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xen-devel
RE: [Xen-devel] Using VT-D to grant a Windows DomU access to aPCIExpress
It's just that PCIe pass-through is not fully supported by Xen, so it is very
card/driver dependant.
If you are not working with the graphic's card driver then what you describe
sounds feasible and may actually work.
Thanks,
Guy.
> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
> David Stone
> Sent: Friday, December 07, 2007 3:56 PM
> To: Han, Weidong
> Cc: Xen Developers
> Subject: Re: [Xen-devel] Using VT-D to grant a Windows DomU
> access to aPCIExpress graphics card?
>
> Thanks for your response.
>
> > > graphics card I'd like to pass through is PCI Express.
> > > If so, what PCI devices do I have to hide from Dom0 and
> pass to my
> > > Windows DomU? Do I need to do this for the "PCI Express
> Root Port"
> > > AND "PCI Express Port 1" PCI devices as well has the
> graphics card
> > > itself?
> >
> > Graphices card is special. Many tricky things need to be
> done, such as
> > frame buffer, VGA guest bios, etc. So current VT-d in Xen doesn't
> > support assigning graphics card yet.
>
> I wonder if those complications (which I don't pretend to
> understand) would go away if the graphics card did not have
> to produce any output to a locally attached monitor? My goal
> is not to render the Windows DomU graphics to the local
> monitor, but rather to just use the graphics device to do
> work like rendering to an off-screen buffer. I can then do
> whatever I want with that buffer, such as send it over the
> network to another machine for display. The Windows DomU
> would be running completely headless...I can RDP into it to
> administer it.
>
> Would that make it more feasible?
>
> Thanks,
> Dave
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
>
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