so I've figured out how Intel ME manages to communicate while the CPU is sleeping or off: the PHY lets it rx/tx packets via *SMBus*pic.twitter.com/KlLHiStFBJ
Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.
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so I've figured out how Intel ME manages to communicate while the CPU is sleeping or off: the PHY lets it rx/tx packets via *SMBus*pic.twitter.com/KlLHiStFBJ
I love how badly written Intel ME firmware caused the PCH to overheat so they fixed it by adding automatic underclockingpic.twitter.com/XIEGts0uJd
Can you put an oven on it to get it to underclock ME to 0 Hz? :-)
there's a watchdog hidden somewhere that resets the entire system if ME is silent for half a hour
Reportedly the ME minimal boot blob turns that off, according to my reading of me_cleaner docs.
Yes. Intel botched the signing by making it per-module/partition.
I imagine it's not actually botched, but done deliberately to let OEMs select the features they want
I'll refrain from tweeting free consulting for Intel on how they could have "fixed" that. :-)
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