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Re: [Xen-devel] [Intel-gfx] ResettRe: [v5][PATCH 0/5] xen: add Intel IGD passthrough support
- To: "Chen, Tiejun" <tiejun.chen@xxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
- From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
- Date: Tue, 29 Jul 2014 10:32:07 +0200
- Cc: "peter.maydell@xxxxxxxxxx" <peter.maydell@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "anthony@xxxxxxxxxxxxx" <anthony@xxxxxxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, "airlied@xxxxxxxx" <airlied@xxxxxxxx>, "daniel.vetter@xxxxxxxx" <daniel.vetter@xxxxxxxx>, "intel-gfx@xxxxxxxxxxxxxxxxxxxxx" <intel-gfx@xxxxxxxxxxxxxxxxxxxxx>, "Kay, Allen M" <allen.m.kay@xxxxxxxxx>, "Kelly.Zytaruk@xxxxxxx" <Kelly.Zytaruk@xxxxxxx>, Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>, "qemu-devel@xxxxxxxxxx" <qemu-devel@xxxxxxxxxx>, "Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxx>, Ross Philipson <ross.philipson@xxxxxxxxxx>, Anthony Perard <anthony.perard@xxxxxxxxxx>
- Delivery-date: Tue, 29 Jul 2014 08:32:53 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
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
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