CI: Add full AArch64 KVM support

Build a kernel for AArch64 and run it under virtme just like we do for
x86-64.

This requires adding support for the AArch64 defconfig variant, and
accommodating for the fact that it builds DRM as a module by default
rather than built in. The virtme branch we are using has also been
rebased on top of newer virtme upstream which unbreaks AArch64.

Signed-off-by: Daniel Stone <daniels@collabora.com>

.gitlab-ci.yml

@@ -43,7 +43,7 @@
 variables:
   FDO_UPSTREAM_REPO: wayland/weston
   FDO_REPO_SUFFIX: "$BUILD_OS/$BUILD_ARCH"
-  FDO_DISTRIBUTION_TAG: '2021-08-02.2-meson'
+  FDO_DISTRIBUTION_TAG: '2021-08-02.3-aarch64-virt'
 
 
 include:
@@ -109,6 +109,9 @@ check-commit:
     - .os-debian
   variables:
     BUILD_ARCH: "aarch64"
+    KERNEL_IMAGE: "Image"
+    KERNEL_DEFCONFIG: "defconfig"
+    QEMU_SMP: 8 # built-in QEmu limit
 
 # Build our base container image, which contains the core distribution, the
 # toolchain, and all our build dependencies. This will be reused in the build
@@ -156,7 +159,8 @@ aarch64-debian-container_prep:
   - meson --prefix="$PREFIX" -Db_sanitize=address ${MESON_OPTIONS} ..
   - ninja -k0 -j${FDO_CI_CONCURRENT:-4}
   - ninja install
-  - virtme-run --rw --pwd --kimg /weston-virtme/${KERNEL_IMAGE} --kopt quiet --script-dir ../.gitlab-ci/virtme-scripts --qemu-opts -m 4096 -smp ${FDO_CI_CONCURRENT:-4}
+  - test -n "${QEMU_SMP}" || QEMU_SMP=${FDO_CI_CONCURRENT:-4}
+  - virtme-run --rw --pwd --kimg /weston-virtme/${KERNEL_IMAGE} --kopt quiet --script-dir ../.gitlab-ci/virtme-scripts --qemu-opts -m 4096 -smp ${QEMU_SMP}
   - TEST_RES=$(cat $TESTS_RES_PATH)
   - rm $TESTS_RES_PATH
   - cp -R /weston-virtme ./
@@ -222,9 +226,18 @@ aarch64-debian-container_prep:
     - job: x86_64-debian-container_prep
       artifacts: false
 
+.test-env-debian-aarch64:
+  tags:
+    - kvm-aarch64
+  extends:
+    - .build-env-debian-aarch64
+    - .build-and-test
+  needs:
+    - job: aarch64-debian-container_prep
+      artifacts: false
+
 # Full build, used for testing under KVM.
-x86_64-debian-full-build:
+.build-options-full:
-  extends: .test-env-debian-x86_64
   variables:
     MESON_OPTIONS: >
       -Doptimization=0
@@ -240,6 +253,16 @@ x86_64-debian-full-build:
     reports:
       cobertura: $BUILDDIR/meson-logs/coverage.xml
 
+x86_64-debian-full-build:
+  extends:
+    - .test-env-debian-x86_64
+    - .build-options-full
+
+aarch64-debian-full-build:
+  extends:
+    - .test-env-debian-aarch64
+    - .build-options-full
+
 # Docs should be invariant on all architectures, so we only do it on Debian
 # x86-64.
 docs-build:
@@ -269,8 +292,7 @@ x86_64-debian-no-gl-build:
 
 aarch64-debian-no-gl-build:
   extends:
-    - .build-env-debian-aarch64
+    - .test-env-debian-aarch64
-    - .build-no-test
     - .build-options-no-gl
 
 # Expose docs and coverage reports, so we can show users any changes to these

.gitlab-ci/build-deps.sh

@@ -44,12 +44,17 @@ pip3 install sphinx_rtd_theme==0.4.3 --user
 # results: --script-sh and --script-exec. Unfornutately they are not completely
 # implemented yet, so we had some trouble to use them and it was becoming
 # hackery.
-if [[ -n "${KERNEL_DEFCONFIG}" ]]; then
+#
+# The fork pulls in this support from the original GitHub PR, rebased on top of
+# a newer upstream version which fixes AArch64 support.
+if [[ -n "$KERNEL_DEFCONFIG" ]]; then
 	git clone --depth=1 --branch=drm-next-2020-06-11-1 https://anongit.freedesktop.org/git/drm/drm.git linux
 	cd linux
 
 	if [[ "${BUILD_ARCH}" = "x86-64" ]]; then
 		LINUX_ARCH=x86
+	elif [[ "$BUILD_ARCH" = "aarch64" ]]; then
+		LINUX_ARCH=arm64
 	else
 		echo "Invalid or missing \$BUILD_ARCH"
 		exit 1
@@ -66,18 +71,23 @@ if [[ -n "${KERNEL_DEFCONFIG}" ]]; then
 
 	make ARCH=${LINUX_ARCH} ${KERNEL_DEFCONFIG}
 	make ARCH=${LINUX_ARCH} kvmconfig
-	./scripts/config --enable CONFIG_DRM_VKMS
+	./scripts/config \
+		--enable CONFIG_DRM \
+		--enable CONFIG_DRM_KMS_HELPER \
+		--enable CONFIG_DRM_KMS_FB_HELPER \
+		--enable CONFIG_DRM_VKMS
 	make ARCH=${LINUX_ARCH} oldconfig
 	make ARCH=${LINUX_ARCH}
+
 	cd ..
 	mkdir /weston-virtme
 	mv linux/arch/${LINUX_ARCH}/boot/${KERNEL_IMAGE} /weston-virtme/
 	mv linux/.config /weston-virtme/.config
 	rm -rf linux
 
-	git clone https://github.com/ezequielgarcia/virtme
+	git clone https://github.com/fooishbar/virtme
 	cd virtme
-	git checkout -b snapshot 69e3cb83b3405edc99fcf9611f50012a4f210f78
+	git checkout -b snapshot 70e390c564cd09e0da287a7f2c04a6592e59e379
 	./setup.py install
 	cd ..
 fi