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

[Paolo Bonzini]

Il 30/06/2014 05:13, Chen, Tiejun ha scritto:
> After I discuss internal, we think even we just set the real
> vendor/device ids to this ISA bridge at 00:1f.0, guest firmware should
> still work well with these pair of real vendor/device ids.
>
> So if you think something would conflict or be broken, could you tell us
> what's exactly that? Then we will double check.

The Xen hvmloader doesn't break since it only supports one chipset.  But 
SeaBIOS checks for the exact vendor/device ids since Q35 support was added.

If you want to add this feature, try to implement it in a way that is a 
bit more forward-looking.  I'm sure that Xen sooner or later will want a 
PCIe chipset, otherwise things such as AER forwarding are impossible.

Paolo