== DF-3945: CVE-2019-14615 carriage check ==
-- gen9_init_indirectctx_bb body (should contain WaClearSlmSpace unconditional pipe control per upstream bc8a76a152c5):
29:	batch = gen8_emit_flush_coherentl3_wa(engine, batch);
31:	batch = emit_lri(batch, lri, ARRAY_SIZE(lri));
33:	/* WaClearSlmSpaceAtContextSwitch:kbl */

-- gen8_init_indirectctx_bb body (gen8 HAS the cleardown):
10:	/* WaClearSlmSpaceAtContextSwitch:bdw,chv */
12:	batch = gen8_emit_pipe_control(batch,
13:				       PIPE_CONTROL_FLUSH_L3 |

-- any other PIPE_CONTROL_FLUSH_L3 cleardown for gen9 outside KBL_A0 gate:
1512:				       PIPE_CONTROL_FLUSH_L3 |
1589:					       PIPE_CONTROL_FLUSH_L3 |