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iommufd/selftest: Add coverage for IOPF test

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Extend the selftest tool to add coverage of testing IOPF handling. This
would include the following tests:

- Allocating and destroying an iommufd fault object.
- Allocating and destroying an IOPF-capable HWPT.
- Attaching/detaching/replacing an IOPF-capable HWPT on a device.
- Triggering an IOPF on the mock device.
- Retrieving and responding to the IOPF through the file interface.

Link: https://lore.kernel.org/r/20240702063444.105814-11-baolu.lu@linux.intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Lu Baolu 2024-07-02 14:34:44 +08:00 committed by Jason Gunthorpe
parent ddee199710
commit d1211768b6
3 changed files with 104 additions and 6 deletions
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22
tools/testing/selftests/iommu/iommufd.c
View File

@ -279,6 +279,9 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested)
uint32_t parent_hwpt_id = 0;
uint32_t parent_hwpt_id_not_work = 0;
uint32_t test_hwpt_id = 0;
uint32_t iopf_hwpt_id;
uint32_t fault_id;
uint32_t fault_fd;
if (self->device_id) {
/* Negative tests */
@ -326,6 +329,7 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested)
sizeof(data));
/* Allocate two nested hwpts sharing one common parent hwpt */
test_ioctl_fault_alloc(&fault_id, &fault_fd);
test_cmd_hwpt_alloc_nested(self->device_id, parent_hwpt_id, 0,
&nested_hwpt_id[0],
IOMMU_HWPT_DATA_SELFTEST, &data,
@ -334,6 +338,14 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested)
&nested_hwpt_id[1],
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
test_err_hwpt_alloc_iopf(ENOENT, self->device_id, parent_hwpt_id,
UINT32_MAX, IOMMU_HWPT_FAULT_ID_VALID,
&iopf_hwpt_id, IOMMU_HWPT_DATA_SELFTEST,
&data, sizeof(data));
test_cmd_hwpt_alloc_iopf(self->device_id, parent_hwpt_id, fault_id,
IOMMU_HWPT_FAULT_ID_VALID, &iopf_hwpt_id,
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
test_cmd_hwpt_check_iotlb_all(nested_hwpt_id[0],
IOMMU_TEST_IOTLB_DEFAULT);
test_cmd_hwpt_check_iotlb_all(nested_hwpt_id[1],
@ -504,14 +516,24 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested)
_test_ioctl_destroy(self->fd, nested_hwpt_id[1]));
test_ioctl_destroy(nested_hwpt_id[0]);
/* Switch from nested_hwpt_id[1] to iopf_hwpt_id */
test_cmd_mock_domain_replace(self->stdev_id, iopf_hwpt_id);
EXPECT_ERRNO(EBUSY,
_test_ioctl_destroy(self->fd, iopf_hwpt_id));
/* Trigger an IOPF on the device */
test_cmd_trigger_iopf(self->device_id, fault_fd);
/* Detach from nested_hwpt_id[1] and destroy it */
test_cmd_mock_domain_replace(self->stdev_id, parent_hwpt_id);
test_ioctl_destroy(nested_hwpt_id[1]);
test_ioctl_destroy(iopf_hwpt_id);
/* Detach from the parent hw_pagetable and destroy it */
test_cmd_mock_domain_replace(self->stdev_id, self->ioas_id);
test_ioctl_destroy(parent_hwpt_id);
test_ioctl_destroy(parent_hwpt_id_not_work);
close(fault_fd);
test_ioctl_destroy(fault_id);
} else {
test_err_hwpt_alloc(ENOENT, self->device_id, self->ioas_id, 0,
&parent_hwpt_id);

2
tools/testing/selftests/iommu/iommufd_fail_nth.c
View File

@ -615,7 +615,7 @@ TEST_FAIL_NTH(basic_fail_nth, device)
if (_test_cmd_get_hw_info(self->fd, idev_id, &info, sizeof(info), NULL))
return -1;
if (_test_cmd_hwpt_alloc(self->fd, idev_id, ioas_id, 0, &hwpt_id,
if (_test_cmd_hwpt_alloc(self->fd, idev_id, ioas_id, 0, 0, &hwpt_id,
IOMMU_HWPT_DATA_NONE, 0, 0))
return -1;

