On Thu, Jul 06, 2017 at 11:23:41PM +0000, Kalra, Ashish wrote: > I have a generic question on vIOMMU support, is there any proposal/plan to > add ATS/PRI extension support to vIOMMUs and allow > handling for end to end (v)IOMMU Page faults (w/t the device side > implementation on Vhost) ? > > Again, the motivation will be to do DMA on paged guest memory and potentially > avoiding the requirement of pinned/locked > guest physical memory for DMA. > > Thanks, > Ashish
If that's your goal, first step would be support in VFIO. End to end would only be helpful when running userspace drivers within guest, or nested virt. -- MST
