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

To: 'Jean Guyader' <jean.guyader@xxxxxxxxxx>
Subject: RE: [Xen-devel] [PATCH 1/2] graphics passthrough with VT-d
From: "Han, Weidong" <weidong.han@xxxxxxxxx>
Date: Fri, 28 Aug 2009 16:30:27 +0800
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Thread-topic: [Xen-devel] [PATCH 1/2] graphics passthrough with VT-d
Jean Guyader wrote:
> On Fri, Aug 28, 2009 at 03:54:05AM -0400, Han, Weidong wrote:
>> This patch supports basic gfx passthrough on xen side:
>>   - retrieves VGA bios from host VGA BIOS address (0xC0000), then
>> load it to guest VGA BIOS address (This is the same with XCI). 
>>   - Enlarge guest MMIO range to contain gfx card's large memory
>>   - add a config option 'gfx_passthru' for gfx passthrough
>> Signed-off-by: Ben Lin <ben.y.lin@xxxxxxxxx>
>> Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>
> Hi,
> First thanks for taking the time to upstream those patch
> that will help a lot.
> I think the patch will be let intrusive if we could do all
> that bios mapping + copying inside qemu so we don't need to
> modify the xc_hvm_build function.
> Qemu starts before the bios so that should be doable.
> Thanks,
> Jean

Sounds good. 

You mean mapping + coping vgabios in hw/pc.c, right? We will go to change it. 


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