Re: (proposal) RE: [PATCH v7 00/16] vfio: expose virtual Shared Virtual Addressing to VMs

Jason Gunthorpe
2020-10-20T19:56:09Z

On Tue, Oct 20, 2020 at 12:51:46PM -0700, Raj, Ashok wrote:
> I think we agreed (or agree to disagree and commit) for device types that
> we have for SIOV, VFIO based approach works well without having to re-invent
> another way to do the same things. Not looking for a shortcut by any means,
> but we need to plan around existing hardware though. Looks like vDPA took
> some shortcuts then to not abstract iommu uAPI instead :-)? When all
> necessary hardware was available.. This would be a solved puzzle.

I think it is the opposite, vIOMMU and related has outgrown VFIO as
the "home" and needs to stand alone.

Apparently the HW that will need PASID for vDPA is Intel HW, so if
more is needed to do a good design you are probably the only one that
can get it/do it.

Jason