AMD: Predictive Store Forwarding PSF

grarpamp grarpamp at
Tue Apr 6 08:39:52 UTC 2021

Shouldn't this get a kernel option, sysctl, test app...?

AMD advised customers last week to disable a new
performance feature if they plan to use CPUs for sensitive operations,
as this feature is vulnerable to Spectre-like side-channel attacks.
Called Predictive Store Forwarding (PSF), this feature was added to
AMD CPUs part of the company's Zen 3 core architecture.

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