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Merge pull request #82468 from Mic92/kvmgt

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nixos/kvmgt: udev rules + fix module initialisation
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Jörg Thalheim 2020-03-14 07:17:28 +00:00 committed by GitHub
parent 6dcb71ecc1 505d241ee3
commit 4a8a014be4
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1 changed files with 8 additions and 8 deletions
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16
nixos/modules/virtualisation/kvmgt.nix
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@ -19,7 +19,8 @@ in {
virtualisation.kvmgt = { virtualisation.kvmgt = {
enable = mkEnableOption '' enable = mkEnableOption ''
KVMGT (iGVT-g) VGPU support. Allows Qemu/KVM guests to share host's Intel integrated graphics card. KVMGT (iGVT-g) VGPU support. Allows Qemu/KVM guests to share host's Intel integrated graphics card.
Currently only one graphical device can be shared Currently only one graphical device can be shared. To allow users to access the device without root add them
to the kvm group: <literal>users.extraUsers.&lt;yourusername&gt;.extraGroups = [ "kvm" ];</literal>
''; '';
# multi GPU support is under the question # multi GPU support is under the question
device = mkOption { device = mkOption {
@ -35,9 +36,7 @@ in {
and find info about device via <command>cat /sys/bus/pci/devices/*/mdev_supported_types/i915-GVTg_V5_4/description</command> and find info about device via <command>cat /sys/bus/pci/devices/*/mdev_supported_types/i915-GVTg_V5_4/description</command>
''; '';
example = { example = {
i915-GVTg_V5_8 = { i915-GVTg_V5_8.uuid = "a297db4a-f4c2-11e6-90f6-d3b88d6c9525";
uuid = "a297db4a-f4c2-11e6-90f6-d3b88d6c9525";
};
}; };
}; };
}; };
@ -50,10 +49,7 @@ in {
}; };
boot.kernelModules = [ "kvmgt" ]; boot.kernelModules = [ "kvmgt" ];
boot.kernelParams = [ "i915.enable_gvt=1" ];
boot.extraModprobeConfig = ''
options i915 enable_gvt=1
'';
systemd.paths = mapAttrs' (name: value: systemd.paths = mapAttrs' (name: value:
nameValuePair "kvmgt-${name}" { nameValuePair "kvmgt-${name}" {
@ -65,6 +61,10 @@ in {
} }
) cfg.vgpus; ) cfg.vgpus;
services.udev.extraRules = ''
SUBSYSTEM=="vfio", OWNER="root", GROUP="kvm"
'';
systemd.services = mapAttrs' (name: value: systemd.services = mapAttrs' (name: value:
nameValuePair "kvmgt-${name}" { nameValuePair "kvmgt-${name}" {
description = "KVMGT VGPU ${name}"; description = "KVMGT VGPU ${name}";