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

Raj, Ashok
2020-10-20T20:08:51Z

On Tue, Oct 20, 2020 at 04:55:57PM -0300, Jason Gunthorpe wrote:
> 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

So just to make this clear, I did check internally if there are any plans
for vDPA + SVM. There are none at the moment. It seems like you have
better insight into our plans ;-). Please do let me know who confirmed vDPA
roadmap with you and I would love to talk to them to clear the air.

Cheers,
Ashok