Re: [Xen-users] VGA Passthrough attempted with an Nvidia GTX970

[Gordan Bobic <gordan@xxxxxxxxxx>]

On 2015-02-12 10:16, Kuba wrote:
> W dniu 2015-02-12 o 09:08, Gordan Bobic pisze:
> > 1) Patch QEMU to disable PCI snooping and prevent it showing to
> > the guest the CPU make/model is QEMU.
> >
> > This will prevent the driver from detecting it is running in a
> > VM and it will thus agree to initialize the GPU. Yes, Nvidia
> > driver looks for signs of being in a VM and if it finds them,
> > it will refuse to initialize GPUs other than the expensive
> > Quadros and Teslas (cheap Quadros and GeForces won't work).
> Could you please clarify what you meant by "patch QEMU"? I'm asking in
> hope that you are aware of some patch that does that and works with
> XEN :)
I cannot seem to find any of the mentioned patches that aren't
KVM specific, but you should be able to reverse engineer a suitable
solution from this, at least for the CPU ID:
http://git.qemu.org/?p=qemu.git;a=commit;h=f522d2acc549dd11f495048330aa5f3f424a7dfa

Here is a more complete discussion on an Arch forum (long):
https://bbs.archlinux.org/viewtopic.php?id=162768&p=31

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