On Wed, Feb 05, 2020 at 11:12:21AM +0800, Jason Wang wrote: > > On 2020/2/5 上午10:05, Tiwei Bie wrote: > > 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 > > > I think so. Michael, do you think this makes sense? > > Thanks to make sure, could you post the suggested argument format for these ioctls? > > > > > > Thanks > > > > > >
