_path.exists() {
+        warn!("File: {} does not exist.", file_directory);
         result = false;
     } else {
+        info!("File: {} exist.", file_directory);
+
         let src = fs::read_to_string(file_directory).expect("File not exists or file corrupted.");
         let src = src.trim();
         if src.is_empty() {
@@ -206,7 +219,7 @@ pub fn create_fdt<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::BuildHash
     guest_mem: &GuestMemoryMmap,
     cmdline: &str,
     vcpu_mpidr: Vec<u64>,
-    vcpu_topology: Option<(u16, u16, u16, u16)>,
+    vcpu_topology: Option<(u8, u8, u8)>,
     device_info: &HashMap<(DeviceType, String), T, S>,
     gic_device: &Arc<Mutex<dyn Vgic>>,
     initrd: &Option<InitramfsConfig>,
@@ -219,8 +232,8 @@ pub fn create_fdt<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::BuildHash
     let mut fdt = FdtWriter::new().unwrap();
 
     // For an explanation why these nodes were introduced in the blob take a look at
-    // the "Device Node Requirements" chapter of the Devicetree Specification.
-    // https://www.devicetree.org/specifications/
+    // https://github.com/torvalds/linux/blob/master/Documentation/devicetree/booting-without-of.txt#L845
+    // Look for "Required nodes and properties".
 
     // Header or the root node as per above mentioned documentation.
     let root_node = fdt.begin_node("")?;
@@ -268,7 +281,7 @@ pub fn write_fdt_to_memory(fdt_final: Vec<u8>, guest_mem: &GuestMemoryMmap) -> R
 fn create_cpu_nodes(
     fdt: &mut FdtWriter,
     vcpu_mpidr: &[u64],
-    vcpu_topology: Option<(u16, u16, u16, u16)>,
+    vcpu_topology: Option<(u8, u8, u8)>,
     numa_nodes: &NumaNodes,
 ) -> FdtWriterResult<()> {
     // See https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/arm/cpus.yaml.
@@ -277,11 +290,8 @@ fn create_cpu_nodes(
     fdt.property_u32("#size-cells", 0x0)?;
 
     let num_cpus = vcpu_mpidr.len();
-    let (threads_per_core, cores_per_die, dies_per_package, packages) =
-        vcpu_topology.unwrap_or((1, 1, 1, 1));
-    let cores_per_package = cores_per_die * dies_per_package;
-    let max_cpus: u32 =
-        threads_per_core as u32 * cores_per_die as u32 * dies_per_package as u32 * packages as u32;
+    let (threads_per_core, cores_per_package, packages) = vcpu_topology.unwrap_or((1, 1, 1));
+    let max_cpus: u32 = (threads_per_core * cores_per_package * packages).into();
 
     // Add cache info.
     // L1 Data Cache Info.
@@ -313,6 +323,7 @@ fn create_cpu_nodes(
     if !cache_exist {
         warn!("cache sysfs system does not exist.");
     } else {
+        info!("cache sysfs system exists.");
         // L1 Data Cache Info.
         l1_d_cache_size = get_cache_size(CacheLevel::L1D);
         l1_d_cache_line_size = get_cache_coherency_line_size(CacheLevel::L1D);
@@ -360,7 +371,7 @@ fn create_cpu_nodes(
         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 u32)) {
+                if numa_node.unwrap().cpus.contains(&(cpu_id as u8)) {
                     fdt.property_u32("numa-node-id", numa_node_idx as u32)?;
                 }
             }
@@ -413,6 +424,9 @@ fn create_cpu_nodes(
 
                 fdt.end_node(l2_cache_node)?;
             }
+            if l2_cache_size != 0 && l2_cache_shared {
+                warn!("L2 cache shared with other cpus");
+            }
         }
 
         fdt.end_node(cpu_node)?;
@@ -449,8 +463,7 @@ fn create_cpu_nodes(
     }
 
     if let Some(topology) = vcpu_topology {
-        let (threads_per_core, cores_per_die, dies_per_package, packages) = topology;
-        let cores_per_package = cores_per_die * dies_per_package;
+        let (threads_per_core, cores_per_package, packages) = topology;
         let cpu_map_node = fdt.begin_node("cpu-map")?;
 
         // Create device tree nodes with regard of above mapping.
@@ -510,7 +523,7 @@ fn create_memory_node(
                 let memory_region_size: u64 = memory_region.size() as u64;
                 mem_reg_prop.push(memory_region_start_addr);
                 mem_reg_prop.push(memory_region_size);
-                // Set the node address the first non-zero region address
+                // Set the node address the first non-zero regison address
                 if node_memory_addr == 0 {
                     node_memory_addr = memory_region_start_addr;
                 }
@@ -556,7 +569,7 @@ fn create_memory_node(
 
         if ram_regions.len() > 2 {
             panic!(
-                "There should be up to two non-continuous regions, divided by the
+                "There should be up to two non-continuous regions, devidided by the
                     gap at the end of 32bit address space."
             );
         }
@@ -574,14 +587,15 @@ fn create_memory_node(
                 && (first_region_end <= &mem_32bit_reserved_start))
             {
                 panic!(
-                    "Unexpected first memory region layout: (start: 0x{first_region_start:08x}, end: 0x{first_region_end:08x}).
-                    ram_start: 0x{ram_start:08x}, mem_32bit_reserved_start: 0x{mem_32bit_reserved_start:08x}"
+                    "Unexpected first memory region layout: (start: 0x{:08x}, end: 0x{:08x}).
+                    ram_start: 0x{:08x}, mem_32bit_reserved_start: 0x{:08x}",
+                    first_region_start, first_region_end, ram_start, mem_32bit_reserved_start
                 );
             }
 
             let mem_size = first_region_end - ram_start;
             let mem_reg_prop = [ram_start, mem_size];
-            let memory_node_name = format!("memory@{ram_start:x}");
+            let memory_node_name = format!("memory@{:x}", ram_start);
             let memory_node = fdt.begin_node(&memory_node_name)?;
             fdt.property_string("device_type", "memory")?;
             fdt.property_array_u64("reg", &mem_reg_prop)?;
@@ -594,13 +608,14 @@ fn create_memory_node(
 
             if second_region_start != &ram_64bit_start {
                 panic!(
-                    "Unexpected second memory region layout: start: 0x{second_region_start:08x}, ram_64bit_start: 0x{ram_64bit_start:08x}"
+                    "Unexpected second memory region layout: start: 0x{:08x}, ram_64bit_start: 0x{:08x}",
+                    second_region_start, ram_64bit_start
                 );
             }
 
             let mem_size = second_region_end - ram_64bit_start;
             let mem_reg_prop = [ram_64bit_start, mem_size];
-            let memory_node_name = format!("memory@{ram_64bit_start:x}");
+            let memory_node_name = format!("memory@{:x}", ram_64bit_start);
             let memory_node = fdt.begin_node(&memory_node_name)?;
             fdt.property_string("device_type", "memory")?;
             fdt.property_array_u64("reg", &mem_reg_prop)?;
@@ -657,19 +672,11 @@ fn create_gic_node(fdt: &mut FdtWriter, gic_device: &Arc<Mutex<dyn Vgic>>) -> Fd
 
     if gic_device.lock().unwrap().msi_compatible() {
         let msic_node = fdt.begin_node("msic")?;
-        let msi_compatibility = gic_device.lock().unwrap().msi_compatibility().to_string();
-
-        fdt.property_string("compatible", msi_compatibility.as_str())?;
+        fdt.property_string("compatible", gic_device.lock().unwrap().msi_compatibility())?;
         fdt.property_null("msi-controller")?;
         fdt.property_u32("phandle", MSI_PHANDLE)?;
         let msi_reg_prop = gic_device.lock().unwrap().msi_properties();
         fdt.property_array_u64("reg", &msi_reg_prop)?;
-
-        if msi_compatibility == GIC_V2M_COMPATIBLE {
-            fdt.property_u32("arm,msi-base-spi", SPI_BASE)?;
-            fdt.property_u32("arm,msi-num-spis", SPI_NUM)?;
-        }
-
         fdt.end_node(msic_node)?;
     }
 
@@ -696,14 +703,9 @@ fn create_clock_node(fdt: &mut FdtWriter) -> FdtWriterResult<()> {
 
 fn create_timer_node(fdt: &mut FdtWriter) -> FdtWriterResult<()> {
     // See
-    // https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/timer/arm%2Carch_timer.yaml
+    // https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/interrupt-controller/arch_timer.txt
     // These are fixed interrupt numbers for the timer device.
-    let irqs = [
-        AARCH64_ARCH_TIMER_PHYS_SECURE_IRQ,
-        AARCH64_ARCH_TIMER_PHYS_NONSECURE_IRQ,
-        AARCH64_ARCH_TIMER_VIRT_IRQ,
-        AARCH64_ARCH_TIMER_HYP_IRQ,
-    ];
+    let irqs = [13, 14, 11, 10];
     let compatible = "arm,armv8-timer";
 
     let mut timer_reg_cells: Vec<u32> = Vec::new();
@@ -838,21 +840,6 @@ fn create_gpio_node<T: DeviceInfoForFdt + Clone + Debug>(
     Ok(())
 }
 
-// https://www.kernel.org/doc/Documentation/devicetree/bindings/arm/fw-cfg.txt
-#[cfg(feature = "fw_cfg")]
-fn create_fw_cfg_node<T: DeviceInfoForFdt + Clone + Debug>(
-    fdt: &mut FdtWriter,
-    dev_info: &T,
-) -> FdtWriterResult<()> {
-    // FwCfg node
-    let fw_cfg_node = fdt.begin_node(&format!("fw-cfg@{:x}", dev_info.addr()))?;
-    fdt.property("compatible", b"qemu,fw-cfg-mmio\0")?;
-    fdt.property_array_u64("reg", &[dev_info.addr(), dev_info.length()])?;
-    fdt.end_node(fw_cfg_node)?;
-
-    Ok(())
-}
-
 fn create_devices_node<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::BuildHasher>(
     fdt: &mut FdtWriter,
     dev_info: &HashMap<(DeviceType, String), T, S>,
@@ -868,8 +855,6 @@ fn create_devices_node<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::Buil
             DeviceType::Virtio(_) => {
                 ordered_virtio_device.push(info);
             }
-            #[cfg(feature = "fw_cfg")]
-            DeviceType::FwCfg => create_fw_cfg_node(fdt, info)?,
         }
     }
 
@@ -909,7 +894,7 @@ fn create_pci_nodes(
     for pci_device_info_elem in pci_device_info.iter() {
         // EDK2 requires the PCIe high space above 4G address.
         // The actual space in CLH follows the RAM. If the RAM space is small, the PCIe high space
-        // could fall below 4G.
+        // could fall bellow 4G.
         // Here we cut off PCI device space below 8G in FDT to workaround the EDK2 check.
         // But the address written in ACPI is not impacted.
         let (pci_device_base_64bit, pci_device_size_64bit) =
@@ -999,39 +984,39 @@ fn create_pci_nodes(
         fdt.property_array_u32("msi-map", &msi_map)?;
         fdt.property_u32("msi-parent", MSI_PHANDLE)?;
 
-        if pci_device_info_elem.pci_segment_id == 0
-            && 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)?;
+        if pci_device_info_elem.pci_segment_id == 0 {
+            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@{virtio_iommu_bdf:x}");
-            let virtio_iommu_node = fdt.begin_node(&virtio_iommu_node_name)?;
-            fdt.property_u32("#iommu-cells", 1)?;
-            fdt.property_string("compatible", "virtio,pci-iommu")?;
+                // See kernel document Documentation/devicetree/bindings/virtio/iommu.txt
+                // for virtio-iommu node settings.
+                let virtio_iommu_node_name = format!("virtio_iommu@{virtio_iommu_bdf:x}");
+                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)?;
+                // '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(virtio_iommu_node)?;
+            }
         }
 
         fdt.end_node(pci_node)?;
@@ -1126,7 +1111,10 @@ fn print_node(node: fdt_parser::node::FdtNode<'_, '_>, n_spaces: usize) {
         //   - At first, try to convert it to CStr and print,
         //   - If failed, print it as u32 array.
         let value_result = match CStr::from_bytes_with_nul(value) {
-            Ok(value_cstr) => value_cstr.to_str().ok(),
+            Ok(value_cstr) => match value_cstr.to_str() {
+                Ok(value_str) => Some(value_str),
+                Err(_e) => None,
+            },
             Err(_e) => None,
         };
 

arch/src/aarch64/layout.rs

@@ -111,9 +111,8 @@ pub const RAM_64BIT_START: GuestAddress = GuestAddress(0x1_0000_0000);
 pub const CMDLINE_MAX_SIZE: usize = 2048;
 
 /// FDT is at the beginning of RAM.
+/// Maximum size of the device tree blob as specified in https://www.kernel.org/doc/Documentation/arm64/booting.txt.
 pub const FDT_START: GuestAddress = RAM_START;
-/// Maximum size of the device tree blob as specified in [the kernel
-/// documentation](https://www.kernel.org/doc/Documentation/arm64/booting.txt).
 pub const FDT_MAX_SIZE: u64 = 0x20_0000;
 
 /// Put ACPI table above dtb
@@ -138,12 +137,3 @@ pub const IRQ_BASE: u32 = 32;
 
 /// Number of supported interrupts
 pub const IRQ_NUM: u32 = 256;
-
-/// Base SPI interrupt number
-pub const SPI_BASE: u32 = 32;
-
-/// Total number of SPIs
-pub const SPI_NUM: u32 = 64;
-
-/// GICv2M compatible string
-pub const GIC_V2M_COMPATIBLE: &str = "arm,gic-v2m-frame";

arch/src/aarch64/mod.rs

@@ -6,56 +6,54 @@
 pub mod fdt;
 /// Layout for this aarch64 system.
 pub mod layout;
+/// Module for system registers definition
+pub mod regs;
 /// Module for loading UEFI binary.
 pub mod uefi;
 
-use std::collections::HashMap;
-use std::fmt::Debug;
-use std::sync::{Arc, Mutex};
-
-use hypervisor::arch::aarch64::gic::Vgic;
-use hypervisor::arch::aarch64::regs::MPIDR_EL1;
-use log::{Level, log_enabled};
-use thiserror::Error;
-use vm_memory::{Address, GuestAddress, GuestMemory, GuestMemoryAtomic};
-
 pub use self::fdt::DeviceInfoForFdt;
 use crate::{DeviceType, GuestMemoryMmap, NumaNodes, PciSpaceInfo, RegionType};
+use hypervisor::arch::aarch64::gic::Vgic;
+use log::{log_enabled, Level};
+use std::collections::HashMap;
+use std::convert::TryInto;
+use std::fmt::Debug;
+use std::sync::{Arc, Mutex};
+use vm_memory::{Address, GuestAddress, GuestMemory, GuestMemoryAtomic};
 
 pub const _NSIG: i32 = 65;
 
 /// Errors thrown while configuring aarch64 system.
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
     /// Failed to create a FDT.
-    #[error("Failed to create a FDT")]
     SetupFdt,
 
     /// Failed to write FDT to memory.
-    #[error("Failed to write FDT to memory")]
-    WriteFdtToMemory(#[source] fdt::Error),
+    WriteFdtToMemory(fdt::Error),
 
     /// Failed to create a GIC.
-    #[error("Failed to create a GIC")]
     SetupGic,
 
     /// Failed to compute the initramfs address.
-    #[error("Failed to compute the initramfs address")]
     InitramfsAddress,
 
     /// Error configuring the general purpose registers
-    #[error("Error configuring the general purpose registers")]
-    RegsConfiguration(#[source] hypervisor::HypervisorCpuError),
+    RegsConfiguration(hypervisor::HypervisorCpuError),
 
     /// Error configuring the MPIDR register
-    #[error("Error configuring the MPIDR register")]
-    VcpuRegMpidr(#[source] hypervisor::HypervisorCpuError),
+    VcpuRegMpidr(hypervisor::HypervisorCpuError),
 
     /// Error initializing PMU for vcpu
-    #[error("Error initializing PMU for vcpu")]
     VcpuInitPmu,
 }
 
+impl From<Error> for super::Error {
+    fn from(e: Error) -> super::Error {
+        super::Error::PlatformSpecific(e)
+    }
+}
+
 #[derive(Debug, Copy, Clone)]
 /// Specifies the entry point address where the guest must start
 /// executing code.
@@ -67,7 +65,7 @@ pub struct EntryPoint {
 /// Configure the specified VCPU, and return its MPIDR.
 pub fn configure_vcpu(
     vcpu: &Arc<dyn hypervisor::Vcpu>,
-    id: u32,
+    id: u8,
     boot_setup: Option<(EntryPoint, &GuestMemoryAtomic<GuestMemoryMmap>)>,
 ) -> super::Result<u64> {
     if let Some((kernel_entry_point, _guest_memory)) = boot_setup {
@@ -79,7 +77,9 @@ pub fn configure_vcpu(
         .map_err(Error::RegsConfiguration)?;
     }
 
-    let mpidr = vcpu.get_sys_reg(MPIDR_EL1).map_err(Error::VcpuRegMpidr)?;
+    let mpidr = vcpu
+        .get_sys_reg(regs::MPIDR_EL1)
+        .map_err(Error::VcpuRegMpidr)?;
     Ok(mpidr)
 }
 
@@ -126,7 +126,7 @@ pub fn configure_system<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::Bui
     guest_mem: &GuestMemoryMmap,
     cmdline: &str,
     vcpu_mpidr: Vec<u64>,
-    vcpu_topology: Option<(u16, u16, u16, u16)>,
+    vcpu_topology: Option<(u8, u8, u8)>,
     device_info: &HashMap<(DeviceType, String), T, S>,
     initrd: &Option<super::InitramfsConfig>,
     pci_space_info: &[PciSpaceInfo],

arch/src/aarch64/regs.rs

@@ -0,0 +1,43 @@
+// Copyright 2022 Arm Limited (or its affiliates). All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+// AArch64 system register encoding:
+// See https://developer.arm.com/documentation/ddi0487 (chapter D12)
+//
+//   31      22  21 20 19 18 16 15 12 11  8 7   5 4  0
+//  +----------+---+-----+-----+-----+-----+-----+----+
+//  |1101010100| L | op0 | op1 | CRn | CRm | op2 | Rt |
+//  +----------+---+-----+-----+-----+-----+-----+----+
+//
+// Notes:
+// - L and Rt are reserved as implementation defined fields, ignored.
+
+const SYSREG_HEAD: u32 = 0b1101010100u32 << 22;
+const SYSREG_OP0_SHIFT: u32 = 19;
+const SYSREG_OP0_MASK: u32 = 0b11u32 << 19;
+const SYSREG_OP1_SHIFT: u32 = 16;
+const SYSREG_OP1_MASK: u32 = 0b111u32 << 16;
+const SYSREG_CRN_SHIFT: u32 = 12;
+const SYSREG_CRN_MASK: u32 = 0b1111u32 << 12;
+const SYSREG_CRM_SHIFT: u32 = 8;
+const SYSREG_CRM_MASK: u32 = 0b1111u32 << 8;
+const SYSREG_OP2_SHIFT: u32 = 5;
+const SYSREG_OP2_MASK: u32 = 0b111u32 << 5;
+
+/// Define the ID of system registers
+#[macro_export]
+macro_rules! arm64_sys_reg {
+    ($name: tt, $op0: tt, $op1: tt, $crn: tt, $crm: tt, $op2: tt) => {
+        pub const $name: u32 = SYSREG_HEAD
+            | ((($op0 as u32) << SYSREG_OP0_SHIFT) & SYSREG_OP0_MASK as u32)
+            | ((($op1 as u32) << SYSREG_OP1_SHIFT) & SYSREG_OP1_MASK as u32)
+            | ((($crn as u32) << SYSREG_CRN_SHIFT) & SYSREG_CRN_MASK as u32)
+            | ((($crm as u32) << SYSREG_CRM_SHIFT) & SYSREG_CRM_MASK as u32)
+            | ((($op2 as u32) << SYSREG_OP2_SHIFT) & SYSREG_OP2_MASK as u32);
+    };
+}
+
+arm64_sys_reg!(MPIDR_EL1, 3, 0, 0, 0, 5);
+arm64_sys_reg!(ID_AA64MMFR0_EL1, 3, 0, 0, 7, 0);
+arm64_sys_reg!(TTBR1_EL1, 3, 0, 2, 0, 1);
+arm64_sys_reg!(TCR_EL1, 3, 0, 2, 0, 2);

arch/src/aarch64/uefi.rs

@@ -1,28 +1,20 @@
 // Copyright 2020 Arm Limited (or its affiliates). All rights reserved.
-//
-// SPDX-License-Identifier: Apache-2.0
 
 use std::io::{Read, Seek, SeekFrom};
 use std::os::fd::AsFd;
 use std::result;
-
-use thiserror::Error;
 use vm_memory::{GuestAddress, GuestMemory};
 
 /// Errors thrown while loading UEFI binary
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
     /// Unable to seek to UEFI image start.
-    #[error("Unable to seek to UEFI image start")]
     SeekUefiStart,
     /// Unable to seek to UEFI image end.
-    #[error("Unable to seek to UEFI image end")]
     SeekUefiEnd,
     /// UEFI image too big.
-    #[error("UEFI image too big")]
     UefiTooBig,
     /// Unable to read UEFI image
-    #[error("Unable to read UEFI image")]
     ReadUefiImage,
 }
 type Result<T> = result::Result<T, Error>;

arch/src/lib.rs

@@ -1,4 +1,3 @@
-// Copyright © 2024 Institute of Software, CAS. All rights reserved.
 // Copyright 2020 Arm Limited (or its affiliates). All rights reserved.
 // Copyright © 2020, Oracle and/or its affiliates.
 //
@@ -6,17 +5,22 @@
 // SPDX-License-Identifier: Apache-2.0
 
 //! Implements platform specific functionality.
-//! Supported platforms: x86_64, aarch64, riscv64.
+//! Supported platforms: x86_64, aarch64.
 
 #[macro_use]
 extern crate log;
 
-use std::collections::BTreeMap;
-use std::sync::Arc;
-use std::{fmt, result};
-
+#[cfg(target_arch = "x86_64")]
+use crate::x86_64::SgxEpcSection;
 use serde::{Deserialize, Serialize};
+use std::collections::BTreeMap;
+use std::fmt;
+use std::result;
+use std::sync::Arc;
 use thiserror::Error;
+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>;
@@ -25,14 +29,11 @@ type GuestRegionMmap = vm_memory::GuestRegionMmap<vm_memory::bitmap::AtomicBitma
 #[derive(Debug, Error)]
 pub enum Error {
     #[cfg(target_arch = "x86_64")]
-    #[error("Platform specific error (x86_64)")]
-    PlatformSpecific(#[from] x86_64::Error),
+    #[error("Platform specific error (x86_64): {0:?}")]
+    PlatformSpecific(x86_64::Error),
     #[cfg(target_arch = "aarch64")]
-    #[error("Platform specific error (aarch64)")]
-    PlatformSpecific(#[from] aarch64::Error),
-    #[cfg(target_arch = "riscv64")]
-    #[error("Platform specific error (riscv64)")]
-    PlatformSpecific(#[from] riscv64::Error),
+    #[error("Platform specific error (aarch64): {0:?}")]
+    PlatformSpecific(aarch64::Error),
     #[error("The memory map table extends past the end of guest memory")]
     MemmapTablePastRamEnd,
     #[error("Error writing memory map table to guest memory")]
@@ -43,21 +44,17 @@ pub enum Error {
     StartInfoSetup,
     #[error("Failed to compute initramfs address")]
     InitramfsAddress,
-    #[error("Error writing module entry to guest memory")]
+    #[error("Error writing module entry to guest memory: {0}")]
     ModlistSetup(#[source] vm_memory::GuestMemoryError),
     #[error("RSDP extends past the end of guest memory")]
     RsdpPastRamEnd,
-    #[error("Failed to setup Zero Page for bzImage")]
-    ZeroPageSetup(#[source] vm_memory::GuestMemoryError),
-    #[error("Zero Page for bzImage past RAM end")]
-    ZeroPagePastRamEnd,
 }
 
 /// Type for returning public functions outcome.
 pub type Result<T> = result::Result<T, Error>;
 
 /// Type for memory region types.
-#[derive(Clone, Copy, PartialEq, Eq, Debug, Serialize, Deserialize)]
+#[derive(Clone, Copy, PartialEq, Eq, Debug, Serialize, Deserialize, Versionize)]
 pub enum RegionType {
     /// RAM type
     Ram,
@@ -75,26 +72,17 @@ pub enum RegionType {
     Reserved,
 }
 
+impl VersionMapped for RegionType {}
+
 /// Module for aarch64 related functionality.
 #[cfg(target_arch = "aarch64")]
 pub mod aarch64;
 
 #[cfg(target_arch = "aarch64")]
 pub use aarch64::{
-    _NSIG, EntryPoint, arch_memory_regions, configure_system, configure_vcpu,
-    fdt::DeviceInfoForFdt, get_host_cpu_phys_bits, initramfs_load_addr, layout,
-    layout::CMDLINE_MAX_SIZE, layout::IRQ_BASE, uefi,
-};
-
-/// Module for riscv64 related functionality.
-#[cfg(target_arch = "riscv64")]
-pub mod riscv64;
-
-#[cfg(target_arch = "riscv64")]
-pub use riscv64::{
-    _NSIG, EntryPoint, arch_memory_regions, configure_system, configure_vcpu,
-    fdt::DeviceInfoForFdt, get_host_cpu_phys_bits, initramfs_load_addr, layout,
-    layout::CMDLINE_MAX_SIZE, layout::IRQ_BASE, uefi,
+    arch_memory_regions, configure_system, configure_vcpu, fdt::DeviceInfoForFdt,
+    get_host_cpu_phys_bits, initramfs_load_addr, layout, layout::CMDLINE_MAX_SIZE,
+    layout::IRQ_BASE, uefi, EntryPoint, _NSIG,
 };
 
 #[cfg(target_arch = "x86_64")]
@@ -102,9 +90,10 @@ pub mod x86_64;
 
 #[cfg(target_arch = "x86_64")]
 pub use x86_64::{
-    _NSIG, CpuidConfig, CpuidFeatureEntry, EntryPoint, arch_memory_regions, configure_system,
-    configure_vcpu, generate_common_cpuid, generate_ram_ranges, get_host_cpu_phys_bits,
-    initramfs_load_addr, layout, layout::CMDLINE_MAX_SIZE, layout::CMDLINE_START, regs,
+    arch_memory_regions, configure_system, configure_vcpu, generate_common_cpuid,
+    generate_ram_ranges, get_host_cpu_phys_bits, initramfs_load_addr, layout,
+    layout::CMDLINE_MAX_SIZE, layout::CMDLINE_START, regs, CpuidConfig, CpuidFeatureEntry,
+    EntryPoint, _NSIG,
 };
 
 /// Safe wrapper for `sysconf(_SC_PAGESIZE)`.
@@ -119,10 +108,12 @@ fn pagesize() -> usize {
 pub struct NumaNode {
     pub memory_regions: Vec<Arc<GuestRegionMmap>>,
     pub hotplug_regions: Vec<Arc<GuestRegionMmap>>,
-    pub cpus: Vec<u32>,
+    pub cpus: Vec<u8>,
     pub pci_segments: Vec<u16>,
     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>;
@@ -141,7 +132,7 @@ pub enum DeviceType {
     /// Device Type: Virtio.
     Virtio(u32),
     /// Device Type: Serial.
-    #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+    #[cfg(target_arch = "aarch64")]
     Serial,
     /// Device Type: RTC.
     #[cfg(target_arch = "aarch64")]
@@ -149,9 +140,6 @@ pub enum DeviceType {
     /// Device Type: GPIO.
     #[cfg(target_arch = "aarch64")]
     Gpio,
-    /// Device Type: fw_cfg.
-    #[cfg(feature = "fw_cfg")]
-    FwCfg,
 }
 
 /// Default (smallest) memory page size for the supported architectures.
@@ -165,7 +153,7 @@ impl fmt::Display for DeviceType {
 
 /// Structure to describe MMIO device information
 #[derive(Clone, Debug)]
-#[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+#[cfg(target_arch = "aarch64")]
 pub struct MmioDeviceInfo {
     pub addr: u64,
     pub len: u64,
@@ -174,7 +162,7 @@ pub struct MmioDeviceInfo {
 
 /// Structure to describe PCI space information
 #[derive(Clone, Debug)]
-#[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+#[cfg(target_arch = "aarch64")]
 pub struct PciSpaceInfo {
     pub pci_segment_id: u16,
     pub mmio_config_address: u64,
@@ -182,7 +170,7 @@ pub struct PciSpaceInfo {
     pub pci_device_space_size: u64,
 }
 
-#[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+#[cfg(target_arch = "aarch64")]
 impl DeviceInfoForFdt for MmioDeviceInfo {
     fn addr(&self) -> u64 {
         self.addr

arch/src/riscv64/fdt.rs

@@ -1,481 +0,0 @@
-// Copyright © 2024 Institute of Software, CAS. All rights reserved.
-// Copyright 2020 Arm Limited (or its affiliates). All rights reserved.
-// Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0
-//
-// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the THIRD-PARTY file.
-
-use std::collections::HashMap;
-use std::ffi::CStr;
-use std::fmt::Debug;
-use std::sync::{Arc, Mutex};
-use std::{cmp, result, str};
-
-use byteorder::{BigEndian, ByteOrder};
-use hypervisor::arch::riscv64::aia::Vaia;
-use thiserror::Error;
-use vm_fdt::{FdtWriter, FdtWriterResult};
-use vm_memory::{Address, Bytes, GuestMemory, GuestMemoryError, GuestMemoryRegion};
-
-use super::super::{DeviceType, GuestMemoryMmap, InitramfsConfig};
-use super::layout::{
-    IRQ_BASE, MEM_32BIT_DEVICES_SIZE, MEM_32BIT_DEVICES_START, MEM_PCI_IO_SIZE, MEM_PCI_IO_START,
-    PCI_HIGH_BASE, PCI_MMIO_CONFIG_SIZE_PER_SEGMENT,
-};
-use crate::PciSpaceInfo;
-
-const AIA_APLIC_PHANDLE: u32 = 1;
-const AIA_IMSIC_PHANDLE: u32 = 2;
-const CPU_INTC_BASE_PHANDLE: u32 = 3;
-const CPU_BASE_PHANDLE: u32 = 256 + CPU_INTC_BASE_PHANDLE;
-// Read the documentation specified when appending the root node to the FDT.
-const ADDRESS_CELLS: u32 = 0x2;
-const SIZE_CELLS: u32 = 0x2;
-
-// From https://elixir.bootlin.com/linux/v6.10/source/include/dt-bindings/interrupt-controller/irq.h#L14
-const _IRQ_TYPE_EDGE_RISING: u32 = 1;
-const IRQ_TYPE_LEVEL_HI: u32 = 4;
-
-const S_MODE_EXT_IRQ: u32 = 9;
-
-/// Trait for devices to be added to the Flattened Device Tree.
-pub trait DeviceInfoForFdt {
-    /// Returns the address where this device will be loaded.
-    fn addr(&self) -> u64;
-    /// Returns the associated interrupt for this device.
-    fn irq(&self) -> u32;
-    /// Returns the amount of memory that needs to be reserved for this device.
-    fn length(&self) -> u64;
-}
-
-/// Errors thrown while configuring the Flattened Device Tree for riscv64.
-#[derive(Debug, Error)]
-pub enum Error {
-    /// Failure in writing FDT in memory.
-    #[error("Failure in writing FDT in memory")]
-    WriteFdtToMemory(#[source] GuestMemoryError),
-}
-type Result<T> = result::Result<T, Error>;
-
-/// Creates the flattened device tree for this riscv64 VM.
-#[allow(clippy::too_many_arguments)]
-pub fn create_fdt<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::BuildHasher>(
-    guest_mem: &GuestMemoryMmap,
-    cmdline: &str,
-    num_vcpu: u32,
-    device_info: &HashMap<(DeviceType, String), T, S>,
-    aia_device: &Arc<Mutex<dyn Vaia>>,
-    initrd: &Option<InitramfsConfig>,
-    pci_space_info: &[PciSpaceInfo],
-) -> FdtWriterResult<Vec<u8>> {
-    // Allocate stuff necessary for the holding the blob.
-    let mut fdt = FdtWriter::new()?;
-
-    // For an explanation why these nodes were introduced in the blob take a look at
-    // https://github.com/devicetree-org/devicetree-specification/releases/tag/v0.4
-    // In chapter 3.
-
-    // Header or the root node as per above mentioned documentation.
-    let root_node = fdt.begin_node("")?;
-    fdt.property_string("compatible", "linux,dummy-virt")?;
-    // For info on #address-cells and size-cells resort to Table 3.1 Root Node
-    // Properties
-    fdt.property_u32("#address-cells", ADDRESS_CELLS)?;
-    fdt.property_u32("#size-cells", SIZE_CELLS)?;
-    create_cpu_nodes(&mut fdt, num_vcpu)?;
-    create_memory_node(&mut fdt, guest_mem)?;
-    create_chosen_node(&mut fdt, cmdline, initrd)?;
-    create_aia_node(&mut fdt, aia_device)?;
-    create_devices_node(&mut fdt, device_info)?;
-    create_pci_nodes(&mut fdt, pci_space_info)?;
-
-    // End Header node.
-    fdt.end_node(root_node)?;
-
-    let fdt_final = fdt.finish()?;
-
-    Ok(fdt_final)
-}
-
-pub fn write_fdt_to_memory(fdt_final: Vec<u8>, guest_mem: &GuestMemoryMmap) -> Result<()> {
-    // Write FDT to memory.
-    guest_mem
-        .write_slice(fdt_final.as_slice(), super::layout::FDT_START)
-        .map_err(Error::WriteFdtToMemory)?;
-    Ok(())
-}
-
-// Following are the auxiliary function for creating the different nodes that we append to our FDT.
-fn create_cpu_nodes(fdt: &mut FdtWriter, num_cpus: u32) -> FdtWriterResult<()> {
-    // See https://elixir.bootlin.com/linux/v6.10/source/Documentation/devicetree/bindings/riscv/cpus.yaml
-    let cpus = fdt.begin_node("cpus")?;
-    // As per documentation, on RISC-V 64-bit systems value should be set to 1.
-    fdt.property_u32("#address-cells", 0x01)?;
-    fdt.property_u32("#size-cells", 0x0)?;
-    // TODO: Retrieve CPU frequency from cpu timer regs
-    let timebase_frequency: u32 = 0x989680;
-    fdt.property_u32("timebase-frequency", timebase_frequency)?;
-
-    for cpu_index in 0..num_cpus {
-        let cpu = fdt.begin_node(&format!("cpu@{cpu_index:x}"))?;
-        fdt.property_string("device_type", "cpu")?;
-        fdt.property_string("compatible", "riscv")?;
-        fdt.property_string("mmu-type", "sv48")?;
-        fdt.property_string("riscv,isa", "rv64imafdc_smaia_ssaia")?;
-        fdt.property_string("status", "okay")?;
-        fdt.property_u32("reg", cpu_index)?;
-        fdt.property_u32("phandle", CPU_BASE_PHANDLE + cpu_index)?;
-
-        // interrupt controller node
-        let intc_node = fdt.begin_node("interrupt-controller")?;
-        fdt.property_string("compatible", "riscv,cpu-intc")?;
-        fdt.property_u32("#interrupt-cells", 1u32)?;
-        fdt.property_null("interrupt-controller")?;
-        fdt.property_u32("phandle", CPU_INTC_BASE_PHANDLE + cpu_index)?;
-        fdt.end_node(intc_node)?;
-
-        fdt.end_node(cpu)?;
-    }
-
-    fdt.end_node(cpus)?;
-
-    Ok(())
-}
-
-fn create_memory_node(fdt: &mut FdtWriter, guest_mem: &GuestMemoryMmap) -> FdtWriterResult<()> {
-    // Note: memory regions from "GuestMemory" are sorted and non-zero sized.
-    let ram_regions = {
-        let mut ram_regions = Vec::new();
-        let mut current_start = guest_mem
-            .iter()
-            .next()
-            .map(GuestMemoryRegion::start_addr)
-            .expect("GuestMemory must have one memory region at least")
-            .raw_value();
-        let mut current_end = current_start;
-
-        for (start, size) in guest_mem
-            .iter()
-            .map(|m| (m.start_addr().raw_value(), m.len()))
-        {
-            if current_end == start {
-                // This zone is continuous with the previous one.
-                current_end += size;
-            } else {
-                ram_regions.push((current_start, current_end));
-
-                current_start = start;
-                current_end = start + size;
-            }
-        }
-
-        ram_regions.push((current_start, current_end));
-
-        ram_regions
-    };
-
-    let mut mem_reg_property = Vec::new();
-    for region in ram_regions {
-        let mem_size = region.1 - region.0;
-        mem_reg_property.push(region.0);
-        mem_reg_property.push(mem_size);
-    }
-
-    let ram_start = super::layout::RAM_START.raw_value();
-    let memory_node_name = format!("memory@{ram_start:x}");
-    let memory_node = fdt.begin_node(&memory_node_name)?;
-    fdt.property_string("device_type", "memory")?;
-    fdt.property_array_u64("reg", &mem_reg_property)?;
-    fdt.end_node(memory_node)?;
-
-    Ok(())
-}
-
-fn create_chosen_node(
-    fdt: &mut FdtWriter,
-    cmdline: &str,
-    initrd: &Option<InitramfsConfig>,
-) -> FdtWriterResult<()> {
-    let chosen_node = fdt.begin_node("chosen")?;
-    fdt.property_string("bootargs", cmdline)?;
-
-    if let Some(initrd_config) = initrd {
-        let initrd_start = initrd_config.address.raw_value();
-        let initrd_end = initrd_config.address.raw_value() + initrd_config.size as u64;
-        fdt.property_u64("linux,initrd-start", initrd_start)?;
-        fdt.property_u64("linux,initrd-end", initrd_end)?;
-    }
-
-    fdt.end_node(chosen_node)?;
-
-    Ok(())
-}
-
-fn create_aia_node(fdt: &mut FdtWriter, aia_device: &Arc<Mutex<dyn Vaia>>) -> FdtWriterResult<()> {
-    // IMSIC
-    if aia_device.lock().unwrap().msi_compatible() {
-        use super::layout::IMSIC_START;
-        let imsic_name = format!("imsics@{:x}", IMSIC_START.0);
-        let imsic_node = fdt.begin_node(&imsic_name)?;
-
-        fdt.property_string(
-            "compatible",
-            aia_device.lock().unwrap().imsic_compatibility(),
-        )?;
-        let imsic_reg_prop = aia_device.lock().unwrap().imsic_properties();
-        fdt.property_array_u32("reg", &imsic_reg_prop)?;
-        fdt.property_u32("#interrupt-cells", 0u32)?;
-        fdt.property_null("interrupt-controller")?;
-        fdt.property_null("msi-controller")?;
-        // TODO complete num-ids
-        fdt.property_u32("riscv,num-ids", 2047u32)?;
-        fdt.property_u32("phandle", AIA_IMSIC_PHANDLE)?;
-
-        let mut irq_cells = Vec::new();
-        let num_cpus = aia_device.lock().unwrap().vcpu_count();
-        for i in 0..num_cpus {
-            irq_cells.push(CPU_INTC_BASE_PHANDLE + i);
-            irq_cells.push(S_MODE_EXT_IRQ);
-        }
-        fdt.property_array_u32("interrupts-extended", &irq_cells)?;
-
-        fdt.end_node(imsic_node)?;
-    }
-
-    // APLIC
-    use super::layout::APLIC_START;
-    let aplic_name = format!("aplic@{:x}", APLIC_START.0);
-    let aplic_node = fdt.begin_node(&aplic_name)?;
-
-    fdt.property_string(
-        "compatible",
-        aia_device.lock().unwrap().aplic_compatibility(),
-    )?;
-    let reg_cells = aia_device.lock().unwrap().aplic_properties();
-    fdt.property_array_u32("reg", &reg_cells)?;
-    fdt.property_u32("#interrupt-cells", 2u32)?;
-    fdt.property_null("interrupt-controller")?;
-    // TODO complete num-srcs
-    fdt.property_u32("riscv,num-sources", 96u32)?;
-    fdt.property_u32("phandle", AIA_APLIC_PHANDLE)?;
-    fdt.property_u32("msi-parent", AIA_IMSIC_PHANDLE)?;
-
-    fdt.end_node(aplic_node)?;
-
-    Ok(())
-}
-
-fn create_serial_node<T: DeviceInfoForFdt + Clone + Debug>(
-    fdt: &mut FdtWriter,
-    dev_info: &T,
-) -> FdtWriterResult<()> {
-    let serial_reg_prop = [dev_info.addr(), dev_info.length()];
-    let irq = [dev_info.irq() - IRQ_BASE, IRQ_TYPE_LEVEL_HI];
-
-    let serial_node = fdt.begin_node(&format!("serial@{:x}", dev_info.addr()))?;
-    fdt.property_string("compatible", "ns16550a")?;
-    fdt.property_array_u64("reg", &serial_reg_prop)?;
-    fdt.property_u32("clock-frequency", 3686400)?;
-    fdt.property_u32("interrupt-parent", AIA_APLIC_PHANDLE)?;
-    fdt.property_array_u32("interrupts", &irq)?;
-    fdt.end_node(serial_node)?;
-
-    Ok(())
-}
-
-fn create_devices_node<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::BuildHasher>(
-    fdt: &mut FdtWriter,
-    dev_info: &HashMap<(DeviceType, String), T, S>,
-) -> FdtWriterResult<()> {
-    for ((device_type, _device_id), info) in dev_info {
-        match device_type {
-            DeviceType::Serial => create_serial_node(fdt, info)?,
-            DeviceType::Virtio(_) => unreachable!(),
-        }
-    }
-
-    Ok(())
-}
-
-fn create_pci_nodes(fdt: &mut FdtWriter, pci_device_info: &[PciSpaceInfo]) -> FdtWriterResult<()> {
-    // Add node for PCIe controller.
-    // See Documentation/devicetree/bindings/pci/host-generic-pci.txt in the kernel
-    // and https://elinux.org/Device_Tree_Usage.
-    // In multiple PCI segments setup, each PCI segment needs a PCI node.
-    for pci_device_info_elem in pci_device_info.iter() {
-        // EDK2 requires the PCIe high space above 4G address.
-        // The actual space in CLH follows the RAM. If the RAM space is small, the PCIe high space
-        // could fall below 4G.
-        // Here we cut off PCI device space below 8G in FDT to workaround the EDK2 check.
-        // But the address written in ACPI is not impacted.
-        let (pci_device_base_64bit, pci_device_size_64bit) =
-            if pci_device_info_elem.pci_device_space_start < PCI_HIGH_BASE.raw_value() {
-                (
-                    PCI_HIGH_BASE.raw_value(),
-                    pci_device_info_elem.pci_device_space_size
-                        - (PCI_HIGH_BASE.raw_value() - pci_device_info_elem.pci_device_space_start),
-                )
-            } else {
-                (
-                    pci_device_info_elem.pci_device_space_start,
-                    pci_device_info_elem.pci_device_space_size,
-                )
-            };
-        // There is no specific requirement of the 32bit MMIO range, and
-        // therefore at least we can make these ranges 4K aligned.
-        let pci_device_size_32bit: u64 =
-            MEM_32BIT_DEVICES_SIZE / ((1 << 12) * pci_device_info.len() as u64) * (1 << 12);
-        let pci_device_base_32bit: u64 = MEM_32BIT_DEVICES_START.0
-            + pci_device_size_32bit * pci_device_info_elem.pci_segment_id as u64;
-
-        let ranges = [
-            // io addresses. Since AArch64 will not use IO address,
-            // we can set the same IO address range for every segment.
-            0x1000000,
-            0_u32,
-            0_u32,
-            (MEM_PCI_IO_START.0 >> 32) as u32,
-            MEM_PCI_IO_START.0 as u32,
-            (MEM_PCI_IO_SIZE >> 32) as u32,
-            MEM_PCI_IO_SIZE as u32,
-            // mmio addresses
-            0x2000000,                            // (ss = 10: 32-bit memory space)
-            (pci_device_base_32bit >> 32) as u32, // PCI address
-            pci_device_base_32bit as u32,
-            (pci_device_base_32bit >> 32) as u32, // CPU address
-            pci_device_base_32bit as u32,
-            (pci_device_size_32bit >> 32) as u32, // size
-            pci_device_size_32bit as u32,
-            // device addresses
-            0x3000000,                            // (ss = 11: 64-bit memory space)
-            (pci_device_base_64bit >> 32) as u32, // PCI address
-            pci_device_base_64bit as u32,
-            (pci_device_base_64bit >> 32) as u32, // CPU address
-            pci_device_base_64bit as u32,
-            (pci_device_size_64bit >> 32) as u32, // size
-            pci_device_size_64bit as u32,
-        ];
-        let bus_range = [0, 0]; // Only bus 0
-        let reg = [
-            pci_device_info_elem.mmio_config_address,
-            PCI_MMIO_CONFIG_SIZE_PER_SEGMENT,
-        ];
-        // See kernel document Documentation/devicetree/bindings/pci/pci-msi.txt
-        let msi_map = [
-            // rid-base: A single cell describing the first RID matched by the entry.
-            0x0,
-            // msi-controller: A single phandle to an MSI controller.
-            AIA_IMSIC_PHANDLE,
-            // msi-base: An msi-specifier describing the msi-specifier produced for the
-            // first RID matched by the entry.
-            (pci_device_info_elem.pci_segment_id as u32) << 8,
-            // length: A single cell describing how many consecutive RIDs are matched
-            // following the rid-base.
-            0x100,
-        ];
-
-        let pci_node_name = format!("pci@{:x}", pci_device_info_elem.mmio_config_address);
-        let pci_node = fdt.begin_node(&pci_node_name)?;
-
-        fdt.property_string("compatible", "pci-host-ecam-generic")?;
-        fdt.property_string("device_type", "pci")?;
-        fdt.property_array_u32("ranges", &ranges)?;
-        fdt.property_array_u32("bus-range", &bus_range)?;
-        fdt.property_u32(
-            "linux,pci-domain",
-            pci_device_info_elem.pci_segment_id as u32,
-        )?;
-        fdt.property_u32("#address-cells", 3)?;
-        fdt.property_u32("#size-cells", 2)?;
-        fdt.property_array_u64("reg", &reg)?;
-        fdt.property_u32("#interrupt-cells", 1)?;
-        fdt.property_null("interrupt-map")?;
-        fdt.property_null("interrupt-map-mask")?;
-        fdt.property_null("dma-coherent")?;
-        fdt.property_array_u32("msi-map", &msi_map)?;
-        fdt.property_u32("msi-parent", AIA_IMSIC_PHANDLE)?;
-
-        fdt.end_node(pci_node)?;
-    }
-
-    Ok(())
-}
-
-// Parse the DTB binary and print for debugging
-pub fn print_fdt(dtb: &[u8]) {
-    match fdt_parser::Fdt::new(dtb) {
-        Ok(fdt) => {
-            if let Some(root) = fdt.find_node("/") {
-                debug!("Printing the FDT:");
-                print_node(root, 0);
-            } else {
-                debug!("Failed to find root node in FDT for debugging.");
-            }
-        }
-        Err(_) => debug!("Failed to parse FDT for debugging."),
-    }
-}
-
-fn print_node(node: fdt_parser::node::FdtNode<'_, '_>, n_spaces: usize) {
-    debug!("{:indent$}{}/", "", node.name, indent = n_spaces);
-    for property in node.properties() {
-        let name = property.name;
-
-        // If the property is 'compatible', its value requires special handling.
-        // The u8 array could contain multiple null-terminated strings.
-        // We copy the original array and simply replace all 'null' characters with spaces.
-        let value = if name == "compatible" {
-            let mut compatible = vec![0u8; 256];
-            let handled_value = property
-                .value
-                .iter()
-                .map(|&c| if c == 0 { b' ' } else { c })
-                .collect::<Vec<_>>();
-            let len = cmp::min(255, handled_value.len());
-            compatible[..len].copy_from_slice(&handled_value[..len]);
-            compatible[..(len + 1)].to_vec()
-        } else {
-            property.value.to_vec()
-        };
-        let value = &value;
-
-        // Now the value can be either:
-        //   - A null-terminated C string, or
-        //   - Binary data
-        // We follow a very simple logic to present the value:
-        //   - At first, try to convert it to CStr and print,
-        //   - If failed, print it as u32 array.
-        let value_result = match CStr::from_bytes_with_nul(value) {
-            Ok(value_cstr) => value_cstr.to_str().ok(),
-            Err(_e) => None,
-        };
-
-        if let Some(value_str) = value_result {
-            debug!(
-                "{:indent$}{} : {:#?}",
-                "",
-                name,
-                value_str,
-                indent = (n_spaces + 2)
-            );
-        } else {
-            let mut array = Vec::with_capacity(256);
-            array.resize(value.len() / 4, 0u32);
-            BigEndian::read_u32_into(value, &mut array);
-            debug!(
-                "{:indent$}{} : {:X?}",
-                "",
-                name,
-                array,
-                indent = (n_spaces + 2)
-            );
-        };
-    }
-
-    // Print children nodes if there is any
-    for child in node.children() {
-        print_node(child, n_spaces + 2);
-    }
-}

