nixos/kvmgt: allow multiple uuids on same mdev
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@ -9,8 +9,8 @@ let
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vgpuOptions = {
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uuid = mkOption {
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type = types.str;
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description = "UUID of VGPU device. You can generate one with <package>libossp_uuid</package>.";
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type = with types; listOf str;
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description = "UUID(s) of VGPU device. You can generate one with <package>libossp_uuid</package>.";
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};
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};
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@ -36,7 +36,7 @@ in {
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and find info about device via <command>cat /sys/bus/pci/devices/*/mdev_supported_types/i915-GVTg_V5_4/description</command>
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'';
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example = {
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i915-GVTg_V5_8.uuid = "a297db4a-f4c2-11e6-90f6-d3b88d6c9525";
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i915-GVTg_V5_8.uuid = [ "a297db4a-f4c2-11e6-90f6-d3b88d6c9525" ];
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};
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};
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};
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@ -51,31 +51,35 @@ in {
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boot.kernelModules = [ "kvmgt" ];
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boot.kernelParams = [ "i915.enable_gvt=1" ];
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systemd.paths = mapAttrs' (name: value:
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nameValuePair "kvmgt-${name}" {
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description = "KVMGT VGPU ${name} path";
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wantedBy = [ "multi-user.target" ];
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pathConfig = {
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PathExists = "/sys/bus/pci/devices/${cfg.device}/mdev_supported_types/${name}/create";
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};
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}
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) cfg.vgpus;
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services.udev.extraRules = ''
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SUBSYSTEM=="vfio", OWNER="root", GROUP="kvm"
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'';
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systemd.services = mapAttrs' (name: value:
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nameValuePair "kvmgt-${name}" {
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description = "KVMGT VGPU ${name}";
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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ExecStart = "${pkgs.runtimeShell} -c 'echo ${value.uuid} > /sys/bus/pci/devices/${cfg.device}/mdev_supported_types/${name}/create'";
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ExecStop = "${pkgs.runtimeShell} -c 'echo 1 > /sys/bus/pci/devices/${cfg.device}/${value.uuid}/remove'";
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};
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}
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) cfg.vgpus;
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systemd = let
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vgpus = listToAttrs (flatten (mapAttrsToList
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(mdev: opt: map (id: nameValuePair "kvmgt-${id}" { inherit mdev; uuid = id; }) opt.uuid)
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cfg.vgpus));
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in {
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paths = mapAttrs (_: opt:
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{
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description = "KVMGT VGPU ${opt.uuid} path";
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wantedBy = [ "multi-user.target" ];
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pathConfig = {
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PathExists = "/sys/bus/pci/devices/${cfg.device}/mdev_supported_types/${opt.mdev}/create";
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};
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}) vgpus;
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services = mapAttrs (_: opt:
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{
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description = "KVMGT VGPU ${opt.uuid}";
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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ExecStart = "${pkgs.runtimeShell} -c 'echo ${opt.uuid} > /sys/bus/pci/devices/${cfg.device}/mdev_supported_types/${opt.mdev}/create'";
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ExecStop = "${pkgs.runtimeShell} -c 'echo 1 > /sys/bus/pci/devices/${cfg.device}/${opt.uuid}/remove'";
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};
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}) vgpus;
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};
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};
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meta.maintainers = with maintainers; [ gnidorah ];
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