RE: [PATCH RFC v2 00/18] Add VFIO mediated device support and DEV-MSI support for the idxd driver

[Tian, Kevin]

> From: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Sent: Friday, August 14, 2020 9:24 PM
> 
> The same basic argument goes for all the points - the issue is really
> the only uAPI we have for this stuff is under VFIO, and the better
> solution is to disagregate that uAPI, not to try and make everything
> pretend to be a VFIO device.
> 

Nobody is proposing to make everything VFIO. there must be some
criteria which can be brainstormed in LPC. But the opposite also holds - 
the fact that we should not make everything VFIO doesn't imply
prohibition on anyone from using it. There is a clear difference between 
passthrough and userspace DMA requirements in idxd context, and we
see good reasons to use VFIO for our passthrough requirements.


Thanks
Kevin