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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 10CA4C10DCE for ; Wed, 18 Mar 2020 12:52:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E1CDB20771 for ; Wed, 18 Mar 2020 12:52:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726785AbgCRMw4 (ORCPT ); Wed, 18 Mar 2020 08:52:56 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:26012 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726550AbgCRMw4 (ORCPT ); Wed, 18 Mar 2020 08:52:56 -0400 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 02ICXs5D004289 for ; Wed, 18 Mar 2020 08:52:55 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2yu7wcrtmp-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 18 Mar 2020 08:52:55 -0400 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 18 Mar 2020 12:52:53 -0000 Received: from b06cxnps4075.portsmouth.uk.ibm.com (9.149.109.197) by e06smtp03.uk.ibm.com (192.168.101.133) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 18 Mar 2020 12:52:48 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02ICqlFH59768886 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 18 Mar 2020 12:52:47 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1EC8552057; Wed, 18 Mar 2020 12:52:47 +0000 (GMT) Received: from [9.199.38.35] (unknown [9.199.38.35]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 91F215204E; Wed, 18 Mar 2020 12:52:35 +0000 (GMT) Subject: Re: [PATCH 00/15] powerpc/watchpoint: Preparation for more than one watchpoint To: Christophe Leroy Cc: mpe@ellerman.id.au, mikey@neuling.org, apopple@linux.ibm.com, paulus@samba.org, npiggin@gmail.com, naveen.n.rao@linux.vnet.ibm.com, peterz@infradead.org, jolsa@kernel.org, oleg@redhat.com, fweisbec@gmail.com, mingo@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Ravi Bangoria References: <20200309085806.155823-1-ravi.bangoria@linux.ibm.com> From: Ravi Bangoria Date: Wed, 18 Mar 2020 18:22:28 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 20031812-0012-0000-0000-000003932FA3 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20031812-0013-0000-0000-000021D0120A Message-Id: <429c04e9-7267-55a9-a6f9-1fe9b21ae033@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.645 definitions=2020-03-18_05:2020-03-18,2020-03-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 spamscore=0 clxscore=1015 priorityscore=1501 phishscore=0 suspectscore=0 lowpriorityscore=0 mlxlogscore=999 impostorscore=0 adultscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003180061 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/16/20 8:35 PM, Christophe Leroy wrote: > > > Le 09/03/2020 à 09:57, Ravi Bangoria a écrit : >> So far, powerpc Book3S code has been written with an assumption of only >> one watchpoint. But future power architecture is introducing second >> watchpoint register (DAWR). Even though this patchset does not enable >> 2nd DAWR, it make the infrastructure ready so that enabling 2nd DAWR >> should just be a matter of changing count. > > Some book3s (e300 family for instance, I think G2 as well) already have a DABR2 in addition to DABR. > Will this series allow to use it as well ? I wasn't aware of that. I'll take a look at their specs and check if they can piggyback on this series for 2nd DABR. Thanks, Ravi