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=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, 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 91BC6C48BE7 for ; Mon, 8 Jul 2019 03:41:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6EC1A20665 for ; Mon, 8 Jul 2019 03:41:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728901AbfGHDlF (ORCPT ); Sun, 7 Jul 2019 23:41:05 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:11064 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727286AbfGHDlF (ORCPT ); Sun, 7 Jul 2019 23:41:05 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x683aW4f017748 for ; Sun, 7 Jul 2019 23:41:03 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0a-001b2d01.pphosted.com with ESMTP id 2tkvj1tcyc-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sun, 07 Jul 2019 23:41:03 -0400 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 8 Jul 2019 04:41:01 +0100 Received: from b06cxnps4074.portsmouth.uk.ibm.com (9.149.109.196) by e06smtp04.uk.ibm.com (192.168.101.134) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 8 Jul 2019 04:40:57 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x683eu5u51445900 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 8 Jul 2019 03:40:56 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A6FC94C046; Mon, 8 Jul 2019 03:40:56 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 70A794C050; Mon, 8 Jul 2019 03:40:55 +0000 (GMT) Received: from [9.124.31.136] (unknown [9.124.31.136]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 8 Jul 2019 03:40:55 +0000 (GMT) Subject: Re: [PATCH] powerpc/hw_breakpoint: move instruction stepping out of hw_breakpoint_handler() To: Christophe Leroy Cc: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Ravi Bangoria References: <57148696-b9a5-d3c1-1e29-82673c558927@linux.ibm.com> From: Ravi Bangoria Date: Mon, 8 Jul 2019 09:10:54 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 19070803-0016-0000-0000-000002902123 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19070803-0017-0000-0000-000032EDCB64 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-07-08_01:,, 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=794 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907080044 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/6/19 1:56 PM, Christophe Leroy wrote: > > > Le 03/07/2019 à 08:20, Ravi Bangoria a écrit : >> >> >> On 6/28/19 9:25 PM, Christophe Leroy wrote: >>> On 8xx, breakpoints stop after executing the instruction, so >>> stepping/emulation is not needed. Move it into a sub-function and >>> remove the #ifdefs. >>> >>> Signed-off-by: Christophe Leroy >>> --- >> >> Reviewed-by: Ravi Bangoria >> >> Just one neat below... > > Thanks for the review. > >> >> [...] >> >>> -#ifndef CONFIG_PPC_8xx >>> -    /* Do not emulate user-space instructions, instead single-step them */ >>> -    if (user_mode(regs)) { >>> -        current->thread.last_hit_ubp = bp; >>> -        regs->msr |= MSR_SE; >>> +    if (!IS_ENABLED(CONFIG_PPC_8xx) && !stepping_handler(regs, bp, info->address)) >> >> May be split this line. It's 86 chars long and checkpatch.pl is warning >> about this: > > Didn't you use arch/powerpc/tools/checkpatch.sh ? > > powerpc accepts 90 chars per line. Hmm.. wasn't aware of it. Thanks!