CTX_RING_CTL
regs[CTX_RING_CTL] = RING_CTL_SIZE(ring->size) | RING_VALID;
if ((regs[CTX_RING_CTL] & ~(RING_WAIT | RING_WAIT_SEMAPHORE)) !=
regs[CTX_RING_CTL],
regs[CTX_RING_CTL] = RING_CTL_SIZE(ring->size) | RING_VALID;
CTX_RING_CTL - 1,
xe_lrc_write_ctx_reg(lrc, CTX_RING_CTL,