Subject: Re: [PATCH RFC] iommu: Enable per-device SSID space for SVA

From: Jason Gunthorpe <[email-masked]>
Date: Tue, 28 Apr 2026 14:44:03 -0300

On Tue, Apr 28, 2026 at 10:38:37AM -0700, Easwar Hariharan wrote:
> process address space, and would break the DSA<->IAA kind of interaction where the
> device drivers can communicate the PASID among each other to operate on the same
> process address space. 

That is not part of the Linux model...

Each device has to get its own SVA and it must use the returned PASID,
not just invent one from someplace else.

Jason