Next Linux Kernel Bringing "Speculative Store Bypass Safe" For ARMv8.5

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2018-Oct-07 | Tags: kernel

Linux on ARMSpeculative Store Bypass Safe (SSBS) is a new bit added with ARMv8.5-A for SoCs moving forward like the ARM Cortex-A76 as a means for mitigation against Spectre V4.

Queued within the ARM64/AArch64 for the upcoming Linux 4.20~5.0 cycle is detection for SSBS and the ability to advertise its presence to user-space. This Speculative Store Bypass Safe functionality relies on the ARM Linux infrastructure that's already existing for Speculative Store Bypass Disable (SSBD).


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