AMD Sends Out Linux Kernel Patches To Allow Disabling Predictive Store Forwarding (PSF)

[phoronix]

Phoronix: AMD Sends Out Linux Kernel Patches To Allow Disabling Predictive Store Forwarding (PSF)

AMD last week published a security whitepaper on Zen 3's Predictive Store Forwarding (PSF) functionality introduced with Ryzen 5000 series and EPYC 7003 series processors. In the whitepaper they mentioned Linux patches were published for allowing this feature to be disabled if concerned about the security risk, well, today those patches were made public...

https://www.phoronix.com/scan.php?page=news_item&px=AMD-PSF-Mitigation-Linux

[Alex/AT]

"With a patched kernel, PSF remains on by default but can be disabled"
Geez. Using mitigations=off will slowly become normal even with AMD CPUs. Just because of crazily trying to plug every imaginarily exploitable hole.
And imo, this will hurt global security much more than just leaving few of such unplugged.