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RE: [Xen-devel] [PATCH 1/2] graphics passthrough with VT-d

To: "Han, Weidong" <weidong.han@xxxxxxxxx>
Subject: RE: [Xen-devel] [PATCH 1/2] graphics passthrough with VT-d
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Wed, 16 Sep 2009 11:57:14 +0100
Cc: "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>, "Lin, Ben Y" <ben.y.lin@xxxxxxxxx>, "Kay, Allen M" <allen.m.kay@xxxxxxxxx>, Jean Guyader <Jean.Guyader@xxxxxxxxxx>, Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>, 'Jean Guyader' <jean.guyader@xxxxxxxxx>, "'bengheng@xxxxxxxxxxxxxx'" <bengheng@xxxxxxxxxxxxxx>
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On Wed, 16 Sep 2009, Han, Weidong wrote:
> I heard VT-d didn't work with stubdom, it needs some efforts to support it. 
> Actually I didn't try stubdom with VT-d. 
> 

You are right, currently stubdom doesn't work with passthrough.
I have a patch series to make it work but it is not finished yet and I
have been pulled on other projects; I hope to resume my work on that in
the near future.

In any case the fact the currently passthrough doesn't work with
stubdom is not a good reason for introducing even more problematic
changes.


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