GPU passthrough

code 43 solved

https://scottlinux.com/2016/03/21/enable-hyper-v-enlightenments-in-kvm-for-better-windows-vm-performance/

Prereq

NVIDIA card in second PCIE slot (code 43 if in first slot)

Windows 10 as guest (code 43 if windows7)

cat /proc/driver/nvidia/gpus/0000\:06\:00.0/information
Model:	GeForce GTX 750 Ti
IRQ:	38
GPU UUID:	GPU-1a843395-eac3-0f8f-11f4-7edbb2a0e088
Video BIOS:	82.07.55.00.1b
Bus Type:	PCIe
DMA Size:	40 bits
DMA Mask:	0xffffffffff
Bus Location:	0000:06:00.0
Device Minor:	0

OVFM

Install ovfm

vfio vfio_iommu_type1 vfio_pci vfio_virqfd

grub

vfio-pci.ids=10de:1380,10de:0fbc amd_iommu=on text systemd.unit=multi-user.target usbcore.autosuspend=-1 elevator=noop

update-initramfs -u

libvirt

Create VM and customize configuration before start:

firmware to “UEFI” and Q35 BIOS

CPU model to “host-passthrough”

CPU pinning

QXL video card and SPICE server does not cause “code 43”

hyperv make a huge improvement and does not cause “code 43”

hidden state='on' is necessary to avoid “code 43”

<domain type='kvm'>
<name>winz</name>
<uuid>aeb4ed7e-6281-4d57-8cba-78a1622783b3</uuid>
<memory unit='KiB'>6242304</memory>
<currentMemory unit='KiB'>6242304</currentMemory>
<vcpu placement='static'>6</vcpu>
<cputune>
<vcpupin vcpu='0' cpuset='0'/>
<vcpupin vcpu='1' cpuset='2'/>
<vcpupin vcpu='2' cpuset='4'/>
<vcpupin vcpu='3' cpuset='1'/>
<vcpupin vcpu='4' cpuset='3'/>
<vcpupin vcpu='5' cpuset='5'/>
</cputune>
<os>
<type arch='x86_64' machine='pc-q35-2.6'>hvm</type>
<loader readonly='yes' type='pflash'>/usr/share/OVMF/OVMF_CODE.fd</loader>
<nvram>/var/lib/libvirt/qemu/nvram/winz_VARS.fd</nvram>
<bootmenu enable='no'/>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
<vendor_id state='on' value='123456789ab'/>
</hyperv>
<kvm>
<hidden state='on'/>
</kvm>
</features>
<cpu mode='host-passthrough'>
<topology sockets='1' cores='3' threads='2'/>
</cpu>
<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>restart</on_crash>
<pm>
<suspend-to-mem enabled='no'/>
<suspend-to-disk enabled='no'/>
</pm>
<devices>
<emulator>/usr/bin/kvm-spice</emulator>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='native'/>
<source dev='/dev/zvol/rpool/winz'/>
<target dev='vda' bus='virtio'/>
<boot order='1'/>
<address type='pci' domain='0x0000' bus='0x02' slot='0x04' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/storage/software/windows/Win10_1607_Italian_x64.iso'/>
<target dev='sda' bus='sata'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/var/lib/libvirt/images/virtio-win.iso'/>
<target dev='sdb' bus='sata'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
<controller type='usb' index='0' model='ich9-ehci1'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x7'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<master startport='0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x0' multifunction='on'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<master startport='2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x1'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<master startport='4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x2'/>
</controller>
<controller type='sata' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
</controller>
<controller type='pci' index='0' model='pcie-root'/>
<controller type='pci' index='1' model='dmi-to-pci-bridge'>
<model name='i82801b11-bridge'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1e' function='0x0'/>
</controller>
<controller type='pci' index='2' model='pci-bridge'>
<model name='pci-bridge'/>
<target chassisNr='2'/>
<address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</controller>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x02' slot='0x03' function='0x0'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:3f:38:9e'/>
<source bridge='br-eth'/>
<model type='rtl8139'/>
<address type='pci' domain='0x0000' bus='0x02' slot='0x01' function='0x0'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<channel type='spicevmc'>
<target type='virtio' name='com.redhat.spice.0'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='tablet' bus='usb'>
<address type='usb' bus='0' port='1'/>
</input>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='spice' autoport='yes'>
<listen type='address'/>
</graphics>
<sound model='ich6'>
<address type='pci' domain='0x0000' bus='0x02' slot='0x02' function='0x0'/>
</sound>
<video>
<model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
</video>
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x046d'/>
<product id='0xc52b'/>
</source>
<address type='usb' bus='0' port='4'/>
</hostdev>
<hostdev mode='subsystem' type='pci' managed='yes'>
<source>
<address domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
</source>
<address type='pci' domain='0x0000' bus='0x02' slot='0x06' function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='pci' managed='yes'>
<source>
<address domain='0x0000' bus='0x06' slot='0x00' function='0x1'/>
</source>
<address type='pci' domain='0x0000' bus='0x02' slot='0x07' function='0x0'/>
</hostdev>
<redirdev bus='usb' type='spicevmc'>
<address type='usb' bus='0' port='2'/>
</redirdev>
<redirdev bus='usb' type='spicevmc'>
<address type='usb' bus='0' port='3'/>
</redirdev>
<memballoon model='none'/>
</devices>
</domain>