Commit 740d087e authored by Jinrong Liang's avatar Jinrong Liang Committed by Sean Christopherson
Browse files

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: default avatarJinrong Liang <cloudliang@tencent.com>
Link: https://lore.kernel.org/r/20230810090945.16053-7-cloudliang@tencent.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent d4e36166

tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c

+27 −0
Original line number Diff line number Diff line
@@ -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)));

	}

}