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title: Virtual Function I/O Mediated devices (vfio-mdev)
description: Create and Configure Virtual Function I/O Mediated devices (vfio-mdev)
published: true
date: 2025-03-31T17:18:30.931Z
date: 2025-03-31T17:21:00.391Z
tags:
editor: markdown
dateCreated: 2022-07-21T21:10:41.046Z
@ -13,7 +13,7 @@ dateCreated: 2022-07-21T21:10:41.046Z
> 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 Since generation 11th, *vfio-mdev* has been superseded by *SR-IOV*.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}
[Virtual Function I/O Mediated devices](https://www.kernel.org/doc/html/latest/driver-api/vfio-mediated-device.html) (vfio-mdev) allows a phyiscal GPU to be split into multiple virtual GPUs (vGPU). Such a vGPU can then be assigned to a virtual machine or a container.
[Virtual Function I/O Mediated devices](https://www.kernel.org/doc/html/latest/driver-api/vfio-mediated-device.html) (vfio-mdev) allows a physical GPU to be split into multiple virtual GPUs (vGPU). Such a vGPU can then be assigned to a virtual machine or a container.
Contrary to paravirtualized GPUs (e.g. *virtio-gpu*), vGPUs can use the same driver as their parent GPU (e.g. a guest compatible with an Intel GPUs will be able to leverage an Intel-based vGPUs)
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* Before the host operating system boots up, enter the BIOS/UEFI and look for a setting called *GPU aperture size* or *GPU shared memory*
* Use the highest possible value, but not higher than the available system memory.
* Use the highest possible value, but not higher than the available system memory
> 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. For instance, if you have a total of 16GB of system memory, it is recommanded to not allocate more than 4GB to the GPU.
{.is-warning}
> 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. For instance, if you have a total of 16GB of system memory, it is recommended to allocate no more than 4GB to the GPU
{.is-info}
## Resources