linux-kernel - [PATCH v4 2/6] KVM: selftests: Add helpers for PMC asserts in PMU event filter test

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Date:   Fri,  7 Apr 2023 16:32:50 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Aaron Lewis <aaronlewis@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>
Subject: [PATCH v4 2/6] KVM: selftests: Add helpers for PMC asserts in PMU
 event filter test

From: Aaron Lewis <aaronlewis@...gle.com>

Add helper macros to consolidate the asserts that a PMC is/isn't counting
(branch) instructions retired.  This will make it easier to add additional
asserts related to counting instructions later on.

No functional changes intended.

Signed-off-by: Aaron Lewis <aaronlewis@...gle.com>
[sean: add "INSTRUCTIONS", massage changelog]
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 .../kvm/x86_64/pmu_event_filter_test.c        | 52 ++++++++++---------
 1 file changed, 27 insertions(+), 25 deletions(-)

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 a00a9d6ea41e..9b53e02a0565 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
@@ -244,14 +244,27 @@ static struct kvm_pmu_event_filter *remove_event(struct kvm_pmu_event_filter *f,
 	return f;
 }
 
+#define ASSERT_PMC_COUNTING_INSTRUCTIONS(count)						\
+do {											\
+	if (count != NUM_BRANCHES)							\
+		pr_info("%s: Branch instructions retired = %lu (expected %u)\n",	\
+			__func__, count, NUM_BRANCHES);					\
+	TEST_ASSERT(count, "Allowed PMU event is not counting.");			\
+} while (0)
+
+#define ASSERT_PMC_NOT_COUNTING_INSTRUCTIONS(count)					\
+do {											\
+	if (count)									\
+		pr_info("%s: Branch instructions retired = %lu (expected 0)\n",		\
+			__func__, count);						\
+	TEST_ASSERT(!count, "Disallowed PMU Event is counting");			\
+} while (0)
+
 static void test_without_filter(struct kvm_vcpu *vcpu)
 {
 	uint64_t count = run_vcpu_to_sync(vcpu);
 
-	if (count != NUM_BRANCHES)
-		pr_info("%s: Branch instructions retired = %lu (expected %u)\n",
-			__func__, count, NUM_BRANCHES);
-	TEST_ASSERT(count, "Allowed PMU event is not counting");
+	ASSERT_PMC_COUNTING_INSTRUCTIONS(count);
 }
 
 static uint64_t test_with_filter(struct kvm_vcpu *vcpu,
@@ -269,12 +282,9 @@ static void test_amd_deny_list(struct kvm_vcpu *vcpu)
 
 	f = create_pmu_event_filter(&event, 1, KVM_PMU_EVENT_DENY, 0);
 	count = test_with_filter(vcpu, f);
-
 	free(f);
-	if (count != NUM_BRANCHES)
-		pr_info("%s: Branch instructions retired = %lu (expected %u)\n",
-			__func__, count, NUM_BRANCHES);
-	TEST_ASSERT(count, "Allowed PMU event is not counting");
+
+	ASSERT_PMC_COUNTING_INSTRUCTIONS(count);
 }
 
 static void test_member_deny_list(struct kvm_vcpu *vcpu)
@@ -283,10 +293,8 @@ static void test_member_deny_list(struct kvm_vcpu *vcpu)
 	uint64_t count = test_with_filter(vcpu, f);
 
 	free(f);
-	if (count)
-		pr_info("%s: Branch instructions retired = %lu (expected 0)\n",
-			__func__, count);
-	TEST_ASSERT(!count, "Disallowed PMU Event is counting");
+
+	ASSERT_PMC_NOT_COUNTING_INSTRUCTIONS(count);
 }
 
 static void test_member_allow_list(struct kvm_vcpu *vcpu)
@@ -295,10 +303,8 @@ static void test_member_allow_list(struct kvm_vcpu *vcpu)
 	uint64_t count = test_with_filter(vcpu, f);
 
 	free(f);
-	if (count != NUM_BRANCHES)
-		pr_info("%s: Branch instructions retired = %lu (expected %u)\n",
-			__func__, count, NUM_BRANCHES);
-	TEST_ASSERT(count, "Allowed PMU event is not counting");
+
+	ASSERT_PMC_COUNTING_INSTRUCTIONS(count);
 }
 
 static void test_not_member_deny_list(struct kvm_vcpu *vcpu)
@@ -310,10 +316,8 @@ static void test_not_member_deny_list(struct kvm_vcpu *vcpu)
 	remove_event(f, AMD_ZEN_BR_RETIRED);
 	count = test_with_filter(vcpu, f);
 	free(f);
-	if (count != NUM_BRANCHES)
-		pr_info("%s: Branch instructions retired = %lu (expected %u)\n",
-			__func__, count, NUM_BRANCHES);
-	TEST_ASSERT(count, "Allowed PMU event is not counting");
+
+	ASSERT_PMC_COUNTING_INSTRUCTIONS(count);
 }
 
 static void test_not_member_allow_list(struct kvm_vcpu *vcpu)
@@ -325,10 +329,8 @@ static void test_not_member_allow_list(struct kvm_vcpu *vcpu)
 	remove_event(f, AMD_ZEN_BR_RETIRED);
 	count = test_with_filter(vcpu, f);
 	free(f);
-	if (count)
-		pr_info("%s: Branch instructions retired = %lu (expected 0)\n",
-			__func__, count);
-	TEST_ASSERT(!count, "Disallowed PMU Event is counting");
+
+	ASSERT_PMC_NOT_COUNTING_INSTRUCTIONS(count);
 }
 
 /*
-- 
2.40.0.577.gac1e443424-goog