• evatronic@lemm.ee
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      1 year ago

      It’s worth noting these are the firmware / microcode fixes.

      There’s already a software solution available,

      There is a software workaround, you can set the chicken bit DE_CFG[9]. This may have some performance cost, and the microcode update is preferred.

      source: https://www.openwall.com/lists/oss-security/2023/07/24/3

      AMD has also already released a fix for the big boy - the EPYC processor.

      • Dr. Dabbles@lemmy.world
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        1 year ago

        The MSR bit is potentially a large performance loss and AMD recommends their partners not use it. In my tests is was 5-15% on EPYC depending on workload. “Some performance cost” is really hiding the reality of that bit.