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=-9.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 405A8C433E4 for ; Mon, 27 Jul 2020 07:26:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24AFA20738 for ; Mon, 27 Jul 2020 07:26:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726897AbgG0H0r (ORCPT ); Mon, 27 Jul 2020 03:26:47 -0400 Received: from ozlabs.org ([203.11.71.1]:43153 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726116AbgG0H0r (ORCPT ); Mon, 27 Jul 2020 03:26:47 -0400 Received: by ozlabs.org (Postfix, from userid 1034) id 4BFWZs6fFyz9sTQ; Mon, 27 Jul 2020 17:26:45 +1000 (AEST) From: Michael Ellerman To: Michael Ellerman , Christophe Leroy , Benjamin Herrenschmidt , Paul Mackerras Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org In-Reply-To: References: Subject: Re: [PATCH v2 0/6] powerpc/32s: Allocate modules outside of vmalloc space for STRICT_KERNEL_RWX Message-Id: <159583478807.602200.856546124460688008.b4-ty@ellerman.id.au> Date: Mon, 27 Jul 2020 17:26:45 +1000 (AEST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 29 Jun 2020 11:15:19 +0000 (UTC), Christophe Leroy wrote: > 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. > > v2: > - Removed the two patches that fix ptdump. Will submitted independently > - Only changing the user/kernel boundary for PPC32 now. > - Reordered the patches inside the series. > > [...] Applied to powerpc/next. [1/6] powerpc/lib: Prepare code-patching for modules allocated outside vmalloc space https://git.kernel.org/powerpc/c/ccc8fcf72a6953fbfd6998999d622295f522b952 [2/6] powerpc: Use MODULES_VADDR if defined https://git.kernel.org/powerpc/c/7fbc22ce29931630da200cfc90fe5a454f54a794 [3/6] powerpc/32s: Only leave NX unset on segments used for modules https://git.kernel.org/powerpc/c/c496433197154144c310a17939736bc5c155914d [4/6] powerpc/32: Set user/kernel boundary at TASK_SIZE instead of PAGE_OFFSET https://git.kernel.org/powerpc/c/b6be1bb7f7216b9e9f33f57abe6e3290c0e66bd4 [5/6] powerpc/32s: Kernel space starts at TASK_SIZE https://git.kernel.org/powerpc/c/f1a1f7a15eb0e13b84791ff2738b84e414501718 [6/6] powerpc/32s: Use dedicated segment for modules with STRICT_KERNEL_RWX https://git.kernel.org/powerpc/c/6ca055322da8fe25ff9ac50db6f3b7b59b6f961c cheers