Rework the LBR format test to use the bitfield instead of a separate
mask macro, mainly so that adding a nearly-identical PEBS format test
doesn't have to copy-paste-tweak the macro too.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
.../selftests/kvm/x86_64/vmx_pmu_caps_test.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 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 6733d879a00b..38aec88d733b 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
@@ -19,8 +19,6 @@
#include "kvm_util.h"
#include "vmx.h"
-#define PMU_CAP_LBR_FMT 0x3f
-
union perf_capabilities {
struct {
u64 lbr_format:6;
@@ -169,7 +167,7 @@ static void test_immutable_perf_capabilities(union perf_capabilities host_cap)
struct kvm_vcpu *vcpu;
struct kvm_vm *vm = vm_create_with_one_vcpu(&vcpu, NULL);
- uint64_t val;
+ union perf_capabilities val = host_cap;
int r, bit;
for_each_set_bit(bit, &reserved_caps, 64) {
@@ -184,12 +182,13 @@ static void test_immutable_perf_capabilities(union perf_capabilities host_cap)
* KVM only supports the host's native LBR format, as well as '0' (to
* disable LBR support). Verify KVM rejects all other LBR formats.
*/
- for (val = 1; val <= PMU_CAP_LBR_FMT; val++) {
- if (val == (host_cap.capabilities & PMU_CAP_LBR_FMT))
+ for (val.lbr_format = 1; val.lbr_format; val.lbr_format++) {
+ if (val.lbr_format == host_cap.lbr_format)
continue;
- r = _vcpu_set_msr(vcpu, MSR_IA32_PERF_CAPABILITIES, val);
- TEST_ASSERT(!r, "Bad LBR FMT = 0x%lx didn't fail", val);
+ r = _vcpu_set_msr(vcpu, MSR_IA32_PERF_CAPABILITIES, val.capabilities);
+ TEST_ASSERT(!r, "Bad LBR FMT = 0x%x didn't fail, host = 0x%x",
+ val.lbr_format, host_cap.lbr_format);
}
kvm_vm_free(vm);
--
2.40.0.rc1.284.g88254d51c5-goog
