Messages in this thread |  | | Subject | Re: [PATCH] vhost: introduce vDPA based backend | From | Jason Wang <> | Date | Wed, 5 Feb 2020 11:12:21 +0800 |
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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
> >> Thanks >> >>
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