646b892680
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47 lines
1.3 KiB
Nix
47 lines
1.3 KiB
Nix
{
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config,
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pkgs,
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lib,
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...
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}:
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let
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cfg = config.boot.kexec;
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in
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{
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options.boot.kexec = {
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enable = lib.mkEnableOption "kexec" // {
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default = lib.meta.availableOn pkgs.stdenv.hostPlatform pkgs.kexec-tools;
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defaultText = lib.literalExpression ''lib.meta.availableOn pkgs.stdenv.hostPlatform pkgs.kexec-tools'';
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};
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};
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config = lib.mkIf cfg.enable {
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environment.systemPackages = [ pkgs.kexec-tools ];
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systemd.services.prepare-kexec = {
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description = "Preparation for kexec";
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wantedBy = [ "kexec.target" ];
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before = [ "systemd-kexec.service" ];
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unitConfig.DefaultDependencies = false;
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serviceConfig.Type = "oneshot";
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path = [ pkgs.kexec-tools ];
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script = ''
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# Don't load the current system profile if we already have a kernel loaded
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if [[ 1 = "$(</sys/kernel/kexec_loaded)" ]] ; then
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echo "kexec kernel has already been loaded, prepare-kexec skipped"
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exit 0
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fi
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p=$(readlink -f /nix/var/nix/profiles/system)
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if ! [[ -d $p ]]; then
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echo "Could not find system profile for prepare-kexec"
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exit 1
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fi
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echo "Loading NixOS system via kexec."
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exec kexec --load "$p/kernel" --initrd="$p/initrd" --append="$(cat "$p/kernel-params") init=$p/init"
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'';
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};
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};
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}
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