[vfio-users] Cannot fix Error 43 for GTX 680 passed through to win 10 guest

[root at yoshi.dynu.com]

i am a bit stuck it seems...

i build qemu as well als libvirt from git and even rebuild initramfs 
afterwards.

still, when trying to start the machine with the specified parameter it 
get:

QEMU 2.4.50 monitor - type 'help' for more information
(qemu) qemu-system-x86_64: Property '.hv-vendor-id' not found

line with parameter reads:

-cpu host,kvm=off,hv_vendor_id=deadbeef


versions of qemu and libvirt:

[arne at Bowser ~]$ libvirtd --version
libvirtd (libvirt) 1.2.21
[arne at Bowser ~]$ qemu-system-x86_64 --version
QEMU emulator version 2.4.50, Copyright (c) 2003-2008 Fabrice Bellard

sorry for obviously being noobish.

Cheers