Re: [Intel-gfx] [PATCH 1/3] drm/i915: Exclude reserved stolen from driver use

[Andi Shyti <andi.shyti@linux.intel.com>]

On Wed, Dec 08, 2021 at 08:27:58PM +0530, Ramalingam C wrote:
> From: Chris Wilson <chris@chris-wilson.co.uk>
> 
> Remove the portion of stolen memory reserved for private use from driver
> access.
> 
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> cc: Matthew Auld <matthew.auld@intel.com>
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Matthew Auld <matthew.auld@intel.com>
> ---
>  drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
> index bce03d74a0b4..6ea3ca21cdf3 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
> @@ -488,6 +488,9 @@ static int i915_gem_init_stolen(struct intel_memory_region *mem)
>  		return 0;
>  	}
>  
> +	/* Exclude the reserved region from driver use */
> +	mem->region.end = reserved_base - 1;
> +
>  	/* It is possible for the reserved area to end before the end of stolen
>  	 * memory, so just consider the start. */
>  	reserved_total = stolen_top - reserved_base;
> -- 
> 2.20.1