nix/hosts/common/configs/system/cpu/options.nix

{ lib, ... }:
{
  options.hardware.cpu =
    with lib;
    with types;
    {
      cores = mkOption {
        type = ints.positive;
        description = "The number of cpu cores.";
      };

      threads = mkOption {
        type = ints.positive;
        description = "The number of cpu threads.";
      };
    };
}