From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ADA23C32771 for ; Wed, 22 Jan 2020 21:22:17 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7B1512467A for ; Wed, 22 Jan 2020 21:22:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="D8wcOjJT" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7B1512467A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=K+GoGjucgeXfZ4zxi84DuXKs+Lk74UVpeY8nuL4tdmQ=; b=D8wcOjJT8NskK7 zZGqlYpN6LV6mcKcor2VqHy30JOerVTzv0iw3ml42q7ckqSDzfYHDur6YP1uvOiitYPtxM2mzwZ6Q eedo0kvyvnFTmKmuUn2I6ReWxEgxhqR6/dtaaZxo4yYSRrliWdKZx53AcVamh9lTsTcOjpMhy90l8 iSekgoqYkbyuw5CFK2Fa/ua5Q+yneKDy9tTdupUWRLmjxfZzI8i+qqZgxGPQrwkZZnU6VPBDIaQJ/ 19IvSnVqRZi+9tD7HGL8+qdIyjag4BYHPdDSnOR8+DwcWNETQaLvCQ0kUYpE7i5jY49IFedhAJKKS h48+mWGf+Xjx4CWdejIQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iuNS3-0006xB-9y; Wed, 22 Jan 2020 21:22:15 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iuNRk-0006iB-GY for linux-arm-kernel@lists.infradead.org; Wed, 22 Jan 2020 21:21:58 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2C69231B; Wed, 22 Jan 2020 13:21:50 -0800 (PST) Received: from localhost (unknown [10.37.6.21]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9F3353F52E; Wed, 22 Jan 2020 13:21:49 -0800 (PST) From: Mark Brown To: Catalin Marinas , Will Deacon Subject: [PATCH v5 00/12] arm64: ARMv8.5-A: Branch Target Identification support Date: Wed, 22 Jan 2020 21:21:32 +0000 Message-Id: <20200122212144.6409-1-broonie@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200122_132156_640078_106D1ABA X-CRM114-Status: GOOD ( 14.84 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paul Elliott , Peter Zijlstra , Andrew Jones , Amit Kachhap , Vincenzo Frascino , linux-arch@vger.kernel.org, Marc Zyngier , Eugene Syromiatnikov , Szabolcs Nagy , "H . J . Lu " , Yu-cheng Yu , Kees Cook , Arnd Bergmann , Jann Horn , Richard Henderson , =?UTF-8?q?Kristina=20Mart=C5=A1enko?= , Mark Brown , Alexander Viro , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Florian Weimer , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Sudakshina Das Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org This series implements support for ARMv8.5-A Branch Target Identification (BTI), which is a control flow integrity protection feature introduced as part of the ARMv8.5-A extensions. Changes: v5: - Changed a bunch of -EIO to -ENOEXEC in the ELF parsing code. - Move PSR_BTYPE defines to UAPI. - Use compat_user_mode() rather than open coding. - Fix a typo s/BYTPE/BTYPE/ in syscall.c v4: - Dropped patch fixing existing documentation as it has already been merged. - Convert WARN_ON() to WARN_ON_ONCE() in "ELF: Add ELF program property parsing support". - Added display of guarded pages to ptdump. - Updated for conversion of exception handling from assembler to C. Notes: * GCC 9 can compile backwards-compatible BTI-enabled code with -mbranch-protection=bti or -mbranch-protection=standard. * Binutils trunk supports the new ELF note, but this wasn't in a release the last time I posted this series. (The situation _might_ have changed in the meantime...) Creation of a BTI-enabled binary requires _everything_ linked in to be BTI-enabled. For now ld --force-bti can be used to override this, but some things may break until the required C library support is in place. There is no straightforward way to mark a .s file as BTI-enabled: scraping the output from gcc -S works as a quick hack for now. readelf -n can be used to examing the program properties in an ELF file. * Runtime mmap() and mprotect() can be used to enable BTI on a page-by-page basis using the new PROT_BTI, but the code in the affected pages still needs to be written or compiled to contain the appopriate BTI landing pads. Dave Martin (11): ELF: UAPI and Kconfig additions for ELF program properties ELF: Add ELF program property parsing support mm: Reserve asm-generic prot flag 0x10 for arch use arm64: Basic Branch Target Identification support elf: Allow arch to tweak initial mmap prot flags arm64: elf: Enable BTI at exec based on ELF program properties arm64: BTI: Decode BYTPE bits when printing PSTATE arm64: unify native/compat instruction skipping arm64: traps: Shuffle code to eliminate forward declarations arm64: BTI: Reset BTYPE when skipping emulated instructions KVM: arm64: BTI: Reset BTYPE when skipping emulated instructions Mark Brown (1): arm64: mm: Display guarded pages in ptdump Documentation/arm64/cpu-feature-registers.rst | 2 + Documentation/arm64/elf_hwcaps.rst | 4 + arch/arm64/Kconfig | 29 ++++ arch/arm64/include/asm/cpucaps.h | 3 +- arch/arm64/include/asm/cpufeature.h | 6 + arch/arm64/include/asm/elf.h | 50 ++++++ arch/arm64/include/asm/esr.h | 2 +- arch/arm64/include/asm/exception.h | 1 + arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/asm/kvm_emulate.h | 6 +- arch/arm64/include/asm/mman.h | 37 +++++ arch/arm64/include/asm/pgtable-hwdef.h | 1 + arch/arm64/include/asm/pgtable.h | 2 +- arch/arm64/include/asm/ptrace.h | 1 + arch/arm64/include/asm/sysreg.h | 4 + arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/include/uapi/asm/mman.h | 9 ++ arch/arm64/include/uapi/asm/ptrace.h | 9 ++ arch/arm64/kernel/cpufeature.c | 33 ++++ arch/arm64/kernel/cpuinfo.c | 1 + arch/arm64/kernel/entry-common.c | 11 ++ arch/arm64/kernel/process.c | 36 ++++- arch/arm64/kernel/ptrace.c | 2 +- arch/arm64/kernel/signal.c | 16 ++ arch/arm64/kernel/syscall.c | 18 +++ arch/arm64/kernel/traps.c | 127 +++++++-------- arch/arm64/mm/dump.c | 5 + fs/Kconfig.binfmt | 6 + fs/binfmt_elf.c | 145 +++++++++++++++++- fs/compat_binfmt_elf.c | 4 + include/linux/elf.h | 43 ++++++ include/linux/mm.h | 3 + include/uapi/asm-generic/mman-common.h | 1 + include/uapi/linux/elf.h | 11 ++ 34 files changed, 555 insertions(+), 75 deletions(-) create mode 100644 arch/arm64/include/asm/mman.h create mode 100644 arch/arm64/include/uapi/asm/mman.h -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel