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 192FDC43143 for ; Mon, 1 Oct 2018 12:30:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B98112089C for ; Mon, 1 Oct 2018 12:30:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B98112089C 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 S1729182AbeJATHy (ORCPT ); Mon, 1 Oct 2018 15:07:54 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:30506 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728979AbeJATHy (ORCPT ); Mon, 1 Oct 2018 15:07:54 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 42P1nt5TJlz9ttCY; Mon, 1 Oct 2018 14:30:10 +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 lK3ueqBCeblZ; Mon, 1 Oct 2018 14:30:10 +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 42P1nt4tpXz9ttBl; Mon, 1 Oct 2018 14:30:10 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 118648B968; Mon, 1 Oct 2018 14:30:18 +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 xNnS0bw2gqD6; Mon, 1 Oct 2018 14:30:17 +0200 (CEST) Received: from pc16082vm.idsi0.si.c-s.fr (po15451.idsi0.si.c-s.fr [172.25.231.3]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 8EFA28B95C; Mon, 1 Oct 2018 14:30:17 +0200 (CEST) Received: by pc16082vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 97E9D6F36F; Mon, 1 Oct 2018 12:30:17 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [RFC PATCH v3 0/7] 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: Mon, 1 Oct 2018 12:30:17 +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 RFC v2: - Removed the modification of names in asm-offsets - Created a rule in arch/powerpc/Makefile to append the offset of current->cpu in CFLAGS - Modified asm/smp.h to use the offset set in CFLAGS - Squashed the renaming of THREAD_INFO to TASK_STACK in the preparation patch - Moved the modification of current_pt_regs in the patch activating CONFIG_THREAD_INFO_IN_TASK Changes since RFC 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 (7): book3s/64: avoid circular header inclusion in mmu-hash.h 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/Makefile | 6 +++ 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/processor.h | 39 ++------------- arch/powerpc/include/asm/ptrace.h | 2 +- arch/powerpc/include/asm/reg.h | 2 +- arch/powerpc/include/asm/smp.h | 8 +++- arch/powerpc/include/asm/task_size.h | 42 ++++++++++++++++ arch/powerpc/include/asm/thread_info.h | 17 +------ arch/powerpc/kernel/asm-offsets.c | 8 ++-- arch/powerpc/kernel/entry_32.S | 66 +++++++++----------------- 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 | 14 +++--- arch/powerpc/kernel/head_40x.S | 4 +- arch/powerpc/kernel/head_44x.S | 8 ++-- arch/powerpc/kernel/head_64.S | 1 + arch/powerpc/kernel/head_8xx.S | 2 +- arch/powerpc/kernel/head_booke.h | 12 ++--- arch/powerpc/kernel/head_fsl_booke.S | 16 +++---- 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/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 +- 44 files changed, 203 insertions(+), 345 deletions(-) create mode 100644 arch/powerpc/include/asm/task_size.h -- 2.13.3