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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: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1452503961-14837-3-git-send-email-chris@chris-wilson.co.uk
hifive-unleashed-5.1
Chris Wilson 2016-01-11 09:16:14 +00:00 committed by Daniel Vetter
parent ea49c9acf2
commit 755412e29c
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/i915/Kconfig
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@ -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".