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

[Gordan Bobic <gordan@xxxxxxxxxx>]

On Wed, 24 Jul 2013 14:57:02 +0300, Pasi KÃrkkÃinen <pasik@xxxxxx> 
wrote:
> On Wed, Jul 24, 2013 at 10:33:38AM +0000, Ren, Yongjie wrote:
> > >
> > > Dear Yongjie,
> > >
> > > Could you share with us your hardware and software configuration
> > > settings?
> > >
> > Sure. My IGD is also Intel HD Graphics 4600. :-)
> >
> > 1. hypervisor version: c/s 26666 in xen-unstable.hg tree  (5 months 
> > ago)
> >   traditional qemu commit: 5ae58eaa967495fce99b727422054c58750d252b
> >   Dom0 kernel: Linux 3.8.1
> > 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?
PCI and GPU passthru work fine for me on 4.2.2 and 4.3.0
using qemu-dm (traditional), but only as long as I don't
assign > 2GB of RAM to a domU. I'm sure I saw patches
that were expected to address this that were also
supposed to be in 4.3.0, so either the patches didn't
make it into 4.3.0 for some reason, or the bug I am
hitting is a different bug with similar symptoms.

When I get around to it I'm going to set up a
Linux domU with GPU passthrough and > 2GB of RAM
so I can easily compare the memory maps and where
the GPU's BARs are mapped and see if there is an
obvious overlap where the memory stomp happens.

Gordan

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