The AMD Platform Security Processor (PSP) is a dedicated ARM CPU inside your AMD processor and runs undocumented, proprietary firmware provided by AMD.
It is a processor inside your processor that you don't control. It is essential for system startup. In fact, in runs before the main processor is even started and is responsible for bootstrapping all other components.
This talk presents our efforts investigating the PSP internals and functionality and how you can better understand it.
