Re: [PATCH v4 1/6] iommu: Add a per domain PASID for DMA API

[Jason Gunthorpe]

On Wed, May 18, 2022 at 11:21:15AM -0700, Jacob Pan wrote:
> DMA requests tagged with PASID can target individual IOMMU domains.
> Introduce a domain-wide PASID for DMA API, it will be used on the same
> mapping as legacy DMA without PASID. Let it be IOVA or PA in case of
> identity domain.

Huh? I can't understand what this is trying to say or why this patch
makes sense.

We really should not have pasid's like this attached to the domains..

Jason