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KVM: selftests: vmx_pmu_msrs_test: Drop tests mangling guest visible CPUIDs

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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: feb627e8d6 ("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>
This commit is contained in:
Vitaly Kuznetsov 2021-12-16 17:52:12 +01:00 committed by Paolo Bonzini
parent 1aa2abb33a
commit 0b091a43d7
1 changed files with 0 additions and 17 deletions
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17
tools/testing/selftests/kvm/x86_64/vmx_pmu_msrs_test.c
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@ -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);
}