[Intel-gfx] [PATCH 003/190] drm/i915: Add an optional selection from i915 of CONFIG_MMU_NOTIFIER

[Daniel Vetter]

On Mon, Jan 11, 2016 at 09:16:14AM +0000, Chris Wilson wrote:
> userptr requires mmu-notifier for full unprivileged support. Most
> systems have mmu-notifier support already enabled as a requirement for
> virtualisation support, but we should make the option for i915 to take
> advantage of mmu-notifiers explicit (and enable by default so that
> regular userspace can take advantage of passing client memory to the
> GPU.)
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Tvrtko Ursulin <tvrtko.ursulin at linux.intel.com>
> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at linux.intel.com>

Queued for -next, thanks for the patch.
-Daniel

> ---
>  drivers/gpu/drm/i915/Kconfig | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
> index fcd77b27514d..b979295aab82 100644
> --- a/drivers/gpu/drm/i915/Kconfig
> +++ b/drivers/gpu/drm/i915/Kconfig
> @@ -48,3 +48,14 @@ config DRM_I915_PRELIMINARY_HW_SUPPORT
>  	  option changes the default for that module option.
>  
>  	  If in doubt, say "N".
> +
> +config DRM_I915_USERPTR
> +	bool "Always enable userptr support"
> +	depends on DRM_I915
> +	select MMU_NOTIFIER
> +	default y
> +	help
> +	  This option selects CONFIG_MMU_NOTIFIER if it isn't already
> +	  selected to enabled full userptr support.
> +
> +	  If in doubt, say "Y".
> -- 
> 2.7.0.rc3
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch