[PATCH v9 22/29] iommufd/selftest: Update hw_info coverage for an input data_type

[Pranjal Shrivastava]

On Wed, Jul 09, 2025 at 10:59:14PM -0700, Nicolin Chen wrote:
> Test both IOMMU_HW_INFO_TYPE_DEFAULT and IOMMU_HW_INFO_TYPE_SELFTEST, and
> add a negative test for an unsupported type.
> 
> Also drop the unused mask in test_cmd_get_hw_capabilities() as checkpatch
> is complaining.
> 
> Signed-off-by: Nicolin Chen <nicolinc at nvidia.com>

Reviewed-by: Pranjal Shrivastava <praan at google.com>

Note: I see a couple of warnings while building the selftests on Jason's
tree, but these seem unrelated to this series:

make -C tools/testing/selftests TARGETS=iommu
make: Entering directory '/usr/local/google/home/praan/master/iommufd/iommufd/tools/testing/selftests'
  CC       iommufd
In file included from iommufd.c:12:
In function ‘_test_ioctl_ioas_map_file’,
    inlined from ‘iommufd_mock_domain_all_aligns’ at iommufd.c:1789:5,
    inlined from ‘wrapper_iommufd_mock_domain_all_aligns’ at iommufd.c:1757:1:
iommufd_utils.h:679:36: warning: ‘mfd’ may be used uninitialized [-Wmaybe-uninitialized]
  679 |         struct iommu_ioas_map_file cmd = {
      |                                    ^~~
iommufd.c: In function ‘wrapper_iommufd_mock_domain_all_aligns’:
iommufd.c:1766:13: note: ‘mfd’ was declared here
 1766 |         int mfd;
      |             ^~~
In function ‘_test_ioctl_ioas_map_file’,
    inlined from ‘iommufd_mock_domain_all_aligns_copy’ at iommufd.c:1843:5,
    inlined from ‘wrapper_iommufd_mock_domain_all_aligns_copy’ at iommufd.c:1809:1:
iommufd_utils.h:679:36: warning: ‘mfd’ may be used uninitialized [-Wmaybe-uninitialized]
  679 |         struct iommu_ioas_map_file cmd = {
      |                                    ^~~
iommufd.c: In function ‘wrapper_iommufd_mock_domain_all_aligns_copy’:
iommufd.c:1818:13: note: ‘mfd’ was declared here
 1818 |         int mfd;
      |             ^~~
In file included from iommufd_utils.h:11:
In function ‘_test_cmd_get_hw_info’,
    inlined from ‘iommufd_ioas_get_hw_info’ at iommufd.c:792:3,
    inlined from ‘wrapper_iommufd_ioas_get_hw_info’ at iommufd.c:752:1:
iommufd_utils.h:812:37: warning: array subscript ‘struct iommu_test_hw_info[0]’ is partly outside array bounds of ‘struct iommu_test_hw_info_buffer_smaller[1]’ [-Warray-bounds=]
  812 |                         assert(!info->flags);
      |                                 ~~~~^~~~~~~
iommufd.c: In function ‘wrapper_iommufd_ioas_get_hw_info’:
iommufd.c:761:11: note: object ‘buffer_smaller’ of size 4
  761 |         } buffer_smaller;
      |           ^~~~~~~~~~~~~~
  CC       iommufd_fail_nth
make: Leaving directory '/usr/local/google/home/praan/master/iommufd/iommufd/tools/testing/selftests'

> ---
>  tools/testing/selftests/iommu/iommufd_utils.h | 33 +++++++++++--------
>  tools/testing/selftests/iommu/iommufd.c       | 32 +++++++++++++-----
>  .../selftests/iommu/iommufd_fail_nth.c        |  4 +--
>  3 files changed, 46 insertions(+), 23 deletions(-)
>

[...]

> -- 
> 2.43.0
> 

Thanks,
Praan