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title: Virtual Function I/O Mediated devices (vfio-mdev) title: Virtual Function I/O Mediated devices (vfio-mdev)
description: Create and Configure Virtual Function I/O Mediated devices (vfio-mdev) description: Create and Configure Virtual Function I/O Mediated devices (vfio-mdev)
published: true published: true
date: 2022-07-28T01:25:56.298Z date: 2023-01-29T20:12:01.722Z
tags: tags:
editor: markdown editor: markdown
dateCreated: 2022-07-21T21:10:41.046Z dateCreated: 2022-07-21T21:10:41.046Z
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# Configure Virtual Function I/O Mediated devices # Configure Virtual Function I/O Mediated devices
> *These instructions only cover Intel GPUs that are compatible with vfio-mdev (5th to 10th generation). Since generation 11th, vfio-mdev has been replaced by SR-IOV.* > These instructions only cover Intel GPUs that are compatible with vfio-mdev (5th to 10th generation). Since generation 11th, vfio-mdev has been superseded by SR-IOV.
{.is-warning} {.is-warning}
GPUs compatible with [Virtual Function I/O Mediated devices](https://www.kernel.org/doc/html/latest/driver-api/vfio-mediated-device.html) (vfio-mdev) can be split into multiple virtual GPUs (vGPUs). GPUs compatible with [Virtual Function I/O Mediated devices](https://www.kernel.org/doc/html/latest/driver-api/vfio-mediated-device.html) (vfio-mdev) can be split into multiple virtual GPUs (vGPUs).
vGPUs can be assigned to virtual machines or containers. In turned, these vGPUs can then be assigned to virtual machines or containers.
Contrary to paravirtualized GPUs (e.g. virtio-gpu), virtual GPUs do not need specialized drivers.
*How to do so?* *How to do so?*
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* Make sure the GRUB has been updated after [the first boot](https://wiki.phyllo.me/getstarted/disk#update-grub-and-reboot) * Make sure the GRUB has been updated after [the first boot](https://wiki.phyllo.me/getstarted/disk#update-grub-and-reboot)
### Modify the system allocated to the GPU in the BIOS/UEFI ### Modify the system allocated to the GPU in the BIOS/UEFI
> Some computers allow you to modify the system memory allocated or shared with the integrated GPU, which may allow you to create more vGPUs. > Some computers allow you to modify the system memory allocated or shared with the integrated GPU, which may allow you to create more vGPUs.
{.is-info} {.is-info}
> For Intel integrated graphics cards only; rarely available on laptops computers.
{.is-warning}
* Before the host operating system boots up, you need to enter the BIOS/UEFI and to look for a setting called *GPU aperture size*, or *GPU shared memory*. * Before the host operating system boots up, you need to enter the BIOS/UEFI and to look for a setting called *GPU aperture size*, or *GPU shared memory*.
* Use the highest possible value. * Use the highest possible value.
> System memory will be reserved for the GPU, so make sure you have enough system memory to accomodate both the GPU and your operating system. > System memory will be reserved for the GPU, so make sure you have enough system memory to accomodate both the GPU and your operating system.
{.is-warning} {.is-info}
## Create a virtual GPU ## Create a virtual GPU