[PATCH v6 6/6] KVM: selftests: Test gp event filters don't affect fixed event filters

[Jinrong Liang <ljr.kernel@gmail.com>]

From: Jinrong Liang <cloudliang@tencent.com>

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>
---
 .../kvm/x86_64/pmu_event_filter_test.c        | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)

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 732c76c41bb0..2166b4085ca3 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
@@ -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;
+	do_vcpu_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)));
 	}
 }
 
-- 
2.39.3