SMM是什麽？
System Management Modeis an operating mode of x86 central processor units (CPUs) in which all normal execution, including the operating system, is suspended. An alternate software system which usually resides in the computer's firmware, SMI Handler, is then executed with high privileges. 
And this special CPU mode is transparent to OS and application.
CPU enters system management mode when it receives an SMI# interrupt which is sent from south brigdge (power management controller).
Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: SMM是什麽？ ### Response: System Management Modeis an operating mode of x86 central processor units (CPUs) in which all normal execution, including the operating system, is suspended. An alternate software system which usually resides in the computer's firmware, SMI Handler, is then executed with high privileges. 
And this special CPU mode is transparent to OS and application.
CPU enters system management mode when it receives an SMI# interrupt which is sent from south brigdge (power management controller). 