arch/src/riscv64/layout.rs

@@ -1,112 +0,0 @@
-// Copyright © 2024 Institute of Software, CAS. All rights reserved.
-// Copyright 2020 Arm Limited (or its affiliates). All rights reserved.
-// Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0
-
-//
-// Memory layout of RISC-V 64-bit guest:
-//
-// Physical  +---------------------------------------------------------------+
-// address   |                                                               |
-// end       |                                                               |
-//           ~                   ~                       ~                   ~
-//           |                                                               |
-//           |                    Highmem PCI MMIO space                     |
-//           |                                                               |
-// RAM end   +---------------------------------------------------------------+
-// (dynamic, |                                                               |
-// including |                                                               |
-// hotplug   ~                   ~                       ~                   ~
-// memory)   |                                                               |
-//           |                             DRAM                              |
-//           |                                                               |
-//           |                                                               |
-//           |                                                               |
-//           |                                                               |
-//    1 GB   +---------------------------------------------------------------+
-//           |                                                               |
-//           |                      PCI MMCONFIG space                       |
-//           |                                                               |
-//  768 MB   +---------------------------------------------------------------+
-//           |                                                               |
-//           |                                                               |
-//           |                        PCI MMIO space                         |
-//           |                                                               |
-//  256 MB   +---------------------------------------------------------------|
-//           |                                                               |
-//           |                     Legacy devices space                      |
-//           |                                                               |
-//  128 MB   +---------------------------------------------------------------|
-//           |                                                               |
-//           |                            IMSICs                             |
-//           |                                                               |
-//   64 MB   +---------------------------------------------------------------+
-//           |                                                               |
-//           |                            APLICs                             |
-//           |                                                               |
-//    4 MB   +---------------------------------------------------------------+
-//           |                          UEFI flash                           |
-//    0 GB   +---------------------------------------------------------------+
-//
-//
-
-use vm_memory::GuestAddress;
-
-/// 0x0 ~ 0x40_0000 (4 MiB) is reserved to UEFI
-/// UEFI binary size is required less than 3 MiB, reserving 4 MiB is enough.
-pub const UEFI_START: GuestAddress = GuestAddress(0);
-pub const UEFI_SIZE: u64 = 0x040_0000;
-
-/// AIA related devices
-/// See https://elixir.bootlin.com/linux/v6.10/source/arch/riscv/include/uapi/asm/kvm.h
-/// 0x40_0000 ~ 0x0400_0000 (64 MiB) resides APLICs
-pub const APLIC_START: GuestAddress = GuestAddress(0x40_0000);
-pub const APLIC_SIZE: u64 = 0x4000;
-
-/// 0x0400_0000 ~ 0x0800_0000 (64 MiB) resides IMSICs
-pub const IMSIC_START: GuestAddress = GuestAddress(0x0400_0000);
-pub const IMSIC_SIZE: u64 = 0x1000;
-
-/// Below this address will reside the AIA, above this address will reside the MMIO devices.
-const MAPPED_IO_START: GuestAddress = GuestAddress(0x0800_0000);
-
-/// Space 0x0800_0000 ~ 0x1000_0000 is reserved for legacy devices.
-pub const LEGACY_SERIAL_MAPPED_IO_START: GuestAddress = MAPPED_IO_START;
-
-/// Space 0x0905_0000 ~ 0x0906_0000 is reserved for pcie io address
-pub const MEM_PCI_IO_START: GuestAddress = GuestAddress(0x0905_0000);
-pub const MEM_PCI_IO_SIZE: u64 = 0x1_0000;
-
-/// Starting from 0x1000_0000 (256MiB) to 0x3000_0000 (768MiB) is used for PCIE MMIO
-pub const MEM_32BIT_DEVICES_START: GuestAddress = GuestAddress(0x1000_0000);
-pub const MEM_32BIT_DEVICES_SIZE: u64 = 0x2000_0000;
-
-/// PCI MMCONFIG space (start: after the device space at 768MiB, length: 256MiB)
-pub const PCI_MMCONFIG_START: GuestAddress = GuestAddress(0x3000_0000);
-pub const PCI_MMCONFIG_SIZE: u64 = 256 << 20;
-// One bus with potentially 256 devices (32 slots x 8 functions).
-pub const PCI_MMIO_CONFIG_SIZE_PER_SEGMENT: u64 = 4096 * 256;
-
-/// Start of RAM.
-pub const RAM_START: GuestAddress = GuestAddress(0x4000_0000);
-
-/// Kernel command line maximum size on RISC-V.
-/// See https://elixir.bootlin.com/linux/v6.10/source/arch/riscv/include/uapi/asm/setup.h
-pub const CMDLINE_MAX_SIZE: usize = 1024;
-
-/// FDT is at the beginning of RAM.
-pub const FDT_START: GuestAddress = RAM_START;
-pub const FDT_MAX_SIZE: u64 = 0x1_0000;
-
-/// Kernel start after FDT
-pub const KERNEL_START: GuestAddress = GuestAddress(RAM_START.0 + FDT_MAX_SIZE);
-
-/// Pci high memory base
-pub const PCI_HIGH_BASE: GuestAddress = GuestAddress(0x2_0000_0000);
-
-/// First usable interrupt on riscv64
-pub const IRQ_BASE: u32 = 0;
-
-// As per https://elixir.bootlin.com/linux/v6.10/source/arch/riscv/include/asm/kvm_host.h#L31
-/// Number of supported interrupts
-pub const IRQ_NUM: u32 = 1023;

arch/src/riscv64/mod.rs

@@ -1,169 +0,0 @@
-// Copyright © 2024 Institute of Software, CAS. All rights reserved.
-// Copyright 2020 Arm Limited (or its affiliates). All rights reserved.
-// Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0
-
-/// Module for the flattened device tree.
-pub mod fdt;
-/// Layout for this riscv64 system.
-pub mod layout;
-/// Module for loading UEFI binary.
-pub mod uefi;
-
-use std::collections::HashMap;
-use std::fmt::Debug;
-use std::sync::{Arc, Mutex};
-
-use hypervisor::arch::riscv64::aia::Vaia;
-use log::{Level, log_enabled};
-use thiserror::Error;
-use vm_memory::{Address, GuestAddress, GuestMemory, GuestMemoryAtomic};
-
-pub use self::fdt::DeviceInfoForFdt;
-use crate::{DeviceType, GuestMemoryMmap, PciSpaceInfo, RegionType};
-
-pub const _NSIG: i32 = 65;
-
-/// Errors thrown while configuring riscv64 system.
-#[derive(Debug, Error)]
-pub enum Error {
-    /// Failed to create a FDT.
-    #[error("Failed to create a FDT")]
-    SetupFdt,
-
-    /// Failed to write FDT to memory.
-    #[error("Failed to write FDT to memory")]
-    WriteFdtToMemory(#[source] fdt::Error),
-
-    /// Failed to create a AIA.
-    #[error("Failed to create a AIA")]
-    SetupAia,
-
-    /// Failed to compute the initramfs address.
-    #[error("Failed to compute the initramfs address")]
-    InitramfsAddress,
-
-    /// Error configuring the general purpose registers
-    #[error("Error configuring the general purpose registers")]
-    RegsConfiguration(#[source] hypervisor::HypervisorCpuError),
-}
-
-#[derive(Debug, Copy, Clone)]
-/// Specifies the entry point address where the guest must start
-/// executing code.
-pub struct EntryPoint {
-    /// Address in guest memory where the guest must start execution
-    pub entry_addr: GuestAddress,
-}
-
-/// Configure the specified VCPU, and return its MPIDR.
-pub fn configure_vcpu(
-    vcpu: &Arc<dyn hypervisor::Vcpu>,
-    id: u32,
-    boot_setup: Option<(EntryPoint, &GuestMemoryAtomic<GuestMemoryMmap>)>,
-) -> super::Result<()> {
-    if let Some((kernel_entry_point, _guest_memory)) = boot_setup {
-        vcpu.setup_regs(
-            id,
-            kernel_entry_point.entry_addr.raw_value(),
-            layout::FDT_START.raw_value(),
-        )
-        .map_err(Error::RegsConfiguration)?;
-    }
-
-    Ok(())
-}
-
-pub fn arch_memory_regions() -> Vec<(GuestAddress, usize, RegionType)> {
-    vec![
-        // 0 MiB ~ 256 MiB: AIA and legacy devices
-        (
-            GuestAddress(0),
-            layout::MEM_32BIT_DEVICES_START.0 as usize,
-            RegionType::Reserved,
-        ),
-        // 256 MiB ~ 768 MiB: MMIO space
-        (
-            layout::MEM_32BIT_DEVICES_START,
-            layout::MEM_32BIT_DEVICES_SIZE as usize,
-            RegionType::SubRegion,
-        ),
-        // 768 MiB ~ 1 GiB: reserved. The leading 256M for PCIe MMCONFIG space
-        (
-            layout::PCI_MMCONFIG_START,
-            layout::PCI_MMCONFIG_SIZE as usize,
-            RegionType::Reserved,
-        ),
-        // 1GiB ~ inf: RAM
-        (layout::RAM_START, usize::MAX, RegionType::Ram),
-    ]
-}
-
-/// 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: &str,
-    num_vcpu: u32,
-    device_info: &HashMap<(DeviceType, String), T, S>,
-    initrd: &Option<super::InitramfsConfig>,
-    pci_space_info: &[PciSpaceInfo],
-    aia_device: &Arc<Mutex<dyn Vaia>>,
-) -> super::Result<()> {
-    let fdt_final = fdt::create_fdt(
-        guest_mem,
-        cmdline,
-        num_vcpu,
-        device_info,
-        aia_device,
-        initrd,
-        pci_space_info,
-    )
-    .map_err(|_| Error::SetupFdt)?;
-
-    if log_enabled!(Level::Debug) {
-        fdt::print_fdt(&fdt_final);
-    }
-
-    fdt::write_fdt_to_memory(fdt_final, guest_mem).map_err(Error::WriteFdtToMemory)?;
-
-    Ok(())
-}
-
-/// Returns the memory address where the initramfs could be loaded.
-pub fn initramfs_load_addr(
-    guest_mem: &GuestMemoryMmap,
-    initramfs_size: usize,
-) -> super::Result<u64> {
-    let round_to_pagesize = |size| (size + (super::PAGE_SIZE - 1)) & !(super::PAGE_SIZE - 1);
-    match guest_mem
-        .last_addr()
-        .checked_sub(round_to_pagesize(initramfs_size) as u64 - 1)
-    {
-        Some(offset) => {
-            if guest_mem.address_in_range(offset) {
-                Ok(offset.raw_value())
-            } else {
-                Err(super::Error::PlatformSpecific(Error::InitramfsAddress))
-            }
-        }
-        None => Err(super::Error::PlatformSpecific(Error::InitramfsAddress)),
-    }
-}
-
-pub fn get_host_cpu_phys_bits(_hypervisor: &Arc<dyn hypervisor::Hypervisor>) -> u8 {
-    40
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_arch_memory_regions_dram() {
-        let regions = arch_memory_regions();
-        assert_eq!(4, regions.len());
-        assert_eq!(layout::RAM_START, regions[3].0);
-        assert_eq!(RegionType::Ram, regions[3].2);
-    }
-}

arch/src/riscv64/uefi.rs

@@ -1,50 +0,0 @@
-// Copyright 2020 Arm Limited (or its affiliates). All rights reserved.
-//
-// SPDX-License-Identifier: Apache-2.0
-
-use std::io::{Read, Seek, SeekFrom};
-use std::os::fd::AsFd;
-use std::result;
-
-use thiserror::Error;
-use vm_memory::{GuestAddress, GuestMemory};
-
-/// Errors thrown while loading UEFI binary
-#[derive(Debug, Error)]
-pub enum Error {
-    /// Unable to seek to UEFI image start.
-    #[error("Unable to seek to UEFI image start")]
-    SeekUefiStart,
-    /// Unable to seek to UEFI image end.
-    #[error("Unable to seek to UEFI image end")]
-    SeekUefiEnd,
-    /// UEFI image too big.
-    #[error("UEFI image too big")]
-    UefiTooBig,
-    /// Unable to read UEFI image
-    #[error("Unable to read UEFI image")]
-    ReadUefiImage,
-}
-type Result<T> = result::Result<T, Error>;
-
-pub fn load_uefi<F, M: GuestMemory>(
-    guest_mem: &M,
-    guest_addr: GuestAddress,
-    uefi_image: &mut F,
-) -> Result<()>
-where
-    F: Read + Seek + AsFd,
-{
-    let uefi_size = uefi_image
-        .seek(SeekFrom::End(0))
-        .map_err(|_| Error::SeekUefiEnd)? as usize;
-
-    // edk2 image on virtual platform is smaller than 3M
-    if uefi_size > 0x300000 {
-        return Err(Error::UefiTooBig);
-    }
-    uefi_image.rewind().map_err(|_| Error::SeekUefiStart)?;
-    guest_mem
-        .read_exact_volatile_from(guest_addr, &mut uefi_image.as_fd(), uefi_size)
-        .map_err(|_| Error::ReadUefiImage)
-}

arch/src/x86_64/mpspec.rs

@@ -1,10 +1,6 @@
 // Copyright 2017 The Chromium OS Authors. All rights reserved.
-//
-// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
-#![allow(non_camel_case_types)]
-use vm_memory::ByteValued;
 
 pub const MP_PROCESSOR: ::std::os::raw::c_uint = 0;
 pub const MP_BUS: ::std::os::raw::c_uint = 1;
@@ -19,7 +15,7 @@ pub const MP_IRQDIR_DEFAULT: ::std::os::raw::c_uint = 0;
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct mpf_intel {
-    pub signature: [::std::os::raw::c_uchar; 4usize],
+    pub signature: [::std::os::raw::c_char; 4usize],
     pub physptr: ::std::os::raw::c_uint,
     pub length: ::std::os::raw::c_uchar,
     pub specification: ::std::os::raw::c_uchar,
@@ -31,22 +27,15 @@ pub struct mpf_intel {
     pub feature5: ::std::os::raw::c_uchar,
 }
 
-const _: () = assert!(::core::mem::size_of::<mpf_intel>() == 16);
-// SAFETY: all members of this struct are plain integers
-// and the sum of their sizes is the size of the struct, so
-// padding and reserved values are not possible as there
-// would be nowhere for them to exist.
-unsafe impl ByteValued for mpf_intel {}
-
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct mpc_table {
-    pub signature: [::std::os::raw::c_uchar; 4usize],
+    pub signature: [::std::os::raw::c_char; 4usize],
     pub length: ::std::os::raw::c_ushort,
-    pub spec: ::std::os::raw::c_uchar,
-    pub checksum: ::std::os::raw::c_uchar,
-    pub oem: [::std::os::raw::c_uchar; 8usize],
-    pub productid: [::std::os::raw::c_uchar; 12usize],
+    pub spec: ::std::os::raw::c_char,
+    pub checksum: ::std::os::raw::c_char,
+    pub oem: [::std::os::raw::c_char; 8usize],
+    pub productid: [::std::os::raw::c_char; 12usize],
     pub oemptr: ::std::os::raw::c_uint,
     pub oemsize: ::std::os::raw::c_ushort,
     pub oemcount: ::std::os::raw::c_ushort,
@@ -54,19 +43,6 @@ pub struct mpc_table {
     pub reserved: ::std::os::raw::c_uint,
 }
 
-const _: () = {
-    assert!(::core::mem::size_of::<mpc_table>() == 4 + 2 + 1 + 1 + 8 + 12 + 4 + 2 + 2 + 4 + 4);
-    assert!(::core::mem::size_of::<::std::os::raw::c_uint>() == 4);
-    assert!(::core::mem::size_of::<::std::os::raw::c_ushort>() == 2);
-    assert!(::core::mem::size_of::<::std::os::raw::c_uchar>() == 1);
-};
-
-// SAFETY: all members of this struct are plain integers
-// and the sum of their sizes is the size of the struct, so
-// padding and reserved values are not possible as there
-// would be nowhere for them to exist.
-unsafe impl ByteValued for mpc_table {}
-
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct mpc_cpu {
@@ -79,13 +55,6 @@ pub struct mpc_cpu {
     pub reserved: [::std::os::raw::c_uint; 2usize],
 }
 
-const _: () = assert!(::core::mem::size_of::<mpc_cpu>() == 20);
-// SAFETY: all members of this struct are plain integers
-// and the sum of their sizes is the size of the struct, so
-// padding and reserved values are not possible as there
-// would be nowhere for them to exist.
-unsafe impl ByteValued for mpc_cpu {}
-
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct mpc_bus {
@@ -94,13 +63,6 @@ pub struct mpc_bus {
     pub bustype: [::std::os::raw::c_uchar; 6usize],
 }
 
-const _: () = assert!(::core::mem::size_of::<mpc_bus>() == 8);
-// SAFETY: all members of this struct are plain integers
-// and the sum of their sizes is the size of the struct, so
-// padding and reserved values are not possible as there
-// would be nowhere for them to exist.
-unsafe impl ByteValued for mpc_bus {}
-
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct mpc_ioapic {
@@ -111,13 +73,6 @@ pub struct mpc_ioapic {
     pub apicaddr: ::std::os::raw::c_uint,
 }
 
-const _: () = assert!(::core::mem::size_of::<mpc_ioapic>() == 8);
-// SAFETY: all members of this struct are plain integers
-// and the sum of their sizes is the size of the struct, so
-// padding and reserved values are not possible as there
-// would be nowhere for them to exist.
-unsafe impl ByteValued for mpc_ioapic {}
-
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct mpc_intsrc {
@@ -130,13 +85,6 @@ pub struct mpc_intsrc {
     pub dstirq: ::std::os::raw::c_uchar,
 }
 
-const _: () = assert!(::core::mem::size_of::<mpc_intsrc>() == 8);
-// SAFETY: all members of this struct are plain integers
-// and the sum of their sizes is the size of the struct, so
-// padding and reserved values are not possible as there
-// would be nowhere for them to exist.
-unsafe impl ByteValued for mpc_intsrc {}
-
 pub const MP_IRQ_SOURCE_TYPES_MP_INT: ::std::os::raw::c_uint = 0;
 pub const MP_IRQ_SOURCE_TYPES_MP_NMI: ::std::os::raw::c_uint = 1;
 pub const MP_IRQ_SOURCE_TYPES_MP_EXT_INT: ::std::os::raw::c_uint = 3;
@@ -153,26 +101,12 @@ pub struct mpc_lintsrc {
     pub destapiclint: ::std::os::raw::c_uchar,
 }
 
-const _: () = assert!(::core::mem::size_of::<mpc_lintsrc>() == 8);
-// SAFETY: all members of this struct are plain integers
-// and the sum of their sizes is the size of the struct, so
-// padding and reserved values are not possible as there
-// would be nowhere for them to exist.
-unsafe impl ByteValued for mpc_lintsrc {}
-
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct mpc_oemtable {
-    pub signature: [::std::os::raw::c_uchar; 4usize],
+    pub signature: [::std::os::raw::c_char; 4usize],
     pub length: ::std::os::raw::c_ushort,
-    pub rev: ::std::os::raw::c_uchar,
-    pub checksum: ::std::os::raw::c_uchar,
-    pub mpc: [::std::os::raw::c_uchar; 8usize],
+    pub rev: ::std::os::raw::c_char,
+    pub checksum: ::std::os::raw::c_char,
+    pub mpc: [::std::os::raw::c_char; 8usize],
 }
-
-const _: () = assert!(::core::mem::size_of::<mpc_oemtable>() == 16);
-// SAFETY: all members of this struct are plain integers
-// and the sum of their sizes is the size of the struct, so
-// padding and reserved values are not possible as there
-// would be nowhere for them to exist.
-unsafe impl ByteValued for mpc_oemtable {}

arch/src/x86_64/mptable.rs

@@ -5,16 +5,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
 
-use std::{mem, result, slice};
-
-use libc::c_uchar;
-use thiserror::Error;
-use vm_memory::{Address, ByteValued, Bytes, GuestAddress, GuestMemory, GuestMemoryError};
-
-use super::MAX_SUPPORTED_CPUS_LEGACY;
-use crate::GuestMemoryMmap;
 use crate::layout::{APIC_START, HIGH_RAM_START, IOAPIC_START};
 use crate::x86_64::{get_x2apic_id, mpspec};
+use crate::GuestMemoryMmap;
+use libc::c_char;
+use std::mem;
+use std::result;
+use std::slice;
+use vm_memory::{Address, ByteValued, Bytes, GuestAddress, GuestMemory, GuestMemoryError};
 
 // This is a workaround to the Rust enforcement specifying that any implementation of a foreign
 // trait (in this case `ByteValued`) where:
@@ -51,55 +49,57 @@ unsafe impl ByteValued for MpcLintsrcWrapper {}
 // SAFETY: see above
 unsafe impl ByteValued for MpfIntelWrapper {}
 
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
     /// There was too little guest memory to store the entire MP table.
-    #[error("There was too little guest memory to store the entire MP table")]
     NotEnoughMemory,
     /// The MP table has too little address space to be stored.
-    #[error("The MP table has too little address space to be stored")]
     AddressOverflow,
     /// Failure while zeroing out the memory for the MP table.
-    #[error("Failure while zeroing out the memory for the MP table")]
-    Clear(#[source] GuestMemoryError),
+    Clear(GuestMemoryError),
+    /// Number of CPUs exceeds the maximum supported CPUs
+    TooManyCpus,
     /// Failure to write the MP floating pointer.
-    #[error("Failure to write the MP floating pointer")]
-    WriteMpfIntel(#[source] GuestMemoryError),
+    WriteMpfIntel(GuestMemoryError),
     /// Failure to write MP CPU entry.
-    #[error("Failure to write MP CPU entry")]
-    WriteMpcCpu(#[source] GuestMemoryError),
+    WriteMpcCpu(GuestMemoryError),
     /// Failure to write MP ioapic entry.
-    #[error("Failure to write MP ioapic entry")]
-    WriteMpcIoapic(#[source] GuestMemoryError),
+    WriteMpcIoapic(GuestMemoryError),
     /// Failure to write MP bus entry.
-    #[error("Failure to write MP bus entry")]
-    WriteMpcBus(#[source] GuestMemoryError),
+    WriteMpcBus(GuestMemoryError),
     /// Failure to write MP interrupt source entry.
-    #[error("Failure to write MP interrupt source entry")]
-    WriteMpcIntsrc(#[source] GuestMemoryError),
+    WriteMpcIntsrc(GuestMemoryError),
     /// Failure to write MP local interrupt source entry.
-    #[error("Failure to write MP local interrupt source entry")]
-    WriteMpcLintsrc(#[source] GuestMemoryError),
+    WriteMpcLintsrc(GuestMemoryError),
     /// Failure to write MP table header.
-    #[error("Failure to write MP table header")]
-    WriteMpcTable(#[source] GuestMemoryError),
+    WriteMpcTable(GuestMemoryError),
 }
 
 pub type Result<T> = result::Result<T, Error>;
 
+// With APIC/xAPIC, there are only 255 APIC IDs available. And IOAPIC occupies
+// one APIC ID, so only 254 CPUs at maximum may be supported. Actually it's
+// a large number for FC usecases.
+pub const MAX_SUPPORTED_CPUS: u32 = 254;
+
+// Convenience macro for making arrays of diverse character types.
+macro_rules! char_array {
+    ($t:ty; $( $c:expr ),*) => ( [ $( $c as $t ),* ] )
+}
+
 // Most of these variables are sourced from the Intel MP Spec 1.4.
-const SMP_MAGIC_IDENT: &[c_uchar; 4] = b"_MP_";
-const MPC_SIGNATURE: &[c_uchar; 4] = b"PCMP";
-const MPC_SPEC: u8 = 4;
-const MPC_OEM: &[c_uchar; 8] = b"FC      ";
-const MPC_PRODUCT_ID: &[c_uchar; 12] = &[b'0'; 12];
-const BUS_TYPE_ISA: &[c_uchar; 6] = b"ISA   ";
+const SMP_MAGIC_IDENT: [c_char; 4] = char_array!(c_char; '_', 'M', 'P', '_');
+const MPC_SIGNATURE: [c_char; 4] = char_array!(c_char; 'P', 'C', 'M', 'P');
+const MPC_SPEC: i8 = 4;
+const MPC_OEM: [c_char; 8] = char_array!(c_char; 'F', 'C', ' ', ' ', ' ', ' ', ' ', ' ');
+const MPC_PRODUCT_ID: [c_char; 12] = ['0' as c_char; 12];
+const BUS_TYPE_ISA: [u8; 6] = char_array!(u8; 'I', 'S', 'A', ' ', ' ', ' ');
 const APIC_VERSION: u8 = 0x14;
 const CPU_STEPPING: u32 = 0x600;
 const CPU_FEATURE_APIC: u32 = 0x200;
 const CPU_FEATURE_FPU: u32 = 0x001;
 
-fn compute_checksum<T: Copy + ByteValued>(v: &T) -> u8 {
+fn compute_checksum<T: Copy>(v: &T) -> u8 {
     // SAFETY: we are only reading the bytes within the size of the `T` reference `v`.
     let v_slice = unsafe { slice::from_raw_parts(v as *const T as *const u8, mem::size_of::<T>()) };
     let mut checksum: u8 = 0;
@@ -114,7 +114,7 @@ fn mpf_intel_compute_checksum(v: &mpspec::mpf_intel) -> u8 {
     (!checksum).wrapping_add(1)
 }
 
-fn compute_mp_size(num_cpus: u32) -> usize {
+fn compute_mp_size(num_cpus: u8) -> usize {
     mem::size_of::<MpfIntelWrapper>()
         + mem::size_of::<MpcTableWrapper>()
         + mem::size_of::<MpcCpuWrapper>() * (num_cpus as usize)
@@ -128,15 +128,14 @@ fn compute_mp_size(num_cpus: u32) -> usize {
 pub fn setup_mptable(
     offset: GuestAddress,
     mem: &GuestMemoryMmap,
-    num_cpus: u32,
-    topology: Option<(u16, u16, u16, u16)>,
+    num_cpus: u8,
+    topology: Option<(u8, u8, u8)>,
 ) -> Result<()> {
     if num_cpus > 0 {
         let cpu_id_max = num_cpus - 1;
-        let x2apic_id_max = get_x2apic_id(cpu_id_max, topology);
-        if x2apic_id_max >= MAX_SUPPORTED_CPUS_LEGACY {
-            info!("Skipping mptable creation due to too many CPUs");
-            return Ok(());
+        let x2apic_id_max = get_x2apic_id(cpu_id_max.into(), topology);
+        if x2apic_id_max >= MAX_SUPPORTED_CPUS {
+            return Err(Error::TooManyCpus);
         }
     }
 
@@ -151,7 +150,7 @@ pub fn setup_mptable(
     }
 
     let mut checksum: u8 = 0;
-    let ioapicid: u8 = MAX_SUPPORTED_CPUS_LEGACY as u8 + 1;
+    let ioapicid: u8 = MAX_SUPPORTED_CPUS as u8 + 1;
 
     // The checked_add here ensures the all of the following base_mp.unchecked_add's will be without
     // overflow.
@@ -169,7 +168,7 @@ pub fn setup_mptable(
     {
         let mut mpf_intel = MpfIntelWrapper(mpspec::mpf_intel::default());
         let size = mem::size_of::<MpfIntelWrapper>() as u64;
-        mpf_intel.0.signature = *SMP_MAGIC_IDENT;
+        mpf_intel.0.signature = SMP_MAGIC_IDENT;
         mpf_intel.0.length = 1;
         mpf_intel.0.specification = 4;
         mpf_intel.0.physptr = (base_mp.raw_value() + size) as u32;
@@ -189,7 +188,7 @@ pub fn setup_mptable(
         for cpu_id in 0..num_cpus {
             let mut mpc_cpu = MpcCpuWrapper(mpspec::mpc_cpu::default());
             mpc_cpu.0.type_ = mpspec::MP_PROCESSOR as u8;
-            mpc_cpu.0.apicid = get_x2apic_id(cpu_id, topology) as u8;
+            mpc_cpu.0.apicid = get_x2apic_id(cpu_id as u32, topology) as u8;
             mpc_cpu.0.apicver = APIC_VERSION;
             mpc_cpu.0.cpuflag = mpspec::CPU_ENABLED as u8
                 | if cpu_id == 0 {
@@ -210,7 +209,7 @@ pub fn setup_mptable(
         let mut mpc_bus = MpcBusWrapper(mpspec::mpc_bus::default());
         mpc_bus.0.type_ = mpspec::MP_BUS as u8;
         mpc_bus.0.busid = 0;
-        mpc_bus.0.bustype = *BUS_TYPE_ISA;
+        mpc_bus.0.bustype = BUS_TYPE_ISA;
         mem.write_obj(mpc_bus, base_mp)
             .map_err(Error::WriteMpcBus)?;
         base_mp = base_mp.unchecked_add(size as u64);
@@ -281,14 +280,14 @@ pub fn setup_mptable(
 
     {
         let mut mpc_table = MpcTableWrapper(mpspec::mpc_table::default());
-        mpc_table.0.signature = *MPC_SIGNATURE;
+        mpc_table.0.signature = MPC_SIGNATURE;
         mpc_table.0.length = table_end.unchecked_offset_from(table_base) as u16;
         mpc_table.0.spec = MPC_SPEC;
-        mpc_table.0.oem = *MPC_OEM;
-        mpc_table.0.productid = *MPC_PRODUCT_ID;
+        mpc_table.0.oem = MPC_OEM;
+        mpc_table.0.productid = MPC_PRODUCT_ID;
         mpc_table.0.lapic = APIC_START.0 as u32;
         checksum = checksum.wrapping_add(compute_checksum(&mpc_table.0));
-        mpc_table.0.checksum = (!checksum).wrapping_add(1);
+        mpc_table.0.checksum = (!checksum).wrapping_add(1) as i8;
         mem.write_obj(mpc_table, table_base)
             .map_err(Error::WriteMpcTable)?;
     }
@@ -298,11 +297,12 @@ pub fn setup_mptable(
 
