From patchwork Wed Apr 1 06:13:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ravi Bangoria X-Patchwork-Id: 1265027 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 48sbw30BXNz9sRf for ; Wed, 1 Apr 2020 17:32:19 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48sbw2755BzDqwH for ; Wed, 1 Apr 2020 17:32:18 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org 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 48sbWM4WrNzDr0X for ; Wed, 1 Apr 2020 17:14:23 +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 03163gmp003605 for ; Wed, 1 Apr 2020 02:14:21 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 303uj41trv-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 01 Apr 2020 02:14:21 -0400 Received: from localhost by e06smtp03.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, 1 Apr 2020 07:14:07 +0100 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0316EDFl47448430 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 1 Apr 2020 06:14:13 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3E0E3A404D; Wed, 1 Apr 2020 06:14:13 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A2E02A4051; Wed, 1 Apr 2020 06:14:09 +0000 (GMT) Received: from bangoria.ibmuc.com (unknown [9.199.48.114]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 1 Apr 2020 06:14:09 +0000 (GMT) From: Ravi Bangoria To: mpe@ellerman.id.au, mikey@neuling.org Subject: [PATCH v2 08/16] powerpc/watchpoint: Disable all available watchpoints when !dawr_force_enable Date: Wed, 1 Apr 2020 11:43:01 +0530 X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200401061309.92442-1-ravi.bangoria@linux.ibm.com> References: <20200401061309.92442-1-ravi.bangoria@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 20040106-0012-0000-0000-0000039C1A69 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20040106-0013-0000-0000-000021D928E6 Message-Id: <20200401061309.92442-9-ravi.bangoria@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.676 definitions=2020-03-31_07:2020-03-31, 2020-03-31 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 impostorscore=0 adultscore=0 mlxlogscore=651 lowpriorityscore=0 malwarescore=0 bulkscore=0 priorityscore=1501 phishscore=0 clxscore=1015 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004010049 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, ravi.bangoria@linux.ibm.com, peterz@infradead.org, fweisbec@gmail.com, oleg@redhat.com, npiggin@gmail.com, linux-kernel@vger.kernel.org, paulus@samba.org, jolsa@kernel.org, naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, mingo@kernel.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Instead of disabling only first watchpoint, disable all available watchpoints while clearing dawr_force_enable. Signed-off-by: Ravi Bangoria --- arch/powerpc/kernel/dawr.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/dawr.c b/arch/powerpc/kernel/dawr.c index 311e51ee09f4..5c882f07ac7d 100644 --- a/arch/powerpc/kernel/dawr.c +++ b/arch/powerpc/kernel/dawr.c @@ -50,9 +50,13 @@ int set_dawr(struct arch_hw_breakpoint *brk, int nr) return 0; } -static void set_dawr_cb(void *info) +static void disable_dawrs(void *info) { - set_dawr(info, 0); + struct arch_hw_breakpoint null_brk = {0}; + int i; + + for (i = 0; i < nr_wp_slots(); i++) + set_dawr(&null_brk, i); } static ssize_t dawr_write_file_bool(struct file *file, @@ -74,7 +78,7 @@ static ssize_t dawr_write_file_bool(struct file *file, /* If we are clearing, make sure all CPUs have the DAWR cleared */ if (!dawr_force_enable) - smp_call_function(set_dawr_cb, &null_brk, 0); + smp_call_function(disable_dawrs, NULL, 0); return rc; }