From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f198.google.com (mail-qt0-f198.google.com [209.85.216.198]) by kanga.kvack.org (Postfix) with ESMTP id 5EB9B6B025F for ; Fri, 15 Sep 2017 21:21:31 -0400 (EDT) Received: by mail-qt0-f198.google.com with SMTP id f24so4352134qte.7 for ; Fri, 15 Sep 2017 18:21:31 -0700 (PDT) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id d54sor1109371qtf.35.2017.09.15.18.21.29 for (Google Transport Security); Fri, 15 Sep 2017 18:21:30 -0700 (PDT) From: Ram Pai Subject: [PATCH 0/6] mm, x86, powerpc: Memory Protection Keys enhancement Date: Fri, 15 Sep 2017 18:21:04 -0700 Message-Id: <1505524870-4783-1-git-send-email-linuxram@us.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, linux-doc@vger.kernel.org Cc: arnd@arndb.de, akpm@linux-foundation.org, corbet@lwn.net, mingo@redhat.com, benh@kernel.crashing.org, paulus@samba.org, khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, hbabu@us.ibm.com, mhocko@kernel.org, bauerman@linux.vnet.ibm.com, ebiederm@xmission.com, linuxram@us.ibm.com The patch-series enhances memory protection keys feature. The patch(1) introduces an additional vma bit to support 32 pkeys. PowerPC supports 32 pkeys. The patch(2,3) introduces a new interface arch_pkeys_enabled(), this interface can be used by arch-neutral code to display protection key value in smap. The patch(4) introduces a syfs interface, to display the static attributes of the protection key. Eg: max number of keys. The last two patches, (5,6) update documentation. A separate patch series that enhances selftest will follow. The entire patch series that enables pkeys on powerpc is at https://github.com/rampai/memorykeys.git memkey.v9-rc1 Testing: ------- This patches are tested on powerpc platform using a enhaced set of selftests. Could not test on x86 since I do not have access to one with pkey support. History: ------- version v3: (1) sysfs interface - thanks Thiago. (2) Documentation update. version v2: (1) Documentation is updated to better capture the semantics. (2) introduced arch_pkeys_enabled() to find if an arch enables pkeys. Correspond- ing change in logic that displays key value in smaps. (3) code rearranged in many places based on comments from Dave Hansen, Balbir, Anshuman. version v1: Initial version Ram Pai (5): mm: introduce an additional vma bit for powerpc pkey mm, x86 : introduce arch_pkeys_enabled() mm: display pkey in smaps if arch_pkeys_enabled() is true Documentation/x86: Move protecton key documentation to arch neutral directory Documentation/vm: PowerPC specific updates to memory protection keys Thiago Jung Bauermann (1): mm/mprotect, powerpc/mm/pkeys, x86/mm/pkeys: Add sysfs interface Documentation/vm/protection-keys.txt | 160 +++++++++++++++++++++++++++++++++ Documentation/x86/protection-keys.txt | 85 ----------------- arch/powerpc/include/asm/pkeys.h | 2 + arch/powerpc/mm/pkeys.c | 20 ++++ arch/x86/include/asm/mmu_context.h | 4 +- arch/x86/include/asm/pkeys.h | 2 + arch/x86/kernel/fpu/xstate.c | 5 + arch/x86/kernel/setup.c | 8 -- arch/x86/mm/pkeys.c | 8 ++ fs/proc/task_mmu.c | 17 ++-- include/linux/mm.h | 16 ++-- include/linux/pkeys.h | 9 ++ mm/mprotect.c | 88 ++++++++++++++++++ 13 files changed, 317 insertions(+), 107 deletions(-) create mode 100644 Documentation/vm/protection-keys.txt delete mode 100644 Documentation/x86/protection-keys.txt -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org