On Mon, Jul 15, 2024 at 04:23:07PM +0800, Yi Liu wrote: > > Then the description is sort of like > > > > Replace is useful for iommufd/VFIO to provide perfect HW emulation in > > case the VM is expecting to be able to change a PASID on the fly. As > > AMD will only support PASID in VM's using nested translation where we > > don't use the set_dev_pasid API leave it disabled for now. > > Does it apply to SMMUv3 as well? IIRC. ARM SMMUv3 also has the CD table > (a.k.a PASID table) within the guest. And I think this is the major reason > for your above statement. right? It does, but it also supports replace so no need to explain why we don't enable it :) Jason
