nixfiles/hosts/MacPro31/configuration.nix

# Apple Mac Pro 3,1 (Early 2008, dual Xeon Harpertown, x86_64). Desktop host:
# shared graphical/wired options live in ../../modules/desktop.nix; only
# host-specific settings are here. Install notes (EFI booting, GPU, partitions):
# see ./README.md.
{ ... }:

{
  imports = [
    ./hardware-configuration.nix
    ./nvidia.nix
  ];

  # Dual quad-core Xeon (Harpertown/Penryn): SSE4.1 but no SSE4.2 or POPCNT,
  # i.e. x86-64-v1. Declaring it here switches off the fleet flags that need a
  # newer CPU -- currently features.claudeCode (see ../../modules/features.nix).
  features.cpu.microarchLevel = 1;

  # The Mac Pro 3,1 has 64-bit EFI (confirmed by the owner), so boot via
  # systemd-boot like the MBP -- no GRUB/BIOS shim needed.
  boot.loader.systemd-boot.enable = true;
  # Apple's EFI does not reliably support efibootmgr NVRAM writes; leave the
  # firmware vars untouched.
  boot.loader.efi.canTouchEfiVariables = false;
  # Apple-EFI quirk: if the Mac does not pick up the bootloader at the boot
  # picker, install it to the fallback path \EFI\BOOT\BOOTX64.EFI and/or
  # "bless" the ESP from macOS. Uncomment to write the removable fallback path:
  # boot.loader.efi.efiInstallAsRemovable = true;

  networking.hostName = "MacPro31-NixOS";

  # Elderly host: a compressed RAM swap softens memory pressure (earlyoom in
  # workstation.nix is the backstop).
  zramSwap.enable = true;

  # sshd (daemon, port 22, key-only policy) comes from ../../modules/ssh.nix;
  # the firewall itself is enabled in workstation.nix with a default-deny policy.

  # Dual Harpertown Xeon microcode. Redistributable firmware (GPU/NIC blobs) is
  # enabled in workstation.nix.
  hardware.cpu.intel.updateMicrocode = true;

  # GPU: the stock card (ATI Radeon HD 2600 XT / NVIDIA GeForce 8800 GT) has
  # been replaced with an NVIDIA Quadro P400. Driver, Wayland quirks and
  # GPU-enabled Docker live in ./nvidia.nix.

  # See `man configuration.nix` / the stateVersion docs before changing.
  system.stateVersion = "26.05";
}