Hwmon Updates Submitted For Linux 4.13, Still No Ryzen/Epyc Temp Support
Written by Michael Larabel in AMD on 3 July 2017 at 12:57 PM EDT. 10 Comments
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The hwmon (hardware monitoring) subsystem updates have been submitted for Linux 4.13 and what's sad about the pull request is what isn't present.

While AMD Ryzen is supported by the mainline Linux kernel as well as the forthcoming Epyc CPUs, they are sadly missing a feature important to some: thermal monitoring. While it may seem rather trivial, as of Linux 4.13 Git there still isn't any supported driver for being able to read the Zen-based CPU temperatures under Linux.

The hwmon pull request was sent today and sadly doesn't contain any Zen support changes for either adding the Zen temperature reading support to the k10temp driver (what currently supports from the AMD Family 10h CPUs up through Bulldozer/Kaveri/Carrizo as well as APUs like Kabini and Mullins) or a new driver.

Also for that matter, the fam15h_power driver that is also within the hwmon subsystem and reports power measurements on newer AMD CPUs also hasn't received any Zen support.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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