OK - it's possible that this patch
commit 349a3b1cc9023f67f8fa336cb3c4a8f21a4aaaf3
Author: Cao jin <caoj.f...@cn.fujitsu.com>
Date: Sat Jan 2 16:02:20 2016 +0800
igd-passthrough: fix use of host_pci_config_read
is required for older guests.
This patch just went it - could you test latest master please?
On Tue, Jan 12, 2016 at 08:41:13AM +0000, Hao, Xudong wrote:
> Yes, Linux VM update to a 3.18 kernel.
> The RHEL7.2 default kernel (should be 3.10) VM don't boot up with IGD
> pass-through, and Windows can't boot up either.
>
> Thanks,
> -Xudong
>
>
> > -----Original Message-----
> > From: Gerd Hoffmann [mailto:kra...@redhat.com]
> > Sent: Monday, January 11, 2016 6:32 PM
> > To: Hao, Xudong <xudong....@intel.com>
> > Cc: Stefano Stabellini <stefano.stabell...@eu.citrix.com>; Lars Kurth
> > <lars.ku...@citrix.com>; xen-de...@lists.xensource.com; Michael S. Tsirkin
> > <m...@redhat.com>; Lars Kurth <lars.kurth....@gmail.com>; qemu-
> > de...@nongnu.org; Cao jin <caoj.f...@cn.fujitsu.com>; Stefano Stabellini
> > <stefano.stabell...@citrix.com>
> > Subject: Re: [Qemu-devel] [Xen-devel] [PATCH v4] igd-passthrough-i440FX:
> > convert to realize()
> >
> > Hi,
> >
> > > I can boot up Linux VM with IGD pass-through with latest qemu (without
> > > any additional patch), guest run 3D "nexuiz" and get 180fps.
> >
> > That is a pretty recent linux guest I assume?
> > Tried older kernels too, possibly even the old userspace xorg driver?
> > Do windows guest work as well?
> >
> > cheers,
> > Gerd
>
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