more fixes

hosts/focalor/scripts/end.sh

@@ -1,20 +0,0 @@
-#!/usr/bin/env bash
-set -x
-
-virsh nodedev-reattach pci_0000_0a_00_0
-virsh nodedev-reattach pci_0000_0a_00_1
-virsh nodedev-reattach pci_0000_06_00_1
-virsh nodedev-reattach pci_0000_06_00_3
-virsh nodedev-reattach pci_0000_0c_00_3
-
-modprobe -r vfio-pci
-
-modprobe nvidia_modeset
-modprobe nvidia_uvm
-modprobe nvidia_drm
-modprobe nvidia
-
-modprobe -r xhci_pci
-modprobe xhci_pci
-
-systemctl restart display-manager

hosts/focalor/scripts/vm-win11-hook.sh

@@ -0,0 +1,57 @@
+#!/run/current-system/sw/bin/bash
+
+readonly GUEST_NAME="$1"
+readonly HOOK_NAME="$2"
+readonly STATE_NAME="$3"
+
+function start_hook() {
+  # Stops GUI
+  systemctl isolate multi-user.target
+
+  # Avoids race condition
+  sleep 2
+
+  # Unloads the NVIDIA drivers
+  modprobe -r nvidia_drm
+  modprobe -r nvidia_uvm
+  modprobe -r nvidia_modeset
+  modprobe -r nvidia
+
+  # Other code you might want to run
+}
+
+function revert_hook() {
+  virsh nodedev-reattach pci_0000_0a_00_0
+  virsh nodedev-reattach pci_0000_0a_00_1
+  virsh nodedev-reattach pci_0000_06_00_1
+  virsh nodedev-reattach pci_0000_06_00_3
+  virsh nodedev-reattach pci_0000_0c_00_3
+
+  modprobe -r vfio-pci
+
+  # Loads the NVIDIA drivers
+  modprobe nvidia_modeset
+  modprobe nvidia_uvm
+  modprobe nvidia_drm
+  modprobe nvidia
+
+  modprobe -r xhci_pci
+  modprobe xhci_pci
+
+  # Starts the UI again
+  systemctl restart display-manager
+  systemctl isolate graphical.target
+}
+
+# I am not using the script from Passthrough-Post
+# because hooks option saves it to /var/lib/libvirt/hooks/qemu.d.
+# It's simpler to just rewrite it for NixOS.
+if [[ "$GUEST_NAME" != "win11" ]]; then
+  exit 0
+fi
+
+if [[ "$HOOK_NAME" == "prepare" && "$STATE_NAME" == "begin" ]]; then
+  start_hook
+elif [[ "$HOOK_NAME" == "release" && "$STATE_NAME" == "end" ]]; then
+  revert_hook
+fi

hosts/focalor/vfio.nix

@@ -18,9 +18,44 @@
       };
     };
     hooks.qemu = {
-      end = "./scripts/end.sh";
+      "win11" = ./scripts/vm-win11-hook.sh;
     };
   };
 
+  systemd.services.libvirtd = {
+    path = let
+      env = pkgs.buildEnv {
+        name = "qemu-hook-env";
+        paths = with pkgs; [
+          bash
+          libvirt
+          kmod
+          systemd
+          ripgrep
+          sd
+        ];
+      };
+    in
+      [ env ];
+    
+    /*preStart =
+    ''
+      mkdir -p /var/lib/libvirt/hooks
+      mkdir -p /var/lib/libvirt/hooks/qemu.d/win10/prepare/begin
+      mkdir -p /var/lib/libvirt/hooks/qemu.d/win10/release/end
+      mkdir -p /var/lib/libvirt/vgabios
+      
+      ln -sf /home/regent/symlinks/qemu /var/lib/libvirt/hooks/qemu
+      ln -sf /home/regent/symlinks/kvm.conf /var/lib/libvirt/hooks/kvm.conf
+      ln -sf /home/regent/symlinks/start.sh /var/lib/libvirt/hooks/qemu.d/win11/prepare/begin/start.sh
+      ln -sf /home/regent/symlinks/stop.sh /var/lib/libvirt/hooks/qemu.d/win11/release/end/stop.sh
+      
+      chmod +x /var/lib/libvirt/hooks/qemu
+      chmod +x /var/lib/libvirt/hooks/kvm.conf
+      chmod +x /var/lib/libvirt/hooks/qemu.d/win11/prepare/begin/start.sh
+      chmod +x /var/lib/libvirt/hooks/qemu.d/win11/release/end/stop.sh
+    '';*/
+  };
+
   users.extraUsers.regent.extraGroups = [ "libvirtd" ];
 }

result

@@ -0,0 +1 @@
+/nix/store/4483jzzk7w649g57g0p1gfnk2skkz85v-nixos-system-focalor-25.05.20250525.7c43f08