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Skipping Nvidia GPU fails with code 43

I am currently trying to transfer the nvidia GPU for Windows 10 using qemu 2.5 and libvirt 1.3.5.

I see "Error 43" on the Nvidia GPU in Device Manager.

I tried to hide the hypervisor by adding "kvm = off" and "hv_vendor_id = 123456780ab", but this does not work for me. I searched on google and people solved the problem this way.

And I also saw a virtual machine: Yes in the task manager.

  • Did I use the wrong way? I can transfer AMD gpu to a Windows guest (AMD does not check kvm virtualization).

  • Can nvidia be fooled in another way?

My system info:

#uname -a
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

#/root/qemu25/qemu/x86_64-softmmu/qemu-system-x86_64 --version
QEMU emulator version 2.5.1.1, Copyright (c) 2003-2008 Fabrice Bellard

GPU:

02:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 620 OEM] (rev a1)
02:00.1 Audio device: NVIDIA Corporation GF119 HDMI Audio Controller (rev a1)

libvirt.xml

<domain xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0" type="kvm">  
  <name>win10</name>  
  <os> 
    <type machine="q35">hvm</type>  
    <boot dev="hd"/>  
    <boot dev="cdrom"/> 
  </os>  
  <features> 
    <acpi/>  
    <apic/>  
    <hyperv>
      <vendor_id state='on' value='1234567890ab'/>
    </hyperv>
    <kvm>
      <hidden state='on'/>
    </kvm>
  </features>   
  <clock offset="localtime"> 
    <timer name="rtc" tickpolicy="catchup"/>  
    <timer name="pit" tickpolicy="delay"/>  
    <timer name="hpet" present="no"/> 
    <timer name='hypervclock' present='yes'/>
  </clock>  
  <on_poweroff>destroy</on_poweroff>  
  <on_reboot>restart</on_reboot>  
  <on_crash>destroy</on_crash>  
  <vcpu current="4">4</vcpu>  
  <cpu mode="host-passthrough"> 
    <topology sockets="1" cores="4" threads="1"/> 
  </cpu>  
  <memory>8388608</memory>  
  <currentMemory>8388608</currentMemory>  
  <devices> 
    <emulator>/root/qemu25/qemu/x86_64-softmmu/qemu-system-x86_64</emulator>  
    <disk device="disk" type="file"> 
      <driver name="qemu" type="qcow2"/>  
      <source file="/root/vm/win10/image.qcow2"/>  
      <target bus="virtio" dev="vda"/> 
    </disk>  
    <sound model="ac97"/>  
    <interface type="bridge"> 
      <mac address="fa:16:3e:81:00:03"/>  
      <source bridge="eucabr"/>  
      <model type="virtio"/>  
      <driver name="qemu"/>  
      <alias name="net0"/> 
    </interface>  
    <hostdev mode="subsystem" type="pci" managed="yes"> 
      <source> 
        <address domain="0x0000" bus="0x02" slot="0x00" function="0x1"/>
      </source> 
    </hostdev> 
  </devices>  
  <qemu:commandline> 
    <qemu:arg value="-machine"/>  
    <qemu:arg value="smm=off"/>  
    <qemu:arg value="-device"/>  
    <qemu:arg value="ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1"/>  
    <qemu:arg value="-device"/>  
    <qemu:arg value="vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on"/>  
    <qemu:arg value="-vga"/>  
    <qemu:arg value="none"/>  
  </qemu:commandline> 
</domain>

Qemu team

/root/qemu25/qemu/x86_64-softmmu/qemu-system-x86_64 \
-name win10 \
-machine q35,accel=kvm,usb=off \
-cpu host,kvm=off,hv_relaxed,hv_spinlocks=0x1fff,hv_vapic,hv_time,hv_vendor_id=blah \
-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/vm/win10/snap.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 \
-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=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on \
-device vfio-pci,host=02:00.1,bus=root.1,addr=00.1 \
-msg timestamp=on \
-vga none

Look forward to your help!

+4
2

.

  • GPU,
    . BIOS passthrough GPU
  • pci-e .
  • lspci -v. .

  • :

    # echo "0000:05:00.0" > /sys/bus/pci/drivers/vfio-pci/unbind
# cd /sys/bus/pci/devices/0000\:05\:00.0
# echo 1 > rom 
# cat rom > /home/username/KVM/evga_gtx970.dump
# echo 0 > rom
# echo "0000:05:00.0" > /sys/bus/pci/drivers/vfio-pci/bind

    0000: 05: 00.0 PCI-. , .

  • ROM https://github.com/awilliam/rom-parser. :

    # ./rom-parser evga_gtx970.dump
Valid ROM signature found @0h, PCIR offset 1a0h
        PCIR: type 0 (x86 PC-AT), vendor: 10de, device: 13c2, class: 030000
        PCIR: revision 0, vendor revision: 1
Valid ROM signature found @f400h, PCIR offset 1ch
        PCIR: type 3 (EFI), vendor: 10de, device: 13c2, class: 030000
        PCIR: revision 3, vendor revision: 0
                EFI: Signature Valid, Subsystem: Boot, Machine: X64
Last image

    EFI, -EFI x86 ROM ( , )

  • GTX 1070 .

  • VM xml GPU ( GPU ), . = '///'. :

    <hostdev mode='subsystem' type='pci' managed='yes'>
  <source>
    <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
  </source>
  <rom bar='on' file='/home/username/KVM/evga_gtx970.dump'/>
  <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</hostdev>

    , BIOS , .

, OVMF (EFI), SeaBIOS .

+3

OVMF - UEFI, , , UEFI , ~ 2014.

, (GTX 770), , , ( ROM ) 2 , . UEFI ROM .

, , UEFI romfile=. , , UEFI .

+1

Source: https://habr.com/ru/post/1665117/

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