Re: [PATCH v4 2/5] iommufd/selftest: Add IOMMU_TEST_OP_ACCESS_SET_IOAS coverage

[Jason Gunthorpe]

On Wed, Mar 08, 2023 at 06:25:59AM -0800, Nicolin Chen wrote:
> Add a new IOMMU_TEST_OP_ACCESS_SET_IOAS to allow setting access->ioas
> individually, corresponding to the iommufd_access_set_ioas() helper.
> 
> Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
> Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx>
> ---
>  drivers/iommu/iommufd/iommufd_test.h          |  4 +++
>  drivers/iommu/iommufd/selftest.c              | 26 +++++++++++++++----
>  tools/testing/selftests/iommu/iommufd_utils.h | 22 ++++++++++++++--
>  3 files changed, 45 insertions(+), 7 deletions(-)

I'd prefer we keep it so that the IOAS can be setup with an argument,
this will greatly help syzkaller

Lets have it so a 0 ioas will avoid the setup so the second call can
happen

Jason