From patchwork Mon May 14 09:46:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Rutland X-Patchwork-Id: 135701 Delivered-To: patch@linaro.org Received: by 2002:a2e:9706:0:0:0:0:0 with SMTP id r6-v6csp1531094lji; Mon, 14 May 2018 02:47:01 -0700 (PDT) X-Google-Smtp-Source: AB8JxZp3OL5SA/wxBhFNvxFk/yAsRa5v7lMd6G3H6thY8H1TcsleXfJb4OyGdZ0qNxC+7d3d8cwH X-Received: by 2002:a63:a807:: with SMTP id o7-v6mr7922796pgf.153.1526291220999; Mon, 14 May 2018 02:47:00 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1526291220; cv=none; d=google.com; s=arc-20160816; b=wQDo09xosC7kwvEINaMFeGaew3075KaiGVTxL89YUlvd4CzRtpiBbUBw+pu37F4iD2 RTAXnmtm8DL31fJy8elHKXAeU2hE2eijdW9ZIOp5xY5Corx2XVrNE7WJBpYXF2VtwTnF QmV7SJXrpdcqsT0AHy8ueJ5vFLx8l0AGPxtJLmAB6d+G50a3HEfUJo3vD5XLH3PdAJEa R5scsFIZ334yXuOmqH+Stf5vyMO5c0qa4ZNfkqsmbSwku3LFNURtX8mtVuGb0pEIbpM2 ZtGbilCeKutS7xWSsOWds2HfF9l1epAJGJ3IRI4VxkUbZxRhAVGx0sz6de6ivqpvfvcp kAqg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from :arc-authentication-results; bh=wKO0CZaS8a6+vov8EqCAb0FEQmQoHyYU+ODIz1s8dGs=; b=We5MjBe4T85TF5KNqBzIgFPb+rxtZSjMYSzATyz1robMnlmcHGNwET9Luuqy8ZEYUd DOjb8hzFVw3mw4aGBuv8sbA4DdPvToD6j7lqizAQaHRp0egx7RlWJIOXh6juBrbxATM3 U5vlT7yQTq+Hi9kguB0gHKCnYBM6hhIIHzJr84jfn+uNtYITBfOgEUNcbcjf348kYabI VpR7kg9Fn5OzIAVw2aN7EYR7hLV+sz8/e9MGn0rEJPxBtH/iFuIZoiX1LC0xeBd1erlR 4PTpimEvs7pnuGQwxMSzzGNY5ZqdVL/elo/4O6Ka40ZzaxJ7unWM0XeplqYVX2uPwGzr +c/A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id ba9-v6si9346936plb.110.2018.05.14.02.47.00; Mon, 14 May 2018 02:47:00 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752127AbeENJq5 (ORCPT + 29 others); Mon, 14 May 2018 05:46:57 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:38168 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751780AbeENJq4 (ORCPT ); Mon, 14 May 2018 05:46:56 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B79821435; Mon, 14 May 2018 02:46:55 -0700 (PDT) Received: from lakrids.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C96BD3F25D; Mon, 14 May 2018 02:46:53 -0700 (PDT) From: Mark Rutland To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, catalin.marinas@arm.com, dave.martin@arm.com, james.morse@arm.com, linux@dominikbrodowski.net, linux-fsdevel@vger.kernel.org, marc.zyngier@arm.com, mark.rutland@arm.com, viro@zeniv.linux.org.uk, will.deacon@arm.com Subject: [PATCH 00/18] arm64: invoke syscalls with pt_regs Date: Mon, 14 May 2018 10:46:22 +0100 Message-Id: <20180514094640.27569-1-mark.rutland@arm.com> X-Mailer: git-send-email 2.11.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series reworks arm64's syscall handling to minimize the propagation of user-controlled register values into speculated code paths. As with x86 [1], a wrapper is generated for each syscall, which extracts the argument from a struct pt_regs. During kernel entry from userspace, registers are zeroed. The arm64 kernel code directly invokes some syscalls which the x86 code doesn't, so I've added ksys_* wrappers for these, following the x86 example. The rest of the series is arm64-specific. I've pushed the series out to my arm64/syscall-regs branch [2] on kernel.org. Thanks, Mark. [1] https://lkml.kernel.org/r/20180330093720.6780-1-linux@dominikbrodowski.net [2] git://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git Mark Rutland (18): arm64: consistently use unsigned long for thread flags arm64: move SCTLR_EL{1,2} assertions to arm64: introduce sysreg_clear_set() arm64: kill config_sctlr_el1() arm64: kill change_cpacr() arm64: move sve_user_{enable,disable} to arm64: remove sigreturn wrappers arm64: convert raw syscall invocation to C arm64: convert syscall trace logic to C arm64: convert native/compat syscall entry to C arm64: zero GPRs upon entry from EL0 kernel: add ksys_personality() kernel: add kcompat_sys_{f,}statfs64() arm64: remove in-kernel call to sys_personality() arm64: use {COMPAT,}SYSCALL_DEFINE0 for sigreturn arm64: use SYSCALL_DEFINE6() for mmap arm64: convert compat wrappers to C arm64: implement syscall wrappers arch/arm64/Kconfig | 1 + arch/arm64/include/asm/fpsimd.h | 17 ++++- arch/arm64/include/asm/syscall_wrapper.h | 80 ++++++++++++++++++++ arch/arm64/include/asm/sysreg.h | 33 ++++---- arch/arm64/include/asm/unistd32.h | 26 +++---- arch/arm64/kernel/Makefile | 5 +- arch/arm64/kernel/armv8_deprecated.c | 8 +- arch/arm64/kernel/cpu_errata.c | 3 +- arch/arm64/kernel/entry.S | 126 +++---------------------------- arch/arm64/kernel/entry32.S | 121 ----------------------------- arch/arm64/kernel/fpsimd.c | 20 ----- arch/arm64/kernel/signal.c | 5 +- arch/arm64/kernel/signal32.c | 6 +- arch/arm64/kernel/sys.c | 19 +++-- arch/arm64/kernel/sys32.c | 116 ++++++++++++++++++++++++---- arch/arm64/kernel/syscall.c | 113 +++++++++++++++++++++++++++ arch/arm64/kernel/traps.c | 4 +- arch/arm64/mm/fault.c | 2 +- fs/statfs.c | 14 +++- include/linux/syscalls.h | 9 +++ kernel/exec_domain.c | 7 +- 21 files changed, 411 insertions(+), 324 deletions(-) create mode 100644 arch/arm64/include/asm/syscall_wrapper.h delete mode 100644 arch/arm64/kernel/entry32.S create mode 100644 arch/arm64/kernel/syscall.c -- 2.11.0