Apple, Nvidia, Qualcomm, Marvell, and Cavium all make custom ARM cores and none of them have any info on whether their cores are affected by Spectre/Meltdown and available mitigations. Don't forget about non-Cortex cores!
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At this point in time, let’s just assume that anything using OOO = pwned. Anything not using OOO like Apple watch = not pwned.
For the basic misprediction attack, yes, assuming anything OOO is pwned is a pretty safe assumpion. But whether branch target injection and cross-privilege reads work or not is a very important question for OOO cores. Those aren't a given.
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Yeah.. will take time before folks figure out how ever single CPU implementation works and whether it’s exploitable or rather how..
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