Symbol: GEN8_OAHEADPTR
sys/dev/drm/i915/i915_perf.c
1441
I915_WRITE(GEN8_OAHEADPTR, gtt_offset);
sys/dev/drm/i915/i915_perf.c
830
I915_WRITE(GEN8_OAHEADPTR, head & GEN8_OAHEADPTR_MASK);