From patchwork Wed Feb 23 12:02:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 12756847 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 972EDC433F5 for ; Wed, 23 Feb 2022 12:03:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240321AbiBWMD3 (ORCPT ); Wed, 23 Feb 2022 07:03:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34998 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240267AbiBWMDO (ORCPT ); Wed, 23 Feb 2022 07:03:14 -0500 Received: from pegase2.c-s.fr (pegase2.c-s.fr [93.17.235.10]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 978ED9A4F2; Wed, 23 Feb 2022 04:02:47 -0800 (PST) Received: from localhost (mailhub3.si.c-s.fr [172.26.127.67]) by localhost (Postfix) with ESMTP id 4K3ZRH0zw5z9sSp; Wed, 23 Feb 2022 13:02:35 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase2.c-s.fr ([172.26.127.65]) by localhost (pegase2.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fdRTHS91z5Eb; Wed, 23 Feb 2022 13:02:35 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase2.c-s.fr (Postfix) with ESMTP id 4K3ZRC1vpFz9sSZ; Wed, 23 Feb 2022 13:02:31 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 322AE8B778; Wed, 23 Feb 2022 13:02:31 +0100 (CET) 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 1iYLXu2sbge3; Wed, 23 Feb 2022 13:02:31 +0100 (CET) Received: from PO20335.IDSI0.si.c-s.fr (unknown [192.168.7.201]) by messagerie.si.c-s.fr (Postfix) with ESMTP id C57C48B77C; Wed, 23 Feb 2022 13:02:30 +0100 (CET) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 21NC2Kpc1148173 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Wed, 23 Feb 2022 13:02:21 +0100 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 21NC2JkP1148171; Wed, 23 Feb 2022 13:02:19 +0100 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Luis Chamberlain , Aaron Tomlin Cc: Christophe Leroy , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kgdb-bugreport@lists.sourceforge.net, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-modules@vger.kernel.org Subject: [PATCH v6 0/6] Allocate module text and data separately Date: Wed, 23 Feb 2022 13:02:10 +0100 Message-Id: X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1645617734; l=2137; s=20211009; h=from:subject:message-id; bh=5pa1UQ3HwyDZehywSQbAA8grWbJFM4jhq6fIuvgQR1I=; b=jJdm2BkQa9gEif7ktMD48MnhsQfgiuYZWvlcjGqSQAFNn+F4jLeHP92Z3FVUqVGswk4EzrSMHpf7 NMKzfvJiAla9UWgpQe57Sbh0hIA1WZxEqiQX3SY3RU2XBwRh4Nj1 X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= Precedence: bulk List-ID: This series applies on top of my series "miscellanuous cleanups" v4. This series allow architectures to request having modules data in vmalloc area instead of module area. This is required on powerpc book3s/32 in order to set data non executable, because it is not possible to set executability on page basis, this is done per 256 Mbytes segments. The module area has exec right, vmalloc area has noexec. Without this change module data remains executable regardless of CONFIG_STRICT_MODULES_RWX. This can also be useful on other powerpc/32 in order to maximize the chance of code being close enough to kernel core to avoid branch trampolines. Changes in v6: - Rebased on top of my series "miscellanuous cleanups" v4 Changes in v5: - Rebased on top of Aaron's series "module: core code clean up" v8 Changes in v4: - Rebased on top of Aaron's series "module: core code clean up" v6 Changes in v3: - Fixed the tree for data_layout at one place (Thanks Miroslav) - Moved removal of module_addr_min/module_addr_max macro out of patch 1 in a new patch at the end of the series to reduce churn. Changes in v2: - Dropped first two patches which are not necessary. They may be added back later as a follow-up series. - Fixed the printks in GDB Christophe Leroy (6): module: Always have struct mod_tree_root module: Prepare for handling several RB trees module: Introduce data_layout module: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC module: Remove module_addr_min and module_addr_max powerpc: Select ARCH_WANTS_MODULES_DATA_IN_VMALLOC on book3s/32 and 8xx arch/Kconfig | 6 +++ arch/powerpc/Kconfig | 1 + include/linux/module.h | 8 +++ kernel/debug/kdb/kdb_main.c | 10 +++- kernel/module/internal.h | 13 +++-- kernel/module/kallsyms.c | 18 +++---- kernel/module/main.c | 103 +++++++++++++++++++++++++++--------- kernel/module/procfs.c | 8 ++- kernel/module/strict_rwx.c | 11 ++-- kernel/module/tree_lookup.c | 28 ++++++---- 10 files changed, 150 insertions(+), 56 deletions(-)