Re: Intel Xe SR-IOV support status

[Michal Wajdeczko]

Hi Marcello,

On 30.06.2025 13:47, Marcello Sylvester Bauer wrote:
> Hi,
> 
> Starting with Tiger Lake, support for GVT-g was discontinued in favor of
> SR-IOV for graphics virtualization[1]. Currently, the upstream Xe
> drivers only support SR-IOV on Panther Lake. The table below summarizes
> the current state based on the .has_sriov flag.
> 
> | Intel Gen | drm-xe-next[2] | xe-for-CI[2] | intel lts i915[3] |
> | --------- | -------------- | ------------ | ----------------- |
> | TGL       |             no | no           | v5.15             |
> | ADL/RPL   |             no | yes (debug)  | v5.15             |
> | MTL       |             no | no           | v6.1              |
> | ARL       |             no | no           | no                |
> | PTL       |        v6.13.1 | yes          | no                |

Note that we also have

  | ATSM      |             no | yes (debug)  |

> 
> Interestingly, the xe/topic/xe-for-CI testing branch only covers SR-IOV
> testing on the ADL platform and not the MTL or ARL platforms.
> 
> Is there a reason why SR-IOV has not yet been enabled on the other
> platforms? 

Since platforms before LNL are not officially supported by the Xe
driver, we have only enabled SR-IOV on those SDV platforms which are
actively used and tested by our public CI.


> Are there any plans or timeline for adding support for them?

AFAIK it’s unlikely. While in case of TGL the enabling is just a
one-liner patch with new .has_sriov flag, however for robust MTL it
would require much more SR-IOV specific code to be added, but there is
no point to add anything until those platforms itself will be fully
tested in the native mode (non-virtualized).

Michal

> 
> Kind regards,
> Marcello
> ---
> [1] https://www.intel.com/content/www/us/en/support/articles/000058558/
> graphics.html
> [2] https://gitlab.freedesktop.org/drm/xe
> [3] https://github.com/intel/linux-intel-lts
> [4] https://patchwork.freedesktop.org/patch/603316/