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Commit 755412e2 authored by Chris Wilson's avatar Chris Wilson Committed by Daniel Vetter
Browse files

drm/i915: Add an optional selection from i915 of CONFIG_MMU_NOTIFIER 



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: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1452503961-14837-3-git-send-email-chris@chris-wilson.co.uk
parent ea49c9ac

drivers/gpu/drm/i915/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -45,3 +45,14 @@ 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".