f4986a72d6
Define the IOMMU_IOAS_MAP_FILE ioctl interface, which allows a user to register memory by passing a memfd plus offset and length. Implement it using the memfd_pin_folios() kAPI. Link: https://patch.msgid.link/r/1729861919-234514-8-git-send-email-steven.sistare@oracle.com Suggested-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Steve Sistare <steven.sistare@oracle.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>