question about : inv smmu atc all cmd timeout when pcie dpc occur.

Hi Zhongmiao,

On Mon, Jul 02, 2018 at 02:24:45PM +0000, Zhongmiao wrote:

      I?m testing  pcie  ats feature .     when some  error occur pcie dpc
 then  link down .  iommu will   remove device from iommu group and send  atc
inv all  cmd to  device .

 

But , pcie already  link down , so  atc inv all  will   time out .  I what to
know kernel  driver  how to think aout it  ?  thanks .  ^_^.

Mainline doesn't do anything with ATC invalidate. Which tree are you using?

Will