AMD GPU Passthrough with Windows7 32bit

[netweber]

I have a new server with a X10SDV-TLN4F Xeon D mainboard running Proxmox 4.1. I am trying to get GPU passthrough working with an ATI Radeon HD 5000 and windows 7.

I have it working with the built in windows VGA drivers but it bluescreens when I load the the ATI drivers. I have seen reference to a similar problem being solved with the following line...

-device ioh3420,bus=pcie.0,id=pcie0,port=1,chassis=1,multifunction=on \

Can someone tell me how I would inject that config line into Proxmox when the VM starts?

 

[netweber]

Here is the VMID.conf file of the semi working passthrough.

boot: c[/INDENT]
bootdisk: virtio0
cores: 2
hostpci0: 04:00.0,pcie=1,multifunction=on,x-vga=on
hostpci1: 04:00.1,pcie=2
machine: q35
memory: 2048
name: backdesk-workstation
net0: e1000=00:30:48:D5:6D:02,bridge=vmbr0,tag=10
numa: 0
onboot: 1
ostype: win7
sata2: local:iso/virtio-win-0.1.112.iso,media=cdrom,size=55592K
smbios1: uuid=229ba43f-b87a-4b40-b3b7-7f39f5b3465b
sockets: 1
usb0: host=046d:c52b
vga: none
virtio0: ssdMirror_1TB:vm-111-disk-1,cache=writeback,size=90G

​

And this is the resulting KVM command line as reported by PS -aux for said vm.

/usr/bin/kvm -id 111
-chardev socket,id=qmp,path=/var/run/qemu-server/111.qmp,server,nowait
-mon chardev=qmp,mode=control
-vnc unix:/var/run/qemu-server/111.vnc,x509,password
-pidfile /var/run/qemu-server/111.pid
-daemonize
-smbios type=1,uuid=229ba43f-b87a-4b40-b3b7-7f39f5b3465b
-name backdesk-workstation
-smp 2,sockets=1,cores=2,maxcpus=2
-nodefaults
-boot menu=on,strict=on,reboot-timeout=1000
-vga none
-no-hpet
-cpu kvm64,kvm=off,+lahf_lm,+sep,+kvm_pv_unhalt,+kvm_pv_eoi,enforce
-m 2048
-k en-us
-readconfig /usr/share/qemu-server/pve-q35.cfg
-device usb-tablet,id=tablet,bus=ehci.0,port=1
-device vfio-pci,host=04:00.0,id=hostpci0,bus=ich9-pcie-port-1,addr=0x0,x-vga=on
-device vfio-pci,host=04:00.1,id=hostpci1,bus=pci.0,addr=0x11
-device usb-host,vendorid=0x046d,productid=0xc52b
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
-iscsi initiator-name=iqn.1993-08.org.debian:01:5514f02761d
-device ahci,id=ahci0,multifunction=on,bus=pci.0,addr=0x7
-drive file=/var/lib/vz/template/iso/virtio-win-0.1.112.iso,if=none,id=drive-sata2,media=cdrom,aio=threads
-device ide-drive,bus=ahci0.2,drive=drive-sata2,id=sata2
-drive file=/dev/zvol/ssdmirror/vmstorage/vm-111-disk-1,if=none,id=drive-virtio0,cache=writeback,format=raw,aio=threads,detect-zeroes=on
-device virtio-blk-pci,drive=drive-virtio0,id=virtio0,bus=pci.0,addr=0xa,bootindex=100
-netdev type=tap,id=net0,ifname=tap111i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown
-device e1000,mac=00:30:48:D5:6D:02,netdev=net0,bus=pci.0,addr=0x12,id=net0,romfile=pxe-e1000.rom
-rtc driftfix=slew,base=localtime
-machine type=q35
-global kvm-pit.lost_tick_policy=discard

 

[spirit]

please read the wiki

https://pve.proxmox.com/wiki/Pci_passthrough

best compat seem to be ovmf currently (but you need an uefi compatible rom in your amd card)

 

[spirit]

Here is the VMID.conf file of the semi working passthrough.

hostpci1: 04:00.1,pcie=2

This syntax is wrong "pcie=2" , it's 1|0 (enable|disable).
it's mandatory to have pcie=1 if machine=q35

hostpci0: 04:00.0,pcie=1,multifunction=on,x-vga=on
hostpci1: 04:00.1,pcie=2

multifunction=on is not need anymore. (don't known where you have found your example, but it seem to be quite old)

should be

hostpci0: 04:00,pcie=1,x-vga=on

you should really read the wiki

 

[netweber]

Although it may be hard to believe I did actually follow the wiki. I began deviating from the wiki in an attempt to get the ATI sourced drivers working.

