Source: linux Version: 6.5.3-2 Severity: wishlist Tags: patch X-Debbugs-Cc: [email protected], [email protected]
Dear Maintainer, Please enable the Intel's Topology Aware Register and PM Capsule Interface (INTEL_TPMI) and support for the Running Average Power Limit (RAPL) feature via TPMI (INTEL_RAPL_TPMI) on arch amd64/x86_64, on Debian Trixie. TPMI is a flexible, extendable and software-driver-enumerable MMIO interface for Power Management (PM) features. TPMI, planned for future Intel® Xeon® processor generations, is designed using an architectural PCI-e standards-based model so that PM feature support can be provided cleanly as a driver and not as part of the base OS. Intel RAPL is one of the features that benefits from this. Using the TPMI interface has the advantage over the traditional MSR (Model Specific Register) interface of not requiring scheduling a thread on the target CPU to read or write. Also, TPMI provides an architectural interface by supplying hierarchical tables and fields, which will not need any model specific implementation. In addition to RAPL, there are two other features that receive similar benefits and which are selected by default by enabling INTEL_TPMI. They are INTEL_UNCORE_FREQ_CONTROL_TPMI and INTEL_SPEED_SELECT_TPMI. A MR was created with this proposal at: https://salsa.debian.org/kernel-team/linux/-/merge_requests/863 Thanks, Jair Gonzalez
