[Intel-gfx] ResettRe: [Xen-devel] [v5][PATCH 0/5] xen: add Intel IGD passthrough support

[Paolo Bonzini]

Il 29/07/2014 08:59, Chen, Tiejun ha scritto:
>>
>> (see https://lkml.org/lkml/2014/6/19/121)
>>> "gpu:drm:i915:intel_detect_pch: back to check devfn instead of check
>>> class
>>> type". Because Windows always use this way, so I think this point
>>> should be
>>> same between Linux and Windows.
>>
>> Didn't we discuss that we did not want to pass in PCH at all if we can?
> 
> I'm a bit confused since I guess I'm missing something important in this
> long discussion. I guess we just fake a simple PCIe device but just has
> PCI_VENDOR_ID_XEN/Real_PCH_Device_ID, and then well probe such a PCIe
> device inside intel_detect_pch(), right?

Yes, for the special PIIX4 legacy machine type we want to do that and
place the device at 00:1f.0.

Paolo