On Tue, May 31, 2022 at 10:29:55AM -0700, Jacob Pan wrote: > The reason why I store PASID at IOMMU domain is for IOTLB flush within the > domain. Device driver is not aware of domain level IOTLB flush. We also > have iova_cookie for each domain which essentially is for RIDPASID. You need to make the PASID stuff work generically. The domain needs to hold a list of all the places it needs to flush and that list needs to be maintained during attach/detach. A single PASID on the domain is obviously never going to work generically. Jason
