Hi! This kvm unit test tests that all reserved bits of the MSR_IA32_FLUSH_CMD #GP, but apparently on some systems this test fails. For example I reproduced this on: model name : Intel(R) Xeon(R) CPU E3-1260L v5 @ 2.90GHz stepping : 3 microcode : 0xf0 As I see in the 'vmx_vcpu_after_set_cpuid', we passthough this msr to the guest AS IS, thus the unit test tests the microcode. So I suspect that the test actually caught a harmless microcode bug. What do you think we should do to workaround this? Maybe disable this check on affected cpus or turn it into a warning because MSR_IA32_FLUSH_CMD reserved bits test doesn't test KVM? Best regards, Maxim Levitsky
