> From: Liu, Yi L <yi.l.liu@xxxxxxxxx> > 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@xxxxxxxxxx> > Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx> > Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx> Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
