136 lines
4.6 KiB
Nix
136 lines
4.6 KiB
Nix
{pkgs, config, ...}:
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with pkgs.lib;
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let
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efiBootStubBuilder = pkgs.substituteAll {
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src = ./efi-boot-stub-builder.sh;
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isExecutable = true;
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inherit (pkgs) bash;
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path = [pkgs.coreutils pkgs.gnused pkgs.gnugrep pkgs.glibc] ++ (pkgs.stdenv.lib.optionals config.boot.loader.efiBootStub.runEfibootmgr [pkgs.efibootmgr pkgs.module_init_tools]);
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inherit (config.boot.loader.efiBootStub) efiSysMountPoint runEfibootmgr installStartupNsh efiDisk efiPartition postEfiBootMgrCommands;
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efiShell = if config.boot.loader.efiBootStub.installShell then
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if pkgs.stdenv.isi686 then
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pkgs.fetchurl {
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url = "https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2/EdkShellBinPkg/FullShell/Ia32/Shell_Full.efi";
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sha256 = "1gv6kyaspczdp7x8qnx5x76ilriaygkfs99ay7ihhdi6riclkhfl";
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}
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else
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pkgs.fetchurl {
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url = "https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2/EdkShellBinPkg/FullShell/X64/Shell_Full.efi";
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sha256 = "1g18z84rlavxr5gsrh2g942rfr6znv9fs3fqww5m7dhmnysgyv8p";
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}
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else
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null;
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kernelFile = platform.kernelTarget;
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targetArch = if pkgs.stdenv.isi686 then
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"IA32"
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else if pkgs.stdenv.isx86_64 then
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"X64"
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else
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throw "Unsupported architecture";
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};
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# Temporary check, for nixos to cope both with nixpkgs stdenv-updates and trunk
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platform = pkgs.stdenv.platform;
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in
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{
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options = {
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boot = {
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loader = {
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efiBootStub = {
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enable = mkOption {
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default = false;
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description = ''
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Whether to use the linux kernel as an EFI bootloader.
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When enabled, the kernel, initrd, and an EFI shell script
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to boot the system are copied to the EFI system partition.
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'';
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};
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efiDisk = mkOption {
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default = "/dev/sda";
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description = ''
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The disk that contains the EFI system partition. Only used by
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efibootmgr
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'';
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};
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efiPartition = mkOption {
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default = "1";
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description = ''
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The partition number of the EFI system partition. Only used by
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efibootmgr
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'';
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};
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efiSysMountPoint = mkOption {
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default = "/boot";
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description = ''
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Where the EFI System Partition is mounted.
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'';
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};
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runEfibootmgr = mkOption {
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default = false;
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description = ''
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Whether to run efibootmgr to add the configuration to the boot options list.
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WARNING! efibootmgr has been rumored to brick Apple firmware on
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old kernels! Don't use it on kernels older than 2.6.39!
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'';
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};
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installStartupNsh = mkOption {
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default = false;
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description = ''
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Whether to install a startup.nsh in the root of the EFI system partition.
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For now, it will just boot the latest version when run, the eventual goal
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is to have a basic menu-type interface.
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'';
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};
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installShell = mkOption {
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default = false;
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description = ''
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Whether to install an EFI shell in \EFI\BOOT.
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This _should_ only be needed for removable devices
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(CDs, usb sticks, etc.), but it may be an option for broken
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systems where efibootmgr doesn't work. Particularly useful in
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conjunction with installStartupNsh
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'';
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};
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postEfiBootMgrCommands = mkOption {
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default = "";
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type = types.string;
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description = ''
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Shell commands to be executed immediately after efibootmgr has setup the system EFI.
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Some systems do not follow the EFI specifications properly and insert extra entries.
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Others will brick (fix by removing battery) on boot when it finds more than X entries.
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This hook allows for running a few extra efibootmgr commands to combat these issues.
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'';
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};
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};
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};
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};
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};
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config = mkIf config.boot.loader.efiBootStub.enable {
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assertions = [ { assertion = ! config.boot.kernelPackages.kernel ? features || config.boot.kernelPackages.kernel.features ? efiBootStub; message = "This kernel does not support the EFI boot stub"; } ];
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system = {
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build.installBootLoader = efiBootStubBuilder;
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boot.loader.id = "efiBootStub";
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boot.loader.kernelFile = platform.kernelTarget;
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requiredKernelConfig = with config.lib.kernelConfig; [
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(isYes "EFI_STUB")
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];
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};
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};
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}
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