Messages in this thread | | | Date | Wed, 4 Aug 2021 11:04:47 -0300 | From | Jason Gunthorpe <> | Subject | Re: [RFC v2] /dev/iommu uAPI proposal |
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On Mon, Aug 02, 2021 at 02:49:44AM +0000, Tian, Kevin wrote:
> Can you elaborate? IMO the user only cares about the label (device cookie > plus optional vPASID) which is generated by itself when doing the attaching > call, and expects this virtual label being used in various spots (invalidation, > page fault, etc.). How the system labels the traffic (the physical RID or RID+ > PASID) should be completely invisible to userspace.
I don't think that is true if the vIOMMU driver is also emulating PASID. Presumably the same is true for other PASID-like schemes.
Jason
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