 #[cfg(test)]
 mod tests {
-    use vm_memory::bitmap::BitmapSlice;
-    use vm_memory::{GuestUsize, VolatileMemoryError, VolatileSlice, WriteVolatile};
-
     use super::*;
     use crate::layout::MPTABLE_START;
+    use vm_memory::{
+        bitmap::BitmapSlice, GuestAddress, GuestUsize, VolatileMemoryError, VolatileSlice,
+        WriteVolatile,
+    };
 
     fn table_entry_size(type_: u8) -> usize {
         match type_ as u32 {
@@ -330,7 +330,7 @@ mod tests {
         let mem = GuestMemoryMmap::from_ranges(&[(MPTABLE_START, compute_mp_size(num_cpus) - 1)])
             .unwrap();
 
-        setup_mptable(MPTABLE_START, &mem, num_cpus, None).unwrap_err();
+        assert!(setup_mptable(MPTABLE_START, &mem, num_cpus, None).is_err());
     }
 
     #[test]
@@ -388,11 +388,11 @@ mod tests {
     fn cpu_entry_count() {
         let mem = GuestMemoryMmap::from_ranges(&[(
             MPTABLE_START,
-            compute_mp_size(MAX_SUPPORTED_CPUS_LEGACY),
+            compute_mp_size(MAX_SUPPORTED_CPUS as u8),
         )])
         .unwrap();
 
-        for i in 0..MAX_SUPPORTED_CPUS_LEGACY {
+        for i in 0..MAX_SUPPORTED_CPUS as u8 {
             setup_mptable(MPTABLE_START, &mem, i, None).unwrap();
 
             let mpf_intel: MpfIntelWrapper = mem.read_obj(MPTABLE_START).unwrap();
@@ -422,9 +422,11 @@ mod tests {
 
     #[test]
     fn cpu_entry_count_max() {
-        let cpus = MAX_SUPPORTED_CPUS_LEGACY + 1;
-        let mem = GuestMemoryMmap::from_ranges(&[(MPTABLE_START, compute_mp_size(cpus))]).unwrap();
+        let cpus = MAX_SUPPORTED_CPUS + 1;
+        let mem =
+            GuestMemoryMmap::from_ranges(&[(MPTABLE_START, compute_mp_size(cpus as u8))]).unwrap();
 
-        setup_mptable(MPTABLE_START, &mem, cpus, None).unwrap();
+        let result = setup_mptable(MPTABLE_START, &mem, cpus as u8, None);
+        assert!(result.is_err());
     }
 }

arch/src/x86_64/regs.rs

@@ -6,58 +6,41 @@
 // Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
-use std::sync::Arc;
-use std::{mem, result};
-
+use crate::layout::{BOOT_GDT_START, BOOT_IDT_START, PVH_INFO_START};
+use crate::GuestMemoryMmap;
 use hypervisor::arch::x86::gdt::{gdt_entry, segment_from_gdt};
 use hypervisor::arch::x86::regs::CR0_PE;
-use hypervisor::arch::x86::{FpuState, SpecialRegisters};
-use thiserror::Error;
+use hypervisor::arch::x86::{FpuState, SpecialRegisters, StandardRegisters};
+use std::sync::Arc;
+use std::{mem, result};
 use vm_memory::{Address, Bytes, GuestMemory, GuestMemoryError};
 
-use crate::layout::{
-    BOOT_GDT_START, BOOT_IDT_START, BOOT_STACK_POINTER, PVH_INFO_START, ZERO_PAGE_START,
-};
-use crate::{EntryPoint, GuestMemoryMmap};
-
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
     /// Failed to get SREGs for this CPU.
-    #[error("Failed to get SREGs for this CPU")]
-    GetStatusRegisters(#[source] hypervisor::HypervisorCpuError),
+    GetStatusRegisters(hypervisor::HypervisorCpuError),
     /// Failed to set base registers for this CPU.
-    #[error("Failed to set base registers for this CPU")]
-    SetBaseRegisters(#[source] hypervisor::HypervisorCpuError),
+    SetBaseRegisters(hypervisor::HypervisorCpuError),
     /// Failed to configure the FPU.
-    #[error("Failed to configure the FPU")]
-    SetFpuRegisters(#[source] hypervisor::HypervisorCpuError),
+    SetFpuRegisters(hypervisor::HypervisorCpuError),
     /// Setting up MSRs failed.
-    #[error("Setting up MSRs failed")]
-    SetModelSpecificRegisters(#[source] hypervisor::HypervisorCpuError),
+    SetModelSpecificRegisters(hypervisor::HypervisorCpuError),
     /// Failed to set SREGs for this CPU.
-    #[error("Failed to set SREGs for this CPU")]
-    SetStatusRegisters(#[source] hypervisor::HypervisorCpuError),
+    SetStatusRegisters(hypervisor::HypervisorCpuError),
     /// Checking the GDT address failed.
-    #[error("Checking the GDT address failed")]
     CheckGdtAddr,
     /// Writing the GDT to RAM failed.
-    #[error("Writing the GDT to RAM failed")]
-    WriteGdt(#[source] GuestMemoryError),
+    WriteGdt(GuestMemoryError),
     /// Writing the IDT to RAM failed.
-    #[error("Writing the IDT to RAM failed")]
-    WriteIdt(#[source] GuestMemoryError),
+    WriteIdt(GuestMemoryError),
     /// Writing PDPTE to RAM failed.
-    #[error("Writing PDPTE to RAM failed")]
-    WritePdpteAddress(#[source] GuestMemoryError),
+    WritePdpteAddress(GuestMemoryError),
     /// Writing PDE to RAM failed.
-    #[error("Writing PDE to RAM failed")]
-    WritePdeAddress(#[source] GuestMemoryError),
+    WritePdeAddress(GuestMemoryError),
     /// Writing PML4 to RAM failed.
-    #[error("Writing PML4 to RAM failed")]
-    WritePml4Address(#[source] GuestMemoryError),
+    WritePml4Address(GuestMemoryError),
     /// Writing PML5 to RAM failed.
-    #[error("Writing PML5 to RAM failed")]
-    WritePml5Address(#[source] GuestMemoryError),
+    WritePml5Address(GuestMemoryError),
 }
 
 pub type Result<T> = result::Result<T, Error>;
@@ -94,21 +77,13 @@ pub fn setup_msrs(vcpu: &Arc<dyn hypervisor::Vcpu>) -> Result<()> {
 /// # Arguments
 ///
 /// * `vcpu` - Structure for the VCPU that holds the VCPU's fd.
-/// * `entry_point` - Description of the boot entry to set up.
-pub fn setup_regs(vcpu: &Arc<dyn hypervisor::Vcpu>, entry_point: EntryPoint) -> Result<()> {
-    let mut regs = vcpu.create_standard_regs();
-    match entry_point.setup_header {
-        None => {
-            regs.set_rflags(0x0000000000000002u64);
-            regs.set_rip(entry_point.entry_addr.raw_value());
-            regs.set_rbx(PVH_INFO_START.raw_value());
-        }
-        Some(_) => {
-            regs.set_rflags(0x0000000000000002u64);
-            regs.set_rip(entry_point.entry_addr.raw_value());
-            regs.set_rsp(BOOT_STACK_POINTER.raw_value());
-            regs.set_rsi(ZERO_PAGE_START.raw_value());
-        }
+/// * `boot_ip` - Starting instruction pointer.
+pub fn setup_regs(vcpu: &Arc<dyn hypervisor::Vcpu>, boot_ip: u64) -> Result<()> {
+    let regs = StandardRegisters {
+        rflags: 0x0000000000000002u64,
+        rbx: PVH_INFO_START.raw_value(),
+        rip: boot_ip,
+        ..Default::default()
     };
     vcpu.set_regs(&regs).map_err(Error::SetBaseRegisters)
 }
@@ -119,13 +94,9 @@ pub fn setup_regs(vcpu: &Arc<dyn hypervisor::Vcpu>, entry_point: EntryPoint) ->
 ///
 /// * `mem` - The memory that will be passed to the guest.
 /// * `vcpu` - Structure for the VCPU that holds the VCPU's fd.
-pub fn setup_sregs(
-    mem: &GuestMemoryMmap,
-    vcpu: &Arc<dyn hypervisor::Vcpu>,
-    enable_x2_apic_mode: bool,
-) -> Result<()> {
+pub fn setup_sregs(mem: &GuestMemoryMmap, vcpu: &Arc<dyn hypervisor::Vcpu>) -> Result<()> {
     let mut sregs: SpecialRegisters = vcpu.get_sregs().map_err(Error::GetStatusRegisters)?;
-    configure_segments_and_sregs(mem, &mut sregs, enable_x2_apic_mode)?;
+    configure_segments_and_sregs(mem, &mut sregs)?;
     vcpu.set_sregs(&sregs).map_err(Error::SetStatusRegisters)
 }
 
@@ -152,7 +123,6 @@ fn write_idt_value(val: u64, guest_mem: &GuestMemoryMmap) -> Result<()> {
 pub fn configure_segments_and_sregs(
     mem: &GuestMemoryMmap,
     sregs: &mut SpecialRegisters,
-    enable_x2_apic_mode: bool,
 ) -> Result<()> {
     let gdt_table: [u64; BOOT_GDT_MAX] = {
         // Configure GDT entries as specified by PVH boot protocol
@@ -188,19 +158,14 @@ pub fn configure_segments_and_sregs(
     sregs.cr0 = CR0_PE;
     sregs.cr4 = 0;
 
-    if enable_x2_apic_mode {
-        const X2APIC_ENABLE_BIT: u64 = 1 << 10;
-        sregs.apic_base |= X2APIC_ENABLE_BIT;
-    }
-
     Ok(())
 }
 
 #[cfg(test)]
 mod tests {
-    use vm_memory::GuestAddress;
-
     use super::*;
+    use crate::GuestMemoryMmap;
+    use vm_memory::GuestAddress;
 
     fn create_guest_mem() -> GuestMemoryMmap {
         GuestMemoryMmap::from_ranges(&[(GuestAddress(0), 0x10000)]).unwrap()
@@ -214,7 +179,7 @@ mod tests {
     fn segments_and_sregs() {
         let mut sregs: SpecialRegisters = Default::default();
         let gm = create_guest_mem();
-        configure_segments_and_sregs(&gm, &mut sregs, false).unwrap();
+        configure_segments_and_sregs(&gm, &mut sregs).unwrap();
         assert_eq!(0x0, read_u64(&gm, BOOT_GDT_START));
         assert_eq!(
             0xcf9b000000ffff,

arch/src/x86_64/smbios.rs

@@ -6,35 +6,53 @@
 //
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
-use std::{mem, result, slice};
-
-use thiserror::Error;
-use uuid::Uuid;
-use vm_memory::{Address, ByteValued, Bytes, GuestAddress};
-
-use crate::GuestMemoryMmap;
 use crate::layout::SMBIOS_START;
+use crate::GuestMemoryMmap;
+use std::fmt::{self, Display};
+use std::mem;
+use std::result;
+use std::slice;
+use uuid::Uuid;
+use vm_memory::ByteValued;
+use vm_memory::{Address, Bytes, GuestAddress};
 
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
     /// There was too little guest memory to store the entire SMBIOS table.
-    #[error("There was too little guest memory to store the SMBIOS table")]
     NotEnoughMemory,
     /// The SMBIOS table has too little address space to be stored.
-    #[error("The SMBIOS table has too little address space to be stored")]
     AddressOverflow,
     /// Failure while zeroing out the memory for the SMBIOS table.
-    #[error("Failure while zeroing out the memory for the SMBIOS table")]
     Clear,
     /// Failure to write SMBIOS entrypoint structure
-    #[error("Failure to write SMBIOS entrypoint structure")]
     WriteSmbiosEp,
     /// Failure to write additional data to memory
-    #[error("Failure to write additional data to memory")]
     WriteData,
     /// Failure to parse uuid, uuid format may be error
-    #[error("Failure to parse uuid")]
-    ParseUuid(#[source] uuid::Error),
+    ParseUuid(uuid::Error),
+}
+
+impl std::error::Error for Error {}
+
+impl Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::Error::*;
+
+        let description = match self {
+            NotEnoughMemory => {
+                "There was too little guest memory to store the SMBIOS table".to_string()
+            }
+            AddressOverflow => {
+                "The SMBIOS table has too little address space to be stored".to_string()
+            }
+            Clear => "Failure while zeroing out the memory for the SMBIOS table".to_string(),
+            WriteSmbiosEp => "Failure to write SMBIOS entrypoint structure".to_string(),
+            WriteData => "Failure to write additional data to memory".to_string(),
+            ParseUuid(e) => format!("Failure to parse uuid: {e}"),
+        };
+
+        write!(f, "SMBIOS error: {description}")
+    }
 }
 
 pub type Result<T> = result::Result<T, Error>;

arch/src/x86_64/tdx/mod.rs

@@ -1,23 +1,21 @@
 // Copyright © 2021 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0
+use crate::GuestMemoryMmap;
 use std::fs::File;
 use std::io::{Read, Seek, SeekFrom};
 use std::str::FromStr;
-
 use thiserror::Error;
 use uuid::Uuid;
 use vm_memory::{ByteValued, Bytes, GuestAddress, GuestMemoryError};
 
-use crate::GuestMemoryMmap;
-
 #[derive(Error, Debug)]
 pub enum TdvfError {
-    #[error("Failed read TDVF descriptor")]
+    #[error("Failed read TDVF descriptor: {0}")]
     ReadDescriptor(#[source] std::io::Error),
-    #[error("Failed read TDVF descriptor offset")]
+    #[error("Failed read TDVF descriptor offset: {0}")]
     ReadDescriptorOffset(#[source] std::io::Error),
-    #[error("Failed read GUID table")]
+    #[error("Failed read GUID table: {0}")]
     ReadGuidTable(#[source] std::io::Error),
     #[error("Invalid descriptor signature")]
     InvalidDescriptorSignature,
@@ -25,9 +23,9 @@ pub enum TdvfError {
     InvalidDescriptorSize,
     #[error("Invalid descriptor version")]
     InvalidDescriptorVersion,
-    #[error("Failed to write HOB details to guest memory")]
+    #[error("Failed to write HOB details to guest memory: {0}")]
     GuestMemoryWriteHob(#[source] GuestMemoryError),
-    #[error("Failed to create Uuid")]
+    #[error("Failed to create Uuid: {0}")]
     UuidCreation(#[source] uuid::Error),
 }
 
@@ -35,7 +33,7 @@ const TABLE_FOOTER_GUID: &str = "96b582de-1fb2-45f7-baea-a366c55a082d";
 const TDVF_METADATA_OFFSET_GUID: &str = "e47a6535-984a-4798-865e-4685a7bf8ec2";
 
 // TDVF_DESCRIPTOR
-#[repr(C, packed)]
+#[repr(packed)]
 #[derive(Default)]
 pub struct TdvfDescriptor {
     signature: [u8; 4],
@@ -45,7 +43,7 @@ pub struct TdvfDescriptor {
 }
 
 // TDVF_SECTION
-#[repr(C, packed)]
+#[repr(packed)]
 #[derive(Clone, Copy, Default, Debug)]
 pub struct TdvfSection {
     pub data_offset: u32,
@@ -209,7 +207,7 @@ enum HobType {
     EndOfHobList = 0xffff,
 }
 
-#[repr(C, packed)]
+#[repr(C)]
 #[derive(Copy, Clone, Default, Debug)]
 struct HobHeader {
     r#type: HobType,
@@ -217,7 +215,7 @@ struct HobHeader {
     reserved: u32,
 }
 
-#[repr(C, packed)]
+#[repr(C)]
 #[derive(Copy, Clone, Default, Debug)]
 struct HobHandoffInfoTable {
     header: HobHeader,
@@ -230,7 +228,7 @@ struct HobHandoffInfoTable {
     efi_end_of_hob_list: u64,
 }
 
-#[repr(C, packed)]
+#[repr(C)]
 #[derive(Copy, Clone, Default, Debug)]
 struct EfiGuid {
     data1: u32,
@@ -239,7 +237,7 @@ struct EfiGuid {
     data4: [u8; 8],
 }
 
-#[repr(C, packed)]
+#[repr(C)]
 #[derive(Copy, Clone, Default, Debug)]
 struct HobResourceDescriptor {
     header: HobHeader,
@@ -250,7 +248,7 @@ struct HobResourceDescriptor {
     resource_length: u64,
 }
 
-#[repr(C, packed)]
+#[repr(C)]
 #[derive(Copy, Clone, Default, Debug)]
 struct HobGuidType {
     header: HobHeader,
@@ -266,14 +264,14 @@ pub enum PayloadImageType {
     RawVmLinux,
 }
 
-#[repr(C, packed)]
+#[repr(C)]
 #[derive(Copy, Clone, Default, Debug)]
 pub struct PayloadInfo {
     pub image_type: PayloadImageType,
     pub entry_point: u64,
 }
 
-#[repr(C, packed)]
+#[repr(C)]
 #[derive(Copy, Clone, Default, Debug)]
 struct TdPayload {
     guid_type: HobGuidType,
@@ -299,7 +297,7 @@ pub struct TdHob {
 }
 
 fn align_hob(v: u64) -> u64 {
-    v.div_ceil(8) * 8
+    (v + 7) / 8 * 8
 }
 
 impl TdHob {

block/Cargo.toml

@@ -1,30 +1,27 @@
 [package]
-authors = ["The Chromium OS Authors", "The Cloud Hypervisor Authors"]
-edition.workspace = true
 name = "block"
 version = "0.1.0"
+edition = "2021"
+authors = ["The Cloud Hypervisor Authors", "The Chromium OS Authors"]
 
 [features]
 default = []
 io_uring = ["dep:io-uring"]
 
 [dependencies]
-byteorder = { workspace = true }
-crc-any = "2.5.0"
-io-uring = { version = "0.7.10", optional = true }
-libc = { workspace = true }
-log = { workspace = true }
-remain = "0.2.15"
-serde = { workspace = true, features = ["derive"] }
-smallvec = "1.15.1"
-thiserror = { workspace = true }
-uuid = { workspace = true, features = ["v4"] }
-virtio-bindings = { workspace = true }
-virtio-queue = { workspace = true }
-vm-memory = { workspace = true, features = [
-  "backend-atomic",
-  "backend-bitmap",
-  "backend-mmap",
-] }
+byteorder = "1.4.3"
+crc-any = "2.4.4"
+io-uring = { version = "0.6.2", optional = true }
+libc = "0.2.147"
+log = "0.4.20"
+remain = "0.2.11"
+smallvec = "1.11.0"
+thiserror = "1.0.40"
+uuid = { version = "1.3.4", features = ["v4"] }
+versionize = "0.2.0"
+versionize_derive = "0.1.6"
+virtio-bindings = { version = "0.2.0", features = ["virtio-v5_0_0"] }
+virtio-queue = "0.11.0"
+vm-memory = { version = "0.14.0", features = ["backend-mmap", "backend-atomic", "backend-bitmap"] }
 vm-virtio = { path = "../vm-virtio" }
-vmm-sys-util = { workspace = true }
+vmm-sys-util = "0.12.1"

block/src/async_io.rs

@@ -2,86 +2,41 @@
 //
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
-use std::marker::PhantomData;
-use std::os::fd::{AsRawFd, OwnedFd, RawFd};
-
+use crate::DiskTopology;
 use thiserror::Error;
 use vmm_sys_util::eventfd::EventFd;
 
-use crate::{BatchRequest, DiskTopology};
-
 #[derive(Error, Debug)]
 pub enum DiskFileError {
     /// Failed getting disk file size.
-    #[error("Failed getting disk file size")]
+    #[error("Failed getting disk file size: {0}")]
     Size(#[source] std::io::Error),
     /// Failed creating a new AsyncIo.
-    #[error("Failed creating a new AsyncIo")]
+    #[error("Failed creating a new AsyncIo: {0}")]
     NewAsyncIo(#[source] std::io::Error),
 }
 
 pub type DiskFileResult<T> = std::result::Result<T, DiskFileError>;
 
-/// A wrapper for [`RawFd`] capturing the lifetime of a corresponding [`DiskFile`].
-///
-/// This fulfills the same role as [`BorrowedFd`] but is tailored to the limitations
-/// by some implementations of [`DiskFile`], which wrap the effective [`File`]
-/// in an `Arc<Mutex<T>>`, making the use of [`BorrowedFd`] impossible.
-///
-/// [`BorrowedFd`]: std::os::fd::BorrowedFd
-#[derive(Copy, Clone, Debug)]
-pub struct BorrowedDiskFd<'fd> {
-    raw_fd: RawFd,
-    _lifetime: PhantomData<&'fd OwnedFd>,
-}
-
-impl BorrowedDiskFd<'_> {
-    pub(super) fn new(raw_fd: RawFd) -> Self {
-        Self {
-            raw_fd,
-            _lifetime: PhantomData,
-        }
-    }
-}
-
-impl AsRawFd for BorrowedDiskFd<'_> {
-    fn as_raw_fd(&self) -> RawFd {
-        self.raw_fd
-    }
-}
-
-/// Abstraction over the effective [`File`] backing up a block device,
-/// with support for synchronous and asynchronous I/O.
-///
-/// This allows abstracting over raw image formats as well as structured
-/// image formats.
 pub trait DiskFile: Send {
     fn size(&mut self) -> DiskFileResult<u64>;
     fn new_async_io(&self, ring_depth: u32) -> DiskFileResult<Box<dyn AsyncIo>>;
     fn topology(&mut self) -> DiskTopology {
         DiskTopology::default()
     }
-    /// Returns the file descriptor of the underlying disk image file.
-    ///
-    /// The file descriptor is supposed to be used for `fcntl()` calls but no
-    /// other operation.
-    fn fd(&mut self) -> BorrowedDiskFd<'_>;
 }
 
 #[derive(Error, Debug)]
 pub enum AsyncIoError {
     /// Failed vectored reading from file.
-    #[error("Failed vectored reading from file")]
+    #[error("Failed vectored reading from file: {0}")]
     ReadVectored(#[source] std::io::Error),
     /// Failed vectored writing to file.
-    #[error("Failed vectored writing to file")]
+    #[error("Failed vectored writing to file: {0}")]
     WriteVectored(#[source] std::io::Error),
     /// Failed synchronizing file.
-    #[error("Failed synchronizing file")]
+    #[error("Failed synchronizing file: {0}")]
     Fsync(#[source] std::io::Error),
-    /// Failed submitting batch requests.
-    #[error("Failed submitting batch requests: {0}")]
-    SubmitBatchRequests(#[source] std::io::Error),
 }
 
 pub type AsyncIoResult<T> = std::result::Result<T, AsyncIoError>;
@@ -102,10 +57,4 @@ pub trait AsyncIo: Send {
     ) -> AsyncIoResult<()>;
     fn fsync(&mut self, user_data: Option<u64>) -> AsyncIoResult<()>;
     fn next_completed_request(&mut self) -> Option<(u64, i32)>;
-    fn batch_requests_enabled(&self) -> bool {
-        false
-    }
-    fn submit_batch_requests(&mut self, _batch_request: &[BatchRequest]) -> AsyncIoResult<()> {
-        Ok(())
-    }
 }

block/src/fcntl.rs

@@ -1,173 +0,0 @@
-// Copyright © 2025 Cyberus Technology GmbH
-//
-// SPDX-License-Identifier: Apache-2.0
-//
-
-//! Helpers for advisory file locking.
-//!
-//! Under the hood, the implementation uses OFD locks for the entire file,
-//! as described in [[0]]. The advantage over `F_SETLKW` (currently used by
-//! Rust std: `File::try_lock()`) is that only the very last `close()` on a
-//! file descriptor releases the lock. This prevents mistakes and unexpected
-//! behavior.
-//!
-//! [0]: <https://apenwarr.ca/log/20101213>.
-
-use std::fmt::Debug;
-use std::io;
-use std::os::fd::{AsRawFd, RawFd};
-
-use thiserror::Error;
-
-/// Errors that can happen when working with file locks.
-#[derive(Error, Debug)]
-pub enum LockError {
-    /// The file is already locked.
-    ///
-    /// A call to [`get_lock_state`] can help to identify the reason.
-    #[error("The file is already locked")]
-    AlreadyLocked,
-    /// IO error.
-    #[error("The lock state could not be checked or set")]
-    Io(#[source] io::Error),
-}
-
-/// Commands for use with [`fcntl`].
-#[allow(non_camel_case_types)]
-enum FcntlArg<'a> {
-    /// Set an OFD lock from the given lock description.
-    F_OFD_SETLK(&'a libc::flock),
-    /// Get the first OFD lock for the given lock description.
-    F_OFD_GETLK(&'a mut libc::flock),
-}
-
-/// Wrapper for [`libc::fcntl`] that properly sets the function arguments.
-fn fcntl(fd: RawFd, arg: FcntlArg) -> libc::c_int {
-    // SAFETY: We use a valid FD.
-    unsafe {
-        match arg {
-            FcntlArg::F_OFD_SETLK(flock) => libc::fcntl(fd, libc::F_OFD_SETLK, flock),
-            FcntlArg::F_OFD_GETLK(flock) => libc::fcntl(fd, libc::F_OFD_GETLK, flock),
-        }
-    }
-}
-
-/// Describes the type of lock you want to set.
-#[derive(Clone, Copy, Debug)]
-pub enum LockType {
-    /// Clear a lock.
-    Unlock,
-    /// Set a write lock (exclusive).
-    Write,
-    /// Set a read lock (shared).
-    Read,
-}
-
-impl LockType {
-    pub const fn to_libc_val(self) -> libc::c_int {
-        match self {
-            Self::Unlock => libc::F_UNLCK as libc::c_int,
-            Self::Write => libc::F_WRLCK as libc::c_int,
-            Self::Read => libc::F_RDLCK as libc::c_int,
-        }
-    }
-}
-
-/// Describes the current state of a lock.
-#[derive(Debug)]
-pub enum LockState {
-    /// No lock set.
-    Unlocked,
-    /// Locked for reading (non-exclusive).
-    SharedRead,
-    /// Locked for writing (exclusive mode).
-    ExclusiveWrite,
-}
-
-impl LockState {
-    fn new(value: libc::c_int) -> Self {
-        const F_UNLCK: libc::c_int = libc::F_UNLCK as libc::c_int;
-        const F_WRLCK: libc::c_int = libc::F_WRLCK as libc::c_int;
-        const F_RDLCK: libc::c_int = libc::F_RDLCK as libc::c_int;
-        match value {
-            F_UNLCK => Self::Unlocked,
-            F_WRLCK => Self::ExclusiveWrite,
-            F_RDLCK => Self::SharedRead,
-            // This is so unlikely that we want to avoid the complexity of
-            // coping with this error case. Can only fail if either Linux
-            // is broken or memory is messed up.
-            other => panic!("Unexpected lock state: {other}"),
-        }
-    }
-}
-
-/// Returns a [`struct@libc::flock`] structure for the whole file.
-const fn get_flock(lock_type: LockType) -> libc::flock {
-    libc::flock {
-        l_type: lock_type.to_libc_val() as libc::c_short,
-        l_whence: libc::SEEK_SET as libc::c_short,
-        l_start: 0,
-        l_len: 0, /* EOF */
-        l_pid: 0, /* filled by callee */
-    }
-}
-
-/// Tries to acquire a lock using [`fcntl`] with respect to the given
-/// parameters.
-///
-/// Please note that `fcntl()` OFD locks are **advisory locks**, which do not
-/// prevent to `open()` a file if a lock is already placed.
-///
-/// # Parameters
-/// - `file`: The file to acquire a lock for [`LockType`]. The file's state will
-///   be logically mutated, but not technically.
-/// - `lock_type`: The [`LockType`]
-pub fn try_acquire_lock<Fd: AsRawFd>(file: Fd, lock_type: LockType) -> Result<(), LockError> {
-    let flock = get_flock(lock_type);
-
-    let res = fcntl(file.as_raw_fd(), FcntlArg::F_OFD_SETLK(&flock));
-    match res {
-        0 => Ok(()),
-        -1 => {
-            let io_error = io::Error::last_os_error();
-            let errno = io_error.raw_os_error().unwrap();
-            match errno {
-                // See man page for error code:
-                // <https://man7.org/linux/man-pages/man2/fcntl.2.html>
-                libc::EAGAIN | libc::EACCES => Err(LockError::AlreadyLocked),
-                _ => Err(LockError::Io(io_error)),
-            }
-        }
-        val => panic!("Unexpected return value from fcntl(): {val}"),
-    }
-}
-
-/// Clears a lock.
-///
-/// # Parameters
-/// - `file`: The file to clear all locks for [`LockType`].
-pub fn clear_lock<Fd: AsRawFd>(file: Fd) -> Result<(), LockError> {
-    try_acquire_lock(file, LockType::Unlock)
-}
-
-/// Returns the current lock state using [`fcntl`] with respect to the given
-/// parameters.
-///
-/// # Parameters
-/// - `file`: The file for which to get the lock state.
-pub fn get_lock_state<Fd: AsRawFd>(file: Fd) -> Result<LockState, LockError> {
-    let mut flock = get_flock(LockType::Write);
-    let res = fcntl(file.as_raw_fd(), FcntlArg::F_OFD_GETLK(&mut flock));
-    match res {
-        0 => {
-            let state = flock.l_type as libc::c_int;
-            let state = LockState::new(state);
-            Ok(state)
-        }
-        -1 => {
-            let io_error = io::Error::last_os_error();
-            Err(LockError::Io(io_error))
-        }
-        val => panic!("Unexpected return value from fcntl(): {val}"),
-    }
-}

block/src/fixed_vhd.rs

@@ -2,13 +2,12 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+use crate::vhd::VhdFooter;
+use crate::BlockBackend;
 use std::fs::File;
 use std::io::{Read, Seek, SeekFrom, Write};
 use std::os::unix::io::{AsRawFd, RawFd};
 
-use crate::BlockBackend;
-use crate::vhd::VhdFooter;
-
 #[derive(Debug)]
 pub struct FixedVhd {
     file: File,

block/src/fixed_vhd_async.rs

@@ -2,17 +2,15 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
-use std::fs::File;
-use std::os::unix::io::{AsRawFd, RawFd};
-
-use vmm_sys_util::eventfd::EventFd;
-
 use crate::async_io::{
-    AsyncIo, AsyncIoError, AsyncIoResult, BorrowedDiskFd, DiskFile, DiskFileError, DiskFileResult,
+    AsyncIo, AsyncIoError, AsyncIoResult, DiskFile, DiskFileError, DiskFileResult,
 };
 use crate::fixed_vhd::FixedVhd;
 use crate::raw_async::RawFileAsync;
-use crate::{BatchRequest, BlockBackend};
+use crate::BlockBackend;
+use std::fs::File;
+use std::os::unix::io::{AsRawFd, RawFd};
+use vmm_sys_util::eventfd::EventFd;
 
 pub struct FixedVhdDiskAsync(FixedVhd);
 
@@ -33,10 +31,6 @@ impl DiskFile for FixedVhdDiskAsync {
                 .map_err(DiskFileError::NewAsyncIo)?,
         ) as Box<dyn AsyncIo>)
     }
-
-    fn fd(&mut self) -> BorrowedDiskFd<'_> {
-        BorrowedDiskFd::new(self.0.as_raw_fd())
-    }
 }
 
 pub struct FixedVhdAsync {
@@ -106,12 +100,4 @@ impl AsyncIo for FixedVhdAsync {
     fn next_completed_request(&mut self) -> Option<(u64, i32)> {
         self.raw_file_async.next_completed_request()
     }
-
-    fn batch_requests_enabled(&self) -> bool {
-        true
-    }
-
-    fn submit_batch_requests(&mut self, batch_request: &[BatchRequest]) -> AsyncIoResult<()> {
-        self.raw_file_async.submit_batch_requests(batch_request)
-    }
 }

block/src/fixed_vhd_sync.rs

@@ -2,17 +2,15 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
-use std::fs::File;
-use std::os::unix::io::{AsRawFd, RawFd};
-
-use vmm_sys_util::eventfd::EventFd;
-
-use crate::BlockBackend;
 use crate::async_io::{
-    AsyncIo, AsyncIoError, AsyncIoResult, BorrowedDiskFd, DiskFile, DiskFileError, DiskFileResult,
+    AsyncIo, AsyncIoError, AsyncIoResult, DiskFile, DiskFileError, DiskFileResult,
 };
 use crate::fixed_vhd::FixedVhd;
 use crate::raw_sync::RawFileSync;
+use crate::BlockBackend;
+use std::fs::File;
+use std::os::unix::io::{AsRawFd, RawFd};
+use vmm_sys_util::eventfd::EventFd;
 
 pub struct FixedVhdDiskSync(FixedVhd);
 
@@ -33,10 +31,6 @@ impl DiskFile for FixedVhdDiskSync {
                 .map_err(DiskFileError::NewAsyncIo)?,
         ) as Box<dyn AsyncIo>)
     }
-
-    fn fd(&mut self) -> BorrowedDiskFd<'_> {
-        BorrowedDiskFd::new(self.0.as_raw_fd())
-    }
 }
 
 pub struct FixedVhdSync {

block/src/lib.rs

@@ -12,7 +12,6 @@
 extern crate log;
 
 pub mod async_io;
-pub mod fcntl;
 pub mod fixed_vhd;
 #[cfg(feature = "io_uring")]
 /// Enabled with the `"io_uring"` feature
@@ -31,36 +30,43 @@ pub mod vhd;
 pub mod vhdx;
 pub mod vhdx_sync;
 
-use std::alloc::{Layout, alloc_zeroed, dealloc};
+use crate::async_io::{AsyncIo, AsyncIoError, AsyncIoResult};
+use crate::fixed_vhd::FixedVhd;
+use crate::qcow::{QcowFile, RawFile};
+use crate::vhdx::{Vhdx, VhdxError};
+#[cfg(feature = "io_uring")]
+use io_uring::{opcode, IoUring, Probe};
+use libc::{ioctl, S_IFBLK, S_IFMT};
+use smallvec::SmallVec;
+use std::alloc::{alloc_zeroed, dealloc, Layout};
+use std::cmp;
 use std::collections::VecDeque;
+use std::convert::TryInto;
 use std::fmt::Debug;
 use std::fs::File;
 use std::io::{self, IoSlice, IoSliceMut, Read, Seek, SeekFrom, Write};
 use std::os::linux::fs::MetadataExt;
 use std::os::unix::io::AsRawFd;
 use std::path::Path;
+use std::result;
 use std::sync::Arc;
+use std::sync::MutexGuard;
 use std::time::Instant;
-use std::{cmp, result};
-
-#[cfg(feature = "io_uring")]
-use io_uring::{IoUring, Probe, opcode};
-use libc::{S_IFBLK, S_IFMT, ioctl};
-use serde::{Deserialize, Serialize};
-use smallvec::SmallVec;
 use thiserror::Error;
+use versionize::{VersionMap, Versionize, VersionizeResult};
+use versionize_derive::Versionize;
 use virtio_bindings::virtio_blk::*;
 use virtio_queue::DescriptorChain;
-use vm_memory::bitmap::Bitmap;
 use vm_memory::{
-    ByteValued, Bytes, GuestAddress, GuestMemory, GuestMemoryError, GuestMemoryLoadGuard,
+    bitmap::AtomicBitmap, bitmap::Bitmap, ByteValued, Bytes, GuestAddress, GuestMemory,
+    GuestMemoryError, GuestMemoryLoadGuard,
 };
 use vm_virtio::{AccessPlatform, Translatable};
+use vmm_sys_util::aio;
 use vmm_sys_util::eventfd::EventFd;
-use vmm_sys_util::{aio, ioctl_io_nr};
+use vmm_sys_util::{ioctl_io_nr, ioctl_ioc_nr};
 
-use crate::async_io::{AsyncIo, AsyncIoError, AsyncIoResult};
-use crate::vhdx::VhdxError;
+type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
 
 const SECTOR_SHIFT: u8 = 9;
 pub const SECTOR_SIZE: u64 = 0x01 << SECTOR_SHIFT;
@@ -68,9 +74,9 @@ pub const SECTOR_SIZE: u64 = 0x01 << SECTOR_SHIFT;
 #[derive(Error, Debug)]
 pub enum Error {
     #[error("Guest gave us bad memory addresses")]
-    GuestMemory(#[source] GuestMemoryError),
+    GuestMemory(GuestMemoryError),
     #[error("Guest gave us offsets that would have overflowed a usize")]
-    CheckedOffset(GuestAddress, usize /* sector offset */),
+    CheckedOffset(GuestAddress, usize),
     #[error("Guest gave us a write only descriptor that protocol says to read from")]
     UnexpectedWriteOnlyDescriptor,
     #[error("Guest gave us a read only descriptor that protocol says to write to")]
@@ -79,22 +85,22 @@ pub enum Error {
     DescriptorChainTooShort,
     #[error("Guest gave us a descriptor that was too short to use")]
     DescriptorLengthTooSmall,
-    #[error("Failed to detect image type")]
-    DetectImageType(#[source] std::io::Error),
-    #[error("Failure in fixed vhd")]
-    FixedVhdError(#[source] std::io::Error),
+    #[error("Failed to detect image type: {0}")]
+    DetectImageType(std::io::Error),
+    #[error("Failure in fixed vhd: {0}")]
+    FixedVhdError(std::io::Error),
     #[error("Getting a block's metadata fails for any reason")]
     GetFileMetadata,
     #[error("The requested operation would cause a seek beyond disk end")]
     InvalidOffset,
-    #[error("Failure in qcow")]
-    QcowError(#[source] qcow::Error),
-    #[error("Failure in raw file")]
-    RawFileError(#[source] std::io::Error),
+    #[error("Failure in qcow: {0}")]
+    QcowError(qcow::Error),
+    #[error("Failure in raw file: {0}")]
+    RawFileError(std::io::Error),
     #[error("The requested operation does not support multiple descriptors")]
     TooManyDescriptors,
-    #[error("Failure in vhdx")]
-    VhdxError(#[source] VhdxError),
+    #[error("Failure in vhdx: {0}")]
+    VhdxError(VhdxError),
 }
 
 fn build_device_id(disk_path: &Path) -> result::Result<String, Error> {
@@ -131,46 +137,43 @@ pub fn build_serial(disk_path: &Path) -> Vec<u8> {
 
 #[derive(Error, Debug)]
 pub enum ExecuteError {
-    #[error("Bad request")]
-    BadRequest(#[source] Error),
-    #[error("Failed to flush")]
-    Flush(#[source] io::Error),
-    #[error("Failed to read")]
-    Read(#[source] GuestMemoryError),
-    #[error("Failed to read_exact")]
-    ReadExact(#[source] io::Error),
-    #[error("Can't execute an operation other than `read` on a read-only device")]
-    ReadOnly,
-    #[error("Failed to seek")]
-    Seek(#[source] io::Error),
-    #[error("Failed to write")]
-    Write(#[source] GuestMemoryError),
-    #[error("Failed to write_all")]
-    WriteAll(#[source] io::Error),
+    #[error("Bad request: {0}")]
+    BadRequest(Error),
+    #[error("Failed to flush: {0}")]
+    Flush(io::Error),
+    #[error("Failed to read: {0}")]
+    Read(GuestMemoryError),
+    #[error("Failed to read_exact: {0}")]
+    ReadExact(io::Error),
+    #[error("Failed to seek: {0}")]
+    Seek(io::Error),
+    #[error("Failed to write: {0}")]
+    Write(GuestMemoryError),
+    #[error("Failed to write_all: {0}")]
+    WriteAll(io::Error),
     #[error("Unsupported request: {0}")]
     Unsupported(u32),
-    #[error("Failed to submit io uring")]
-    SubmitIoUring(#[source] io::Error),
-    #[error("Failed to get guest address")]
-    GetHostAddress(#[source] GuestMemoryError),
-    #[error("Failed to async read")]
-    AsyncRead(#[source] AsyncIoError),
-    #[error("Failed to async write")]
-    AsyncWrite(#[source] AsyncIoError),
-    #[error("failed to async flush")]
-    AsyncFlush(#[source] AsyncIoError),
-    #[error("Failed allocating a temporary buffer")]
-    TemporaryBufferAllocation(#[source] io::Error),
+    #[error("Failed to submit io uring: {0}")]
+    SubmitIoUring(io::Error),
+    #[error("Failed to get guest address: {0}")]
+    GetHostAddress(GuestMemoryError),
+    #[error("Failed to async read: {0}")]
+    AsyncRead(AsyncIoError),
+    #[error("Failed to async write: {0}")]
+    AsyncWrite(AsyncIoError),
+    #[error("failed to async flush: {0}")]
+    AsyncFlush(AsyncIoError),
+    #[error("Failed allocating a temporary buffer: {0}")]
+    TemporaryBufferAllocation(io::Error),
 }
 
 impl ExecuteError {
-    pub fn status(&self) -> u8 {
-        let status = match *self {
+    pub fn status(&self) -> u32 {
+        match *self {
             ExecuteError::BadRequest(_) => VIRTIO_BLK_S_IOERR,
             ExecuteError::Flush(_) => VIRTIO_BLK_S_IOERR,
             ExecuteError::Read(_) => VIRTIO_BLK_S_IOERR,
             ExecuteError::ReadExact(_) => VIRTIO_BLK_S_IOERR,
-            ExecuteError::ReadOnly => VIRTIO_BLK_S_IOERR,
             ExecuteError::Seek(_) => VIRTIO_BLK_S_IOERR,
             ExecuteError::Write(_) => VIRTIO_BLK_S_IOERR,
             ExecuteError::WriteAll(_) => VIRTIO_BLK_S_IOERR,
@@ -181,8 +184,7 @@ impl ExecuteError {
             ExecuteError::AsyncWrite(_) => VIRTIO_BLK_S_IOERR,
             ExecuteError::AsyncFlush(_) => VIRTIO_BLK_S_IOERR,
             ExecuteError::TemporaryBufferAllocation(_) => VIRTIO_BLK_S_IOERR,
-        };
-        status as u8
+        }
     }
 }
 
