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nixos/kvmgt: add udev rules for unprivileged access

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Jörg Thalheim 2020-03-13 07:00:17 +00:00
parent 85aae79ca1
commit 505d241ee3
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GPG key ID: 003F2096411B5F92
1 changed files with 7 additions and 4 deletions
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11
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";
};
}; };
}; };
}; };
@ -62,6 +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}";