Xen users - Sep 2007 - Trying to get up native X11 in domU

Hi,

I''m trying to get up X11 native in a domU. What I have done up to now:

- Set up a dom0 (x86_64), hiding the Nvidia Card from dom0 by
  pciback.hide and giving dom0 a serial console.
- Set up a domU (x86_64), assining the Nvidia Card to this domU
- Install faketty modul from backstreet ruby project to give X11 a
  dummy console inside of domU
- Install X11 and build a xorg.conf file.

Up to this stage everything works fine, but when I start the xserver
the xen hypervisor put out a message:

(XEN) mm.c:612:d4 Non-privileged (4) attempt to map I/O space 000000a0

And the X11 logfile shows up:

...
(II) NV(0): Initializing int10

Fatal server error:
xf86MapVidMem: Could not mmap framebuffer (0x000a0000,0x20000) (Bad address)

When using the vesa driver for X11 it''s the same as with the nv
driver.

Ok, I think the X11 tries to map the video memory but as we are in a
domU we have no privilegedes to do this. Is there a way to give domU
the permission to map the IO space. I''ve seen the
xend-pci-permissive.sxp and xend-pci-quirks.sxp files, but they are
for the config space.

Any hints how to get it work?

  Stefan

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Well if nvidia can write some compatible driver, may work as I hear from
some people having success in such setup. Did you try the "nv" driver?

In my setup, I have 2 X''s running on Dom0, one for Dom0, another for
DomU. I
do XDMCP. Even Compiz works :)

For audio, I use pulseaudio in Dom0 that acts as an ESD and Pulseaudio
server to clients, along with avahi.

Br,

Emre

On 9/5/07, Stefan Neuwirth <neuwirt-xen-users@trillian.hd.shuttle.de>
wrote:
>
> "Emre Erenoglu" <erenoglu@gmail.com> writes:
>
> > I ended up with the same problem. I think there''s some work
to be done
> > inside nvidia kernel module, which only nvidia can do.
> >
> > Why don''t you use FrameBuffer device with SDL or VNC?
>
> I had the idea of a minimal dom0 that just serves the hardware for the
> guests and nothing else.
>
> I don''t think that nvidia can do anything. The pci device is not
> activated in dom0 and so dom0 can''t do anything with this device.
On
> the other side domU can not set up the memory mapping after activating
> the device.
>
> I will set up the X11 in dom0 for now...
>
>   Stefan
>


-- 
Emre Erenoglu
erenoglu@gmail.com


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