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iommufd/selftest: Add coverage for reporting max_pasid_log2 via IOMMU_HW_INFO

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IOMMU_HW_INFO is extended to report max_pasid_log2, hence add coverage
for it.

Link: https://patch.msgid.link/r/20250321180143.8468-6-yi.l.liu@intel.com
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Yi Liu 2025-03-21 11:01:43 -07:00 committed by Jason Gunthorpe
parent 803f97298e
commit 6d9500bb1f
3 changed files with 33 additions and 5 deletions
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18
tools/testing/selftests/iommu/iommufd.c
View File

@ -342,12 +342,14 @@ FIXTURE(iommufd_ioas)
uint32_t hwpt_id;
uint32_t device_id;
uint64_t base_iova;
uint32_t device_pasid_id;
};
FIXTURE_VARIANT(iommufd_ioas)
{
unsigned int mock_domains;
unsigned int memory_limit;
bool pasid_capable;
};
FIXTURE_SETUP(iommufd_ioas)
@ -372,6 +374,12 @@ FIXTURE_SETUP(iommufd_ioas)
IOMMU_TEST_DEV_CACHE_DEFAULT);
self->base_iova = MOCK_APERTURE_START;
}
if (variant->pasid_capable)
test_cmd_mock_domain_flags(self->ioas_id,
MOCK_FLAGS_DEVICE_PASID,
NULL, NULL,
&self->device_pasid_id);
}
FIXTURE_TEARDOWN(iommufd_ioas)
@ -387,6 +395,7 @@ FIXTURE_VARIANT_ADD(iommufd_ioas, no_domain)
FIXTURE_VARIANT_ADD(iommufd_ioas, mock_domain)
{
.mock_domains = 1,
.pasid_capable = true,
};
FIXTURE_VARIANT_ADD(iommufd_ioas, two_mock_domain)
@ -752,6 +761,8 @@ TEST_F(iommufd_ioas, get_hw_info)
} buffer_smaller;
if (self->device_id) {
uint8_t max_pasid = 0;
/* Provide a zero-size user_buffer */
test_cmd_get_hw_info(self->device_id, NULL, 0);
/* Provide a user_buffer with exact size */
@ -766,6 +777,13 @@ TEST_F(iommufd_ioas, get_hw_info)
* the fields within the size range still gets updated.
*/
test_cmd_get_hw_info(self->device_id, &buffer_smaller, sizeof(buffer_smaller));
test_cmd_get_hw_info_pasid(self->device_id, &max_pasid);
ASSERT_EQ(0, max_pasid);
if (variant->pasid_capable) {
test_cmd_get_hw_info_pasid(self->device_pasid_id,
&max_pasid);
ASSERT_EQ(MOCK_PASID_WIDTH, max_pasid);
}
} else {
test_err_get_hw_info(ENOENT, self->device_id,
&buffer_exact, sizeof(buffer_exact));

3
tools/testing/selftests/iommu/iommufd_fail_nth.c
View File

@ -666,7 +666,8 @@ TEST_FAIL_NTH(basic_fail_nth, device)
&self->stdev_id, NULL, &idev_id))
return -1;
if (_test_cmd_get_hw_info(self->fd, idev_id, &info, sizeof(info), NULL))
if (_test_cmd_get_hw_info(self->fd, idev_id, &info,
sizeof(info), NULL, NULL))
return -1;
if (_test_cmd_hwpt_alloc(self->fd, idev_id, ioas_id, 0,

17
tools/testing/selftests/iommu/iommufd_utils.h
View File

@ -758,7 +758,8 @@ static void teardown_iommufd(int fd, struct __test_metadata *_metadata)
/* @data can be NULL */
static int _test_cmd_get_hw_info(int fd, __u32 device_id, void *data,
size_t data_len, uint32_t *capabilities)
size_t data_len, uint32_t *capabilities,
uint8_t *max_pasid)
{
struct iommu_test_hw_info *info = (struct iommu_test_hw_info *)data;
struct iommu_hw_info cmd = {
@ -803,6 +804,9 @@ static int _test_cmd_get_hw_info(int fd, __u32 device_id, void *data,
assert(!info->flags);
}
if (max_pasid)
*max_pasid = cmd.out_max_pasid_log2;
if (capabilities)
*capabilities = cmd.out_capabilities;
@ -811,14 +815,19 @@ static int _test_cmd_get_hw_info(int fd, __u32 device_id, void *data,
#define test_cmd_get_hw_info(device_id, data, data_len) \
ASSERT_EQ(0, _test_cmd_get_hw_info(self->fd, device_id, data, \
data_len, NULL))
data_len, NULL, NULL))
#define test_err_get_hw_info(_errno, device_id, data, data_len) \
EXPECT_ERRNO(_errno, _test_cmd_get_hw_info(self->fd, device_id, data, \
data_len, NULL))
data_len, NULL, NULL))
#define test_cmd_get_hw_capabilities(device_id, caps, mask) \
ASSERT_EQ(0, _test_cmd_get_hw_info(self->fd, device_id, NULL, 0, &caps))
ASSERT_EQ(0, _test_cmd_get_hw_info(self->fd, device_id, NULL, \
0, &caps, NULL))
#define test_cmd_get_hw_info_pasid(device_id, max_pasid) \
ASSERT_EQ(0, _test_cmd_get_hw_info(self->fd, device_id, NULL, \
0, NULL, max_pasid))
static int _test_ioctl_fault_alloc(int fd, __u32 *fault_id, __u32 *fault_fd)
{