diff options
Diffstat (limited to 'core/modules/qemu/data/opt/openslx/vmchooser/plugins/qemukvm/includes/passthrough-mdev.inc')
| -rw-r--r-- | core/modules/qemu/data/opt/openslx/vmchooser/plugins/qemukvm/includes/passthrough-mdev.inc | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/core/modules/qemu/data/opt/openslx/vmchooser/plugins/qemukvm/includes/passthrough-mdev.inc b/core/modules/qemu/data/opt/openslx/vmchooser/plugins/qemukvm/includes/passthrough-mdev.inc new file mode 100644 index 00000000..067cc35d --- /dev/null +++ b/core/modules/qemu/data/opt/openslx/vmchooser/plugins/qemukvm/includes/passthrough-mdev.inc @@ -0,0 +1,163 @@ +# ----------------------------------------------------------------------------- +# +# Copyright (c) 2009..2021 bwLehrpool-Projektteam +# +# This program/file is free software distributed under the GPL version 2. +# See https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html +# +# If you have any feedback please consult https://bwlehrpool.de and +# send your feedback to support@bwlehrpool.de. +# +# General information about bwLehrpool can be found at https://bwlehrpool.de +# +# ----------------------------------------------------------------------------- +# Utils and functions to setup mediated device passthrough (Intel GVT-g) +# ----------------------------------------------------------------------------- + +# Function to get state of passthrough +# Return : 0 (true) if passthrough is enabled, otherwise 1 (false) +function passthrough_mdev_enabled() { + local passthrough_iommu="$(kernel_cmdln_parse_option "iommu")" + local intel_gvt="$(kernel_cmdln_parse_option "i915.enable_gvt")" + if [ "${passthrough_iommu}" == "pt" ] && [ "${intel_gvt}" -eq 1 ]; then + return 0 + else + return 1 + fi +} + +# Function to check validitiy of the passthrough configuration +# Return : 0 (true) if passthrough is configured properly, otherwise 1 (false) +function passthrough_mdev_check() { + local passthrough_iommu_intel="$(kernel_cmdln_parse_option "intel_iommu")" + local passthrough_iommu_amd="$(kernel_cmdln_parse_option "amd_iommu")" + if [ "${passthrough_iommu_intel}" != "on" ] && [ "${passthrough_iommu_amd}" != "on" ]; then + return 1 + else + return 0 + fi +} + +# Function to list all physical devices that support mediated device passthrough +# Return : list of PCI addresses from devices that support mediated device passthrough +function passthrough_mdev_devices() { + mdevctl types --dumpjson | jq -r ".[] | keys | .[]" +} + +# Function to check if a physical device, that supports mediated device passthrough, is an Intel integrated GPU +# Parameter 1: PCI address of the physical device that supports mediated device passthrough +# Return : 0 (true) if physical device is an Intel integrated GPU, otherwise 1 (false) +function passthrough_mdev_device_is_intel_igd() { + local pt_mdev_device_pci_info="$(lspci -vmm -n -s "${1}")" + local pt_mdev_device_pci_vendor="$(awk '$1 = /^Vendor:/ {print $2}' <<< "${pt_mdev_device_pci_info}")" + local pt_mdev_device_pci_class="$(awk '$1 = /^Class:/ {print $2}' <<< "${pt_mdev_device_pci_info}")" + if [ "${pt_mdev_device_pci_vendor}" = "8086" ] && [ "${pt_mdev_device_pci_class}" = "0300" ]; then + return 0; + else + return 1; + fi +} + +# Function to get the first physical device that supports mediated device passthrough and is an Intel integrated GPU +# Return : PCI address of the physical device that supports mediated device passthrough and is an Intel integrated GPU +function passthrough_mdev_device_get_intel_igd() { + local pt_mdev_devices_addresses=($(passthrough_mdev_devices)) + for pt_mdev_device_address in ${pt_mdev_devices_addresses[@]}; do + # check if device is an Intel integrated GPU + if passthrough_mdev_device_is_intel_igd "${pt_mdev_device_address}"; then + echo "${pt_mdev_device_address}" + return 0; + fi + done + + return 1; +} + +# Function to list all mediated device instance types of a specified physical device +# Parameter 1: PCI address of the physical device that supports mediated device passthrough +# Return : list of mediated device instance types supported by the specified physical device +function passthrough_mdev_types() { + mdevctl types --dumpjson | jq -r ".[] | .\"${1}\" | .[] | keys | .[]" +} + +# Function to get the first mediated device instance type of a specified physical device +# Parameter 1: PCI address of the physical device that supports mediated device passthrough +# Return : first mediated device instance type supported by the specified physical device +function passthrough_mdev_type_get() { + local pt_mdev_device_types=($(passthrough_mdev_types "${1}")) + if [ "${#pt_mdev_device_types[@]}" -gt 0 ]; then + echo "${pt_mdev_device_types[0]}" + return 0; + else + return 1; + fi +} + +# Function to get the description of a specified mediated device instance type +# Parameter 1: PCI address of the physical device that supports mediated device passthrough +# Parameter 2: mediated device instance type supported by the specified physical device +# Return : description of the mediated device instance type supported by the specified physical device +function passthrough_mdev_type_description() { + mdevctl types --dumpjson | jq -r ".[] | .\"${1}\" | .[] | select(.\"${2}\") | .[] | .\"description\"" +} + +# Function to get the available instance count of a specified mediated device instance type +# Parameter 1: PCI address of the physical device that supports mediated device passthrough +# Parameter 2: mediated device instance type supported by the specified physical device +# Return : available instances of the mediated device instance type supported by the specified physical device +function passthrough_mdev_type_num_instances() { + mdevctl types --dumpjson | jq -r ".[] | .\"${1}\" | .[] | select(.\"${2}\") | .[] | .\"available_instances\"" +} + +# Function to create a new mediated device instance +# Parameter 1: PCI address of the physical device that supports mediated device passthrough +# Parameter 2: mediated device instance type supported by the specified physical device +# Parameter 3: UUID for the created mediated device instance +function passthrough_mdev_instance_create() { + mdevctl start --parent "${1}" --type "${2}" --uuid "${3}" +} + +# Function to delete an existing mediated device instance +# Parameter 1: UUID of the existing mediated device instance +function passthrough_mdev_instance_delete() { + mdevctl stop --uuid "${1}" +} + +# Function to obtain mediated device UUID of a globally created mediated device (Intel GVT-g) instance for passthrough +# Return : mediated device UUID of a globally created mediated device (Intel GVT-g) instance +function passthrough_mdev_instance_get() { + local passthrough_mdev_instances=($(mdevctl list | cut -d ' ' -f 1)) + if [ "${#passthrough_mdev_instances[@]}" -eq 1 ]; then + echo "${passthrough_mdev_instances[0]}" + return 0; + else + return 1; + fi +} + +# Function to setup mediated device passthrough +# Return : mediated device ID of the specified and configured mediated device (Intel GVT-g instance) for passthrough +function passthrough_mdev_setup() { + # check if passthrough is enabled + if passthrough_mdev_enabled; then + # check if passthrough is configured properly + if ! passthrough_mdev_check; then + return 1; + fi + + writelog "Passthrough of mediated devices (mdev) is enabled successfully" + + # obtain created mediated device for passthrough + local pt_gpu_mdev_id="$(passthrough_mdev_instance_get)" + + # check if mediated device ID could be obtained + if [ -z "${pt_gpu_mdev_id}" ]; then + writelog "Failed to obtain created mediated device UUID" + return 2; + fi + + echo "${pt_gpu_mdev_id}" + fi + + return 0; +} |