[Xen-users] e1000: probe of 0000:00:00.0 failed with error -5

[Thomas Harold <tgh@xxxxxxxxxxxx>]

I'm having trouble passing 2 ethernet NICs to a DomU.  I'm referencing:

http://wiki.xensource.com/xenwiki/Assign_hardware_to_DomU_with_PCIBack_as_module

The Dom0 kernel seems to be configured correctly.  The pciback module is 
compiled as built-in so I'm passing the pciback.hide on the kernel line 
in grub.conf:
module /vmlinuz-2.6.16.28-xen0 root=/dev/md1 pciback.hide=(01:07.0)(01:07.1)

Output of dmesg:

Kernel command line: root=/dev/md1 pciback.hide=(01:07.0)(01:07.1)
...
pciback 0000:01:07.0: seizing device
pciback 0000:01:07.1: seizing device
...

So things seem to be working properly in Dom0.

# lspci
...
01:07.0 Ethernet controller: Intel Corporation 82546GB Gigabit Ethernet 
Controller (rev 03)
01:07.1 Ethernet controller: Intel Corporation 82546GB Gigabit Ethernet 
Controller (rev 03)
01:08.0 Serial controller: 3Com Corp, Modem Division 56K FaxModem Model 
5610 (rev 01)
...

Then I'm passing these 2 PCI devices (2 ports on an Intel PRO/1000 PCI-X 
dual-port NIC) to the DomU.  The NIC on the motherboard is connected to 
the xenbr0 and we're passing that address in as well.
vif = [ 'bridge=xenbr0' ]
pci = [ '01:07.0', '01:07.1' ]

Here's output from dmesg in Dom0:

PCI: setting up Xen PCI frontend stub
xen_mem: Initialising balloon driver.
SCSI subsystem initialized
PCI: System does not support PCI
PCI: System does not support PCI
IA32 emulation $Id: sys_ia32.c,v 1.32 2002/03/24 13:02:28 ak Exp $
pcifront pci-0: Installing PCI frontend
pcifront pci-0: Creating PCI Frontend Bus 0000:00
...
EXT3 FS on sda1, internal journal
Intel(R) PRO/1000 Network Driver - version 6.3.9-k4
Copyright (c) 1999-2005 Intel Corporation.
PCI: Enabling device 0000:00:00.0 (0000 -> 0003)
e1000: probe of 0000:00:00.0 failed with error -5
PCI: Enabling device 0000:00:00.1 (0000 -> 0003)
e1000: probe of 0000:00:00.1 failed with error -5
kjournald starting.  Commit interval 5 seconds
EXT3 FS on sda2, internal journal

And output of lspci inside the DomU:

# lspci
00:00.0 Ethernet controller: Intel Corporation 82546GB Gigabit Ethernet 
Controller (rev 03)
00:00.1 Ethernet controller: Intel Corporation 82546GB Gigabit Ethernet 
Controller (rev 03)
The e1000 driver is loaded as a module in the DomU kernel (using the 
"e1000" line in modprobe.conf).
===============================

I suspect that the "System does not support PCI" messages might be key 
to my problem.  The two PCI devices do seem to be showing up in the DomU 
and it could simply be that I need to add some options to the e1000 line 
in modprobe.conf.  Or maybe I've missed a configuration step?
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