[PATCH 1/3] automation: Add arm32 dom0less testing

[Michal Orzel <michal.orzel@xxxxxxx>]

At the moment, we only perform a single arm32 test in our CI, checking
whether dom0 boots successfully or not. This is mostly because we do not
have any arm32 runners and we only execute a hypervisor only build.

In order not to leave the arm32 testing in such a poor state, add a
script qemu-smoke-dom0less-arm32.sh to start testing true dom0less
configuration, in which case we do not need a dom0 with a toolstack.

The script is mostly based on the one used for dom0 arm32 testing as well
as the one used for dom0less arm64 testing. We obtain Debian Bullseye
kernel and Alpine Linux busybox-based rootfs. Depending on the test
variant, we prepare a test case contained within domU_check variable,
that will be executed as part of /init script.

Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
---
 automation/gitlab-ci/test.yaml                | 16 ++++
 .../scripts/qemu-smoke-dom0less-arm32.sh      | 89 +++++++++++++++++++
 2 files changed, 105 insertions(+)
 create mode 100755 automation/scripts/qemu-smoke-dom0less-arm32.sh

diff --git a/automation/gitlab-ci/test.yaml b/automation/gitlab-ci/test.yaml
index ce543ef5c0ef..84ab1fee50a4 100644
--- a/automation/gitlab-ci/test.yaml
+++ b/automation/gitlab-ci/test.yaml
@@ -210,6 +210,22 @@ qemu-smoke-dom0-arm32-gcc-debug:
     - *arm32-test-needs
     - debian-unstable-gcc-arm32-debug
 
+qemu-smoke-dom0less-arm32-gcc:
+  extends: .qemu-arm32
+  script:
+    - ./automation/scripts/qemu-smoke-dom0less-arm32.sh 2>&1 | tee ${LOGFILE}
+  needs:
+    - *arm32-test-needs
+    - debian-unstable-gcc-arm32
+
+qemu-smoke-dom0less-arm32-gcc-debug:
+  extends: .qemu-arm32
+  script:
+    - ./automation/scripts/qemu-smoke-dom0less-arm32.sh 2>&1 | tee ${LOGFILE}
+  needs:
+    - *arm32-test-needs
+    - debian-unstable-gcc-arm32-debug
+
 qemu-alpine-x86_64-gcc:
   extends: .qemu-x86-64
   script:
diff --git a/automation/scripts/qemu-smoke-dom0less-arm32.sh 
b/automation/scripts/qemu-smoke-dom0less-arm32.sh
new file mode 100755
index 000000000000..c81529cbbfd0
--- /dev/null
+++ b/automation/scripts/qemu-smoke-dom0less-arm32.sh
@@ -0,0 +1,89 @@
+#!/bin/bash
+
+set -ex
+
+test_variant=$1
+
+cd binaries
+# Use the kernel from Debian
+curl --fail --silent --show-error --location --output vmlinuz 
https://deb.debian.org/debian/dists/bullseye/main/installer-armhf/current/images/netboot/vmlinuz
+# Use a tiny initrd based on busybox from Alpine Linux
+curl --fail --silent --show-error --location --output initrd.tar.gz 
https://dl-cdn.alpinelinux.org/alpine/v3.15/releases/armhf/alpine-minirootfs-3.15.1-armhf.tar.gz
+
+if [ -z "${test_variant}" ]; then
+    passed="generic test passed"
+    domU_check="
+echo \"${passed}\"
+"
+fi
+
+# domU rootfs
+mkdir rootfs
+cd rootfs
+tar xvzf ../initrd.tar.gz
+echo "#!/bin/sh
+
+mount -t proc proc /proc
+mount -t sysfs sysfs /sys
+mount -t devtmpfs devtmpfs /dev
+${domU_check}
+/bin/sh" > init
+chmod +x init
+find . | cpio -H newc -o | gzip > ../initrd.gz
+cd ..
+
+# XXX QEMU looks for "efi-virtio.rom" even if it is unneeded
+curl -fsSLO https://github.com/qemu/qemu/raw/v5.2.0/pc-bios/efi-virtio.rom
+./qemu-system-arm \
+    -machine virt \
+    -machine virtualization=true \
+    -smp 4 \
+    -m 1024 \
+    -serial stdio \
+    -monitor none \
+    -display none \
+    -machine dumpdtb=virt.dtb
+
+# ImageBuilder
+echo 'MEMORY_START="0x40000000"
+MEMORY_END="0x80000000"
+
+DEVICE_TREE="virt.dtb"
+XEN="xen"
+XEN_CMD="console=dtuart bootscrub=0"
+
+DOMU_KERNEL[0]="vmlinuz"
+DOMU_RAMDISK[0]="initrd.gz"
+DOMU_MEM[0]="512"
+NUM_DOMUS=1
+
+LOAD_CMD="tftpb"
+BOOT_CMD="bootm"
+UBOOT_SOURCE="boot.source"
+UBOOT_SCRIPT="boot.scr"' > config
+
+rm -rf imagebuilder
+git clone https://gitlab.com/ViryaOS/imagebuilder
+bash imagebuilder/scripts/uboot-script-gen -t tftp -d . -c config
+
+# Run the test
+rm -f smoke.serial
+set +e
+echo "  virtio scan; dhcp; tftpb 0x40000000 boot.scr; source 0x40000000"| \
+timeout -k 1 240 \
+./qemu-system-arm \
+    -machine virt \
+    -machine virtualization=true \
+    -smp 4 \
+    -m 1024 \
+    -serial stdio \
+    -monitor none \
+    -display none \
+    -no-reboot \
+    -device virtio-net-pci,netdev=n0 \
+    -netdev user,id=n0,tftp=./ \
+    -bios /usr/lib/u-boot/qemu_arm/u-boot.bin |& tee smoke.serial
+
+set -e
+(grep -q "${passed}" smoke.serial) || exit 1
+exit 0
-- 
2.25.1