Software Tuning, Performance Optimization & Platform Monitoring
Discussion regarding monitoring and software tuning methodologies, Performance Monitoring Unit (PMU) of Intel microprocessors, and platform updating.

Request for documentation on MSR 0x150 (Overclocking Mailbox)

aleb
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Hello,

I am developing software to manage voltage offsets for Intel CPUs under Linux. I am writing here for official documentation on MSR 0x150, also known as the Overclocking Mailbox.
As far as I know there is no pubicly available documentation on this topic as of yet, and all known information comes from reverse engineering efforts and academic security researchers (e.g. Plundervolt). This MSR is used in first-party tools such as Intel Extreme Tuning Utility (XTU), having official information on the topic would greatly help the implementation of power management features as well as security researchers in finding and reporting security vulnerabilities in Intel hardware.

Thank you for reading my enquiry.
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