GEN2_IMR
intel_uncore_write(engine->uncore, GEN2_IMR, engine->i915->gen2_imr_mask);
intel_uncore_posting_read_fw(engine->uncore, GEN2_IMR);
intel_uncore_write(engine->uncore, GEN2_IMR, engine->i915->gen2_imr_mask);
#define GEN2_IRQ_REGS I915_IRQ_REGS(GEN2_IMR, \