Re: [PATCH 3/5] vDPA: introduce vDPA bus

[Jason Wang]

On 2020/1/19 äå5:59, Michael S. Tsirkin wrote:
> On Sun, Jan 19, 2020 at 09:07:09AM +0000, Shahaf Shuler wrote:
> > > Technically, we can keep the incremental API
> > > here and let the vendor vDPA drivers to record the full mapping
> > > internally which may slightly increase the complexity of vendor driver.
> > What will be the trigger for the driver to know it received the last mapping on this series and it can now push it to the on-chip IOMMU?
> Some kind of invalidate API?

The problem is how to deal with the case of vIOMMU. When vIOMMU is 
enabling there's no concept of last mapping.

Thanks