On Mon, Jun 04, 2018 at 11:14:36PM +1000, Benjamin Herrenschmidt wrote: > On Mon, 2018-06-04 at 05:55 -0700, Christoph Hellwig wrote: > > On Mon, Jun 04, 2018 at 03:43:09PM +0300, Michael S. Tsirkin wrote: > > > Another is that given the basic functionality is in there, optimizations > > > can possibly wait until per-device quirks in DMA API are supported. > > > > We have had per-device dma_ops for quite a while. > > I've asked Ansuman to start with a patch that converts virtio to use > DMA ops always, along with an init quirk to hookup "direct" ops when > the IOMMU flag isn't set. > > This will at least remove that horrid duplication of code path we have > in there. > > Then we can just involve the arch in that init quirk so we can chose an > alternate set of ops when running a secure VM. > > This is completely orthogonal to whether an iommu exist qemu side or > not, and should be entirely solved on the Linux side. > > Cheers, > Ben. Sounds good to me. -- MST _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
