[Qemu-discuss] Nvidia gpu passthrough fail with code 43

[John Y.]

I got code 43 in the guest when I use kvm pci passthrough with nvidia gt 620.

It worked fine with AMD gpu.

I had tried to add "-cpu host,kvm=off,hv_vendor_id=123456789ab" and it did not work for me.

The version of nividia driver is 376.33.

Does nvidia use some new detect method to check if the os is kvm?

How can I spoof it ? 

Or do I used in a wrong way?

Infomation of my host:

Version of qemu

QEMU emulator version 2.5.1.1, Copyright (c) 2003-2008 Fabrice Bellard

kernel:

Linux ns.mqcache.net 4.2.0-1.el7.elrepo.x86_64 #1 SMP Sun Aug 30 21:25:29 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux

qemu cmd:

/usr/bin/qemu-system-x86_64 \

-name i-gputest \

-machine q35,accel=kvm,usb=off \

-cpu host,kvm=off,hv_vendor_id=123456789ab \

-m 2048 \

-realtime mlock=off \

-smp 2,sockets=1,cores=2,threads=1 \

-no-user-config \

-nodefaults  \

-rtc base=localtime \

-no-shutdown \

-boot strict=on \

-device i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1e \

-device pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x1 \

-drive file=/root/gpuvm/image.qcow2,if=none,id=drive-virtio-disk0,format=qcow2 \

-device virtio-blk-pci,scsi=off,bus=pci.2,addr=0x2,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \

-spice port=6000,addr=0.0.0.0,disable-ticketing,seamless-migration=on \

-k en-us \

-device virtio-balloon-pci,id=balloon0,bus=pci.2,addr=0x4 \

-machine smm=off \

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

-device vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on \

-device vfio-pci,host=01:00.1,bus=root.1,addr=00.1 \

-msg timestamp=on \

-vga cirrus \

-net nic,model=virtio -net tap,ifname=tap1,script=/root/gpuvm/qemu-ifup.sh,downscript=/root/gpuvm/qemu-ifdown.sh

Regards

John