'US chipmaker 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.
From a report: Called
Predictive Store Forwarding (PSF), this feature was added to AMD CPUs
part of the company's Zen 3 core architecture, a processor series
dedicated to gaming and high-performance computing, which launched in
November 2020. The feature implements a technique called speculative
execution, which works by running multiple alternative CPU operations
in advance to make results available faster, and then discarding
"predicted" data once deemed unneeded.'
-- source: https://it.slashdot.org/story/21/04/02/1721241
Dept. of Computer Science
University of Waikato, NZ
+64 (7) 577-5304