[RFC 02/13] drm/i915/svm: Define SVM UAPI

[Joonas Lahtinen]

Quoting Niranjana Vishwanathapura (2019-11-22 22:57:23)
> Define UAPI for Shared Virtual Memory (SVM) fucntionality including
> SVM capability and configurability.
> When there is no GPU page fault support available, add ioctls
> to explicitly bind and migrate virtual address ranges.
> 
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> Cc: Jon Bloomfield <jon.bloomfield at intel.com>
> Cc: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Sudeep Dutt <sudeep.dutt at intel.com>
> Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura at intel.com>
> Signed-off-by: Venkata Sandeep Dhanalakota <venkata.s.dhanalakota at intel.com>

Having this as a separate commit ahead of the functionality breaks
bisecting.

The uAPI should be exposed in similar sized chunks as it's implemented.
If it has to go in as single patch, that should be after all the
plumbing is already in place.

That also gives a clear indication to anybody backporting that you
need to backport until the uAPI patch.

Regards, Joonas