Re: [Xen-users] PCI Passthrough

[Alex Pearson <alex.pearson@xxxxxxxxxxxxxxxxx>]

Thanks Ryan, that was just the info i needed!
   Got the pci passthrough working, but couldn't achieve what i was 
after....
I wanted to boot my machine, then pass the USB controller (plugged extra 
keyboard & mouse into this), graphics and sound card to the domU, so it 
could use them for X11 etc....
   However i couldn't get X11 to start up, it kept giving me errors 
such as "xf86OpenConsole: Cannot open /dev/tty0" in the Xorg & gdm 
logs.  When doing this i noticed the screen connected to the graphics in 
question did get the initial xen dmesg's, even though i'd configured 
both xen & and dom0 to use the serial port as console.
   If anyone has managed to get this kind of setup working help would 
be much appreciated, however i think i might just have to accept i'm 
asking too much ;-)
Thanks in advance

Alex






Ryan wrote:
> On Wed, 2006-03-01 at 04:24 +0000, Alex.Pearson@xxxxxxxxxxxxxxxxx wrote:
> <snip>
>   
> > Grub config:
> >
> > title Xen 3.0 / XenLinux 2.6.12
> >         root (hd0,0)
> >         kernel /xen.gz dom0_mem=131072 com1=115200,8n1
> >         module /vmlinuz-2.6.12-xen0 root=/dev/hda2 ro console=ttyS0, 115200
> > pciback.hide=(0000:00:1d.0)(0000:00:1d.2)(0000:00:02.0)(0000:00:1f.3)
> >
> > Dmsg output:
> >
> > itops10:/boot/grub# dmesg | grep Unk
> > Unknown boot option
> > `pciback.hide=(0000:00:1d.0)(0000:00:1d.2)(0000:00:02.0)(0000:00:1f.3)':
> > ignoring
> >
> > Non of the devices are hidden when i do a lspci
> > I'm assuming this is because i'm doing something wrong, if i try to start a
> > machine regardless then i get the following, however i assume this is
> > because the hosts not configured:
> >
> > itops10:/boot/grub# grep pci /etc/xen/itops9
> > pci = ['00:02.0','00:1f.3','00:1d.2','00:1d.0']
> >
> > itops10:/boot/grub# xm create itops9
> > Using config file "/etc/xen/itops9".
> > Error: Invalid pci specifier: 00:02.0
> >
> > Any help would be much appreciated, i know someone on the list has got this
> > working, but could find any articles relating to any problems like this :-(
> > Am i missing some kernel modules?  Which ones, i've had a good look through
> > and can't find any obvious candidates
> >
> >     
> <snip>
>
> Are you compiling Xen from the xen-unstable mercurial tree or from a
> release tarball? Based on the fact that you're using a 2.6.12 kernel, I
> don't think the version of Xen/XenLinux that you're using has the PCI
> passthrough code in it (it was added relatively recently to
> xen-unstable, I think when 2.6.16-rc2 was the current version of
> XenLinux). It's not in any of the Xen 3.0.x releases so far. If you're
> compiling from xen-unstable, you need a changeset >= 8867.
>
> If I'm wrong about the version of Xen/XenLinux that you're using, you
> need to make sure that the pciback (CONFIG_XEN_PCIDEV_BACKEND) module is
> compiled into the dom0 kernel and the pcifront
> (CONFIG_XEN_PCIDEV_FRONTEND) module is compiled into the domU kernel.
> They'll also happily live together in the same kernel if you use the
> same kernel for your dom0 and your domU.
>
> Ryan
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>   
--

*Alex Pearson*
IT Officer
IT Infrastructure
01482 394567
Alex.Pearson@xxxxxxxxxxxxxxxxx <mailto:Alex.Pearson@xxxxxxxxxxxxxxxxx>



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