It Turns Out Linux Is Supposed To Enable STIBP When Enabling AMD Zen 4's Auto IBRS

phoronix

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It Turns Out Linux Is Supposed To Enable STIBP When Enabling AMD Zen 4's Auto IBRS

23 July 2023, 07:22 AM

Phoronix: It Turns Out Linux Is Supposed To Enable STIBP When Enabling AMD Zen 4's Auto IBRS

Automatic IBRS is a new feature with AMD Zen 4 processors akin to Intel's Enhanced IBRS functionality. Linux 6.3 added Auto IBRS support but it turns out when that was being enabled an oversight was made...

It Turns Out Linux Is Supposed To Enable STIBP When Enabling AMD Zen 4's Auto IBRS - Phoronix

https://www.phoronix.com/news/AMD-Automatic-IBRS-STIBP

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Keith Myers

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Join Date: Nov 2018

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23 July 2023, 07:31 PM

Looks like this fix patch DIDN'T make it into today's 6.5r-c3 kernel release as suggested it would.
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