> Search for "AMD PSP".

To quote https://news.ycombinator.com/item?id=14803645

"AMD seems not to use the brand name "AMD PSP" anymore. Instead some years ago they began to use the name "AMD Secure Processor". Nevertheless it is just the same: Read the small footnote at http://www.amd.com/en-gb/innovations/software-technologies/s... which begins with 'AMD Secure Processor (formerly “Platform Security Processor” or “PSP”)'."