Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753305AbdGJDL7 (ORCPT ); Sun, 9 Jul 2017 23:11:59 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:46298 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753268AbdGJDL4 (ORCPT ); Sun, 9 Jul 2017 23:11:56 -0400 From: Anshuman Khandual Subject: Re: [RFC v5 33/38] powerpc: Deliver SEGV signal on pkey violation To: Ram Pai , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org References: <1499289735-14220-1-git-send-email-linuxram@us.ibm.com> <1499289735-14220-34-git-send-email-linuxram@us.ibm.com> Cc: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, dave.hansen@intel.com, hbabu@us.ibm.com, arnd@arndb.de, akpm@linux-foundation.org, corbet@lwn.net, mingo@redhat.com Date: Mon, 10 Jul 2017 08:38:53 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <1499289735-14220-34-git-send-email-linuxram@us.ibm.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable x-cbid: 17071003-0040-0000-0000-00000342E5D1 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17071003-0041-0000-0000-00000CBE3390 Message-Id: <4cbcc16c-7597-7aa1-ddea-b6bef25df11b@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-07-10_01:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1707100055 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1093 Lines: 29 On 07/06/2017 02:52 AM, Ram Pai wrote: > The value of the AMR register at the time of exception > is made available in gp_regs[PT_AMR] of the siginfo. > > The value of the pkey, whose protection got violated, > is made available in si_pkey field of the siginfo structure. > > Signed-off-by: Ram Pai > --- > arch/powerpc/include/uapi/asm/ptrace.h | 3 ++- > arch/powerpc/kernel/signal_32.c | 5 +++++ > arch/powerpc/kernel/signal_64.c | 4 ++++ > arch/powerpc/kernel/traps.c | 14 ++++++++++++++ > 4 files changed, 25 insertions(+), 1 deletions(-) > > diff --git a/arch/powerpc/include/uapi/asm/ptrace.h b/arch/powerpc/include/uapi/asm/ptrace.h > index 8036b38..7ec2428 100644 > --- a/arch/powerpc/include/uapi/asm/ptrace.h > +++ b/arch/powerpc/include/uapi/asm/ptrace.h > @@ -108,8 +108,9 @@ struct pt_regs { > #define PT_DAR 41 > #define PT_DSISR 42 > #define PT_RESULT 43 > -#define PT_DSCR 44 > #define PT_REGS_COUNT 44 > +#define PT_DSCR 44 > +#define PT_AMR 45 Why PT_DSCR was moved down ? This change is redundant here.