From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) by kanga.kvack.org (Postfix) with ESMTP id 9EE976B4D6E for ; Wed, 28 Nov 2018 09:34:59 -0500 (EST) Received: by mail-ed1-f69.google.com with SMTP id x15so12623779edd.2 for ; Wed, 28 Nov 2018 06:34:59 -0800 (PST) Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com. [148.163.158.5]) by mx.google.com with ESMTPS id z49si3929236edz.233.2018.11.28.06.34.57 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 28 Nov 2018 06:34:57 -0800 (PST) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wASEYFOi082781 for ; Wed, 28 Nov 2018 09:34:56 -0500 Received: from e36.co.us.ibm.com (e36.co.us.ibm.com [32.97.110.154]) by mx0b-001b2d01.pphosted.com with ESMTP id 2p1vrn8eju-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 28 Nov 2018 09:34:55 -0500 Received: from localhost by e36.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 28 Nov 2018 14:34:55 -0000 From: "Aneesh Kumar K.V" Subject: [PATCH V2 0/5] NestMMU pte upgrade workaround for mprotect Date: Wed, 28 Nov 2018 20:04:33 +0530 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-Id: <20181128143438.29458-1-aneesh.kumar@linux.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org, mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "Aneesh Kumar K.V" We can upgrade pte access (R -> RW transition) via mprotect. We need to make sure we follow the recommended pte update sequence as outlined in commit: bd5050e38aec ("powerpc/mm/radix: Change pte relax sequence to handle nest MMU hang") for such updates. This patch series do that. Changes from V1: * Restrict ths only for R->RW upgrade. We don't need to do this for Autonuma * Restrict this only for radix translation mode. Aneesh Kumar K.V (5): mm: Update ptep_modify_prot_start/commit to take vm_area_struct as arg mm: update ptep_modify_prot_commit to take old pte value as arg arch/powerpc/mm: Nest MMU workaround for mprotect RW upgrade. mm/hugetlb: Add prot_modify_start/commit sequence for hugetlb update arch/powerpc/mm/hugetlb: NestMMU workaround for hugetlb mprotect RW upgrade arch/powerpc/include/asm/book3s/64/hugetlb.h | 12 ++++++++ arch/powerpc/include/asm/book3s/64/pgtable.h | 18 ++++++++++++ arch/powerpc/include/asm/book3s/64/radix.h | 4 +++ arch/powerpc/mm/hugetlbpage-radix.c | 17 ++++++++++++ arch/powerpc/mm/hugetlbpage.c | 29 ++++++++++++++++++++ arch/powerpc/mm/pgtable-book3s64.c | 27 ++++++++++++++++++ arch/powerpc/mm/pgtable-radix.c | 18 ++++++++++++ arch/s390/include/asm/pgtable.h | 5 ++-- arch/s390/mm/pgtable.c | 8 ++++-- arch/x86/include/asm/paravirt.h | 9 ++++-- fs/proc/task_mmu.c | 8 ++++-- include/asm-generic/pgtable.h | 10 +++---- include/linux/hugetlb.h | 18 ++++++++++++ mm/hugetlb.c | 8 ++++-- mm/memory.c | 8 +++--- mm/mprotect.c | 6 ++-- 16 files changed, 179 insertions(+), 26 deletions(-) -- 2.19.1