commit e22dff17f502154b89994c07c7edd7a34925db65 · pyrox.dev/nixpkgs

+59 -30
nixos/modules/hardware/cpu/amd-sev.nix
···

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       { config, lib, ... }:

     

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       { config, options, 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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         cfgSev = config.hardware.cpu.amd.sev;

     

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         cfgSevGuest = config.hardware.cpu.amd.sevGuest;

     

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         optionsFor = device: group: {

     

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           enable = mkEnableOption (lib.mdDoc "access to the AMD ${device} device");

     

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           user = mkOption {

     

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             description = lib.mdDoc "Owner to assign to the ${device} 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 ${device} device.";

     

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             type = types.str;

     

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             default = group;

     

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           };

     

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           mode = mkOption {

     

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             description = lib.mdDoc "Mode to set for the ${device} 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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       in

     

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         with lib; {

     

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           options.hardware.cpu.amd.sev = {

     

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             enable = mkEnableOption (lib.mdDoc "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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       with lib; {

     

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         options.hardware.cpu.amd.sev = optionsFor "SEV" "sev";

     

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         options.hardware.cpu.amd.sevGuest = optionsFor "SEV guest" "sev-guest";

     

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           config = mkIf cfg.enable {

     

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         config = mkMerge [

     

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           # /dev/sev

     

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           (mkIf cfgSev.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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                 assertion = hasAttr cfgSev.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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                 assertion = (cfgSev.group == options.hardware.cpu.amd.sev.group.default) || (hasAttr cfgSev.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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               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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             users.groups = optionalAttrs (cfgSev.group == options.hardware.cpu.amd.sev.group.default) {

     

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               "${cfgSev.group}" = { };

     

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             };

     

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             services.udev.extraRules = with cfg; ''

     

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             services.udev.extraRules = with cfgSev; ''

     

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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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           })

     

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           # /dev/sev-guest

     

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           (mkIf cfgSevGuest.enable {

     

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             assertions = [

     

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               {

     

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                 assertion = hasAttr cfgSevGuest.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 = (cfgSevGuest.group == options.hardware.cpu.amd.sevGuest.group.default) || (hasAttr cfgSevGuest.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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             users.groups = optionalAttrs (cfgSevGuest.group == options.hardware.cpu.amd.sevGuest.group.default) {

     

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               "${cfgSevGuest.group}" = { };

     

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             };

     

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             services.udev.extraRules = with cfgSevGuest; ''

     

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               KERNEL=="sev-guest", OWNER="${user}", GROUP="${group}", MODE="${mode}"

     

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             '';

     

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           })

     

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         ];

     

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       }