> So one could guess the CPU is in such state before the operating system gets loaded. That would be an incorrect guess. Getting into this mode requires the co

> So one could guess the CPU is in such state before the operating system gets loaded. That would be an incorrect guess. Getting into this mode requires the cooperation of the ME. If you're Intel then that means you use parts with different fusing and boot some magic ME firmware that lets you do this. If you're not, you exploit a vulnerability in the ME (something that's currently only possible on older hardware) to do so. You can't enable this by simply replacing the bootloader.