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Re: [Xen-devel] [Intel-gfx] [RFC][PATCH] gpu:drm:i915:intel_detect_pch: back to check devfn instead of check class type

On Mon, Jul 07, 2014 at 04:57:45PM +0200, Paolo Bonzini wrote:
> Il 07/07/2014 16:49, Daniel Vetter ha scritto:
> >So the correct fix to forward intel gpus to guests is indeed to somehow
> >fake the pch pci ids since the driver really needs them. Gross design, but
> >that's how the hardware works.
> A way that could work for virtualization is this: if you find the card has a
> magic subsystem vendor id, fetch the subsystem device id and use _that_ as
> the PCH device id.
> Would that work for you?

I guess for quemu it also depends upon what windows does since we can't
change that. If we care about that part. Another consideration is
supporting older kernels, if that's possible at all.
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

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