[Xen-users] About NIC passthrough to the guest system

["Alex Chan" <alex.chan@xxxxxxxxxxx>]

Hi,

        I very confuse how to make xen PCI passthrough to guest. I follow everything but still cannot get the PCI in the guest. Please help, thanks.

 

HOST: CentOS 5.3

Kernel : 2.6.18-128.1.6.el5xen

xen: xen-3.0.3-80.el5

 

[root@hm02 xen]# lspci | grep Ethernet
03:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12)
07:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12)
08:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet Controller (rev 06)
08:00.1 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet Controller (rev 06)
0a:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet Controller (rev 06)
0a:00.1 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet Controller (rev 06)
0d:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12)

 

I need "0a:00.1" to passthrough to the guest system.

 

 

[root@hm02 xen]# cat /etc/modprobe.conf
options pciback hide=(0a:00.1)
alias eth0 bnx2
alias eth1 bnx2
alias eth2 bnx2
alias eth3 e1000e
alias eth4 e1000e
alias eth5 e1000e
alias eth6 e1000e
alias scsi_hostadapter megaraid_sas
alias scsi_hostadapter1 ata_piix
alias scsi_hostadapter2 usb-storage

 

[root@hm02 xen]# dmesg | grep pciback
pciback 0000:0a:00.1: seizing device
pciback 0000:0a:00.1: enabling permissive mode configuration space accesses!
pciback 0000:0a:00.1: permissive mode is potentially unsafe!
pciback: vpci: 0000:0a:00.1: assign to virtual slot 0

 

[root@hm02 xen]# cat xen-test
name = "xen-test"
uuid = "cad318b5-be8b-2a75-bd02-9fad747f9e04"
maxmem = 1024
memory = 1024
vcpus = 1
builder = "hvm"
kernel = "/usr/lib/xen/boot/hvmloader"
boot = "c"
pae = 1
acpi = 1
apic = 1
localtime = 0



device_model = "/usr/lib64/xen/bin/qemu-dm"
sdl = 0
vnc = 1
vncunused = 1
keymap = "en-us"
disk = [ "file:/xen/xen-test.img,hda,w", ",hdc:cdrom,r" ]
vif = [ "mac=00:16:3e:0f:f9:e5,bridge=xenbr5" ]
pci = [ "0000:0a:00.1" ] or pci = [ "0a:00.1" ]
serial = "pty"

 

[root@hm02 xen]# cat /boot/config-2.6.18-128.1.6.el5xen | grep XEN
CONFIG_X86_64_XEN=y
CONFIG_X86_XEN_GENAPIC=y
CONFIG_XEN_PCIDEV_FRONTEND=y
# CONFIG_XEN_PCIDEV_FE_DEBUG is not set
CONFIG_NETXEN_NIC=m
CONFIG_XEN=y
CONFIG_XEN_INTERFACE_VERSION=0x00030203
# XEN
CONFIG_XEN_PRIVILEGED_GUEST=y
# CONFIG_XEN_UNPRIVILEGED_GUEST is not set
CONFIG_XEN_PRIVCMD=y
CONFIG_XEN_XENBUS_DEV=y
CONFIG_XEN_BACKEND=y
CONFIG_XEN_BLKDEV_BACKEND=m
CONFIG_XEN_BLKDEV_TAP=m
CONFIG_XEN_NETDEV_BACKEND=m
# CONFIG_XEN_NETDEV_PIPELINED_TRANSMITTER is not set
CONFIG_XEN_NETDEV_LOOPBACK=m
CONFIG_XEN_PCIDEV_BACKEND=y
CONFIG_XEN_PCIDEV_BACKEND_VPCI=y
# CONFIG_XEN_PCIDEV_BACKEND_PASS is not set
# CONFIG_XEN_PCIDEV_BACKEND_SLOT is not set
# CONFIG_XEN_PCIDEV_BE_DEBUG is not set
# CONFIG_XEN_TPMDEV_BACKEND is not set
CONFIG_XEN_BLKDEV_FRONTEND=m
CONFIG_XEN_NETDEV_FRONTEND=m
CONFIG_XEN_FRAMEBUFFER=y
CONFIG_XEN_KEYBOARD=y
CONFIG_XEN_SCRUB_PAGES=y
# CONFIG_XEN_DISABLE_SERIAL is not set
CONFIG_XEN_SYSFS=y
CONFIG_XEN_COMPAT_030002_AND_LATER=y
# CONFIG_XEN_COMPAT_LATEST_ONLY is not set
CONFIG_XEN_COMPAT_030002=y
CONFIG_XEN_UTIL=y
CONFIG_XEN_BALLOON=y
CONFIG_XEN_DEVMEM=y
CONFIG_XEN_SKBUFF=y
CONFIG_XEN_REBOOT=y
CONFIG_XEN_SMPBOOT=y
[root@hm02 xen]#

In the guest:

 

[root@xen-test ~]# lspci
00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
00:01.2 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 01)
00:02.0 VGA compatible controller: Cirrus Logic GD 5446
00:03.0 Class ff80: XenSource, Inc. Xen Platform Device (rev 01)
00:04.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 20)

I still cannot see the PCI passthrough, please help to see where I missed, thank you so much.

Best Regards
Alex

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