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=-10.4 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 05097C433E0 for ; Thu, 4 Feb 2021 21:50:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B2DF564FAA for ; Thu, 4 Feb 2021 21:50:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229736AbhBDVuK (ORCPT ); Thu, 4 Feb 2021 16:50:10 -0500 Received: from mga14.intel.com ([192.55.52.115]:4838 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229613AbhBDVti (ORCPT ); Thu, 4 Feb 2021 16:49:38 -0500 IronPort-SDR: pY+Nr6jAgIxyBSpAvvvsgXOwo2hNItuw9siAkK7SOvOxAnkVR0xZ2PX5iO24yXStyRd4G6C3S7 yUGldeJTw3/w== X-IronPort-AV: E=McAfee;i="6000,8403,9885"; a="180557971" X-IronPort-AV: E=Sophos;i="5.81,153,1610438400"; d="scan'208";a="180557971" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Feb 2021 13:48:49 -0800 IronPort-SDR: myV1KE9j7kkbr5D5pXV2bGsPNu9vv8X5WxtJ9c2sz4znxzOvH794zrs0zwYjGwOu0gcq//xvG6 PNYTZBCr3OEg== X-IronPort-AV: E=Sophos;i="5.81,153,1610438400"; d="scan'208";a="393459920" Received: from yyu32-mobl1.amr.corp.intel.com (HELO [10.209.100.6]) ([10.209.100.6]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Feb 2021 13:48:34 -0800 Subject: Re: [PATCH v19 12/25] mm: Introduce VM_SHSTK for shadow stack memory To: Cyrill Gorcunov Cc: x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Borislav Petkov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue , Dave Martin , Weijiang Yang , Pengfei Xu References: <20210203225547.32221-1-yu-cheng.yu@intel.com> <20210203225547.32221-13-yu-cheng.yu@intel.com> <20210204204636.GH2172@grain> From: "Yu, Yu-cheng" Message-ID: <44f18779-efdb-e3f9-55d4-b46fb35d60cd@intel.com> Date: Thu, 4 Feb 2021 13:48:34 -0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <20210204204636.GH2172@grain> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/4/2021 12:46 PM, Cyrill Gorcunov wrote: > On Wed, Feb 03, 2021 at 02:55:34PM -0800, Yu-cheng Yu wrote: >> >> diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c >> index 602e3a52884d..59623dcd92bb 100644 >> --- a/fs/proc/task_mmu.c >> +++ b/fs/proc/task_mmu.c >> @@ -661,6 +661,9 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma) >> [ilog2(VM_PKEY_BIT4)] = "", >> #endif >> #endif /* CONFIG_ARCH_HAS_PKEYS */ >> +#ifdef CONFIG_X86_CET >> + [ilog2(VM_SHSTK)] = "ss", >> +#endif >> }; > > IIRC we've these abbreviations explained in documentaion > (proc.rst file). Could you please update it once time > permit? I think it can be done on top of the series. > I will add that. Thanks!