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extract kernel config options from base module

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we then "import" them straight back into base.nix - it's not
as though you can opt out of having a kernel. But this means
they'll appear separately in the documentation
This commit is contained in:
Daniel Barlow 2023-08-11 18:15:17 +01:00
parent 3ea40f95dc
commit b81604870b
2 changed files with 89 additions and 63 deletions
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66
modules/base.nix
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@ -12,6 +12,9 @@ let
type_service = pkgs.liminix.lib.types.service;
in {
imports = [
./kernel.nix # this is a separate module for doc purposes
];
options = {
# analogous to nixos systemPackages, but we don't symlink into
# /run/current-system, we just add the paths in /etc/profile
@ -28,23 +31,6 @@ in {
default = "squashfs";
type = types.str;
};
kernel = {
src = mkOption { type = types.package; } ;
modular = mkOption {
type = types.bool;
default = true;
description = "support loadable kernel modules";
};
extraPatchPhase = mkOption {
default = "true";
type = types.lines;
} ;
config = mkOption {
# mostly the values are y n or m, but sometimes
# other strings are also used
type = types.attrsOf types.nonEmptyStr;
};
};
boot = {
commandLine = mkOption {
type = types.listOf types.nonEmptyStr;
@ -75,52 +61,6 @@ in {
};
};
kernel = rec {
modular = true; # disabling this is not yet supported
config = {
IKCONFIG = "y";
IKCONFIG_PROC = "y";
PROC_FS = "y";
KEXEC = "y";
MODULES = if modular then "y" else "n";
MODULE_SIG = if modular then "y" else "n";
DEBUG_FS = "y";
MIPS_BOOTLOADER_CMDLINE_REQUIRE_COOKIE = "y";
MIPS_BOOTLOADER_CMDLINE_COOKIE = "\"liminix\"";
MIPS_CMDLINE_DTB_EXTEND = "y";
# basic networking protocols
NET = "y";
UNIX = "y";
INET = "y";
IPV6 = "y";
PACKET = "y"; # for ppp, tcpdump ...
SYSVIPC= "y";
# disabling this option causes the kernel to use an "empty"
# initramfs instead: it has a /dev/console node and not much
# else. Note that pid 1 is started *before* the root
# filesystem is mounted and it expects /dev/console to be
# present already
BLK_DEV_INITRD = lib.mkDefault "n"; # overriden by initramfs module
# s6-linux-init mounts this on /dev
DEVTMPFS = "y";
# some or all of these may be fix for "tmpfs: Unknown parameter 'mode'" error
TMPFS = "y";
TMPFS_POSIX_ACL = "y";
TMPFS_XATTR = "y";
FW_LOADER = "y";
FW_LOADER_COMPRESS = "y";
# We don't have a user helper, so we get multiple 60s pauses
# at boot time unless we disable trying to call it.
# https://lkml.org/lkml/2013/8/5/175
FW_LOADER_USER_HELPER = "n";
};
};
boot.commandLine = [
"console=ttyS0,115200 panic=10 oops=panic init=/bin/init loglevel=8"
"root=${config.hardware.rootDevice}"