RING_CTX_TIMESTAMP
*cs++ = i915_mmio_reg_offset(RING_CTX_TIMESTAMP(0));
*cs++ = i915_mmio_reg_offset(RING_CTX_TIMESTAMP(0));
RING_CTX_TIMESTAMP(engine->mmio_base),
i915_mmio_reg_offset(RING_CTX_TIMESTAMP(engine->mmio_base)),
*cs++ = i915_mmio_reg_offset(RING_CTX_TIMESTAMP(rq->engine->mmio_base));
REG32_IDX(RING_CTX_TIMESTAMP, BLT_RING_BASE),