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=-8.2 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 31C0FC10DCE for ; Wed, 18 Mar 2020 06:58:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E8C682076A for ; Wed, 18 Mar 2020 06:58:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727162AbgCRG6V (ORCPT ); Wed, 18 Mar 2020 02:58:21 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:41814 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726553AbgCRG6V (ORCPT ); Wed, 18 Mar 2020 02:58:21 -0400 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 02I6Xd4v004156 for ; Wed, 18 Mar 2020 02:58:20 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 2yu8hv38my-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 18 Mar 2020 02:58:20 -0400 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 18 Mar 2020 06:58:18 -0000 Received: from b06cxnps4074.portsmouth.uk.ibm.com (9.149.109.196) by e06smtp02.uk.ibm.com (192.168.101.132) 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 06:58:13 -0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02I6wCwY45678706 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 18 Mar 2020 06:58:12 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 53B114204B; Wed, 18 Mar 2020 06:58:12 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 805CA42041; Wed, 18 Mar 2020 06:57:30 +0000 (GMT) Received: from [9.199.53.244] (unknown [9.199.53.244]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 18 Mar 2020 06:57:27 +0000 (GMT) Subject: Re: [PATCH 07/15] powerpc/watchpoint: Get watchpoint count dynamically while disabling them 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> <20200309085806.155823-8-ravi.bangoria@linux.ibm.com> From: Ravi Bangoria Date: Wed, 18 Mar 2020 12:27:24 +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: 20031806-0008-0000-0000-0000035F2A47 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20031806-0009-0000-0000-00004A8083A4 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.645 definitions=2020-03-18_02:2020-03-17,2020-03-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 spamscore=0 suspectscore=0 mlxlogscore=999 priorityscore=1501 impostorscore=0 phishscore=0 clxscore=1015 adultscore=0 malwarescore=0 bulkscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003180032 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/17/20 4:02 PM, Christophe Leroy wrote: > > > Le 09/03/2020 à 09:57, Ravi Bangoria a écrit : >> Instead of disabling only one watchpooint, get num of available >> watchpoints dynamically and disable all of them. >> >> Signed-off-by: Ravi Bangoria >> --- >>   arch/powerpc/include/asm/hw_breakpoint.h | 15 +++++++-------- >>   1 file changed, 7 insertions(+), 8 deletions(-) >> >> diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h >> index 980ac7d9f267..ec61e2b7195c 100644 >> --- a/arch/powerpc/include/asm/hw_breakpoint.h >> +++ b/arch/powerpc/include/asm/hw_breakpoint.h >> @@ -75,14 +75,13 @@ extern void ptrace_triggered(struct perf_event *bp, >>               struct perf_sample_data *data, struct pt_regs *regs); >>   static inline void hw_breakpoint_disable(void) >>   { >> -    struct arch_hw_breakpoint brk; >> - >> -    brk.address = 0; >> -    brk.type = 0; >> -    brk.len = 0; >> -    brk.hw_len = 0; >> -    if (ppc_breakpoint_available()) >> -        __set_breakpoint(&brk, 0); >> +    int i; >> +    struct arch_hw_breakpoint null_brk = {0}; >> + >> +    if (ppc_breakpoint_available()) { > > I think this test should go into nr_wp_slots() which should return zero when no breakpoint is available. Seems possible. Will change it in next version. Thanks, Ravi