diff options
Diffstat (limited to 'nixpkgs/nixos/modules/system/boot/kexec.nix')
-rw-r--r-- | nixpkgs/nixos/modules/system/boot/kexec.nix | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/system/boot/kexec.nix b/nixpkgs/nixos/modules/system/boot/kexec.nix new file mode 100644 index 000000000000..fd2cb94b756b --- /dev/null +++ b/nixpkgs/nixos/modules/system/boot/kexec.nix @@ -0,0 +1,32 @@ +{ pkgs, lib, ... }: + +{ + config = lib.mkIf (lib.any (lib.meta.platformMatch pkgs.stdenv.hostPlatform) pkgs.kexectools.meta.platforms) { + environment.systemPackages = [ pkgs.kexectools ]; + + systemd.services."prepare-kexec" = + { description = "Preparation for kexec"; + wantedBy = [ "kexec.target" ]; + before = [ "systemd-kexec.service" ]; + unitConfig.DefaultDependencies = false; + serviceConfig.Type = "oneshot"; + path = [ pkgs.kexectools ]; + script = + '' + # Don't load the current system profile if we already have a kernel loaded + if [[ 1 = "$(</sys/kernel/kexec_loaded)" ]] ; then + echo "kexec kernel has already been loaded, prepare-kexec skipped" + exit 0 + fi + + p=$(readlink -f /nix/var/nix/profiles/system) + if ! [[ -d $p ]]; then + echo "Could not find system profile for prepare-kexec" + exit 1 + fi + echo "Loading NixOS system via kexec." + exec kexec --load $p/kernel --initrd=$p/initrd --append="$(cat $p/kernel-params) init=$p/init" + ''; + }; + }; +} |