{"id":773446,"url":"http://patchwork.ozlabs.org/api/1.2/patches/773446/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20170608191655.19469-1-naveen.n.rao@linux.vnet.ibm.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.2/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<20170608191655.19469-1-naveen.n.rao@linux.vnet.ibm.com>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/20170608191655.19469-1-naveen.n.rao@linux.vnet.ibm.com/","date":"2017-06-08T19:16:55","name":"powerpc/kprobes: Don't save/restore DAR/DSISR to/from pt_regs for optprobes","commit_ref":"ec4189c4e8eea0c5e7c9b71cb1502cdcbb32aa17","pull_url":null,"state":"accepted","archived":false,"hash":"37fe7edce035dde74014375dc14ae8999eef5343","submitter":{"id":15185,"url":"http://patchwork.ozlabs.org/api/1.2/people/15185/?format=json","name":"Naveen N. Rao","email":"naveen.n.rao@linux.vnet.ibm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20170608191655.19469-1-naveen.n.rao@linux.vnet.ibm.com/mbox/","series":[],"comments":"http://patchwork.ozlabs.org/api/patches/773446/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/773446/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Received":["from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3wkFZT21brz9s0m\n\tfor ;\n\tFri, 9 Jun 2017 05:18:25 +1000 (AEST)","from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3wkFZT1CMPzDqS0\n\tfor ;\n\tFri, 9 Jun 2017 05:18:25 +1000 (AEST)","from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com\n\t[148.163.156.1])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3wkFYC3J62zDqNp\n\tfor ;\n\tFri, 9 Jun 2017 05:17:19 +1000 (AEST)","from pps.filterd (m0098396.ppops.net [127.0.0.1])\n\tby mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id\n\tv58JE4pu094267\n\tfor ; Thu, 8 Jun 2017 15:17:16 -0400","from e23smtp07.au.ibm.com (e23smtp07.au.ibm.com [202.81.31.140])\n\tby mx0a-001b2d01.pphosted.com with ESMTP id 2ay49hfx65-1\n\t(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)\n\tfor ; Thu, 08 Jun 2017 15:17:16 -0400","from localhost\n\tby e23smtp07.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use\n\tOnly! Violators will be prosecuted\n\tfor from\n\t; Fri, 9 Jun 2017 05:17:14 +1000","from d23relay06.au.ibm.com (202.81.31.225)\n\tby e23smtp07.au.ibm.com (202.81.31.204) with IBM ESMTP SMTP Gateway:\n\tAuthorized Use Only! Violators will be prosecuted; \n\tFri, 9 Jun 2017 05:17:12 +1000","from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97])\n\tby d23relay06.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id\n\tv58JHB3858130464\n\tfor ; Fri, 9 Jun 2017 05:17:11 +1000","from d23av03.au.ibm.com (localhost [127.0.0.1])\n\tby d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id\n\tv58JH3A6020922\n\tfor ; Fri, 9 Jun 2017 05:17:03 +1000","from naverao1-tp.ibm.com ([9.79.215.140])\n\tby d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id\n\tv58JH0mE020779; Fri, 9 Jun 2017 05:17:01 +1000"],"From":"\"Naveen N. Rao\" ","To":"Michael Ellerman ","Subject":"[PATCH] powerpc/kprobes: Don't save/restore DAR/DSISR to/from\n\tpt_regs for optprobes","Date":"Fri, 9 Jun 2017 00:46:55 +0530","X-Mailer":"git-send-email 2.12.2","X-TM-AS-MML":"disable","x-cbid":"17060819-0044-0000-0000-00000269AAA0","X-IBM-AV-DETECTION":"SAVI=unused REMOTE=unused XFE=unused","x-cbparentid":"17060819-0045-0000-0000-000006F8B6B3","Message-Id":"<20170608191655.19469-1-naveen.n.rao@linux.vnet.ibm.com>","X-Proofpoint-Virus-Version":"vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2017-06-08_07:, , signatures=0","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n\tspamscore=0 suspectscore=0\n\tmalwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam\n\tadjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000\n\tdefinitions=main-1706080336","X-BeenThere":"linuxppc-dev@lists.ozlabs.org","X-Mailman-Version":"2.1.23","Precedence":"list","List-Id":"Linux on PowerPC Developers Mail List\n\t","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"linuxppc-dev@lists.ozlabs.org, Masami Hiramatsu ","Errors-To":"linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org","Sender":"\"Linuxppc-dev\"\n\t"},"content":"We don't save/restore these across a trap, or with KPROBES_ON_FTRACE.\n\nSigned-off-by: Naveen N. Rao \n---\n arch/powerpc/kernel/optprobes_head.S | 8 --------\n 1 file changed, 8 deletions(-)","diff":"diff --git a/arch/powerpc/kernel/optprobes_head.S b/arch/powerpc/kernel/optprobes_head.S\nindex 4937bef7652f..52fc864cdec4 100644\n--- a/arch/powerpc/kernel/optprobes_head.S\n+++ b/arch/powerpc/kernel/optprobes_head.S\n@@ -60,10 +60,6 @@ optprobe_template_entry:\n \tstd\tr5,_CCR(r1)\n \tlbz r5,PACASOFTIRQEN(r13)\n \tstd r5,SOFTE(r1)\n-\tmfdar\tr5\n-\tstd\tr5,_DAR(r1)\n-\tmfdsisr\tr5\n-\tstd\tr5,_DSISR(r1)\n \n \t/*\n \t * We may get here from a module, so load the kernel TOC in r2.\n@@ -122,10 +118,6 @@ optprobe_template_call_emulate:\n \tmtxer\tr5\n \tld\tr5,_CCR(r1)\n \tmtcr\tr5\n-\tld\tr5,_DAR(r1)\n-\tmtdar\tr5\n-\tld\tr5,_DSISR(r1)\n-\tmtdsisr\tr5\n \tREST_GPR(0,r1)\n \tREST_10GPRS(2,r1)\n \tREST_10GPRS(12,r1)\n","prefixes":[]}