mirror of
https://git.gay/xqtc/nixos-config
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111 lines
3.4 KiB
Nix
111 lines
3.4 KiB
Nix
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# the Asahi Linux kernel and options that must go along with it
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{
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config,
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pkgs,
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lib,
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...
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}: {
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config = lib.mkIf config.hardware.asahi.enable {
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boot.kernelPackages = let
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pkgs' = config.hardware.asahi.pkgs;
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in
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pkgs'.linux-asahi.override {
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_kernelPatches = config.boot.kernelPatches;
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withRust = config.hardware.asahi.withRust;
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};
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# we definitely want to use CONFIG_ENERGY_MODEL, and
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# schedutil is a prerequisite for using it
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# source: https://www.kernel.org/doc/html/latest/scheduler/sched-energy.html
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powerManagement.cpuFreqGovernor = lib.mkOverride 800 "schedutil";
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boot.initrd.includeDefaultModules = false;
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boot.initrd.availableKernelModules = [
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# list of initrd modules stolen from
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# https://github.com/AsahiLinux/asahi-scripts/blob/f461f080a1d2575ae4b82879b5624360db3cff8c/initcpio/install/asahi
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"apple-mailbox"
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"nvme_apple"
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"pinctrl-apple-gpio"
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"macsmc"
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"macsmc-rtkit"
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"i2c-apple"
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"tps6598x"
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"apple-dart"
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"dwc3"
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"dwc3-of-simple"
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"xhci-pci"
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"pcie-apple"
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"gpio_macsmc"
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"phy-apple-atc"
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"nvmem_apple_efuses"
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"spi-apple"
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"spi-hid-apple"
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"spi-hid-apple-of"
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"rtc-macsmc"
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"simple-mfd-spmi"
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"spmi-apple-controller"
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"nvmem_spmi_mfd"
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"apple-dockchannel"
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"dockchannel-hid"
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"apple-rtkit-helper"
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# additional stuff necessary to boot off USB for the installer
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# and if the initrd (i.e. stage 1) goes wrong
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"usb-storage"
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"xhci-plat-hcd"
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"usbhid"
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"hid_generic"
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];
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boot.kernelParams = [
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"earlycon"
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"console=ttySAC0,115200n8"
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"console=tty0"
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"boot.shell_on_fail"
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# Apple's SSDs are slow (~dozens of ms) at processing flush requests which
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# slows down programs that make a lot of fsync calls. This parameter sets
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# a delay in ms before actually flushing so that such requests can be
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# coalesced. Be warned that increasing this parameter above zero (default
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# is 1000) has the potential, though admittedly unlikely, risk of
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# UNBOUNDED data corruption in case of power loss!!!! Don't even think
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# about it on desktops!!
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"nvme_apple.flush_interval=0"
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];
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# U-Boot does not support EFI variables
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boot.loader.efi.canTouchEfiVariables = lib.mkForce false;
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# U-Boot does not support switching console mode
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boot.loader.systemd-boot.consoleMode = "0";
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# GRUB has to be installed as removable if the user chooses to use it
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boot.loader.grub = lib.mkDefault {
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efiSupport = true;
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efiInstallAsRemovable = true;
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device = "nodev";
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};
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# autosuspend was enabled as safe for the PCI SD card reader
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# "Genesys Logic, Inc GL9755 SD Host Controller [17a0:9755] (rev 01)"
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# by recent systemd versions, but this has a "negative interaction"
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# with our kernel/SoC and causes random boot hangs. disable it!
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services.udev.extraHwdb = ''
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pci:v000017A0d00009755*
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ID_AUTOSUSPEND=0
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'';
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};
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imports = [
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(lib.mkRemovedOptionModule ["hardware" "asahi" "addEdgeKernelConfig"]
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"All edge kernel config options are now the default.")
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];
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options.hardware.asahi.withRust = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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Build the Asahi Linux kernel with Rust support.
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'';
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};
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}
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