[Intel-gfx] [PATCH v6] drm/i915: enable to read CSB and CSB write pointer from HWSP in GVT-g VM

[Chris Wilson]

Quoting Weinan Li (2017-10-15 04:55:25)
> Let GVT-g VM read the CSB and CSB write pointer from virtual HWSP, not all
> the host support this feature, need to check the BIT(3) of caps in PVINFO.
> 
> v3 : Remove unnecessary comments.
> v4 : Separate VM enable patch with GVT-g implementation patch due to code
> dependency.
> v5 : Use inline for GVT virtual HWSP caps check function.
> v6 : Comments refine.
> 
> Signed-off-by: Weinan Li <weinan.z.li at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris