KVM: selftests: Test gp event filters don't affect fixed event filters

Add a test to ensure that setting both generic and fixed performance
event filters does not affect the consistency of the fixed event filter
behavior in KVM.

Signed-off-by: Jinrong Liang <cloudliang@tencent.com>
Link: https://lore.kernel.org/r/20230810090945.16053-7-cloudliang@tencent.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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 c9355ca4cd5042154eeb31847afdf15097b843ca..283cc55597a4fe28c02197ea18c269b9294a16b2 100644 (file)
--- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
@@ -838,6 +838,19 @@ static uint64_t test_with_fixed_counter_filter(struct kvm_vcpu *vcpu,
        return run_vcpu_to_sync(vcpu);
 }
 
+static uint64_t test_set_gp_and_fixed_event_filter(struct kvm_vcpu *vcpu,
+                                                  uint32_t action,
+                                                  uint32_t bitmap)
+{
+       struct __kvm_pmu_event_filter f = base_event_filter;
+
+       f.action = action;
+       f.fixed_counter_bitmap = bitmap;
+       set_pmu_event_filter(vcpu, &f);
+
+       return run_vcpu_to_sync(vcpu);
+}
+
 static void __test_fixed_counter_bitmap(struct kvm_vcpu *vcpu, uint8_t idx,
                                        uint8_t nr_fixed_counters)
 {
@@ -864,6 +877,20 @@ static void __test_fixed_counter_bitmap(struct kvm_vcpu *vcpu, uint8_t idx,
                count = test_with_fixed_counter_filter(vcpu, KVM_PMU_EVENT_DENY,
                                                       bitmap);
                TEST_ASSERT_EQ(!!count, !(bitmap & BIT(idx)));
+
+               /*
+                * Check that fixed_counter_bitmap has higher priority than
+                * events[] when both are set.
+                */
+               count = test_set_gp_and_fixed_event_filter(vcpu,
+                                                          KVM_PMU_EVENT_ALLOW,
+                                                          bitmap);
+               TEST_ASSERT_EQ(!!count, !!(bitmap & BIT(idx)));
+
+               count = test_set_gp_and_fixed_event_filter(vcpu,
+                                                          KVM_PMU_EVENT_DENY,
+                                                          bitmap);
+               TEST_ASSERT_EQ(!!count, !(bitmap & BIT(idx)));
        }
 }