[Xen-users] Using a dedicated NIC in domU

[Rainer Sokoll <rainer@xxxxxxxxxx>]

Hi,

I saw this covered multiple times in the ML archive, but I did not find
a solution.

Here my environment:
OpenSuse 10.3, dom0 running 2.6.22.16-0.1-xenpae. 2 NICs, Broadcom
Corporation NetXtreme BCM5715 Gigabit Ethernet (rev a3), tg3 driver.
Xen is Suse's latest 3.1.0, both on dom0 and domU.

I was able to hide the 2nd NIC from dom0:
# lspci | grep Ether
0f:04.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5715 Gigabit 
Ethernet (rev a3)
0f:04.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5715 Gigabit 
Ethernet (rev a3)
# dmesg | grep -i pciback
pciback 0000:0f:04.1: seizing device
pciback: vpci: 0000:0f:04.1: assign to virtual slot 0
pciback: vpci: 0000:0f:04.1: assign to virtual slot 0
pciback: vpci: 0000:0f:04.1: assign to virtual slot 0
pciback: vpci: 0000:0f:04.1: assign to virtual slot 0
pciback: vpci: 0000:0f:04.1: assign to virtual slot 0
# ifconfig eth1
eth1: error fetching interface information: Device not found
# 

Now I want to export 0000:0f:04.1 into a domU. In its config, I have:
pci=[ '0f:04.1' ]
netif = 1

But if I do an lspci in domU, it returns nothing. Something in domU
looks strange to me:
# dmesg | grep -i pci
Allocating PCI resources starting at 20000000 (gap: 18800000:e7800000)
PCI: Fatal: No config space access function found
PCI: setting up Xen PCI frontend stub
PCI: System does not support PCI
PCI: System does not support PCI
pcifront pci-0: Installing PCI frontend
pcifront pci-0: Creating PCI Frontend Bus 0000:00
# 

What is that "System does not support PCI"? If I look at the running
kernel, it should:
# zgrep ^CONFIG_PCI /proc/config.gz 
CONFIG_PCI=y
CONFIG_PCI_GOANY=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCIEPORTBUS=y
CONFIG_PCIEAER=y
CONFIG_PCI_HERMES=m
CONFIG_PCI_ATMEL=m
CONFIG_PCI200SYN=m
CONFIG_PCIPCWATCHDOG=m
# 

Any help is appreciated,

Rainer

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