[lkml]   [2020]   [Feb]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] vhost: introduce vDPA based backend

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

 \ /
  Last update: 2020-02-05 04:12    [W:0.045 / U:0.764 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site