Re: [Xen-users] X server in a domU, with pci access and no X in dom0

[Nawal Husnoo <galileon@xxxxxxxxx>]

hello,




Adam Seering wrote:
> Hi,
>     Right now, in order for graphics cards to work properly, their X 
> drivers have to be modified to recognize Xen.  I don't think this has 
> been done for any open-source graphics card drivers; there is a way to 
> get the NVidia binary module to work, but it requires a fair bit of 
> Googling and kernel and module patching, and things like that.  I was 
> able to follow the instructions at 
> <http://www.nvnews.net/vbulletin/showthread.php?t=68703>, and with 
> some tweaking I did get a graphics card to work.
>     Note that the domU doesn't have physical access to your hardware.  
> This means, No keyboard and mouse, unless you have a PCI USB card and 
> you export that card to your domU as well, and configure X to use them.
> Adam
>
>
> On Aug 22, 2006, at 11:02 AM, nicko.koinkoin@xxxxxxx wrote:
>
> > Hi everybody
> >
> > I try to have a running X server in a domU.
> >
> > What I want is not to have an X server in dom0, for security 
> > purposes. I know
> > that it is not an easy thing, but I need it. First I hide the video 
> > card from
> > dom0, what is working fine. Indeed, lspci in dom0 doesn't show the 
> > video card.
> > I give direct access to the video card to my domU, thanks to its 
> > configuration
> > file. But in fact I can't launch my X server. Indeed, during the boot 
> > of my
> > domU, I got the following error message :
> >
> >  * Loading key mappings ...assuming iso-8859-1 cedilla
> > assuming iso-8859-1 acute
> > assuming iso-8859-1 diaeresis
> > assuming iso-8859-1 brokenbar
> > assuming iso-8859-1 threequarters
> > assuming iso-8859-1 currency
> > assuming iso-8859-1 onehalf
> > assuming iso-8859-1 onequarter
> > assuming iso-8859-1 currency
> > Couldnt get a file descriptor referring to the console
> >
> >  * Error loading key mappings
> >                                                                       
> >     [ !! ]
> >  * Setting terminal encoding to ASCII 
> > ...                                 [ ok ]
> >  * Setting user font ...Couldnt open //dev/vc/1
> > Couldnt open //dev/vc/2
> > Couldnt open //dev/vc/3
> > Couldnt open //dev/vc/4
> > Couldnt open //dev/vc/5
> > Couldnt open //dev/vc/6
> > Couldnt open //dev/vc/7
> > Couldnt open //dev/vc/8
> > Couldnt open //dev/vc/9
> > Couldnt open //dev/vc/10
> > Couldnt open //dev/vc/11
> >
> >  * Failed to set user font
> >                                                                       
> >     [ !! ]
> > So of course when typing startx, I got :
> >
> > Fatal server error:
> > xf86OpenConsole: Cannot open /dev/tty0 (No such device)
> >
> > I use Gentoo Linux with kernel 2.4.30 as my domU (the same for dom0, 
> > but there
> > is no error messages during dom0 boot), the configuration file of my 
> > domU is:
> > kernel  = "/boot/vmlinuz-2.4.30-xenU-basic"
> >
> > memory  = 128
> >
> > name    = "domU"
> >
> > nics    = 1
> >
> > vif = ['mac=aa:00:00:00:00:d2, bridge=xen-br0']
> >
> > disk = ['phy:/dev/hda5,hda1,w',
> >         'phy:/dev/hda6,hda2,w']
> >
> > root = "/dev/hda1 ro";
> >
> > #extra="xencons=ttyS console=tty0"
> > extra="console=tty0"
> >
> > pci=['02,00,0']
> >
> > I also try to append the same options to my domU kernel as the ones 
> > of dom0, but
> > thus no console is available during boot, so no display at all.
> > Please let's me know if what I try is a crazy thing, or if someone 
> > has already
> > suceeded in having a running and usable X server in a domU with no X 
> > in dom0,
> > or if it can be a Gentoo specific error due to devfs.
> >
> > Thanks a lot.
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> _______________________________________________
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