According to the isolation positions of device drivers, the device driver framework can be classified into three types: kernel mode driver, user mode driver and virtual machine based driver.
目前，对设备驱动可靠性的研究着重于设备驱动与操作系统内核的有效分离，设备驱动框架按照驱动被隔离所处位置大致可分为内核态、用户态和虚拟机三种。
The Linux card services core interacts with the host controller device driver, the card device drivers, and the user mode cardmgr daemon.
linux卡服务核心与主机控制器设备驱动程序、卡设备驱动程序及用户模式cardmgr后台进程交互。
KQEMU is a driver (kernel module for Linux) that allows user-mode code and kernel code to execute directly on the host CPU.
KQEMU是一个驱动程序(Linux的内核模块)，允许用户模式的代码和内核代码直接在主机CPU上执行。
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