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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 10 Oct 2018 21:53:12 -0600 Received: from b03ledav004.gho.boulder.ibm.com (b03ledav004.gho.boulder.ibm.com [9.17.130.235]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w9B3rBwl23134458 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 10 Oct 2018 20:53:11 -0700 Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6738978064; Wed, 10 Oct 2018 21:53:11 -0600 (MDT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 09BCD78067; Wed, 10 Oct 2018 21:53:08 -0600 (MDT) Received: from skywalker.ibmuc.com (unknown [9.85.73.187]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 10 Oct 2018 21:53:08 -0600 (MDT) From: "Aneesh Kumar K.V" To: akpm@linux-foundation.org, mpe@ellerman.id.au, benh@kernel.crashing.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "Aneesh Kumar K.V" Subject: [PATCH 0/5] NestMMU pte upgrade workaround for mprotect and autonuma Date: Thu, 11 Oct 2018 09:22:42 +0530 X-Mailer: git-send-email 2.17.1 X-TM-AS-GCONF: 00 x-cbid: 18101103-0016-0000-0000-0000093F5F92 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009857; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000268; SDB=6.01100919; UDB=6.00569641; IPR=6.00880964; MB=3.00023702; MTD=3.00000008; XFM=3.00000015; UTC=2018-10-11 03:53:14 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18101103-0017-0000-0000-000040A9328D Message-Id: <20181011035247.30687-1-aneesh.kumar@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-10-11_01:,, 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=420 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1810110036 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 or autonuma. 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. 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/autonuma 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 | 8 +++++ arch/powerpc/include/asm/book3s/64/pgtable.h | 18 ++++++++++ arch/powerpc/include/asm/hugetlb.h | 2 +- arch/powerpc/mm/hugetlbpage.c | 35 ++++++++++++++++++++ arch/powerpc/mm/pgtable-book3s64.c | 34 +++++++++++++++++++ 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 ++-- 14 files changed, 150 insertions(+), 27 deletions(-)