Re: [PATCH v2 2/6] selftests: kvm: s390: Add ucontrol flic attr selftests

[Hariharan Mari <hari55@linux.ibm.com>]

On 2024-12-16 10:21, Christoph Schlameuss wrote:
> Add some superficial selftests for the floating interrupt controller
> when using ucontrol VMs. These tests are intended to cover very basic
> calls only.
> 
> Some of the calls may trigger null pointer dereferences on kernels not
> containing the fixes in this patch series.
> 
> Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com>

Tested-by: Hariharan Mari <hari55@linux.ibm.com>
> ---
>  .../selftests/kvm/s390x/ucontrol_test.c       | 148 ++++++++++++++++++
>  1 file changed, 148 insertions(+)
> 
> diff --git a/tools/testing/selftests/kvm/s390x/ucontrol_test.c
> b/tools/testing/selftests/kvm/s390x/ucontrol_test.c
> index 0c112319dab1..b003abda8495 100644
> --- a/tools/testing/selftests/kvm/s390x/ucontrol_test.c
> +++ b/tools/testing/selftests/kvm/s390x/ucontrol_test.c
> @@ -635,4 +635,152 @@ TEST_F(uc_kvm, uc_skey)
>  	uc_assert_diag44(self);
>  }
> 
> +static char uc_flic_b[PAGE_SIZE];
> +static struct kvm_s390_io_adapter uc_flic_ioa = { .id = 0 };
> +static struct kvm_s390_io_adapter_req uc_flic_ioam = { .id = 0 };
> +static struct kvm_s390_ais_req uc_flic_asim = { .isc = 0 };
> +static struct kvm_s390_ais_all uc_flic_asima = { .simm = 0 };
> +static struct uc_flic_attr_test {
> +	char *name;
> +	struct kvm_device_attr a;
> +	int hasrc;
> +	int geterrno;
> +	int seterrno;
> +} uc_flic_attr_tests[] = {
> +	{
> +		.name = "KVM_DEV_FLIC_GET_ALL_IRQS",
> +		.seterrno = EINVAL,
> +		.a = {
> +			.group = KVM_DEV_FLIC_GET_ALL_IRQS,
> +			.addr = (u64)&uc_flic_b,
> +			.attr = PAGE_SIZE,
> +		},
> +	},
> +	{
> +		.name = "KVM_DEV_FLIC_ENQUEUE",
> +		.geterrno = EINVAL,
> +		.a = { .group = KVM_DEV_FLIC_ENQUEUE, },
> +	},
> +	{
> +		.name = "KVM_DEV_FLIC_CLEAR_IRQS",
> +		.geterrno = EINVAL,
> +		.a = { .group = KVM_DEV_FLIC_CLEAR_IRQS, },
> +	},
> +	{
> +		.name = "KVM_DEV_FLIC_ADAPTER_REGISTER",
> +		.geterrno = EINVAL,
> +		.a = {
> +			.group = KVM_DEV_FLIC_ADAPTER_REGISTER,
> +			.addr = (u64)&uc_flic_ioa,
> +		},
> +	},
> +	{
> +		.name = "KVM_DEV_FLIC_ADAPTER_MODIFY",
> +		.geterrno = EINVAL,
> +		.seterrno = EINVAL,
> +		.a = {
> +			.group = KVM_DEV_FLIC_ADAPTER_MODIFY,
> +			.addr = (u64)&uc_flic_ioam,
> +			.attr = sizeof(uc_flic_ioam),
> +		},
> +	},
> +	{
> +		.name = "KVM_DEV_FLIC_CLEAR_IO_IRQ",
> +		.geterrno = EINVAL,
> +		.seterrno = EINVAL,
> +		.a = {
> +			.group = KVM_DEV_FLIC_CLEAR_IO_IRQ,
> +			.attr = 32,
> +		},
> +	},
> +	{
> +		.name = "KVM_DEV_FLIC_AISM",
> +		.geterrno = EINVAL,
> +		.seterrno = ENOTSUP,
> +		.a = {
