regVM_INVALIDATE_ENG0_ACK
SOC15_REG_OFFSET(GC, GET_INST(GC, i), regVM_INVALIDATE_ENG0_ACK);
SOC15_REG_OFFSET(MMHUB, 0, regVM_INVALIDATE_ENG0_ACK);
SOC15_REG_OFFSET(MMHUB, i, regVM_INVALIDATE_ENG0_ACK);