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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 29 Jan 2019 10:43:50 -0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x0TAhnFc56950932 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 29 Jan 2019 10:43:49 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5373F11C04A; Tue, 29 Jan 2019 10:43:49 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3D1C511C05B; Tue, 29 Jan 2019 10:43:47 +0000 (GMT) Received: from skywalker.linux.ibm.com (unknown [9.85.71.101]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 29 Jan 2019 10:43:47 +0000 (GMT) X-Mailer: emacs 26.1 (via feedmail 11-beta-1 I) From: "Aneesh Kumar K.V" To: npiggin@gmail.com, benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, akpm@linux-foundation.org, x86@kernel.org Cc: linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org Subject: Re: [PATCH V5 0/5] NestMMU pte upgrade workaround for mprotect In-Reply-To: <20190116085035.29729-1-aneesh.kumar@linux.ibm.com> References: <20190116085035.29729-1-aneesh.kumar@linux.ibm.com> Date: Tue, 29 Jan 2019 16:13:45 +0530 MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-GCONF: 00 x-cbid: 19012910-0020-0000-0000-0000030D407E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19012910-0021-0000-0000-0000215E4385 Message-Id: <87va27agm6.fsf@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-01-29_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=519 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901290082 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Andrew, How do you want to merge this? Michael Ellerman suggests this should go via -mm tree. -aneesh "Aneesh Kumar K.V" writes: > 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 V4: > * Drop EXPORT_SYMBOL > > Changes from V3: > * Build fix for x86 > > Changes from V2: > * Update commit message for patch 4 > * use radix tlb flush routines directly. > > 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-hash64.c | 25 ++++++++++++++++++++ > arch/powerpc/mm/hugetlbpage-radix.c | 17 +++++++++++++ > arch/powerpc/mm/pgtable-book3s64.c | 25 ++++++++++++++++++++ > 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 | 13 +++++----- > arch/x86/include/asm/paravirt_types.h | 5 ++-- > arch/x86/xen/mmu.h | 4 ++-- > arch/x86/xen/mmu_pv.c | 8 +++---- > fs/proc/task_mmu.c | 8 ++++--- > include/asm-generic/pgtable.h | 18 +++++++------- > include/linux/hugetlb.h | 20 ++++++++++++++++ > mm/hugetlb.c | 8 ++++--- > mm/memory.c | 8 +++---- > mm/mprotect.c | 6 ++--- > 19 files changed, 189 insertions(+), 41 deletions(-) > > -- > 2.20.1