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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 16 Jan 2019 08:50:59 -0000 Received: from b01ledav002.gho.pok.ibm.com (b01ledav002.gho.pok.ibm.com [9.57.199.107]) by b01cxnp22033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x0G8owTP19005586 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 16 Jan 2019 08:50:58 GMT Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0322A12405E; Wed, 16 Jan 2019 08:50:58 +0000 (GMT) Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C5EDB124054; Wed, 16 Jan 2019 08:50:55 +0000 (GMT) Received: from skywalker.in.ibm.com (unknown [9.124.31.92]) by b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 16 Jan 2019 08:50:55 +0000 (GMT) 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, "Aneesh Kumar K.V" Subject: [PATCH V5 0/5] NestMMU pte upgrade workaround for mprotect Date: Wed, 16 Jan 2019 14:20:30 +0530 X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19011608-0064-0000-0000-000003977B7F X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010416; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000274; SDB=6.01147213; UDB=6.00597570; IPR=6.00927509; MB=3.00025150; MTD=3.00000008; XFM=3.00000015; UTC=2019-01-16 08:51:01 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19011608-0065-0000-0000-00003C0E10E2 Message-Id: <20190116085035.29729-1-aneesh.kumar@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-01-16_04:,, 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=350 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901160075 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: X-Virus-Scanned: ClamAV using ClamSMTP 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(-)