Rebase to flake parts #4

modules/hosts/14900k/_private/nvidia.nix

@@ -0,0 +1,26 @@
+# NVIDIA for host desktop; when `chiasson.system.vm.gpuPassthrough` is enabled, drop NVIDIA for VFIO (port later).
+{ config, lib, pkgs, ... }:
+let
+  passthrough = config.chiasson.system.vm.gpuPassthrough.enable;
+in
+{
+  boot.kernelParams = [ "snd_hda_core.gpu_bind=0" ];
+  boot.kernelPackages = lib.mkDefault pkgs.linuxPackages_latest;
+
+  services.xserver.videoDrivers = if passthrough then [ "modesetting" ] else [ "nvidia" ];
+
+  hardware.nvidia =
+    if passthrough then
+      lib.mkForce { }
+    else {
+      modesetting.enable = true;
+      powerManagement.enable = false;
+      powerManagement.finegrained = false;
+      open = true;
+      nvidiaSettings = true;
+      package = config.boot.kernelPackages.nvidiaPackages.stable;
+    };
+
+  # Needed for `docker compose` GPU passthrough (e.g. `--gpus all` / DEVICE=gpu).
+  hardware.nvidia-container-toolkit.enable = !passthrough;
+}