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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2021-12-16 17:52:12 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-12-19 19:35:29 +0100 |
| commit | 0b091a43d704997789c6d812b02167c8f5f9f061 (patch) | |
| tree | 9b04c07838fbb0adbd93cd98b52c75b13cd37b28 | |
| parent | 1aa2abb33a419090c7c87d4ae842a6347078ee12 (diff) | |
| download | lwn-0b091a43d704997789c6d812b02167c8f5f9f061.tar.gz lwn-0b091a43d704997789c6d812b02167c8f5f9f061.zip | |
KVM: selftests: vmx_pmu_msrs_test: Drop tests mangling guest visible CPUIDs
Host initiated writes to MSR_IA32_PERF_CAPABILITIES should not depend
on guest visible CPUIDs and (incorrect) KVM logic implementing it is
about to change. Also, KVM_SET_CPUID{,2} after KVM_RUN is now forbidden
and causes test to fail.
Reported-by: kernel test robot <oliver.sang@intel.com>
Fixes: feb627e8d6f6 ("KVM: x86: Forbid KVM_SET_CPUID{,2} after KVM_RUN")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20211216165213.338923-2-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/vmx_pmu_msrs_test.c | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_msrs_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_msrs_test.c index 23051d84b907..2454a1f2ca0c 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_msrs_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_msrs_test.c @@ -110,22 +110,5 @@ int main(int argc, char *argv[]) ret = _vcpu_set_msr(vm, 0, MSR_IA32_PERF_CAPABILITIES, PMU_CAP_LBR_FMT); TEST_ASSERT(ret == 0, "Bad PERF_CAPABILITIES didn't fail."); - /* testcase 4, set capabilities when we don't have PDCM bit */ - entry_1_0->ecx &= ~X86_FEATURE_PDCM; - vcpu_set_cpuid(vm, VCPU_ID, cpuid); - ret = _vcpu_set_msr(vm, 0, MSR_IA32_PERF_CAPABILITIES, host_cap.capabilities); - TEST_ASSERT(ret == 0, "Bad PERF_CAPABILITIES didn't fail."); - - /* testcase 5, set capabilities when we don't have PMU version bits */ - entry_1_0->ecx |= X86_FEATURE_PDCM; - eax.split.version_id = 0; - entry_1_0->ecx = eax.full; - vcpu_set_cpuid(vm, VCPU_ID, cpuid); - ret = _vcpu_set_msr(vm, 0, MSR_IA32_PERF_CAPABILITIES, PMU_CAP_FW_WRITES); - TEST_ASSERT(ret == 0, "Bad PERF_CAPABILITIES didn't fail."); - - vcpu_set_msr(vm, 0, MSR_IA32_PERF_CAPABILITIES, 0); - ASSERT_EQ(vcpu_get_msr(vm, VCPU_ID, MSR_IA32_PERF_CAPABILITIES), 0); - kvm_vm_free(vm); } |