@@ -195,8 +197,8 @@ pub enum RequestType {
     Unsupported(u32),
 }
 
-pub fn request_type<B: Bitmap + 'static>(
-    mem: &vm_memory::GuestMemoryMmap<B>,
+pub fn request_type(
+    mem: &GuestMemoryMmap,
     desc_addr: GuestAddress,
 ) -> result::Result<RequestType, Error> {
     let type_ = mem.read_obj(desc_addr).map_err(Error::GuestMemory)?;
@@ -209,10 +211,7 @@ pub fn request_type<B: Bitmap + 'static>(
     }
 }
 
-fn sector<B: Bitmap + 'static>(
-    mem: &vm_memory::GuestMemoryMmap<B>,
-    desc_addr: GuestAddress,
-) -> result::Result<u64, Error> {
+fn sector(mem: &GuestMemoryMmap, desc_addr: GuestAddress) -> result::Result<u64, Error> {
     const SECTOR_OFFSET: usize = 8;
     let addr = match mem.checked_offset(desc_addr, SECTOR_OFFSET) {
         Some(v) => v,
@@ -222,8 +221,6 @@ fn sector<B: Bitmap + 'static>(
     mem.read_obj(addr).map_err(Error::GuestMemory)
 }
 
-const DEFAULT_DESCRIPTOR_VEC_SIZE: usize = 32;
-
 #[derive(Debug)]
 pub struct AlignedOperation {
     origin_ptr: u64,
@@ -232,41 +229,28 @@ pub struct AlignedOperation {
     layout: Layout,
 }
 
-pub struct BatchRequest {
-    pub offset: libc::off_t,
-    pub iovecs: SmallVec<[libc::iovec; DEFAULT_DESCRIPTOR_VEC_SIZE]>,
-    pub user_data: u64,
-    pub request_type: RequestType,
-}
-
-pub struct ExecuteAsync {
-    // `true` if the execution will complete asynchronously
-    pub async_complete: bool,
-    // request need to be batched for submission if any
-    pub batch_request: Option<BatchRequest>,
-}
-
 #[derive(Debug)]
 pub struct Request {
     pub request_type: RequestType,
     pub sector: u64,
-    pub data_descriptors: SmallVec<[(GuestAddress, u32); DEFAULT_DESCRIPTOR_VEC_SIZE]>,
+    pub data_descriptors: SmallVec<[(GuestAddress, u32); 1]>,
     pub status_addr: GuestAddress,
     pub writeback: bool,
-    pub aligned_operations: SmallVec<[AlignedOperation; DEFAULT_DESCRIPTOR_VEC_SIZE]>,
+    pub aligned_operations: SmallVec<[AlignedOperation; 1]>,
     pub start: Instant,
 }
 
 impl Request {
-    pub fn parse<B: Bitmap + 'static>(
-        desc_chain: &mut DescriptorChain<GuestMemoryLoadGuard<vm_memory::GuestMemoryMmap<B>>>,
+    pub fn parse(
+        desc_chain: &mut DescriptorChain<GuestMemoryLoadGuard<GuestMemoryMmap>>,
         access_platform: Option<&Arc<dyn AccessPlatform>>,
     ) -> result::Result<Request, Error> {
         let hdr_desc = desc_chain
             .next()
             .ok_or(Error::DescriptorChainTooShort)
-            .inspect_err(|_| {
+            .map_err(|e| {
                 error!("Missing head descriptor");
+                e
             })?;
 
         // The head contains the request type which MUST be readable.
@@ -281,10 +265,10 @@ impl Request {
         let mut req = Request {
             request_type: request_type(desc_chain.memory(), hdr_desc_addr)?,
             sector: sector(desc_chain.memory(), hdr_desc_addr)?,
-            data_descriptors: SmallVec::with_capacity(DEFAULT_DESCRIPTOR_VEC_SIZE),
+            data_descriptors: SmallVec::with_capacity(1),
             status_addr: GuestAddress(0),
             writeback: true,
-            aligned_operations: SmallVec::with_capacity(DEFAULT_DESCRIPTOR_VEC_SIZE),
+            aligned_operations: SmallVec::with_capacity(1),
             start: Instant::now(),
         };
 
@@ -292,8 +276,9 @@ impl Request {
         let mut desc = desc_chain
             .next()
             .ok_or(Error::DescriptorChainTooShort)
-            .inspect_err(|_| {
+            .map_err(|e| {
                 error!("Only head descriptor present: request = {:?}", req);
+                e
             })?;
 
         if !desc.has_next() {
@@ -324,8 +309,9 @@ impl Request {
                 desc = desc_chain
                     .next()
                     .ok_or(Error::DescriptorChainTooShort)
-                    .inspect_err(|_| {
+                    .map_err(|e| {
                         error!("DescriptorChain corrupted: request = {:?}", req);
+                        e
                     })?;
             }
             status_desc = desc;
@@ -347,11 +333,11 @@ impl Request {
         Ok(req)
     }
 
-    pub fn execute<T: Seek + Read + Write, B: Bitmap + 'static>(
+    pub fn execute<T: Seek + Read + Write>(
         &self,
         disk: &mut T,
         disk_nsectors: u64,
-        mem: &vm_memory::GuestMemoryMmap<B>,
+        mem: &GuestMemoryMmap,
         serial: &[u8],
     ) -> result::Result<u32, ExecuteError> {
         disk.seek(SeekFrom::Start(self.sector << SECTOR_SHIFT))
@@ -404,34 +390,28 @@ impl Request {
         Ok(len)
     }
 
-    pub fn execute_async<B: Bitmap + 'static>(
+    pub fn execute_async(
         &mut self,
-        mem: &vm_memory::GuestMemoryMmap<B>,
+        mem: &GuestMemoryMmap,
         disk_nsectors: u64,
         disk_image: &mut dyn AsyncIo,
         serial: &[u8],
         user_data: u64,
-    ) -> result::Result<ExecuteAsync, ExecuteError> {
+    ) -> result::Result<bool, ExecuteError> {
         let sector = self.sector;
         let request_type = self.request_type;
         let offset = (sector << SECTOR_SHIFT) as libc::off_t;
 
-        let mut iovecs: SmallVec<[libc::iovec; DEFAULT_DESCRIPTOR_VEC_SIZE]> =
+        let mut iovecs: SmallVec<[libc::iovec; 1]> =
             SmallVec::with_capacity(self.data_descriptors.len());
-        for &(data_addr, data_len) in &self.data_descriptors {
-            let _: u32 = data_len; // compiler-checked documentation
-            const _: () = assert!(
-                core::mem::size_of::<u32>() <= core::mem::size_of::<usize>(),
-                "unsupported platform"
-            );
-            if data_len == 0 {
+        for (data_addr, data_len) in &self.data_descriptors {
+            if *data_len == 0 {
                 continue;
             }
-            let mut top: u64 = u64::from(data_len) / SECTOR_SIZE;
-            if u64::from(data_len) % SECTOR_SIZE != 0 {
+            let mut top: u64 = u64::from(*data_len) / SECTOR_SIZE;
+            if u64::from(*data_len) % SECTOR_SIZE != 0 {
                 top += 1;
             }
-            let data_len = data_len as usize;
             top = top
                 .checked_add(sector)
                 .ok_or(ExecuteError::BadRequest(Error::InvalidOffset))?;
@@ -440,7 +420,7 @@ impl Request {
             }
 
             let origin_ptr = mem
-                .get_slice(data_addr, data_len)
+                .get_slice(*data_addr, *data_len as usize)
                 .map_err(ExecuteError::GetHostAddress)?
                 .ptr_guard();
 
@@ -448,8 +428,9 @@ impl Request {
             // In case it's not properly aligned, an intermediate buffer is
             // created with the correct alignment, and a copy from/to the
             // origin buffer is performed, depending on the type of operation.
-            let iov_base = if !(origin_ptr.as_ptr() as u64).is_multiple_of(SECTOR_SIZE) {
-                let layout = Layout::from_size_align(data_len, SECTOR_SIZE as usize).unwrap();
+            let iov_base = if (origin_ptr.as_ptr() as u64) % SECTOR_SIZE != 0 {
+                let layout =
+                    Layout::from_size_align(*data_len as usize, SECTOR_SIZE as usize).unwrap();
                 // SAFETY: layout has non-zero size
                 let aligned_ptr = unsafe { alloc_zeroed(layout) };
                 if aligned_ptr.is_null() {
@@ -463,7 +444,7 @@ impl Request {
                 if request_type == RequestType::Out {
                     // SAFETY: destination buffer has been allocated with
                     // the proper size.
-                    unsafe { std::ptr::copy(origin_ptr.as_ptr(), aligned_ptr, data_len) };
+                    unsafe { std::ptr::copy(origin_ptr.as_ptr(), aligned_ptr, *data_len as usize) };
                 }
 
                 // Store both origin and aligned pointers for complete_async()
@@ -471,7 +452,7 @@ impl Request {
                 self.aligned_operations.push(AlignedOperation {
                     origin_ptr: origin_ptr.as_ptr() as u64,
                     aligned_ptr: aligned_ptr as u64,
-                    size: data_len,
+                    size: *data_len as usize,
                     layout,
                 });
 
@@ -482,15 +463,11 @@ impl Request {
 
             let iovec = libc::iovec {
                 iov_base,
-                iov_len: data_len as libc::size_t,
+                iov_len: *data_len as libc::size_t,
             };
             iovecs.push(iovec);
         }
 
-        let mut ret = ExecuteAsync {
-            async_complete: true,
-            batch_request: None,
-        };
         // Queue operations expected to be submitted.
         match request_type {
             RequestType::In => {
@@ -500,32 +477,14 @@ impl Request {
                         .bitmap()
                         .mark_dirty(0, *data_len as usize);
                 }
-                if disk_image.batch_requests_enabled() {
-                    ret.batch_request = Some(BatchRequest {
-                        offset,
-                        iovecs,
-                        user_data,
-                        request_type,
-                    });
-                } else {
-                    disk_image
-                        .read_vectored(offset, &iovecs, user_data)
-                        .map_err(ExecuteError::AsyncRead)?;
-                }
+                disk_image
+                    .read_vectored(offset, &iovecs, user_data)
+                    .map_err(ExecuteError::AsyncRead)?;
             }
             RequestType::Out => {
-                if disk_image.batch_requests_enabled() {
-                    ret.batch_request = Some(BatchRequest {
-                        offset,
-                        iovecs,
-                        user_data,
-                        request_type,
-                    });
-                } else {
-                    disk_image
-                        .write_vectored(offset, &iovecs, user_data)
-                        .map_err(ExecuteError::AsyncWrite)?;
-                }
+                disk_image
+                    .write_vectored(offset, &iovecs, user_data)
+                    .map_err(ExecuteError::AsyncWrite)?;
             }
             RequestType::Flush => {
                 disk_image
@@ -543,13 +502,12 @@ impl Request {
                 }
                 mem.write_slice(serial, data_addr)
                     .map_err(ExecuteError::Write)?;
-                ret.async_complete = false;
-                return Ok(ret);
+                return Ok(false);
             }
             RequestType::Unsupported(t) => return Err(ExecuteError::Unsupported(t)),
         }
 
-        Ok(ret)
+        Ok(true)
     }
 
     pub fn complete_async(&mut self) -> result::Result<(), Error> {
@@ -587,7 +545,7 @@ impl Request {
     }
 }
 
-#[derive(Copy, Clone, Debug, Default, Serialize, Deserialize)]
+#[derive(Copy, Clone, Debug, Default, Versionize)]
 #[repr(C, packed)]
 pub struct VirtioBlockConfig {
     pub capacity: u64,
@@ -610,7 +568,7 @@ pub struct VirtioBlockConfig {
     pub write_zeroes_may_unmap: u8,
     pub unused1: [u8; 3],
 }
-#[derive(Copy, Clone, Debug, Default, Serialize, Deserialize)]
+#[derive(Copy, Clone, Debug, Default, Versionize)]
 #[repr(C, packed)]
 pub struct VirtioBlockGeometry {
     pub cylinders: u16,
@@ -686,7 +644,10 @@ pub fn block_io_uring_is_supported() -> bool {
     }
 }
 
-pub trait AsyncAdaptor {
+pub trait AsyncAdaptor<F>
+where
+    F: Read + Write + Seek,
+{
     fn read_vectored_sync(
         &mut self,
         offset: libc::off_t,
@@ -694,30 +655,24 @@ pub trait AsyncAdaptor {
         user_data: u64,
         eventfd: &EventFd,
         completion_list: &mut VecDeque<(u64, i32)>,
-    ) -> AsyncIoResult<()>
-    where
-        Self: Read + Seek,
-    {
+    ) -> AsyncIoResult<()> {
         // Convert libc::iovec into IoSliceMut
-        let mut slices: SmallVec<[IoSliceMut; DEFAULT_DESCRIPTOR_VEC_SIZE]> =
-            SmallVec::with_capacity(iovecs.len());
+        let mut slices: SmallVec<[IoSliceMut; 1]> = SmallVec::with_capacity(iovecs.len());
         for iovec in iovecs.iter() {
             // SAFETY: on Linux IoSliceMut wraps around libc::iovec
-            slices.push(IoSliceMut::new(unsafe {
-                std::mem::transmute::<libc::iovec, &mut [u8]>(*iovec)
-            }));
+            slices.push(IoSliceMut::new(unsafe { std::mem::transmute(*iovec) }));
         }
 
         let result = {
+            let mut file = self.file();
+
             // Move the cursor to the right offset
-            self.seek(SeekFrom::Start(offset as u64))
+            file.seek(SeekFrom::Start(offset as u64))
                 .map_err(AsyncIoError::ReadVectored)?;
 
-            let mut r = 0;
-            for b in slices.iter_mut() {
-                r += self.read(b).map_err(AsyncIoError::ReadVectored)?;
-            }
-            r
+            // Read vectored
+            file.read_vectored(slices.as_mut_slice())
+                .map_err(AsyncIoError::ReadVectored)?
         };
 
         completion_list.push_back((user_data, result as i32));
@@ -733,30 +688,24 @@ pub trait AsyncAdaptor {
         user_data: u64,
         eventfd: &EventFd,
         completion_list: &mut VecDeque<(u64, i32)>,
-    ) -> AsyncIoResult<()>
-    where
-        Self: Write + Seek,
-    {
+    ) -> AsyncIoResult<()> {
         // Convert libc::iovec into IoSlice
-        let mut slices: SmallVec<[IoSlice; DEFAULT_DESCRIPTOR_VEC_SIZE]> =
-            SmallVec::with_capacity(iovecs.len());
+        let mut slices: SmallVec<[IoSlice; 1]> = SmallVec::with_capacity(iovecs.len());
         for iovec in iovecs.iter() {
             // SAFETY: on Linux IoSlice wraps around libc::iovec
-            slices.push(IoSlice::new(unsafe {
-                std::mem::transmute::<libc::iovec, &mut [u8]>(*iovec)
-            }));
+            slices.push(IoSlice::new(unsafe { std::mem::transmute(*iovec) }));
         }
 
         let result = {
+            let mut file = self.file();
+
             // Move the cursor to the right offset
-            self.seek(SeekFrom::Start(offset as u64))
+            file.seek(SeekFrom::Start(offset as u64))
                 .map_err(AsyncIoError::WriteVectored)?;
 
-            let mut r = 0;
-            for b in slices.iter() {
-                r += self.write(b).map_err(AsyncIoError::WriteVectored)?;
-            }
-            r
+            // Write vectored
+            file.write_vectored(slices.as_slice())
+                .map_err(AsyncIoError::WriteVectored)?
         };
 
         completion_list.push_back((user_data, result as i32));
@@ -770,13 +719,12 @@ pub trait AsyncAdaptor {
         user_data: Option<u64>,
         eventfd: &EventFd,
         completion_list: &mut VecDeque<(u64, i32)>,
-    ) -> AsyncIoResult<()>
-    where
-        Self: Write,
-    {
+    ) -> AsyncIoResult<()> {
         let result: i32 = {
+            let mut file = self.file();
+
             // Flush
-            self.flush().map_err(AsyncIoError::Fsync)?;
+            file.flush().map_err(AsyncIoError::Fsync)?;
 
             0
         };
@@ -788,6 +736,8 @@ pub trait AsyncAdaptor {
 
         Ok(())
     }
+
+    fn file(&mut self) -> MutexGuard<F>;
 }
 
 pub enum ImageType {
@@ -839,6 +789,25 @@ pub trait BlockBackend: Read + Write + Seek + Send + Debug {
     fn size(&self) -> Result<u64, Error>;
 }
 
+/// Inspect the image file type and create an appropriate disk file to match it.
+pub fn create_disk_file(mut file: File, direct_io: bool) -> Result<Box<dyn BlockBackend>, Error> {
+    let image_type = detect_image_type(&mut file).map_err(Error::DetectImageType)?;
+
+    Ok(match image_type {
+        ImageType::Qcow2 => {
+            Box::new(QcowFile::from(RawFile::new(file, direct_io)).map_err(Error::QcowError)?)
+                as Box<dyn BlockBackend>
+        }
+        ImageType::FixedVhd => {
+            Box::new(FixedVhd::new(file).map_err(Error::FixedVhdError)?) as Box<dyn BlockBackend>
+        }
+        ImageType::Vhdx => {
+            Box::new(Vhdx::new(file).map_err(Error::VhdxError)?) as Box<dyn BlockBackend>
+        }
+        ImageType::Raw => Box::new(RawFile::new(file, direct_io)) as Box<dyn BlockBackend>,
+    })
+}
+
 #[derive(Debug)]
 pub struct DiskTopology {
     pub logical_block_size: u64,

block/src/qcow/mod.rs

@@ -1,127 +1,134 @@
 // Copyright 2018 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
-//
-// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
 mod qcow_raw_file;
 mod raw_file;
 mod refcount;
 mod vec_cache;
 
-use std::cmp::{max, min};
-use std::fs::OpenOptions;
-use std::io::{self, Read, Seek, SeekFrom, Write};
-use std::mem::size_of;
-use std::os::fd::{AsRawFd, RawFd};
-use std::str;
-
+use crate::qcow::{
+    qcow_raw_file::QcowRawFile,
+    refcount::RefCount,
+    vec_cache::{CacheMap, Cacheable, VecCache},
+};
+use crate::BlockBackend;
 use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
 use libc::{EINVAL, ENOSPC, ENOTSUP};
 use remain::sorted;
-use thiserror::Error;
-use vmm_sys_util::file_traits::{FileSetLen, FileSync};
-use vmm_sys_util::seek_hole::SeekHole;
-use vmm_sys_util::write_zeroes::{PunchHole, WriteZeroesAt};
+use std::cmp::{max, min};
+use std::fmt::{self, Display};
+use std::fs::OpenOptions;
+use std::io::{self, Read, Seek, SeekFrom, Write};
+use std::mem::size_of;
+use std::str;
+use vmm_sys_util::{
+    file_traits::FileSetLen, file_traits::FileSync, seek_hole::SeekHole, write_zeroes::PunchHole,
+    write_zeroes::WriteZeroesAt,
+};
 
-use crate::BlockBackend;
-use crate::qcow::qcow_raw_file::QcowRawFile;
 pub use crate::qcow::raw_file::RawFile;
-use crate::qcow::refcount::RefCount;
-use crate::qcow::vec_cache::{CacheMap, Cacheable, VecCache};
-
-/// Nesting depth limit for disk formats that can open other disk files.
-const MAX_NESTING_DEPTH: u32 = 10;
 
 #[sorted]
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
-    #[error("Backing file io error")]
-    BackingFileIo(#[source] io::Error),
-    #[error("Backing file open error")]
-    BackingFileOpen(#[source] Box<Error>),
-    #[error("Backing file name is too long: {0} bytes over")]
+    BackingFileIo(io::Error),
+    BackingFileOpen(Box<crate::Error>),
     BackingFileTooLong(usize),
-    #[error("Compressed blocks not supported")]
     CompressedBlocksNotSupported,
-    #[error("Failed to evict cache")]
-    EvictingCache(#[source] io::Error),
-    #[error("File larger than max of {MAX_QCOW_FILE_SIZE}: {0}")]
+    EvictingCache(io::Error),
     FileTooBig(u64),
-    #[error("Failed to get file size")]
-    GettingFileSize(#[source] io::Error),
-    #[error("Failed to get refcount")]
-    GettingRefcount(#[source] refcount::Error),
-    #[error("Failed to parse filename")]
-    InvalidBackingFileName(#[source] str::Utf8Error),
-    #[error("Invalid cluster index")]
+    GettingFileSize(io::Error),
+    GettingRefcount(refcount::Error),
+    InvalidBackingFileName(str::Utf8Error),
     InvalidClusterIndex,
-    #[error("Invalid cluster size")]
     InvalidClusterSize,
-    #[error("Invalid index")]
     InvalidIndex,
-    #[error("Invalid L1 table offset")]
     InvalidL1TableOffset,
-    #[error("Invalid L1 table size: {0}")]
     InvalidL1TableSize(u32),
-    #[error("Invalid magic")]
     InvalidMagic,
-    #[error("Invalid offset: {0}")]
     InvalidOffset(u64),
-    #[error("Invalid refcount table offset")]
     InvalidRefcountTableOffset,
-    #[error("Invalid refcount table size: {0}")]
     InvalidRefcountTableSize(u64),
-    #[error("Maximum disk nesting depth exceeded")]
-    MaxNestingDepthExceeded,
-    #[error("No free clusters")]
     NoFreeClusters,
-    #[error("No refcount clusters")]
     NoRefcountClusters,
-    #[error("Not enough space for refcounts")]
     NotEnoughSpaceForRefcounts,
-    #[error("Failed to open file {0}")]
-    OpeningFile(#[source] io::Error),
-    #[error("Failed to read data")]
-    ReadingData(#[source] io::Error),
-    #[error("Failed to read header")]
-    ReadingHeader(#[source] io::Error),
-    #[error("Failed to read pointers")]
-    ReadingPointers(#[source] io::Error),
-    #[error("Failed to read ref count block")]
-    ReadingRefCountBlock(#[source] refcount::Error),
-    #[error("Failed to read ref counts")]
-    ReadingRefCounts(#[source] io::Error),
-    #[error("Failed to rebuild ref counts")]
-    RebuildingRefCounts(#[source] io::Error),
-    #[error("Refcount table offset past file end")]
+    OpeningFile(io::Error),
+    ReadingData(io::Error),
+    ReadingHeader(io::Error),
+    ReadingPointers(io::Error),
+    ReadingRefCountBlock(refcount::Error),
+    ReadingRefCounts(io::Error),
+    RebuildingRefCounts(io::Error),
     RefcountTableOffEnd,
-    #[error("Too many clusters specified for refcount")]
     RefcountTableTooLarge,
-    #[error("Failed to seek file")]
-    SeekingFile(#[source] io::Error),
-    #[error("Failed to set file size")]
-    SettingFileSize(#[source] io::Error),
-    #[error("Failed to set refcount refcount")]
-    SettingRefcountRefcount(#[source] io::Error),
-    #[error("Size too small for number of clusters")]
+    SeekingFile(io::Error),
+    SettingFileSize(io::Error),
+    SettingRefcountRefcount(io::Error),
     SizeTooSmallForNumberOfClusters,
-    #[error("L1 entry table too large: {0}")]
     TooManyL1Entries(u64),
-    #[error("Ref count table too large: {0}")]
     TooManyRefcounts(u64),
-    #[error("Unsupported refcount order")]
     UnsupportedRefcountOrder,
-    #[error("Unsupported version: {0}")]
     UnsupportedVersion(u32),
-    #[error("Failed to write data")]
-    WritingData(#[source] io::Error),
-    #[error("Failed to write header")]
-    WritingHeader(#[source] io::Error),
+    WritingData(io::Error),
+    WritingHeader(io::Error),
 }
 
 pub type Result<T> = std::result::Result<T, Error>;
 
+impl Display for Error {
+    #[remain::check]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::Error::*;
+
+        #[sorted]
+        match self {
+            BackingFileIo(e) => write!(f, "backing file io error: {}", e),
+            BackingFileOpen(e) => write!(f, "backing file open error: {}", *e),
+            BackingFileTooLong(len) => {
+                write!(f, "backing file name is too long: {} bytes over", len)
+            }
+            CompressedBlocksNotSupported => write!(f, "compressed blocks not supported"),
+            EvictingCache(e) => write!(f, "failed to evict cache: {e}"),
+            FileTooBig(size) => write!(f, "file larger than max of {MAX_QCOW_FILE_SIZE}: {size}"),
+            GettingFileSize(e) => write!(f, "failed to get file size: {e}"),
+            GettingRefcount(e) => write!(f, "failed to get refcount: {e}"),
+            InvalidBackingFileName(e) => write!(f, "failed to parse filename: {}", e),
+            InvalidClusterIndex => write!(f, "invalid cluster index"),
+            InvalidClusterSize => write!(f, "invalid cluster size"),
+            InvalidIndex => write!(f, "invalid index"),
+            InvalidL1TableOffset => write!(f, "invalid L1 table offset"),
+            InvalidL1TableSize(size) => write!(f, "invalid L1 table size {size}"),
+            InvalidMagic => write!(f, "invalid magic"),
+            InvalidOffset(_) => write!(f, "invalid offset"),
+            InvalidRefcountTableOffset => write!(f, "invalid refcount table offset"),
+            InvalidRefcountTableSize(size) => write!(f, "invalid refcount table size: {size}"),
+            NoFreeClusters => write!(f, "no free clusters"),
+            NoRefcountClusters => write!(f, "no refcount clusters"),
+            NotEnoughSpaceForRefcounts => write!(f, "not enough space for refcounts"),
+            OpeningFile(e) => write!(f, "failed to open file: {e}"),
+            ReadingData(e) => write!(f, "failed to read data: {e}"),
+            ReadingHeader(e) => write!(f, "failed to read header: {e}"),
+            ReadingPointers(e) => write!(f, "failed to read pointers: {e}"),
+            ReadingRefCountBlock(e) => write!(f, "failed to read ref count block: {e}"),
+            ReadingRefCounts(e) => write!(f, "failed to read ref counts: {e}"),
+            RebuildingRefCounts(e) => write!(f, "failed to rebuild ref counts: {e}"),
+            RefcountTableOffEnd => write!(f, "refcount table offset past file end"),
+            RefcountTableTooLarge => write!(f, "too many clusters specified for refcount table"),
+            SeekingFile(e) => write!(f, "failed to seek file: {e}"),
+            SettingFileSize(e) => write!(f, "failed to set file size: {e}"),
+            SettingRefcountRefcount(e) => write!(f, "failed to set refcount refcount: {e}"),
+            SizeTooSmallForNumberOfClusters => write!(f, "size too small for number of clusters"),
+            TooManyL1Entries(count) => write!(f, "l1 entry table too large: {count}"),
+            TooManyRefcounts(count) => write!(f, "ref count table too large: {count}"),
+            UnsupportedRefcountOrder => write!(f, "unsupported refcount order"),
+            UnsupportedVersion(v) => write!(f, "unsupported version: {v}"),
+            WritingData(e) => write!(f, "failed to write data: {e}"),
+            WritingHeader(e) => write!(f, "failed to write header: {e}"),
+        }
+    }
+}
+
 pub enum ImageType {
     Raw,
     Qcow2,
@@ -287,12 +294,11 @@ impl QcowHeader {
         let cluster_bits: u32 = DEFAULT_CLUSTER_BITS;
         let cluster_size: u32 = 0x01 << cluster_bits;
         let max_length: usize = (cluster_size - header_size) as usize;
-        if let Some(path) = backing_file
-            && path.len() > max_length
-        {
-            return Err(Error::BackingFileTooLong(path.len() - max_length));
+        if let Some(path) = backing_file {
+            if path.len() > max_length {
+                return Err(Error::BackingFileTooLong(path.len() - max_length));
+            }
         }
-
         // L2 blocks are always one cluster long. They contain cluster_size/sizeof(u64) addresses.
         let entries_per_cluster: u32 = cluster_size / size_of::<u64>() as u32;
         let num_clusters: u32 = div_round_up_u64(size, u64::from(cluster_size)) as u32;
@@ -380,7 +386,7 @@ impl QcowHeader {
         }
 
         if let Some(backing_file_path) = self.backing_file_path.as_ref() {
-            write!(file, "{backing_file_path}").map_err(Error::WritingHeader)?;
+            write!(file, "{}", backing_file_path).map_err(Error::WritingHeader)?;
         }
 
         // Set the file length by seeking and writing a zero to the last byte. This avoids needing
@@ -426,7 +432,7 @@ fn max_refcount_clusters(refcount_order: u32, cluster_size: u32, num_clusters: u
 /// #   Ok(())
 /// # }
 /// ```
-#[derive(Clone, Debug)]
+#[derive(Debug)]
 pub struct QcowFile {
     raw_file: QcowRawFile,
     header: QcowHeader,
@@ -439,20 +445,12 @@ pub struct QcowFile {
     // List of unreferenced clusters available to be used. unref clusters become available once the
     // removal of references to them have been synced to disk.
     avail_clusters: Vec<u64>,
-    backing_file: Option<Box<Self>>,
+    backing_file: Option<Box<dyn BlockBackend>>,
 }
 
 impl QcowFile {
     /// Creates a QcowFile from `file`. File must be a valid qcow2 image.
-    ///
-    /// Additionally, max nesting depth of this qcow2 image will be set to default value 10.
-    pub fn from(file: RawFile) -> Result<QcowFile> {
-        Self::from_with_nesting_depth(file, MAX_NESTING_DEPTH)
-    }
-
-    /// Creates a QcowFile from `file` and with a max nesting depth. File must be a valid qcow2
-    /// image.
-    pub fn from_with_nesting_depth(mut file: RawFile, max_nesting_depth: u32) -> Result<QcowFile> {
+    pub fn from(mut file: RawFile) -> Result<QcowFile> {
         let header = QcowHeader::new(&mut file)?;
 
         // Only v2 and v3 files are supported.
@@ -479,20 +477,14 @@ impl QcowFile {
         let direct_io = file.is_direct();
 
         let backing_file = if let Some(backing_file_path) = header.backing_file_path.as_ref() {
-            if max_nesting_depth == 0 {
-                return Err(Error::MaxNestingDepthExceeded);
-            }
             let path = backing_file_path.clone();
             let backing_raw_file = OpenOptions::new()
                 .read(true)
                 .open(path)
                 .map_err(Error::BackingFileIo)?;
-            let backing_file = Self::from_with_nesting_depth(
-                RawFile::new(backing_raw_file, direct_io),
-                max_nesting_depth - 1,
-            )
-            .map_err(|e| Error::BackingFileOpen(Box::new(e)))?;
-            Some(Box::new(backing_file))
+            let backing_file = crate::create_disk_file(backing_raw_file, direct_io)
+                .map_err(|e| Error::BackingFileOpen(Box::new(e)))?;
+            Some(backing_file)
         } else {
             None
         };
@@ -504,7 +496,7 @@ impl QcowFile {
         if refcount_bits != 16 {
             return Err(Error::UnsupportedRefcountOrder);
         }
-        let refcount_bytes = refcount_bits.div_ceil(8);
+        let refcount_bytes = (refcount_bits + 7) / 8;
 
         // Need at least one refcount cluster
         if header.refcount_table_clusters == 0 {
@@ -590,12 +582,14 @@ impl QcowFile {
 
         // Check for compressed blocks
         for l2_addr_disk in l1_table.get_values() {
-            if *l2_addr_disk != 0
-                && let Err(e) = Self::read_l2_cluster(&mut raw_file, *l2_addr_disk)
-                && let Some(os_error) = e.raw_os_error()
-                && os_error == ENOTSUP
-            {
-                return Err(Error::CompressedBlocksNotSupported);
+            if *l2_addr_disk != 0 {
+                if let Err(e) = Self::read_l2_cluster(&mut raw_file, *l2_addr_disk) {
+                    if let Some(os_error) = e.raw_os_error() {
+                        if os_error == ENOTSUP {
+                            return Err(Error::CompressedBlocksNotSupported);
+                        }
+                    }
+                }
             }
         }
 
@@ -638,22 +632,20 @@ impl QcowFile {
         file: RawFile,
         version: u32,
         backing_file_name: &str,
-        backing_file_max_nesting_depth: u32,
     ) -> Result<QcowFile> {
         let direct_io = file.is_direct();
         let backing_raw_file = OpenOptions::new()
             .read(true)
             .open(backing_file_name)
             .map_err(Error::BackingFileIo)?;
-        let backing_file = Self::from_with_nesting_depth(
-            RawFile::new(backing_raw_file, direct_io),
-            backing_file_max_nesting_depth,
-        )
-        .map_err(|e| Error::BackingFileOpen(Box::new(e)))?;
-        let size = backing_file.virtual_size();
+        let backing_file = crate::create_disk_file(backing_raw_file, direct_io)
+            .map_err(|e| Error::BackingFileOpen(Box::new(e)))?;
+        let size = backing_file
+            .size()
+            .map_err(|e| Error::BackingFileOpen(Box::new(e)))?;
         let header = QcowHeader::create_for_size_and_path(version, size, Some(backing_file_name))?;
         let mut result = QcowFile::new_from_header(file, header)?;
-        result.backing_file = Some(Box::new(backing_file));
+        result.backing_file = Some(backing_file);
         Ok(result)
     }
 
@@ -681,7 +673,7 @@ impl QcowFile {
         Ok(qcow)
     }
 
-    pub fn set_backing_file(&mut self, backing: Option<Box<Self>>) {
+    pub fn set_backing_file(&mut self, backing: Option<Box<dyn BlockBackend>>) {
         self.backing_file = backing;
     }
 
@@ -1219,7 +1211,7 @@ impl QcowFile {
     }
 
     // Allocate and initialize a new data cluster. Returns the offset of the
-    // cluster into the file on success.
+    // cluster in to the file on success.
     fn append_data_cluster(&mut self, initial_data: Option<Vec<u8>>) -> std::io::Result<u64> {
         let new_addr: u64 = self.get_new_cluster(initial_data)?;
         // The cluster refcount starts at one indicating it is used but doesn't need COW.
@@ -1516,12 +1508,6 @@ impl QcowFile {
     }
 }
 
-impl AsRawFd for QcowFile {
-    fn as_raw_fd(&self) -> RawFd {
-        self.raw_file.as_raw_fd()
-    }
-}
-
 impl Drop for QcowFile {
     fn drop(&mut self) {
         let _ = self.sync_caches();
@@ -1583,11 +1569,11 @@ impl Seek for QcowFile {
             }
         };
 
-        if let Some(o) = new_offset
-            && o <= self.virtual_size()
-        {
-            self.current_offset = o;
-            return Ok(o);
+        if let Some(o) = new_offset {
+            if o <= self.virtual_size() {
+                self.current_offset = o;
+                return Ok(o);
+            }
         }
         Err(std::io::Error::from_raw_os_error(EINVAL))
     }
@@ -1631,7 +1617,8 @@ impl FileSync for QcowFile {
 
 impl FileSetLen for QcowFile {
     fn set_len(&self, _len: u64) -> std::io::Result<()> {
-        Err(std::io::Error::other(
+        Err(std::io::Error::new(
+            std::io::ErrorKind::Other,
             "set_len() not supported for QcowFile",
         ))
     }
@@ -1642,7 +1629,7 @@ impl PunchHole for QcowFile {
         let mut remaining = length;
         let mut offset = offset;
         while remaining > 0 {
-            let chunk_length = min(remaining, usize::MAX as u64) as usize;
+            let chunk_length = min(remaining, std::usize::MAX as u64) as usize;
             self.deallocate_bytes(offset, chunk_length)?;
             remaining -= chunk_length as u64;
             offset += chunk_length as u64;
@@ -1704,12 +1691,12 @@ fn offset_is_cluster_boundary(offset: u64, cluster_bits: u32) -> Result<()> {
 
 // Ceiling of the division of `dividend`/`divisor`.
 fn div_round_up_u64(dividend: u64, divisor: u64) -> u64 {
-    dividend / divisor + u64::from(!dividend.is_multiple_of(divisor))
+    dividend / divisor + u64::from(dividend % divisor != 0)
 }
 
 // Ceiling of the division of `dividend`/`divisor`.
 fn div_round_up_u32(dividend: u32, divisor: u32) -> u32 {
-    dividend / divisor + u32::from(!dividend.is_multiple_of(divisor))
+    dividend / divisor + u32::from(dividend % divisor != 0)
 }
 
 fn convert_copy<R, W>(reader: &mut R, writer: &mut W, offset: u64, size: u64) -> Result<()>
@@ -1802,17 +1789,11 @@ where
 /// Copy the contents of a disk image in `src_file` into `dst_file`.
 /// The type of `src_file` is automatically detected, and the output file type is
 /// determined by `dst_type`.
-pub fn convert(
-    mut src_file: RawFile,
-    dst_file: RawFile,
-    dst_type: ImageType,
-    src_max_nesting_depth: u32,
-) -> Result<()> {
+pub fn convert(mut src_file: RawFile, dst_file: RawFile, dst_type: ImageType) -> Result<()> {
     let src_type = detect_image_type(&mut src_file)?;
     match src_type {
         ImageType::Qcow2 => {
-            let mut src_reader =
-                QcowFile::from_with_nesting_depth(src_file, src_max_nesting_depth)?;
+            let mut src_reader = QcowFile::from(src_file)?;
             convert_reader(&mut src_reader, dst_file, dst_type)
         }
         ImageType::Raw => {
@@ -1840,15 +1821,11 @@ pub fn detect_image_type(file: &mut RawFile) -> Result<ImageType> {
 
 #[cfg(test)]
 mod tests {
-    use std::fs::File;
-    use std::path::Path;
-
-    use vmm_sys_util::tempdir::TempDir;
+    use super::*;
+    use std::io::{Read, Seek, SeekFrom, Write};
     use vmm_sys_util::tempfile::TempFile;
     use vmm_sys_util::write_zeroes::WriteZeroes;
 
-    use super::*;
-
     fn valid_header_v3() -> Vec<u8> {
         vec![
             0x51u8, 0x46, 0x49, 0xfb, // magic
@@ -2045,80 +2022,6 @@ mod tests {
         assert_eq!(read_header.backing_file_path, header.backing_file_path);
     }
 
