From patchwork Wed Jul 15 17:08:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Catalin Marinas X-Patchwork-Id: 11665965 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 94C406C1 for ; Wed, 15 Jul 2020 17:08:51 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 6078B20663 for ; Wed, 15 Jul 2020 17:08:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6078B20663 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 6D42A8D0001; Wed, 15 Jul 2020 13:08:50 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 65CFE6B0005; Wed, 15 Jul 2020 13:08:50 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 54C188D0001; Wed, 15 Jul 2020 13:08:50 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0002.hostedemail.com [216.40.44.2]) by kanga.kvack.org (Postfix) with ESMTP id 383736B0002 for ; Wed, 15 Jul 2020 13:08:50 -0400 (EDT) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id BAD572C89 for ; Wed, 15 Jul 2020 17:08:49 +0000 (UTC) X-FDA: 77040944778.16.nest34_551543426efb Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin16.hostedemail.com (Postfix) with ESMTP id 85812100E690C for ; Wed, 15 Jul 2020 17:08:49 +0000 (UTC) X-Spam-Summary: 1,0,0,91bcaecccd067117,d41d8cd98f00b204,cmainas@kernel.org,,RULES_HIT:2:41:355:379:541:800:967:973:981:988:989:1260:1311:1314:1345:1437:1515:1535:1605:1730:1747:1777:1792:1801:2194:2198:2199:2200:2393:2525:2553:2559:2566:2570:2682:2685:2693:2703:2730:2859:2895:2896:2901:2933:2937:2939:2942:2945:2947:2951:2954:3022:3865:3866:3867:3868:3870:3871:3872:3874:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4050:4119:4250:4321:4605:5007:6117:6119:6261:7875:9025:10004:11658:13161:13229:14827,0,RBL:198.145.29.99:@kernel.org:.lbl8.mailshell.net-62.2.0.100 64.100.201.201;04yrbuhbd87byme5dwabzgc6zati3ypwy9sfw438i35j8bj5nbs17s3spnx6kxc.u7m1g7in93gn6sizj6wjqo9saxsx3g1jhndr4nj87pwktuup9wb1zuax7xxbxut.4-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: nest34_551543426efb X-Filterd-Recvd-Size: 8795 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf45.hostedemail.com (Postfix) with ESMTP for ; Wed, 15 Jul 2020 17:08:48 +0000 (UTC) Received: from localhost.localdomain (unknown [95.146.230.158]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4885F2065E; Wed, 15 Jul 2020 17:08:46 +0000 (UTC) From: Catalin Marinas To: linux-arm-kernel@lists.infradead.org Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org, Will Deacon , Dave P Martin , Vincenzo Frascino , Szabolcs Nagy , Kevin Brodsky , Andrey Konovalov , Peter Collingbourne , Andrew Morton Subject: [PATCH v7 00/26] arm64: Memory Tagging Extension user-space support Date: Wed, 15 Jul 2020 18:08:15 +0100 Message-Id: <20200715170844.30064-1-catalin.marinas@arm.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Rspamd-Queue-Id: 85812100E690C X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 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: This is version 7 (6th version here [1]) of the series adding user-space support for the ARMv8.5 Memory Tagging Extension ([2], [3]). The patches are also available on this branch: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux for-next/mte There have been no further ABI changes and still aiming for a 5.9 merge. I would be grateful for acks (or naks) on the following patches: mm: [PATCH v7 06/29] mm: Add PG_arch_2 page flag [PATCH v7 07/29] mm: Preserve the PG_arch_2 flag in __split_huge_page_tail() [PATCH v7 13/29] mm: Introduce arch_calc_vm_flag_bits() fs: [PATCH v7 24/29] fs: Handle intra-page faults in copy_mount_options() arm64 KVM (small new addition in v7): [PATCH v7 02/29] arm64: mte: CPU feature detection and initial sysreg configuration Changes in this version: - __split_huge_page_tail() function update to preserve the PG_arch_2 flag only. The PG_arch_1 will be submitted separately since s390 and x86 may be affected. - ptrace NT_ARM_TAGGED_ADDR_CTRL regset for access to the tagged address ABI and MTE configuration of a process, together with documentation update. - Kconfig update to check for the presence of the STGM instruction in addition to '.arch armv8.5-a+memtag'. A late architecture update introduced the LDGM/STGM and there are binutils versions out there that don't support it. - Re-ordering of the CNP and MTE initialisation to cater for late secondary CPU bring-up (post the arch_initcall()). [1] https://lore.kernel.org/linux-arm-kernel/20200703153718.16973-1-catalin.marinas@arm.com/ [2] https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/enhancing-memory-safety [3] https://developer.arm.com/-/media/Arm%20Developer%20Community/PDF/Arm_Memory_Tagging_Extension_Whitepaper.pdf [4] https://sourceware.org/pipermail/libc-alpha/2020-June/115039.html Catalin Marinas (17): arm64: mte: Use Normal Tagged attributes for the linear map mm: Preserve the PG_arch_2 flag in __split_huge_page_tail() arm64: mte: Clear the tags when a page is mapped in user-space with PROT_MTE arm64: Avoid unnecessary clear_user_page() indirection arm64: mte: Tags-aware aware memcmp_pages() implementation arm64: mte: Handle the MAIR_EL1 changes for late CPU bring-up arm64: mte: Add PROT_MTE support to mmap() and mprotect() mm: Introduce arch_validate_flags() arm64: mte: Validate the PROT_MTE request via arch_validate_flags() mm: Allow arm64 mmap(PROT_MTE) on RAM-based files arm64: mte: Allow user control of the tag check mode via prctl() arm64: mte: Allow user control of the generated random tags via prctl() arm64: mte: Restore the GCR_EL1 register after a suspend arm64: mte: Allow {set,get}_tagged_addr_ctrl() on non-current tasks arm64: mte: ptrace: Add PTRACE_{PEEK,POKE}MTETAGS support arm64: mte: ptrace: Add NT_ARM_TAGGED_ADDR_CTRL regset fs: Handle intra-page faults in copy_mount_options() Kevin Brodsky (1): mm: Introduce arch_calc_vm_flag_bits() Steven Price (4): mm: Add PG_arch_2 page flag mm: Add arch hooks for saving/restoring tags arm64: mte: Enable swap of tagged pages arm64: mte: Save tags when hibernating Vincenzo Frascino (7): arm64: mte: system register definitions arm64: mte: CPU feature detection and initial sysreg configuration arm64: mte: Add specific SIGSEGV codes arm64: mte: Handle synchronous and asynchronous tag check faults arm64: mte: Tags-aware copy_{user_,}highpage() implementations arm64: mte: Kconfig entry arm64: mte: Add Memory Tagging Extension documentation Documentation/arm64/cpu-feature-registers.rst | 2 + Documentation/arm64/elf_hwcaps.rst | 4 + Documentation/arm64/index.rst | 1 + .../arm64/memory-tagging-extension.rst | 305 ++++++++++++++++ arch/arm64/Kconfig | 31 ++ arch/arm64/include/asm/cpucaps.h | 5 +- arch/arm64/include/asm/cpufeature.h | 6 + arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/asm/kvm_arm.h | 3 +- arch/arm64/include/asm/memory.h | 17 +- arch/arm64/include/asm/mman.h | 56 ++- arch/arm64/include/asm/mte.h | 86 +++++ arch/arm64/include/asm/page.h | 19 +- arch/arm64/include/asm/pgtable-prot.h | 2 + arch/arm64/include/asm/pgtable.h | 46 ++- arch/arm64/include/asm/processor.h | 12 +- arch/arm64/include/asm/sysreg.h | 61 ++++ arch/arm64/include/asm/thread_info.h | 4 +- arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/include/uapi/asm/mman.h | 1 + arch/arm64/include/uapi/asm/ptrace.h | 4 + arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/cpufeature.c | 67 ++++ arch/arm64/kernel/cpuinfo.c | 1 + arch/arm64/kernel/entry.S | 37 ++ arch/arm64/kernel/hibernate.c | 118 ++++++ arch/arm64/kernel/mte.c | 337 ++++++++++++++++++ arch/arm64/kernel/process.c | 45 ++- arch/arm64/kernel/ptrace.c | 53 ++- arch/arm64/kernel/signal.c | 9 + arch/arm64/kernel/suspend.c | 4 + arch/arm64/kernel/syscall.c | 10 + arch/arm64/kvm/sys_regs.c | 2 + arch/arm64/lib/Makefile | 2 + arch/arm64/lib/mte.S | 151 ++++++++ arch/arm64/mm/Makefile | 1 + arch/arm64/mm/copypage.c | 25 +- arch/arm64/mm/dump.c | 4 + arch/arm64/mm/fault.c | 9 +- arch/arm64/mm/mmu.c | 22 +- arch/arm64/mm/mteswap.c | 83 +++++ arch/arm64/mm/proc.S | 8 +- arch/x86/kernel/signal_compat.c | 2 +- fs/namespace.c | 25 +- fs/proc/page.c | 3 + fs/proc/task_mmu.c | 4 + include/linux/kernel-page-flags.h | 1 + include/linux/mm.h | 8 + include/linux/mman.h | 23 +- include/linux/page-flags.h | 3 + include/linux/pgtable.h | 28 ++ include/trace/events/mmflags.h | 9 +- include/uapi/asm-generic/siginfo.h | 4 +- include/uapi/linux/elf.h | 1 + include/uapi/linux/prctl.h | 9 + mm/huge_memory.c | 3 + mm/mmap.c | 9 + mm/mprotect.c | 6 + mm/page_io.c | 10 + mm/shmem.c | 9 + mm/swapfile.c | 2 + mm/util.c | 2 +- tools/vm/page-types.c | 2 + 63 files changed, 1760 insertions(+), 59 deletions(-) create mode 100644 Documentation/arm64/memory-tagging-extension.rst create mode 100644 arch/arm64/include/asm/mte.h create mode 100644 arch/arm64/kernel/mte.c create mode 100644 arch/arm64/lib/mte.S create mode 100644 arch/arm64/mm/mteswap.c