This syntax is wrong "pcie=2" , it's 1|0 (enable|disable).
it's mandatory to have pcie=1 if machine=q35

I did not realize that that pcie=1 was a boolean. I didn't see anything in the wiki stating that or indicating what the pci= 1 feature is for. Thanks for clarifying that. Since I was trying to pass both the video and audio portion of my Radeon card through I added a second hostpci line for the audio device but since there is no example in the wiki mapping two devices to the VM, I was just guessing as to how the second line should be configured. Initially I did not increment the second hostpci line so I had two lines with hostpci0. This did not work and with the absence of information explaining what the various configuration arguments were doing I incremented the pcie=1 section as well.

I'll try changing the pcie=2 to pcie=1 and see if that helps.

multifunction=on is not need anymore. (don't known where you have found your example, but it seem to be quite old)

The QEMU-Devel mailing list archive is where I got this from. This post https://lists.gnu.org/archive/html/qemu-devel/2014-02/msg00753.html seemed to describe my problem exactly and that is why I was using multifunction=on. The other key piece it seemed to solving the problem was the following line.

-device ioh3420,bus=pcie.0,id=pcie0,port=1,chassis=1,multifunction=on \

That is why I would like to know how to add this config option in proxmox.

Can you help?

 

[spirit]

The QEMU-Devel mailing list archive is where I got this from. This post https://lists.gnu.org/archive/html/qemu-devel/2014-02/msg00753.html seemed to describe my problem exactly and that is why I was using multifunction=on. The other key piece it seemed to solving the problem was the following line.

-device ioh3420,bus=pcie.0,id=pcie0,port=1,chassis=1,multifunction=on \

That is why I would like to know how to add this config option in proxmox.

Can you help?

hostpci0: 04:00,pcie=1,x-vga=on

(04:00 -> will detect all functions .0 (video) , .1 (audio) -> multifunction will be enabled automaticaly)

It's in the wiki
https://pve.proxmox.com/wiki/Pci_pa...our_PCI_card_address.2C_and_configure_your_VM

 

[netweber]

It's in the wiki
https://pve.proxmox.com/wiki/Pci_pa...our_PCI_card_address.2C_and_configure_your_VM

Thanks for the clarification on this point. I was reading that as being relevant to pci not pci express. I followed the pci express passthrough section just below that.

Also, is it possible to address a pci express video card as a pci card from the VM. In other words, can I follow the pci directions even though my card is pci express?

 

[spirit]

Also, is it possible to address a pci express video card as a pci card from the VM. In other words, can I follow the pci directions even though my card is pci express?

yes. sometime is works better with pci , sometime with pciexpress (even if the physical card is always pciexpress)

they are 4 differents setup in wiki,

If you can, try ovmf method, this is the best supported method (but this need uefi comptable gpu rom)

 

[netweber]

I have tried the various iterations of the wiki configs and unfortunately none of them work with the ATI drivers. The only one I haven't tried is the OVMF method. I don't think I can use that one because my MSI R5450 card does not appear to support UEFI.

I did find this site with a link to the BIOS ROM for my card.
http://www.techpowerup.com/vgabios/...del=HD+5450&interface=PCI-E&memType=&memSize=
Does anyone have any troubleshooting advice for me?

 

[netweber]

This is my current iteration of the vmid.conf

bootdisk: virtio0
cores: 2
hostpci0: 04:00,pcie=1,x-vga=on                 
machine: q35
memory: 2048
name: backdesk-workstation
net0: e1000=00:30:48:D5:6D:02,bridge=vmbr0,tag=10
numa: 0
onboot: 1
ostype: win7
parent: Pre_ATI_Driver
sata2: local:iso/virtio-win-0.1.112.iso,media=cdrom,size=55592K
smbios1: uuid=229ba43f-b87a-4b40-b3b7-7f39f5b3465b
sockets: 1
usb0: host=046d:c52b
vga: none
virtio0: ssdMirror_1TB:vm-111-disk-1,cache=writeback,size=90G

 

[spirit]

I have tried the various iterations of the wiki configs and unfortunately none of them work with the ATI drivers. The only one I haven't tried is the OVMF method. I don't think I can use that one because my MSI R5450 card does not appear to support UEFI.

I did find this site with a link to the BIOS ROM for my card.
http://www.techpowerup.com/vgabios/...del=HD+5450&interface=PCI-E&memType=&memSize=
Does anyone have any troubleshooting advice for me?

from qemu release note, HD 5450 was supported in qemu 1.5 without ovmf.
So it working in past, maybe something has changed ? (new drivers maybe ?)