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


From: Michael S. Tsirkin
Subject: Re: [Qemu-devel] [v6][PATCH 07/10] xen, gfx passthrough: register a isa bridge
Date: Mon, 19 Jan 2015 15:58:40 +0200

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.
Happily future cards won't need it.

-- 
MST



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