[PATCH v7 15/19] KVM: selftests: Add a helper to query if the PMU module param is enabled

Sean Christopherson
2023-11-08T00:32:10Z

Add a helper to problem KVM's "enable_pmu" param, open coding strings in
multiple places is just asking for a false negatives and/or runtime errors
due to typos.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
tools/testing/selftests/kvm/include/x86_64/processor.h | 5 +++++
tools/testing/selftests/kvm/x86_64/pmu_counters_test.c | 2 +-
tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c | 2 +-
tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c | 2 +-
4 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
index 64aecb3dcf60..c261e0941dfe 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -1216,6 +1216,11 @@ static inline uint8_t xsetbv_safe(uint32_t index, uint64_t value)

bool kvm_is_tdp_enabled(void);

+static inline bool kvm_is_pmu_enabled(void)
+{
+ return get_kvm_param_bool("enable_pmu");
+}
+
uint64_t *__vm_get_page_table_entry(struct kvm_vm *vm, uint64_t vaddr,
int *level);
uint64_t *vm_get_page_table_entry(struct kvm_vm *vm, uint64_t vaddr);
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 90381382c51f..d775cc7e8fab 100644
--- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
@@ -537,7 +537,7 @@ static void test_intel_counters(void)

int main(int argc, char *argv[])
{
- TEST_REQUIRE(get_kvm_param_bool("enable_pmu"));
+ TEST_REQUIRE(kvm_is_pmu_enabled());

TEST_REQUIRE(host_cpu_is_intel);
TEST_REQUIRE(kvm_cpu_has_p(X86_PROPERTY_PMU_VERSION));
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 7ec9fbed92e0..fa407e2ccb2f 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
@@ -867,7 +867,7 @@ int main(int argc, char *argv[])
struct kvm_vcpu *vcpu, *vcpu2 = NULL;
struct kvm_vm *vm;

- TEST_REQUIRE(get_kvm_param_bool("enable_pmu"));
+ TEST_REQUIRE(kvm_is_pmu_enabled());
TEST_REQUIRE(kvm_has_cap(KVM_CAP_PMU_EVENT_FILTER));
TEST_REQUIRE(kvm_has_cap(KVM_CAP_PMU_EVENT_MASKED_EVENTS));

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 ebbcb0a3f743..562b0152a122 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
@@ -237,7 +237,7 @@ int main(int argc, char *argv[])
{
union perf_capabilities host_cap;

- TEST_REQUIRE(get_kvm_param_bool("enable_pmu"));
+ TEST_REQUIRE(kvm_is_pmu_enabled());
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_PDCM));

TEST_REQUIRE(kvm_cpu_has_p(X86_PROPERTY_PMU_VERSION));
--
2.42.0.869.gea05f2083d-goog