On Wed, 2018-03-14 at 16:57 -0700, Samuel Sieb wrote:
> On 03/14/2018 04:17 PM, Patrick O'Callaghan wrote:
> > I do that literally every day, for Windows gaming. It took some effort
> > to set up but it works a treat. A good starting point is:
> > 
> > https://vfio.blogspot.co.uk/2015/05/vfio-gpu-how-to-series-part-1-hardware.html
> > 
> > Also the VFIO mailing list at 
> > https://www.redhat.com/mailman/listinfo/vfio-users
> 
> That requires a separate video card.  There is some work on doing 
> passthrough 3d which I think is supposed to be working, but only for X 
> (maybe Wayland?), because there's no driver for Windows.

Yes, when I said "some effort" that was what I meant, plus a fair
amount of configuration, including isolating the card from Linux so it
doesn't compete with the VM. Currently I don't see much prospect of
full 3d video passthrough given that video cards are separate
processors with (often) proprietary drivers that don't expect the video
context to change arbitrarily under their feet and don't provide a way
to snapshot their internal state (this applies to Windows too, even on
bare metal, which severely limits hibernation when using GPU drivers).
It's going to take a lot of industry effort (maybe via Vulkan, though
I'm reaching here) for this to work in the future.

poc
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