qemu/riscv64: Add riscv64 to the architectures supported

Add support for riscv64 to the gen-vm and run-vm scripts. Note this
means a couple of packages need to be installed (qemu-system-misc and
u-boot-qemu). Add this to our smoke-test GitHub workflow.

.github/workflows/smoke-test.yml

@@ -46,3 +46,23 @@ jobs:
         USERNAME: ubuntu
         PASS: password
         ARCH: arm64
+
+  ubuntu-latest-arm64:
+    name: ubuntu-latest-arm64
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out code using action/checkout
+      uses: actions/[email protected]
+    - name: Install a couple of packages via the apt package manager
+      run: sudo apt update && sudo apt install -y qemu-system-misc u-boot-qemu cloud-image-utils
+    - name: Generate an ssh key-pair for this test
+      run: ssh-keygen -t rsa -q -f "$HOME/.ssh/id_rsa" -N ""
+    - name: Run a riscv64 qemu-based ./gen-vm smoke-test
+      run: ./gen-vm
+      working-directory: qemu
+      env:
+        VM_NAME: qemu-minimal-smoke-test-arm64
+        KVM: none
+        USERNAME: ubuntu
+        PASS: password
+        ARCH: riscv64

qemu/gen-vm

@@ -135,6 +135,9 @@ if [ ${ARCH} == "amd64" ]; then
 elif [ ${ARCH} == "arm64" ]; then
     QARCH="aarch64"
     QARCH_ARGS="-machine virt,gic-version=max${KVM} -cpu max -bios /usr/share/qemu-efi-aarch64/QEMU_EFI.fd"
+elif [ ${ARCH} == "riscv64" ]; then
+    QARCH="riscv64"
+    QARCH_ARGS="-machine virt,${KVM} -kernel /usr/lib/u-boot/qemu-riscv64_smode/uboot.elf"
 else
     echo "Error: No ARCH mapping exists for ${ARCH}! Exiting."; exit -1
 fi
@@ -146,7 +149,8 @@ qemu-system-${QARCH} \
    -nographic \
    -drive if=virtio,format=qcow2,file=${IMAGES}/${VM_NAME}-backing.qcow2 \
    -drive if=virtio,format=qcow2,file=${IMAGES}/${VM_NAME}-seed.qcow2 \
-   -nic user,id=user0,model=virtio-net-pci
+   -netdev user,id=net0 \
+   -device virtio-net-pci,netdev=net0
 
 qemu-img create -F qcow2 -b ${IMAGES}/${VM_NAME}-backing.qcow2 -f qcow2 \
 	 ${IMAGES}/${VM_NAME}.qcow2

qemu/run-vm

@@ -40,6 +40,9 @@ if [ ${ARCH} == "amd64" ]; then
 elif [ ${ARCH} == "arm64" ]; then
     QARCH="aarch64"
     QARCH_ARGS="-machine virt,gic-version=max${KVM} -cpu max -bios /usr/share/qemu-efi-aarch64/QEMU_EFI.fd"
+elif [ ${ARCH} == "riscv64" ]; then
+    QARCH="riscv64"
+    QARCH_ARGS="-machine virt,${KVM} -kernel /usr/lib/u-boot/qemu-riscv64_smode/uboot.elf"
 else
     echo "Error: No ARCH mapping exists for ${ARCH}! Exiting."; exit -1
 fi
@@ -51,4 +54,5 @@ qemu-system-${QARCH} \
    ${FILESYSTEM_ARGS} \
    -nographic \
    -drive if=virtio,format=qcow2,file=${IMAGES}/${VM_NAME}.qcow2 \
-   -nic user,id=user0,model=virtio-net-pci,hostfwd=tcp::${SSH_PORT}-:22
+   -netdev user,id=net0,hostfwd=tcp::${SSH_PORT}-:22 \
+   -device virtio-net-pci,netdev=net0