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

[Chen, Tiejun]

On 2014/7/29 16:32, Paolo Bonzini wrote:
> 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.
>

Got it.

BTW, please review those patches implemented a separate machine, xenigd, 
firstly. Then I can step on this point.

Thanks
Tiejun