lrc_ring_wa_bb_per_ctx
x = lrc_ring_wa_bb_per_ctx(engine);
GEM_BUG_ON(lrc_ring_wa_bb_per_ctx(engine) == -1);
regs[lrc_ring_wa_bb_per_ctx(engine) + 1] =
GEM_BUG_ON(lrc_ring_wa_bb_per_ctx(engine) == -1);
regs[lrc_ring_wa_bb_per_ctx(engine) + 1] =
lrc_ring_wa_bb_per_ctx(engine),