-    #[test]
-    fn no_backing_file() {
-        // `backing_file` is `None`
-        let header = QcowHeader::create_for_size_and_path(3, 0x10_0000, None)
-            .expect("Failed to create header.");
-        let mut disk_file: RawFile = RawFile::new(TempFile::new().unwrap().into_file(), false);
-        header
-            .write_to(&mut disk_file)
-            .expect("Failed to write header to shm.");
-        disk_file.rewind().unwrap();
-        // The maximum nesting depth is 0, which means backing file is not allowed.
-        QcowFile::from_with_nesting_depth(disk_file, 0).unwrap();
-    }
-
-    #[test]
-    fn disable_backing_file() {
-        // `backing_file` is `Some`
-        let header =
-            QcowHeader::create_for_size_and_path(3, 0x10_0000, Some("/path/to/backing/file"))
-                .expect("Failed to create header.");
-        let mut disk_file: RawFile = RawFile::new(TempFile::new().unwrap().into_file(), false);
-        header
-            .write_to(&mut disk_file)
-            .expect("Failed to write header to shm.");
-        disk_file.rewind().unwrap();
-        // The maximum nesting depth is 0, which means backing file is not allowed.
-        let res = QcowFile::from_with_nesting_depth(disk_file, 0);
-        assert!(matches!(res.unwrap_err(), Error::MaxNestingDepthExceeded));
-    }
-
-    /// Create a qcow2 file with itself as its backing file.
-    ///
-    /// Without configuration `max_nesting_depth`, this will cause infinite recursion when loading
-    /// the file until stack overflow.
-    fn new_self_referential_qcow(path: &Path) -> Result<()> {
-        let header = QcowHeader::create_for_size_and_path(3, 0x10_0000, path.to_str())?;
-        let mut disk_file = RawFile::new(
-            File::create(path).expect("Failed to create image file."),
-            false,
-        );
-        header.write_to(&mut disk_file)?;
-        Ok(())
-    }
-
-    #[test]
-    fn max_nesting_backing() {
-        let test_dir = TempDir::new_with_prefix("/tmp/ch").unwrap();
-        let img_path = test_dir.as_path().join("test.img");
-
-        new_self_referential_qcow(img_path.as_path()).unwrap();
-
-        let err = QcowFile::from_with_nesting_depth(
-            RawFile::new(
-                File::open(img_path.as_path()).expect("Failed to open qcow image file"),
-                false,
-            ),
-            MAX_NESTING_DEPTH,
-        )
-        .expect_err("Opening qcow file with itself as backing file should fail.");
-
-        // This type of error is complex. For comparing easily, we can check if it contains the
-        // type name after formatting.
-        assert!(format!("{err:?}").contains(&format!("{:?}", Error::MaxNestingDepthExceeded)));
-        // This should recursively call the function ten times before throwing an error, and the
-        // error `BackingFileOpen` should also be repeated ten times.
-        assert_eq!(
-            format!("{err:?}")
-                .matches("BackingFileOpen")
-                .collect::<Vec<_>>()
-                .len() as u32,
-            MAX_NESTING_DEPTH,
-        );
-    }
-
     #[test]
     fn invalid_magic() {
         let invalid_header = vec![0x51u8, 0x46, 0x4a, 0xfb];

block/src/qcow/qcow_raw_file.rs

@@ -1,17 +1,12 @@
 // Copyright 2018 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
-//
-// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
-
-use std::io::{self, BufWriter, Seek, SeekFrom, Write};
-use std::mem::size_of;
-use std::os::fd::{AsRawFd, RawFd};
-
-use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
-use vmm_sys_util::write_zeroes::WriteZeroes;
 
 use super::RawFile;
+use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
+use std::io::{self, BufWriter, Seek, SeekFrom, Write};
+use std::mem::size_of;
+use vmm_sys_util::write_zeroes::WriteZeroes;
 
 /// A qcow file. Allows reading/writing clusters and appending clusters.
 #[derive(Debug)]
@@ -25,7 +20,7 @@ impl QcowRawFile {
     /// Creates a `QcowRawFile` from the given `File`, `None` is returned if `cluster_size` is not
     /// a power of two.
     pub fn from(file: RawFile, cluster_size: u64) -> Option<Self> {
-        if !cluster_size.is_power_of_two() {
+        if cluster_size.count_ones() != 1 {
             return None;
         }
         Some(QcowRawFile {
@@ -36,7 +31,7 @@ impl QcowRawFile {
     }
 
     /// Reads `count` 64 bit offsets and returns them as a vector.
-    /// `mask` optionally `&`s out some of the bits on the file.
+    /// `mask` optionally ands out some of the bits on the file.
     pub fn read_pointer_table(
         &mut self,
         offset: u64,
@@ -55,7 +50,7 @@ impl QcowRawFile {
     }
 
     /// Reads a cluster's worth of 64 bit offsets and returns them as a vector.
-    /// `mask` optionally `&`s out some of the bits on the file.
+    /// `mask` optionally ands out some of the bits on the file.
     pub fn read_pointer_cluster(&mut self, offset: u64, mask: Option<u64>) -> io::Result<Vec<u64>> {
         let count = self.cluster_size / size_of::<u64>() as u64;
         self.read_pointer_table(offset, count, mask)
@@ -160,9 +155,3 @@ impl Clone for QcowRawFile {
         }
     }
 }
-
-impl AsRawFd for QcowRawFile {
-    fn as_raw_fd(&self) -> RawFd {
-        self.file.as_raw_fd()
-    }
-}

block/src/qcow/raw_file.rs

@@ -8,17 +8,15 @@
 //
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
-use std::alloc::{Layout, alloc_zeroed, dealloc};
+use crate::BlockBackend;
+use libc::c_void;
+use std::alloc::{alloc_zeroed, dealloc, Layout};
+use std::convert::TryInto;
 use std::fs::{File, Metadata};
 use std::io::{self, Read, Seek, SeekFrom, Write};
 use std::os::unix::io::{AsRawFd, RawFd};
 use std::slice;
-
-use libc::c_void;
-use vmm_sys_util::seek_hole::SeekHole;
-use vmm_sys_util::write_zeroes::{PunchHole, WriteZeroesAt};
-
-use crate::BlockBackend;
+use vmm_sys_util::{seek_hole::SeekHole, write_zeroes::PunchHole, write_zeroes::WriteZeroesAt};
 
 #[derive(Debug)]
 pub struct RawFile {
@@ -74,7 +72,7 @@ impl RawFile {
 
     fn round_up(&self, offset: u64) -> u64 {
         let align: u64 = self.alignment.try_into().unwrap();
-        offset.div_ceil(align) * align
+        ((offset + align - 1) / align) * align
     }
 
     fn round_down(&self, offset: u64) -> u64 {
@@ -89,9 +87,9 @@ impl RawFile {
 
         let align64: u64 = self.alignment.try_into().unwrap();
 
-        self.position.is_multiple_of(align64)
-            && (buf.as_ptr() as usize).is_multiple_of(self.alignment)
-            && buf.len().is_multiple_of(self.alignment)
+        (self.position % align64 == 0)
+            && ((buf.as_ptr() as usize) % self.alignment == 0)
+            && (buf.len() % self.alignment == 0)
     }
 
     pub fn set_len(&self, size: u64) -> std::io::Result<()> {
@@ -369,9 +367,3 @@ impl Clone for RawFile {
         }
     }
 }
-
-impl AsRawFd for RawFile {
-    fn as_raw_fd(&self) -> RawFd {
-        self.file.as_raw_fd()
-    }
-}

block/src/qcow/refcount.rs

@@ -1,38 +1,51 @@
 // Copyright 2018 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
-//
-// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
+use std::fmt::{self, Display};
 use std::io;
 
 use libc::EINVAL;
-use thiserror::Error;
 
-use crate::qcow::qcow_raw_file::QcowRawFile;
-use crate::qcow::vec_cache::{CacheMap, Cacheable, VecCache};
+use crate::qcow::{
+    qcow_raw_file::QcowRawFile,
+    vec_cache::{CacheMap, Cacheable, VecCache},
+};
 
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
     /// `EvictingCache` - Error writing a refblock from the cache to disk.
-    #[error("Failed to write a refblock from the cache to disk")]
-    EvictingRefCounts(#[source] io::Error),
+    EvictingRefCounts(io::Error),
     /// `InvalidIndex` - Address requested isn't within the range of the disk.
-    #[error("Address requested is not within the range of the disk")]
     InvalidIndex,
     /// `NeedCluster` - Handle this error by reading the cluster and calling the function again.
-    #[error("Cluster with addr={0} needs to be read")]
     NeedCluster(u64),
     /// `NeedNewCluster` - Handle this error by allocating a cluster and calling the function again.
-    #[error("New cluster needs to be allocated for refcounts")]
     NeedNewCluster,
-    /// `ReadingRefCounts` - Error reading the file into the refcount cache.
-    #[error("Failed to read the file into the refcount cache")]
-    ReadingRefCounts(#[source] io::Error),
+    /// `ReadingRefCounts` - Error reading the file in to the refcount cache.
+    ReadingRefCounts(io::Error),
 }
 
 pub type Result<T> = std::result::Result<T, Error>;
 
+impl Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::Error::*;
+
+        match self {
+            EvictingRefCounts(e) => {
+                write!(f, "failed to write a refblock from the cache to disk: {e}")
+            }
+            InvalidIndex => write!(f, "address requested is not within the range of the disk"),
+            NeedCluster(addr) => write!(f, "cluster with addr={addr} needs to be read"),
+            NeedNewCluster => write!(f, "new cluster needs to be allocated for refcounts"),
+            ReadingRefCounts(e) => {
+                write!(f, "failed to read the file into the refcount cache: {e}")
+            }
+        }
+    }
+}
+
 /// Represents the refcount entries for an open qcow file.
 #[derive(Clone, Debug)]
 pub struct RefCount {

block/src/qcow/vec_cache.rs

@@ -1,11 +1,9 @@
 // Copyright 2018 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
-//
-// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
-use std::collections::HashMap;
 use std::collections::hash_map::IterMut;
+use std::collections::HashMap;
 use std::io;
 use std::ops::{Index, IndexMut};
 use std::slice::SliceIndex;
@@ -111,7 +109,7 @@ impl<T: Cacheable> CacheMap<T> {
         self.map.get_mut(&index)
     }
 
-    pub fn iter_mut(&mut self) -> IterMut<'_, usize, T> {
+    pub fn iter_mut(&mut self) -> IterMut<usize, T> {
         self.map.iter_mut()
     }
 
@@ -123,10 +121,10 @@ impl<T: Cacheable> CacheMap<T> {
         if self.map.len() == self.capacity {
             // TODO(dgreid) - smarter eviction strategy.
             let to_evict = *self.map.iter().next().unwrap().0;
-            if let Some(evicted) = self.map.remove(&to_evict)
-                && evicted.dirty()
-            {
-                write_callback(to_evict, evicted)?;
+            if let Some(evicted) = self.map.remove(&to_evict) {
+                if evicted.dirty() {
+                    write_callback(to_evict, evicted)?;
+                }
             }
         }
         self.map.insert(index, block);

block/src/qcow_sync.rs

@@ -2,55 +2,47 @@
 //
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
+use crate::async_io::{AsyncIo, AsyncIoResult, DiskFile, DiskFileError, DiskFileResult};
+use crate::qcow::{QcowFile, RawFile, Result as QcowResult};
+use crate::AsyncAdaptor;
 use std::collections::VecDeque;
 use std::fs::File;
 use std::io::{Seek, SeekFrom};
-use std::os::fd::AsRawFd;
-
+use std::sync::{Arc, Mutex, MutexGuard};
 use vmm_sys_util::eventfd::EventFd;
 
-use crate::AsyncAdaptor;
-use crate::async_io::{
-    AsyncIo, AsyncIoResult, BorrowedDiskFd, DiskFile, DiskFileError, DiskFileResult,
-};
-use crate::qcow::{QcowFile, RawFile, Result as QcowResult};
-
 pub struct QcowDiskSync {
-    qcow_file: QcowFile,
+    qcow_file: Arc<Mutex<QcowFile>>,
 }
 
 impl QcowDiskSync {
     pub fn new(file: File, direct_io: bool) -> QcowResult<Self> {
         Ok(QcowDiskSync {
-            qcow_file: QcowFile::from(RawFile::new(file, direct_io))?,
+            qcow_file: Arc::new(Mutex::new(QcowFile::from(RawFile::new(file, direct_io))?)),
         })
     }
 }
 
 impl DiskFile for QcowDiskSync {
     fn size(&mut self) -> DiskFileResult<u64> {
-        self.qcow_file
-            .seek(SeekFrom::End(0))
-            .map_err(DiskFileError::Size)
+        let mut file = self.qcow_file.lock().unwrap();
+
+        file.seek(SeekFrom::End(0)).map_err(DiskFileError::Size)
     }
 
     fn new_async_io(&self, _ring_depth: u32) -> DiskFileResult<Box<dyn AsyncIo>> {
         Ok(Box::new(QcowSync::new(self.qcow_file.clone())) as Box<dyn AsyncIo>)
     }
-
-    fn fd(&mut self) -> BorrowedDiskFd<'_> {
-        BorrowedDiskFd::new(self.qcow_file.as_raw_fd())
-    }
 }
 
 pub struct QcowSync {
-    qcow_file: QcowFile,
+    qcow_file: Arc<Mutex<QcowFile>>,
     eventfd: EventFd,
     completion_list: VecDeque<(u64, i32)>,
 }
 
 impl QcowSync {
-    pub fn new(qcow_file: QcowFile) -> Self {
+    pub fn new(qcow_file: Arc<Mutex<QcowFile>>) -> Self {
         QcowSync {
             qcow_file,
             eventfd: EventFd::new(libc::EFD_NONBLOCK)
@@ -60,7 +52,11 @@ impl QcowSync {
     }
 }
 
-impl AsyncAdaptor for QcowFile {}
+impl AsyncAdaptor<QcowFile> for Arc<Mutex<QcowFile>> {
+    fn file(&mut self) -> MutexGuard<QcowFile> {
+        self.lock().unwrap()
+    }
+}
 
 impl AsyncIo for QcowSync {
     fn notifier(&self) -> &EventFd {

block/src/raw_async.rs

@@ -2,17 +2,15 @@
 //
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
-use std::fs::File;
-use std::io::{Error, Seek, SeekFrom};
-use std::os::unix::io::{AsRawFd, RawFd};
-
-use io_uring::{IoUring, opcode, types};
-use vmm_sys_util::eventfd::EventFd;
-
 use crate::async_io::{
-    AsyncIo, AsyncIoError, AsyncIoResult, BorrowedDiskFd, DiskFile, DiskFileError, DiskFileResult,
+    AsyncIo, AsyncIoError, AsyncIoResult, DiskFile, DiskFileError, DiskFileResult,
 };
-use crate::{BatchRequest, DiskTopology, RequestType};
+use crate::DiskTopology;
+use io_uring::{opcode, squeue, types, IoUring};
+use std::fs::File;
+use std::io::{Seek, SeekFrom};
+use std::os::unix::io::{AsRawFd, RawFd};
+use vmm_sys_util::eventfd::EventFd;
 
 pub struct RawFileDisk {
     file: File,
@@ -46,10 +44,6 @@ impl DiskFile for RawFileDisk {
             DiskTopology::default()
         }
     }
-
-    fn fd(&mut self) -> BorrowedDiskFd<'_> {
-        BorrowedDiskFd::new(self.file.as_raw_fd())
-    }
 }
 
 pub struct RawFileAsync {
@@ -90,14 +84,14 @@ impl AsyncIo for RawFileAsync {
 
         // SAFETY: we know the file descriptor is valid and we
         // relied on vm-memory to provide the buffer address.
-        unsafe {
+        let _ = unsafe {
             sq.push(
                 &opcode::Readv::new(types::Fd(self.fd), iovecs.as_ptr(), iovecs.len() as u32)
                     .offset(offset.try_into().unwrap())
                     .build()
+                    .flags(squeue::Flags::ASYNC)
                     .user_data(user_data),
             )
-            .map_err(|_| AsyncIoError::ReadVectored(Error::other("Submission queue is full")))?
         };
 
         // Update the submission queue and submit new operations to the
@@ -118,14 +112,14 @@ impl AsyncIo for RawFileAsync {
 
         // SAFETY: we know the file descriptor is valid and we
         // relied on vm-memory to provide the buffer address.
-        unsafe {
+        let _ = unsafe {
             sq.push(
                 &opcode::Writev::new(types::Fd(self.fd), iovecs.as_ptr(), iovecs.len() as u32)
                     .offset(offset.try_into().unwrap())
                     .build()
+                    .flags(squeue::Flags::ASYNC)
                     .user_data(user_data),
             )
-            .map_err(|_| AsyncIoError::WriteVectored(Error::other("Submission queue is full")))?
         };
 
         // Update the submission queue and submit new operations to the
@@ -141,13 +135,13 @@ impl AsyncIo for RawFileAsync {
             let (submitter, mut sq, _) = self.io_uring.split();
 
             // SAFETY: we know the file descriptor is valid.
-            unsafe {
+            let _ = unsafe {
                 sq.push(
                     &opcode::Fsync::new(types::Fd(self.fd))
                         .build()
+                        .flags(squeue::Flags::ASYNC)
                         .user_data(user_data),
                 )
-                .map_err(|_| AsyncIoError::Fsync(Error::other("Submission queue is full")))?
             };
 
             // Update the submission queue and submit new operations to the
@@ -168,77 +162,4 @@ impl AsyncIo for RawFileAsync {
             .next()
             .map(|entry| (entry.user_data(), entry.result()))
     }
-
-    fn batch_requests_enabled(&self) -> bool {
-        true
-    }
-
-    fn submit_batch_requests(&mut self, batch_request: &[BatchRequest]) -> AsyncIoResult<()> {
-        if !self.batch_requests_enabled() {
-            return Ok(());
-        }
-
-        let (submitter, mut sq, _) = self.io_uring.split();
-        let mut submitted = false;
-
-        for req in batch_request {
-            match req.request_type {
-                RequestType::In => {
-                    // SAFETY: we know the file descriptor is valid and we
-                    // relied on vm-memory to provide the buffer address.
-                    unsafe {
-                        sq.push(
-                            &opcode::Readv::new(
-                                types::Fd(self.fd),
-                                req.iovecs.as_ptr(),
-                                req.iovecs.len() as u32,
-                            )
-                            .offset(req.offset as u64)
-                            .build()
-                            .user_data(req.user_data),
-                        )
-                        .map_err(|_| {
-                            AsyncIoError::ReadVectored(Error::other("Submission queue is full"))
-                        })?
-                    };
-                    submitted = true;
-                }
-                RequestType::Out => {
-                    // SAFETY: we know the file descriptor is valid and we
-                    // relied on vm-memory to provide the buffer address.
-                    unsafe {
-                        sq.push(
-                            &opcode::Writev::new(
-                                types::Fd(self.fd),
-                                req.iovecs.as_ptr(),
-                                req.iovecs.len() as u32,
-                            )
-                            .offset(req.offset as u64)
-                            .build()
-                            .user_data(req.user_data),
-                        )
-                        .map_err(|_| {
-                            AsyncIoError::WriteVectored(Error::other("Submission queue is full"))
-                        })?
-                    };
-                    submitted = true;
-                }
-                _ => {
-                    unreachable!("Unexpected batch request type: {:?}", req.request_type)
-                }
-            }
-        }
-
-        // Only submit if we actually queued something
-        if submitted {
-            // Update the submission queue and submit new operations to the
-            // io_uring instance.
-            sq.sync();
-            submitter
-                .submit()
-                .map_err(AsyncIoError::SubmitBatchRequests)?;
-        }
-
-        Ok(())
-    }
 }

block/src/raw_async_aio.rs

@@ -5,18 +5,16 @@
 // Copyright © 2023 Crusoe Energy Systems LLC
 //
 
+use crate::async_io::{
+    AsyncIo, AsyncIoError, AsyncIoResult, DiskFile, DiskFileError, DiskFileResult,
+};
+use crate::DiskTopology;
 use std::fs::File;
 use std::io::{Seek, SeekFrom};
 use std::os::unix::io::{AsRawFd, RawFd};
-
 use vmm_sys_util::aio;
 use vmm_sys_util::eventfd::EventFd;
 
-use crate::DiskTopology;
-use crate::async_io::{
-    AsyncIo, AsyncIoError, AsyncIoResult, BorrowedDiskFd, DiskFile, DiskFileError, DiskFileResult,
-};
-
 pub struct RawFileDiskAio {
     file: File,
 }
@@ -49,10 +47,6 @@ impl DiskFile for RawFileDiskAio {
             DiskTopology::default()
         }
     }
-
-    fn fd(&mut self) -> BorrowedDiskFd<'_> {
-        BorrowedDiskFd::new(self.file.as_raw_fd())
-    }
 }
 
 pub struct RawFileAsyncAio {

block/src/raw_sync.rs

@@ -2,18 +2,16 @@
 //
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
+use crate::async_io::{
+    AsyncIo, AsyncIoError, AsyncIoResult, DiskFile, DiskFileError, DiskFileResult,
+};
+use crate::DiskTopology;
 use std::collections::VecDeque;
 use std::fs::File;
 use std::io::{Seek, SeekFrom};
 use std::os::unix::io::{AsRawFd, RawFd};
-
 use vmm_sys_util::eventfd::EventFd;
 
-use crate::DiskTopology;
-use crate::async_io::{
-    AsyncIo, AsyncIoError, AsyncIoResult, BorrowedDiskFd, DiskFile, DiskFileError, DiskFileResult,
-};
-
 pub struct RawFileDiskSync {
     file: File,
 }
@@ -43,10 +41,6 @@ impl DiskFile for RawFileDiskSync {
             DiskTopology::default()
         }
     }
-
-    fn fd(&mut self) -> BorrowedDiskFd<'_> {
-        BorrowedDiskFd::new(self.file.as_raw_fd())
-    }
 }
 
 pub struct RawFileSync {

block/src/vhd.rs

@@ -2,11 +2,11 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+use crate::{read_aligned_block_size, DiskTopology};
+use std::convert::TryInto;
 use std::fs::File;
 use std::io::{Seek, SeekFrom};
 
-use crate::{DiskTopology, read_aligned_block_size};
-
 #[derive(Clone, Copy)]
 pub struct VhdFooter {
     cookie: u64,
@@ -118,13 +118,11 @@ pub fn is_fixed_vhd(f: &mut File) -> std::io::Result<bool> {
 
 #[cfg(test)]
 mod tests {
+    use super::{is_fixed_vhd, VhdFooter};
     use std::fs::File;
     use std::io::{Seek, SeekFrom, Write};
-
     use vmm_sys_util::tempfile::TempFile;
 
-    use super::{VhdFooter, is_fixed_vhd};
-
     fn valid_fixed_vhd_footer() -> Vec<u8> {
         vec![
             0x63, 0x6f, 0x6e, 0x65, 0x63, 0x74, 0x69, 0x78, // cookie

block/src/vhdx/mod.rs

@@ -2,21 +2,26 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+use crate::vhdx::{
+    vhdx_bat::{BatEntry, VhdxBatError},
+    vhdx_header::{RegionInfo, RegionTableEntry, VhdxHeader, VhdxHeaderError},
+    vhdx_io::VhdxIoError,
+    vhdx_metadata::{DiskSpec, VhdxMetadataError},
+};
+use crate::BlockBackend;
+use byteorder::{BigEndian, ByteOrder};
+use remain::sorted;
 use std::collections::btree_map::BTreeMap;
 use std::fs::File;
 use std::io::{Read, Seek, SeekFrom, Write};
-use std::os::fd::{AsRawFd, RawFd};
-
-use byteorder::{BigEndian, ByteOrder};
-use remain::sorted;
 use thiserror::Error;
 use uuid::Uuid;
 
-use crate::BlockBackend;
-use crate::vhdx::vhdx_bat::{BatEntry, VhdxBatError};
-use crate::vhdx::vhdx_header::{RegionInfo, RegionTableEntry, VhdxHeader, VhdxHeaderError};
-use crate::vhdx::vhdx_io::VhdxIoError;
-use crate::vhdx::vhdx_metadata::{DiskSpec, VhdxMetadataError};
+macro_rules! div_round_up {
+    ($n:expr,$d:expr) => {
+        ($n + $d - 1) / $d
+    };
+}
 
 mod vhdx_bat;
 mod vhdx_header;
@@ -26,19 +31,19 @@ mod vhdx_metadata;
 #[sorted]
 #[derive(Error, Debug)]
 pub enum VhdxError {
-    #[error("Not a VHDx file")]
+    #[error("Not a VHDx file {0}")]
     NotVhdx(#[source] VhdxHeaderError),
-    #[error("Failed to parse VHDx header")]
+    #[error("Failed to parse VHDx header {0}")]
     ParseVhdxHeader(#[source] VhdxHeaderError),
-    #[error("Failed to parse VHDx metadata")]
+    #[error("Failed to parse VHDx metadata {0}")]
     ParseVhdxMetadata(#[source] VhdxMetadataError),
-    #[error("Failed to parse VHDx region entries")]
+    #[error("Failed to parse VHDx region entries {0}")]
     ParseVhdxRegionEntry(#[source] VhdxHeaderError),
-    #[error("Failed reading metadata")]
+    #[error("Failed reading metadata {0}")]
     ReadBatEntry(#[source] VhdxBatError),
-    #[error("Failed reading sector from disk")]
+    #[error("Failed reading sector from disk {0}")]
     ReadFailed(#[source] VhdxIoError),
-    #[error("Failed writing to sector on disk")]
+    #[error("Failed writing to sector on disk {0}")]
     WriteFailed(#[source] VhdxIoError),
 }
 
@@ -100,10 +105,11 @@ impl Read for Vhdx {
     /// Wrapper function to satisfy Read trait implementation for VHDx disk.
     /// Convert the offset to sector index and buffer length to sector count.
     fn read(&mut self, buf: &mut [u8]) -> std::result::Result<usize, std::io::Error> {
-        let sector_count = (buf.len() as u64).div_ceil(self.disk_spec.logical_sector_size as u64);
+        let sector_count =
+            div_round_up!(buf.len() as u64, self.disk_spec.logical_sector_size as u64);
         let sector_index = self.current_offset / self.disk_spec.logical_sector_size as u64;
 
-        let result = vhdx_io::read(
+        vhdx_io::read(
             &mut self.file,
             buf,
             &self.disk_spec,
@@ -112,14 +118,13 @@ impl Read for Vhdx {
             sector_count,
         )
         .map_err(|e| {
-            std::io::Error::other(format!(
-                "Failed reading {sector_count} sectors from VHDx at index {sector_index}: {e}"
-            ))
-        })?;
-
-        self.current_offset = self.current_offset.checked_add(result as u64).unwrap();
-
-        Ok(result)
+            std::io::Error::new(
+                std::io::ErrorKind::Other,
+                format!(
+                    "Failed reading {sector_count} sectors from VHDx at index {sector_index}: {e}"
+                ),
+            )
+        })
     }
 }
 
@@ -131,17 +136,21 @@ impl Write for Vhdx {
     /// Wrapper function to satisfy Write trait implementation for VHDx disk.
     /// Convert the offset to sector index and buffer length to sector count.
     fn write(&mut self, buf: &[u8]) -> std::result::Result<usize, std::io::Error> {
-        let sector_count = (buf.len() as u64).div_ceil(self.disk_spec.logical_sector_size as u64);
+        let sector_count =
+            div_round_up!(buf.len() as u64, self.disk_spec.logical_sector_size as u64);
         let sector_index = self.current_offset / self.disk_spec.logical_sector_size as u64;
 
         if self.first_write {
             self.first_write = false;
-            self.vhdx_header
-                .update(&mut self.file)
-                .map_err(|e| std::io::Error::other(format!("Failed to update VHDx header: {e}")))?;
+            self.vhdx_header.update(&mut self.file).map_err(|e| {
+                std::io::Error::new(
+                    std::io::ErrorKind::Other,
+                    format!("Failed to update VHDx header: {e}"),
+                )
+            })?;
         }
 
-        let result = vhdx_io::write(
+        vhdx_io::write(
             &mut self.file,
             buf,
             &mut self.disk_spec,
@@ -151,14 +160,13 @@ impl Write for Vhdx {
             sector_count,
         )
         .map_err(|e| {
-            std::io::Error::other(format!(
-                "Failed writing {sector_count} sectors on VHDx at index {sector_index}: {e}"
-            ))
-        })?;
-
-        self.current_offset = self.current_offset.checked_add(result as u64).unwrap();
-
-        Ok(result)
+            std::io::Error::new(
+                std::io::ErrorKind::Other,
+                format!(
+                    "Failed writing {sector_count} sectors on VHDx at index {sector_index}: {e}"
+                ),
+            )
+        })
     }
 }
 
@@ -187,11 +195,11 @@ impl Seek for Vhdx {
             }
         };
 
-        if let Some(o) = new_offset
-            && o <= self.virtual_disk_size()
-        {
-            self.current_offset = o;
-            return Ok(o);
+        if let Some(o) = new_offset {
+            if o <= self.virtual_disk_size() {
+                self.current_offset = o;
+                return Ok(o);
+            }
         }
 
         Err(std::io::Error::new(
@@ -223,12 +231,6 @@ impl Clone for Vhdx {
     }
 }
 
-impl AsRawFd for Vhdx {
-    fn as_raw_fd(&self) -> RawFd {
-        self.file.as_raw_fd()
-    }
-}
-
 pub(crate) fn uuid_from_guid(buf: &[u8]) -> Uuid {
     // The first 3 fields of UUID are stored in Big Endian format, and
     // the last 8 bytes are stored as byte array. Therefore, we read the

block/src/vhdx/vhdx_bat.rs

@@ -2,17 +2,14 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+use crate::vhdx::{vhdx_header::RegionTableEntry, vhdx_metadata::DiskSpec};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+use remain::sorted;
 use std::fs::File;
 use std::io::{self, Seek, SeekFrom};
 use std::mem::size_of;
-
-use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
-use remain::sorted;
 use thiserror::Error;
 
-use crate::vhdx::vhdx_header::RegionTableEntry;
-use crate::vhdx::vhdx_metadata::DiskSpec;
-
 // Payload BAT Entry States
 pub const PAYLOAD_BLOCK_NOT_PRESENT: u64 = 0;
 pub const PAYLOAD_BLOCK_UNDEFINED: u64 = 1;
@@ -33,9 +30,9 @@ pub enum VhdxBatError {
     InvalidBatEntry,
     #[error("Invalid BAT entry count")]
     InvalidEntryCount,
-    #[error("Failed to read BAT entry")]
+    #[error("Failed to read BAT entry {0}")]
     ReadBat(#[source] io::Error),
-    #[error("Failed to write BAT entry")]
+    #[error("Failed to write BAT entry {0}")]
     WriteBat(#[source] io::Error),
 }
 
@@ -78,7 +75,7 @@ impl BatEntry {
 
     // Calculate the number of entries in the BAT
     fn calculate_entries(block_size: u32, virtual_disk_size: u64, chunk_ratio: u64) -> u64 {
-        let data_blocks_count = virtual_disk_size.div_ceil(block_size as u64);
+        let data_blocks_count = div_round_up!(virtual_disk_size, block_size as u64);
         data_blocks_count + (data_blocks_count - 1) / chunk_ratio
     }
 

block/src/vhdx/vhdx_header.rs

@@ -4,13 +4,13 @@
 
 extern crate log;
 
+use byteorder::{ByteOrder, LittleEndian, ReadBytesExt};
+use remain::sorted;
 use std::collections::btree_map::BTreeMap;
+use std::convert::TryInto;
 use std::fs::File;
 use std::io::{self, Read, Seek, SeekFrom, Write};
 use std::mem::size_of;
-
-use byteorder::{ByteOrder, LittleEndian, ReadBytesExt};
-use remain::sorted;
 use thiserror::Error;
 use uuid::Uuid;
 
@@ -91,7 +91,7 @@ pub type Result<T> = std::result::Result<T, VhdxHeaderError>;
 
 #[derive(Clone, Debug)]
 pub struct FileTypeIdentifier {
-    pub _signature: u64,
+    pub signature: u64,
 }
 
 impl FileTypeIdentifier {
@@ -99,18 +99,18 @@ impl FileTypeIdentifier {
     pub fn new(f: &mut File) -> Result<FileTypeIdentifier> {
         f.seek(SeekFrom::Start(FILE_START))
             .map_err(VhdxHeaderError::SeekFileTypeIdentifier)?;
-        let _signature = f
+        let signature = f
             .read_u64::<LittleEndian>()
             .map_err(VhdxHeaderError::ReadFileTypeIdentifier)?;
-        if _signature != VHDX_SIGN {
+        if signature != VHDX_SIGN {
             return Err(VhdxHeaderError::InvalidVHDXSign);
         }
 
-        Ok(FileTypeIdentifier { _signature })
+        Ok(FileTypeIdentifier { signature })
     }
 }
 
-#[repr(C, packed)]
+#[repr(packed)]
 #[derive(Clone, Copy, Debug)]
 pub struct Header {
     pub signature: u32,
@@ -128,7 +128,7 @@ pub struct Header {
 impl Header {
     /// Reads the Header structure from a reference VHDx file
     pub fn new(f: &mut File, start: u64) -> Result<Header> {
-        // Read the whole header into a buffer. We will need it for
+        // Read the whole header in to a buffer. We will need it for
         // calculating checksum.
         let mut buffer = [0; HEADER_SIZE as usize];
         f.seek(SeekFrom::Start(start))
@@ -142,7 +142,7 @@ impl Header {
             return Err(VhdxHeaderError::InvalidHeaderSign);
         }
 
-        let new_checksum = calculate_checksum(&mut buffer, size_of::<u32>());
+        let new_checksum = calculate_checksum(&mut buffer, size_of::<u32>())?;
         if header.checksum != new_checksum {
             return Err(VhdxHeaderError::InvalidChecksum(String::from("Header")));
         }
@@ -151,7 +151,7 @@ impl Header {
     }
 
     /// Converts the header structure into a buffer
-    fn write_to_buffer(&self, buffer: &mut [u8; HEADER_SIZE as usize]) {
+    fn get_header_as_buffer(&self, buffer: &mut [u8; HEADER_SIZE as usize]) {
         // SAFETY: self is a valid header.
         let reference = unsafe {
             std::slice::from_raw_parts(self as *const Header as *const u8, HEADER_SIZE as usize)
@@ -160,7 +160,7 @@ impl Header {
     }
 
     /// Creates and returns new updated header from the provided current header
-    fn update_header(
+    pub fn update_header(
         f: &mut File,
         current_header: &Header,
         change_data_guid: bool,
@@ -191,9 +191,11 @@ impl Header {
             log_offset: current_header.log_offset,
         };
 
-        new_header.write_to_buffer(&mut buffer);
-        new_header.checksum = calculate_checksum(&mut buffer, size_of::<u32>());
-        new_header.write_to_buffer(&mut buffer);
+        new_header.get_header_as_buffer(&mut buffer);
+        let mut crc = crc_any::CRC::crc32c();
+        crc.digest(&buffer);
+        new_header.checksum = crc.get_crc() as u32;
+        new_header.get_header_as_buffer(&mut buffer);
 
         f.seek(SeekFrom::Start(start))
             .map_err(VhdxHeaderError::SeekHeader)?;
@@ -203,7 +205,7 @@ impl Header {
     }
 }
 
-#[repr(C, packed)]
+#[repr(packed)]
 #[derive(Clone, Copy, Debug)]
 struct RegionTableHeader {
     pub signature: u32,
@@ -229,7 +231,7 @@ impl RegionTableHeader {
             return Err(VhdxHeaderError::InvalidRegionSign);
         }
 
-        let new_checksum = calculate_checksum(&mut buffer, size_of::<u32>());
+        let new_checksum = calculate_checksum(&mut buffer, size_of::<u32>())?;
         if region_table_header.checksum != new_checksum {
             return Err(VhdxHeaderError::InvalidChecksum(String::from("Region")));
         }
@@ -328,7 +330,7 @@ impl RegionInfo {
     }
 }
 
-#[repr(C, packed)]
+#[repr(packed)]
 #[derive(Clone, Copy, Debug)]
 pub struct RegionTableEntry {
     pub guid: Uuid,
@@ -351,6 +353,12 @@ impl RegionTableEntry {
     }
 }
 
+#[derive(Clone, Debug)]
+struct RegionEntry {
+    _start: u64,
+    _end: u64,
+}
+
 enum HeaderNo {
     First,
     Second,
@@ -369,10 +377,22 @@ pub struct VhdxHeader {
 impl VhdxHeader {
     /// Creates a VhdxHeader from a reference to a file
     pub fn new(f: &mut File) -> Result<VhdxHeader> {
+        let _file_type_identifier: FileTypeIdentifier = FileTypeIdentifier::new(f)?;
+        let header_1 = Header::new(f, HEADER_1_START);
+        let header_2 = Header::new(f, HEADER_2_START);
+
+        let mut file_write_guid: u128 = 0;
+        let metadata = f.metadata().map_err(VhdxHeaderError::ReadMetadata)?;
+        if !metadata.permissions().readonly() {
+            file_write_guid = Uuid::new_v4().as_u128();
+        }
+
+        let (header_1, header_2) =
+            VhdxHeader::update_headers(f, header_1, header_2, file_write_guid)?;
         Ok(VhdxHeader {
-            _file_type_identifier: FileTypeIdentifier::new(f)?,
-            header_1: Header::new(f, HEADER_1_START)?,
-            header_2: Header::new(f, HEADER_2_START)?,
+            _file_type_identifier,
+            header_1,
+            header_2,
             region_table_1: RegionTableHeader::new(f, REGION_TABLE_1_START)?,
             _region_table_2: RegionTableHeader::new(f, REGION_TABLE_2_START)?,
         })
@@ -454,11 +474,13 @@ impl VhdxHeader {
 /// Therefore, before calculating, the existing checksum is retrieved and the
 /// corresponding field is made zero. After the calculation, the existing checksum
 /// is put back to the buffer.
-fn calculate_checksum(buffer: &mut [u8], csum_offset: usize) -> u32 {
-    // Read the original checksum from the buffer
-    let orig_csum = LittleEndian::read_u32(&buffer[csum_offset..csum_offset + 4]);
+pub fn calculate_checksum(buffer: &mut [u8], csum_offset: usize) -> Result<u32> {
+    // Read the checksum into a mutable slice
+    let csum_buf = &mut buffer[csum_offset..csum_offset + 4];
+    // Convert the checksum chunk in to a u32 integer
+    let orig_csum = LittleEndian::read_u32(csum_buf);
     // Zero the checksum in the buffer
-    LittleEndian::write_u32(&mut buffer[csum_offset..csum_offset + 4], 0);
+    LittleEndian::write_u32(csum_buf, 0);
     // Calculate the checksum on the resulting buffer
     let mut crc = crc_any::CRC::crc32c();
     crc.digest(&buffer);
@@ -467,5 +489,5 @@ fn calculate_checksum(buffer: &mut [u8], csum_offset: usize) -> u32 {
     // Put back the original checksum in the buffer
     LittleEndian::write_u32(&mut buffer[csum_offset..csum_offset + 4], orig_csum);
 
-    new_csum
+    Ok(new_csum)
 }

block/src/vhdx/vhdx_io.rs

@@ -2,15 +2,15 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+use crate::vhdx::{
+    vhdx_bat::{self, BatEntry, VhdxBatError},
+    vhdx_metadata::{self, DiskSpec},
+};
+use remain::sorted;
 use std::fs::File;
 use std::io::{self, Read, Seek, SeekFrom, Write};
-
-use remain::sorted;
 use thiserror::Error;
 
