On Tue, Feb 04, 2020 at 02:46:16PM +0800, Jason Wang wrote: > On 2020/2/4 下午2:01, Michael S. Tsirkin wrote: > > On Tue, Feb 04, 2020 at 11:30:11AM +0800, Jason Wang wrote: > > > 5) generate diffs of memory table and using IOMMU API to setup the dma > > > mapping in this method > > Frankly I think that's a bunch of work. Why not a MAP/UNMAP interface? > > > > Sure, so that basically VHOST_IOTLB_UPDATE/INVALIDATE I think? Do you mean we let userspace to only use VHOST_IOTLB_UPDATE/INVALIDATE to do the DMA mapping in vhost-vdpa case? When vIOMMU isn't available, userspace will set msg->iova to GPA, otherwise userspace will set msg->iova to GIOVA, and vhost-vdpa module will get HPA from msg->uaddr? Thanks, Tiwei > > Thanks > > _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
