[PATCH v2 2/2] gitlab-ci: add an ARM32 qemu-based smoke test

[Stefano Stabellini <sstabellini@kernel.org>]

Add a minimal ARM32 smoke test based on qemu-system-arm, as provided by
the test-artifacts qemu container. The minimal test simply boots Xen
(built from previous build stages) and Dom0. The test is fetching the
Dom0 kernel and initrd from Debian Jessie: they work just fine and this
way we don't have to maintain a build for them too.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>

---
Changes in v2:
- improve comments
- don't limit dom0 cpus
- decrease mem to 1024M and dom0_mem=512M
- use Debian Bullseye instead of Jessie
---
 automation/gitlab-ci/test.yaml         | 23 ++++++++
 automation/scripts/qemu-smoke-arm32.sh | 72 ++++++++++++++++++++++++++
 2 files changed, 95 insertions(+)
 create mode 100755 automation/scripts/qemu-smoke-arm32.sh

diff --git a/automation/gitlab-ci/test.yaml b/automation/gitlab-ci/test.yaml
index ec2a2e1607..42cd725a12 100644
--- a/automation/gitlab-ci/test.yaml
+++ b/automation/gitlab-ci/test.yaml
@@ -95,6 +95,29 @@ qemu-smoke-arm64-gcc:
     - /^coverity-tested\/.*/
     - /^stable-.*/
 
+qemu-smoke-arm32-gcc:
+  stage: test
+  image: registry.gitlab.com/xen-project/xen/${CONTAINER}
+  variables:
+    CONTAINER: debian:unstable-arm64v8
+  script:
+    - ./automation/scripts/qemu-smoke-arm32.sh 2>&1 | tee qemu-smoke-arm32.log
+  dependencies:
+    - debian-unstable-gcc-arm32
+    - qemu-system-aarch64-6.0.0-arm32-export
+  artifacts:
+    paths:
+      - smoke.serial
+      - '*.log'
+    when: always
+  tags:
+    - arm64
+  except:
+    - master
+    - smoke
+    - /^coverity-tested\/.*/
+    - /^stable-.*/
+
 qemu-smoke-x86-64-gcc:
   stage: test
   image: registry.gitlab.com/xen-project/xen/${CONTAINER}
diff --git a/automation/scripts/qemu-smoke-arm32.sh b/automation/scripts/qemu-smoke-arm32.sh
new file mode 100755
index 0000000000..11883bed3c
--- /dev/null
+++ b/automation/scripts/qemu-smoke-arm32.sh
@@ -0,0 +1,72 @@
+#!/bin/bash
+
+set -ex
+
+export DEBIAN_FRONTENT=noninteractive
+apt-get -qy update
+apt-get -qy install --no-install-recommends device-tree-compiler \
+                                            curl
+
+cd binaries
+curl -fsSLO http://http.us.debian.org/debian/dists/jessie/main/installer-armhf/current/images/netboot/vmlinuz
+curl -fsSLO http://http.us.debian.org/debian/dists/jessie/main/installer-armhf/current/images/netboot/initrd.gz
+
+kernel=`stat -L --printf="%s" vmlinuz`
+initrd=`stat -L --printf="%s" initrd.gz`
+
+# For Xen, we need a couple of more node. Dump the DT from QEMU and add them
+# 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-6.0 \
+   -machine virtualization=true \
+   -smp 4 \
+   -m 1024 \
+   -serial stdio \
+   -monitor none \
+   -display none \
+   -machine dumpdtb=virt.dtb
+
+dtc -I dtb -O dts virt.dtb > virt.dts
+
+cat >> virt.dts << EOF
+/ {
+	chosen {
+		#address-cells = <0x2>;
+		#size-cells = <0x2>;
+		stdout-path = "/pl011@9000000";
+        xen,xen-bootargs = "console=dtuart dtuart=/pl011@9000000 dom0_mem=512M bootscrub=0";
+		xen,dom0-bootargs = "console=tty0 console=hvc0 earlyprintk clk_ignore_unused root=/dev/ram0 rdinit=/bin/sh init=/bin/sh";
+		dom0 {
+			compatible = "xen,linux-zimage", "xen,multiboot-module";
+			reg = <0x0 0x1000000 0x0 $kernel>;
+		};
+        dom0-ramdisk {
+			compatible = "xen,linux-initrd", "xen,multiboot-module";
+			reg = <0x0 0x3200000 0x0 $initrd>;
+		};
+	};
+};
+EOF
+dtc -I dts -O dtb virt.dts > virt.dtb
+
+rm -f smoke.serial
+set +e
+timeout -k 1 240 \
+./qemu-system-arm \
+   -machine virt-6.0 \
+   -machine virtualization=true \
+   -smp 4 \
+   -m 1024 \
+   -serial stdio \
+   -monitor none \
+   -display none \
+   -dtb virt.dtb \
+   -no-reboot \
+   -kernel ./xen \
+   -device loader,file=./vmlinuz,addr=0x1000000 \
+   -device loader,file=./initrd.gz,addr=0x3200000 |& tee smoke.serial
+
+set -e
+(grep -q "^BusyBox" smoke.serial) || exit 1
+exit 0
-- 
2.25.1