30 May
2025
30 May
'25
4:52 p.m.
On Sat, May 17, 2025 at 08:21:37PM -0700, 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
Signed-off-by: Nicolin Chen nicolinc@nvidia.com
include/linux/iommu.h | 6 ++++-- include/uapi/linux/iommufd.h | 4 +++- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 4 ++++ drivers/iommu/intel/iommu.c | 4 ++++ drivers/iommu/iommufd/device.c | 3 +++ drivers/iommu/iommufd/selftest.c | 4 ++++ 6 files changed, 22 insertions(+), 3 deletions(-)
Reviewed-by: Jason Gunthorpe jgg@nvidia.com
Jason