Linux 7.2 will include support for ACPI CPPC v4 (Collaborative Processor Performance Control), contributed by NVIDIA engineer Sumit Gupta. CPPC v4, defined in ACPI 6.6, adds two new optional features: an OSPM Nominal Performance register allowing the OS to signal what it considers nominal performance (with anything above treated as boost and below as throttle), and a Resource Priority mechanism for setting relative processor priority for shared resources like cache and memory bandwidth. The patch is now in the linux-pm.git linux-next branch and is expected to land in the Linux 7.2 merge window. This work is tied to NVIDIA's Vera CPU platform, though other hardware vendors using ACPI CPPC will also benefit.
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