47 lines
1.5 KiB
Markdown
47 lines
1.5 KiB
Markdown
# Raspberry Pi 4 PREEMPT_RT Kernel for NixOS
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This flake provides packages to build the [Raspberry Pi supplied kernel](https://github.com/raspberrypi/linux) with `PREEMPT_RT` enabled.
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### Usage
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Add the overlay and set `boot.kernelPackages` to `pkgs.linuxPackages_rpi4_rt`
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An example flake based system config with `boot.loader.raspberryPi` and `nixos-hardware`:
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``` nix
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{
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inputs = {
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nixpkgs.url = "nixpkgs/nixos-unstable";
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nixos-hardware.url = "github:mattywillo/linux_rpi4_rt-nix";
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rpi4_rt.url = "github:this/url";
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};
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outputs = { self, nixpkgs, nixos-hardware, rpi4_rt }: {
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nixosConfigurations.rpi = nixpkgs.lib.nixosSystem {
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modules = [
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({pkgs, lib, ...}: {
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nixpkgs.overlays = [ rpi4_rt.overlay ];
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imports = [
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./hardware-configuration.nix
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nixos-hardware.nixosModules.raspberry-pi-4
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];
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boot.kernelPackages = pkgs.linux_rpi4_rt.linuxPackages;
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boot.loader.grub.enable = false;
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boot.loader.grub.device = "nodev";
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# Recent NixOS versions enforce uniqueness on installBootLoader
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# making nixos-hardware.raspberry-pi-4' and 'boot.loader.raspberryPi'
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# conflict, this line prevents nixos-hardware setting the bootloader
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boot.loader.generic-extlinux-compatible.enable = lib.mkForce false;
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boot.loader.raspberryPi.enable = true;
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boot.loader.raspberryPi.version = 4;
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#...regular system configuration...
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})
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];
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};
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};
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}
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```
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