[00/13] intel_rapl: RAPL abstraction and MMIO RAPL support

Message ID	1561475808-24839-1-git-send-email-rui.zhang@intel.com (mailing list archive)
Headers	show Return-Path: <linux-pm-owner@kernel.org> From: Zhang Rui <rui.zhang@intel.com> To: rjw@rjwysocki.net Cc: linux-pm@vger.kernel.org, srinivas.pandruvada@intel.com, rui.zhang@intel.com Subject: [PATCH 00/13] intel_rapl: RAPL abstraction and MMIO RAPL support Date: Tue, 25 Jun 2019 23:16:35 +0800 Message-Id: <1561475808-24839-1-git-send-email-rui.zhang@intel.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk
Series	intel_rapl: RAPL abstraction and MMIO RAPL support \| expand [00/13] intel_rapl: RAPL abstraction and MMIO RAPL support [01/13] intel_rapl: use reg instead of msr [02/13] intel_rapl: remove hardcoded register index [03/13] intel_rapl: introduce intel_rapl.h [04/13] intel_rapl: introduce struct rapl_private [05/13] intel_rapl: abstract register address [06/13] intel_rapl: abstract register access operations [07/13] intel_rapl: cleanup some functions [08/13] intel_rapl: cleanup hardcoded MSR access [09/13] intel_rapl: abstract RAPL common code [10/13] intel_rapl: support 64 bit register [11/13] intel_rapl: support two power limits for every RAPL domain [12/13] int340X/processor_thermal_device: add support for MMIO RAPL [13/13] intel_rapl: Fix module autoloading issue

Message ID

1561475808-24839-1-git-send-email-rui.zhang@intel.com (mailing list archive)

Headers

From: Zhang Rui <rui.zhang@intel.com>
To: rjw@rjwysocki.net
Cc: linux-pm@vger.kernel.org, srinivas.pandruvada@intel.com,
        rui.zhang@intel.com
Subject: [PATCH 00/13] intel_rapl: RAPL abstraction and MMIO RAPL support
Date: Tue, 25 Jun 2019 23:16:35 +0800
Message-Id: <1561475808-24839-1-git-send-email-rui.zhang@intel.com>
Sender: linux-pm-owner@vger.kernel.org
Precedence: bulk

Series

intel_rapl: RAPL abstraction and MMIO RAPL support | expand

Message

Zhang, Rui June 25, 2019, 3:16 p.m. UTC

Besideis MSR interface, RAPL can also be controlled via the MMIO interface,
by accessing the MCHBar registers exposed by the processor thermal device.

Currently, we only have RAPL MSR interface in Linux kernel, this brings
problems on some platforms that BIOS performs a low power limits via the
MMIO interface by default. This results in poor system performance,
and there is no way for us to change the MMIO MSR setting in Linux.

To fix this, RAPL MMIO interface support is introduced in this patch set.

Patch 1/13 to patch 11/13 abstract the RAPL code, and move all the shared
code into a separate file, intel_rapl_common.c, so that it can be used
by both MSR and MMIO interfaces.
Patch 12/13 introduced RAPL support via MMIO registers, exposed by the
processor thermal devices.
Patch 13/13 fixes a module autoloading issue found later.

The patch series has been tested on Dell XPS 9360, a SKL platform.

Note that this patch series are based on the -tip tree, which contains the
latest RAPL changes for multi-die support.

thanks,
rui