From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 674F3C06513 for ; Thu, 4 Jul 2019 09:26:58 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EA08B218A0 for ; Thu, 4 Jul 2019 09:26:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EA08B218A0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.vnet.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 45fXg372xfzDqGZ for ; Thu, 4 Jul 2019 19:26:55 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=huntbag@linux.vnet.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 45fXXK6G5TzDqYq for ; Thu, 4 Jul 2019 19:21:05 +1000 (AEST) Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x649H9WS118019 for ; Thu, 4 Jul 2019 05:21:03 -0400 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0b-001b2d01.pphosted.com with ESMTP id 2thee20unf-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 04 Jul 2019 05:21:03 -0400 Received: from localhost by e06smtp07.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 4 Jul 2019 10:21:01 +0100 Received: from b06cxnps3074.portsmouth.uk.ibm.com (9.149.109.194) by e06smtp07.uk.ibm.com (192.168.101.137) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 4 Jul 2019 10:20:58 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x649Kv9h43450590 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 4 Jul 2019 09:20:57 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 229E64C04E; Thu, 4 Jul 2019 09:20:57 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 972714C040; Thu, 4 Jul 2019 09:20:55 +0000 (GMT) Received: from boston16h.aus.stglabs.ibm.com (unknown [9.3.23.78]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 4 Jul 2019 09:20:55 +0000 (GMT) From: Abhishek Goel To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-pm@vger.kernel.org Subject: [RFC v3 2/3] cpuidle : Add callback whenever a state usage is enabled/disabled Date: Thu, 4 Jul 2019 04:18:26 -0500 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190704091827.19555-1-huntbag@linux.vnet.ibm.com> References: <20190704091827.19555-1-huntbag@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19070409-0028-0000-0000-000003805A4A X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19070409-0029-0000-0000-000024409C4E Message-Id: <20190704091827.19555-3-huntbag@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-07-04_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=824 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907040122 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ego@linux.vnet.ibm.com, daniel.lezcano@linaro.org, rjw@rjwysocki.net, npiggin@gmail.com, Abhishek Goel , dja@axtens.net Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" To force wakeup a cpu, we need to compute the timeout in the fast idle path as a state may be enabled or disabled but there did not exist a feedback to driver when a state is enabled or disabled. This patch adds a callback whenever a state_usage records a store for disable attribute. Signed-off-by: Abhishek Goel --- drivers/cpuidle/sysfs.c | 15 ++++++++++++++- include/linux/cpuidle.h | 4 ++++ 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c index eb20adb5d..141671a53 100644 --- a/drivers/cpuidle/sysfs.c +++ b/drivers/cpuidle/sysfs.c @@ -415,8 +415,21 @@ static ssize_t cpuidle_state_store(struct kobject *kobj, struct attribute *attr, struct cpuidle_state_usage *state_usage = kobj_to_state_usage(kobj); struct cpuidle_state_attr *cattr = attr_to_stateattr(attr); - if (cattr->store) + if (cattr->store) { ret = cattr->store(state, state_usage, buf, size); + if (ret == size && + strncmp(cattr->attr.name, "disable", + strlen("disable"))) { + struct kobject *cpuidle_kobj = kobj->parent; + struct cpuidle_device *dev = + to_cpuidle_device(cpuidle_kobj); + struct cpuidle_driver *drv = + cpuidle_get_cpu_driver(dev); + + if (drv->disable_callback) + drv->disable_callback(dev, drv); + } + } return ret; } diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index bb9a0db89..8a0e54bd0 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -119,6 +119,10 @@ struct cpuidle_driver { /* the driver handles the cpus in cpumask */ struct cpumask *cpumask; + + void (*disable_callback)(struct cpuidle_device *dev, + struct cpuidle_driver *drv); + }; #ifdef CONFIG_CPU_IDLE -- 2.17.1