privileged mode

基本解释

Another issue mentioned by the authors is that the device drivers run in privileged mode inside the OS, but they have become increasingly complicated.
作者提到的另一个问题是，设备驱动在操作系统中是运行在特权模式中的，但是它们变得越来越复杂。
Some kernel code is needed to use the SPUs from a Linux application, since the controlling registers are only accessible from the PPE in privileged mode.
在 Linux 程序中使用 SPU 需要使用一部分内核代码，因为控制寄存器只能从 PPE 中使用特权模式进行访问。
Recall that kernel mode represents the privileged mode for code execution, while user mode represents the non-privileged mode (for programs running outside the kernel).
回想一下内核模式表示代码执行的特权模式，而用户模式则表示非特权模式（用于那些运行在内核之外的程序）。