Thread time! Why can't they just quickly patch #meltdown or #spectre and push out another cpu? Why could it possibly take years? Why don't they use AGILE or x/y/z? Lots of reasons:
(note: my goal is not to criticize chip manufacturers - it's to defend the constraints they have)
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OK, the document you linked suggests a mitigation, but it's a non-solution; it requires all-new software and leaves it unsafe to run existing binaries.
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The mitigation also requires individual arch-specific hacks in every piece of software that might ever be affected, at every point where it might be affected. It's not a solution.
End of conversation
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