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Linux Kernel Patches Updated for x86/x86_64 SLS Mitigation

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  • #1

    Linux Kernel Patches Updated for x86/x86_64 SLS Mitigation

    Phoronix: Linux Kernel Patches Updated for x86/x86_64 SLS Mitigation

    With GCC 12 having added a new option to enable Straight Line Speculation "SLS" mitigation for x86/x86_64 CPUs, Linux kernel developers are preparing to enable this new compiler feature for further reducing undesirable speculation exposure...

    Linux Kernel Patches Updated for x86/x86_64 SLS Mitigation - Phoronix
    https://www.phoronix.com/scan.php?page=news_item&px=Linux-Patch-x86-SLS-Patch-Up
    Phoronix, Linux Hardware Reviews, Linux hardware benchmarks, Linux server benchmarks, Linux benchmarking, Desktop Linux, Linux performance, Open Source graphics, Linux How To, Ubuntu benchmarks, Ubuntu hardware, Phoronix Test Suite
    Tags: None
  • #2
    Performance?

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    • #3
      INT3? That's a debug breakpoint. I'm not nearly as knowledgeable as the people working on this mitigation, but using something like INT3 for this seems a bit hacky...

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      • #4
        Originally posted by milkylainen View Post
        Performance?
        As I understand it, it's not actually changing any code that executes, just adding dummy INT3s to prevent speculative execution of anything beyond. So there should be no performance impact.

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