s3 in ubuntu_kvm_unit_test failed with J-realtime on openstack AMD64

[Po-Hsu Lin]

s3 test in ubuntu_kvm_unit_test will fail with J-realtime on openstack amd64 instance. This issue can be seen after we start testing on openstack with 5.15.0-1036.39 in sru-20230320.

Test log:
 Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/s3'
 BUILD_HEAD=d8edb59a
 timeout -k 1s --foreground 90s /usr/bin/qemu-system-x86_64 --no-reboot -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=tcg -kernel /tmp/tmp.kPv8DQAliN -smp 1 # -initrd /tmp/tmp.AEqo1vC3cV
 enabling apic
 smp: waiting for 0 APs
 FACS is at 0x7fe0000
 resume vector addr is 0x7fe000c
 copy resume code from 0x400238
 PM1a event registers at 600
 FAIL s3

This issue still exist with the latest upstream kvm-unit-tests code (02d8befe99f8)
It's worthy to note that this test has passed with j/ibm on openstack amd64.