From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shilpasri G Bhat Subject: [PATCH v3 0/6] powernv: cpufreq: Report frequency throttle by OCC Date: Mon, 4 May 2015 14:24:06 +0530 Message-ID: <1430729652-14813-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> Return-path: Received: from e23smtp02.au.ibm.com ([202.81.31.144]:52085 "EHLO e23smtp02.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751570AbbEDJAX (ORCPT ); Mon, 4 May 2015 05:00:23 -0400 Received: from /spool/local by e23smtp02.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 4 May 2015 19:00:21 +1000 Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org Cc: rjw@rjwysocki.net, viresh.kumar@linaro.org, preeti@linux.vnet.ibm.com, linux-pm@vger.kernel.org, Shilpasri G Bhat 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 v2: - Split into multiple patches - Semantic fixes Shilpasri G Bhat (6): cpufreq: poowernv: 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 | 8 ++ drivers/cpufreq/powernv-cpufreq.c | 199 +++++++++++++++++++++++++++++++++--- 2 files changed, 192 insertions(+), 15 deletions(-) -- 1.9.3