From patchwork Fri Sep 4 10:30:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Catalin Marinas X-Patchwork-Id: 11756509 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 4873591F for ; Fri, 4 Sep 2020 10:30:36 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 1BE602087C for ; Fri, 4 Sep 2020 10:30:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1BE602087C 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 2A77F6B0037; Fri, 4 Sep 2020 06:30:35 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 22EA76B005C; Fri, 4 Sep 2020 06:30:35 -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 0CFF86B0062; Fri, 4 Sep 2020 06:30:35 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0191.hostedemail.com [216.40.44.191]) by kanga.kvack.org (Postfix) with ESMTP id E634B6B0037 for ; Fri, 4 Sep 2020 06:30:34 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 9907D824556B for ; Fri, 4 Sep 2020 10:30:34 +0000 (UTC) X-FDA: 77225009988.21.page85_4508ee7270b1 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin21.hostedemail.com (Postfix) with ESMTP id 5E2C3180442C2 for ; Fri, 4 Sep 2020 10:30:34 +0000 (UTC) X-Spam-Summary: 1,0,0,592e61278973940e,d41d8cd98f00b204,cmainas@kernel.org,,RULES_HIT:2:41:355:379:541:800:967:973:981:988:989:1260:1311:1314:1345:1437:1515:1535:1605:1730:1747:1777:1792:1801:1981:2194:2199:2393:2525:2559:2563:2682:2685:2730:2859:2892:2896:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3865:3866:3867:3868:3870:3871:3872:3874:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4049:4119:4250:4321:4362:4605:5007:6119:6261:7875:9025:10004:11026:11232:11473:11658:11914:12043:12295:12296:12297:12438:12517:12519:12555:12679:12895:12986:13161:13229:13846:13894:13972:14096:14394:14827:21080:21220:21230:21451:21627:21795:30012:30051:30054:30055:30069:30070:30075:30079,0,RBL:198.145.29.99:@kernel.org:.lbl8.mailshell.net-62.2.0.100 64.100.201.201;04yfjys3t1oo5s63abu9ps4descxxop7rtk3cezxmbww8t8xkycy1yc5qp1qwjx.roumqytf5g87ay363bt71bo98utbtrtpx6tzjgmryu48az8sgy817g38cno7ayb.k-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netchec k:none,D X-HE-Tag: page85_4508ee7270b1 X-Filterd-Recvd-Size: 8117 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf35.hostedemail.com (Postfix) with ESMTP for ; Fri, 4 Sep 2020 10:30:33 +0000 (UTC) Received: from localhost.localdomain (unknown [46.69.195.48]) (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 02596206D4; Fri, 4 Sep 2020 10:30:30 +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 v9 00/29] arm64: Memory Tagging Extension user-space support Date: Fri, 4 Sep 2020 11:30:00 +0100 Message-Id: <20200904103029.32083-1-catalin.marinas@arm.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Rspamd-Queue-Id: 5E2C3180442C2 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 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: That's version 9 of the MTE user-space support (version 8 here [1]). The series is also available on this branch: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux for-next/mte The patches below are missing some acks. If there are any objections, please let me know (acks would be appreciated). I plan to queue them together with the rest of the MTE series. mm: [PATCH v7 07/29] mm: Add PG_arch_2 page flag [PATCH v7 08/29] 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 v9): [PATCH v9 04/29] arm64: kvm: mte: Hide the MTE CPUID information from the guests There have been no further ABI changes and aiming for a 5.10 merge. Minor changes in this version: - Added a separate patch for arm64 KVM which hides the CPUID information and injects an undef exception in the guest if it accesses any of the MTE system registers. - Slight improvement to the CONFIG_ARM64_AS_HAS_MTE comment. - Rebased onto v5.9-rc3. [1] https://lkml.kernel.org/r/20200824182758.27267-1-catalin.marinas@arm.com Thanks. Catalin Marinas (17): arm64: mte: Use Normal Tagged attributes for the linear map arm64: kvm: mte: Hide the MTE CPUID information from the guests 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: 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 | 33 ++ arch/arm64/include/asm/cpucaps.h | 3 +- arch/arm64/include/asm/cpufeature.h | 6 + arch/arm64/include/asm/hwcap.h | 2 +- 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 | 2 +- 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 | 35 ++ arch/arm64/kernel/cpuinfo.c | 2 +- arch/arm64/kernel/entry.S | 37 ++ arch/arm64/kernel/hibernate.c | 118 ++++++ arch/arm64/kernel/mte.c | 336 ++++++++++++++++++ arch/arm64/kernel/process.c | 48 ++- arch/arm64/kernel/ptrace.c | 51 ++- arch/arm64/kernel/signal.c | 9 + arch/arm64/kernel/suspend.c | 4 + arch/arm64/kernel/syscall.c | 10 + arch/arm64/kvm/sys_regs.c | 16 + 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 | 20 +- arch/arm64/mm/mteswap.c | 83 +++++ arch/arm64/mm/proc.S | 32 +- 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, 1764 insertions(+), 62 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