mirror of
https://github.com/NixOS/nixpkgs.git
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f3d94cfc23
This reverts commit cad8957eab. It
breaks NixOps, but more importantly, such major changes to the module
system really need to be reviewed.
296 lines
9.1 KiB
Nix
296 lines
9.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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kernel = config.boot.kernelPackages.kernel;
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kernelModulesConf = pkgs.writeText "nixos.conf"
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''
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${concatStringsSep "\n" config.boot.kernelModules}
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'';
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in
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{
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###### interface
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options = {
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boot.kernelPackages = mkOption {
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default = pkgs.linuxPackages;
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# We don't want to evaluate all of linuxPackages for the manual
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# - some of it might not even evaluate correctly.
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defaultText = "pkgs.linuxPackages";
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example = literalExample "pkgs.linuxPackages_2_6_25";
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description = ''
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This option allows you to override the Linux kernel used by
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NixOS. Since things like external kernel module packages are
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tied to the kernel you're using, it also overrides those.
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This option is a function that takes Nixpkgs as an argument
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(as a convenience), and returns an attribute set containing at
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the very least an attribute <varname>kernel</varname>.
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Additional attributes may be needed depending on your
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configuration. For instance, if you use the NVIDIA X driver,
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then it also needs to contain an attribute
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<varname>nvidia_x11</varname>.
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'';
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};
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boot.kernelParams = mkOption {
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type = types.listOf types.str;
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default = [ ];
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description = "Parameters added to the kernel command line.";
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};
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boot.consoleLogLevel = mkOption {
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type = types.int;
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default = 4;
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description = ''
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The kernel console log level. Log messages with a priority
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numerically less than this will not appear on the console.
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'';
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};
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boot.vesa = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to activate VESA video mode on boot.
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'';
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};
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boot.extraModulePackages = mkOption {
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type = types.listOf types.package;
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default = [];
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example = literalExample "[ pkgs.linuxPackages.nvidia_x11 ]";
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description = "A list of additional packages supplying kernel modules.";
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};
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boot.kernelModules = mkOption {
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type = types.listOf types.str;
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default = [];
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description = ''
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The set of kernel modules to be loaded in the second stage of
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the boot process. Note that modules that are needed to
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mount the root file system should be added to
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<option>boot.initrd.availableKernelModules</option> or
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<option>boot.initrd.kernelModules</option>.
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'';
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};
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boot.initrd.availableKernelModules = mkOption {
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type = types.listOf types.str;
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default = [];
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example = [ "sata_nv" "ext3" ];
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description = ''
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The set of kernel modules in the initial ramdisk used during the
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boot process. This set must include all modules necessary for
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mounting the root device. That is, it should include modules
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for the physical device (e.g., SCSI drivers) and for the file
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system (e.g., ext3). The set specified here is automatically
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closed under the module dependency relation, i.e., all
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dependencies of the modules list here are included
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automatically. The modules listed here are available in the
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initrd, but are only loaded on demand (e.g., the ext3 module is
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loaded automatically when an ext3 filesystem is mounted, and
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modules for PCI devices are loaded when they match the PCI ID
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of a device in your system). To force a module to be loaded,
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include it in <option>boot.initrd.kernelModules</option>.
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'';
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};
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boot.initrd.kernelModules = mkOption {
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type = types.listOf types.str;
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default = [];
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description = "List of modules that are always loaded by the initrd.";
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};
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system.modulesTree = mkOption {
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type = types.listOf types.path;
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internal = true;
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default = [];
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description = ''
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Tree of kernel modules. This includes the kernel, plus modules
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built outside of the kernel. Combine these into a single tree of
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symlinks because modprobe only supports one directory.
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'';
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# Convert the list of path to only one path.
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apply = pkgs.aggregateModules;
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};
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system.requiredKernelConfig = mkOption {
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default = [];
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example = literalExample ''
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with config.lib.kernelConfig; [
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(isYes "MODULES")
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(isEnabled "FB_CON_DECOR")
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(isEnabled "BLK_DEV_INITRD")
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]
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'';
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internal = true;
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type = types.listOf types.attrs;
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description = ''
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This option allows modules to specify the kernel config options that
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must be set (or unset) for the module to work. Please use the
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lib.kernelConfig functions to build list elements.
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'';
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};
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};
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###### implementation
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config = mkIf (!config.boot.isContainer) {
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system.build = { inherit kernel; };
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system.modulesTree = [ kernel ] ++ config.boot.extraModulePackages;
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# Implement consoleLogLevel both in early boot and using sysctl
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# (so you don't need to reboot to have changes take effect).
