From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-x243.google.com (mail-qk0-x243.google.com [IPv6:2607:f8b0:400d:c09::243]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3wqNcx5QmXzDqMW for ; Sat, 17 Jun 2017 13:53:21 +1000 (AEST) Received: by mail-qk0-x243.google.com with SMTP id r62so897934qkf.3 for ; Fri, 16 Jun 2017 20:53:21 -0700 (PDT) Sender: Ram Pai From: Ram Pai To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org 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, linuxram@us.ibm.com Subject: [RFC v2 10/12] powerpc: Read AMR only if pkey-violation caused the exception. Date: Fri, 16 Jun 2017 20:52:42 -0700 Message-Id: <1497671564-20030-11-git-send-email-linuxram@us.ibm.com> In-Reply-To: <1497671564-20030-1-git-send-email-linuxram@us.ibm.com> References: <1497671564-20030-1-git-send-email-linuxram@us.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Signed-off-by: Ram Pai --- arch/powerpc/kernel/exceptions-64s.S | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 8db9ef8..a4de1b4 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -493,13 +493,15 @@ EXC_COMMON_BEGIN(data_access_common) ld r12,_MSR(r1) ld r3,PACA_EXGEN+EX_DAR(r13) lwz r4,PACA_EXGEN+EX_DSISR(r13) + std r3,_DAR(r1) + std r4,_DSISR(r1) #ifdef CONFIG_PPC64_MEMORY_PROTECTION_KEYS + andis. r0,r4,DSISR_KEYFAULT@h /* save AMR only if its a key fault */ + beq+ 1f mfspr r5,SPRN_AMR std r5,PACA_AMR(r13) #endif /* CONFIG_PPC64_MEMORY_PROTECTION_KEYS */ - li r5,0x300 - std r3,_DAR(r1) - std r4,_DSISR(r1) +1: li r5,0x300 BEGIN_MMU_FTR_SECTION b do_hash_page /* Try to handle as hpte fault */ MMU_FTR_SECTION_ELSE @@ -565,13 +567,15 @@ EXC_COMMON_BEGIN(instruction_access_common) ld r12,_MSR(r1) ld r3,_NIP(r1) andis. r4,r12,0x5820 + std r3,_DAR(r1) + std r4,_DSISR(r1) #ifdef CONFIG_PPC64_MEMORY_PROTECTION_KEYS + andis. r0,r4,DSISR_KEYFAULT@h /* save AMR only if its a key fault */ + beq+ 1f mfspr r5,SPRN_AMR std r5,PACA_AMR(r13) #endif /* CONFIG_PPC64_MEMORY_PROTECTION_KEYS */ - li r5,0x400 - std r3,_DAR(r1) - std r4,_DSISR(r1) +1: li r5,0x400 BEGIN_MMU_FTR_SECTION b do_hash_page /* Try to handle as hpte fault */ MMU_FTR_SECTION_ELSE -- 1.8.3.1