Originally Posted by Cheesethief
lv1 is the Hypervisor and lv2 is the GameOS.
Hypervisor basically prevents hacks. It makes sure everything is how it should be. Hypervisor is one of the main reasons savegame exploits will not work on a PS3 I believe. A reverse engineered Hypervisor is what allowed Linux on 3.55, Graf reversed it all by himself.
GameOS is just what it sounds like, it is what runs the games and it can be peek/poked to run back ups. That requires a CFW though I believe.
TL;DR - Having access to the Hypervisor and GameOS is awesome, thank this man for his dump.
If they have all this then why no one got RSX working in Linux and emulators?