alberand / nix-kernel-vm

Setup for Linux Kernel development in VM on NixOS

Development shell for Linux Kernel

Usage

Add this to your ./linux directory:

{
  description = "Linux Kernel development env";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    nix-kernel-vm.url = "github:alberand/nix-kernel-vm";
  };

  outputs = { self, nixpkgs, flake-utils, nix-kernel-vm }:
  flake-utils.lib.eachDefaultSystem (system:
  let
    pkgs = import nixpkgs { inherit system; };
    root = builtins.toString ./.;
  in rec {
    devShells.default = nix-kernel-vm.lib.mkLinuxShell {
      inherit pkgs;
      root = root;
      xfstests-src = fetchGit /home/alberand/Projects/xfstests-dev;

      xfsprogs-src = pkgs.fetchFromGitHub {
        owner = "alberand";
        repo = "xfsprogs";
        rev = "91bf9d98df8b50c56c9c297c0072a43b0ee02841";
        sha256 = "sha256-otEJr4PTXjX0AK3c5T6loLeX3X+BRBvCuDKyYcY9MQ4=";
      };
    };
  });
}

Then, create direnv rule in ./linux directory:

echo "use flake . --impure" > .envrc

And enable direnv with direnv allow.

That it. Now entering this directory direnv will activate nix-shell configured by the flake.nix. In this shell you have all dependencies to compile the kernel and vmtest application.

vmtest is virtual machine which will take your compiled kernel and run xfstests against it. You need to create .vmtest configuration or specify parameters with command line options. See vmtest --help.