Re: [Xen-devel] Intel HD Graphics 4600 Xen VGA Passthrough to Windows 7 Ultimate HVM domU

[Gordan Bobic <gordan@xxxxxxxxxx>]

On Thu, 25 Jul 2013 12:07:25 +0300, Pasi KÃrkkÃinen <pasik@xxxxxx> 
wrote:
> On Thu, Jul 25, 2013 at 08:58:58AM +0000, Ren, Yongjie wrote:
> > > > N.B. I didn't use the latest traditional qemu because of the 
> > following bug:
> > > > 
> > http://bugzilla-archived.xenproject.org//bugzilla/show_bug.cgi?id=1865
> > > >
> > >
> > > Hmm.. isn't that bug affecting qemu-traditional in general, not 
> > PCI/GPU
> > > passthru specifically?
> > > Or is it *only* PCI/GPU passthru that it breaks for you?
> > >
> > It's a general device assignment issue.
> > Any PCI device can't be assigned to a HVM guest with the latest 
> > qemu-traditional.
> Ok. Is there already a separate thread on xen-devel about the
> qemu-traditional PCI assignment issue?
> If not, we should create one.
FWIW, I'm using qemu-dm (i.e. traditional) in 4.3 and am successfully
passing USB, audio, GPU PCI devices using it (as long as I stay under
the 2GB domU RAM limit). So whatever the issue is it isn't generic.

That bug report doesn't include the domU config file, and IIRC
I saw a similar error when device_model/device_model_override and
device_model_version don't match or are unavailable in the build
(e.g. building without upstream and specifying traditional or
vice versa). More info needed to verify, I think.

Gordan

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