Originally posted by orzel
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I've yet to see any in-the-wild (actively used malware) that exploits HT speculative execution vulnerabilities, however, because there's so much low hanging fruit out there already that targeting specific CPU model groups is going to be hit or miss. It's far more easy to target OS vulnerabilities, social engineering, and especially misconfigurations where you're practically guaranteed penetration.
That said, usually it's just a matter of picking the right power management profile to get reasonable performance v. energy efficiency & thermal management. It's pretty extreme to actively disable certain functions entirely.
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