IGVT-g

Intel GVT-g is a full GPU virtualization solution with mediated pass-through which allows host and multiple guests to share same Intel integrated videocard. Guest gets a near-native graphics peformance.

Win7-32 / Win7-64 / Win8.1-64 /Win10-RS1-64 are validated. Install recent Intel driver into the guest.

Hardware Requirements

For client platforms, 5th, 6th or 7th Generation IntelÂ® Core Processor Graphics is required. For server platforms, E3_v4, E3_v5 or E3_v6 Xeon Processor Graphics is required.

NixOS configuration

/etc/nixos/configuration.nix

 boot.kernelPackages = pkgs.linuxPackages_4_16;
 boot.kernelParams = [ "i915.enable_gvt=1" ];
 nixpkgs.config.packageOverrides = super: let self = super.pkgs; in {
   linux_4_16 = super.linux_4_16.override {
     extraConfig = 
 # since 4.16-rc1
 DRM_I915_GVT y
 DRM_I915_GVT_KVMGT m
     ;
   };
 };
 environment.systemPackages = with pkgs; [
 virtmanager
 virt-viewer
 libossp_uuid
 ];
 virtualisation.libvirtd.enable = true;
 users.extraUsers.user.extraGroups = [ "libvirtd" ];

Create or destroy VGPU

Show mode information

$ cat /sys/bus/pci/devices/0000:00:02.0/mdev_supported_types/i915-GVTg_V5_8/description 
low_gm_size: 64MB
high_gm_size: 384MB
fence: 4
resolution: 1024x768
weight: 2

Create

# uuid
a297db4a-f4c2-11e6-90f6-d3b88d6c9525
# echo "a297db4a-f4c2-11e6-90f6-d3b88d6c9525" > "/sys/bus/pci/devices/0000:00:02.0/mdev_supported_types/i915-GVTg_V5_8/create"

Destroy

# echo 1 > /sys/bus/pci/devices/0000:00:02.0/a297db4a-f4c2-11e6-90f6-d3b88d6c9525/remove

Configure KVM

Support for local display is present in Qemu 2.12. Only BIOS (SeaBIOS) machine is supported, UEFI (OVMF) is not supported.

Bare Qemu

 qemu-system-x86_64 \
    -enable-kvm \
    -m 1G \
    -nodefaults \
    -M graphics=off \
    -serial stdio \
    -display gtk,gl=on \
    -device vfio-pci,sysfsdev=/sys/bus/mdev/devices/a297db4a-f4c2-11e6-90f6-d3b88d6c9525,x-igd-opregion=on

libvirtd

If using virt-manager, create new or open existing VM. Its impossible to remove primary QXL videocard, but it will conflict, so change it to Cirrus.

sudo -E virsh edit win10

<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<!-- ... -->
<devices>
<!-- ... -->
<graphics type='spice'>
 <listen type='none'/>
 <!-- choose renderer via virt-manager -->
 <gl enable='yes'/>
</graphics>
<hostdev mode='subsystem' type='mdev' managed='no' model='vfio-pci'>
 <source>
   <address uuid='a297db4a-f4c2-11e6-90f6-d3b88d6c9525'/>
 </source>
 <!-- assign to first available slot -->
 <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</hostdev>
</devices>
 <qemu:commandline>
  <qemu:arg value='-set'/>
  <qemu:arg value='device.hostdev0.x-igd-opregion=on'/>
 </qemu:commandline>
</domain>

Finally use sudo virt-viewer --attach win10