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Re: [Xen-users] PCI Passthrough, Radeon 7950 and Windows 7 64-bit


I've got a similar setup :

core i7-3770 + ASRock z77 pro 4M
and a sapphire radeon HD7950

Ubuntu 12.04 as Dom0, and Win8 release preview as HVM guest.

I can start my VM multiple time without issue.
as I have 3 USB controller and 2 SATA controller, I use pci passthrough to pass USB and SATA devices too
so my razer mouse, and secondary sata drive is "native" on windows too.

here is my script (copied from someone) to reserve the PCI devices for my HVM :

remove_device () {
# Unbind a PCI function from its driver as necessary
[ ! -e /sys/bus/pci/devices/$BDF/driver/unbind ] || \
        echo -n $BDF > /sys/bus/pci/devices/$BDF/driver/unbind
# Add a new slot to the PCI Backend's list
echo -n $BDF > /sys/bus/pci/drivers/pciback/new_slot
# Now that the backend is watching for the slot, bind to it
echo -n $BDF > /sys/bus/pci/drivers/pciback/bind

#USB Controller :
remove_device "0000:00:1a.0"
#SATA Controller :
remove_device "0000:04:00.0"
#Radeon 7950
remove_device "0000:01:00.0"
#Radeon 7950 audio
remove_device "0000:01:00.1"

and here is my .cfg file to launch the VM (xm create win8_lan.cfg) :
cat win8_lan.cfg
memory = 8096
name = "win8_new"
vif = [ 'type=ioemu, bridge=br0' ]
disk = ['file:/xen-images/win8_2.img,ioemu:hda,w']
acpi = 1
pci=[ '00:1a.0', '01:00.0', '01:00.1', '04:00.0' ]

hope it helps



On 06/25/2012 05:32 PM, Radoslaw Szkodzinski wrote:
On Mon, Jun 25, 2012 at 5:21 PM, Matthias
<matthias.kannenberg@xxxxxxxxxxxxxx> wrote:
Maybe you should give xm a try just to see if it does the trick. I
never got vga passthrough working with xl (and from my understanding,
it's a lot mor complicated there with compiling the vga bios into xen
and manual calculating vga adress ranges.. with xm, I'm doing neither
of it).
Why? I'm not using the VGA Passthrough, The card is set up as a secondary.
That shouldn't need any VGA BIOS. Also, it works fine for the first
boot very well!

The problem occurs on the second start of the same VM.

Also, do you increase the log level for xen? my kernel line is:
multiboot /boot/xen.gz dom0_mem=2048M iommu=1 loglvl=all guest_loglvl=all
Will do. (except dom0_mem)

What kernel are you using? If you want i can provide my build commands
for the xen-patched openSuse Kernel..
I don't want to use the XenLinux kernel. PVOps only please.
Unless the Xen kernel is actually Pvops-based, in which case why would
I want to use OpenSUSE one instead of vanilla?

As I've mentioned, vanilla 3.4.1.

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