[Fedora-xen] Problem assigning a usb or pci port to a domU

[Pascal Parrot]

Hi,
I am (re)posting this here as I haven't had much luck on the xen user 
mailing list.
I am using FC5 and xen 3.0.2 (what comes with yum).

I am trying to assign a pci or usb port to a domU. I get to the point where 
pciback seizes the devices (5 usb and 2 pci) by modifying the 
/etc/modprobe.conf configuration as explained in 
http://wiki.xensource.com/xenwiki/Assign_hardware_to_DomU_with_PCIBack_as_module.

I then modified the configuration of the domU with pci = [ '00:1d.0' , 
'00:1d.1' , '00:1d.2' , '00:1d.3' , '00:1d.7', '02:01.0' , '02:02.0' ] but 
nothing shows up in the domU. I also tried adding the parameter in the 
command line (xm create domu pci=...).

[root at web ~]# lsusb
[root at web ~]# lspci
pcilib: Cannot open /proc/bus/pci
lspci: Cannot find any working access method.
[root at web ~]#

How can I make the domU recognize the two LAN interfaces and 2 usb devices 
(usb drive and ethernet interface) plugged in? Could it be that these 
devices do not have drivers? How can I check/fix that?

Here is part of the dmesg
pciback 0000:00:1d.0: seizing device
pciback 0000:00:1d.1: seizing device
pciback 0000:00:1d.2: seizing device
pciback 0000:00:1d.3: seizing device
pciback 0000:00:1d.7: seizing device
pciback 0000:02:01.0: seizing device
pciback 0000:02:02.0: seizing device
ACPI: PCI Interrupt 0000:02:02.0[A] -> GSI 17 (level, low) -> IRQ 17
ACPI: PCI Interrupt 0000:02:01.0[A] -> GSI 22 (level, low) -> IRQ 18
ACPI: PCI Interrupt 0000:00:1d.7[D] -> GSI 23 (level, low) -> IRQ 19
ACPI: PCI Interrupt 0000:00:1d.3[A] -> GSI 16 (level, low) -> IRQ 20
ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 16
ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 19 (level, low) -> IRQ 21
ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 16 (level, low) -> IRQ 20

After I start the domU
pciback: vpci: 0000:00:1d.0: assign to virtual slot 0
pciback: vpci: 0000:00:1d.1: assign to virtual slot 0 func 1
pciback: vpci: 0000:00:1d.2: assign to virtual slot 0 func 2
pciback: vpci: 0000:00:1d.3: assign to virtual slot 0 func 3
pciback: vpci: 0000:00:1d.7: assign to virtual slot 0 func 7
pciback: vpci: 0000:02:01.0: assign to virtual slot 1
pciback: vpci: 0000:02:02.0: assign to virtual slot 2

There is an eror message in xm dmesg but, from what I read, it does not seem 
to be a problem. (XEN) DOM4: (file=mm.c, line=578) Non-privileged attempt to 
map I/O space 00000000 (XEN) DOM4: (file=mm.c, line=578) Non-privileged 
attempt to map I/O space 00000000

This is what I get from lsusb when I do not assign it to a domU
lsusb
Bus 005 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
Bus 004 Device 002: ID 05dc:0080 Lexar Media, Inc. Jumpdrive Secure 64MB
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 002: ID 0bda:8150 Realtek Semiconductor Corp. RTL8150 Fast 
Ethernet Adapter
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000

Thanks,
Pascal