diff options
| author | Sean Christopherson <seanjc@google.com> | 2023-03-10 16:46:17 -0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-04-06 14:58:44 -0700 |
| commit | 8b95b4155523dcb5412a73c631c680098bcbbb40 (patch) | |
| tree | ecf5216bde38b93a0e0b6b2f1e676a111a042495 | |
| parent | 8ac2f774b9ead749720fe7a648e6c6ada57e01f3 (diff) | |
KVM: selftests: Add negative testcase for PEBS format in PERF_CAPABILITIES
Expand the immutable features sub-test for PERF_CAPABILITIES to verify
KVM rejects any attempt to use a PEBS format other than the host's.
Link: https://lore.kernel.org/r/20230311004618.920745-21-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c | 10 |
1 files changed, 10 insertions, 0 deletions
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 38aec88d733b..29aaa0419294 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 @@ -191,6 +191,16 @@ static void test_immutable_perf_capabilities(union perf_capabilities host_cap) val.lbr_format, host_cap.lbr_format); } + /* Ditto for the PEBS format. */ + for (val.pebs_format = 1; val.pebs_format; val.pebs_format++) { + if (val.pebs_format == host_cap.pebs_format) + continue; + + r = _vcpu_set_msr(vcpu, MSR_IA32_PERF_CAPABILITIES, val.capabilities); + TEST_ASSERT(!r, "Bad PEBS FMT = 0x%x didn't fail, host = 0x%x", + val.pebs_format, host_cap.pebs_format); + } + kvm_vm_free(vm); } |