-use crate::vhdx::vhdx_bat::{self, BatEntry, VhdxBatError};
-use crate::vhdx::vhdx_metadata::{self, DiskSpec};
-
 const SECTOR_SIZE: u64 = 512;
 
 #[sorted]
@@ -35,7 +35,9 @@ pub enum VhdxIoError {
 pub type Result<T> = std::result::Result<T, VhdxIoError>;
 
 macro_rules! align {
-    ($n:expr, $align:expr) => {{ $n.div_ceil($align) * $align }};
+    ($n:expr, $align:expr) => {{
+        (($n + $align - 1) / $align) * $align
+    }};
 }
 
 #[derive(Default)]
@@ -93,45 +95,46 @@ pub fn read(
     mut sector_index: u64,
     mut sector_count: u64,
 ) -> Result<usize> {
-    if disk_spec.has_parent {
-        return Err(VhdxIoError::UnsupportedMode);
-    }
-
     let mut read_count: usize = 0;
+
     while sector_count > 0 {
-        let sector = Sector::new(disk_spec, bat, sector_index, sector_count)?;
+        if disk_spec.has_parent {
+            return Err(VhdxIoError::UnsupportedMode);
+        } else {
+            let sector = Sector::new(disk_spec, bat, sector_index, sector_count)?;
 
-        let bat_entry = match bat.get(sector.bat_index as usize) {
-            Some(entry) => entry.0,
-            None => {
-                return Err(VhdxIoError::InvalidBatIndex);
-            }
-        };
+            let bat_entry = match bat.get(sector.bat_index as usize) {
+                Some(entry) => entry.0,
+                None => {
+                    return Err(VhdxIoError::InvalidBatIndex);
+                }
+            };
 
-        match bat_entry & vhdx_bat::BAT_STATE_BIT_MASK {
-            vhdx_bat::PAYLOAD_BLOCK_NOT_PRESENT
-            | vhdx_bat::PAYLOAD_BLOCK_UNDEFINED
-            | vhdx_bat::PAYLOAD_BLOCK_UNMAPPED
-            | vhdx_bat::PAYLOAD_BLOCK_ZERO => {}
-            vhdx_bat::PAYLOAD_BLOCK_FULLY_PRESENT => {
-                f.seek(SeekFrom::Start(sector.file_offset))
+            match bat_entry & vhdx_bat::BAT_STATE_BIT_MASK {
+                vhdx_bat::PAYLOAD_BLOCK_NOT_PRESENT
+                | vhdx_bat::PAYLOAD_BLOCK_UNDEFINED
+                | vhdx_bat::PAYLOAD_BLOCK_UNMAPPED
+                | vhdx_bat::PAYLOAD_BLOCK_ZERO => {}
+                vhdx_bat::PAYLOAD_BLOCK_FULLY_PRESENT => {
+                    f.seek(SeekFrom::Start(sector.file_offset))
+                        .map_err(VhdxIoError::ReadSectorBlock)?;
+                    f.read_exact(
+                        &mut buf[read_count
+                            ..(read_count + (sector.free_sectors * SECTOR_SIZE) as usize)],
+                    )
                     .map_err(VhdxIoError::ReadSectorBlock)?;
-                f.read_exact(
-                    &mut buf
-                        [read_count..(read_count + (sector.free_sectors * SECTOR_SIZE) as usize)],
-                )
-                .map_err(VhdxIoError::ReadSectorBlock)?;
-            }
-            vhdx_bat::PAYLOAD_BLOCK_PARTIALLY_PRESENT => {
-                return Err(VhdxIoError::UnsupportedMode);
-            }
-            _ => {
-                return Err(VhdxIoError::InvalidBatEntryState);
-            }
+                }
+                vhdx_bat::PAYLOAD_BLOCK_PARTIALLY_PRESENT => {
+                    return Err(VhdxIoError::UnsupportedMode);
+                }
+                _ => {
+                    return Err(VhdxIoError::InvalidBatEntryState);
+                }
+            };
+            sector_count -= sector.free_sectors;
+            sector_index += sector.free_sectors;
+            read_count = sector.free_bytes as usize;
         };
-        sector_count -= sector.free_sectors;
-        sector_index += sector.free_sectors;
-        read_count += sector.free_bytes as usize;
     }
     Ok(read_count)
 }
@@ -147,73 +150,77 @@ pub fn write(
     mut sector_index: u64,
     mut sector_count: u64,
 ) -> Result<usize> {
-    if disk_spec.has_parent {
-        return Err(VhdxIoError::UnsupportedMode);
-    }
-
     let mut write_count: usize = 0;
+
     while sector_count > 0 {
-        let sector = Sector::new(disk_spec, bat, sector_index, sector_count)?;
+        if disk_spec.has_parent {
+            return Err(VhdxIoError::UnsupportedMode);
+        } else {
+            let sector = Sector::new(disk_spec, bat, sector_index, sector_count)?;
 
-        let bat_entry = match bat.get(sector.bat_index as usize) {
-            Some(entry) => entry.0,
-            None => {
-                return Err(VhdxIoError::InvalidBatIndex);
-            }
-        };
-
-        match bat_entry & vhdx_bat::BAT_STATE_BIT_MASK {
-            vhdx_bat::PAYLOAD_BLOCK_NOT_PRESENT
-            | vhdx_bat::PAYLOAD_BLOCK_UNDEFINED
-            | vhdx_bat::PAYLOAD_BLOCK_UNMAPPED
-            | vhdx_bat::PAYLOAD_BLOCK_ZERO => {
-                let file_offset =
-                    align!(disk_spec.image_size, vhdx_metadata::BLOCK_SIZE_MIN as u64);
-                let new_size = file_offset
-                    .checked_add(disk_spec.block_size as u64)
-                    .ok_or(VhdxIoError::InvalidDiskSize)?;
-
-                f.set_len(new_size).map_err(VhdxIoError::ResizeFile)?;
-                disk_spec.image_size = new_size;
-
-                let new_bat_entry = file_offset
-                    | (vhdx_bat::PAYLOAD_BLOCK_FULLY_PRESENT & vhdx_bat::BAT_STATE_BIT_MASK);
-                bat[sector.bat_index as usize] = BatEntry(new_bat_entry);
-                BatEntry::write_bat_entries(f, bat_offset, bat).map_err(VhdxIoError::WriteBat)?;
-
-                if file_offset < vhdx_metadata::BLOCK_SIZE_MIN as u64 {
-                    break;
+            let bat_entry = match bat.get(sector.bat_index as usize) {
+                Some(entry) => entry.0,
+                None => {
+                    return Err(VhdxIoError::InvalidBatIndex);
                 }
+            };
 
-                f.seek(SeekFrom::Start(file_offset))
+            match bat_entry & vhdx_bat::BAT_STATE_BIT_MASK {
+                vhdx_bat::PAYLOAD_BLOCK_NOT_PRESENT
+                | vhdx_bat::PAYLOAD_BLOCK_UNDEFINED
+                | vhdx_bat::PAYLOAD_BLOCK_UNMAPPED
+                | vhdx_bat::PAYLOAD_BLOCK_ZERO => {
+                    let file_offset =
+                        align!(disk_spec.image_size, vhdx_metadata::BLOCK_SIZE_MIN as u64);
+                    let new_size = file_offset
+                        .checked_add(disk_spec.block_size as u64)
+                        .ok_or(VhdxIoError::InvalidDiskSize)?;
+
+                    f.set_len(new_size).map_err(VhdxIoError::ResizeFile)?;
+                    disk_spec.image_size = new_size;
+
+                    let new_bat_entry = file_offset
+                        | (vhdx_bat::PAYLOAD_BLOCK_FULLY_PRESENT & vhdx_bat::BAT_STATE_BIT_MASK);
+                    bat[sector.bat_index as usize] = BatEntry(new_bat_entry);
+                    BatEntry::write_bat_entries(f, bat_offset, bat)
+                        .map_err(VhdxIoError::WriteBat)?;
+
+                    if file_offset < vhdx_metadata::BLOCK_SIZE_MIN as u64 {
+                        break;
+                    }
+
+                    f.seek(SeekFrom::Start(file_offset))
+                        .map_err(VhdxIoError::ReadSectorBlock)?;
+                    f.write_all(
+                        &buf[write_count
+                            ..(write_count + (sector.free_sectors * SECTOR_SIZE) as usize)],
+                    )
                     .map_err(VhdxIoError::ReadSectorBlock)?;
-                f.write_all(
-                    &buf[write_count..(write_count + (sector.free_sectors * SECTOR_SIZE) as usize)],
-                )
-                .map_err(VhdxIoError::ReadSectorBlock)?;
-            }
-            vhdx_bat::PAYLOAD_BLOCK_FULLY_PRESENT => {
-                if sector.file_offset < vhdx_metadata::BLOCK_SIZE_MIN as u64 {
-                    break;
                 }
+                vhdx_bat::PAYLOAD_BLOCK_FULLY_PRESENT => {
+                    if sector.file_offset < vhdx_metadata::BLOCK_SIZE_MIN as u64 {
+                        break;
+                    }
 
-                f.seek(SeekFrom::Start(sector.file_offset))
+                    f.seek(SeekFrom::Start(sector.file_offset))
+                        .map_err(VhdxIoError::ReadSectorBlock)?;
+                    f.write_all(
+                        &buf[write_count
+                            ..(write_count + (sector.free_sectors * SECTOR_SIZE) as usize)],
+                    )
                     .map_err(VhdxIoError::ReadSectorBlock)?;
-                f.write_all(
-                    &buf[write_count..(write_count + (sector.free_sectors * SECTOR_SIZE) as usize)],
-                )
-                .map_err(VhdxIoError::ReadSectorBlock)?;
-            }
-            vhdx_bat::PAYLOAD_BLOCK_PARTIALLY_PRESENT => {
-                return Err(VhdxIoError::UnsupportedMode);
-            }
-            _ => {
-                return Err(VhdxIoError::InvalidBatEntryState);
-            }
+                }
+                vhdx_bat::PAYLOAD_BLOCK_PARTIALLY_PRESENT => {
+                    return Err(VhdxIoError::UnsupportedMode);
+                }
+                _ => {
+                    return Err(VhdxIoError::InvalidBatEntryState);
+                }
+            };
+            sector_count -= sector.free_sectors;
+            sector_index += sector.free_sectors;
+            write_count = sector.free_bytes as usize;
         };
-        sector_count -= sector.free_sectors;
-        sector_index += sector.free_sectors;
-        write_count += sector.free_bytes as usize;
     }
     Ok(write_count)
 }

block/src/vhdx/vhdx_metadata.rs

@@ -2,17 +2,15 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+use crate::vhdx::vhdx_header::RegionTableEntry;
+use byteorder::{LittleEndian, ReadBytesExt};
+use remain::sorted;
 use std::fs::File;
 use std::io::{self, Read, Seek, SeekFrom};
 use std::mem::size_of;
-
-use byteorder::{LittleEndian, ReadBytesExt};
-use remain::sorted;
 use thiserror::Error;
 use uuid::Uuid;
 
-use crate::vhdx::vhdx_header::RegionTableEntry;
-
 const METADATA_SIGN: u64 = 0x6174_6164_6174_656D;
 const METADATA_ENTRY_SIZE: usize = 32;
 const METADATA_MAX_ENTRIES: u16 = 2047;
@@ -55,8 +53,6 @@ const METADATA_LENGTH_MAX: u32 = 1 << 20; // 1 MiB
 pub enum VhdxMetadataError {
     #[error("Invalid block size count")]
     InvalidBlockSize,
-    #[error("Invalid disk size {0}")]
-    InvalidDiskSize(u64),
     #[error("Invalid metadata entry count")]
     InvalidEntryCount,
     #[error("Invalid logical sector size")]
@@ -216,14 +212,6 @@ impl DiskSpec {
         if metadata_presence != METADATA_ALL_PRESENT {
             return Err(VhdxMetadataError::MissingMetadata);
         }
-        // Make sure virtual disk size is not zero
-        if (metadata_presence & METADATA_VIRTUAL_DISK_SIZE_PRESENT != 0)
-            && disk_spec.virtual_disk_size == 0
-        {
-            return Err(VhdxMetadataError::InvalidDiskSize(
-                disk_spec.virtual_disk_size,
-            ));
-        }
         // Check if the virtual disk size is a multiple of the logical sector
         // size.
         if ((metadata_presence & METADATA_LOGICAL_SECTOR_SIZE_PRESENT) != 0)
@@ -267,7 +255,7 @@ impl DiskSpec {
     }
 }
 
-#[repr(C, packed)]
+#[repr(packed)]
 #[derive(Default, Debug, Clone, Copy)]
 struct MetadataTableHeader {
     signature: u64,
@@ -298,7 +286,7 @@ impl MetadataTableHeader {
     }
 }
 
-#[repr(C, packed)]
+#[repr(packed)]
 #[derive(Default, Debug, Clone, Copy)]
 pub struct MetadataTableEntry {
     item_id: Uuid,

block/src/vhdx_sync.rs

@@ -2,33 +2,29 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+use crate::async_io::{AsyncIo, AsyncIoResult, DiskFile, DiskFileError, DiskFileResult};
+use crate::vhdx::{Result as VhdxResult, Vhdx};
+use crate::AsyncAdaptor;
 use std::collections::VecDeque;
 use std::fs::File;
-use std::os::fd::AsRawFd;
-
+use std::sync::{Arc, Mutex, MutexGuard};
 use vmm_sys_util::eventfd::EventFd;
 
-use crate::AsyncAdaptor;
-use crate::async_io::{
-    AsyncIo, AsyncIoResult, BorrowedDiskFd, DiskFile, DiskFileError, DiskFileResult,
-};
-use crate::vhdx::{Result as VhdxResult, Vhdx};
-
 pub struct VhdxDiskSync {
-    vhdx_file: Vhdx,
+    vhdx_file: Arc<Mutex<Vhdx>>,
 }
 
 impl VhdxDiskSync {
     pub fn new(f: File) -> VhdxResult<Self> {
         Ok(VhdxDiskSync {
-            vhdx_file: Vhdx::new(f)?,
+            vhdx_file: Arc::new(Mutex::new(Vhdx::new(f)?)),
         })
     }
 }
 
 impl DiskFile for VhdxDiskSync {
     fn size(&mut self) -> DiskFileResult<u64> {
-        Ok(self.vhdx_file.virtual_disk_size())
+        Ok(self.vhdx_file.lock().unwrap().virtual_disk_size())
     }
 
     fn new_async_io(&self, _ring_depth: u32) -> DiskFileResult<Box<dyn AsyncIo>> {
@@ -37,20 +33,16 @@ impl DiskFile for VhdxDiskSync {
                 as Box<dyn AsyncIo>,
         )
     }
-
-    fn fd(&mut self) -> BorrowedDiskFd<'_> {
-        BorrowedDiskFd::new(self.vhdx_file.as_raw_fd())
-    }
 }
 
 pub struct VhdxSync {
-    vhdx_file: Vhdx,
+    vhdx_file: Arc<Mutex<Vhdx>>,
     eventfd: EventFd,
     completion_list: VecDeque<(u64, i32)>,
 }
 
 impl VhdxSync {
-    pub fn new(vhdx_file: Vhdx) -> std::io::Result<Self> {
+    pub fn new(vhdx_file: Arc<Mutex<Vhdx>>) -> std::io::Result<Self> {
         Ok(VhdxSync {
             vhdx_file,
             eventfd: EventFd::new(libc::EFD_NONBLOCK)?,
@@ -59,7 +51,11 @@ impl VhdxSync {
     }
 }
 
-impl AsyncAdaptor for Vhdx {}
+impl AsyncAdaptor<Vhdx> for Arc<Mutex<Vhdx>> {
+    fn file(&mut self) -> MutexGuard<Vhdx> {
+        self.lock().unwrap()
+    }
+}
 
 impl AsyncIo for VhdxSync {
     fn notifier(&self) -> &EventFd {

build.rs

@@ -3,25 +3,17 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-use std::env;
 use std::process::Command;
 
 fn main() {
     let mut version = "v".to_owned() + env!("CARGO_PKG_VERSION");
 
-    if let Ok(git_out) = Command::new("git").args(["describe", "--dirty"]).output()
-        && git_out.status.success()
-        && let Ok(git_out_str) = String::from_utf8(git_out.stdout)
-    {
-        version = git_out_str;
-        // Pop the trailing newline.
-        version.pop();
-    }
-
-    // Append CH_EXTRA_VERSION to version if it is set.
-    if let Ok(extra_version) = env::var("CH_EXTRA_VERSION") {
-        println!("cargo:rerun-if-env-changed=CH_EXTRA_VERSION");
-        version.push_str(&format!("-{extra_version}"));
+    if let Ok(git_out) = Command::new("git").args(["describe", "--dirty"]).output() {
+        if git_out.status.success() {
+            if let Ok(git_out_str) = String::from_utf8(git_out.stdout) {
+                version = git_out_str;
+            }
+        }
     }
 
     // This println!() has a special behavior, as it will set the environment

devices/Cargo.toml

@@ -1,50 +1,32 @@
 [package]
-authors = ["The Chromium OS Authors"]
-edition.workspace = true
 name = "devices"
 version = "0.1.0"
+authors = ["The Chromium OS Authors"]
+edition = "2021"
 
 [dependencies]
-acpi_tables = { workspace = true }
-anyhow = { workspace = true }
+acpi_tables = { git = "https://github.com/rust-vmm/acpi_tables", branch = "main"  }
+anyhow = "1.0.75"
 arch = { path = "../arch" }
-bitfield-struct = { version = "0.10.1", optional = true }
-bitflags = { workspace = true }
-byteorder = { workspace = true }
+bitflags = "2.4.1"
+byteorder = "1.4.3"
 event_monitor = { path = "../event_monitor" }
 hypervisor = { path = "../hypervisor" }
-libc = { workspace = true }
-linux-loader = { workspace = true, features = [
-  "bzimage",
-  "elf",
-  "pe",
-], optional = true }
-log = { workspace = true }
-num_enum = "0.7.2"
+libc = "0.2.147"
+log = "0.4.20"
 pci = { path = "../pci" }
-serde = { workspace = true, features = ["derive"] }
-thiserror = { workspace = true }
+thiserror = "1.0.40"
 tpm = { path = "../tpm" }
+versionize = "0.2.0"
+versionize_derive = "0.1.6"
 vm-allocator = { path = "../vm-allocator" }
 vm-device = { path = "../vm-device" }
-vm-memory = { workspace = true, features = [
-  "backend-atomic",
-  "backend-bitmap",
-  "backend-mmap",
-] }
+vm-memory = "0.14.0"
 vm-migration = { path = "../vm-migration" }
-vmm-sys-util = { workspace = true }
-zerocopy = { version = "0.8.26", features = [
-  "alloc",
-  "derive",
-], optional = true }
+vmm-sys-util = "0.12.1"
 
-[target.'cfg(any(target_arch = "aarch64", target_arch = "riscv64"))'.dependencies]
+[target.'cfg(target_arch = "aarch64")'.dependencies]
 arch = { path = "../arch" }
 
 [features]
 default = []
-fw_cfg = ["arch/fw_cfg", "bitfield-struct", "linux-loader", "zerocopy"]
-ivshmem = []
-kvm = ["arch/kvm"]
-pvmemcontrol = []

devices/src/acpi.rs

@@ -3,19 +3,17 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
+use super::AcpiNotificationFlags;
+use acpi_tables::{aml, Aml, AmlSink};
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Barrier};
 use std::thread;
 use std::time::Instant;
-
-use acpi_tables::{Aml, AmlSink, aml};
-use vm_device::BusDevice;
 use vm_device::interrupt::InterruptSourceGroup;
+use vm_device::BusDevice;
 use vm_memory::GuestAddress;
 use vmm_sys_util::eventfd::EventFd;
 
-use super::AcpiNotificationFlags;
-
 pub const GED_DEVICE_ACPI_SIZE: usize = 0x1;
 
 /// A device for handling ACPI shutdown and reboot

devices/src/aia.rs

@@ -1,144 +0,0 @@
-// Copyright © 2024 Institute of Software, CAS. All rights reserved.
-// Copyright 2020, ARM Limited.
-//
-// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
-
-use super::interrupt_controller::{Error, InterruptController};
-extern crate arch;
-use std::result;
-use std::sync::{Arc, Mutex};
-
-use arch::layout;
-use hypervisor::arch::riscv64::aia::{Vaia, VaiaConfig};
-use hypervisor::{AiaState, CpuState};
-use vm_device::interrupt::{
-    InterruptIndex, InterruptManager, InterruptSourceConfig, InterruptSourceGroup,
-    LegacyIrqSourceConfig, MsiIrqGroupConfig,
-};
-use vm_memory::address::Address;
-use vm_migration::{Migratable, Pausable, Snapshottable, Transportable};
-use vmm_sys_util::eventfd::EventFd;
-
-type Result<T> = result::Result<T, Error>;
-
-// Reserve 32 IRQs for legacy devices.
-pub const IRQ_LEGACY_BASE: usize = layout::IRQ_BASE as usize;
-pub const IRQ_LEGACY_COUNT: usize = 32;
-// TODO: AIA snapshotting is not yet completed.
-pub const _AIA_SNAPSHOT_ID: &str = "";
-
-// Aia (Advance Interrupt Architecture) struct provides all the functionality of a
-// AIA device. It wraps a hypervisor-emulated AIA device (Vaia) provided by the
-// `hypervisor` crate.
-// Aia struct also implements InterruptController to provide interrupt delivery
-// service.
-pub struct Aia {
-    interrupt_source_group: Arc<dyn InterruptSourceGroup>,
-    // The hypervisor agnostic virtual AIA
-    vaia: Arc<Mutex<dyn Vaia>>,
-}
-
-impl Aia {
-    pub fn new(
-        vcpu_count: u32,
-        interrupt_manager: Arc<dyn InterruptManager<GroupConfig = MsiIrqGroupConfig>>,
-        vm: Arc<dyn hypervisor::Vm>,
-    ) -> Result<Aia> {
-        let interrupt_source_group = interrupt_manager
-            .create_group(MsiIrqGroupConfig {
-                base: IRQ_LEGACY_BASE as InterruptIndex,
-                count: IRQ_LEGACY_COUNT as InterruptIndex,
-            })
-            .map_err(Error::CreateInterruptSourceGroup)?;
-
-        let vaia = vm
-            .create_vaia(Aia::create_default_config(vcpu_count as u64))
-            .map_err(Error::CreateAia)?;
-
-        let aia = Aia {
-            interrupt_source_group,
-            vaia,
-        };
-        aia.enable()?;
-
-        Ok(aia)
-    }
-
-    pub fn restore_vaia(
-        &mut self,
-        state: Option<AiaState>,
-        _saved_vcpu_states: &[CpuState],
-    ) -> Result<()> {
-        self.vaia
-            .clone()
-            .lock()
-            .unwrap()
-            .set_state(&state.unwrap())
-            .map_err(Error::RestoreAia)
-    }
-
-    fn enable(&self) -> Result<()> {
-        // Set irqfd for legacy interrupts
-        self.interrupt_source_group
-            .enable()
-            .map_err(Error::EnableInterrupt)?;
-
-        // Set irq_routing for legacy interrupts.
-        //   irqchip: Hardcode to 0 as we support only 1 APLIC
-        //   pin: Use irq number as pin
-        for i in IRQ_LEGACY_BASE..(IRQ_LEGACY_BASE + IRQ_LEGACY_COUNT) {
-            let config = LegacyIrqSourceConfig {
-                irqchip: 0,
-                pin: (i - IRQ_LEGACY_BASE) as u32,
-            };
-            self.interrupt_source_group
-                .update(
-                    i as InterruptIndex,
-                    InterruptSourceConfig::LegacyIrq(config),
-                    false,
-                    false,
-                )
-                .map_err(Error::EnableInterrupt)?;
-        }
-
-        self.interrupt_source_group
-            .set_gsi()
-            .map_err(Error::EnableInterrupt)?;
-        Ok(())
-    }
-
-    /// Default config implied by arch::layout
-    pub fn create_default_config(vcpu_count: u64) -> VaiaConfig {
-        VaiaConfig {
-            vcpu_count: vcpu_count as u32,
-            aplic_addr: layout::APLIC_START.raw_value(),
-            imsic_addr: layout::IMSIC_START.raw_value(),
-            nr_irqs: layout::IRQ_NUM,
-        }
-    }
-
-    pub fn get_vaia(&mut self) -> Result<Arc<Mutex<dyn Vaia>>> {
-        Ok(self.vaia.clone())
-    }
-}
-
-impl InterruptController for Aia {
-    // This should be called anytime an interrupt needs to be injected into the
-    // running guest.
-    fn service_irq(&mut self, irq: usize) -> Result<()> {
-        self.interrupt_source_group
-            .trigger(irq as InterruptIndex)
-            .map_err(Error::TriggerInterrupt)?;
-
-        Ok(())
-    }
-
-    fn notifier(&self, irq: usize) -> Option<EventFd> {
-        self.interrupt_source_group.notifier(irq as InterruptIndex)
-    }
-}
-
-impl Snapshottable for Aia {}
-impl Pausable for Aia {}
-impl Transportable for Aia {}
-impl Migratable for Aia {}

devices/src/debug_console.rs

@@ -1,65 +0,0 @@
-// Copyright © 2023 Cyberus Technology
-//
-// SPDX-License-Identifier: Apache-2.0
-//
-
-//! Module for [`DebugconState`].
-
-use std::io;
-use std::io::Write;
-use std::sync::{Arc, Barrier};
-
-use vm_device::BusDevice;
-use vm_migration::{Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
-
-/// I/O-port.
-pub const DEFAULT_PORT: u64 = 0xe9;
-
-#[derive(Default)]
-pub struct DebugconState {}
-
-/// Emulates a debug console similar to the QEMU debugcon device. This device
-/// is stateless and only prints the bytes (usually text) that are written to
-/// it.
-///
-/// This device is only available on x86.
-///
-/// Reference:
-/// - https://github.com/qemu/qemu/blob/master/hw/char/debugcon.c
-/// - https://phip1611.de/blog/how-to-use-qemus-debugcon-feature-and-write-to-a-file/
-pub struct DebugConsole {
-    id: String,
-    out: Box<dyn io::Write + Send>,
-}
-
-impl DebugConsole {
-    pub fn new(id: String, out: Box<dyn io::Write + Send>) -> Self {
-        Self { id, out }
-    }
-}
-
-impl BusDevice for DebugConsole {
-    fn read(&mut self, _base: u64, _offset: u64, _data: &mut [u8]) {}
-
-    fn write(&mut self, _base: u64, _offset: u64, data: &[u8]) -> Option<Arc<Barrier>> {
-        if let Err(e) = self.out.write_all(data) {
-            // unlikely
-            error!("debug-console: failed writing data: {e:?}");
-        }
-        None
-    }
-}
-
-impl Snapshottable for DebugConsole {
-    fn id(&self) -> String {
-        self.id.clone()
-    }
-
-    fn snapshot(&mut self) -> Result<Snapshot, MigratableError> {
-        Snapshot::new_from_state(&())
-    }
-}
-
-impl Pausable for DebugConsole {}
-impl Transportable for DebugConsole {}
-impl Migratable for DebugConsole {}

devices/src/gic.rs

@@ -4,13 +4,14 @@
 
 use super::interrupt_controller::{Error, InterruptController};
 extern crate arch;
-use std::result;
-use std::sync::{Arc, Mutex};
-
 use anyhow::anyhow;
 use arch::layout;
-use hypervisor::CpuState;
-use hypervisor::arch::aarch64::gic::{GicState, Vgic, VgicConfig};
+use hypervisor::{
+    arch::aarch64::gic::{Vgic, VgicConfig},
+    CpuState, GicState,
+};
+use std::result;
+use std::sync::{Arc, Mutex};
 use vm_device::interrupt::{
     InterruptIndex, InterruptManager, InterruptSourceConfig, InterruptSourceGroup,
     LegacyIrqSourceConfig, MsiIrqGroupConfig,
@@ -39,7 +40,7 @@ pub struct Gic {
 
 impl Gic {
     pub fn new(
-        vcpu_count: u32,
+        vcpu_count: u8,
         interrupt_manager: Arc<dyn InterruptManager<GroupConfig = MsiIrqGroupConfig>>,
         vm: Arc<dyn hypervisor::Vm>,
     ) -> Result<Gic> {

devices/src/interrupt_controller.rs

@@ -1,55 +1,35 @@
-// Copyright © 2024 Institute of Software, CAS. All rights reserved.
 // Copyright 2020, ARM Limited.
 //
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
-use std::{io, result};
-
-use thiserror::Error;
+use std::io;
+use std::result;
 use vmm_sys_util::eventfd::EventFd;
 
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
     /// Invalid trigger mode.
-    #[error("Invalid trigger mode")]
     InvalidTriggerMode,
     /// Invalid delivery mode.
-    #[error("Invalid delivery mode")]
     InvalidDeliveryMode,
     /// Failed creating the interrupt source group.
-    #[error("Failed creating the interrupt source group")]
-    CreateInterruptSourceGroup(#[source] io::Error),
+    CreateInterruptSourceGroup(io::Error),
     /// Failed triggering the interrupt.
-    #[error("Failed triggering the interrupt")]
-    TriggerInterrupt(#[source] io::Error),
+    TriggerInterrupt(io::Error),
     /// Failed masking the interrupt.
-    #[error("Failed masking the interrupt")]
-    MaskInterrupt(#[source] io::Error),
+    MaskInterrupt(io::Error),
     /// Failed unmasking the interrupt.
-    #[error("Failed unmasking the interrupt")]
-    UnmaskInterrupt(#[source] io::Error),
+    UnmaskInterrupt(io::Error),
     /// Failed updating the interrupt.
-    #[error("Failed updating the interrupt")]
-    UpdateInterrupt(#[source] io::Error),
+    UpdateInterrupt(io::Error),
     /// Failed enabling the interrupt.
-    #[error("Failed enabling the interrupt")]
-    EnableInterrupt(#[source] io::Error),
+    EnableInterrupt(io::Error),
     #[cfg(target_arch = "aarch64")]
     /// Failed creating GIC device.
-    #[error("Failed creating GIC device")]
-    CreateGic(#[source] hypervisor::HypervisorVmError),
+    CreateGic(hypervisor::HypervisorVmError),
     #[cfg(target_arch = "aarch64")]
     /// Failed restoring GIC device.
-    #[error("Failed restoring GIC device")]
-    RestoreGic(#[source] hypervisor::arch::aarch64::gic::Error),
-    #[cfg(target_arch = "riscv64")]
-    /// Failed creating AIA device.
-    #[error("Failed creating AIA device")]
-    CreateAia(#[source] hypervisor::HypervisorVmError),
-    #[cfg(target_arch = "riscv64")]
-    /// Failed restoring AIA device.
-    #[error("Failed restoring AIA device")]
-    RestoreAia(#[source] hypervisor::arch::riscv64::aia::Error),
+    RestoreGic(hypervisor::arch::aarch64::gic::Error),
 }
 
 type Result<T> = result::Result<T, Error>;
@@ -76,7 +56,7 @@ pub struct MsiMessage {
 // Introduce trait InterruptController to uniform the interrupt
 // service provided for devices.
 // Device manager uses this trait without caring whether it is a
-// IOAPIC (X86), GIC (Arm) or AIA (RISC-V).
+// IOAPIC (X86) or GIC (Arm).
 pub trait InterruptController: Send {
     fn service_irq(&mut self, irq: usize) -> Result<()>;
     #[cfg(target_arch = "x86_64")]

devices/src/ioapic.rs

@@ -9,22 +9,23 @@
 // Implementation of an intel 82093AA Input/Output Advanced Programmable Interrupt Controller
 // See https://pdos.csail.mit.edu/6.828/2016/readings/ia32/ioapic.pdf for a specification.
 
+use super::interrupt_controller::{Error, InterruptController};
+use byteorder::{ByteOrder, LittleEndian};
 use std::result;
 use std::sync::{Arc, Barrier};
-
-use byteorder::{ByteOrder, LittleEndian};
-use serde::{Deserialize, Serialize};
-use vm_device::BusDevice;
+use versionize::{VersionMap, Versionize, VersionizeResult};
+use versionize_derive::Versionize;
 use vm_device::interrupt::{
     InterruptIndex, InterruptManager, InterruptSourceConfig, InterruptSourceGroup,
     MsiIrqGroupConfig, MsiIrqSourceConfig,
 };
+use vm_device::BusDevice;
 use vm_memory::GuestAddress;
-use vm_migration::{Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
+use vm_migration::{
+    Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable, VersionMapped,
+};
 use vmm_sys_util::eventfd::EventFd;
 
-use super::interrupt_controller::{Error, InterruptController};
-
 type Result<T> = result::Result<T, Error>;
 
 // I/O REDIRECTION TABLE REGISTER
@@ -135,7 +136,7 @@ pub struct Ioapic {
     interrupt_source_group: Arc<dyn InterruptSourceGroup>,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Versionize)]
 pub struct IoapicState {
     id_reg: u32,
     reg_sel: u32,
@@ -143,6 +144,7 @@ pub struct IoapicState {
     used_entries: [bool; NUM_IOAPIC_PINS],
     apic_address: u64,
 }
+impl VersionMapped for IoapicState {}
 
 impl BusDevice for Ioapic {
     fn read(&mut self, _base: u64, offset: u64, data: &mut [u8]) {
@@ -346,9 +348,9 @@ impl Ioapic {
 
         // Generate MSI message address
         let low_addr: u32 = self.apic_address.0 as u32
-            | (u32::from(destination_id) << 12)
-            | (u32::from(redirection_hint) << 3)
-            | (u32::from(destination_mode) << 2);
+            | u32::from(destination_id) << 12
+            | u32::from(redirection_hint) << 3
+            | u32::from(destination_mode) << 2;
 
         // Validate Trigger Mode value
         let trigger_mode = trigger_mode(entry);
@@ -372,9 +374,9 @@ impl Ioapic {
         }
 
         // Generate MSI message data
-        let data: u32 = (u32::from(trigger_mode) << 15)
-            | (u32::from(remote_irr(entry)) << 14)
-            | (u32::from(delivery_mode) << 8)
+        let data: u32 = u32::from(trigger_mode) << 15
+            | u32::from(remote_irr(entry)) << 14
+            | u32::from(delivery_mode) << 8
             | u32::from(vector(entry));
 
         let config = MsiIrqSourceConfig {
@@ -418,7 +420,7 @@ impl InterruptController for Ioapic {
         self.interrupt_source_group
             .trigger(irq as InterruptIndex)
             .map_err(Error::TriggerInterrupt)?;
-        trace!("Interrupt {irq} successfully delivered");
+        debug!("Interrupt successfully delivered");
 
