Borislav Petkov uses AI to clean up AMD Zen detection in Linux kernel
An RFC posted to the Linux kernel mailing list seeks to tidy the AMD Zen micro‑architecture detection code, which governs generation‑specific paths such as Zen 3 through Zen 5. AMD Linux engineer Borislav Petkov said he asked an AI for suggestions, received a detailed blurb, and implemented the core idea in a patch that adds range‑check macros for Zen generations.
Key points
- RFC on the Linux kernel mailing list proposes cleaning up AMD Zen micro‑architecture detection.
- AMD engineer Borislav Petkov used AI to generate range‑check code for Zen 3‑5 CPUs.
- Patch clarifies generation handling and could be extended to pre‑Zen processors.
The initial changes make it clearer which Zen generations a given code path applies to and simplify future extensions, including possible support for pre‑Zen CPUs. Petkov plans to test the patch on real hardware after a successful VM boot, and notes that a broader feature flag (X86\FEATURE\ZEN) will remain for marking all Zen CPUs in a later update.
AI helping to improve Linux's AMD Zen CPU microarchitecture detection
phoronix.com · 22 October 2026Loading the full article…
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