On Tue, Nov 03, 2020 at 08:56:43AM -0400, Jason Gunthorpe wrote: > On Tue, Nov 03, 2020 at 10:52:09AM +0100, joro@xxxxxxxxxx wrote: > > So having said this, what is the benefit of exposing those SVA internals > > to user-space? > > Only the device use of the PASID is device specific, the actual PASID > and everything on the IOMMU side is generic. > > There is enough API there it doesn't make sense to duplicate it into > every single SVA driver. What generic things have to be done by the drivers besides allocating/deallocating PASIDs and binding an address space to it? Is there anything which isn't better handled in a kernel-internal library which drivers just use? Regards, Joerg
