---
name: "km"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/km"
---

# km(4)

AMD K10 temperature sensor

## NAME

**km** – AMD K10 temperature sensor

## SYNOPSIS

**km\* at pci?**

## DESCRIPTION

The **km** driver provides support for the temperature sensors available in the AMD Family 10h, 11h, 14h, 15h, and 16h processors.

Each chip reports one temperature sensor. Multiprocessor systems have one instance of **km** per chip. The highest resolution supported by the driver is 0.125 degC.

Sensor values are made available through the [sysctl(8)](/sysctl/8.md) interface.

## SEE ALSO

[intro(4)](/intro/4.md), [pci(4)](/pci/4.md), [sensorsd(8)](/sensorsd/8.md), [sysctl(8)](/sysctl/8.md) *BIOS and Kernel Developer's Guide for AMD Family 10h Processors*, Publication # 31116, pp. 236–237 and pp. 243–244, March 26, 2008. *BIOS and Kernel Developer's Guide for AMD Family 11h Processors*, Publication # 41256, pp. 156–157 and pp. 159–160, July 07, 2008. *BIOS and Kernel Developer's Guide for AMD Family 14h Models 00h-04h Processors*, Publication # 43170, pp. 277–278 and pp. 280–282, May 02, 2011.

## HISTORY

The **km** driver first appeared in OpenBSD 4.4.

## AUTHORS

The **km** driver was written by Constantine A. Murenin ⟨*cnst@openbsd.org*⟩, University of Waterloo.