[PATCH v6 16/25] iommu: Allow an input type in hw_info op

[Baolu Lu]

On 6/14/2025 3:14 PM, Nicolin Chen wrote:
> The hw_info uAPI will support a bidirectional data_type field that can be
> used as an input field for user space to request for a specific info data.
> 
> To prepare for the uAPI update, change the iommu layer first:
>   - Add a new IOMMU_HW_INFO_TYPE_DEFAULT as an input, for which driver can
>     output its only (or firstly) supported type
>   - Update the kdoc accordingly
>   - Roll out the type validation in the existing drivers
> 
> Reviewed-by: Kevin Tian<kevin.tian at intel.com>
> Reviewed-by: Jason Gunthorpe<jgg at nvidia.com>
> Signed-off-by: Nicolin Chen<nicolinc at nvidia.com>

Reviewed-by: Lu Baolu <baolu.lu at linux.intel.com>