From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755406AbaBFFxu (ORCPT ); Thu, 6 Feb 2014 00:53:50 -0500 Received: from e34.co.us.ibm.com ([32.97.110.152]:59613 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755336AbaBFFxq (ORCPT ); Thu, 6 Feb 2014 00:53:46 -0500 Subject: [PATCH V3 0/3] time/cpuidle: Support in tick broadcast framework in absence of external clock device To: rafael.j.wysocki@intel.com, linux-pm@vger.kernel.org, peterz@infradead.org, fweisbec@gmail.com, daniel.lezcano@linaro.org, linux-kernel@vger.kernel.org, paulus@samba.org, benh@kernel.crashing.org, tglx@linutronix.de, linuxppc-dev@lists.ozlabs.org, mingo@kernel.org From: Preeti U Murthy Cc: deepthi@linux.vnet.ibm.com, paulmck@linux.vnet.ibm.com, svaidy@linux.vnet.ibm.com, srivatsa.bhat@linux.vnet.ibm.com Date: Thu, 06 Feb 2014 11:19:35 +0530 Message-ID: <20140206054158.4595.17827.stgit@preeti> User-Agent: StGit/0.16-38-g167d MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14020605-1542-0000-0000-000005D13FD8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On some architectures, the local timers of CPUs stop in deep idle states. They will need to depend on an external clock device to wake them up. However certain implementations of archs do not have an external clock device. This patchset provides support in the tick broadcast framework for such architectures so as to enable the CPUs to get into deep idle. Presently we are in need of this support on certain implementations of PowerPC. This patchset has thus been tested on the same. V1: https://lkml.org/lkml/2013/12/12/687. V2: https://lkml.org/lkml/2014/1/24/28 Changes in V3: 1. Modified comments and code around programming of the broadcast hrtimer. --- Preeti U Murthy (2): time: Change the return type of clockevents_notify() to integer time/cpuidle:Handle failed call to BROADCAST_ENTER on archs with CPUIDLE_FLAG_TIMER_STOP set Thomas Gleixner (1): tick/cpuidle: Initialize hrtimer mode of broadcast drivers/cpuidle/cpuidle.c | 38 +++++++----- include/linux/clockchips.h | 15 ++++- kernel/time/Makefile | 2 - kernel/time/clockevents.c | 8 ++- kernel/time/tick-broadcast-hrtimer.c | 105 ++++++++++++++++++++++++++++++++++ kernel/time/tick-broadcast.c | 51 ++++++++++++++++- kernel/time/tick-internal.h | 6 +- 7 files changed, 197 insertions(+), 28 deletions(-) create mode 100644 kernel/time/tick-broadcast-hrtimer.c --