IGVT-g: Difference between revisions

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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~~.

Intel GVT-g is a technology that allows to "slice" an Intel GPU into virtualized GPUs that can be then passed into virtual machines.

~~Win7~~-~~32 / Win7~~-~~64 / Win8~~.1-~~64 /Win10-RS1-64 are validated~~.

Note that Intel GVT-g only supports Intel Broadwell (5th gen) to Comet Lake (10th gen), where in 10th gen support for IVGT-g was removed. For 11th gen, and 12th gen, there is SR-IOV coming up for virtualized GPUs, but that did not yet arrive in Linux mainline.

== ~~Hardware Requirements~~ ==

== Configuring GPU ==

~~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.~~

First, enable iGVT-g with:

=~~= Select VGPU devices ==~~

{{file|/etc/nixos/configuration.nix|nix|<nowiki>

virtualisation.kvmgt.enable = true;

</nowiki>}}

... then rebuild and reboot.

~~Enable iGVT-g with~~ {{file|/etc/nixos/configuration.nix|nix|<nowiki>

~~virtualisation~~.~~kvmgt.enable~~ = ~~true~~;

After rebooting, check if the driver was successfully loaded:

</nowiki>}}

then rebuild and reboot. ~~Choose virtual~~ GPU

$ ls /sys/bus/pci/devices/0000:00:02.0/mdev_supported_types/

... if you get <code>No such file or directory</code>, it means you might be using an older CPU that needs an extra configuration option:

{{file|/etc/nixos/configuration.nix|nix|<nowiki>

boot.extraModprobeConfig = "options i915 enable_guc=2";

</nowiki>}}

... then rebuild and reboot once again (unless that previous <code>ls</code> succeeded, in which case you don't have to modify that <code>extraModprobeConfig</code> at all).

Now, using <code>ls</code> you can list which variants your Intel GPU is able to virtualise:

$ ls /sys/bus/pci/devices/0000:00:02.0/mdev_supported_types/

i915-GVTg_V5_4/ i915-GVTg_V5_8/

E.g.:

$ cat /sys/bus/pci/devices/0000:00:02.0/mdev_supported_types/i915-GVTg_V5_8/description

Line 24:

Line 39:

weight: 2

~~Generate~~ UUID

Find some variant that matches your expectations (resolution, memory size etc.), note down its name, generate a random UUID:

# If you're using Nix Flakes:

$ nix shell nixpkgs#libossp_uuid -c uuid

a297db4a-f4c2-11e6-90f6-d3b88d6c9525

# If you're not using Nix Flakes:

$ nix run nixpkgs.libossp_uuid -c uuid

a297db4a-f4c2-11e6-90f6-d3b88d6c9525

~~== NixOS~~ configuration ==

... and add that variant's name into your configuration:

{{file|/etc/nixos/configuration.nix|nix|<nowiki>

virtualisation.kvmgt.enable = true;

virtualisation.kvmgt.vgpus = {

"i915-GVTg_V5_8" = {

uuid = [ "a297db4a-f4c2-11e6-90f6-d3b88d6c9525" ];

};

environment.systemPackages = with pkgs; [

};

environment.systemPackages = with pkgs; [

virtmanager

];

virtualisation.libvirtd.enable = true;

users.extraUsers.user.extraGroups = [ "libvirtd" ];

virtualisation.libvirtd.enable = true;

users.extraUsers.user.extraGroups = [ "libvirtd" ];

</nowiki>}}

== ~~Configure KVM~~ ==

Rebuild & voilá - your virtualized GPU is ready; now you just have to attach it to some virtual machine.

== Attaching GPU ==

=== Bare Qemu ===

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-device vfio-pci,sysfsdev=/sys/bus/mdev/devices/'''a297db4a-f4c2-11e6-90f6-d3b88d6c9525''',display=on,x-igd-opregion=on,driver=vfio-pci-nohotplug,ramfb=on,xres=1920,yres=1080

=== ~~libvirtd~~ ===

=== libvirt ===

If using virt-manager, create new or open existing VM. Change existing <code><graphics></code> and <code><video></code> sections.

