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xen-users
Re: [Xen-users] PCI Passthrough on VTd Enabled Board
Phil Winterfield (winterfi) wrote:
I am trying to run a paravirtualized guest OS and use the split driver
model on an Intel board with VTd enabled. When I set up the device
passthrough as per the xen wiki
(http://wiki.xensource.com/xenwiki/VTdHowTo), I find that the device
still shows up in dom0 and does not get passed into my guest OS. The
xenbus read returns not found for xen-3.0-x86_32p/backend-id.
Can you see anything missing below?
_lspci:_
[root@localhost phil]# lspci
.
.
01:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit
Ethernet Controller (rev 06)
01:00.1 Ethernet controller: Intel Corporation 82571EB Gigabit
Ethernet Controller (rev 06)
02:00.0 Ethernet controller: Intel Corporation 82557/8/9 Ethernet Pro
100 (rev 09)
_from grub.conf_
title Xen-Fedora Core (2.6.18-xen)
root (hd0,0)
kernel /xen.gz com1=115200,8n1 console=com1
module /vmlinuz-2.6.18.8-xen root=LABEL=/ ro xencons=ttyS
console=tty0 console=ttyS0, pciback.hide=(01:00.0)(01:00.1)
Most distributions do not compile pciback module statically to the
kernel, but as a module. If the pciback support is compiled as a module,
adding pciback.hide=(blah)(blah) to kernel is useless. You have to do
that in your modprobe.conf and reboot to take that into effect. I do
something like the below one in my modprobe.conf.
install bnx2 /sbin/modprobe pciback ; /sbin/modprobe --first-time
--ignore-install bnx2
options pciback hide=(0000:09:00.0) verbose_request=1
Obviously make changes wherever required. If pciback is compiled
statically to your kernel, your configuration is correct.
--Sadique
module /initrd-2.6.18-xen.img
_from /etc/xen/pv.conf_
pci = [ '01:00.0', '01:00.1' ]
_from guest OS console_:
************************ NETFRONT for xen-3.0-x86_32p **********
net TX ring size 256
net RX ring size 256
Failed to read xen-3.0-x86_32p/backend-id.
Thread "netfront" exited.
******************* PCIFRONT for device/pci/0 **********
Failed to read device/pci/0/backend-id.
Error ENOENT when reading the backend path device/pci/0/backend
Thread "pcifront" exited.
------------------------------------------------------------------------
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http://lists.xensource.com/xen-users
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