add current state I use of

https://github.com/nix-community/nixos-apple-silicon
2025-07-06 16:33:57 +02:00 · 2025-07-06 16:33:57 +02:00 · 6cea23953e
commit 6cea23953e
parent 1372b1b552
17 changed files with 8755 additions and 0 deletions
--- a/zeta/apple-silicon-support/modules/kernel/default.nix
+++ b/zeta/apple-silicon-support/modules/kernel/default.nix
@ -0,0 +1,106 @@
+# the Asahi Linux kernel and options that must go along with it
+
+{ config, pkgs, lib, ... }:
+{
+  config = lib.mkIf config.hardware.asahi.enable {
+    boot.kernelPackages = let
+      pkgs' = config.hardware.asahi.pkgs;
+    in
+      pkgs'.linux-asahi.override {
+        _kernelPatches = config.boot.kernelPatches;
+        withRust = config.hardware.asahi.withRust;
+      };
+
+    # we definitely want to use CONFIG_ENERGY_MODEL, and
+    # schedutil is a prerequisite for using it
+    # source: https://www.kernel.org/doc/html/latest/scheduler/sched-energy.html
+    powerManagement.cpuFreqGovernor = lib.mkOverride 800 "schedutil";
+
+    boot.initrd.includeDefaultModules = false;
+    boot.initrd.availableKernelModules = [
+      # list of initrd modules stolen from
+      # https://github.com/AsahiLinux/asahi-scripts/blob/f461f080a1d2575ae4b82879b5624360db3cff8c/initcpio/install/asahi
+      "apple-mailbox"
+      "nvme_apple"
+      "pinctrl-apple-gpio"
+      "macsmc"
+      "macsmc-rtkit"
+      "i2c-pasemi-platform"
+      "tps6598x"
+      "apple-dart"
+      "dwc3"
+      "dwc3-of-simple"
+      "xhci-pci"
+      "pcie-apple"
+      "gpio_macsmc"
+      "phy-apple-atc"
+      "nvmem_apple_efuses"
+      "spi-apple"
+      "spi-hid-apple"
+      "spi-hid-apple-of"
+      "rtc-macsmc"
+      "simple-mfd-spmi"
+      "spmi-apple-controller"
+      "nvmem_spmi_mfd"
+      "apple-dockchannel"
+      "dockchannel-hid"
+      "apple-rtkit-helper"
+
+      # additional stuff necessary to boot off USB for the installer
+      # and if the initrd (i.e. stage 1) goes wrong
+      "usb-storage"
+      "xhci-plat-hcd"
+      "usbhid"
+      "hid_generic"
+    ];
+
+    boot.kernelParams = [
+      "earlycon"
+      "console=tty0"
+      "boot.shell_on_fail"
+      # Apple's SSDs are slow (~dozens of ms) at processing flush requests which
+      # slows down programs that make a lot of fsync calls. This parameter sets
+      # a delay in ms before actually flushing so that such requests can be
+      # coalesced. Be warned that increasing this parameter above zero (default
+      # is 1000) has the potential, though admittedly unlikely, risk of
+      # UNBOUNDED data corruption in case of power loss!!!! Don't even think
+      # about it on desktops!!
+      "nvme_apple.flush_interval=0"
+    ];
+
+    # U-Boot does not support EFI variables
+    boot.loader.efi.canTouchEfiVariables = lib.mkForce false;
+
+    # U-Boot does not support switching console mode
+    boot.loader.systemd-boot.consoleMode = "0";
+
+    # GRUB has to be installed as removable if the user chooses to use it
+    boot.loader.grub = lib.mkDefault {
+      efiSupport = true;
+      efiInstallAsRemovable = true;
+      device = "nodev";
+    };
+
+    # autosuspend was enabled as safe for the PCI SD card reader
+    # "Genesys Logic, Inc GL9755 SD Host Controller [17a0:9755] (rev 01)"
+    # by recent systemd versions, but this has a "negative interaction"
+    # with our kernel/SoC and causes random boot hangs. disable it!
+    services.udev.extraHwdb = ''
+      pci:v000017A0d00009755*
+        ID_AUTOSUSPEND=0
+    '';
+  };
+
+  imports = [
+    (lib.mkRemovedOptionModule [ "hardware" "asahi" "addEdgeKernelConfig" ]
+      "All edge kernel config options are now the default.")
+  ];
+
+  options.hardware.asahi.withRust = lib.mkOption {
+    type = lib.types.bool;
+    default = false;
+    description = ''
+      Build the Asahi Linux kernel with Rust support.
+    '';
+  };
+}