osfmk/man/processor_start.html
Function - Start a processor.
**#include<mach/mach\_host.h>**** kern\_return\_t processor\_start****(processor\_t**processor**);**
processor[in processor send right] The processor to be controlled.
The processor_start function allows privileged software to start a processor in a multi-processor that so allows it. A newly started processor is assigned to the default processor set. The interpretation of this operation is machine dependent.
This operation is machine dependent. It may do nothing.
The ability to restart an exited processor is machine dependent.
KERN_FAILURE The operation was not performed. A likely reason is that it is not supported on this processor.
Functions: processor_control, processor_exit, processor_info, host_processors.