Hello Peter,
Some people have been asking for tips about Nvidia Xen VGA passthru,
so maybe you could help? 
Could you post the exact steps you did? 
Have you tried with Xen 4.0.x after your initial experiments in 2009? 
Thanks!
-- Pasi
On Mon, Jan 26, 2009 at 02:16:32PM -0500, Peter J. van der Maas wrote:
> I am happy to announce that I have successfully (and finally!) been able
> to pass a PCIe graphics card via VT-d to a Windows XP HVM DomU.
>
>
>
> About time!
>
>
>
> Config:
>
> -Intel Q6600 Core 2 Quad-Core, G0 stepping (I think)
>
> -Intel DQ35JO Motherboard, Q35 Chipset, BIOS v.991 (1/9/09), VT and VT-d
> enabled
>
> -nVidia 9500GT (for VT-d passthrough - DomU)
>
> -nVidia GeForce2 MX200 (Dom0 console)
>
> -Xen (build: xen-unstable, recent as of ~ 1/25/09 1:00AM-EST)
>
> -Dom0: Linux-2.6.18.8-xen (via xen-unstable.hg)
>
> -DomU: Windows XP (pro, sp3, 32-bit)
>
>
>
> Once the VT-d bugs were recently corrected (thank you, xen-devel!),
> everything went fairly smoothly. Still very buggy yet (its
> xen-unstable!), but overall it works.
>
>
>
> Make sure support for the PCI-backend is compiled into the kernel (not
> just a module) and that you have your pciback.hide options in grub
> (late-binding may work, but I haven't tried).
>
>
>
> Good luck!
>
>
>
>
>
> -Peter van der Maas
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> http://lists.xensource.com/xen-users 
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