On Fri, Dec 13, 2024 at 07:52:40AM +0000, Tian, Kevin wrote: > I'm not sure where that requirement comes from. Does AMD require RID > and PASID to use the same format when nesting is disabled? If yes, that's > still a driver burden to handle, not iommufd's... Yes, ARM and AMD require this too The point of the iommufd enforcement of ALLOC_PAGING is to try to discourage bad apps - ie apps that only work on Intel. We can check the rid attach too if it is easy to do Jason
