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xen-users
RE: [Xen-users] Yet Another PCI passthrough question
Thank you for the reply James,
I tried following your script, but even then something seems to be missing.
# lspci
03:00.0 VGA compatible controller: ATI Technologies Inc Device 671d
03:00.1 Audio device: ATI Technologies Inc Device aa80
04:00.0 Display controller: ATI Technologies Inc Device 671d
04:00.1 Audio device: ATI Technologies Inc Device aa80
I'm assuming at this point that <PCI-ID> is 04:00.0 and 03.00.0
# find /sys/bus/pci/drivers -name 0000:04:00.0
then returns no results.
Also, regarding modprobe pciback, I did a grep in the modules directory for the
term "pciback" and no results are shown
# grep pciback /lib/modules/2.6.37.6-0.7-xen
#
Is this indicative of something missing? I appreciate your help! I'm not trying
a scsi device, simply getting my video card to pass through.
Julien
________________________________________
Julien,
I'm using xen 4.0.2 in sles11. Below is a little "doc" I use for passing
through devices. It seems there are always different ways to do these
things, but this one does seem to work.
Btw, my experience has been that xm pci-list-assignable-devices
sometimes doesn't list anything, but we're still able to pass through.
HTH,
James
lspci to find <PCI-ID>
find /sys/bus/pci/drivers -name 0000:<PCI-ID>
echo -n "<PCI-ID>" > "/sys/bus/pci/drivers/<driver dir>/unbind"
*****(where <driver dir> is from the previous command.)
echo -n "<PCI-ID>" > "/sys/bus/pci/drivers/pciback/new_slot"
echo -n "<PCI-ID>" > "/sys/bus/pci/drivers/pciback/bind"
#Start Example:
find /sys/bus/pci/drivers -name 0000:0e:04.0
modprobe pciback
echo -n "0000:0e:04.0" > "/sys/bus/pci/drivers/mptspi/unbind"
echo -n "0000:0e:04.0" > "/sys/bus/pci/drivers/pciback/new_slot"
echo -n "0000:0e:04.0" > "/sys/bus/pci/drivers/pciback/bind"
#End Example
Edit or create /etc/init.d/after.local and add:
modprobe pciback
echo -n "0000:0e:04.0" > "/sys/bus/pci/drivers/mptspi/unbind"
echo -n "0000:0e:04.0" > "/sys/bus/pci/drivers/pciback/new_slot"
echo -n "0000:0e:04.0" > "/sys/bus/pci/drivers/pciback/bind"
Now try provisioning new VM using the hardware device or add hardware
device to existing VM.
Note:for some scsi devices such as tape drives, you may have to update
kernel boot parameters to hide the scsi card from the host OS. For
example, add the following to the modules line in /boot/grub/menu.lst
for the xen boot process:
pciback.permissive pciback.hide=(0e:04.0)(0e:04.1)
pci=resource_alignment=0e:04.0;0e:04.1
For example:
module /boot/vmlinuz-2.6.32.12-0.7-xen
root=/dev/disk/by-id/cciss-3600508b1001030364643393433300000-part2
resume=/dev/disk/by-id/cciss-3600508b1001030364643393433300000-part1
splash=silent showopts pciback.permissive pciback.hide=(0e:04.0)(0e:04.1)
pci=resource_alignment=0e:04.0;0e:04.1
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Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
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