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=-8.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham 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 46F9EC83003 for ; Wed, 29 Apr 2020 09:10:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2D0E82076B for ; Wed, 29 Apr 2020 09:10:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726560AbgD2JKv (ORCPT ); Wed, 29 Apr 2020 05:10:51 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:9750 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726355AbgD2JKv (ORCPT ); Wed, 29 Apr 2020 05:10:51 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 03T95Jaq115608; Wed, 29 Apr 2020 05:10:24 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 30pjy7b303-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Apr 2020 05:10:24 -0400 Received: from m0098414.ppops.net (m0098414.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 03T95JQD115557; Wed, 29 Apr 2020 05:10:24 -0400 Received: from ppma02fra.de.ibm.com (47.49.7a9f.ip4.static.sl-reverse.com [159.122.73.71]) by mx0b-001b2d01.pphosted.com with ESMTP id 30pjy7b2y3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Apr 2020 05:10:23 -0400 Received: from pps.filterd (ppma02fra.de.ibm.com [127.0.0.1]) by ppma02fra.de.ibm.com (8.16.0.27/8.16.0.27) with SMTP id 03T9ACnL014806; Wed, 29 Apr 2020 09:10:22 GMT Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by ppma02fra.de.ibm.com with ESMTP id 30mcu7wkd9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Apr 2020 09:10:21 +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 03T9AJ5p50135132 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 29 Apr 2020 09:10:19 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 109C5AE051; Wed, 29 Apr 2020 09:10:19 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AC484AE045; Wed, 29 Apr 2020 09:10:13 +0000 (GMT) Received: from localhost.localdomain (unknown [9.85.81.16]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 29 Apr 2020 09:10:13 +0000 (GMT) Subject: Re: [PATCH v7 5/5] powerpc/hv-24x7: Update post_mobility_fixup() to handle migration To: Kajol Jain , acme@kernel.org, linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au, sukadev@linux.vnet.ibm.com Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, anju@linux.vnet.ibm.com, maddy@linux.vnet.ibm.com, ravi.bangoria@linux.ibm.com, peterz@infradead.org, yao.jin@linux.intel.com, ak@linux.intel.com, jolsa@kernel.org, kan.liang@linux.intel.com, jmario@redhat.com, alexander.shishkin@linux.intel.com, mingo@kernel.org, paulus@ozlabs.org, namhyung@kernel.org, mpetlan@redhat.com, gregkh@linuxfoundation.org, benh@kernel.crashing.org, mamatha4@linux.vnet.ibm.com, mark.rutland@arm.com, tglx@linutronix.de References: <20200327063642.26175-1-kjain@linux.ibm.com> <20200327063642.26175-6-kjain@linux.ibm.com> From: Madhavan Srinivasan Message-ID: <55ef7993-fcb3-6bd7-f787-78423f0b302b@linux.ibm.com> Date: Wed, 29 Apr 2020 14:40:12 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200327063642.26175-6-kjain@linux.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-29_03:2020-04-28,2020-04-29 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxscore=0 adultscore=0 mlxlogscore=999 clxscore=1015 priorityscore=1501 spamscore=0 malwarescore=0 impostorscore=0 suspectscore=0 bulkscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004290071 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/27/20 12:06 PM, Kajol Jain wrote: > Function 'read_sys_info_pseries()' is added to get system parameter > values like number of sockets and chips per socket. > and it gets these details via rtas_call with token > "PROCESSOR_MODULE_INFO". > > Incase lpar migrate from one system to another, system > parameter details like chips per sockets or number of sockets might > change. So, it needs to be re-initialized otherwise, these values > corresponds to previous system values. > This patch adds a call to 'read_sys_info_pseries()' from > 'post-mobility_fixup()' to re-init the physsockets and physchips values. Changes looks fine to me. Reviewed-by: Madhavan Srinivasan > Signed-off-by: Kajol Jain > --- > arch/powerpc/platforms/pseries/mobility.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c > index b571285f6c14..226accd6218b 100644 > --- a/arch/powerpc/platforms/pseries/mobility.c > +++ b/arch/powerpc/platforms/pseries/mobility.c > @@ -371,6 +371,18 @@ void post_mobility_fixup(void) > /* Possibly switch to a new RFI flush type */ > pseries_setup_rfi_flush(); > > + /* > + * Incase lpar migrate from one system to another, system > + * parameter details like chips per sockets and number of sockets > + * might change. So, it needs to be re-initialized otherwise these > + * values corresponds to previous system. > + * Here, adding a call to read_sys_info_pseries() declared in > + * platforms/pseries/pseries.h to re-init the physsockets and > + * physchips value. > + */ > + if (IS_ENABLED(CONFIG_HV_PERF_CTRS) && IS_ENABLED(CONFIG_PPC_RTAS)) > + read_sys_info_pseries(); > + > return; > } >