From: Liu, Yi L yi.l.liu@intel.com Sent: Thursday, December 28, 2023 12:14 AM
In nested translation, the stage-1 page table is user-managed but cached by the IOMMU hardware, so an update on present page table entries in the stage-1 page table should be followed with a cache invalidation.
Add an IOMMU_HWPT_INVALIDATE ioctl to support such a cache invalidation. It takes hwpt_id to specify the iommu_domain, and a multi-entry array to support multiple invalidation data in one ioctl.
enum iommu_hwpt_invalidate_data_type is defined to tag the data type of the entries in the multi-entry array.
Co-developed-by: Nicolin Chen nicolinc@nvidia.com Signed-off-by: Nicolin Chen nicolinc@nvidia.com Signed-off-by: Yi Liu yi.l.liu@intel.com
Reviewed-by: Kevin Tian kevin.tian@intel.com