[vfio-users] vfio help needed (nvidia GTX 750 Ti persistent code 43)

[Mogliii]

Hello,

Thank you for all the valuable input. However, the problem is not yet
resolved.

I specifically forced all the hyperv and clock options off so the nvidia
driver hopefully does not recognize its in a vm. However, I get the same
problem. Once the system recognized the graphics card and wants to
activate the driver, the screen goes black and I have a loss of signal.

My qemu command is (added newlines for better readability)
# ps aux | grep kvm

/usr/bin/qemu-system-x86_64 -name win81 -S
-machine pc-i440fx-utopic,accel=kvm,usb=off
-cpu host,kvm=off -bios /usr/share/ovmf/OVMF-pure-efi_win81.fd
-m 4096 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1
-uuid redacted -nographic -no-user-config -nodefaults
-chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/win81.monitor,server,nowait

-mon chardev=charmonitor,id=monitor,mode=control
-rtc base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=discard
-no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global
PIIX4_PM.disable_s4=1
-boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7
-device
ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6

-device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1
-device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2
-device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5
-drive
file=/dev/main/Win7xen,if=none,id=drive-virtio-disk0,format=raw,cache=none,aio=native
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1

-netdev tap,fd=24,id=hostnet0,vhost=on,vhostfd=25
-device
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:ab:b6:10,bus=pci.0,addr=0x4

-device usb-host,hostbus=1,hostaddr=2,id=hostdev0
-device usb-host,hostbus=5,hostaddr=2,id=hostdev1
-device usb-host,hostbus=5,hostaddr=3,id=hostdev2
-device vfio-pci,host=01:00.0,id=hostdev3,bus=pci.0,addr=0x3
-device vfio-pci,host=01:00.1,id=hostdev4,bus=pci.0,addr=0x9
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on

I can also confirm that the vfio-pci bind script is not necessary, and
that removing "allow_unsafe_interrupts" did not change anything.

I might later try switching the graphics card to bios mode.

On 9/16/2015 11:31 PM, Francesco Dicarlo wrote:
> Are you sure your qemu supports Kim hidden tag? Try setting manually
> hyperv features in features tag off and also hypervclock to off...
>
> Posting ps aux | grep kvm will help us a lot to understand :-) 
>
>>>             <hyperv>
>>>                   <relaxed state='off'/>
>>>                   <vapic state='off'/>
>>>                   <spinlocks state='off'/>
>>>                 </hyperv>
>>>               </features>
>>>
>>>               <clock offset='localtime'>
>>>                 <timer name='hypervclock' present='no'/>
>>>                 <timer name='rtc' tickpolicy='catchup'/>
>>>                 <timer name='pit' tickpolicy='delay'/>
>>>                 <timer name='hpet' present='no'/>
>>>               </clock>
>>
>
> Sent from my iPhone
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20150917/7e39139a/attachment.htm>