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RE: [Xen-devel] Re: [Xen-users] pci passthrough and Xenserver

  • To: "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: Matej Zary <zary@xxxxxxxxx>
  • Date: Fri, 12 Mar 2010 21:02:51 +0100
  • Accept-language: en-US
  • Acceptlanguage: en-US
  • Delivery-date: Fri, 12 Mar 2010 12:04:10 -0800
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AcrB96/f6tXEggyvSniQH69mhAq+JAAJlbCd
  • Thread-topic: [Xen-devel] Re: [Xen-users] pci passthrough and Xenserver

Hi, Etch (old stable) xen kernel should be still in repositories AFAIK.


Just add line into /etc/apt/sources with Etch repositories.
Set bigger priority for Lenny with apt-pinning. 
Install the 2.6.18xen kernel with aptitude (aptitude update; aptitude install 

Haven't tried yet, but should work eventually. :)



From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
[xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Ritu kaur 
Sent: 12 March 2010 16:18
To: Ian Campbell
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Re: [Xen-users] pci passthrough and Xenserver

what version of Debian Lenny should I be using for domU? I see below snippets 
in wiki.debian.org/Xen

The default Lenny kernel is the newer paravirt_ops version (2.6.26), which does 
not function as a dom0 (except for the -xen variants, which have dom0 support 
but also some issues running as domU (please clarify?). It will also not 
support PCI passthrough in a domU. For PCI passthrough, you have to run the 
2.6.18 etch kernel as both dom0 and domU.

Can you please point me to a domU kernel binary with PV drivers compiled in it 
and works with XCP 0.1.1 pci passthrough?


On Thu, Mar 11, 2010 at 11:32 PM, Ian Campbell 
<Ian.Campbell@xxxxxxxxxx<mailto:Ian.Campbell@xxxxxxxxxx>> wrote:
On Fri, 2010-03-12 at 03:04 +0000, Ritu kaur wrote:
> 4. after domU is up,
> a. lspci in domU shows nothing
> b. ifconfig/ifconfig -a shows no interface
> c. driver doesn't seem to load during boot(lsmod doesn't list it, did
> modprobe again)

You seem to be using Lenny as your domU. I don't think the kernel used
in Lenny has pcifront support. You could try installing a more up to
date pvops kernel in your domU.

> 5. lspci in dom0 still lists the pci device.

That is normal. The driver which is bound to the device is in domain 0
should be pciback not something else.


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