On Thu, Mar 16, 2023 at 07:25:17AM +0000, Tian, Kevin wrote: > I still doubt 'reserve' is the right interface to define. > > for DMA domain probably yes as it's static and one-off. > > but thinking louder when the same driver starts to support SIOV we > need allocating additional PASIDs on demand which is hardly to be > fit in a reservation interface. Sure, it is the same thing. It is "reserve" in the sense they are not assigned to mm structs and not used for SVA. Jason