[ovirt-users] How to passthrough GPU to windows guest

[yimao]

Thanks for your suggestions, I have tried that but problems still
exist. Yes, I used Nvidia GTX 750Ti.

I found the qemu's arguments have changed.

    7210 ?        SLl    0:31 /usr/libexec/qemu-kvm -name
guest=win7_1,debug-threads=on -S -object
secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-16-win7_1/master-key.aes
-machine pc-i440fx-rhel7.3.0,accel=kvm,usb=off -cpu
Broadwell,+rtm,+hle,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,hv_vendor_id=whatever,kvm=off
-m size=1048576k,slots=16,maxmem=4194304k -realtime mlock=off -smp
1,maxcpus=16,sockets=16,cores=1,threads=1 -numa
node,nodeid=0,cpus=0,mem=1024 -uuid
1fba3bd6-0659-4463-92ea-8efa43411082 -smbios
type=1,manufacturer=oVirt,product=oVirt
Node,version=7-3.1611.el7.centos,serial=031B021C-040D-050E-D806-900700080009,uuid=1fba3bd6-0659-4463-92ea-8efa43411082
-no-user-config -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-16-win7_1/monitor.sock,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc
base=2017-03-28T08:54:41,driftfix=slew -global
kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -boot strict=on
-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device
virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x8 -device
virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=0x4
-drive if=none,id=drive-ide0-1-0,readonly=on -device
ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive
file=/rhev/data-center/00000001-0001-0001-0001-000000000311/c053a0c0-45ad-4f7a-b9ce-c1ac90c900d4/images/082d4d4c-3aae-4369-9cbb-e6a7b31c3204/63da97f3-7b1f-406b-905f-b12eeb96d55f,format=raw,if=none,id=drive-scsi0-0-0-0,serial=082d4d4c-3aae-4369-9cbb-e6a7b31c3204,cache=none,werror=stop,rerror=stop,aio=threads
-device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1
-netdev tap,fd=33,id=hostnet0,vhost=on,vhostfd=35 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=00:1a:4a:16:01:51,bus=pci.0,addr=0x3
-chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channels/1fba3bd6-0659-4463-92ea-8efa43411082.com.redhat.rhevm.vdsm,server,nowait
-device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.rhevm.vdsm
-chardev socket,id=charchannel1,path=/var/lib/libvirt/qemu/channels/1fba3bd6-0659-4463-92ea-8efa43411082.org.qemu.guest_agent.0,server,nowait
-device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,name=org.qemu.guest_agent.0
-device usb-tablet,id=input0,bus=usb.0,port=1 -vnc
192.168.120.235:0,password -k en-us -device
qxl-vga,id=video0,ram_size=67108864,vram_size=8388608,vram64_size_mb=0,vgamem_mb=16,bus=pci.0,addr=0x2
-device vfio-pci,host=01:00.0,id=hostdev0,bus=pci.0,addr=0x6 -device
vfio-pci,host=01:00.1,id=hostdev1,bus=pci.0,addr=0x7 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -object
rng-random,id=objrng0,filename=/dev/urandom -device
virtio-rng-pci,rng=objrng0,id=rng0,bus=pci.0,addr=0x9 -msg
timestamp=on

Does ovirt use vga passthrough or gpu passthrough? Should I install EDK2 OVMF?

Thanks in advance.

2017-03-28 15:17 GMT+08:00 Martin Polednik <mpolednik at redhat.com>:
> On 28/03/17 02:12 +0800, yimao wrote:
>>
>> Hi,
>>
>> I'm trying to passthrough gpu card to windows 7 guest, but I got the
>> error code 43.
>> I use ovirt node: ovirt-node-ng-installer-ovirt-4.1-2017032304.iso and
>> ovirt-engine-appliance-4.1-20170322.1.el7.centos.noarch.rpm
>> I have added  options "intel_iommu=on rdblacklist=nouveau
>> pci-stub.ids=10de:1380,10de:0fbc" to the grub.conf and attached these
>> devices to the guest. After I have installed the gpu's driver, I got
>> the error code 43.
>> Did I miss something? Any pointers or suggestions would be greatly
>> appreciated.
>
>
> You are most likely using consumer grade GPU that errors out in
> Windows if it's running under virtualized environment. You could try
> using the following hook (make sure it's in
> /usr/libexec/vdsm/hooks/before_vm_start and it's executable bit is set
> (chmod +x ...)).
>
> Just copy paste the following block to a bash and try to start the VM
> again.
>
> cd /usr/libexec/vdsm/hooks/before_vm_start
> cat << EOF >> 99_mask_kvm
> #!/usr/bin/python2
>
> import hooking
> domxml = hooking.read_domxml()
>
> hyperv = domxml.getElementsByTagName('hyperv')[0]
> smm = domxml.createElement('vendor_id')
> smm.setAttribute('state', 'on')
> smm.setAttribute('value', 'whatever')
> hyperv.appendChild(smm)
>
> features = domxml.getElementsByTagName('features')[0]
> kvm = domxml.createElement('kvm')
> hidden = domxml.createElement('hidden')
> hidden.setAttribute('state', 'on')
> kvm.appendChild(hidden)
> features.appendChild(kvm)
>
> hooking.write_domxml(domxml)
> EOF
> chmod +x 99_mask_kvm
>
>
>
>> Thanks in advance.
>> Yiimao Yang.