Re: [RFC v2] /dev/iommu uAPI proposal

[Jason Gunthorpe]

On Tue, Aug 03, 2021 at 11:58:54AM +1000, David Gibson wrote:
> > I'd rather deduce the endpoint from a collection of devices than the
> > other way around...
> 
> Which I think is confusing, and in any case doesn't cover the case of
> one "device" with multiple endpoints.

Well they are both confusing, and I'd prefer to focus on the common
case without extra mandatory steps. Exposing optional endpoint sharing
information seems more in line with where everything is going than
making endpoint sharing a first class object.

AFAIK a device with multiple endpoints where those endpoints are
shared with other devices doesn't really exist/or is useful? Eg PASID
has multiple RIDs by they are not shared.

Jason