51 lines
1.3 KiB
Nix
51 lines
1.3 KiB
Nix
{ config, lib, ... }:
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with lib;
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let
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cfg = config.hardware.cpu.amd.sev;
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defaultGroup = "sev";
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in
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with lib; {
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options.hardware.cpu.amd.sev = {
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enable = mkEnableOption "access to the AMD SEV device";
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user = mkOption {
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description = lib.mdDoc "Owner to assign to the SEV device.";
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type = types.str;
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default = "root";
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};
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group = mkOption {
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description = lib.mdDoc "Group to assign to the SEV device.";
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type = types.str;
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default = defaultGroup;
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};
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mode = mkOption {
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description = lib.mdDoc "Mode to set for the SEV device.";
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type = types.str;
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default = "0660";
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};
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};
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config = mkIf cfg.enable {
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assertions = [
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{
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assertion = hasAttr cfg.user config.users.users;
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message = "Given user does not exist";
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}
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{
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assertion = (cfg.group == defaultGroup) || (hasAttr cfg.group config.users.groups);
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message = "Given group does not exist";
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}
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];
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boot.extraModprobeConfig = ''
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options kvm_amd sev=1
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'';
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users.groups = optionalAttrs (cfg.group == defaultGroup) {
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"${cfg.group}" = {};
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};
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services.udev.extraRules = with cfg; ''
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KERNEL=="sev", OWNER="${user}", GROUP="${group}", MODE="${mode}"
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'';
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};
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}
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