@@ Line 1: / Line 1: @@
-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.
+Intel GVT-g is a technology that allows to "slice" an Intel GPU into virtualized GPUs that can be then passed into virtual machines.
-Win7-32 / Win7-64 / Win8.1-64 /Win10-RS1-64 are validated.
+Note that Intel GVT-g only supports Intel Broadwell (5th gen) to Comet Lake (10th gen), where in 10th gen support for IVGT-g was removed. For 11th gen, and 12th gen, there is SR-IOV coming up for virtualized GPUs, but that did not yet arrive in Linux mainline.
-== Hardware Requirements ==
+== Configuring GPU ==
-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.
+First, enable iGVT-g with:
-== Select VGPU devices ==
+{{file|/etc/nixos/configuration.nix|nix|<nowiki>
+virtualisation.kvmgt.enable = true;
+</nowiki>}}
+... then rebuild and reboot.
-Enable iGVT-g with {{file|/etc/nixos/configuration.nix|nix|<nowiki>
-  virtualisation.kvmgt.enable = true;
+After rebooting, check if the driver was successfully loaded:
-</nowiki>}}
-then rebuild and reboot. Choose virtual GPU
+  $ ls /sys/bus/pci/devices/0000:00:02.0/mdev_supported_types/
+... if you get <code>No such file or directory</code>, it means you might be using an older CPU that needs an extra configuration option:
+{{file|/etc/nixos/configuration.nix|nix|<nowiki>
+boot.extraModprobeConfig = "options i915 enable_guc=2";
+</nowiki>}}
+... then rebuild and reboot once again (unless that previous <code>ls</code> succeeded, in which case you don't have to modify that <code>extraModprobeConfig</code> at all).
+Now, using <code>ls</code> you can list which variants your Intel GPU is able to virtualise:
    $ ls /sys/bus/pci/devices/0000:00:02.0/mdev_supported_types/
    i915-GVTg_V5_4/  i915-GVTg_V5_8/
+E.g.:
    $ cat /sys/bus/pci/devices/0000:00:02.0/mdev_supported_types/i915-GVTg_V5_8/description
@@ Line 24: / Line 39: @@
    weight: 2
-Generate UUID
+Find some variant that matches your expectations (resolution, memory size etc.), note down its name, generate a random UUID:
+  # If you're using Nix Flakes:
+  $ nix shell nixpkgs#libossp_uuid -c uuid
+  a297db4a-f4c2-11e6-90f6-d3b88d6c9525
+  # If you're not using Nix Flakes:
    $ nix run nixpkgs.libossp_uuid -c uuid
    a297db4a-f4c2-11e6-90f6-d3b88d6c9525
-== NixOS configuration ==
+... and add that variant's name into your configuration:
 {{file|/etc/nixos/configuration.nix|nix|<nowiki>
-  virtualisation.kvmgt.enable = true;
+virtualisation.kvmgt.enable = true;
-  virtualisation.kvmgt.vgpus = {
+virtualisation.kvmgt.vgpus = {
-    "i915-GVTg_V5_8" = {
+  "i915-GVTg_V5_8" = {
-      uuid = [ "a297db4a-f4c2-11e6-90f6-d3b88d6c9525" ];
+    uuid = [ "a297db4a-f4c2-11e6-90f6-d3b88d6c9525" ];
-    };
    };
-  environment.systemPackages = with pkgs; [
+};
+environment.systemPackages = with pkgs; [
    virtmanager
-  ];
+];
-  virtualisation.libvirtd.enable = true;
-  users.extraUsers.user.extraGroups = [ "libvirtd" ];
+virtualisation.libvirtd.enable = true;
+users.extraUsers.user.extraGroups = [ "libvirtd" ];
 </nowiki>}}
-== Configure KVM ==
+Rebuild & voilá - your virtualized GPU is ready; now you just have to attach it to some virtual machine.
+== Attaching GPU ==
 === Bare Qemu ===
@@ Line 56: / Line 80: @@
       -device vfio-pci,sysfsdev=/sys/bus/mdev/devices/'''a297db4a-f4c2-11e6-90f6-d3b88d6c9525''',display=on,x-igd-opregion=on,driver=vfio-pci-nohotplug,ramfb=on,xres=1920,yres=1080
-=== libvirtd ===
+=== libvirt ===
 If using virt-manager, create new or open existing VM. Change existing <code><graphics></code> and <code><video></code> sections.