VFIO Success

scripts/hooks/win10-igpu/prepare/begin/start.sh

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+#!/bin/bash
+
+set -x
+
+# Load Variables
+source "/etc/libvirt/hooks/kvm.conf"
+
+# Unmount the Windows drive
+umount $WIN || /bin/true
+
+# Stop LightDM
+systemctl stop lightdm.service
+sleep 2
+
+# Calculate number of hugepages to allocate from memory (in MB)
+HUGEPAGES="$(($MEMORY/$(($(grep Hugepagesize /proc/meminfo | awk '{print $2}')/1024))))"
+
+echo "Allocating hugepages..."
+echo $HUGEPAGES > /proc/sys/vm/nr_hugepages
+ALLOC_PAGES=$(cat /proc/sys/vm/nr_hugepages)
+
+TRIES=0
+while (( $ALLOC_PAGES != $HUGEPAGES && $TRIES < 1000 ))
+do
+    echo 1 > /proc/sys/vm/compact_memory            ## defrag ram
+    echo $HUGEPAGES > /proc/sys/vm/nr_hugepages
+    ALLOC_PAGES=$(cat /proc/sys/vm/nr_hugepages)
+    echo "Succesfully allocated $ALLOC_PAGES / $HUGEPAGES"
+    let TRIES+=1
+done
+
+if [ "$ALLOC_PAGES" -ne "$HUGEPAGES" ]
+then
+    echo "Not able to allocate all hugepages. Reverting..."
+    echo 0 > /proc/sys/vm/nr_hugepages
+    exit 1
+fi
+
+# Unload all Nvidia drivers
+modprobe -r nvidia_drm
+modprobe -r nvidia_modeset
+modprobe -r nvidia_uvm
+modprobe -r nvidia
+
+# Unbind the GPU from display driver
+virsh nodedev-detach $VIRSH_GPU_VIDEO
+virsh nodedev-detach $VIRSH_GPU_AUDIO
+
+# Load VFIO kernel module
+modprobe vfio
+modprobe vfio_pci
+modprobe vfio_iommu_type1
+
+# Create looking glass shm
+systemd-tmpfiles --create /etc/tmpfiles.d/10-looking-glass.conf
+
+# Enable CPU governor performance mode
+cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
+for file in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do echo "performance" > $file; done
+cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
+
+# Isolate host
+systemctl set-property --runtime -- user.slice AllowedCPUs=12,13,14,15
+systemctl set-property --runtime -- system.slice AllowedCPUs=12,13,14,15
+systemctl set-property --runtime -- init.scope AllowedCPUs=12,13,14,15