Re: [PATCH v2 04/10] PCI/P2PDMA: Clear ACS P2P flags for all devices behind switches

[Logan Gunthorpe]

On 01/03/18 02:35 PM, Jerome Glisse wrote:
Note that they are usecase for P2P where IOMMU isolation matter and
the traffic through root complex isn't see as an issue. 

Well, we can worry about that once we have a solution to the problem of 
knowing whether a root complex supports P2P at all. I'm not sure how 
people are going to solve that one.

For the time being, this work is for cards behind a switch only.

Logan