KVM emulates full-width PMC writes in software, assert that KVM reports full-width writes as supported if PERF_CAPABILITIES is supported. Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> --- tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c index c3b0738e361b..035470b38400 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c @@ -110,6 +110,9 @@ int main(int argc, char *argv[]) host_cap.capabilities = kvm_get_feature_msr(MSR_IA32_PERF_CAPABILITIES); host_cap.capabilities &= (PMU_CAP_FW_WRITES | PMU_CAP_LBR_FMT); + TEST_ASSERT(host_cap.full_width_write, + "Full-width writes should always be supported"); + test_basic_perf_capabilities(host_cap); test_fungible_perf_capabilities(host_cap); test_immutable_perf_capabilities(host_cap); -- 2.40.0.rc1.284.g88254d51c5-goog