         // If trigger mode is level sensitive, set the Remote IRR bit.
         // It will be cleared when the EOI is received.
@@ -442,7 +444,7 @@ impl Snapshottable for Ioapic {
     }
 
     fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
-        Snapshot::new_from_state(&self.state())
+        Snapshot::new_from_versioned_state(&self.state())
     }
 }
 

devices/src/ivshmem.rs

@@ -1,420 +0,0 @@
-// Copyright © 2024 Tencent Corporation. All rights reserved.
-//
-// SPDX-License-Identifier: Apache-2.0
-//
-
-use std::any::Any;
-use std::path::PathBuf;
-use std::result;
-use std::sync::atomic::{AtomicU32, Ordering};
-use std::sync::{Arc, Barrier, Mutex};
-
-use anyhow::anyhow;
-use byteorder::{ByteOrder, LittleEndian};
-use pci::{
-    BarReprogrammingParams, PCI_CONFIGURATION_ID, PciBarConfiguration, PciBarPrefetchable,
-    PciBarRegionType, PciClassCode, PciConfiguration, PciDevice, PciDeviceError, PciHeaderType,
-    PciSubclass,
-};
-use serde::{Deserialize, Serialize};
-use thiserror::Error;
-use vm_allocator::{AddressAllocator, SystemAllocator};
-use vm_device::{BusDevice, Resource, UserspaceMapping};
-use vm_memory::bitmap::AtomicBitmap;
-use vm_memory::{Address, GuestAddress};
-use vm_migration::{Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
-
-const IVSHMEM_BAR0_IDX: usize = 0;
-const IVSHMEM_BAR1_IDX: usize = 1;
-const IVSHMEM_BAR2_IDX: usize = 2;
-
-const IVSHMEM_VENDOR_ID: u16 = 0x1af4;
-const IVSHMEM_DEVICE_ID: u16 = 0x1110;
-
-const IVSHMEM_REG_BAR_SIZE: u64 = 0x100;
-
-type GuestRegionMmap = vm_memory::GuestRegionMmap<AtomicBitmap>;
-
-#[derive(Debug, Error)]
-pub enum IvshmemError {
-    #[error("Failed to retrieve PciConfigurationState: {0}")]
-    RetrievePciConfigurationState(#[source] anyhow::Error),
-    #[error("Failed to retrieve IvshmemDeviceState: {0}")]
-    RetrieveIvshmemDeviceStateState(#[source] anyhow::Error),
-    #[error("Failed to remove user memory region")]
-    RemoveUserMemoryRegion,
-    #[error("Failed to create user memory region.")]
-    CreateUserMemoryRegion,
-    #[error("Failed to create userspace mapping.")]
-    CreateUserspaceMapping,
-    #[error("Failed to remove old userspace mapping.")]
-    RemoveUserspaceMapping,
-}
-
-#[derive(Copy, Clone)]
-pub enum IvshmemSubclass {
-    Other = 0x00,
-}
-
-impl PciSubclass for IvshmemSubclass {
-    fn get_register_value(&self) -> u8 {
-        *self as u8
-    }
-}
-
-pub trait IvshmemOps: Send + Sync {
-    fn map_ram_region(
-        &mut self,
-        start_addr: u64,
-        size: usize,
-        backing_file: Option<PathBuf>,
-    ) -> Result<(Arc<GuestRegionMmap>, UserspaceMapping), IvshmemError>;
-
-    fn unmap_ram_region(&mut self, mapping: UserspaceMapping) -> Result<(), IvshmemError>;
-}
-
-/// Inner-Vm Shared Memory Device (Ivshmem device)
-///
-/// This device can share memory between host and guest(ivshmem-plain)
-/// and share memory between guests(ivshmem-doorbell).
-/// But only ivshmem-plain support now, ivshmem-doorbell doesn't support yet.
-pub struct IvshmemDevice {
-    id: String,
-
-    // ivshmem device registers
-    // (only used for ivshmem-doorbell, ivshmem-doorbell don't support yet)
-    _interrupt_mask: u32,
-    _interrupt_status: Arc<AtomicU32>,
-    _iv_position: u32,
-    _doorbell: u32,
-
-    // PCI configuration registers.
-    configuration: PciConfiguration,
-    bar_regions: Vec<PciBarConfiguration>,
-
-    region_size: u64,
-    ivshmem_ops: Arc<Mutex<dyn IvshmemOps>>,
-    backend_file: Option<PathBuf>,
-    region: Option<Arc<GuestRegionMmap>>,
-    userspace_mapping: Option<UserspaceMapping>,
-}
-
-#[derive(Serialize, Deserialize, Default, Clone)]
-pub struct IvshmemDeviceState {
-    interrupt_mask: u32,
-    interrupt_status: u32,
-    iv_position: u32,
-    doorbell: u32,
-}
-
-impl IvshmemDevice {
-    pub fn new(
-        id: String,
-        region_size: u64,
-        backend_file: Option<PathBuf>,
-        ivshmem_ops: Arc<Mutex<dyn IvshmemOps>>,
-        snapshot: Option<Snapshot>,
-    ) -> Result<Self, IvshmemError> {
-        let pci_configuration_state =
-            vm_migration::state_from_id(snapshot.as_ref(), PCI_CONFIGURATION_ID).map_err(|e| {
-                IvshmemError::RetrievePciConfigurationState(anyhow!(
-                    "Failed to get PciConfigurationState from Snapshot: {e}",
-                ))
-            })?;
-
-        let state: Option<IvshmemDeviceState> = snapshot
-            .as_ref()
-            .map(|s| s.to_state())
-            .transpose()
-            .map_err(|e| {
-                IvshmemError::RetrieveIvshmemDeviceStateState(anyhow!(
-                    "Failed to get IvshmemDeviceState from Snapshot: {e}",
-                ))
-            })?;
-
-        let configuration = PciConfiguration::new(
-            IVSHMEM_VENDOR_ID,
-            IVSHMEM_DEVICE_ID,
-            0x1,
-            PciClassCode::MemoryController,
-            &IvshmemSubclass::Other,
-            None,
-            PciHeaderType::Device,
-            0,
-            0,
-            None,
-            pci_configuration_state,
-        );
-
-        let device = if let Some(s) = state {
-            IvshmemDevice {
-                id,
-                configuration,
-                bar_regions: vec![],
-                _interrupt_mask: s.interrupt_mask,
-                _interrupt_status: Arc::new(AtomicU32::new(s.interrupt_status)),
-                _iv_position: s.iv_position,
-                _doorbell: s.doorbell,
-                region_size,
-                ivshmem_ops,
-                region: None,
-                userspace_mapping: None,
-                backend_file,
-            }
-        } else {
-            IvshmemDevice {
-                id,
-                configuration,
-                bar_regions: vec![],
-                _interrupt_mask: 0,
-                _interrupt_status: Arc::new(AtomicU32::new(0)),
-                _iv_position: 0,
-                _doorbell: 0,
-                region_size,
-                ivshmem_ops,
-                region: None,
-                userspace_mapping: None,
-                backend_file,
-            }
-        };
-        Ok(device)
-    }
-
-    pub fn set_region(
-        &mut self,
-        region: Arc<GuestRegionMmap>,
-        userspace_mapping: UserspaceMapping,
-    ) {
-        self.region = Some(region);
-        self.userspace_mapping = Some(userspace_mapping);
-    }
-
-    pub fn config_bar_addr(&self) -> u64 {
-        self.configuration.get_bar_addr(IVSHMEM_BAR0_IDX)
-    }
-
-    pub fn data_bar_addr(&self) -> u64 {
-        self.configuration.get_bar_addr(IVSHMEM_BAR2_IDX)
-    }
-
-    fn state(&self) -> IvshmemDeviceState {
-        IvshmemDeviceState {
-            interrupt_mask: self._interrupt_mask,
-            interrupt_status: self._interrupt_status.load(Ordering::SeqCst),
-            iv_position: self._iv_position,
-            doorbell: self._doorbell,
-        }
-    }
-}
-
-impl BusDevice for IvshmemDevice {
-    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)
-    }
-}
-
-impl PciDevice for IvshmemDevice {
-    fn allocate_bars(
-        &mut self,
-        _allocator: &Arc<Mutex<SystemAllocator>>,
-        mmio32_allocator: &mut AddressAllocator,
-        mmio64_allocator: &mut AddressAllocator,
-        resources: Option<Vec<Resource>>,
-    ) -> std::result::Result<Vec<PciBarConfiguration>, PciDeviceError> {
-        let mut bars = Vec::new();
-        let mut bar0_addr = None;
-        let mut bar2_addr = None;
-
-        let restoring = resources.is_some();
-        if let Some(resources) = resources {
-            for resource in resources {
-                match resource {
-                    Resource::PciBar { index, base, .. } => {
-                        match index {
-                            IVSHMEM_BAR0_IDX => {
-                                bar0_addr = Some(GuestAddress(base));
-                            }
-                            IVSHMEM_BAR1_IDX => {}
-                            IVSHMEM_BAR2_IDX => {
-                                bar2_addr = Some(GuestAddress(base));
-                            }
-                            _ => {
-                                error!("Unexpected pci bar index {index}");
-                            }
-                        };
-                    }
-                    _ => {
-                        error!("Unexpected resource {resource:?}");
-                    }
-                }
-            }
-            if bar0_addr.is_none() || bar2_addr.is_none() {
-                return Err(PciDeviceError::MissingResource);
-            }
-        }
-
-        // BAR0 holds device registers (256 Byte MMIO)
-        let bar0_addr = mmio32_allocator
-            .allocate(bar0_addr, IVSHMEM_REG_BAR_SIZE, None)
-            .ok_or(PciDeviceError::IoAllocationFailed(IVSHMEM_REG_BAR_SIZE))?;
-        debug!("ivshmem bar0 address 0x{:x}", bar0_addr.0);
-
-        let bar0 = PciBarConfiguration::default()
-            .set_index(IVSHMEM_BAR0_IDX)
-            .set_address(bar0_addr.raw_value())
-            .set_size(IVSHMEM_REG_BAR_SIZE)
-            .set_region_type(PciBarRegionType::Memory32BitRegion)
-            .set_prefetchable(PciBarPrefetchable::NotPrefetchable);
-
-        // BAR1 holds MSI-X table and PBA (only ivshmem-doorbell).
-
-        // BAR2 maps the shared memory object
-        let bar2_size = self.region_size;
-        let bar2_addr = mmio64_allocator
-            .allocate(bar2_addr, bar2_size, None)
-            .ok_or(PciDeviceError::IoAllocationFailed(bar2_size))?;
-        debug!("ivshmem bar2 address 0x{:x}", bar2_addr.0);
-
-        let bar2 = PciBarConfiguration::default()
-            .set_index(IVSHMEM_BAR2_IDX)
-            .set_address(bar2_addr.raw_value())
-            .set_size(bar2_size)
-            .set_region_type(PciBarRegionType::Memory64BitRegion)
-            .set_prefetchable(PciBarPrefetchable::Prefetchable);
-
-        if !restoring {
-            self.configuration
-                .add_pci_bar(&bar0)
-                .map_err(|e| PciDeviceError::IoRegistrationFailed(bar0_addr.raw_value(), e))?;
-            self.configuration
-                .add_pci_bar(&bar2)
-                .map_err(|e| PciDeviceError::IoRegistrationFailed(bar2_addr.raw_value(), e))?;
-        }
-
-        bars.push(bar0);
-        bars.push(bar2);
-        self.bar_regions = bars.clone();
-
-        Ok(bars)
-    }
-
-    fn free_bars(
-        &mut self,
-        _allocator: &mut SystemAllocator,
-        _mmio32_allocator: &mut AddressAllocator,
-        _mmio64_allocator: &mut AddressAllocator,
-    ) -> std::result::Result<(), PciDeviceError> {
-        unimplemented!("Device hotplug  and remove are not supported for ivshmem");
-    }
-
-    fn write_config_register(
-        &mut self,
-        reg_idx: usize,
-        offset: u64,
-        data: &[u8],
-    ) -> (Vec<BarReprogrammingParams>, Option<Arc<Barrier>>) {
-        (
-            self.configuration
-                .write_config_register(reg_idx, offset, data),
-            None,
-        )
-    }
-
-    fn read_config_register(&mut self, reg_idx: usize) -> u32 {
-        self.configuration.read_reg(reg_idx)
-    }
-
-    fn read_bar(&mut self, base: u64, offset: u64, data: &mut [u8]) {
-        debug!("read base {base:x} offset {offset}");
-
-        let mut bar_idx = 0;
-        for (idx, bar) in self.bar_regions.iter().enumerate() {
-            if bar.addr() == base {
-                bar_idx = idx;
-            }
-        }
-        match bar_idx {
-            // bar 0
-            0 => {
-                // ivshmem don't use interrupt, we return zero now.
-                LittleEndian::write_u32(data, 0);
-            }
-            // bar 2
-            1 => warn!("Unexpected read ivshmem memory idx: {offset}"),
-            _ => {
-                warn!("Invalid bar_idx: {bar_idx}");
-            }
-        };
-    }
-
-    fn write_bar(&mut self, base: u64, offset: u64, _data: &[u8]) -> Option<Arc<Barrier>> {
-        debug!("write base {base:x} offset {offset}");
-        warn!("Unexpected write ivshmem memory idx: {offset}");
-        None
-    }
-
-    fn move_bar(&mut self, old_base: u64, new_base: u64) -> result::Result<(), std::io::Error> {
-        if new_base == self.data_bar_addr() {
-            if let Some(old_mapping) = self.userspace_mapping.take() {
-                self.ivshmem_ops
-                    .lock()
-                    .unwrap()
-                    .unmap_ram_region(old_mapping)
-                    .map_err(std::io::Error::other)?;
-            }
-            let (region, new_mapping) = self
-                .ivshmem_ops
-                .lock()
-                .unwrap()
-                .map_ram_region(
-                    new_base,
-                    self.region_size as usize,
-                    self.backend_file.clone(),
-                )
-                .map_err(std::io::Error::other)?;
-            self.set_region(region, new_mapping);
-        }
-        for bar in self.bar_regions.iter_mut() {
-            if bar.addr() == old_base {
-                *bar = bar.set_address(new_base);
-            }
-        }
-
-        Ok(())
-    }
-
-    fn as_any_mut(&mut self) -> &mut dyn Any {
-        self
-    }
-
-    fn id(&self) -> Option<String> {
-        Some(self.id.clone())
-    }
-}
-
-impl Pausable for IvshmemDevice {}
-
-impl Snapshottable for IvshmemDevice {
-    fn id(&self) -> String {
-        self.id.clone()
-    }
-
-    // The snapshot/restore (also live migration) support only work for ivshmem-plain mode.
-    // Additional work is needed for supporting ivshmem-doorbell.
-    fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
-        let mut snapshot = Snapshot::new_from_state(&self.state())?;
-
-        // Snapshot PciConfiguration
-        snapshot.add_snapshot(self.configuration.id(), self.configuration.snapshot()?);
-
-        Ok(snapshot)
-    }
-}
-
-impl Transportable for IvshmemDevice {}
-
-impl Migratable for IvshmemDevice {}

devices/src/legacy/cmos.rs

@@ -1,20 +1,19 @@
 // Copyright 2017 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
+use libc::{clock_gettime, gmtime_r, timespec, tm, CLOCK_REALTIME};
 use std::cmp::min;
+use std::mem;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Barrier};
-use std::{mem, thread};
+use std::thread;
+use vm_device::BusDevice;
+use vmm_sys_util::eventfd::EventFd;
 
 // https://github.com/rust-lang/libc/issues/1848
 #[cfg_attr(target_env = "musl", allow(deprecated))]
 use libc::time_t;
-use libc::{CLOCK_REALTIME, clock_gettime, gmtime_r, timespec, tm};
-use vm_device::BusDevice;
-use vmm_sys_util::eventfd::EventFd;
 
 const INDEX_MASK: u8 = 0x7f;
 const INDEX_OFFSET: u64 = 0x0;
@@ -152,7 +151,7 @@ impl BusDevice for Cmos {
                     0x08 => to_bcd(month as u8),
                     0x09 => to_bcd((year % 100) as u8),
                     // Bit 5 for 32kHz clock. Bit 7 for Update in Progress
-                    0x0a => (1 << 5) | ((update_in_progress as u8) << 7),
+                    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,

devices/src/legacy/debug_port.rs

@@ -5,7 +5,6 @@
 
 use std::fmt;
 use std::time::Instant;
-
 use vm_device::BusDevice;
 
 /// Debug I/O port, see:

devices/src/legacy/fw_cfg.rs

@@ -1,954 +0,0 @@
-// Copyright 2025 Google LLC.
-//
-// SPDX-License-Identifier: Apache-2.0
-//
-
-/// Cloud Hypervisor implementation of Qemu's fw_cfg spec
-/// https://www.qemu.org/docs/master/specs/fw_cfg.html
-/// Linux kernel fw_cfg driver header
-/// https://github.com/torvalds/linux/blob/master/include/uapi/linux/qemu_fw_cfg.h
-/// Uploading files to the guest via fw_cfg is supported for all kernels 4.6+ w/ CONFIG_FW_CFG_SYSFS enabled
-/// https://cateee.net/lkddb/web-lkddb/FW_CFG_SYSFS.html
-/// No kernel requirement if above functionality is not required,
-/// only firmware must implement mechanism to interact with this fw_cfg device
-use std::{
-    fs::File,
-    io::{ErrorKind, Read, Result, Seek, SeekFrom},
-    mem::offset_of,
-    os::unix::fs::FileExt,
-    sync::{Arc, Barrier},
-};
-
-use acpi_tables::rsdp::Rsdp;
-use arch::RegionType;
-#[cfg(target_arch = "aarch64")]
-use arch::aarch64::layout::{
-    MEM_32BIT_DEVICES_START, MEM_32BIT_RESERVED_START, RAM_64BIT_START, RAM_START as HIGH_RAM_START,
-};
-#[cfg(target_arch = "x86_64")]
-use arch::layout::{
-    EBDA_START, HIGH_RAM_START, MEM_32BIT_DEVICES_SIZE, MEM_32BIT_DEVICES_START,
-    MEM_32BIT_RESERVED_START, PCI_MMCONFIG_SIZE, PCI_MMCONFIG_START, RAM_64BIT_START,
-};
-use bitfield_struct::bitfield;
-#[cfg(target_arch = "x86_64")]
-use linux_loader::bootparam::boot_params;
-#[cfg(target_arch = "aarch64")]
-use linux_loader::loader::pe::arm64_image_header as boot_params;
-use vm_device::BusDevice;
-use vm_memory::bitmap::AtomicBitmap;
-use vm_memory::{
-    ByteValued, Bytes, GuestAddress, GuestAddressSpace, GuestMemoryAtomic, GuestMemoryMmap,
-};
-use vmm_sys_util::sock_ctrl_msg::IntoIovec;
-use zerocopy::{FromBytes, FromZeros, Immutable, IntoBytes};
-
-#[cfg(target_arch = "x86_64")]
-// https://github.com/project-oak/oak/tree/main/stage0_bin#memory-layout
-const STAGE0_START_ADDRESS: GuestAddress = GuestAddress(0xfffe_0000);
-#[cfg(target_arch = "x86_64")]
-const STAGE0_SIZE: usize = 0x2_0000;
-const E820_RAM: u32 = 1;
-const E820_RESERVED: u32 = 2;
-
-#[cfg(target_arch = "x86_64")]
-const PORT_FW_CFG_SELECTOR: u64 = 0x510;
-#[cfg(target_arch = "x86_64")]
-const PORT_FW_CFG_DATA: u64 = 0x511;
-#[cfg(target_arch = "x86_64")]
-const PORT_FW_CFG_DMA_HI: u64 = 0x514;
-#[cfg(target_arch = "x86_64")]
-const PORT_FW_CFG_DMA_LO: u64 = 0x518;
-#[cfg(target_arch = "x86_64")]
-pub const PORT_FW_CFG_BASE: u64 = 0x510;
-#[cfg(target_arch = "x86_64")]
-pub const PORT_FW_CFG_WIDTH: u64 = 0xc;
-#[cfg(target_arch = "aarch64")]
-const PORT_FW_CFG_SELECTOR: u64 = 0x9030008;
-#[cfg(target_arch = "aarch64")]
-const PORT_FW_CFG_DATA: u64 = 0x9030000;
-#[cfg(target_arch = "aarch64")]
-const PORT_FW_CFG_DMA_HI: u64 = 0x9030010;
-#[cfg(target_arch = "aarch64")]
-const PORT_FW_CFG_DMA_LO: u64 = 0x9030014;
-#[cfg(target_arch = "aarch64")]
-pub const PORT_FW_CFG_BASE: u64 = 0x9030000;
-#[cfg(target_arch = "aarch64")]
-pub const PORT_FW_CFG_WIDTH: u64 = 0x10;
-
-const FW_CFG_SIGNATURE: u16 = 0x00;
-const FW_CFG_ID: u16 = 0x01;
-const FW_CFG_KERNEL_SIZE: u16 = 0x08;
-const FW_CFG_INITRD_SIZE: u16 = 0x0b;
-const FW_CFG_KERNEL_DATA: u16 = 0x11;
-const FW_CFG_INITRD_DATA: u16 = 0x12;
-const FW_CFG_CMDLINE_SIZE: u16 = 0x14;
-const FW_CFG_CMDLINE_DATA: u16 = 0x15;
-const FW_CFG_SETUP_SIZE: u16 = 0x17;
-const FW_CFG_SETUP_DATA: u16 = 0x18;
-const FW_CFG_FILE_DIR: u16 = 0x19;
-const FW_CFG_KNOWN_ITEMS: usize = 0x20;
-
-pub const FW_CFG_FILE_FIRST: u16 = 0x20;
-pub const FW_CFG_DMA_SIGNATURE: [u8; 8] = *b"QEMU CFG";
-// https://github.com/torvalds/linux/blob/master/include/uapi/linux/qemu_fw_cfg.h
-pub const FW_CFG_ACPI_ID: &str = "QEMU0002";
-// Reserved (must be enabled)
-const FW_CFG_F_RESERVED: u8 = 1 << 0;
-// DMA Toggle Bit (enabled by default)
-const FW_CFG_F_DMA: u8 = 1 << 1;
-pub const FW_CFG_FEATURE: [u8; 4] = [FW_CFG_F_RESERVED | FW_CFG_F_DMA, 0, 0, 0];
-
-const COMMAND_ALLOCATE: u32 = 0x1;
-const COMMAND_ADD_POINTER: u32 = 0x2;
-const COMMAND_ADD_CHECKSUM: u32 = 0x3;
-
-const ALLOC_ZONE_HIGH: u8 = 0x1;
-const ALLOC_ZONE_FSEG: u8 = 0x2;
-
-const FW_CFG_FILENAME_TABLE_LOADER: &str = "etc/table-loader";
-const FW_CFG_FILENAME_RSDP: &str = "acpi/rsdp";
-const FW_CFG_FILENAME_ACPI_TABLES: &str = "acpi/tables";
-
-#[derive(Debug)]
-pub enum FwCfgContent {
-    Bytes(Vec<u8>),
-    Slice(&'static [u8]),
-    File(u64, File),
-    U32(u32),
-}
-
-struct FwCfgContentAccess<'a> {
-    content: &'a FwCfgContent,
-    offset: u32,
-}
-
-impl Read for FwCfgContentAccess<'_> {
-    fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
-        match self.content {
-            FwCfgContent::File(offset, f) => {
-                Seek::seek(&mut (&*f), SeekFrom::Start(offset + self.offset as u64))?;
-                Read::read(&mut (&*f), buf)
-            }
-            FwCfgContent::Bytes(b) => match b.get(self.offset as usize..) {
-                Some(mut s) => s.read(buf),
-                None => Err(ErrorKind::UnexpectedEof)?,
-            },
-            FwCfgContent::Slice(b) => match b.get(self.offset as usize..) {
-                Some(mut s) => s.read(buf),
-                None => Err(ErrorKind::UnexpectedEof)?,
-            },
-            FwCfgContent::U32(n) => match n.to_le_bytes().get(self.offset as usize..) {
-                Some(mut s) => s.read(buf),
-                None => Err(ErrorKind::UnexpectedEof)?,
-            },
-        }
-    }
-}
-
-impl Default for FwCfgContent {
-    fn default() -> Self {
-        FwCfgContent::Slice(&[])
-    }
-}
-
-impl FwCfgContent {
-    fn size(&self) -> Result<u32> {
-        let ret = match self {
-            FwCfgContent::Bytes(v) => v.len(),
-            FwCfgContent::File(offset, f) => (f.metadata()?.len() - offset) as usize,
-            FwCfgContent::Slice(s) => s.len(),
-            FwCfgContent::U32(n) => size_of_val(n),
-        };
-        u32::try_from(ret).map_err(|_| std::io::ErrorKind::InvalidInput.into())
-    }
-    fn access(&self, offset: u32) -> FwCfgContentAccess<'_> {
-        FwCfgContentAccess {
-            content: self,
-            offset,
-        }
-    }
-}
-
-#[derive(Debug, Default)]
-pub struct FwCfgItem {
-    pub name: String,
-    pub content: FwCfgContent,
-}
-
-/// https://www.qemu.org/docs/master/specs/fw_cfg.html
-#[derive(Debug)]
-pub struct FwCfg {
-    selector: u16,
-    data_offset: u32,
-    dma_address: u64,
-    items: Vec<FwCfgItem>,                           // 0x20 and above
-    known_items: [FwCfgContent; FW_CFG_KNOWN_ITEMS], // 0x0 to 0x19
-    memory: GuestMemoryAtomic<GuestMemoryMmap<AtomicBitmap>>,
-}
-
-#[repr(C)]
-#[derive(Debug, IntoBytes, FromBytes)]
-struct FwCfgDmaAccess {
-    control_be: u32,
-    length_be: u32,
-    address_be: u64,
-}
-
-// https://github.com/torvalds/linux/blob/master/include/uapi/linux/qemu_fw_cfg.h#L67
-#[bitfield(u32)]
-struct AccessControl {
-    // FW_CFG_DMA_CTL_ERROR = 0x01
-    error: bool,
-    // FW_CFG_DMA_CTL_READ = 0x02
-    read: bool,
-    #[bits(1)]
-    _unused2: u8,
-    // FW_CFG_DMA_CTL_SKIP = 0x04
-    skip: bool,
-    #[bits(3)]
-    _unused3: u8,
-    // FW_CFG_DMA_CTL_ERROR = 0x08
-    select: bool,
-    #[bits(7)]
-    _unused4: u8,
-    // FW_CFG_DMA_CTL_WRITE = 0x10
-    write: bool,
-    #[bits(16)]
-    _unused: u32,
-}
-
-#[repr(C)]
-#[derive(Debug, IntoBytes, FromBytes)]
-struct FwCfgFilesHeader {
-    count_be: u32,
-}
-
-pub const FILE_NAME_SIZE: usize = 56;
-
-pub fn create_file_name(name: &str) -> [u8; FILE_NAME_SIZE] {
-    let mut c_name = [0u8; FILE_NAME_SIZE];
-    let c_len = std::cmp::min(FILE_NAME_SIZE - 1, name.len());
-    c_name[0..c_len].copy_from_slice(&name.as_bytes()[0..c_len]);
-    c_name
-}
-
-#[allow(dead_code)]
-#[repr(C, packed)]
-#[derive(Debug, IntoBytes, FromBytes, Clone, Copy)]
-struct BootE820Entry {
-    addr: u64,
-    size: u64,
-    type_: u32,
-}
-
-#[repr(C)]
-#[derive(Debug, IntoBytes, FromBytes)]
-struct FwCfgFile {
-    size_be: u32,
-    select_be: u16,
-    _reserved: u16,
-    name: [u8; FILE_NAME_SIZE],
-}
-
-#[repr(C, align(4))]
-#[derive(Debug, IntoBytes, Immutable)]
-struct Allocate {
-    command: u32,
-    file: [u8; FILE_NAME_SIZE],
-    align: u32,
-    zone: u8,
-    _pad: [u8; 63],
-}
-
-#[repr(C, align(4))]
-#[derive(Debug, IntoBytes, Immutable)]
-struct AddPointer {
-    command: u32,
-    dst: [u8; FILE_NAME_SIZE],
-    src: [u8; FILE_NAME_SIZE],
-    offset: u32,
-    size: u8,
-    _pad: [u8; 7],
-}
-
-#[repr(C, align(4))]
-#[derive(Debug, IntoBytes, Immutable)]
-struct AddChecksum {
-    command: u32,
-    file: [u8; FILE_NAME_SIZE],
-    offset: u32,
-    start: u32,
-    len: u32,
-    _pad: [u8; 56],
-}
-
-fn create_intra_pointer(name: &str, offset: usize, size: u8) -> AddPointer {
-    AddPointer {
-        command: COMMAND_ADD_POINTER,
-        dst: create_file_name(name),
-        src: create_file_name(name),
-        offset: offset as u32,
-        size,
-        _pad: [0; 7],
-    }
-}
-
-fn create_acpi_table_checksum(offset: usize, len: usize) -> AddChecksum {
-    AddChecksum {
-        command: COMMAND_ADD_CHECKSUM,
-        file: create_file_name(FW_CFG_FILENAME_ACPI_TABLES),
-        offset: (offset + offset_of!(AcpiTableHeader, checksum)) as u32,
-        start: offset as u32,
-        len: len as u32,
-        _pad: [0; 56],
-    }
-}
-
-#[repr(C, align(4))]
-#[derive(Debug, Clone, Default, FromBytes, IntoBytes)]
-struct AcpiTableHeader {
-    signature: [u8; 4],
-    length: u32,
-    revision: u8,
-    checksum: u8,
-    oem_id: [u8; 6],
-    oem_table_id: [u8; 8],
-    oem_revision: u32,
-    asl_compiler_id: [u8; 4],
-    asl_compiler_revision: u32,
-}
-
-struct AcpiTable {
-    rsdp: Rsdp,
-    tables: Vec<u8>,
-    table_pointers: Vec<usize>,
-    table_checksums: Vec<(usize, usize)>,
-}
-
-impl AcpiTable {
-    fn pointers(&self) -> &[usize] {
-        &self.table_pointers
-    }
-
-    fn checksums(&self) -> &[(usize, usize)] {
-        &self.table_checksums
-    }
-
-    fn take(self) -> (Rsdp, Vec<u8>) {
-        (self.rsdp, self.tables)
-    }
-}
-
-// Creates fw_cfg items used by firmware to load and verify Acpi tables
-// https://github.com/qemu/qemu/blob/master/hw/acpi/bios-linker-loader.c
-fn create_acpi_loader(acpi_table: AcpiTable) -> [FwCfgItem; 3] {
-    let mut table_loader_bytes: Vec<u8> = Vec::new();
-    let allocate_rsdp = Allocate {
-        command: COMMAND_ALLOCATE,
-        file: create_file_name(FW_CFG_FILENAME_RSDP),
-        align: 4,
-        zone: ALLOC_ZONE_FSEG,
-        _pad: [0; 63],
-    };
-    table_loader_bytes.extend(allocate_rsdp.as_bytes());
-
-    let allocate_tables = Allocate {
-        command: COMMAND_ALLOCATE,
-        file: create_file_name(FW_CFG_FILENAME_ACPI_TABLES),
-        align: 4,
-        zone: ALLOC_ZONE_HIGH,
-        _pad: [0; 63],
-    };
-    table_loader_bytes.extend(allocate_tables.as_bytes());
-
-    for pointer_offset in acpi_table.pointers().iter() {
-        let pointer = create_intra_pointer(FW_CFG_FILENAME_ACPI_TABLES, *pointer_offset, 8);
-        table_loader_bytes.extend(pointer.as_bytes());
-    }
-    for (offset, len) in acpi_table.checksums().iter() {
-        let checksum = create_acpi_table_checksum(*offset, *len);
-        table_loader_bytes.extend(checksum.as_bytes());
-    }
-    let pointer_rsdp_to_xsdt = AddPointer {
-        command: COMMAND_ADD_POINTER,
-        dst: create_file_name(FW_CFG_FILENAME_RSDP),
-        src: create_file_name(FW_CFG_FILENAME_ACPI_TABLES),
-        offset: offset_of!(Rsdp, xsdt_addr) as u32,
-        size: 8,
-        _pad: [0; 7],
-    };
-    table_loader_bytes.extend(pointer_rsdp_to_xsdt.as_bytes());
-    let checksum_rsdp = AddChecksum {
-        command: COMMAND_ADD_CHECKSUM,
-        file: create_file_name(FW_CFG_FILENAME_RSDP),
-        offset: offset_of!(Rsdp, checksum) as u32,
-        start: 0,
-        len: offset_of!(Rsdp, length) as u32,
-        _pad: [0; 56],
-    };
-    let checksum_rsdp_ext = AddChecksum {
-        command: COMMAND_ADD_CHECKSUM,
-        file: create_file_name(FW_CFG_FILENAME_RSDP),
-        offset: offset_of!(Rsdp, extended_checksum) as u32,
-        start: 0,
-        len: size_of::<Rsdp>() as u32,
-        _pad: [0; 56],
-    };
-    table_loader_bytes.extend(checksum_rsdp.as_bytes());
-    table_loader_bytes.extend(checksum_rsdp_ext.as_bytes());
-
-    let table_loader = FwCfgItem {
-        name: FW_CFG_FILENAME_TABLE_LOADER.to_owned(),
-        content: FwCfgContent::Bytes(table_loader_bytes),
-    };
-    let (rsdp, tables) = acpi_table.take();
-    let acpi_rsdp = FwCfgItem {
-        name: FW_CFG_FILENAME_RSDP.to_owned(),
-        content: FwCfgContent::Bytes(rsdp.as_bytes().to_owned()),
-    };
-    let apci_tables = FwCfgItem {
-        name: FW_CFG_FILENAME_ACPI_TABLES.to_owned(),
-        content: FwCfgContent::Bytes(tables),
-    };
-    [table_loader, acpi_rsdp, apci_tables]
-}
-
-impl FwCfg {
-    pub fn new(memory: GuestMemoryAtomic<GuestMemoryMmap<AtomicBitmap>>) -> FwCfg {
-        const DEFAULT_ITEM: FwCfgContent = FwCfgContent::Slice(&[]);
-        let mut known_items = [DEFAULT_ITEM; FW_CFG_KNOWN_ITEMS];
-        known_items[FW_CFG_SIGNATURE as usize] = FwCfgContent::Slice(&FW_CFG_DMA_SIGNATURE);
-        known_items[FW_CFG_ID as usize] = FwCfgContent::Slice(&FW_CFG_FEATURE);
-        let file_buf = Vec::from(FwCfgFilesHeader { count_be: 0 }.as_mut_bytes());
-        known_items[FW_CFG_FILE_DIR as usize] = FwCfgContent::Bytes(file_buf);
-
-        FwCfg {
-            selector: 0,
-            data_offset: 0,
-            dma_address: 0,
-            items: vec![],
-            known_items,
-            memory,
-        }
-    }
-
-    pub fn populate_fw_cfg(
-        &mut self,
-        mem_size: Option<usize>,
-        kernel: Option<File>,
-        initramfs: Option<File>,
-        cmdline: Option<std::ffi::CString>,
-        fw_cfg_item_list: Option<Vec<FwCfgItem>>,
-    ) -> Result<()> {
-        if let Some(mem_size) = mem_size {
-            self.add_e820(mem_size)?
-        }
-        if let Some(kernel) = kernel {
-            self.add_kernel_data(&kernel)?;
-        }
-        if let Some(cmdline) = cmdline {
-            self.add_kernel_cmdline(cmdline);
-        }
-        if let Some(initramfs) = initramfs {
-            self.add_initramfs_data(&initramfs)?
-        }
-        if let Some(fw_cfg_item_list) = fw_cfg_item_list {
-            for item in fw_cfg_item_list {
-                self.add_item(item)?;
-            }
-        }
-        Ok(())
-    }
-
-    pub fn add_e820(&mut self, mem_size: usize) -> Result<()> {
-        #[cfg(target_arch = "x86_64")]
-        let mut mem_regions = vec![
-            (GuestAddress(0), EBDA_START.0 as usize, RegionType::Ram),
-            (
-                MEM_32BIT_DEVICES_START,
-                MEM_32BIT_DEVICES_SIZE as usize,
-                RegionType::Reserved,
-            ),
-            (
-                PCI_MMCONFIG_START,
-                PCI_MMCONFIG_SIZE as usize,
-                RegionType::Reserved,
-            ),
-            (STAGE0_START_ADDRESS, STAGE0_SIZE, RegionType::Reserved),
-        ];
-        #[cfg(target_arch = "aarch64")]
-        let mut mem_regions = arch::aarch64::arch_memory_regions();
-        if mem_size < MEM_32BIT_DEVICES_START.0 as usize {
-            mem_regions.push((
-                HIGH_RAM_START,
-                mem_size - HIGH_RAM_START.0 as usize,
-                RegionType::Ram,
-            ));
-        } else {
-            mem_regions.push((
-                HIGH_RAM_START,
-                MEM_32BIT_RESERVED_START.0 as usize - HIGH_RAM_START.0 as usize,
-                RegionType::Ram,
-            ));
-            mem_regions.push((
-                RAM_64BIT_START,
-                mem_size - (MEM_32BIT_DEVICES_START.0 as usize),
-                RegionType::Ram,
-            ));
-        }
-        let mut bytes = vec![];
-        for (addr, size, region) in mem_regions.iter() {
-            let type_ = match region {
-                RegionType::Ram => E820_RAM,
-                RegionType::Reserved => E820_RESERVED,
-                RegionType::SubRegion => continue,
-            };
-            let mut entry = BootE820Entry {
-                addr: addr.0,
-                size: *size as u64,
-                type_,
-            };
-            bytes.extend_from_slice(entry.as_mut_bytes());
-        }
-        let item = FwCfgItem {
-            name: "etc/e820".to_owned(),
-            content: FwCfgContent::Bytes(bytes),
-        };
-        self.add_item(item)
-    }
-
-    fn file_dir_mut(&mut self) -> &mut Vec<u8> {
-        let FwCfgContent::Bytes(file_buf) = &mut self.known_items[FW_CFG_FILE_DIR as usize] else {
-            unreachable!("fw_cfg: selector {FW_CFG_FILE_DIR:#x} should be FwCfgContent::Byte!")
-        };
-        file_buf
-    }
-
-    fn update_count(&mut self) {
-        let mut header = FwCfgFilesHeader {
-            count_be: (self.items.len() as u32).to_be(),
-        };
-        self.file_dir_mut()[0..4].copy_from_slice(header.as_mut_bytes());
-    }
-
-    pub fn add_item(&mut self, item: FwCfgItem) -> Result<()> {
-        let index = self.items.len();
-        let c_name = create_file_name(&item.name);
-        let size = item.content.size()?;
-        let mut cfg_file = FwCfgFile {
-            size_be: size.to_be(),
-            select_be: (FW_CFG_FILE_FIRST + index as u16).to_be(),
-            _reserved: 0,
-            name: c_name,
-        };
-        self.file_dir_mut()
-            .extend_from_slice(cfg_file.as_mut_bytes());
-        self.items.push(item);
-        self.update_count();
-        Ok(())
-    }
-
-    fn dma_read_content(
-        &self,
-        content: &FwCfgContent,
-        offset: u32,
-        len: u32,
-        address: u64,
-    ) -> Result<u32> {
-        let content_size = content.size()?.saturating_sub(offset);
-        let op_size = std::cmp::min(content_size, len);
-        let mut access = content.access(offset);
-        let mut buf = vec![0u8; op_size as usize];
-        access.read_exact(buf.as_mut_bytes())?;
-        let r = self
-            .memory
-            .memory()
-            .write(buf.as_bytes(), GuestAddress(address));
-        match r {
-            Err(e) => {
-                error!("fw_cfg: dma read error: {e:x?}");
-                Err(ErrorKind::InvalidInput.into())
-            }
-            Ok(size) => Ok(size as u32),
-        }
-    }
-
-    fn dma_read(&mut self, selector: u16, len: u32, address: u64) -> Result<()> {
-        let op_size = if let Some(content) = self.known_items.get(selector as usize) {
-            self.dma_read_content(content, self.data_offset, len, address)
-        } else if let Some(item) = self.items.get((selector - FW_CFG_FILE_FIRST) as usize) {
-            self.dma_read_content(&item.content, self.data_offset, len, address)
-        } else {
-            error!("fw_cfg: selector {selector:#x} does not exist.");
-            Err(ErrorKind::NotFound.into())
-        }?;
-        self.data_offset += op_size;
-        Ok(())
-    }
-
-    fn do_dma(&mut self) {
-        let dma_address = self.dma_address;
-        let mut access = FwCfgDmaAccess::new_zeroed();
-        let dma_access = match self
-            .memory
-            .memory()
-            .read(access.as_mut_bytes(), GuestAddress(dma_address))
-        {
-            Ok(_) => access,
-            Err(e) => {
-                error!("fw_cfg: invalid address of dma access {dma_address:#x}: {e:?}");
-                return;
-            }
-        };
-        let control = AccessControl(u32::from_be(dma_access.control_be));
-        if control.select() {
-            self.selector = control.select() as u16;
-        }
-        let len = u32::from_be(dma_access.length_be);
-        let addr = u64::from_be(dma_access.address_be);
-        let ret = if control.read() {
-            self.dma_read(self.selector, len, addr)
-        } else if control.write() {
-            Err(ErrorKind::InvalidInput.into())
-        } else if control.skip() {
-            self.data_offset += len;
-            Ok(())
-        } else {
-            Err(ErrorKind::InvalidData.into())
-        };
-        let mut access_resp = AccessControl(0);
-        if let Err(e) = ret {
-            error!("fw_cfg: dma operation {dma_access:x?}: {e:x?}");
-            access_resp.set_error(true);
-        }
-        if let Err(e) = self.memory.memory().write(
-            &access_resp.0.to_be_bytes(),
-            GuestAddress(dma_address + core::mem::offset_of!(FwCfgDmaAccess, control_be) as u64),
-        ) {
-            error!("fw_cfg: finishing dma: {e:?}")
-        }
-    }
-
-    pub fn add_kernel_data(&mut self, file: &File) -> Result<()> {
-        let mut buffer = vec![0u8; size_of::<boot_params>()];
-        file.read_exact_at(&mut buffer, 0)?;
-        let bp = boot_params::from_mut_slice(&mut buffer).unwrap();
-        #[cfg(target_arch = "x86_64")]
-        {
-            // must set to 4 for backwards compatibility
-            // https://docs.kernel.org/arch/x86/boot.html#the-real-mode-kernel-header
-            if bp.hdr.setup_sects == 0 {
-                bp.hdr.setup_sects = 4;
-            }
-            // wildcard boot loader type
-            bp.hdr.type_of_loader = 0xff;
-        }
-        #[cfg(target_arch = "aarch64")]
-        let kernel_start = bp.text_offset;
-        #[cfg(target_arch = "x86_64")]
-        let kernel_start = (bp.hdr.setup_sects as usize + 1) * 512;
-        self.known_items[FW_CFG_SETUP_SIZE as usize] = FwCfgContent::U32(buffer.len() as u32);
-        self.known_items[FW_CFG_SETUP_DATA as usize] = FwCfgContent::Bytes(buffer);
-        self.known_items[FW_CFG_KERNEL_SIZE as usize] =
-            FwCfgContent::U32(file.metadata()?.len() as u32 - kernel_start as u32);
-        self.known_items[FW_CFG_KERNEL_DATA as usize] =
-            FwCfgContent::File(kernel_start as u64, file.try_clone()?);
-        Ok(())
-    }
-
-    pub fn add_kernel_cmdline(&mut self, s: std::ffi::CString) {
-        let bytes = s.into_bytes_with_nul();
-        self.known_items[FW_CFG_CMDLINE_SIZE as usize] = FwCfgContent::U32(bytes.len() as u32);
-        self.known_items[FW_CFG_CMDLINE_DATA as usize] = FwCfgContent::Bytes(bytes);
-    }
-
-    pub fn add_acpi(
-        &mut self,
-        rsdp: Rsdp,
-        tables: Vec<u8>,
-        table_checksums: Vec<(usize, usize)>,
-        table_pointers: Vec<usize>,
-    ) -> Result<()> {
-        let acpi_table = AcpiTable {
-            rsdp,
-            tables,
-            table_checksums,
-            table_pointers,
-        };
-        let [table_loader, acpi_rsdp, apci_tables] = create_acpi_loader(acpi_table);
-        self.add_item(table_loader)?;
-        self.add_item(acpi_rsdp)?;
-        self.add_item(apci_tables)
-    }
-
-    pub fn add_initramfs_data(&mut self, file: &File) -> Result<()> {
-        let initramfs_size = file.metadata()?.len();
-        self.known_items[FW_CFG_INITRD_SIZE as usize] = FwCfgContent::U32(initramfs_size as _);
-        self.known_items[FW_CFG_INITRD_DATA as usize] = FwCfgContent::File(0, file.try_clone()?);
-        Ok(())
-    }
-
-    fn read_content(content: &FwCfgContent, offset: u32, data: &mut [u8], size: u32) -> Option<u8> {
-        let start = offset as usize;
-        let end = start + size as usize;
-        match content {
-            FwCfgContent::Bytes(b) => {
-                if b.len() >= size as usize {
-                    data.copy_from_slice(&b[start..end]);
-                }
-            }
-            FwCfgContent::Slice(s) => {
-                if s.len() >= size as usize {
-                    data.copy_from_slice(&s[start..end]);
-                }
-            }
-            FwCfgContent::File(o, f) => {
-                f.read_exact_at(data, o + offset as u64).ok()?;
-            }
-            FwCfgContent::U32(n) => {
-                let bytes = n.to_le_bytes();
-                data.copy_from_slice(&bytes[start..end]);
-            }
-        };
-        Some(size as u8)
-    }
-
-    fn read_data(&mut self, data: &mut [u8], size: u32) -> u8 {
-        let ret = if let Some(content) = self.known_items.get(self.selector as usize) {
-            Self::read_content(content, self.data_offset, data, size)
-        } else if let Some(item) = self.items.get((self.selector - FW_CFG_FILE_FIRST) as usize) {
-            Self::read_content(&item.content, self.data_offset, data, size)
-        } else {
-            error!("fw_cfg: selector {:#x} does not exist.", self.selector);
-            None
-        };
-        if let Some(val) = ret {
-            self.data_offset += size;
-            val
-        } else {
-            0
-        }
-    }
-}
-
-impl BusDevice for FwCfg {
-    fn read(&mut self, _base: u64, offset: u64, data: &mut [u8]) {
-        let port = offset + PORT_FW_CFG_BASE;
-        let size = data.len();
-        match (port, size) {
-            (PORT_FW_CFG_SELECTOR, _) => {
-                error!("fw_cfg: selector register is write-only.");
-            }
-            (PORT_FW_CFG_DATA, _) => _ = self.read_data(data, size as u32),
-            (PORT_FW_CFG_DMA_HI, 4) => {
-                let addr = self.dma_address;
-                let addr_hi = (addr >> 32) as u32;
-                data.copy_from_slice(&addr_hi.to_be_bytes());
-            }
-            (PORT_FW_CFG_DMA_LO, 4) => {
-                let addr = self.dma_address;
-                let addr_lo = (addr & 0xffff_ffff) as u32;
-                data.copy_from_slice(&addr_lo.to_be_bytes());
-            }
-            _ => {
-                debug!(
-                    "fw_cfg: read from unknown port {port:#x}: {size:#x} bytes and offset {offset:#x}."
-                );
-            }
-        };
-    }
-
-    fn write(&mut self, _base: u64, offset: u64, data: &[u8]) -> Option<Arc<Barrier>> {
-        let port = offset + PORT_FW_CFG_BASE;
-        let size = data.size();
-        match (port, size) {
-            (PORT_FW_CFG_SELECTOR, 2) => {
-                let mut buf = [0u8; 2];
-                buf[..size].copy_from_slice(&data[..size]);
-                #[cfg(target_arch = "x86_64")]
-                let val = u16::from_le_bytes(buf);
-                #[cfg(target_arch = "aarch64")]
-                let val = u16::from_be_bytes(buf);
-                self.selector = val;
-                self.data_offset = 0;
-            }
-            (PORT_FW_CFG_DATA, 1) => error!("fw_cfg: data register is read-only."),
-            (PORT_FW_CFG_DMA_HI, 4) => {
-                let mut buf = [0u8; 4];
-                buf[..size].copy_from_slice(&data[..size]);
-                let val = u32::from_be_bytes(buf);
-                self.dma_address &= 0xffff_ffff;
-                self.dma_address |= (val as u64) << 32;
-            }
-            (PORT_FW_CFG_DMA_LO, 4) => {
-                let mut buf = [0u8; 4];
-                buf[..size].copy_from_slice(&data[..size]);
-                let val = u32::from_be_bytes(buf);
-                self.dma_address &= !0xffff_ffff;
-                self.dma_address |= val as u64;
-                self.do_dma();
-            }
-            _ => debug!(
-                "fw_cfg: write to unknown port {port:#x}: {size:#x} bytes and offset {offset:#x} ."
-            ),
-        };
-        None
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use std::ffi::CString;
-    use std::io::Write;
-
-    use vmm_sys_util::tempfile::TempFile;
-
-    use super::*;
-
-    #[cfg(target_arch = "x86_64")]
-    const SELECTOR_OFFSET: u64 = 0;
-    #[cfg(target_arch = "aarch64")]
-    const SELECTOR_OFFSET: u64 = 8;
-    #[cfg(target_arch = "x86_64")]
-    const DATA_OFFSET: u64 = 1;
-    #[cfg(target_arch = "aarch64")]
-    const DATA_OFFSET: u64 = 0;
-    #[cfg(target_arch = "x86_64")]
-    const DMA_OFFSET: u64 = 4;
-    #[cfg(target_arch = "aarch64")]
-    const DMA_OFFSET: u64 = 16;
-
-    #[test]
-    fn test_signature() {
-        let gm = GuestMemoryAtomic::new(
-            GuestMemoryMmap::from_ranges(&[(GuestAddress(0), RAM_64BIT_START.0 as usize)]).unwrap(),
-        );
-
-        let mut fw_cfg = FwCfg::new(gm);
-
-        let mut data = vec![0u8];
-
-        let mut sig_iter = FW_CFG_DMA_SIGNATURE.into_iter();
-        fw_cfg.write(0, SELECTOR_OFFSET, &[FW_CFG_SIGNATURE as u8, 0]);
-        loop {
-            if let Some(char) = sig_iter.next() {
-                fw_cfg.read(0, DATA_OFFSET, &mut data);
-                assert_eq!(data[0], char);
-            } else {
-                return;
-            }
-        }
-    }
-    #[test]
-    fn test_kernel_cmdline() {
-        let gm = GuestMemoryAtomic::new(
-            GuestMemoryMmap::from_ranges(&[(GuestAddress(0), RAM_64BIT_START.0 as usize)]).unwrap(),
-        );
-
-        let mut fw_cfg = FwCfg::new(gm);
-
-        let cmdline = *b"cmdline\0";
-
-        fw_cfg.add_kernel_cmdline(CString::from_vec_with_nul(cmdline.to_vec()).unwrap());
-
-        let mut data = vec![0u8];
-
-        let mut cmdline_iter = cmdline.into_iter();
-        fw_cfg.write(0, SELECTOR_OFFSET, &[FW_CFG_CMDLINE_DATA as u8, 0]);
-        loop {
-            if let Some(char) = cmdline_iter.next() {
-                fw_cfg.read(0, DATA_OFFSET, &mut data);
-                assert_eq!(data[0], char);
-            } else {
-                return;
-            }
-        }
-    }
-
-    #[test]
-    fn test_initram_fs() {
-        let gm = GuestMemoryAtomic::new(
-            GuestMemoryMmap::from_ranges(&[(GuestAddress(0), RAM_64BIT_START.0 as usize)]).unwrap(),
-        );
-
-        let mut fw_cfg = FwCfg::new(gm);
-
-        let temp = TempFile::new().unwrap();
-        let mut temp_file = temp.as_file();
-
-        let initram_content = b"this is the initramfs";
-        let written = temp_file.write(initram_content);
-        assert_eq!(written.unwrap(), 21);
-        let _ = fw_cfg.add_initramfs_data(temp_file);
-
-        let mut data = vec![0u8];
-
-        let mut initram_iter = (*initram_content).into_iter();
-        fw_cfg.write(0, SELECTOR_OFFSET, &[FW_CFG_INITRD_DATA as u8, 0]);
-        loop {
-            if let Some(char) = initram_iter.next() {
-                fw_cfg.read(0, DATA_OFFSET, &mut data);
-                assert_eq!(data[0], char);
-            } else {
-                return;
-            }
-        }
-    }
-
-    #[test]
-    fn test_dma() {
-        let code = [
-            0xba, 0xf8, 0x03, 0x00, 0xd8, 0x04, b'0', 0xee, 0xb0, b'\n', 0xee, 0xf4,
-        ];
-
-        let content = FwCfgContent::Bytes(code.to_vec());
-
-        let mem_size = 0x1000;
-        let load_addr = GuestAddress(0x1000);
-        let mem: GuestMemoryMmap<AtomicBitmap> =
-            GuestMemoryMmap::from_ranges(&[(load_addr, mem_size)]).unwrap();
-
-        // Note: In firmware we would just allocate FwCfgDmaAccess struct
-        // and use address of struct (&) as dma address
-        let mut access_control = AccessControl(0);
-        // bit 1 = read access
-        access_control.set_read(true);
-        // length of data to access
-        let length_be = (code.len() as u32).to_be();
-        // guest address for data
-        let code_address = 0x1900_u64;
-        let address_be = code_address.to_be();
-        let mut access = FwCfgDmaAccess {
-            control_be: access_control.0.to_be(), // bit(1) = read bit
-            length_be,
-            address_be,
-        };
-        // access address is where to put the code
-        let access_address = GuestAddress(load_addr.0);
-        let address_bytes = access_address.0.to_be_bytes();
-        let dma_lo: [u8; 4] = address_bytes[0..4].try_into().unwrap();
-        let dma_hi: [u8; 4] = address_bytes[4..8].try_into().unwrap();
-
-        // writing the FwCfgDmaAccess to mem (this would just be self.dma_access.as_ref() in guest)
-        let _ = mem.write(access.as_mut_bytes(), access_address);
-        let mem_m = GuestMemoryAtomic::new(mem.clone());
-        let mut fw_cfg = FwCfg::new(mem_m);
-        let cfg_item = FwCfgItem {
-            name: "code".to_string(),
-            content,
-        };
-        let _ = fw_cfg.add_item(cfg_item);
-
-        let mut data = [0u8; 12];
-
-        let _ = mem.read(&mut data, GuestAddress(code_address));
-        assert_ne!(data, code);
-
-        fw_cfg.write(0, SELECTOR_OFFSET, &[FW_CFG_FILE_FIRST as u8, 0]);
-        fw_cfg.write(0, DMA_OFFSET, &dma_lo);
-        fw_cfg.write(0, DMA_OFFSET + 4, &dma_hi);
-        let _ = mem.read(&mut data, GuestAddress(code_address));
-        assert_eq!(data, code);
-    }
-}