86
tools/testing/selftests/iommu/iommufd_utils.h
View File

@ -153,7 +153,7 @@ static int _test_cmd_mock_domain_replace(int fd, __u32 stdev_id, __u32 pt_id,
EXPECT_ERRNO(_errno, _test_cmd_mock_domain_replace(self->fd, stdev_id, \
pt_id, NULL))
static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id,
static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id, __u32 ft_id,
__u32 flags, __u32 *hwpt_id, __u32 data_type,
void *data, size_t data_len)
{
@ -165,6 +165,7 @@ static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id,
.data_type = data_type,
.data_len = data_len,
.data_uptr = (uint64_t)data,
.fault_id = ft_id,
};
int ret;
@ -177,24 +178,36 @@ static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id,
}
#define test_cmd_hwpt_alloc(device_id, pt_id, flags, hwpt_id) \
ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, flags, \
ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, 0, flags, \
hwpt_id, IOMMU_HWPT_DATA_NONE, NULL, \
0))
#define test_err_hwpt_alloc(_errno, device_id, pt_id, flags, hwpt_id) \
EXPECT_ERRNO(_errno, _test_cmd_hwpt_alloc( \
self->fd, device_id, pt_id, flags, \
self->fd, device_id, pt_id, 0, flags, \
hwpt_id, IOMMU_HWPT_DATA_NONE, NULL, 0))
#define test_cmd_hwpt_alloc_nested(device_id, pt_id, flags, hwpt_id, \
data_type, data, data_len) \
ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, flags, \
ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, 0, flags, \
hwpt_id, data_type, data, data_len))
#define test_err_hwpt_alloc_nested(_errno, device_id, pt_id, flags, hwpt_id, \
data_type, data, data_len) \
EXPECT_ERRNO(_errno, \
_test_cmd_hwpt_alloc(self->fd, device_id, pt_id, flags, \
_test_cmd_hwpt_alloc(self->fd, device_id, pt_id, 0, flags, \
hwpt_id, data_type, data, data_len))
#define test_cmd_hwpt_alloc_iopf(device_id, pt_id, fault_id, flags, hwpt_id, \
data_type, data, data_len) \
ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, fault_id, \
flags, hwpt_id, data_type, data, \
data_len))
#define test_err_hwpt_alloc_iopf(_errno, device_id, pt_id, fault_id, flags, \
hwpt_id, data_type, data, data_len) \
EXPECT_ERRNO(_errno, \
_test_cmd_hwpt_alloc(self->fd, device_id, pt_id, fault_id, \
flags, hwpt_id, data_type, data, \
data_len))
#define test_cmd_hwpt_check_iotlb(hwpt_id, iotlb_id, expected) \
({ \
struct iommu_test_cmd test_cmd = { \
@ -684,3 +697,66 @@ static int _test_cmd_get_hw_info(int fd, __u32 device_id, void *data,
#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))
static int _test_ioctl_fault_alloc(int fd, __u32 *fault_id, __u32 *fault_fd)
{
struct iommu_fault_alloc cmd = {
.size = sizeof(cmd),
};
int ret;
ret = ioctl(fd, IOMMU_FAULT_QUEUE_ALLOC, &cmd);
if (ret)
return ret;
*fault_id = cmd.out_fault_id;
*fault_fd = cmd.out_fault_fd;
return 0;
}
#define test_ioctl_fault_alloc(fault_id, fault_fd) \
({ \
ASSERT_EQ(0, _test_ioctl_fault_alloc(self->fd, fault_id, \
fault_fd)); \
ASSERT_NE(0, *(fault_id)); \
ASSERT_NE(0, *(fault_fd)); \
})
static int _test_cmd_trigger_iopf(int fd, __u32 device_id, __u32 fault_fd)
{
struct iommu_test_cmd trigger_iopf_cmd = {
.size = sizeof(trigger_iopf_cmd),
.op = IOMMU_TEST_OP_TRIGGER_IOPF,
.trigger_iopf = {
.dev_id = device_id,
.pasid = 0x1,
.grpid = 0x2,
.perm = IOMMU_PGFAULT_PERM_READ | IOMMU_PGFAULT_PERM_WRITE,
.addr = 0xdeadbeaf,
},
};
struct iommu_hwpt_page_response response = {
.code = IOMMUFD_PAGE_RESP_SUCCESS,
};
struct iommu_hwpt_pgfault fault = {};
ssize_t bytes;
int ret;
ret = ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_TRIGGER_IOPF), &trigger_iopf_cmd);
if (ret)
return ret;
bytes = read(fault_fd, &fault, sizeof(fault));
if (bytes <= 0)
return -EIO;
response.cookie = fault.cookie;
bytes = write(fault_fd, &response, sizeof(response));
if (bytes <= 0)
return -EIO;
return 0;
}
#define test_cmd_trigger_iopf(device_id, fault_fd) \
ASSERT_EQ(0, _test_cmd_trigger_iopf(self->fd, device_id, fault_fd))