On Tue, Aug 27, 2024 at 09:59:45AM -0700, Nicolin Chen wrote: > Add a default_viommu_ops with a new op for cache invaldiation, similar to > the cache_invalidate_user op in structure iommu_domain_ops, but wider. An > IOMMU driver that allocated a nested domain with a core-managed viommu is > able to use the same viommu pointer for this cache invalidation API. > > ARM SMMUv3 for example supports IOTLB and ATC device cache invaldiations. > The IOTLB invalidation is per-VMID, held currently by a parent S2 domain. > The ATC invalidation is per device (Stream ID) that should be tranlsated > by a virtual device ID lookup table. Either case fits the viommu context. > > Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx> > --- > drivers/iommu/iommufd/iommufd_private.h | 3 +++ > drivers/iommu/iommufd/viommu.c | 3 +++ > include/linux/iommu.h | 5 +++++ > include/linux/iommufd.h | 19 +++++++++++++++++++ > 4 files changed, 30 insertions(+) It looks OK Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
