Intel Xe SR-IOV support status

[Marcello Sylvester Bauer]

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                |

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

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/
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