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

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Mon, 20 Jan 2014, Stefano Stabellini wrote:
> 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

Sorry, I meant assigning the secondary VGA card (in Dom0) to HVM as its
secondary VGA card (the primary card would be the emulated VGA inside
the HVM guest).

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