From: Jinrong Liang <[email protected]>
Add AMD test case to check if non-existent counters can be accessed
in guest. Nor will KVM emulate more counters than it can support.
Signed-off-by: Jinrong Liang <[email protected]>
---
.../selftests/kvm/x86_64/pmu_counters_test.c | 59 +++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
index 3c4081a508b0..b1502a446a55 100644
--- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
@@ -761,6 +761,64 @@ static void test_amd_zen_events(void)
kvm_vm_free(vm);
}
+static void guest_wr_rd_amd_counters(uint32_t pmc_msr, bool expect_gp,
+ uint64_t test_val)
+{
+ uint8_t vector;
+ uint64_t val;
+
+ vector = wrmsr_safe(pmc_msr, test_val);
+ GUEST_ASSERT_PMC_MSR_ACCESS(WRMSR, pmc_msr, expect_gp, vector);
+
+ vector = rdmsr_safe(pmc_msr, &val);
+ GUEST_ASSERT_PMC_MSR_ACCESS(RDMSR, pmc_msr, expect_gp, vector);
+
+ if (!expect_gp)
+ GUEST_ASSERT_EQ(val, test_val);
+}
+
+static void guest_test_amd_counters_num(void)
+{
+ uint8_t i, flag, nr_amd_counters;
+ uint64_t ctrl_msr;
+ uint32_t pmc_msr;
+ bool expect_gp;
+
+ set_amd_counters(&nr_amd_counters, &ctrl_msr, &pmc_msr, &flag);
+
+ for (i = 0; i < nr_amd_counters * flag; i++) {
+ expect_gp = i >= nr_amd_counters;
+
+ guest_wr_rd_amd_counters(pmc_msr + i * flag, expect_gp, 0xffff);
+ guest_wr_rd_amd_counters(ctrl_msr + i * flag, expect_gp, 0);
+ }
+
+ GUEST_DONE();
+}
+
+static void test_amd_counters_num(void)
+{
+ bool kvm_pmu_is_perfmonv2 = kvm_cpu_has(X86_FEATURE_PERFMON_V2);
+ unsigned int i, nr_test = 1;
+ struct kvm_vcpu *vcpu;
+ struct kvm_vm *vm;
+
+ if (kvm_pmu_is_perfmonv2)
+ nr_test = AMD64_NR_COUNTERS_CORE;
+
+ for (i = 0; i <= nr_test; i++) {
+ vm = pmu_vm_create_with_one_vcpu(&vcpu,
+ guest_test_amd_counters_num);
+
+ if (kvm_pmu_is_perfmonv2)
+ vcpu_set_cpuid_property(vcpu,
+ X86_PROPERTY_PMU_NR_CORE_COUNTERS, i);
+
+ run_vcpu(vcpu);
+ kvm_vm_free(vm);
+ }
+}
+
int main(int argc, char *argv[])
{
TEST_REQUIRE(kvm_is_pmu_enabled());
@@ -777,6 +835,7 @@ int main(int argc, char *argv[])
test_intel_counters();
} else if (host_cpu_is_amd) {
test_amd_zen_events();
+ test_amd_counters_num();
} else {
TEST_FAIL("Unknown CPU vendor");
}
--
2.39.3