Cheaper to keep the mitigations in place than to design around the side channel. Rearchitechting an entire CPU seems like it would be a boondoggle. Especially s

Cheaper to keep the mitigations in place than to design around the side channel. Rearchitechting an entire CPU seems like it would be a boondoggle. Especially since the well of side channels runs infinity deep unless you're back to single core, single thread CPUs. As soon as they 'fix' this side channel, another will be found. It's just an inevitability of multi-tennant processing. I'd have preferred a hardware flag that says "I accept that if untrusted code runs on this CPU, I've already lost" and keep the performance boosts of speculation, but alas.