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

Jason Gunthorpe
2020-10-21T23:32:31Z

On Wed, Oct 21, 2020 at 01:03:15PM -0700, Raj, Ashok wrote:

> I'm not sure why you tie in IDXD and VDPA here. How IDXD uses native
> SVM is orthogonal to how we achieve mdev passthrough to guest and
> vSVM.

Everyone assumes that vIOMMU and SIOV aka PASID is going to be needed
on the VDPA side as well, I think that is why JasonW brought this up
in the first place.

We may not see vSVA for VDPA, but that seems like some special sub
mode of all the other vIOMMU and PASID stuff, and not a completely
distinct thing.

Jason