Re: [Qemu-devel] [v6][PATCH 07/10] xen, gfx passthrough: register a isa bridge

[Chen, Tiejun]

On 2015/1/19 21:58, Michael S. Tsirkin wrote:
> On Mon, Jan 19, 2015 at 12:57:18PM +0100, Gerd Hoffmann wrote:
> > On Mo, 2015-01-19 at 17:28 +0800, Tiejun Chen wrote:
> > > Currently IGD drivers always need to access PCH by 1f.0. But we
> >
> > Obvious question: q35?
> >
> > q35 already has a isa bridge @ 0x1f.0.  Guess that needs to be extended
> > for the pass-through then (simliar to the host bridge) instead of adding
> > a dummy bridge.
> >
> > Also: again xen naming here.
> >
> > cheers,
> >    Gerd
>
> This hack probably doesn't have a chance to work well for q35
> due to the above conflict.

Yeah, and I remember as we discussed previously, something else also 
conflict with Xen and Windows currently so Xen doesn't intend to go Q35.

Thanks
Tiejun

> Happily future cards won't need it.