Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752511AbbGMOLS (ORCPT ); Mon, 13 Jul 2015 10:11:18 -0400 Received: from e23smtp09.au.ibm.com ([202.81.31.142]:50150 "EHLO e23smtp09.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750856AbbGMOLP (ORCPT ); Mon, 13 Jul 2015 10:11:15 -0400 X-Helo: d23dlp01.au.ibm.com X-MailFrom: shilpa.bhat@linux.vnet.ibm.com X-RcptTo: linux-pm@vger.kernel.org From: Shilpasri G Bhat To: rjw@rjwysocki.net Cc: viresh.kumar@linaro.org, linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Shilpasri G Bhat Subject: [PATCH v4 0/6] powernv: cpufreq: Report frequency throttle by OCC Date: Mon, 13 Jul 2015 19:39:56 +0530 Message-Id: <1436796602-10228-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.3 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15071314-0033-0000-0000-000001C6709B Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1820 Lines: 43 This patchset intends to add frequency throttle reporting mechanism to powernv-cpufreq driver when OCC throttles the frequency. OCC is an On-Chip-Controller which takes care of the power and thermal safety of the chip. The CPU frequency can be throttled during an OCC reset or when OCC tries to limit the max allowed frequency. The patchset will report such conditions so as to keep the user informed about reason for the drop in performance of workloads when frequency is throttled. Changes from v3: - Rebased on top of 4.2-rc1 - Minor changes in patch 2,3,4,6 this does not change the functionality of the code - 594fcb9ec9e powerpc/powernv: Expose OPAL APIs required by PRD interface , this patch fixes the build error due to which this series was initially dropped ERROR: ".opal_message_notifier_register" drivers/cpufreq/powernv-cpufreq.ko] undefined! Changes from v2: - Split into multiple patches - Semantic fixes Shilpasri G Bhat (6): cpufreq: powernv: Handle throttling due to Pmax capping at chip level powerpc/powernv: Add definition of OPAL_MSG_OCC message type cpufreq: powernv: Register for OCC related opal_message notification cpufreq: powernv: Call throttle_check() on receiving OCC_THROTTLE cpufreq: powernv: Report Psafe only if PMSR.psafe_mode_active bit is set cpufreq: powernv: Restore cpu frequency to policy->cur on unthrottling arch/powerpc/include/asm/opal-api.h | 12 +++ drivers/cpufreq/powernv-cpufreq.c | 195 +++++++++++++++++++++++++++++++++--- 2 files changed, 192 insertions(+), 15 deletions(-) -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/