drm/i915: Don't try to place HWS in non-existing mappable region

HWS placement restrictions can't just rely on HAS_LLC flag.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191029095856.25431-5-matthew.auld@intel.com

drivers/gpu/drm/i915/gt/intel_engine_cs.c

@@ -528,7 +528,7 @@ static int pin_ggtt_status_page(struct intel_engine_cs *engine,
 	unsigned int flags;
 
 	flags = PIN_GLOBAL;
-	if (!HAS_LLC(engine->i915))
+	if (!HAS_LLC(engine->i915) && i915_ggtt_has_aperture(engine->gt->ggtt))
 		/*
 		 * On g33, we cannot place HWS above 256MiB, so
 		 * restrict its pinning to the low mappable arena.