107 lines
3 KiB
Nix
107 lines
3 KiB
Nix
## Kernel-related options
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## ======================
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##
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##
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{ lib, pkgs, config, ...}:
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let
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inherit (lib) mkEnableOption mkOption types isDerivation hasAttr ;
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inherit (pkgs.pseudofile) dir symlink;
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inherit (pkgs.liminix.networking) address interface;
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inherit (pkgs.liminix.services) bundle;
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inherit (pkgs) liminix;
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type_service = pkgs.liminix.lib.types.service;
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in {
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options = {
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kernel = {
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src = mkOption { type = types.path; } ;
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modular = mkOption {
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type = types.bool;
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default = true;
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description = "support loadable kernel modules";
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};
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extraPatchPhase = mkOption {
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default = "true";
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type = types.lines;
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};
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config = mkOption {
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description = ''
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Kernel config options, as listed in Kconfig* files in the
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kernel source tree. Do not include the leading "CONFIG_"
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prefix when defining these. Most values are "y", "n" or "m",
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but sometimes other strings are also used.
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'';
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type = types.attrsOf types.nonEmptyStr;
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example = lib.literalExpression ''
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{
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BRIDGE = "y";
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TMPFS = "y";
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FW_LOADER_USER_HELPER = "n";
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};
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'';
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};
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makeTargets = mkOption {
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type = types.listOf types.str;
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};
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};
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};
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config = {
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system.outputs =
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let k = liminix.builders.kernel.override {
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inherit (config.kernel) config src extraPatchPhase;
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targets = config.kernel.makeTargets;
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};
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in {
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kernel = k.vmlinux;
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zimage = k.zImage;
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};
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kernel = rec {
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modular = true; # disabling this is not yet supported
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makeTargets = ["vmlinux"];
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config = {
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IKCONFIG = "y";
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IKCONFIG_PROC = "y";
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PROC_FS = "y";
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KEXEC = "y";
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MODULES = if modular then "y" else "n";
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MODULE_SIG = if modular then "y" else "n";
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DEBUG_FS = "y";
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# basic networking protocols
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NET = "y";
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UNIX = "y";
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INET = "y";
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IPV6 = "y";
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PACKET = "y"; # for ppp, tcpdump ...
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SYSVIPC= "y";
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NETDEVICES = "y"; # even PPP needs this
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# disabling this option causes the kernel to use an "empty"
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# initramfs instead: it has a /dev/console node and not much
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# else. Note that pid 1 is started *before* the root
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# filesystem is mounted and it expects /dev/console to be
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# present already
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BLK_DEV_INITRD = lib.mkDefault "n"; # overriden by initramfs module
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# s6-linux-init mounts this on /dev
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DEVTMPFS = "y";
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# some or all of these may be fix for "tmpfs: Unknown parameter 'mode'" error
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TMPFS = "y";
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TMPFS_POSIX_ACL = "y";
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TMPFS_XATTR = "y";
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FW_LOADER = "y";
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FW_LOADER_COMPRESS = "y";
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# We don't have a user helper, so we get multiple 60s pauses
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# at boot time unless we disable trying to call it.
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# https://lkml.org/lkml/2013/8/5/175
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FW_LOADER_USER_HELPER = "n";
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};
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};
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};
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}
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