[Intel-gfx] [PATCH v2] drm/i915: add support for perf configuration queries

[Joonas Lahtinen]

Quoting Lionel Landwerlin (2018-06-12 19:54:41)
> Listing configurations at the moment is supported only through sysfs.
> This might cause issues for applications wanting to list
> configurations from a container where sysfs isn't available.
> 
> This change adds a way to query the number of configurations and their
> content through the i915 query uAPI.
> 
> v2: Fix sparse warnings (Lionel)
>     Add support to query configuration using uuid (Lionel)
> 
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>

For uAPI changes, please always reference the respective userspace
patches and it's bonus if the patch title is in the fashion of
"Add perf configuration query uAPI" for easy spotting by maintainers.
Now it's only the last word of the commit message that highlights it's
about new "uAPI".

Regards, Joonas