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

Jason Wang
2020-01-20T08:45:04Z

On 2020/1/19 下午5:59, 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