Xen devel - Sep 2009 - mkinitrd fails to include ''pciback'' module on openSUSE 11.1

I have installed openSUSE 11.1 w/ xen and then updated it to latest
xen-3.4-testing.  It boots fine and is running linux-2.6.27-9 OK, except
that pci passthrough does not work, presumably because the
''pciback''
module was not included in the initrd-2.6.27.7-9-xen image.  To correct
this I did the following steps:

 

In  /etc/sysconfig/kernel I have changed this line to now include the
pciback module:

INITRD_MODULES="pciback ahci processor thermal fan jbd ext3 edd"

 

I recompile mkinitrd:

greencity01:/home # mkinitrd

 

Kernel image:   /boot/vmlinuz-2.6.27.7-9-xen

Initrd image:   /boot/initrd-2.6.27.7-9-xen

Root device:    /dev/disk/by-id/ata-ST31000528AS_9VP009RT-part5
(/dev/sda5) (mounted on / as ext3)

Resume device:  /dev/disk/by-id/ata-ST31000528AS_9VP009RT-part3
(/dev/sda3)

Kernel Modules: xenbus_be pciback dock scsi_mod libata ahci hwmon
thermal_sys processor thermal fan jbd mbcache ext3 edd xennet cdrom
xenblk crc-t10dif sd_mod usbcore ohci-hcd uhci-hcd ehci-hcd ff-memless
hid usbhid 

Features:       block usb resume.userspace resume.kernel

Bootsplash:     No bootsplash for kernel flavor xen

22687 blocks

 

Everything looks fine:

 

greencity01:/home # ls -l /boot/initrd-2.6.27.7-9-xen

-rw-r--r-- 1 root root 5634405 Sep 24 11:20 /boot/initrd-2.6.27.7-9-xen

 

Except that when I reboot, no pci back module:

 

greencity01:/home # lsmod | grep pciback

greencity01:/home # 

 

Anyone have any ideas on how to correct this?

 

Thanks,

Phil

 

 



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>>> "Phil Winterfield (winterfi)" <winterfi@cisco.com>
24.09.09 20:38 >>>
>Except that when I reboot, no pci back module:
>
>greencity01:/home # lsmod | grep pciback
And there are no respective messages in /var/log/boot.msg?

Otoh I can''t see why you need this done from the initrd in the first
place...

Jan


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The solution, for those who need it, is this:

In /boot/grub/menu.lst:
title Xen -- openSUSE 11.1 - 2.6.27.7-9
    root (hd0,4)
    kernel /boot/xen.gz loglvl=all guest_loglvl=all vtd=1 iommu=1
    module /boot/vmlinuz-2.6.27.7-9-xen
root=/dev/disk/by-id/ata-ST31000528AS_9VP009RT-part5
resume=/dev/disk/by-id/ata-ST31000528AS_9VP009RT-part3 splash=silent
showopts vga=0x31d apic=debug maxcpus=8,
pciback.hide=(0000:03:00.0)(0000:03:00.1)
    module /boot/initrd-2.6.27.7-9-xen

In /etc/init.d/boot.local: 
modprobe pciback hide=''(03:00.0)(03:01.0)''
echo -n 0000:03:00.0 > sys/bus/pci/drivers/pciback/permissive
echo -n 0000:03:01.0 > sys/bus/pci/drivers/pciback/permissive

It is important to note that you now need the ''0000:'' prefix
to all of
the pci device addresses used for grub in openSUSE.  

Then the usual entry in your domain config file:

pci = [ ''03:00.0'', ''03:00.1'' ]

Cheers,
Phil

> -----Original Message-----
> From: Jan Beulich [mailto:JBeulich@novell.com]
> Sent: Friday, September 25, 2009 1:15 AM
> To: Phil Winterfield (winterfi)
> Cc: xen-devel@lists.xensource.com;
xen-users-request@lists.xensource.com
> Subject: Re: [Xen-devel] mkinitrd fails to include
''pciback'' module on
> openSUSE 11.1
> 
> >>> "Phil Winterfield (winterfi)"
<winterfi@cisco.com> 24.09.09 20:38
>>>
> >Except that when I reboot, no pci back module:
> >
> >greencity01:/home # lsmod | grep pciback
> 
> And there are no respective messages in /var/log/boot.msg?
> 
> Otoh I can''t see why you need this done from the initrd in the
first
> place...
> 
> Jan

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