1.\" 2.\" This file and its contents are supplied under the terms of the 3.\" Common Development and Distribution License ("CDDL"), version 1.0. 4.\" You may only use this file in accordance with the terms of version 5.\" 1.0 of the CDDL. 6.\" 7.\" A full copy of the text of the CDDL should have accompanied this 8.\" source. A copy of the CDDL is also available via the Internet at 9.\" http://www.illumos.org/license/CDDL. 10.\" 11.\" 12.\" Copyright 2019, Joyent, Inc. 13.\" Copyright 2020 Oxide Computer Company 14.\" 15.Dd September 1, 2020 16.Dt SMNTEMP 4D 17.Os 18.Sh NAME 19.Nm smntemp 20.Nd AMD SMN Temperature Sensor Driver 21.Sh SYNOPSIS 22.Pa /dev/sensors/temperature/cpu/* 23.Sh DESCRIPTION 24The 25.Nm 26driver provides the system access to the temperature sensor found in the 27AMD System Management Network 28.Pq SMN 29on AMD Family 17h 30.Pq Zen, Zen+, and Zen 2 31processors. 32.Pp 33From this, the driver exposes temperature sensors. 34On Family 17h systems, temperature sensors exist for each Zeppelin die, 35of which there may be multiple in a single package. 36This means that each sensor covers more than one core. 37.Pp 38Temperature information is available to the system via the fault 39management architecture 40.Pq FMA . 41The file system location and programming interface to the 42.Nm 43driver are considered 44.Sy Volatile , 45subject to change without notice, and should not be used directly. 46Raw temperature information can be dumped through the FMA developer 47utility fmtopo. 48.Sh SEE ALSO 49.Xr amdnbtemp 4D , 50.Xr amdzen 4D , 51.Xr fmadm 8 52.Rs 53.%A AMD 54.%B Open-Source Register Reference For AMD Family 17h Processors Models 00h-2Fh 55.%D July, 2018 56.Re 57