On Fri, Jan 29, 2021 at 10:09:03AM +0000, Tian, Kevin wrote: > > SVA is not doom to work with IO page fault only. If we have SVA+pin, > > we would get both sharing address and stable I/O latency. > > Isn't it like a traditional MAP_DMA API (imply pinning) plus specifying > cpu_va of the memory pool as the iova? I think their issue is the HW can't do the cpu_va trick without also involving the system IOMMU in a SVA mode It really is something that belongs under some general /dev/sva as we talked on the vfio thread Jason
