drm/i915: Don't allocate context pages as mappable

Only the hardware really access them, so no need to have cpu
gtt access available.

Split out from Chris vma-bind rework.

Note that this is only possible due to the split-up of the mappable
pin flag into PIN_GLOBAL and PIN_MAPPABLE.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ben Widawsky <benjamin.widawsky@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 1366470..a6b877a 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2741,7 +2741,7 @@ intel_alloc_context_page(struct drm_device *dev)
                return NULL;
        }
 
-       ret = i915_gem_obj_ggtt_pin(ctx, 4096, PIN_MAPPABLE);
+       ret = i915_gem_obj_ggtt_pin(ctx, 4096, 0);
        if (ret) {
                DRM_ERROR("failed to pin power context: %d\n", ret);
                goto err_unref;