+
+Mediated Devices (vGPU, GVT-g)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Mediated devices are another method to use reuse features and performance from
+physical hardware for virtualized hardware. These are found most common in
+virtualized GPU setups such as Intels GVT-g and Nvidias vGPUs used in their
+GRID technology.
+
+With this, a physical Card is able to create virtual cards, similar to SR-IOV.
+The difference is that mediated devices do not appear as PCI(e) devices in the
+host, and are such only suited for using in virtual machines.
+
+
+Host Configuration
+^^^^^^^^^^^^^^^^^^
+
+In general your card's driver must support that feature, otherwise it will
+not work. So please refer to your vendor for compatbile drivers and how to
+configure them.
+
+Intels drivers for GVT-g are integraded in the Kernel and should work
+with the 5th, 6th and 7th generation Intel Core Processors, further E3 v4, E3
+v5 and E3 v6 Xeon Processors are supported.
+
+To enable it for Intel Graphcs, you have to make sure to load the module
+'kvmgt' (for example via `/etc/modules`) and to enable it on the Kernel
+commandline. For this you can edit `'/etc/default/grub'' and add the following
+to the 'GRUB_CMDLINE_LINUX_DEFAULT' variable:
+
+----
+ i915.enable_gvt=1
+----
+
+After that remember to
+xref:qm_pci_passthrough_update_initramfs[update the `initramfs`],
+xref:qm_pci_passthrough_update_grub[update grub] and
+reboot your host.
+
+VM Configuration
+^^^^^^^^^^^^^^^^
+
+To use a mediated device, simply specify the `mdev` property on a `hostpciX`
+VM configuration option.
+
+You can get the supported devices via the 'sysfs'. For example, to list the
+supported types for the device '0000:00:02.0' you would simply execute:
+
+----
+# ls /sys/bus/pci/devices/0000:00:02.0/mdev_supported_types
+----
+
+Each entry is a directory which contains the following important files:
+
+* 'available_instances' contains the amount of still available instances of
+this type, each 'mdev' use in a VM reduces this.
+* 'description' contains a short description about the capabilities of the type
+* 'create' is the endpoint to create such a device, {pve} does this
+automatically for you, if a 'hostpciX' option with `mdev` is configured.
+
+Example configuration with an `Intel GVT-g vGPU` (`Intel Skylake 6700k`):
+
+----
+# qm set VMID -hostpci0 00:02.0,mdev=i915-GVTg_V5_4
+----
+
+With this set, {pve} automatically creates such a device on VM start, and
+cleans it up again when the VM stops.
+
+ifdef::wiki[]
+
+See Also
+~~~~~~~~
+
+* link:/wiki/Pci_passthrough[PCI Passthrough Examples]
+
+endif::wiki[]