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boot.kernelParams =
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[ "loglevel=${toString config.boot.consoleLogLevel}" ] ++
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optionals config.boot.vesa [ "vga=0x317" ];
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boot.kernel.sysctl."kernel.printk" = config.boot.consoleLogLevel;
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boot.kernelModules = [ "loop" "atkbd" ];
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boot.initrd.availableKernelModules =
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[ # Note: most of these (especially the SATA/PATA modules)
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# shouldn't be included by default since nixos-hardware-scan
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# detects them, but I'm keeping them for now for backwards
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# compatibility.
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# Some SATA/PATA stuff.
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"ahci"
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"sata_nv"
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"sata_via"
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"sata_sis"
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"sata_uli"
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"ata_piix"
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"pata_marvell"
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# Standard SCSI stuff.
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"sd_mod"
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"sr_mod"
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# Standard IDE stuff.
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"ide_cd"
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"ide_disk"
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"ide_generic"
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# SD cards and internal eMMC drives.
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"mmc_block"
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# Support USB keyboards, in case the boot fails and we only have
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# a USB keyboard.
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"uhci_hcd"
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"ehci_hcd"
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"ehci_pci"
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"ohci_hcd"
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"ohci_pci"
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"xhci_hcd"
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"xhci_pci"
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"usbhid"
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"hid_generic" "hid_lenovo"
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"hid_apple" "hid_logitech_dj" "hid_lenovo_tpkbd" "hid_roccat"
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# Misc. stuff.
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"pcips2" "atkbd"
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# To wait for SCSI devices to appear.
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"scsi_wait_scan"
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# Needed by the stage 2 init script.
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"rtc_cmos"
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];
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boot.initrd.kernelModules =
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[ # For LVM.
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"dm_mod"
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];
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# The Linux kernel >= 2.6.27 provides firmware.
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hardware.firmware = [ kernel ];
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# Create /etc/modules-load.d/nixos.conf, which is read by
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# systemd-modules-load.service to load required kernel modules.
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environment.etc = singleton
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{ target = "modules-load.d/nixos.conf";
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source = kernelModulesConf;
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};
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systemd.services."systemd-modules-load" =
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{ wantedBy = [ "multi-user.target" ];
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restartTriggers = [ kernelModulesConf ];
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environment.MODULE_DIR = "/run/booted-system/kernel-modules/lib/modules";
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serviceConfig =
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{ # Ignore failed module loads. Typically some of the
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# modules in ‘boot.kernelModules’ are "nice to have but
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# not required" (e.g. acpi-cpufreq), so we don't want to
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# barf on those.
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SuccessExitStatus = "0 1";
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};
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};
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systemd.services.kmod-static-nodes =
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{ environment.MODULE_DIR = "/run/booted-system/kernel-modules/lib/modules";
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};
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lib.kernelConfig = {
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isYes = option: {
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assertion = config: config.isYes option;
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message = "CONFIG_${option} is not yes!";
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configLine = "CONFIG_${option}=y";
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};
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isNo = option: {
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assertion = config: config.isNo option;
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message = "CONFIG_${option} is not no!";
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configLine = "CONFIG_${option}=n";
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};
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isModule = option: {
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assertion = config: config.isModule option;
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message = "CONFIG_${option} is not built as a module!";
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configLine = "CONFIG_${option}=m";
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};
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### Usually you will just want to use these two
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# True if yes or module
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isEnabled = option: {
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assertion = config: config.isEnabled option;
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message = "CONFIG_${option} is not enabled!";
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configLine = "CONFIG_${option}=y";
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};
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# True if no or omitted
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isDisabled = option: {
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assertion = config: config.isDisabled option;
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message = "CONFIG_${option} is not disabled!";
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configLine = "CONFIG_${option}=n";
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};
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};
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# The config options that all modules can depend upon
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system.requiredKernelConfig = with config.lib.kernelConfig; [
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# !!! Should this really be needed?
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(isYes "MODULES")
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(isYes "BINFMT_ELF")
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];
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# nixpkgs kernels are assumed to have all required features
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assertions = if config.boot.kernelPackages.kernel ? features then [] else
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let cfg = config.boot.kernelPackages.kernel.config; in map (attrs:
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{ assertion = attrs.assertion cfg; inherit (attrs) message; }
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) config.system.requiredKernelConfig;
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};
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}
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