gicv2-mmio in ubuntu_kvm_unit_tests failed with on X ARM64 Moonshots

[Po-Hsu Lin]

Issue found on X 4.4.0-215.247 ARM64 Moonshot

Test log:
Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/gicv2-mmio'
 BUILD_HEAD=1593e88a
 timeout -k 1s --foreground 90s /usr/bin/qemu-system-aarch64 -nodefaults -machine virt,gic-version=host,accel=kvm -cpu host -device virtio-serial-device -device virtconsole,chardev=ctd -chardev testdev,id=ctd -device pci-testdev -display none -serial stdio -kernel /tmp/tmp.U1fR4DP0rS -smp 8 -machine gic-version=2 -append mmio # -initrd /tmp/tmp.HYPfVhVOna
 INFO: gicv2: mmio: number of implemented SPIs: 256
 INFO: gicv2: mmio: nr_cpus=8
 PASS: gicv2: mmio: all CPUs have interrupts
 INFO: gicv2: mmio: IIDR: 0x4b00043b
 PASS: gicv2: mmio: GICD_TYPER is read-only
 PASS: gicv2: mmio: GICD_IIDR is read-only
 PASS: gicv2: mmio: ICPIDR2 is read-only
 INFO: gicv2: mmio: value of ICPIDR2: 0x00000000
 PASS: gicv2: mmio: IPRIORITYR: consistent priority masking
 INFO: gicv2: mmio: IPRIORITYR: priority mask is 0xffffffff
 PASS: gicv2: mmio: IPRIORITYR: implements at least 4 priority bits
 INFO: gicv2: mmio: IPRIORITYR: 8 priority bits implemented
 PASS: gicv2: mmio: IPRIORITYR: clearing priorities
 PASS: gicv2: mmio: IPRIORITYR: accesses beyond limit RAZ/WI
 PASS: gicv2: mmio: IPRIORITYR: accessing last SPIs
 PASS: gicv2: mmio: IPRIORITYR: priorities are preserved
 PASS: gicv2: mmio: IPRIORITYR: byte reads successful
 PASS: gicv2: mmio: IPRIORITYR: byte writes successful
 SKIP: gicv2: mmio: ITARGETSR: CPU masking (all CPUs implemented)
 PASS: gicv2: mmio: ITARGETSR: accesses beyond limit RAZ/WI
 FAIL: gicv2: mmio: ITARGETSR: register content preserved
 INFO: gicv2: mmio: ITARGETSR: writing 0103020f reads back as 01010201
 PASS: gicv2: mmio: ITARGETSR: byte reads successful
 FAIL: gicv2: mmio: ITARGETSR: byte writes successful
 INFO: gicv2: mmio: ITARGETSR: writing 0x1f into bytes 2 => 0x01010201
 SUMMARY: 17 tests, 2 unexpected failures, 1 skipped
 FAIL gicv2-mmio (17 tests, 2 unexpected failures, 1 skipped)

This is not a regression, this failure can be found on 4.4.0-214.246 as well.

[Po-Hsu Lin (cypressyew)]

With kvm-unit-test repo updated to d8a4f9e5 (ci: Update the list of tests that we run in the Fedora Cirrus-CI), this test will be skipped on this moonshot system:

 Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/gicv2-mmio'
 BUILD_HEAD=63cdb04b
 timeout -k 1s --foreground 90s /usr/bin/qemu-system-aarch64 -nodefaults -machine virt,gic-version=host -accel kvm -cpu host -device virtio-serial-device -device virtconsole,chardev=ctd -chardev testdev,id=ctd -device pci-testdev -display none -serial stdio -kernel _NO_FILE_4Uhere_ -smp 8 -machine gic-version=2 -append mmio # -initrd /tmp/tmp.M5OAJeAgXf
 qemu-system-aarch64: -accel: invalid option
 SKIP gicv2-mmio (qemu-system-aarch64: -accel: invalid option)
GOOD ubuntu_kvm_unit_tests.gicv2-mmio ubuntu_kvm_unit_tests.gicv2-mmio timestamp=1665027873 localtime=Oct 06 03:44:33 completed successfully