New x86 micro-op vulnerability breaks all known Spectre defenses

Re:New x86 micro-op vulnerability breaks all known Spectre d... by grishka on Saturday May 01, 2021 @09:00AM (#27005952)

So ARM CPUs do have microcode after all?

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Re:New x86 micro-op vulnerability breaks all known Spectre d... by mhh__ on Saturday May 01, 2021 @09:57AM (#27006347)

Microcode != Using micro-ops.

Microcode has been around for half a century at least, much longer than micro-ops.

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Re:New x86 micro-op vulnerability breaks all known Spectre d... by grishka on Saturday May 01, 2021 @12:16PM (#27007467)

Uh. I thought that micro-ops were literally microcode instructions/operations?

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Re:New x86 micro-op vulnerability breaks all known Spectre d... by mhh__ on Saturday May 01, 2021 @12:40PM (#27007674)

In a modern processor they are however microcode as a general term is a catch-all term which basically means non-trivial configuration logic stored in somewhere not meant to be touched by people other than the vendor. I think IBM have millicode.

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Re:New x86 micro-op vulnerability breaks all known Spectre d... by orge on Sunday May 02, 2021 @08:55PM (#27020522)

nanocode?

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