PCI problems with Xen kernel on SiS motherboard

[Winston Chang]

I just installed FC5-T3 on my computer.  With the normal kernel,  
everthing works fine, but when I boot into the xen-hypervisor kernel,  
kudzu crashes and eth0 won't come up -- it says no such device.  USB  
ports don't work either, under the xen kernel.

I think the problem has something to do with PCI under the xen  
kernel.  Running lspci under the xen kernel returns absolutely  
nothing, and there is nothing in /proc/pci either.  This happens with  
both the stock 1955 kernel and the updated 2009 kernel.  It also  
happened with the FC4 xen kernel, which I why I went to a FC5 test  
distribution in the first place...

It's a desktop system, but it has a mobile Athlon XP 2800+ on a cheap  
PC Chips motherboard, with a SiS 760 GX northbridge and a SiS 964  
southbridge.

Has anyone else seen this or know of a possible fix?

--Winston

===============================================
This is the output when I run on the non-xen kernel (the xen kernel  
simply returns nothing for lspci):

[root@localhost ~]# uname -a
Linux localhost.localdomain 2.6.15-1.2009.4.2_FC5 #1 Thu Mar 2  
18:10:16 EST 2006 i686 athlon i386 GNU/Linux

[root@localhost ~]# lspci
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 741/741GX/M741  
Host (rev 03)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SiS AGP Port  
(virtual PCI-to-PCI bridge)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS964 [MuTIOL  
Media IO] (rev 36)
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE]  
(rev 01)
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS]  
Sound Controller (rev a0)
00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0  
Controller (rev 0f)
00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0  
Controller (rev 0f)
00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0  
Controller (rev 0f)
00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0  
Controller
00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900  
PCI Fast Ethernet (rev 91)
01:00.0 VGA compatible controller: nVidia Corporation NV43 [GeForce  
6600/GeForce 6600 GT] (rev a2)

[Stephen C. Tweedie]

Hi,

On Sun, 2006-03-05 at 13:19 -0500, Winston Chang wrote:
>  I just installed FC5-T3 on my computer.  With the normal kernel,  
>  everthing works fine, but when I boot into the xen-hypervisor kernel,  
>  kudzu crashes  
Known, and we're working on it:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=179013

>  and eth0 won't come up -- it says no such device. 
It would be really helpful if you could try the 1.2009.4.2 kernel from
rawhide (you'll need to update the xen rpm too.)

>  I think the problem has something to do with PCI under the xen  
>  kernel.  Running lspci under the xen kernel returns absolutely  
>  nothing, and there is nothing in /proc/pci either.  This happens with  
>  both the stock 1955 kernel and the updated 2009 kernel.  
Plain 1.2009 or 1.2009.4.2?

>  It's a desktop system, but it has a mobile Athlon XP 2800+ on a
> cheap  
>  PC Chips motherboard, with a SiS 760 GX northbridge and a SiS 964  
>  southbridge.
>  
>  Has anyone else seen this or know of a possible fix? 
I haven't heard it reported before; please open a bugzilla, as we'll
need to collect proper kernel log info to dig into this.

Thanks,
 Stephen

[Winston Chang]

> > I think the problem has something to do with PCI under the xen
> > kernel.  Running lspci under the xen kernel returns absolutely
> > nothing, and there is nothing in /proc/pci either.  This happens with
> > both the stock 1955 kernel and the updated 2009 kernel.
>
>  Plain 1.2009 or 1.2009.4.2? 
I'll check this tonight and post it...

> > It's a desktop system, but it has a mobile Athlon XP 2800+ on a cheap
> > PC Chips motherboard, with a SiS 760 GX northbridge and a SiS 964
> > southbridge.
> >
> > Has anyone else seen this or know of a possible fix?
>
>  I haven't heard it reported before; please open a bugzilla, as we'll
>  need to collect proper kernel log info to dig into this. 
I opened a bugzilla with xensource on this issue -- in their forums I  
saw that two other people had the same problem with SiS chipsets.   
Should I open one with Fedora as well?

Is there log info I should collect besides /var/log/messages and dmesg?

Thanks,
-Winston

[Stephen C. Tweedie]

Hi,

On Mon, 2006-03-06 at 17:01 -0500, Winston Chang wrote:

>  I opened a bugzilla with xensource on this issue -- in their forums I
>  
>  saw that two other people had the same problem with SiS chipsets.   
>  Should I open one with Fedora as well? 
You can, if you like, certainly.  Generally, platform problems like that
are usually easiest hunted down upstream, but an FC bugzilla will still
help to track it.

>  Is there log info I should collect besides /var/log/messages and
> dmesg? 
Not really, that's the first thing definitely.

--Stephen