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_HELO_NONE,SPF_PASS 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 D4200C433E1 for ; Fri, 19 Jun 2020 15:07:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B423D21D7A for ; Fri, 19 Jun 2020 15:07:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391069AbgFSPHG (ORCPT ); Fri, 19 Jun 2020 11:07:06 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:35897 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390694AbgFSPGz (ORCPT ); Fri, 19 Jun 2020 11:06:55 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 49pMbF4KHNz9v09k; Fri, 19 Jun 2020 17:06:49 +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 MKUyKzZbmliB; Fri, 19 Jun 2020 17:06:49 +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 49pMbF3KBSz9v09j; Fri, 19 Jun 2020 17:06:49 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 803898B879; Fri, 19 Jun 2020 17:06:51 +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 txvLaR4ia8Ej; Fri, 19 Jun 2020 17:06:51 +0200 (CEST) Received: from pc16570vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 4E4088B868; Fri, 19 Jun 2020 17:06:51 +0200 (CEST) Received: by pc16570vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 11F0B65AF4; Fri, 19 Jun 2020 15:06:50 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [PATCH v1 0/8] powerpc/32s: Allocate modules outside of vmalloc space for STRICT_KERNEL_RWX To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Fri, 19 Jun 2020 15:06:50 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On book3s32 (hash), exec protection is set per 256Mb segments with NX bit. Instead of clearing NX bit on vmalloc space when CONFIG_MODULES is selected, allocate modules in a dedicated segment (0xb0000000-0xbfffffff by default). This allows to keep exec protection on vmalloc space while allowing exec on modules. Christophe Leroy (8): powerpc/ptdump: Refactor update of st->last_pa powerpc/ptdump: Refactor update of pg_state powerpc: Set user/kernel boundary at TASK_SIZE instead of PAGE_OFFSET powerpc/lib: Prepare code-patching for modules allocated outside vmalloc space powerpc: Use MODULES_VADDR if defined powerpc/32s: Only leave NX unset on segments used for modules powerpc/32s: Kernel space starts at TASK_SIZE powerpc/32s: Use dedicated segment for modules with STRICT_KERNEL_RWX arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/book3s/32/pgtable.h | 15 ++---- arch/powerpc/include/asm/page.h | 2 +- arch/powerpc/kernel/head_32.S | 12 ++--- arch/powerpc/kernel/module.c | 11 ++++ arch/powerpc/lib/code-patching.c | 2 +- arch/powerpc/mm/book3s32/hash_low.S | 2 +- arch/powerpc/mm/book3s32/mmu.c | 17 +++++-- arch/powerpc/mm/kasan/kasan_init_32.c | 6 +++ arch/powerpc/mm/ptdump/ptdump.c | 53 ++++++++++++-------- 10 files changed, 78 insertions(+), 43 deletions(-) -- 2.25.0