tsc_adjust from ubuntu_kvm_unit_tests failed on B-azure / B-KVM

[Po-Hsu Lin]

Found on instance Standard_E2s_v3, failed with:
  FAIL: MSR_IA32_TSC_ADJUST msr adjustment on tsc write

BUILD_HEAD=b5d7d7f1
timeout -k 1s --foreground 90s /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.1FGYUDVCpC -smp 1 -cpu host # -initrd /tmp/tmp.ZLleqO6Ay2
enabling apic
PASS: MSR_IA32_TSC_ADJUST msr initialization
PASS: MSR_IA32_TSC_ADJUST msr read / write
PASS: TSC adjustment for MSR_IA32_TSC_ADJUST value
PASS: MSR_IA32_TSC_ADJUST msr read / write
FAIL: MSR_IA32_TSC_ADJUST msr adjustment on tsc write
SUMMARY: 5 tests, 1 unexpected failures
FAIL tsc_adjust (5 tests, 1 unexpected failures)

[Po-Hsu Lin (cypressyew)]

Spotted on B-azure-hwe 5.0, instance Standard_D16s_v3

[Po-Hsu Lin (cypressyew)]

This could be found on B-KVM 4.15.0-1059.60 as well

Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/tsc_adjust'
BUILD_HEAD=4671e4ba
timeout -k 1s --foreground 90s /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.O9Tx55cl55 -smp 1 -cpu host # -initrd /tmp/tmp.3EBoO8L33G
enabling apic
PASS: MSR_IA32_TSC_ADJUST msr initialization
PASS: MSR_IA32_TSC_ADJUST msr read / write
PASS: TSC adjustment for MSR_IA32_TSC_ADJUST value
PASS: MSR_IA32_TSC_ADJUST msr read / write
FAIL: MSR_IA32_TSC_ADJUST msr adjustment on tsc write
SUMMARY: 5 tests, 1 unexpected failures
FAIL tsc_adjust (5 tests, 1 unexpected failures)

[Po-Hsu Lin (cypressyew)]

Didn't see this on B-KVM 4.15.0-1086.88-kvm
and neither on Azure 4.15.0-1109.121-azure

Closing this bug.