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=unavailable 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 AA85DC10DCE for ; Wed, 18 Mar 2020 06:59:56 +0000 (UTC) Received: from lists.ozlabs.org (unknown [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 2704C20674 for ; Wed, 18 Mar 2020 06:59:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2704C20674 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 lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48j1BK3F82zDqk8 for ; Wed, 18 Mar 2020 17:59:53 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=ravi.bangoria@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 (mx0b-001b2d01.pphosted.com [148.163.158.5]) (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 48j18c22mfzDqSY for ; Wed, 18 Mar 2020 17:58:23 +1100 (AEDT) Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 02I6WfPl005790 for ; Wed, 18 Mar 2020 02:58:20 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0b-001b2d01.pphosted.com with ESMTP id 2yu98sssjk-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 18 Mar 2020 02:58:19 -0400 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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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 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 phishscore=0 clxscore=1015 adultscore=0 mlxlogscore=999 suspectscore=0 impostorscore=0 mlxscore=0 lowpriorityscore=0 malwarescore=0 bulkscore=0 priorityscore=1501 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003180029 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: apopple@linux.ibm.com, mikey@neuling.org, Ravi Bangoria , peterz@infradead.org, oleg@redhat.com, npiggin@gmail.com, linux-kernel@vger.kernel.org, paulus@samba.org, jolsa@kernel.org, fweisbec@gmail.com, naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, mingo@kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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