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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 03D85C43382 for ; Tue, 25 Sep 2018 12:10:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ABB2B20676 for ; Tue, 25 Sep 2018 12:10:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ABB2B20676 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728898AbeIYSRw (ORCPT ); Tue, 25 Sep 2018 14:17:52 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:28311 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726586AbeIYSRw (ORCPT ); Tue, 25 Sep 2018 14:17:52 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 42KKf45Kdhz9ttS8; Tue, 25 Sep 2018 14:10:36 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id mU6sqjy9lsa9; Tue, 25 Sep 2018 14:10:36 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 42KKf44MGtz9ttS2; Tue, 25 Sep 2018 14:10:36 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 40F3B8B7DC; Tue, 25 Sep 2018 14:10:36 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id 3wbDTh8Oi9OG; Tue, 25 Sep 2018 14:10:36 +0200 (CEST) Received: from pc16082vm.idsi0.si.c-s.fr (unknown [192.168.232.3]) by messagerie.si.c-s.fr (Postfix) with ESMTP id E37278B7DB; Tue, 25 Sep 2018 14:10:35 +0200 (CEST) Received: by pc16082vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 9E7D070AF2; Tue, 25 Sep 2018 12:10:35 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [RFC PATCH v2 0/9] powerpc: Switch to CONFIG_THREAD_INFO_IN_TASK To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , aneesh.kumar@linux.vnet.ibm.com, npiggin@gmail.com Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Tue, 25 Sep 2018 12:10:35 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The purpose of this serie is to activate CONFIG_THREAD_INFO_IN_TASK which moves the thread_info into task_struct. Moving thread_info into task_struct has the following advantages: - It protects thread_info from corruption in the case of stack overflows. - Its address is harder to determine if stack addresses are leaked, making a number of attacks more difficult. Changes since v1: - Removed the first patch which was modifying header inclusion order in timer - Modified some names in asm-offsets to avoid conflicts when including asm-offsets in C files - Modified asm/smp.h to avoid having to include linux/sched.h (using asm-offsets instead) - Moved some changes from the activation patch to the preparation patch. Christophe Leroy (9): book3s/64: avoid circular header inclusion in mmu-hash.h powerpc: change name THREAD_INFO to TASK_STACK powerpc: clear redundancies in asm-offset.c powerpc: Prepare for moving thread_info into task_struct powerpc: Activate CONFIG_THREAD_INFO_IN_TASK powerpc: regain entire stack space powerpc: 'current_set' is now a table of task_struct pointers powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU powerpc/64: Modify CURRENT_THREAD_INFO() arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/asm-prototypes.h | 4 +- arch/powerpc/include/asm/book3s/64/mmu-hash.h | 2 +- arch/powerpc/include/asm/exception-64s.h | 4 +- arch/powerpc/include/asm/irq.h | 14 ++-- arch/powerpc/include/asm/livepatch.h | 2 +- arch/powerpc/include/asm/mmu-44x.h | 8 +-- arch/powerpc/include/asm/processor.h | 39 +----------- arch/powerpc/include/asm/ptrace.h | 2 +- arch/powerpc/include/asm/reg.h | 2 +- arch/powerpc/include/asm/smp.h | 14 +++- arch/powerpc/include/asm/task_size.h | 42 ++++++++++++ arch/powerpc/include/asm/thread_info.h | 17 +---- arch/powerpc/kernel/asm-offsets.c | 37 ++++++----- arch/powerpc/kernel/entry_32.S | 88 ++++++++++---------------- arch/powerpc/kernel/entry_64.S | 12 ++-- arch/powerpc/kernel/epapr_hcalls.S | 5 +- arch/powerpc/kernel/exceptions-64e.S | 13 +--- arch/powerpc/kernel/exceptions-64s.S | 2 +- arch/powerpc/kernel/head_32.S | 16 ++--- arch/powerpc/kernel/head_40x.S | 6 +- arch/powerpc/kernel/head_44x.S | 10 +-- arch/powerpc/kernel/head_64.S | 3 +- arch/powerpc/kernel/head_8xx.S | 4 +- arch/powerpc/kernel/head_booke.h | 12 +--- arch/powerpc/kernel/head_fsl_booke.S | 18 +++--- arch/powerpc/kernel/idle_6xx.S | 8 +-- arch/powerpc/kernel/idle_book3e.S | 2 +- arch/powerpc/kernel/idle_e500.S | 8 +-- arch/powerpc/kernel/idle_power4.S | 2 +- arch/powerpc/kernel/irq.c | 66 +++---------------- arch/powerpc/kernel/kgdb.c | 28 -------- arch/powerpc/kernel/machine_kexec_64.c | 6 +- arch/powerpc/kernel/misc_32.S | 17 ++--- arch/powerpc/kernel/process.c | 15 ++--- arch/powerpc/kernel/setup-common.c | 2 +- arch/powerpc/kernel/setup_32.c | 15 ++--- arch/powerpc/kernel/setup_64.c | 29 ++------- arch/powerpc/kernel/smp.c | 16 ++--- arch/powerpc/kernel/trace/ftrace_64_mprofile.S | 6 +- arch/powerpc/kernel/vdso32/gettimeofday.S | 4 +- arch/powerpc/kvm/book3s_hv_hmi.c | 1 + arch/powerpc/mm/hash_low_32.S | 14 ++-- arch/powerpc/sysdev/6xx-suspend.S | 5 +- arch/powerpc/xmon/xmon.c | 2 +- 45 files changed, 243 insertions(+), 380 deletions(-) create mode 100644 arch/powerpc/include/asm/task_size.h -- 2.13.3