Re: [Xen-devel] VGA passthrough on unstable

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, May 06, 2011 at 02:42:33AM +0800, Liwei wrote:
> On 6 May 2011 02:33, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> >
> > Ok. So pci=resource_alignment= should do it..
> >
> 
> Should it produce anything in the logs?
> 

Not sure.

> >
> > Uhm, I meant the CONFIG_XEN_PCIDEV_BACKEND_PASS,
> > CONFIG_XEN_PCIDEV_BACKEND_VPCI etc in kernel .config..
> >
> > If it's VPCI then the PCI ID's in the VM are different from dom0..
> > if it's PASS then PCI IDs will be the same.
> >
> > -- Pasi
> >
> 
> I have this, so I assume that means that the IDs are different? So
> those statements are referring to the graphics card and its audio
> device. With the pci=resource_alignment option, this is still
> happening, what gives?
> 

pci=resource_alignment has nothing to do with changing PCI IDs.

> CONFIG_XEN_PCIDEV_BACKEND_VPCI=y
> # CONFIG_XEN_PCIDEV_BACKEND_PASS is not set
> # CONFIG_XEN_PCIDEV_BACKEND_SLOT is not set
> # CONFIG_XEN_PCIDEV_BACKEND_CONTROLLER is not set

Ok, so maybe you should rebuild a kernel with PASS instead of VPCI ..
(to get matching PCI IDs in the VM).

-- Pasi


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