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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...

    http://www.phoronix.com/scan.php?pag...pectre-V4-SSBD

  • #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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