Re: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Mon, 20 Jan 2014, Shakeel Butt wrote:
> On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
> <stefano.stabellini@xxxxxxxxxxxxx> wrote:
> > On Mon, 20 Jan 2014, Wu, Feng wrote:
> >> > -----Original Message-----
> >> > From: xen-devel-bounces@xxxxxxxxxxxxx
> >> > [mailto:xen-devel-bounces@xxxxxxxxxxxxx] On Behalf Of Shakeel Butt
> >> > Sent: Monday, January 20, 2014 1:48 PM
> >> > To: xen-devel@xxxxxxxxxxxxx
> >> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
> >> >
> >> > Hi all,
> >> >
> >> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
> >> > device model? I tried but I am getting error 'gfx_passthru' invalid
> >> > parameter for qemu-xen. I am able to do passthrough with qemu
> >> > traditional i.e. qemu-dm.
> >>
> >> As far as I know, only qemu-traditional supports vga pass-through right 
> >> now.
> >
> > Right.
> > It is not possible to assign your primary VGA card to a VM with
> > qemu-xen. You should be able to assign your secondary VGA card though.
> 
> Let me understand this correctly. If I have two VGA cards then I can
> passthrough
> secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this right and
> if yes how can I do it?

Yes, it is correct. Simply use normal PCI assignment

http://wiki.xen.org/wiki/Xen_PCI_Passthrough

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