Re: [Xen-users] SCSI Passthrough setup within VM

["Jason Goodwin" <jason.m.goodwin@xxxxxxxxx>]

I've been setting up the same thing today. For some reason, I'm having issues getting it to work by specifying the pci = in the domU config. When I create a domain using 'xm create -c mydomU pci=12,04,01' it works. Though, that is the second port on my SCSI card and for sanity I'm pretty sure I need to be assigning both to my domU. I can't seem to get it to take both 12,04,00 and 12,04,01 at the same time.

Also, I've setup a mythTV backend as domU before. It worked fine for a while, passing the PCI tuner card through. When I added a second (different) card, I could not get that card to pass through, so I had to go back to stock Linux kernel on that machine. Too bad, it was great to have a test Xen machine at home.

Anyone else doing this lately? I was starting to wonder if my issues are SLES10 related, as I've only done Xen on Debian until now.

--
Jason

On 8/23/06, Edward L. Haletky <elh@xxxxxxxxxxxxx> wrote:

Hello,

I am trying to setup a VM that has access to a tape device so that I can
create a Virtual Machine based backup solution.

To answer a few questions:
why not use dom0: I like to keep things separate, dom0 should NOT be
doing anything but managing the server in my mind.

I am also considering making a mythTV VM as well.

Currently I have tried in /etc/rc.d/rc.local

/sbin/rmmod st sg aic7xxx
/sbin/modprobe pciback
echo -n "0000:02:03.0" > /sys/bus/pci/devices/0000\:02\:03.0/driver/unbind
for x in 0000:02:02.0 0000:02:03.0
do
    echo -n $x > /sys/bus/pci/drivers/pciback/new_slot
    echo -n $x > /sys/bus/pci/drivers/pciback/bind
done

Also in /etc/modprobe.conf I have:
options pciback permissive hide=(0000:02:02.0)(0000:02:03.0)
install aic7xxx /sbin/modprobe pciback; /sbin/modprobe --first-time
--ignore-install aic7xxx
# alias scsi_hostadapater1 aic7xxx

Inside the /etc/xen/machinename file is
pci = ['02:02.0','02:03.0']

So now the question is, while there are no errors in the logfiles, the
domU can not find the device.... lspci inside domU does not work, etc.
Is there a place I can find an aic7xxx driver for the tape device? Is
there more a cheatsheet for PCI PassThrough that covers SCSI in more
detail? Do I have to rebuild the domU kernel to get this device?

Best regards,
Edward Haletky


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