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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 879E2C433E0 for ; Wed, 24 Jun 2020 10:22:18 +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 3640320706 for ; Wed, 24 Jun 2020 10:22:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3640320706 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 49sK2b6ztzzDqjl for ; Wed, 24 Jun 2020 20:22:15 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=kjain@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (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 49sJy05jFTzDqfJ for ; Wed, 24 Jun 2020 20:18:16 +1000 (AEST) Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 05OA39uh014068; Wed, 24 Jun 2020 06:18:12 -0400 Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 31uwysknb1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 24 Jun 2020 06:18:12 -0400 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 05OAAcxt002313; Wed, 24 Jun 2020 10:18:10 GMT Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by ppma03ams.nl.ibm.com with ESMTP id 31uus50ggh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 24 Jun 2020 10:18:10 +0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 05OAI75446137514 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 24 Jun 2020 10:18:07 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 52EC1AE05D; Wed, 24 Jun 2020 10:18:07 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 278CAAE045; Wed, 24 Jun 2020 10:18:05 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.85.112.18]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 24 Jun 2020 10:18:04 +0000 (GMT) From: Kajol Jain To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au Subject: [PATCH v2 0/2] Add cpu hotplug support for powerpc/perf/hv-24x7 Date: Wed, 24 Jun 2020 15:47:52 +0530 Message-Id: <20200624101754.169612-1-kjain@linux.ibm.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.687 definitions=2020-06-24_05:2020-06-24, 2020-06-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 lowpriorityscore=0 malwarescore=0 bulkscore=0 priorityscore=1501 impostorscore=0 phishscore=0 cotscore=-2147483648 mlxlogscore=999 spamscore=0 adultscore=0 clxscore=1015 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006240073 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: nathanl@linux.ibm.com, ego@linux.vnet.ibm.com, maddy@linux.vnet.ibm.com, kjain@linux.ibm.com, suka@us.ibm.com, anju@linux.vnet.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This patchset add cpu hotplug support for hv_24x7 driver by adding online/offline cpu hotplug function. It also add sysfs file "cpumask" to expose current online cpu that can be used for hv_24x7 event count. Changelog: v1 -> v2 - Changed function to pick active cpu incase of offline from "cpumask_any_but" to "cpumask_last", as cpumask_any_but function pick very next online cpu and incase where we are sequentially off-lining multiple cpus, "pmu_migrate_context" can add extra latency. - Suggested by: Gautham R Shenoy. - Change documentation for cpumask and rather then hardcode the initialization for cpumask_attr_group, add loop to get very first NULL as suggested by Gautham R Shenoy. Kajol Jain (2): powerpc/perf/hv-24x7: Add cpu hotplug support powerpc/hv-24x7: Add sysfs files inside hv-24x7 device to show cpumask .../sysfs-bus-event_source-devices-hv_24x7 | 7 ++ arch/powerpc/perf/hv-24x7.c | 79 ++++++++++++++++++- include/linux/cpuhotplug.h | 1 + 3 files changed, 86 insertions(+), 1 deletion(-) -- 2.18.2