Rob Williams: AMD Confirms It Won't Opensource EPYC's Platform Security Processor Code. 19. Juli 2017; abgerufen im 1. Januar 1: „This chip is found on most AMD platforms from 2013 on, and behaves much like Intel's Management Engine does [...] The rather blunt realization that PSP wasn't being open sourced came out during a discussion with AMD top brass about EPYC.“
libreboot.org
Libreboot FAQ. Abgerufen im 1. Januar 1: „The PSP is an ARM core with TrustZone technology, built onto the main CPU die.“