sma: share memory architecture，共享内存结构
std(suspend to disk，磁盘唤醒)
str(suspend to ram，内存唤醒)
svr: switching voltage regulator(交换式电压调节)
usb(universal serial bus，通用串行总线)
usdm(unified system diagnostic manager，统一系统监测管理器)
vid(voltage identification definition，电压识别认证)
vrm (voltage regulator module，电压调整模块)
zif: zero insertion force， 零插力
