Hi Shaoqin
On 11/29/23 08:27, Shaoqin Huang wrote:
> Add the invalid filter test to double check if the KVM_ARM_VCPU_PMU_V3_FILTER
> will return the expected error.
... in which situations? filter beyond the 16b event space or incorrect
action.
>
> Signed-off-by: Shaoqin Huang <shahuang@xxxxxxxxxx>
> ---
> .../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 0e652fbdb37a..4c375417b194 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.
> */
> @@ -197,6 +198,39 @@ 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 large than it. */
larger
> + invalid = __DEFINE_FILTER(BIT(15), BIT(15)+1, 0);
doc says
must fit within the event space defined by the PMU
architecture (10 bits on ARMv8.0, 16 bits from ARMv8.1 onwards).
> + 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;
> @@ -228,4 +262,6 @@ int main(void)
> TEST_REQUIRE(host_pmu_supports_events());
>
> for_each_test();
> +
> + test_invalid_filter();
> }
Eric
