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AMD Branch Sampling Support Being Worked On For Linux

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  • dev_null
    replied
    Nice, it means reverse debugging can be better and faster

    Leave a comment:


  • Developer12
    replied
    Originally posted by Zgembo View Post
    So, another source of data for side-channel attacks?
    No. This will probably be privileged and seems to really just be exporting the data the branch predictor collects. (vs Spectre v2, which poisons the BP to manipulate speculative threads)

    And I'm guessing it only works if the branches are actually taken (vs retpoline, which removes them in cases where it's used instead of IBPB).

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  • Zgembo
    replied
    So, another source of data for side-channel attacks?

    Leave a comment:


  • phoronix
    started a topic AMD Branch Sampling Support Being Worked On For Linux

    AMD Branch Sampling Support Being Worked On For Linux

    Phoronix: AMD Branch Sampling Support Being Worked On For Linux

    A new kernel patch series was posted this morning working on AMD Branch Sampling "BRS" support...

    https://www.phoronix.com/scan.php?pa...ranch-Sampling
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