From 44cb0800c8694c6a74a1a73fb0d9b716bac012f8 Mon Sep 17 00:00:00 2001
From: Thore Sommer <thore.sommer@tum.de>
Date: Fri, 17 Oct 2025 16:45:09 +0200
Subject: [PATCH] linux/common-config: enable CDEV and NOIOMMU for VFIO

---
 pkgs/os-specific/linux/kernel/common-config.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index 9fe615ccf5e4..15914d94400d 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -988,6 +988,11 @@ let
 
       # Enable device detection on virtio-mmio hypervisors
       VIRTIO_MMIO_CMDLINE_DEVICES = yes;
+
+      # Enable CDEV and NOIOMMU support for VFIO, which is useful for
+      # passthrough.
+      VFIO_DEVICE_CDEV = yes;
+      VFIO_NOIOMMU = yes;
     };
 
     media = {