[PATCH v6 7/7] [DO NOT COMMIT] automation: add one test using an older unpatched Linux kernel

[Stefano Stabellini <stefano.stabellini@xxxxxxx>]

The original patch series broke compatibility with older Linux kernels.
In the meantime, Linux backported a fix that improves the general
behavior and also resolve the problem.

However, we still want to check Xen against possible regressions, even
against old unpatches kernels. We can use the older Linux kernel version
we had to do that.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxx>
---
 automation/gitlab-ci/build.yaml                 | 11 +++++++++++
 automation/gitlab-ci/test.yaml                  | 10 ++++++++++
 automation/scripts/qemu-smoke-dom0less-arm64.sh |  7 +++++--
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/automation/gitlab-ci/build.yaml b/automation/gitlab-ci/build.yaml
index 411b4902b5..0a867c3ced 100644
--- a/automation/gitlab-ci/build.yaml
+++ b/automation/gitlab-ci/build.yaml
@@ -269,6 +269,17 @@ alpine-3.18-arm64-rootfs-export:
   tags:
     - arm64
 
+kernel-5.19-arm64-export:
+  extends: .test-jobs-artifact-common
+  image: 
registry.gitlab.com/xen-project/xen/tests-artifacts/kernel:5.19-arm64v8
+  script:
+    - mkdir binaries && cp /Image binaries/Image
+  artifacts:
+    paths:
+      - binaries/Image
+  tags:
+    - arm64
+
 kernel-6.6.74-arm64-export:
   extends: .test-jobs-artifact-common
   image: 
registry.gitlab.com/xen-project/xen/tests-artifacts/kernel:6.6.74-arm64v8
diff --git a/automation/gitlab-ci/test.yaml b/automation/gitlab-ci/test.yaml
index 6ad45269ea..06ee2fcc7e 100644
--- a/automation/gitlab-ci/test.yaml
+++ b/automation/gitlab-ci/test.yaml
@@ -335,6 +335,16 @@ qemu-smoke-dom0less-arm64-gcc-debug:
     - *arm64-test-needs
     - alpine-3.18-gcc-debug-arm64
 
+qemu-smoke-dom0less-arm64-gcc-debug-old:
+  extends: .qemu-arm64
+  script:
+    - ./automation/scripts/qemu-smoke-dom0less-arm64.sh old 2>&1 | tee 
${LOGFILE}
+  needs:
+    - alpine-3.18-arm64-rootfs-export
+    - qemu-system-aarch64-6.0.0-arm64-export
+    - alpine-3.18-gcc-debug-arm64
+    - kernel-5.19-arm64-export
+
 qemu-smoke-dom0less-arm64-gcc-debug-gicv3:
   extends: .qemu-arm64
   script:
diff --git a/automation/scripts/qemu-smoke-dom0less-arm64.sh 
b/automation/scripts/qemu-smoke-dom0less-arm64.sh
index f72d209361..ddb158987a 100755
--- a/automation/scripts/qemu-smoke-dom0less-arm64.sh
+++ b/automation/scripts/qemu-smoke-dom0less-arm64.sh
@@ -7,7 +7,7 @@ test_variant=$1
 # Default GIC version
 gic_version="2"
 
-if [ -z "${test_variant}" ]; then
+if [ -z "${test_variant}" -o "${test_variant}" == "old" ]; then
     passed="ping test passed"
     domU_check="
 until ifconfig eth0 192.168.0.2 &> /dev/null && ping -c 10 192.168.0.1; do
@@ -203,7 +203,10 @@ fi
 rm -rf imagebuilder
 git clone --depth 1 https://gitlab.com/xen-project/imagebuilder.git
 bash imagebuilder/scripts/uboot-script-gen -t tftp -d binaries/ -c 
binaries/config
-
+if [ "${test_variant}" == "old" ]; then
+    sed -i "s/enabled/legacy/g" binaries/boot.source
+    mkimage -A arm64 -T script -C none -a 0x40200000 -e 0x40200000 -d 
binaries/boot.source binaries/boot.scr
+fi
 
 # Run the test
 rm -f smoke.serial
-- 
2.25.1