linux-kernel - [PATCH v8 3/3] KVM: selftests: aarch64: Add invalid filter test in pmu_event_filter

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Date: Thu,  9 May 2024 05:05:40 -0400
From: Shaoqin Huang <shahuang@...hat.com>
To: Oliver Upton <oliver.upton@...ux.dev>,
	Marc Zyngier <maz@...nel.org>,
	kvmarm@...ts.linux.dev
Cc: Shaoqin Huang <shahuang@...hat.com>,
	Eric Auger <eric.auger@...hat.com>,
	James Morse <james.morse@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Shuah Khan <shuah@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	kvm@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v8 3/3] KVM: selftests: aarch64: Add invalid filter test in pmu_event_filter_test

Add the invalid filter test which sets the filter beyond the event
space and sets the invalid action to double check if the
KVM_ARM_VCPU_PMU_V3_FILTER will return the expected error.

Reviewed-by: Eric Auger <eric.auger@...hat.com>
Signed-off-by: Shaoqin Huang <shahuang@...hat.com>
---
 .../kvm/aarch64/pmu_event_filter_test.c       | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
index fb0fde1ed436..5423ffb659ba 100644
--- a/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
+++ b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
@@ -8,6 +8,7 @@
  * This test checks if the guest only see the limited pmu event that userspace
  * sets, if the guest can use those events which user allow, and if the guest
  * can't use those events which user deny.
+ * It also checks that setting invalid filter ranges return the expected error.
  * This test runs only when KVM_CAP_ARM_PMU_V3, KVM_ARM_VCPU_PMU_V3_FILTER
  * is supported on the host.
  */
@@ -178,6 +179,41 @@ static void destroy_vpmu_vm(void)
 	kvm_vm_free(vpmu_vm.vm);
 }
 
+static void test_invalid_filter(void)
+{
+	struct kvm_pmu_event_filter invalid;
+	int ret;
+
+	pr_info("Test: test_invalid_filter\n");
+
+	memset(&vpmu_vm, 0, sizeof(vpmu_vm));
+
+	vpmu_vm.vm = vm_create(1);
+	vpmu_vm.vcpu = vm_vcpu_add_with_vpmu(vpmu_vm.vm, 0, guest_code);
+	vpmu_vm.gic_fd = vgic_v3_setup(vpmu_vm.vm, 1, 64,
+					GICD_BASE_GPA, GICR_BASE_GPA);
+	__TEST_REQUIRE(vpmu_vm.gic_fd >= 0,
+		       "Failed to create vgic-v3, skipping");
+
+	/* The max event number is (1 << 16), set a range largeer than it. */
+	invalid = __DEFINE_FILTER(BIT(15), BIT(15) + 1, 0);
+	ret = __kvm_device_attr_set(vpmu_vm.vcpu->fd, KVM_ARM_VCPU_PMU_V3_CTRL,
+				    KVM_ARM_VCPU_PMU_V3_FILTER, &invalid);
+	TEST_ASSERT(ret && errno == EINVAL, "Set Invalid filter range "
+		    "ret = %d, errno = %d (expected ret = -1, errno = EINVAL)",
+		    ret, errno);
+
+	/* Set the Invalid action. */
+	invalid = __DEFINE_FILTER(0, 1, 3);
+	ret = __kvm_device_attr_set(vpmu_vm.vcpu->fd, KVM_ARM_VCPU_PMU_V3_CTRL,
+				    KVM_ARM_VCPU_PMU_V3_FILTER, &invalid);
+	TEST_ASSERT(ret && errno == EINVAL, "Set Invalid filter action "
+		    "ret = %d, errno = %d (expected ret = -1, errno = EINVAL)",
+		    ret, errno);
+
+	destroy_vpmu_vm();
+}
+
 static void run_test(struct test_desc *t)
 {
 	pr_info("Test: %s\n", t->name);
@@ -300,4 +336,6 @@ int main(void)
 	TEST_REQUIRE(kvm_pmu_support_events());
 
 	run_tests();
+
+	test_invalid_filter();
 }
-- 
2.40.1