Linux 6.5-rc4 Brings Change For Enabling STIBP On AMD Zen 4 Auto IBRS Systems
![AMD](/assets/categories/amd.webp)
AMD Automatic IBRS is akin to Intel eIBRS with this new feature being found on all AMD Zen 4 processors. Since Linux 6.3 there has been support for using Automatic IBRS by default on capable AMD systems but it didn't end up enabling STIBP for user processes.
The x86/urgent pull request sent to Linus Torvalds this morning now ensures STIBP gets flipped on when using Automatic IBRS. That is the main change as part of this week's x86/urgent material.
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