linux-kernel - [PATCH v4 5/5] KVM: selftests: aarch64: Add invalid filter test in pmu_event_filter

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Date: Thu,  1 Feb 2024 21:56:54 -0500
From: Shaoqin Huang <shahuang@...hat.com>
To: Oliver Upton <oliver.upton@...ux.dev>,
	Marc Zyngier <maz@...nel.org>,
	kvmarm@...ts.linux.dev
Cc: Eric Auger <eauger@...hat.com>,
	Shaoqin Huang <shahuang@...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 v4 5/5] KVM: selftests: aarch64: Add invalid filter test in pmu_event_filter_test

Add the invalid filter test includes 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.

Signed-off-by: Shaoqin Huang <shahuang@...hat.com>
---
 .../kvm/aarch64/pmu_event_filter_test.c       | 36 +++++++++++++++++++
 1 file changed, 36 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 d280382f362f..68e1f2003312 100644
--- a/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
+++ b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
@@ -7,6 +7,7 @@
  * 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.
  */
@@ -183,6 +184,39 @@ static void for_each_test(void)
 		run_test(t);
 }
 
+static void set_invalid_filter(struct vpmu_vm *vm, void *arg)
+{
+	struct kvm_pmu_event_filter invalid;
+	struct kvm_device_attr attr = {
+		.group	= KVM_ARM_VCPU_PMU_V3_CTRL,
+		.attr	= KVM_ARM_VCPU_PMU_V3_FILTER,
+		.addr	= (uint64_t)&invalid,
+	};
+	int ret = 0;
+
+	/* The max event number is (1 << 16), set a range largeer than it. */
+	invalid = __DEFINE_FILTER(BIT(15), BIT(15)+1, 0);
+	ret = __vcpu_ioctl(vm->vcpu, KVM_SET_DEVICE_ATTR, &attr);
+	TEST_ASSERT(ret && errno == EINVAL, "Set Invalid filter range "
+		    "ret = %d, errno = %d (expected ret = -1, errno = EINVAL)",
+		    ret, errno);
+
+	ret = 0;
+
+	/* Set the Invalid action. */
+	invalid = __DEFINE_FILTER(0, 1, 3);
+	ret = __vcpu_ioctl(vm->vcpu, KVM_SET_DEVICE_ATTR, &attr);
+	TEST_ASSERT(ret && errno == EINVAL, "Set Invalid filter action "
+		    "ret = %d, errno = %d (expected ret = -1, errno = EINVAL)",
+		    ret, errno);
+}
+
+static void test_invalid_filter(void)
+{
+	vpmu_vm = __create_vpmu_vm(guest_code, set_invalid_filter, NULL);
+	destroy_vpmu_vm(vpmu_vm);
+}
+
 static bool kvm_supports_pmu_event_filter(void)
 {
 	int r;
@@ -216,4 +250,6 @@ int main(void)
 	TEST_REQUIRE(host_pmu_supports_events());
 
 	for_each_test();
+
+	test_invalid_filter();
 }
-- 
2.40.1