billy lau wrote:

>
>
> On Thu, Dec 11, 2008 at 8:09 PM, Jun Koi <junkoi2004@xxxxxxxxx

> <mailto:junkoi2004@xxxxxxxxx>> wrote:
>
> On Fri, Dec 12, 2008 at 9:49 AM, billy lau <billylau@xxxxxxxxx

> <mailto:billylau@xxxxxxxxx>> wrote:
> > Hi xen developers,
> >
> > Does any of you know how to disable the cirrus-vga emulation for
> hvm in xen?
> > I have been trying to disable that from the source codes, but even
> with
> > that, I still see a VGA controller when I boot up my guest domain. In
> > particular, I would like to do this because I am passing through a
> graphics
> > card to my guest domain using direct pass through.
>
> Sorry that I dont understand your motivation. If your card is
> passthrough, the guest would load the appropriate driver for that. So
> why do you care about the cirrus-vga driver?
>
>
> This is because, even after installing the appropriate driver, there is
> a conflict of device. Even after I disabled the cirrus driver, the
> actual driver was reported to be "unable to access resources". Does that
> sound reasonable then?

I think at the moment there is no way to do it from the command line.
You have to comment out any call to pci_cirrus_vga_init,
isa_cirrus_vga_init, pci_vmsvga_init, pci_vga_init and isa_vga_init in
hw/pc.c (lines 939-962).

You may also want to disable loadind the vgabios, also in hw/pc.c
(load_image_targphys).