From 2d281d8196e38dd3a4ee9af26621ddde8329f269 Mon Sep 17 00:00:00 2001 From: Jacob Pan Date: Thu, 17 Oct 2013 10:28:35 -0700 Subject: PowerCap: Introduce Intel RAPL power capping driver The Intel Running Average Power Limit (RAPL) technology provides platform software with the ability to monitor, control, and get notifications on power usage. This feature is present in all Sandy Bridge and later Intel processors. Newer models allow more fine grained controls to be applied. In RAPL, power control is divided into domains, which include package, DRAM controller, CPU core (Power Plane 0), graphics uncore (power plane 1), etc. The purpose of this driver is to expose the RAPL settings to userspace. Overall, RAPL fits in the new powercap class driver in that platform level power capping controls are exposed via this generic interface. This driver is based on an earlier patch from Zhang Rui. However, while the previous work was mainly focused on thermal monitoring the focus here is on the usability from user space perspective. References: https://lkml.org/lkml/2011/5/26/93 Signed-off-by: Srinivas Pandruvada Signed-off-by: Jacob Pan Reviewed-by: Rafael J. Wysocki Signed-off-by: Rafael J. Wysocki --- drivers/powercap/Kconfig | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers/powercap/Kconfig') diff --git a/drivers/powercap/Kconfig b/drivers/powercap/Kconfig index a37055eb5eb..a7c81b53d88 100644 --- a/drivers/powercap/Kconfig +++ b/drivers/powercap/Kconfig @@ -15,5 +15,18 @@ menuconfig POWERCAP if POWERCAP # Client driver configurations go here. +config INTEL_RAPL + tristate "Intel RAPL Support" + depends on X86 + default n + ---help--- + This enables support for the Intel Running Average Power Limit (RAPL) + technology which allows power limits to be enforced and monitored on + modern Intel processors (Sandy Bridge and later). + + In RAPL, the platform level settings are divided into domains for + fine grained control. These domains include processor package, DRAM + controller, CPU core (Power Plance 0), graphics uncore (Power Plane + 1), etc. endif -- cgit v1.2.3-18-g5258