fail at singe gpu passthrough

modules/misc/hook.sh

@@ -0,0 +1,75 @@
+exec 19>>/home/kopatz/Desktop/stoplogfile
+BASH_XTRACEFD=19
+set -x
+set +o errexit
+set +o nounset
+set +o pipefail
+GUEST_NAME="$1"
+HOOK_NAME="$2"
+STATE_NAME="$3"
+GPU_PCI="pci_0000_2B_00_0"
+GPU_AUDIO_PCI="pci_0000_2B_00_1"
+GPU_MODULES="nvidia_drm nvidia_modeset nvidia_uvm nvidia"
+
+if [ "$GUEST_NAME" != "gpu_passthrough" ]; then
+    exit 0
+fi
+
+if [ "$HOOK_NAME" == "prepare" ] && [ "$STATE_NAME" == "begin" ]; then
+    # Unbind VTconsoles
+    echo 0 > /sys/class/vtconsole/vtcon0/bind
+    echo 0 > /sys/class/vtconsole/vtcon1/bind
+
+    # Unbind EFI Framebuffer
+    echo efi-framebuffer.0 > /sys/bus/platform/drivers/efi-framebuffer/unbind
+
+    # Stop plasma
+    systemctl --user --machine=kopatz@ stop plasma-\*
+    systemctl stop display-manager.service
+
+    sleep 2
+
+    # Start default network
+    virsh net-start default
+
+    # Unload AMDGPU kernel module
+    modprobe -r $GPU_MODULES
+
+    # Detach GPU from host
+    virsh nodedev-detach $GPU_PCI
+    virsh nodedev-detach $GPU_AUDIO_PCI
+
+    sleep 10
+
+    # Load VFIO kernel modules
+    modprobe vfio_pci
+    exit 0
+elif [ "$HOOK_NAME" == "release" ] && [ "$STATE_NAME" == "end" ]; then
+    # Stop default network
+    virsh net-destroy default
+
+    # Unload VFIO kernel modules
+    modprobe -r vfio-pci
+
+    # Reattach GPU TO host
+    virsh nodedev-reattach $GPU_PCI
+    virsh nodedev-reattach $GPU_AUDIO_PCI
+
+    sleep 5
+
+    # Load NVIDIA kernel modules
+    modprobe $GPU_MODULES
+
+    sleep 2
+
+    # Bind EFI Framebuffer
+    echo efi-framebuffer.0 > /sys/bus/platform/drivers/efi-framebuffer/bind
+
+
+    # Bind VTconsoles
+    echo 1 > /sys/class/vtconsole/vtcon0/bind
+    echo 1 > /sys/class/vtconsole/vtcon1/bind
+
+    # Start DM
+    systemctl start display-manager.service
+fi

modules/misc/virt-manager.nix

@@ -22,6 +22,22 @@ in
           ovmf.enable = true;
           ovmf.packages = [ pkgs.OVMFFull.fd ];
         };
+        hooks.qemu = {
+         # doesnt work, screen just freezes. no error in libvirt logs though, so idk how to fix it
+         "passthrough" = lib.getExe (
+          pkgs.writeShellApplication {
+            name = "qemu-hook";
+            excludeShellChecks = [ "SC2046" "SC2086" ];
+
+            runtimeInputs = with pkgs; [
+              libvirt
+              systemd
+              kmod
+            ];
+            text = builtins.readFile ./hook.sh;
+          }
+        );
+        };
       };
       spiceUSBRedirection.enable = true;
     };