From 10e5c485e489c68a748388842446cbac0e60ad7e Mon Sep 17 00:00:00 2001
From: Jacek Galowicz <jacek@galowicz.de>
Date: Wed, 18 Mar 2026 19:43:36 +0100
Subject: [PATCH 1/2] hardware.amdgpu.zluda.enable: init

---
 nixos/modules/services/hardware/amdgpu.nix | 53 +++++++++++++---------
 1 file changed, 32 insertions(+), 21 deletions(-)

diff --git a/nixos/modules/services/hardware/amdgpu.nix b/nixos/modules/services/hardware/amdgpu.nix
index 5c98a0db50ad..1b4c2f449be9 100644
--- a/nixos/modules/services/hardware/amdgpu.nix
+++ b/nixos/modules/services/hardware/amdgpu.nix
@@ -40,30 +40,41 @@ in
     };
 
     opencl.enable = lib.mkEnableOption "OpenCL support using ROCM runtime library";
+    zluda.enable = lib.mkEnableOption "CUDA support using ZLUDA runtime library";
+    zluda.package = lib.mkPackageOption pkgs "zluda" { };
   };
 
-  config = {
-    boot.kernelParams =
-      lib.optionals cfg.legacySupport.enable [
-        "amdgpu.si_support=1"
-        "amdgpu.cik_support=1"
-        "radeon.si_support=0"
-        "radeon.cik_support=0"
-      ]
-      ++ lib.optionals cfg.overdrive.enable [
-        "amdgpu.ppfeaturemask=${cfg.overdrive.ppfeaturemask}"
-      ];
+  config = lib.mkMerge [
+    {
+      boot.kernelParams =
+        lib.optionals cfg.legacySupport.enable [
+          "amdgpu.si_support=1"
+          "amdgpu.cik_support=1"
+          "radeon.si_support=0"
+          "radeon.cik_support=0"
+        ]
+        ++ lib.optionals cfg.overdrive.enable [
+          "amdgpu.ppfeaturemask=${cfg.overdrive.ppfeaturemask}"
+        ];
 
-    boot.initrd.kernelModules = lib.optionals cfg.initrd.enable [ "amdgpu" ];
-
-    hardware.graphics = lib.mkIf cfg.opencl.enable {
-      enable = lib.mkDefault true;
-      extraPackages = [
-        pkgs.rocmPackages.clr
-        pkgs.rocmPackages.clr.icd
-      ];
-    };
-  };
+      boot.initrd.kernelModules = lib.optionals cfg.initrd.enable [ "amdgpu" ];
+    }
+    (lib.mkIf cfg.opencl.enable {
+      hardware.graphics = {
+        enable = lib.mkDefault true;
+        extraPackages = [
+          pkgs.rocmPackages.clr
+          pkgs.rocmPackages.clr.icd
+        ];
+      };
+    })
+    (lib.mkIf cfg.zluda.enable {
+      hardware.graphics = {
+        enable = lib.mkDefault true;
+        extraPackages = [ cfg.zluda.package ];
+      };
+    })
+  ];
 
   meta = {
     maintainers = with lib.maintainers; [ johnrtitor ];

From a8a1365dd293322ae60e6f6c7935d4db09ae6d09 Mon Sep 17 00:00:00 2001
From: Jacek Galowicz <jacek@galowicz.de>
Date: Wed, 18 Mar 2026 19:44:31 +0100
Subject: [PATCH 2/2] programs.nix-required-mounts.presets.zluda.enable: init

---
 .../modules/programs/nix-required-mounts.nix  | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/nixos/modules/programs/nix-required-mounts.nix b/nixos/modules/programs/nix-required-mounts.nix
index f3e7a75646d0..d4de973c0401 100644
--- a/nixos/modules/programs/nix-required-mounts.nix
+++ b/nixos/modules/programs/nix-required-mounts.nix
@@ -67,6 +67,23 @@ let
     # TODO: Refactor `hardware.graphics` to ease referencing the closure
     # NOTE: A naive implementation may e.g. introduce a conditional infinite recursion (https://github.com/NixOS/nixpkgs/pull/488199)
     nvidia-gpu.unsafeFollowSymlinks = true;
+
+    zluda = {
+      onFeatures = [
+        "cuda"
+      ];
+      paths = [
+        pkgs.addDriverRunpath.driverLink
+        "/dev/dri"
+        "/dev/kfd"
+        "/sys/devices/virtual/kfd"
+        # As per https://www.kernel.org/doc/Documentation/admin-guide/devices.txt
+        # 226 is the major ID for "Direct Rendering Infrastructure (DRI)" devices
+        "/sys/dev/char/226:*"
+      ]
+      ++ config.hardware.graphics.extraPackages;
+      unsafeFollowSymlinks = true;
+    };
   };
 in
 {
@@ -82,6 +99,16 @@ in
       You may extend or override the exposed paths via the
       `programs.nix-required-mounts.allowedPatterns.nvidia-gpu.paths` option.
     '';
+
+    presets.zluda.enable = lib.mkEnableOption ''
+      Same as `programs.nix-required-mounts.presets.nvidia-gpu` but adds paths
+      to the sandbox that are needed for running CUDA applications on top of
+      the ZLUDA translation layer combined with AMD GPUs.
+
+      You may extend or override the exposed paths via the
+      `programs.nix-required-mounts.allowedPatterns.zluda.paths` option.
+    '';
+
     allowedPatterns =
       with lib.types;
       lib.mkOption {
@@ -122,6 +149,14 @@ in
           inherit (defaults) nvidia-gpu;
         };
       })
+      (lib.mkIf cfg.presets.zluda.enable {
+        hardware.graphics.enable = lib.mkDefault true;
+        hardware.amdgpu.zluda.enable = lib.mkDefault true;
+        nix.settings.system-features = cfg.allowedPatterns.zluda.onFeatures;
+        programs.nix-required-mounts.allowedPatterns = {
+          inherit (defaults) zluda;
+        };
+      })
     ]
   );
 }