devices/src/legacy/fwdebug.rs

@@ -8,7 +8,6 @@
 //
 
 use std::sync::{Arc, Barrier};
-
 use vm_device::BusDevice;
 
 /// Provides firmware debug output via I/O port controls

devices/src/legacy/gpio_pl061.rs

@@ -7,16 +7,17 @@
 //! This module implements an ARM PrimeCell General Purpose Input/Output(PL061) to support gracefully poweroff microvm from external.
 //!
 
-use std::sync::{Arc, Barrier};
-use std::{io, result};
-
-use serde::{Deserialize, Serialize};
-use thiserror::Error;
-use vm_device::BusDevice;
-use vm_device::interrupt::InterruptSourceGroup;
-use vm_migration::{Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
-
 use crate::{read_le_u32, write_le_u32};
+use std::result;
+use std::sync::{Arc, Barrier};
+use std::{fmt, io};
+use versionize::{VersionMap, Versionize, VersionizeResult};
+use versionize_derive::Versionize;
+use vm_device::interrupt::InterruptSourceGroup;
+use vm_device::BusDevice;
+use vm_migration::{
+    Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable, VersionMapped,
+};
 
 const OFS_DATA: u64 = 0x400; // Data Register
 const GPIODIR: u64 = 0x400; // Direction Register
@@ -28,10 +29,10 @@ const GPIORIE: u64 = 0x414; // Raw Interrupt Status Register
 const GPIOMIS: u64 = 0x418; // Masked Interrupt Status Register
 const GPIOIC: u64 = 0x41c; // Interrupt Clear Register
 const GPIOAFSEL: u64 = 0x420; // Mode Control Select Register
-// From 0x424 to 0xFDC => reserved space.
-// From 0xFE0 to 0xFFC => Peripheral and PrimeCell Identification Registers which are Read Only registers.
-// These registers can conceptually be treated as a 32-bit register, and PartNumber[11:0] is used to identify the peripheral.
-// We are putting the expected values (look at 'Reset value' column from above mentioned document) in an array.
+                              // From 0x424 to 0xFDC => reserved space.
+                              // From 0xFE0 to 0xFFC => Peripheral and PrimeCell Identification Registers which are Read Only registers.
+                              // These registers can conceptually be treated as a 32-bit register, and PartNumber[11:0] is used to identify the peripheral.
+                              // We are putting the expected values (look at 'Reset value' column from above mentioned document) in an array.
 const GPIO_ID: [u8; 8] = [0x61, 0x10, 0x14, 0x00, 0x0d, 0xf0, 0x05, 0xb1];
 // ID Margins
 const GPIO_ID_LOW: u64 = 0xfe0;
@@ -39,18 +40,29 @@ const GPIO_ID_HIGH: u64 = 0x1000;
 
 const N_GPIOS: u32 = 8;
 
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
-    #[error("Bad Write Offset: {0}")]
     BadWriteOffset(u64),
-    #[error("GPIO interrupt disabled by guest driver")]
     GpioInterruptDisabled,
-    #[error("Could not trigger GPIO interrupt")]
-    GpioInterruptFailure(#[source] io::Error),
-    #[error("Invalid GPIO Input key triggered: {0}")]
+    GpioInterruptFailure(io::Error),
     GpioTriggerKeyFailure(u32),
 }
 
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Error::BadWriteOffset(offset) => write!(f, "Bad Write Offset: {offset}"),
+            Error::GpioInterruptDisabled => write!(f, "GPIO interrupt disabled by guest driver.",),
+            Error::GpioInterruptFailure(ref e) => {
+                write!(f, "Could not trigger GPIO interrupt: {e}.")
+            }
+            Error::GpioTriggerKeyFailure(key) => {
+                write!(f, "Invalid GPIO Input key triggered: {key}.")
+            }
+        }
+    }
+}
+
 type Result<T> = result::Result<T, Error>;
 
 /// A GPIO device following the PL061 specification.
@@ -77,7 +89,7 @@ pub struct Gpio {
     interrupt: Arc<dyn InterruptSourceGroup>,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Versionize)]
 pub struct GpioState {
     data: u32,
     old_in_data: u32,
@@ -90,6 +102,8 @@ pub struct GpioState {
     afsel: u32,
 }
 
+impl VersionMapped for GpioState {}
+
 impl Gpio {
     /// Constructs an PL061 GPIO device.
     pub fn new(
@@ -314,7 +328,7 @@ impl Snapshottable for Gpio {
     }
 
     fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
-        Snapshot::new_from_state(&self.state())
+        Snapshot::new_from_versioned_state(&self.state())
     }
 }
 
@@ -324,11 +338,12 @@ impl Migratable for Gpio {}
 
 #[cfg(test)]
 mod tests {
+    use super::*;
+    use crate::{read_le_u32, write_le_u32};
+    use std::sync::Arc;
     use vm_device::interrupt::{InterruptIndex, InterruptSourceConfig};
     use vmm_sys_util::eventfd::EventFd;
 
-    use super::*;
-
     const GPIO_NAME: &str = "gpio";
     const LEGACY_GPIO_MAPPED_IO_START: u64 = 0x0902_0000;
 

devices/src/legacy/i8042.rs

@@ -1,13 +1,12 @@
 // Copyright 2017 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
-//
-// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::{Arc, Barrier};
+use std::sync::{
+    atomic::{AtomicBool, Ordering},
+    Arc, Barrier,
+};
 use std::thread;
-
 use vm_device::BusDevice;
 use vmm_sys_util::eventfd::EventFd;
 

devices/src/legacy/mod.rs

@@ -8,8 +8,6 @@
 mod cmos;
 #[cfg(target_arch = "x86_64")]
 mod debug_port;
-#[cfg(feature = "fw_cfg")]
-pub mod fw_cfg;
 #[cfg(target_arch = "x86_64")]
 mod fwdebug;
 #[cfg(target_arch = "aarch64")]
@@ -24,17 +22,16 @@ mod uart_pl011;
 pub use self::cmos::Cmos;
 #[cfg(target_arch = "x86_64")]
 pub use self::debug_port::DebugPort;
-#[cfg(feature = "fw_cfg")]
-pub use self::fw_cfg::FwCfg;
 #[cfg(target_arch = "x86_64")]
 pub use self::fwdebug::FwDebugDevice;
+pub use self::i8042::I8042Device;
+pub use self::serial::Serial;
+
 #[cfg(target_arch = "aarch64")]
 pub use self::gpio_pl061::Error as GpioDeviceError;
 #[cfg(target_arch = "aarch64")]
 pub use self::gpio_pl061::Gpio;
-pub use self::i8042::I8042Device;
 #[cfg(target_arch = "aarch64")]
 pub use self::rtc_pl031::Rtc;
-pub use self::serial::Serial;
 #[cfg(target_arch = "aarch64")]
 pub use self::uart_pl011::Pl011;

devices/src/legacy/rtc_pl031.rs

@@ -4,22 +4,18 @@
 
 //! ARM PL031 Real Time Clock
 //!
-//! This module implements part of a PL031 Real Time Clock (RTC):
-//! * provide a clock value via RTCDR
-//! * no alarm is implemented through the match register
-//! * no interrupt is generated
-//! * RTC cannot be disabled via RTCCR
-//! * no test registers
+//! This module implements a PL031 Real Time Clock (RTC) that provides to provides long time base counter.
+//! This is achieved by generating an interrupt signal after counting for a programmed number of cycles of
+//! a real-time clock input.
 //!
-use std::result;
+use crate::{read_le_u32, write_le_u32};
+use std::fmt;
 use std::sync::{Arc, Barrier};
 use std::time::Instant;
-
-use thiserror::Error;
+use std::{io, result};
+use vm_device::interrupt::InterruptSourceGroup;
 use vm_device::BusDevice;
 
-use crate::{read_le_u32, write_le_u32};
-
 // As you can see in https://static.docs.arm.com/ddi0224/c/real_time_clock_pl031_r1p3_technical_reference_manual_DDI0224C.pdf
 // at section 3.2 Summary of RTC registers, the total size occupied by this device is 0x000 -> 0xFFC + 4 = 0x1000.
 // From 0x0 to 0x1C we have following registers:
@@ -31,11 +27,11 @@ const RTCIMSC: u64 = 0x10; // Interrupt Mask Set or Clear Register.
 const RTCRIS: u64 = 0x14; // Raw Interrupt Status.
 const RTCMIS: u64 = 0x18; // Masked Interrupt Status.
 const RTCICR: u64 = 0x1c; // Interrupt Clear Register.
-// From 0x020 to 0xFDC => reserved space.
-// From 0xFE0 to 0x1000 => Peripheral and PrimeCell Identification Registers which are Read Only registers.
-// AMBA standard devices have CIDs (Cell IDs) and PIDs (Peripheral IDs). The linux kernel will look for these in order to assert the identity
-// of these devices (i.e look at the `amba_device_try_add` function).
-// We are putting the expected values (look at 'Reset value' column from above mentioned document) in an array.
+                          // From 0x020 to 0xFDC => reserved space.
+                          // From 0xFE0 to 0x1000 => Peripheral and PrimeCell Identification Registers which are Read Only registers.
+                          // AMBA standard devices have CIDs (Cell IDs) and PIDs (Peripheral IDs). The linux kernel will look for these in order to assert the identity
+                          // of these devices (i.e look at the `amba_device_try_add` function).
+                          // We are putting the expected values (look at 'Reset value' column from above mentioned document) in an array.
 const PL031_ID: [u8; 8] = [0x31, 0x10, 0x14, 0x00, 0x0d, 0xf0, 0x05, 0xb1];
 // We are only interested in the margins.
 const AMBA_ID_LOW: u64 = 0xFE0;
@@ -43,10 +39,19 @@ const AMBA_ID_HIGH: u64 = 0x1000;
 /// Constant to convert seconds to nanoseconds.
 pub const NANOS_PER_SECOND: u64 = 1_000_000_000;
 
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
-    #[error("Bad Write Offset: {0}")]
     BadWriteOffset(u64),
+    InterruptFailure(io::Error),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Error::BadWriteOffset(offset) => write!(f, "Bad Write Offset: {offset}"),
+            Error::InterruptFailure(e) => write!(f, "Failed to trigger interrupt: {e}"),
+        }
+    }
 }
 
 type Result<T> = result::Result<T, Error>;
@@ -74,6 +79,98 @@ impl From<ClockType> for libc::clockid_t {
     }
 }
 
+/// Structure representing the date in local time with nanosecond precision.
+pub struct LocalTime {
+    /// Seconds in current minute.
+    sec: i32,
+    /// Minutes in current hour.
+    min: i32,
+    /// Hours in current day, 24H format.
+    hour: i32,
+    /// Days in current month.
+    mday: i32,
+    /// Months in current year.
+    mon: i32,
+    /// Years passed since 1900 BC.
+    year: i32,
+    /// Nanoseconds in current second.
+    nsec: i64,
+}
+
+impl LocalTime {
+    /// Returns the [LocalTime](struct.LocalTime.html) structure for the calling moment.
+    #[cfg(test)]
+    pub fn now() -> LocalTime {
+        let mut timespec = libc::timespec {
+            tv_sec: 0,
+            tv_nsec: 0,
+        };
+        let mut tm: libc::tm = libc::tm {
+            tm_sec: 0,
+            tm_min: 0,
+            tm_hour: 0,
+            tm_mday: 0,
+            tm_mon: 0,
+            tm_year: 0,
+            tm_wday: 0,
+            tm_yday: 0,
+            tm_isdst: 0,
+            tm_gmtoff: 0,
+            tm_zone: std::ptr::null(),
+        };
+
+        // SAFETY: the parameters are valid.
+        unsafe {
+            libc::clock_gettime(libc::CLOCK_REALTIME, &mut timespec);
+            libc::localtime_r(&timespec.tv_sec, &mut tm);
+        }
+
+        LocalTime {
+            sec: tm.tm_sec,
+            min: tm.tm_min,
+            hour: tm.tm_hour,
+            mday: tm.tm_mday,
+            mon: tm.tm_mon,
+            year: tm.tm_year,
+            nsec: timespec.tv_nsec,
+        }
+    }
+}
+
+impl fmt::Display for LocalTime {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "{}-{:02}-{:02}T{:02}:{:02}:{:02}.{:09}",
+            self.year + 1900,
+            self.mon + 1,
+            self.mday,
+            self.hour,
+            self.min,
+            self.sec,
+            self.nsec
+        )
+    }
+}
+
+/// Holds a micro-second resolution timestamp with both the real time and cpu time.
+#[derive(Clone)]
+pub struct TimestampUs {
+    /// Real time in microseconds.
+    pub time_us: u64,
+    /// Cpu time in microseconds.
+    pub cputime_us: u64,
+}
+
+impl Default for TimestampUs {
+    fn default() -> TimestampUs {
+        TimestampUs {
+            time_us: get_time(ClockType::Monotonic) / 1000,
+            cputime_us: get_time(ClockType::ProcessCpu) / 1000,
+        }
+    }
+}
+
 /// Returns a timestamp in nanoseconds based on the provided clock type.
 ///
 /// # Arguments
@@ -107,20 +204,31 @@ pub struct Rtc {
     match_value: u32,
     // Writes to this register load an update value into the RTC.
     load: u32,
+    imsc: u32,
+    ris: u32,
+    interrupt: Arc<dyn InterruptSourceGroup>,
 }
 
 impl Rtc {
     /// Constructs an AMBA PL031 RTC device.
-    pub fn new() -> Self {
+    pub fn new(interrupt: Arc<dyn InterruptSourceGroup>) -> Self {
         Self {
             // This is used only for duration measuring purposes.
             previous_now: Instant::now(),
             tick_offset: get_time(ClockType::Real) as i64,
             match_value: 0,
             load: 0,
+            imsc: 0,
+            ris: 0,
+            interrupt,
         }
     }
 
+    fn trigger_interrupt(&mut self) -> Result<()> {
+        self.interrupt.trigger(0).map_err(Error::InterruptFailure)?;
+        Ok(())
+    }
+
     fn get_time(&self) -> u32 {
         let ts = (self.tick_offset as i128)
             + (Instant::now().duration_since(self.previous_now).as_nanos() as i128);
@@ -144,8 +252,16 @@ impl Rtc {
                 // we want to terminate the execution of the process.
                 self.tick_offset = seconds_to_nanoseconds(i64::from(val)).unwrap();
             }
-            RTCIMSC => (),
-            RTCICR => (),
+            RTCIMSC => {
+                self.imsc = val & 1;
+                self.trigger_interrupt()?;
+            }
+            RTCICR => {
+                // As per above mentioned doc, the interrupt is cleared by writing any data value to
+                // the Interrupt Clear Register.
+                self.ris = 0;
+                self.trigger_interrupt()?;
+            }
             RTCCR => (), // ignore attempts to turn off the timer.
             o => {
                 return Err(Error::BadWriteOffset(o));
@@ -155,12 +271,6 @@ impl Rtc {
     }
 }
 
-impl Default for Rtc {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
 impl BusDevice for Rtc {
     fn read(&mut self, _base: u64, offset: u64, data: &mut [u8]) {
         let mut read_ok = true;
@@ -176,10 +286,10 @@ impl BusDevice for Rtc {
                     self.match_value
                 }
                 RTCLR => self.load,
-                RTCCR => 1,   // RTC is always enabled.
-                RTCIMSC => 0, // Interrupt is always disabled.
-                RTCRIS => 0,
-                RTCMIS => 0,
+                RTCCR => 1, // RTC is always enabled.
+                RTCIMSC => self.imsc,
+                RTCRIS => self.ris,
+                RTCMIS => self.ris & self.imsc,
                 _ => {
                     read_ok = false;
                     0
@@ -219,76 +329,15 @@ impl BusDevice for Rtc {
 mod tests {
     use super::*;
     use crate::{
-        read_be_u16, read_be_u32, read_le_i32, read_le_u16, read_le_u64, write_be_u16,
-        write_be_u32, write_le_i32, write_le_u16, write_le_u64,
+        read_be_u16, read_be_u32, read_le_i32, read_le_u16, read_le_u32, read_le_u64, write_be_u16,
+        write_be_u32, write_le_i32, write_le_u16, write_le_u32, write_le_u64,
     };
+    use std::sync::Arc;
+    use vm_device::interrupt::{InterruptIndex, InterruptSourceConfig};
+    use vmm_sys_util::eventfd::EventFd;
 
     const LEGACY_RTC_MAPPED_IO_START: u64 = 0x0901_0000;
 
-    struct LocalTime {
-        sec: i32,
-        min: i32,
-        hour: i32,
-        mday: i32,
-        mon: i32,
-        year: i32,
-        nsec: i64,
-    }
-
-    impl LocalTime {
-        fn now() -> LocalTime {
-            let mut timespec = libc::timespec {
-                tv_sec: 0,
-                tv_nsec: 0,
-            };
-            let mut tm: libc::tm = libc::tm {
-                tm_sec: 0,
-                tm_min: 0,
-                tm_hour: 0,
-                tm_mday: 0,
-                tm_mon: 0,
-                tm_year: 0,
-                tm_wday: 0,
-                tm_yday: 0,
-                tm_isdst: 0,
-                tm_gmtoff: 0,
-                tm_zone: std::ptr::null(),
-            };
-
-            // SAFETY: the parameters are valid.
-            unsafe {
-                libc::clock_gettime(libc::CLOCK_REALTIME, &mut timespec);
-                libc::localtime_r(&timespec.tv_sec, &mut tm);
-            }
-
-            LocalTime {
-                sec: tm.tm_sec,
-                min: tm.tm_min,
-                hour: tm.tm_hour,
-                mday: tm.tm_mday,
-                mon: tm.tm_mon,
-                year: tm.tm_year,
-                nsec: timespec.tv_nsec,
-            }
-        }
-    }
-
-    impl std::fmt::Display for LocalTime {
-        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-            write!(
-                f,
-                "{}-{:02}-{:02}T{:02}:{:02}:{:02}.{:09}",
-                self.year + 1900,
-                self.mon + 1,
-                self.mday,
-                self.hour,
-                self.min,
-                self.sec,
-                self.nsec
-            )
-        }
-    }
-
     #[test]
     fn test_get_time() {
         for _ in 0..1000 {
@@ -350,9 +399,45 @@ mod tests {
         assert!(seconds_to_nanoseconds(9_223_372_037).is_none());
     }
 
+    struct TestInterrupt {
+        event_fd: EventFd,
+    }
+
+    impl InterruptSourceGroup for TestInterrupt {
+        fn trigger(&self, _index: InterruptIndex) -> result::Result<(), std::io::Error> {
+            self.event_fd.write(1)
+        }
+
+        fn update(
+            &self,
+            _index: InterruptIndex,
+            _config: InterruptSourceConfig,
+            _masked: bool,
+            _set_gsi: bool,
+        ) -> result::Result<(), std::io::Error> {
+            Ok(())
+        }
+
+        fn set_gsi(&self) -> result::Result<(), std::io::Error> {
+            Ok(())
+        }
+
+        fn notifier(&self, _index: InterruptIndex) -> Option<EventFd> {
+            Some(self.event_fd.try_clone().unwrap())
+        }
+    }
+
+    impl TestInterrupt {
+        fn new(event_fd: EventFd) -> Self {
+            TestInterrupt { event_fd }
+        }
+    }
+
     #[test]
     fn test_rtc_read_write_and_event() {
-        let mut rtc = Rtc::new();
+        let intr_evt = EventFd::new(libc::EFD_NONBLOCK).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.
@@ -375,13 +460,15 @@ mod tests {
         assert_eq!((v / NANOS_PER_SECOND) as u32, v_read);
 
         // Read and write to IMSC register.
-        // Test with non zero value. Our device ignores the write.
+        // Test with non zero value.
         let non_zero = 1;
         write_le_u32(&mut data, non_zero);
         rtc.write(LEGACY_RTC_MAPPED_IO_START, RTCIMSC, &data);
+        // The interrupt line should be on.
+        assert!(rtc.interrupt.notifier(0).unwrap().read().unwrap() == 1);
         rtc.read(LEGACY_RTC_MAPPED_IO_START, RTCIMSC, &mut data);
         let v = read_le_u32(&data);
-        assert_eq!(0, v);
+        assert_eq!(non_zero & 1, v);
 
         // Now test with 0.
         write_le_u32(&mut data, 0);
@@ -393,6 +480,8 @@ mod tests {
         // Read and write to the ICR register.
         write_le_u32(&mut data, 1);
         rtc.write(LEGACY_RTC_MAPPED_IO_START, RTCICR, &data);
+        // The interrupt line should be on.
+        assert!(rtc.interrupt.notifier(0).unwrap().read().unwrap() > 1);
         let v_before = read_le_u32(&data);
 
         rtc.read(LEGACY_RTC_MAPPED_IO_START, RTCICR, &mut data);

devices/src/legacy/serial.rs

@@ -8,11 +8,13 @@
 use std::collections::VecDeque;
 use std::sync::{Arc, Barrier};
 use std::{io, result};
-
-use serde::{Deserialize, Serialize};
-use vm_device::BusDevice;
+use versionize::{VersionMap, Versionize, VersionizeResult};
+use versionize_derive::Versionize;
 use vm_device::interrupt::InterruptSourceGroup;
-use vm_migration::{Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
+use vm_device::BusDevice;
+use vm_migration::{
+    Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable, VersionMapped,
+};
 use vmm_sys_util::errno::Result;
 
 const LOOP_SIZE: usize = 0x40;
@@ -72,7 +74,7 @@ pub struct Serial {
     out: Option<Box<dyn io::Write + Send>>,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Versionize)]
 pub struct SerialState {
     interrupt_enable: u8,
     interrupt_identification: u8,
@@ -84,6 +86,7 @@ pub struct SerialState {
     baud_divisor: u16,
     in_buffer: Vec<u8>,
 }
+impl VersionMapped for SerialState {}
 
 impl Serial {
     pub fn new(
@@ -331,7 +334,7 @@ impl Snapshottable for Serial {
     }
 
     fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
-        Snapshot::new_from_state(&self.state())
+        Snapshot::new_from_versioned_state(&self.state())
     }
 }
 
@@ -341,13 +344,12 @@ impl Migratable for Serial {}
 
 #[cfg(test)]
 mod tests {
-    use std::sync::Mutex;
-
+    use super::*;
+    use std::io;
+    use std::sync::{Arc, Mutex};
     use vm_device::interrupt::{InterruptIndex, InterruptSourceConfig};
     use vmm_sys_util::eventfd::EventFd;
 
-    use super::*;
-
     const SERIAL_NAME: &str = "serial";
 
     struct TestInterrupt {
@@ -414,11 +416,14 @@ mod tests {
             None,
         );
 
-        serial.write(0, DATA as u64, b"xy");
-        serial.write(0, DATA as u64, b"a");
-        serial.write(0, DATA as u64, b"b");
-        serial.write(0, DATA as u64, b"c");
-        assert_eq!(serial_out.buf.lock().unwrap().as_slice(), b"abc");
+        serial.write(0, DATA as u64, &[b'x', b'y']);
+        serial.write(0, DATA as u64, &[b'a']);
+        serial.write(0, DATA as u64, &[b'b']);
+        serial.write(0, DATA as u64, &[b'c']);
+        assert_eq!(
+            serial_out.buf.lock().unwrap().as_slice(),
+            &[b'a', b'b', b'c']
+        );
     }
 
     #[test]
@@ -434,9 +439,9 @@ mod tests {
 
         // write 1 to the interrupt event fd, so that read doesn't block in case the event fd
         // counter doesn't change (for 0 it blocks)
-        intr_evt.write(1).unwrap();
+        assert!(intr_evt.write(1).is_ok());
         serial.write(0, IER as u64, &[IER_RECV_BIT]);
-        serial.queue_input_bytes(b"abc").unwrap();
+        serial.queue_input_bytes(&[b'a', b'b', b'c']).unwrap();
 
         assert_eq!(intr_evt.read().unwrap(), 2);
 
@@ -471,9 +476,9 @@ mod tests {
 
         // write 1 to the interrupt event fd, so that read doesn't block in case the event fd
         // counter doesn't change (for 0 it blocks)
-        intr_evt.write(1).unwrap();
+        assert!(intr_evt.write(1).is_ok());
         serial.write(0, IER as u64, &[IER_THR_BIT]);
-        serial.write(0, DATA as u64, b"a");
+        serial.write(0, DATA as u64, &[b'a']);
 
         assert_eq!(intr_evt.read().unwrap(), 2);
         let mut data = [0u8];
@@ -515,9 +520,9 @@ mod tests {
         );
 
         serial.write(0, MCR as u64, &[MCR_LOOP_BIT]);
-        serial.write(0, DATA as u64, b"a");
-        serial.write(0, DATA as u64, b"b");
-        serial.write(0, DATA as u64, b"c");
+        serial.write(0, DATA as u64, &[b'a']);
+        serial.write(0, DATA as u64, &[b'b']);
+        serial.write(0, DATA as u64, &[b'c']);
 
         let mut data = [0u8];
         serial.read(0, MSR as u64, &mut data[..]);

devices/src/legacy/uart_pl011.rs

@@ -6,18 +6,19 @@
 //! This module implements an ARM PrimeCell UART(PL011).
 //!
 
+use crate::{read_le_u32, write_le_u32};
 use std::collections::VecDeque;
+use std::fmt;
 use std::sync::{Arc, Barrier};
 use std::time::Instant;
 use std::{io, result};
-
-use serde::{Deserialize, Serialize};
-use thiserror::Error;
-use vm_device::BusDevice;
+use versionize::{VersionMap, Versionize, VersionizeResult};
+use versionize_derive::Versionize;
 use vm_device::interrupt::InterruptSourceGroup;
-use vm_migration::{Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
-
-use crate::{read_le_u32, write_le_u32};
+use vm_device::BusDevice;
+use vm_migration::{
+    Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable, VersionMapped,
+};
 
 /* Registers */
 const UARTDR: u64 = 0;
@@ -47,18 +48,25 @@ const PL011_ID: [u8; 8] = [0x11, 0x10, 0x14, 0x00, 0x0d, 0xf0, 0x05, 0xb1];
 const AMBA_ID_LOW: u64 = 0x3f8;
 const AMBA_ID_HIGH: u64 = 0x401;
 
-#[derive(Debug, Error)]
+#[derive(Debug)]
 pub enum Error {
-    #[error("pl011_write: Bad Write Offset: {0}")]
     BadWriteOffset(u64),
-    #[error("pl011: DMA not implemented")]
     DmaNotImplemented,
-    #[error("Failed to trigger interrupt")]
-    InterruptFailure(#[source] io::Error),
-    #[error("Failed to write")]
-    WriteAllFailure(#[source] io::Error),
-    #[error("Failed to flush")]
-    FlushFailure(#[source] io::Error),
+    InterruptFailure(io::Error),
+    WriteAllFailure(io::Error),
+    FlushFailure(io::Error),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Error::BadWriteOffset(offset) => write!(f, "pl011_write: Bad Write Offset: {offset}"),
+            Error::DmaNotImplemented => write!(f, "pl011: DMA not implemented."),
+            Error::InterruptFailure(e) => write!(f, "Failed to trigger interrupt: {e}"),
+            Error::WriteAllFailure(e) => write!(f, "Failed to write: {e}"),
+            Error::FlushFailure(e) => write!(f, "Failed to flush: {e}"),
+        }
+    }
 }
 
 type Result<T> = result::Result<T, Error>;
@@ -86,7 +94,7 @@ pub struct Pl011 {
     timestamp: std::time::Instant,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Versionize)]
 pub struct Pl011State {
     flags: u32,
     lcr: u32,
@@ -105,6 +113,8 @@ pub struct Pl011State {
     read_trigger: u32,
 }
 
+impl VersionMapped for Pl011State {}
+
 impl Pl011 {
     /// Constructs an AMBA PL011 UART device.
     pub fn new(
@@ -444,7 +454,7 @@ impl Snapshottable for Pl011 {
     }
 
     fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
-        Snapshot::new_from_state(&self.state())
+        Snapshot::new_from_versioned_state(&self.state())
     }
 }
 
@@ -454,13 +464,12 @@ impl Migratable for Pl011 {}
 
 #[cfg(test)]
 mod tests {
-    use std::sync::Mutex;
-
+    use super::*;
+    use std::io;
+    use std::sync::{Arc, Mutex};
     use vm_device::interrupt::{InterruptIndex, InterruptSourceConfig};
     use vmm_sys_util::eventfd::EventFd;
 
-    use super::*;
-
     const SERIAL_NAME: &str = "serial";
 
     struct TestInterrupt {
@@ -528,11 +537,14 @@ mod tests {
             None,
         );
 
-        pl011.write(0, UARTDR, b"xy");
-        pl011.write(0, UARTDR, b"a");
-        pl011.write(0, UARTDR, b"b");
-        pl011.write(0, UARTDR, b"c");
-        assert_eq!(pl011_out.buf.lock().unwrap().as_slice(), b"xabc");
+        pl011.write(0, UARTDR, &[b'x', b'y']);
+        pl011.write(0, UARTDR, &[b'a']);
+        pl011.write(0, UARTDR, &[b'b']);
+        pl011.write(0, UARTDR, &[b'c']);
+        assert_eq!(
+            pl011_out.buf.lock().unwrap().as_slice(),
+            &[b'x', b'a', b'b', b'c']
+        );
     }
 
     #[test]
@@ -549,8 +561,8 @@ mod tests {
 
         // write 1 to the interrupt event fd, so that read doesn't block in case the event fd
         // counter doesn't change (for 0 it blocks)
-        intr_evt.write(1).unwrap();
-        pl011.queue_input_bytes(b"abc").unwrap();
+        assert!(intr_evt.write(1).is_ok());
+        pl011.queue_input_bytes(&[b'a', b'b', b'c']).unwrap();
 
         assert_eq!(intr_evt.read().unwrap(), 2);