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Re:ZombieLoad: Cross Privilege-Boundary Data Leakage on Inte... by gok on Tuesday May 14, 2019 @05:53PM (#19914220)
In-order does not mean no speculative execution
Re:ZombieLoad: Cross Privilege-Boundary Data Leakage on Inte... by cfallin on Tuesday May 14, 2019 @05:56PM (#19914242)
Yes, but it typically means a significantly smaller speculative window -- rather than a ROB that can fill with several hundred instructions beyond a mispredicted branch, there is just the pipeline depth from fetch to commit worth of speculative work.