50 lines
1.4 KiB
Nix
50 lines
1.4 KiB
Nix
{ config, lib, options, ... }:
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with lib;
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let
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inherit (builtins) readFile fetchurl;
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cfg = config.security.mitigations;
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cmdline = ''
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ibrs noibpb nopti nospectre_v2 nospectre_v1 l1tf=off nospec_store_bypass_disable no_stf_barrier mds=off tsx=on tsx_async_abort=off mitigations=off
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'';
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in {
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options = {
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security.mitigations.disable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to disable spectre and meltdown mitigations in the kernel. Do
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not use this in mission critical deployments, or on any machine you do
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not have physical access to.
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'';
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};
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security.mitigations.acceptRisk = mkOption {
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type = types.bool;
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default = false;
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description = ''
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To ensure users know what they are doing, they must explicitly accept
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the risk of turning off mitigations by enabling this.
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'';
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};
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};
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config = mkIf cfg.disable {
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assertions = [{
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assertion = cfg.acceptRisk;
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message = ''
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You have enabled 'security.mitigations.disable' without accepting the
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risk of disabling mitigations.
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You must explicitly accept the risk of running the kernel without
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Spectre or Meltdown mitigations. Set 'security.mitigations.acceptRisk'
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to 'true' only if you know what your doing!
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'';
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}];
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boot.kernelParams = splitString " " cmdline;
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};
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}
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