> +			.group = KVM_DEV_FLIC_AISM,
> +			.addr = (u64)&uc_flic_asim,
> +		},
> +	},
> +	{
> +		.name = "KVM_DEV_FLIC_AIRQ_INJECT",
> +		.geterrno = EINVAL,
> +		.a = { .group = KVM_DEV_FLIC_AIRQ_INJECT, },
> +	},
> +	{
> +		.name = "KVM_DEV_FLIC_AISM_ALL",
> +		.geterrno = ENOTSUP,
> +		.seterrno = ENOTSUP,
> +		.a = {
> +			.group = KVM_DEV_FLIC_AISM_ALL,
> +			.addr = (u64)&uc_flic_asima,
> +			.attr = sizeof(uc_flic_asima),
> +		},
> +	},
> +	{
> +		.name = "KVM_DEV_FLIC_APF_ENABLE",
> +		.geterrno = EINVAL,
> +		.seterrno = EINVAL,
> +		.a = { .group = KVM_DEV_FLIC_APF_ENABLE, },
> +	},
> +	{
> +		.name = "KVM_DEV_FLIC_APF_DISABLE_WAIT",
> +		.geterrno = EINVAL,
> +		.seterrno = EINVAL,
> +		.a = { .group = KVM_DEV_FLIC_APF_DISABLE_WAIT, },
> +	},
> +};
> +
> +TEST_F(uc_kvm, uc_flic_attrs)
> +{
> +	struct kvm_create_device cd = { .type = KVM_DEV_TYPE_FLIC };
> +	struct kvm_device_attr attr;
> +	u64 value;
> +	int rc, i;
> +
> +	rc = ioctl(self->vm_fd, KVM_CREATE_DEVICE, &cd);
> +	ASSERT_EQ(0, rc) TH_LOG("create device failed with err %s (%i)",
> +				strerror(errno), errno);
> +
> +	for (i = 0; i < ARRAY_SIZE(uc_flic_attr_tests); i++) {
> +		TH_LOG("test %s", uc_flic_attr_tests[i].name);
> +		attr = (struct kvm_device_attr) {
> +			.group = uc_flic_attr_tests[i].a.group,
> +			.attr = uc_flic_attr_tests[i].a.attr,
> +			.addr = uc_flic_attr_tests[i].a.addr,
> +		};
> +		if (attr.addr == 0)
> +			attr.addr = (u64)&value;
> +
> +		rc = ioctl(cd.fd, KVM_HAS_DEVICE_ATTR, &attr);
> +		EXPECT_EQ(uc_flic_attr_tests[i].hasrc, !!rc)
> +			TH_LOG("expected dev attr missing %s",
> +			       uc_flic_attr_tests[i].name);
> +
> +		rc = ioctl(cd.fd, KVM_GET_DEVICE_ATTR, &attr);
> +		EXPECT_EQ(!!uc_flic_attr_tests[i].geterrno, !!rc)
> +			TH_LOG("get dev attr rc not expected on %s %s (%i)",
> +			       uc_flic_attr_tests[i].name,
> +			       strerror(errno), errno);
> +		if (uc_flic_attr_tests[i].geterrno)
> +			EXPECT_EQ(uc_flic_attr_tests[i].geterrno, errno)
> +				TH_LOG("get dev attr errno not expected on %s %s (%i)",
> +				       uc_flic_attr_tests[i].name,
> +				       strerror(errno), errno);
> +
> +		rc = ioctl(cd.fd, KVM_SET_DEVICE_ATTR, &attr);
> +		EXPECT_EQ(!!uc_flic_attr_tests[i].seterrno, !!rc)
> +			TH_LOG("set sev attr rc not expected on %s %s (%i)",
> +			       uc_flic_attr_tests[i].name,
> +			       strerror(errno), errno);
> +		if (uc_flic_attr_tests[i].seterrno)
> +			EXPECT_EQ(uc_flic_attr_tests[i].seterrno, errno)
> +				TH_LOG("set dev attr errno not expected on %s %s (%i)",
> +				       uc_flic_attr_tests[i].name,
> +				       strerror(errno), errno);
> +	}
> +
> +	close(cd.fd);
> +}
> +
>  TEST_HARNESS_MAIN