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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4A08C43217 for ; Mon, 3 Oct 2022 19:42:21 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 329758E0001; Mon, 3 Oct 2022 15:42:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2D90F6B0073; Mon, 3 Oct 2022 15:42:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 152E28E0001; Mon, 3 Oct 2022 15:42:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 009B16B0071 for ; Mon, 3 Oct 2022 15:42:20 -0400 (EDT) Received: from smtpin02.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id CB6011C5F60 for ; Mon, 3 Oct 2022 19:42:20 +0000 (UTC) X-FDA: 79980659640.02.1B9EDDE Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by imf12.hostedemail.com (Postfix) with ESMTP id 362D340015 for ; Mon, 3 Oct 2022 19:42:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664826140; x=1696362140; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=2vg3bLjyeUzK6paD5/QSLqHjaBUk826u4c5n0Pm3n0U=; b=Pv0t7IT7bRZc5INFa8hZiLAXoN/wtlz5fNqxZOxrVEYS6d02Awjwu0bX sep7KfF6a4DF+yvEbQpgsGzO7v/oNKDZRh1yHu8jRct1MP/RRmCOyU2Hf ufhXzd+4wxDmxAL4fGhYmcSBL14SlUvb3hZUrUB/EOoAjAPfOxGP1TbrI bu7kdN10ueT10S4eqa10BaMM7BXmnI+qafGMvsKUyLViti7c1f8rKz0H1 huv08tStyD54BktsxGzvOxhaKhk5QEzsC8KSVh+WFMIlftcy27bE6KWh+ e8nsd3IhVMxWt5sw/8DqnHVLsGF6d6dqHbPiEddZEU4AmB31xcPSZUsEI A==; X-IronPort-AV: E=McAfee;i="6500,9779,10489"; a="366841449" X-IronPort-AV: E=Sophos;i="5.93,366,1654585200"; d="scan'208";a="366841449" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Oct 2022 12:42:18 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10489"; a="692216031" X-IronPort-AV: E=Sophos;i="5.93,366,1654585200"; d="scan'208";a="692216031" Received: from akashred-mobl.amr.corp.intel.com (HELO [10.212.139.217]) ([10.212.139.217]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Oct 2022 12:42:13 -0700 Message-ID: <18be9cae-91e7-c6f6-a5a7-ec7ceefa5523@intel.com> Date: Mon, 3 Oct 2022 12:42:13 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH v2 02/39] x86/cet/shstk: Add Kconfig option for Shadow Stack Content-Language: en-US To: Rick Edgecombe , 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 , Cyrill Gorcunov , 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" , Weijiang Yang , "Kirill A . Shutemov" , joao.moreira@intel.com, John Allen , kcc@google.com, eranian@google.com, rppt@kernel.org, jamorris@linux.microsoft.com, dethoma@microsoft.com Cc: Yu-cheng Yu References: <20220929222936.14584-1-rick.p.edgecombe@intel.com> <20220929222936.14584-3-rick.p.edgecombe@intel.com> From: Dave Hansen In-Reply-To: <20220929222936.14584-3-rick.p.edgecombe@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1664826140; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=ggq3ZuHS+B2BZYqL5QvHoHhzwU6VDrYoawc9smLGYSo=; b=jjB93+NqVm7GKN+8vei2kIm/IIuNyMl7lLrdJM7J3jsZvHxYmxF9Nxirv/rgUYgVHRS4C5 QTcWuPeYs+DvKNxcEBhJDgu982BIHsDWWuS4R0XmOVZHkXDw4dL9yF9s1AQsi96HWSsD9R 86TZ2sKDdgNB6mPeIT+CqmI+AXqnpG4= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=Pv0t7IT7; spf=pass (imf12.hostedemail.com: domain of dave.hansen@intel.com designates 134.134.136.100 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1664826140; a=rsa-sha256; cv=none; b=ZbhinubE2wV394atNLKl0s7QoXmJe29QIU2VWjyjGwZX4wTEV4a+nrcCt2GD+phqknHyNG e9JzIaQb1QQUVf6O20YXwPiMJIpAJyAFXD24iGUb16vuuPbtRmTP/oakWUCAvR9t7WHRAM TgJ+hhXS4/qfSC3putC2Fu3YIZL6rgw= Authentication-Results: imf12.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=Pv0t7IT7; spf=pass (imf12.hostedemail.com: domain of dave.hansen@intel.com designates 134.134.136.100 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (policy=none) header.from=intel.com X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 362D340015 X-Rspam-User: X-Stat-Signature: txjdidrdm3txa5kcxgs5j7d6xzujh5my X-HE-Tag: 1664826139-12744 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 9/29/22 15:28, Rick Edgecombe wrote: > +config X86_SHADOW_STACK > + prompt "X86 Shadow Stack" > + def_bool n > + depends on ARCH_HAS_SHADOW_STACK > + select ARCH_USES_HIGH_VMA_FLAGS > + help > + Shadow Stack protection is a hardware feature that detects function > + return address corruption. Today the kernel's support is limited to > + virtualizing it in KVM guests. > + Is this help text up to date? It seems a bit at odds with the series title.