On Tue, Aug 27, 2024 at 09:59:46AM -0700, Nicolin Chen wrote: > With a VIOMMU object, use space can flush any IOMMU related cache that can > be directed using the viommu. It is similar to IOMMU_HWPT_INVALIDATE uAPI, > but can cover a wider range than IOTLB, such as device cache or desciprtor > cache. > > Allow hwpt_id of the iommu_hwpt_invalidate structure to carry a viommu_id, > and reuse the IOMMU_HWPT_INVALIDATE uAPI for VIOMMU invalidations. Driver > can define a different structure for VIOMMU invalidations v.s. HWPT ones. > > Update the uAPI, kdoc, and selftest case accordingly. > > Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx> > --- > drivers/iommu/iommufd/hw_pagetable.c | 32 +++++++++++++++++++------ > include/uapi/linux/iommufd.h | 9 ++++--- > tools/testing/selftests/iommu/iommufd.c | 4 ++-- > 3 files changed, 33 insertions(+), 12 deletions(-) Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
