Intel CPU uncore frequency scaling control
Exposes controls for the "uncore" portion of modern Intel CPUs — the shared L3 cache, ring/mesh interconnect, and memory controllers outside the cores — so administrators can tune their clocks for performance or power. Covers Intel server and workstation chips from Broadwell and Skylake through Sapphire Rapids, Emerald Rapids, and current Xeon 6, plus some recent client parts.
recommendation
It should stay in the kernel because the hardware it controls is current Intel server silicon still being sold and deployed in 2025, including Xeon 6 parts that landed on AWS that August. The code is actively maintained, with new CPU IDs and TPMI support being added through 2026 rather than any removal effort, and there is no replacement driver waiting in the wings.
repository signals
sources
- git.kernel.org
The directory is actively maintained through 2025-2026 with feature additions and bug fixes, not dormant or under removal.
- git.kernel.org
The in-tree match table covers multiple Intel server and client CPU families, including Sapphire Rapids and Emerald Rapids, so this is not tied to a single obsolete platform.
- intel.com
Intel Xeon 6 processors were actively marketed and sold in 2025, showing that supported server/workstation hardware remains current.
- newsroom.intel.com
Intel reported Xeon 6 availability on AWS in August 2025, indicating ongoing real-world deployment on new infrastructure.
codex reasoning notes (technical)
Local shell inspection (`sed`) showed the driver's CPU ID table spans Broadwell/Skylake/Ice Lake through Sapphire/Emerald Rapids and newer client parts; attached canonical kernel.org tree URL by canonical recall for citation. Local `git -c safe.directory=... log` showed substantive activity through 2026-03-25 and no removal/deprecation series; attached canonical kernel.org log URL by canonical recall for citation. Web search (`search_query`) returned current Intel Xeon 6 product and deployment pages, supporting that relevant hardware was still sold and newly deployed in 2025. No natural upstream replacement driver is evident; TPMI support here extends the same driver rather than replacing it.