diff options
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c index 58d2e17c7304..8cec5c8aca8a 100644 --- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c +++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c @@ -54,6 +54,21 @@ #define AMD_ZEN_BR_RETIRED EVENT(0xc2, 0) + +/* + * "Retired instructions", from Processor Programming Reference + * (PPR) for AMD Family 17h Model 01h, Revision B1 Processors, + * Preliminary Processor Programming Reference (PPR) for AMD Family + * 17h Model 31h, Revision B0 Processors, and Preliminary Processor + * Programming Reference (PPR) for AMD Family 19h Model 01h, Revision + * B1 Processors Volume 1 of 2. + * --- and --- + * "Instructions retired", from the Intel SDM, volume 3, + * "Pre-defined Architectural Performance Events." + */ + +#define INST_RETIRED EVENT(0xc0, 0) + /* * This event list comprises Intel's eight architectural events plus * AMD's "retired branch instructions" for Zen[123] (and possibly @@ -61,7 +76,7 @@ */ static const uint64_t event_list[] = { EVENT(0x3c, 0), - EVENT(0xc0, 0), + INST_RETIRED, EVENT(0x3c, 1), EVENT(0x2e, 0x4f), EVENT(0x2e, 0x41), @@ -76,6 +91,7 @@ struct { uint64_t stores; uint64_t loads_stores; uint64_t branches_retired; + uint64_t instructions_retired; } pmc_results; /* @@ -110,10 +126,12 @@ static void check_msr(uint32_t msr, uint64_t bits_to_flip) static void run_and_measure_loop(uint32_t msr_base) { const uint64_t branches_retired = rdmsr(msr_base + 0); + const uint64_t insn_retired = rdmsr(msr_base + 1); __asm__ __volatile__("loop ." : "+c"((int){NUM_BRANCHES})); pmc_results.branches_retired = rdmsr(msr_base + 0) - branches_retired; + pmc_results.instructions_retired = rdmsr(msr_base + 1) - insn_retired; } static void intel_guest_code(void) @@ -127,7 +145,9 @@ static void intel_guest_code(void) wrmsr(MSR_CORE_PERF_GLOBAL_CTRL, 0); wrmsr(MSR_P6_EVNTSEL0, ARCH_PERFMON_EVENTSEL_ENABLE | ARCH_PERFMON_EVENTSEL_OS | INTEL_BR_RETIRED); - wrmsr(MSR_CORE_PERF_GLOBAL_CTRL, 0x1); + wrmsr(MSR_P6_EVNTSEL1, ARCH_PERFMON_EVENTSEL_ENABLE | + ARCH_PERFMON_EVENTSEL_OS | INST_RETIRED); + wrmsr(MSR_CORE_PERF_GLOBAL_CTRL, 0x3); run_and_measure_loop(MSR_IA32_PMC0); GUEST_SYNC(0); @@ -149,6 +169,8 @@ static void amd_guest_code(void) wrmsr(MSR_K7_EVNTSEL0, 0); wrmsr(MSR_K7_EVNTSEL0, ARCH_PERFMON_EVENTSEL_ENABLE | ARCH_PERFMON_EVENTSEL_OS | AMD_ZEN_BR_RETIRED); + wrmsr(MSR_K7_EVNTSEL1, ARCH_PERFMON_EVENTSEL_ENABLE | + ARCH_PERFMON_EVENTSEL_OS | INST_RETIRED); run_and_measure_loop(MSR_K7_PERFCTR0); GUEST_SYNC(0); @@ -263,20 +285,26 @@ static struct kvm_pmu_event_filter *remove_event(struct kvm_pmu_event_filter *f, #define ASSERT_PMC_COUNTING_INSTRUCTIONS() \ do { \ uint64_t br = pmc_results.branches_retired; \ + uint64_t ir = pmc_results.instructions_retired; \ \ if (br && br != NUM_BRANCHES) \ pr_info("%s: Branch instructions retired = %lu (expected %u)\n", \ __func__, br, NUM_BRANCHES); \ TEST_ASSERT(br, "%s: Branch instructions retired = %lu (expected > 0)", \ __func__, br); \ + TEST_ASSERT(ir, "%s: Instructions retired = %lu (expected > 0)", \ + __func__, ir); \ } while (0) #define ASSERT_PMC_NOT_COUNTING_INSTRUCTIONS() \ do { \ uint64_t br = pmc_results.branches_retired; \ + uint64_t ir = pmc_results.instructions_retired; \ \ TEST_ASSERT(!br, "%s: Branch instructions retired = %lu (expected 0)", \ __func__, br); \ + TEST_ASSERT(!ir, "%s: Instructions retired = %lu (expected 0)", \ + __func__, ir); \ } while (0) static void test_without_filter(struct kvm_vcpu *vcpu) @@ -329,6 +357,7 @@ static void test_not_member_deny_list(struct kvm_vcpu *vcpu) { struct kvm_pmu_event_filter *f = event_filter(KVM_PMU_EVENT_DENY); + remove_event(f, INST_RETIRED); remove_event(f, INTEL_BR_RETIRED); remove_event(f, AMD_ZEN_BR_RETIRED); test_with_filter(vcpu, f); @@ -341,6 +370,7 @@ static void test_not_member_allow_list(struct kvm_vcpu *vcpu) { struct kvm_pmu_event_filter *f = event_filter(KVM_PMU_EVENT_ALLOW); + remove_event(f, INST_RETIRED); remove_event(f, INTEL_BR_RETIRED); remove_event(f, AMD_ZEN_BR_RETIRED); test_with_filter(vcpu, f); |