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Spectre / Variant 2 Mitigation with IBRS
Automatisch alle 5 Minuten aktualisiert

CPU

Microcode update

Use retpoline

IBRS Dynamic

IBRS Always On

non-Intel

?

Yes, default to conservative?

?

?

All Current Intel CPUs

Yes

Yes, Default 

If IBRS available, users can opt-in

Opt-in if more paranoid

Future Work

N/A

Not needed, but not harmful

Not recommended

Default if CPU enumerates “cheaper” IBRS