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iommufd/selftest: Add IOMMU_TEST_OP_ACCESS_REPLACE_IOAS coverage

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Add a new IOMMU_TEST_OP_ACCESS_REPLACE_IOAS to allow replacing the
access->ioas, corresponding to the iommufd_access_replace() helper.

Then add replace coverage as a part of user_copy test case, which
basically repeats the copy test after replacing the old ioas with a new
one.

Link: https://lore.kernel.org/r/a4897f93d41c34b972213243b8dbf4c3832842e4.1690523699.git.nicolinc@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Nicolin Chen 2023-07-27 23:33:28 -07:00 committed by Jason Gunthorpe
parent 70c16123d8
commit c154660b6e
4 changed files with 69 additions and 2 deletions
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4
drivers/iommu/iommufd/iommufd_test.h
View file

@ -18,6 +18,7 @@ enum {
IOMMU_TEST_OP_ACCESS_RW,
IOMMU_TEST_OP_SET_TEMP_MEMORY_LIMIT,
IOMMU_TEST_OP_MOCK_DOMAIN_REPLACE,
IOMMU_TEST_OP_ACCESS_REPLACE_IOAS,
};
enum {
@ -91,6 +92,9 @@ struct iommu_test_cmd {
struct {
__u32 limit;
} memory_limit;
struct {
__u32 ioas_id;
} access_replace_ioas;
};
__u32 last;
};

19
drivers/iommu/iommufd/selftest.c
View file

@ -785,6 +785,22 @@ static int iommufd_test_create_access(struct iommufd_ucmd *ucmd,
return rc;
}
static int iommufd_test_access_replace_ioas(struct iommufd_ucmd *ucmd,
unsigned int access_id,
unsigned int ioas_id)
{
struct selftest_access *staccess;
int rc;
staccess = iommufd_access_get(access_id);
if (IS_ERR(staccess))
return PTR_ERR(staccess);
rc = iommufd_access_replace(staccess->access, ioas_id);
fput(staccess->file);
return rc;
}
/* Check that the pages in a page array match the pages in the user VA */
static int iommufd_test_check_pages(void __user *uptr, struct page **pages,
size_t npages)
@ -1000,6 +1016,9 @@ int iommufd_test(struct iommufd_ucmd *ucmd)
case IOMMU_TEST_OP_CREATE_ACCESS:
return iommufd_test_create_access(ucmd, cmd->id,
cmd->create_access.flags);
case IOMMU_TEST_OP_ACCESS_REPLACE_IOAS:
return iommufd_test_access_replace_ioas(
ucmd, cmd->id, cmd->access_replace_ioas.ioas_id);
case IOMMU_TEST_OP_ACCESS_PAGES:
return iommufd_test_access_pages(
ucmd, cmd->id, cmd->access_pages.iova,

29
tools/testing/selftests/iommu/iommufd.c
View file

@ -1283,7 +1283,13 @@ TEST_F(iommufd_mock_domain, user_copy)
.dst_iova = MOCK_APERTURE_START,
.length = BUFFER_SIZE,
};
unsigned int ioas_id;
struct iommu_ioas_unmap unmap_cmd = {
.size = sizeof(unmap_cmd),
.ioas_id = self->ioas_id,
.iova = MOCK_APERTURE_START,
.length = BUFFER_SIZE,
};
unsigned int new_ioas_id, ioas_id;
/* Pin the pages in an IOAS with no domains then copy to an IOAS with domains */
test_ioctl_ioas_alloc(&ioas_id);
@ -1301,11 +1307,30 @@ TEST_F(iommufd_mock_domain, user_copy)
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, &copy_cmd));
check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE);
/* Now replace the ioas with a new one */
test_ioctl_ioas_alloc(&new_ioas_id);
test_ioctl_ioas_map_id(new_ioas_id, buffer, BUFFER_SIZE,
&copy_cmd.src_iova);
test_cmd_access_replace_ioas(access_cmd.id, new_ioas_id);
/* Destroy the old ioas and cleanup copied mapping */
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_UNMAP, &unmap_cmd));
test_ioctl_destroy(ioas_id);
/* Then run the same test again with the new ioas */
access_cmd.access_pages.iova = copy_cmd.src_iova;
ASSERT_EQ(0,
ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES),
&access_cmd));
copy_cmd.src_ioas_id = new_ioas_id;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, &copy_cmd));
check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE);
test_cmd_destroy_access_pages(
access_cmd.id, access_cmd.access_pages.out_access_pages_id);
test_cmd_destroy_access(access_cmd.id);
test_ioctl_destroy(ioas_id);
test_ioctl_destroy(new_ioas_id);
}
TEST_F(iommufd_mock_domain, replace)

19
tools/testing/selftests/iommu/iommufd_utils.h
View file

@ -119,6 +119,25 @@ static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id,
#define test_cmd_hwpt_alloc(device_id, pt_id, hwpt_id) \
ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, hwpt_id))
static int _test_cmd_access_replace_ioas(int fd, __u32 access_id,
unsigned int ioas_id)
{
struct iommu_test_cmd cmd = {
.size = sizeof(cmd),
.op = IOMMU_TEST_OP_ACCESS_REPLACE_IOAS,
.id = access_id,
.access_replace_ioas = { .ioas_id = ioas_id },
};
int ret;
ret = ioctl(fd, IOMMU_TEST_CMD, &cmd);
if (ret)
return ret;
return 0;
}
#define test_cmd_access_replace_ioas(access_id, ioas_id) \
ASSERT_EQ(0, _test_cmd_access_replace_ioas(self->fd, access_id, ioas_id))
static int _test_cmd_create_access(int fd, unsigned int ioas_id,
__u32 *access_id, unsigned int flags)
{