From fce0063f44cd22a01d983951b903be2e8cbc93a7 Mon Sep 17 00:00:00 2001
From: HikariKnight <2557889+HikariKnight@users.noreply.github.com>
Date: Tue, 1 Mar 2022 09:02:29 +0100
Subject: [PATCH] update information to the user

---
 lib/set_MODULES.sh |  2 ++
 vfio-verify        | 11 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/lib/set_MODULES.sh b/lib/set_MODULES.sh
index c181474..aad04cd 100755
--- a/lib/set_MODULES.sh
+++ b/lib/set_MODULES.sh
@@ -43,6 +43,8 @@ vfio_virqfd
     printf "# This is an autogenerated file that stubs your graphic card for use with vfio
 # This file should be placed inside /etc/modprobe.d/
 options vfio_pci ids=$GPU_DEVID
+
+# Make sure vfio_pci is loaded before these modules: nvidia, nouveau, amdgpu and radeon
 softdep nvidia pre: vfio vfio_pci
 softdep nouveau pre: vfio vfio_pci
 softdep amdgpu pre: vfio vfio_pci
diff --git a/vfio-verify b/vfio-verify
index 5ef8d92..d9cb3d4 100755
--- a/vfio-verify
+++ b/vfio-verify
@@ -4,14 +4,25 @@
 SCRIPTDIR=$(dirname `which $0`)
 cd $SCRIPTDIR
 
+# If there is a config generated, then $SCRIPTDIR/config/kernel_args
+# should exist, which contains all the info we need
 if [ -f $SCRIPTDIR/config/kernel_args ];
 then
+    # Fetch part of the device id we need
     DEVID=$(cat $SCRIPTDIR/config/kernel_args | cut -d " " -f 3 | cut -d "=" -f 2 | perl -pe "s/^([0-9a-f]{4}:).*/\1/")
     echo "#------------------------------------------#"
+    # List info about the vfio gpu and what kernel driver is being used
     lspci -d $DEVID -v | grep -iP "kernel driver|amd|radeon|nvidia|nouveau" | grep -vi "kernel modules"
     echo "#------------------------------------------#"
 
     printf "
 If the \"Kernel driver in use\" for these devices are \"vfio-pci\", then VFIO has been successfully enabled!
+If the system freezes when you start a VM with the passthrough then you might need to force disable video output
+for the card on boot (or if you do not have another GPU from the same vendor (AMD/NVIDIA), you can blacklist the driver).
 "
+
+else
+    # Tell user to run the setup first if the kernel_args file is not found
+    echo "Please run \"$SCRIPTDIR/vfio-setup\" first!"
+
 fi  
\ No newline at end of file