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How to disable the branch prediction on armv8

Rifakst

Hello,

I am working with ARMV8 Cortex A72 architecture,
i want to know can i turn off branch prediction?
and how can i do it?

best regards,

Parents
  • 0

    I guess it can't (ARM 100095_0003_06_en):
    6.5.5  Enabling program flow prediction
     
    Program flow prediction is always enabled and no programming is required to take advantage of
    program flow prediction.
    When reset, the processor:
    • Invalidates the BTB.
    • Resets the GHB and indirect predictor to a known state.
    No software intervention is required to prepare the prediction logic before enabling program flow
    prediction.

Reply
  • 0

    I guess it can't (ARM 100095_0003_06_en):
    6.5.5  Enabling program flow prediction
     
    Program flow prediction is always enabled and no programming is required to take advantage of
    program flow prediction.
    When reset, the processor:
    • Invalidates the BTB.
    • Resets the GHB and indirect predictor to a known state.
    No software intervention is required to prepare the prediction logic before enabling program flow
    prediction.

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