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

[Jean Guyader <jean.guyader@xxxxxxxxxx>]

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

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