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Considering that Xen’s gpu passthrough is about one year ahead of kvm, so let us try that.
The process is something like kvm one as I wrote before.
KVM GPU-Passthrough, VGA-Passthrough
Result:
I failed in trying passthrough the graphic card to Win7 or XP.
Now I’m try some patchs and re-compile Xen with my graphic card bios.bin.
HOST:
CPU: i5-3470
GPU: ATI Radeon HD 7850
OS: openSuse 12.3 KDE
0. Disable Radeon Driver
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# echo "blacklist radeon" >> /etc/modprobe.d/modprobe.conf
# mkinitrd
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1. Install Xen-utils
Install Xen and its utilities via Yast.
2. Modify grub.cfg
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...
echo 'Loading Xen 4.3.0_06-1.3 ...'
multiboot /xen-4.3.0_06-1.3.gz placeholder iommu=1
echo 'Loading Linux 3.10.1-3.g0cd5432-xen ...'
module /vmlinuz-3.10.1-3.g0cd5432-xen placeholder root=UUID=da6ac064-2a5e-48c7-8834-307cbcb551c3 ro resume=/dev/disk/by-id/ata-ST500DM002-1BD142_Z3THR3V3-part3 splash=silent quiet showopts xen-pciback.hide=(00:00.0)(01:00.1)
echo 'Loading initial ramdisk ...'
module /initrd-3.10.1-3.g0cd5432-xen
...
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Then reboot the host.
3. Bind the device
Using Scripts
File: bind_lib.sh
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#!/bin/bash
#
# License: GPLv2
# Author: Peter Maloney
#
# Script to bind devices to pciback (or pci-stub)
find_new_id() {
device="$1"
len=${#device}
if [ "$len" -eq 12 ]; then
device="${device:5:12}"
fi
lspci -n | grep "${device}" | cut -d' ' -f3 | sed -r "s/:/ /"
}
bindstub() {
device="$1"
echo "binddevice $device"
if [ ! -e "/sys/bus/pci/devices/$device" ]; then
echo " ERROR: Device does not exist... cancelling"
return
fi
# with pci-stub, you do new_id, then unbind, then bind
echo "create new_id"
chmod +w /sys/bus/pci/drivers/pci-stub/new_id
new_id="$(find_new_id "$device")"
echo " echo \"$new_id\" > /sys/bus/pci/drivers/pci-stub/new_id"
echo "$new_id" > /sys/bus/pci/drivers/pci-stub/new_id
echo "unbind"
if [ ! -e "/sys/bus/pci/devices/$device/driver" ]; then
echo " no driver to unbind"
else
chmod +w "/sys/bus/pci/devices/${device}/driver/unbind"
echo " echo -n \"$device\" > \"/sys/bus/pci/devices/$device/driver/unbind\""
echo -n "$device" > "/sys/bus/pci/devices/$device/driver/unbind"
fi
echo "bind"
chmod +w /sys/bus/pci/drivers/pci-stub/bind
echo " echo -n \"$device\" > /sys/bus/pci/drivers/pci-stub/bind"
echo -n "$device" > /sys/bus/pci/drivers/pci-stub/bind
echo
}
bindback() {
device="$1"
echo "binddevice $device"
if [ ! -e "/sys/bus/pci/devices/$device" ]; then
echo "ERROR: Device does not exist... cancelling"
return
fi
# with pciback, you do unbind, then new_slot, then bind
echo "unbind"
if [ ! -e "/sys/bus/pci/devices/$device/driver" ]; then
echo " no driver to unbind"
else
chmod +w "/sys/bus/pci/devices/${device}/driver/unbind"
echo " echo -n \"$device\" > \"/sys/bus/pci/devices/$device/driver/unbind\""
echo -n "$device" > "/sys/bus/pci/devices/$device/driver/unbind"
fi
echo "create new_slot"
chmod +w /sys/bus/pci/drivers/pciback/new_slot
echo " echo -n \"$device\" > /sys/bus/pci/drivers/pciback/new_slot"
echo -n "$device" > /sys/bus/pci/drivers/pciback/new_slot
echo "bind"
chmod +w /sys/bus/pci/drivers/pciback/bind
echo " echo -n \"$device\" > /sys/bus/pci/drivers/pciback/bind"
echo -n "$device" > /sys/bus/pci/drivers/pciback/bind
echo
}
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# source bind_lib.sh
# modprobe xen-pciback
# bindback "0000:01:00.0"
# bindback "0000:01:00.1"
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Using xen-tools
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# xl pci-assignable-add 01:00.0
# xl pci-assignable-add 01:00.1
# xl pci-attach Domain-0 01:00.0
# xl pci-attach Domain-0 01:00.1
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4. Create VM
File: win7
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name="win77"
description="None"
uuid="db64c1a6-1f84-4eff-48df-53c4b03b389e"
memory=2048
maxmem=2048
vcpus=4
on_poweroff="destroy"
on_reboot="destroy"
on_crash="destroy"
localtime=1
builder="hvm"
device_model="/usr/lib/xen/bin/qemu-dm"
kernel="/usr/lib/xen/boot/hvmloader"
boot="dc"
disk=[ 'file:/var/lib/xen/images/windowsvistax64/disk0.raw,hda,w','file:/home/lofyer/Driver.iso,hdc:cdrom,r' ]
#vif=[ 'bridge=virbr0, mac=00:12:3e:6c:2f:02, model=rtl8139' ]
stdvga=1
vnc=1
vnclisten="0.0.0.0"
vncconsole=0
#vncunused=1
soundhw="all"
monitor=1
viridian=1
sdl=0
#usb=1
acpi=1
apic=1
pae=1
#usbdevice='tablet'
serial="pty"
# Add by lofyer
device_model_version = "qemu-xen-traditional"
gfx_passthru=0
pci_power_mgmt=1
xen_platform_pci=1
pci_msitranslate=1
hap=1
pci = [ '01:00.0' , '01:00.1' ]
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# xl create win7
# remote-viewer vnc://localhost:5900
Then you should see Windows boot logo in vnc for few seconds, after that it will switch to the second monitor that attached to your ATI card.
gfx_gpupassthru
As Xen wiki said:
When you specify “gfx_passthru=1” the passthru graphics card will be made the primary graphics card in the VM, and the Xen Qemu-dm emulated Cirrus graphics card is disabled.
If you use “gfx_passthru=0”, or don’t have gfx_passthru= option at all, then the Xen Qemu-dm emulated Cirrus graphics card will be the primary in the VM, and the passthru graphics card will be secondary.
So, alter gfx_passthru to 1.