Re: [Xen-users] PCI Passthru working on RHEL 5.1?

[Scott McKenzie <scott.xensource@xxxxxxxxxxxxx>]

Nadolski, Ed wrote:
> What Linux(es) is PCI passthru known to work?  I'm a Xen newbie trying
> to get PCI passthru to work on RHEL5.1.  Has anyone successfully done
> this?  I get the "seizing device" from pciback in dom0 but lspci in the
> domU shows nothing, and dmesg in the domU shows no messages from
> pcifront.  My domU config file entry looks like this:
>
> pci = [ '07:00.0' ]
>
> Any thoughts?  Do I need to rebuild the kernel with pcifront linked in?
> (I'm not sure if RHEL does that by default).
>
> Thanks in advance,
> Ed
>   
I'm using CentOS 5.1 to pass a modem through to a domU. My dom0 is using 
the distro's kernel which is 2.6.18-53.1.14.el5xen.
To get it working and survive a reboot I added the following lines to 
/etc/rc.local:
modprobe pciback
echo -n 0000:01:08.0 > /sys/bus/pci/drivers/pciback/new_slot
echo -n 0000:01:08.0 > /sys/bus/pci/drivers/pciback/bind


I then have pci = [ "0000:01:08.0" ] in the config file for my domU. 
Works like a charm.

HTH
Scott



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