automation: add a QEMU based x86_64 Dom0/DomU test

Introduce a test based on QEMU to run Xen, Dom0 and start a DomU.
This is similar to the existing qemu-alpine-arm64.sh script and test.
The only differences are:
- use Debian's qemu-system-x86_64 (on ARM we build our own)
- use ipxe instead of u-boot and ImageBuilder

Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>

automation/gitlab-ci/test.yaml

@@ -47,6 +47,30 @@ qemu-alpine-arm64-gcc:
     - /^coverity-tested\/.*/
     - /^stable-.*/
 
+qemu-alpine-x86_64-gcc:
+  stage: test
+  image: registry.gitlab.com/xen-project/xen/${CONTAINER}
+  variables:
+    CONTAINER: debian:stretch
+  script:
+    - ./automation/scripts/qemu-alpine-x86_64.sh 2>&1 | tee qemu-smoke-x86_64.log
+  dependencies:
+    - alpine-3.12-gcc
+    - alpine-3.12-rootfs-export
+    - kernel-5.10.74-export
+  artifacts:
+    paths:
+      - smoke.serial
+      - '*.log'
+    when: always
+  tags:
+    - x86_64
+  except:
+    - master
+    - smoke
+    - /^coverity-tested\/.*/
+    - /^stable-.*/
+
 qemu-smoke-arm64-gcc:
   stage: test
   image: registry.gitlab.com/xen-project/xen/${CONTAINER}

automation/scripts/qemu-alpine-x86_64.sh

@@ -0,0 +1,95 @@
+#!/bin/bash
+
+set -ex
+
+apt-get -qy update
+apt-get -qy install --no-install-recommends cpio \
+                                            busybox-static
+
+# DomU Busybox
+cd binaries
+mkdir -p initrd
+mkdir -p initrd/bin
+mkdir -p initrd/sbin
+mkdir -p initrd/etc
+mkdir -p initrd/dev
+mkdir -p initrd/proc
+mkdir -p initrd/sys
+mkdir -p initrd/lib
+mkdir -p initrd/var
+mkdir -p initrd/mnt
+cp /bin/busybox initrd/bin/busybox
+initrd/bin/busybox --install initrd/bin
+echo "#!/bin/sh
+
+mount -t proc proc /proc
+mount -t sysfs sysfs /sys
+mount -t devtmpfs devtmpfs /dev
+/bin/sh" > initrd/init
+chmod +x initrd/init
+# DomU rootfs
+cd initrd
+find . | cpio --create --format='newc' | gzip > ../initrd.cpio.gz
+cd ..
+
+# initrd.tar.gz is Dom0 rootfs
+mkdir -p rootfs
+cd rootfs
+tar xvzf ../initrd.tar.gz
+mkdir proc
+mkdir run
+mkdir srv
+mkdir sys
+rm var/run
+cp -ar ../dist/install/* .
+mv ../initrd.cpio.gz ./root
+cp ../bzImage ./root
+echo "name=\"test\"
+memory=512
+vcpus=1
+kernel=\"/root/bzImage\"
+ramdisk=\"/root/initrd.cpio.gz\"
+extra=\"console=hvc0 root=/dev/ram0 rdinit=/bin/sh\"
+" > root/test.cfg
+echo "#!/bin/bash
+
+set -x
+
+export LD_LIBRARY_PATH=/usr/local/lib
+bash /etc/init.d/xencommons start
+
+xl list
+
+xl create -c /root/test.cfg
+
+" > etc/local.d/xen.start
+chmod +x etc/local.d/xen.start
+echo "rc_verbose=yes" >> etc/rc.conf
+# rebuild Dom0 rootfs
+find . |cpio -H newc -o|gzip > ../xen-rootfs.cpio.gz
+cd ../..
+
+cat >> binaries/pxelinux.0 << EOF
+#!ipxe
+
+kernel xen console=com1
+module bzImage console=hvc0
+module xen-rootfs.cpio.gz
+boot
+EOF
+
+# Run the test
+rm -f smoke.serial
+set +e
+timeout -k 1 720 \
+qemu-system-x86_64 \
+    -cpu qemu64,+svm \
+    -m 2G -smp 2 \
+    -monitor none -serial stdio \
+    -nographic \
+    -device virtio-net-pci,netdev=n0 \
+    -netdev user,id=n0,tftp=binaries,bootfile=/pxelinux.0 |& tee smoke.serial
+
+set -e
+(grep -q "Domain-0" smoke.serial && grep -q "BusyBox" smoke.serial) || exit 1
+exit 0