build: Add aarch64 target to GitHub Actions build

This commit introduces matrix to add the aarch64 target. The unit tests
are disabled for aarch64 target because default GitHub Actions runners
are x86_64 only.

Signed-off-by: Akira Moroo <retrage01@gmail.com>

.github/workflows/build.yaml

@@ -9,30 +9,35 @@ jobs:
     if: github.event_name == 'pull_request'
     name: Build
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - target: x86_64-unknown-none.json
+            tests: true
+          - target: aarch64-unknown-none.json
+            tests: false
     steps:
       - name: Code checkout
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
-      - name: Install rust-src
-        run: rustup component add rust-src
-      - name: Install clippy
-        run: rustup component add clippy
-      - name: Install rustfmt
-        run: rustup component add rustfmt
+      - name: Install Rust components
+        run: rustup component add rust-src clippy rustfmt
       - name: Build (debug)
-        run: cargo build --target x86_64-unknown-none.json -Zbuild-std=core,alloc -Zbuild-std-features=compiler-builtins-mem
+        run: cargo build --target ${{ matrix.target }} -Zbuild-std=core,alloc -Zbuild-std-features=compiler-builtins-mem
       - name: Build (release)
-        run: cargo build --release --target x86_64-unknown-none.json -Zbuild-std=core,alloc -Zbuild-std-features=compiler-builtins-mem
+        run: cargo build --release --target ${{ matrix.target }} -Zbuild-std=core,alloc -Zbuild-std-features=compiler-builtins-mem
       - name: Clippy (default)
-        run: cargo clippy --target x86_64-unknown-none.json -Zbuild-std=core,alloc
+        run: cargo clippy --target ${{ matrix.target }} -Zbuild-std=core,alloc
       - name: Clippy (all targets, all features)
         run: cargo clippy --all-targets --all-features
       - name: Formatting
         run: cargo fmt --all -- --check 
-      - name: Unit tests
+      - if: ${{ matrix.tests }}
+        name: Unit tests
         run: |
           sudo apt-get install -y mtools
           bash scripts/run_unit_tests.sh

.github/workflows/docker-image.yaml

@@ -18,24 +18,32 @@ jobs:
       - name: Code checkout
         uses: actions/checkout@v2
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
       - name: Get active Rust toolchain
         id: get-toolchain
         run: echo "toolchain=`rustup show active-toolchain | cut -d ' ' -f1`" >> $GITHUB_ENV
 
       - name: Login to DockerHub
         if: ${{ github.repository == 'cloud-hypervisor/rust-hypervisor-firmware' && github.event_name == 'push' }}
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Build
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v3
         with:
           file: ./resources/Dockerfile
           build-args: |
             RUST_TOOLCHAIN=${{ env.toolchain }}
-          platforms: linux/amd64
+          platforms: |
+            linux/arm64
+            linux/amd64
           push: ${{ github.repository == 'cloud-hypervisor/rust-hypervisor-firmware' && github.event_name == 'push' }}
           tags: rusthypervisorfirmware/dev:latest