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ARM64 Mitigation Posted For Spectre 4 / SSBD

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  • ARM64 Mitigation Posted For Spectre 4 / SSBD

    Phoronix: ARM64 Mitigation Posted For Spectre 4 / SSBD

    Following the Intel/AMD Spectre Variant 4 mitigation landing yesterday with "Speculative Store Bypass Disable" (SSBD) and then the POWER CPU mitigation landing today, ARM developers have posted their set of patches for 64-bit ARM CPUs to mitigate against this latest Spectre vulnerability around speculative execution...

    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

  • #2
    Am I right in speculating that ARM A53 and A55 are still unaffected?

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    • #3
      Originally posted by andreano View Post
      Am I right in speculating that ARM A53 and A55 are still unaffected?
      Correct. ARM updated their vulnerability table ( https://developer.arm.com/support/ar...-vulnerability ). All ARMv8 big cores (A57, A72, A73, A75) are affected, but all other are fine for this one.

      TL;DR low-end and some mid-end smartphones are still safe.

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      • #4
        my trusty old motorola e2 still safe knock on wood.

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        • #5
          For anyone looking for the meaning of that "Chicken Bit" reference - These are usually undocumented (publicly) toggles for disabling CPU features if they do not work - i.e. Chickening Out

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          • #6
            Mmmm KFC....

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