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=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 B58A9C46466 for ; Fri, 18 Sep 2020 19:23:33 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 6DB4723718 for ; Fri, 18 Sep 2020 19:23:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6DB4723718 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 0E8686B0037; Fri, 18 Sep 2020 15:23:33 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 099666B0055; Fri, 18 Sep 2020 15:23:33 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EC9926B005A; Fri, 18 Sep 2020 15:23:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0028.hostedemail.com [216.40.44.28]) by kanga.kvack.org (Postfix) with ESMTP id D5F0B6B0037 for ; Fri, 18 Sep 2020 15:23:32 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 959088249980 for ; Fri, 18 Sep 2020 19:23:32 +0000 (UTC) X-FDA: 77277156264.08.blade02_420bc062712d Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin08.hostedemail.com (Postfix) with ESMTP id 770911819E766 for ; Fri, 18 Sep 2020 19:23:32 +0000 (UTC) X-HE-Tag: blade02_420bc062712d X-Filterd-Recvd-Size: 4108 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by imf13.hostedemail.com (Postfix) with ESMTP for ; Fri, 18 Sep 2020 19:23:31 +0000 (UTC) IronPort-SDR: duy7v7Z6D2THPCmXvtkXXguXYm4fFsqPQviDzyVxfDY8ZLYNAloNcFDhh2/6FeM+U+3QV9o0BH 7Phl0JGaZPgw== X-IronPort-AV: E=McAfee;i="6000,8403,9748"; a="140018631" X-IronPort-AV: E=Sophos;i="5.77,274,1596524400"; d="scan'208";a="140018631" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Sep 2020 12:23:28 -0700 IronPort-SDR: 3Le7cCVAVX57Y0hHX3kksP8bvj17/afe7vQiZKUqoVjY3ZT1BQaYzFI8FUTwrNpniBeL6KSxgt CdzjBrVgNCdg== X-IronPort-AV: E=Sophos;i="5.77,274,1596524400"; d="scan'208";a="484332739" Received: from yyu32-desk.sc.intel.com ([143.183.136.146]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Sep 2020 12:23:27 -0700 From: Yu-cheng Yu To: 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" , Vedvyas Shanbhogue , Dave Martin , Weijiang Yang Cc: Yu-cheng Yu Subject: [PATCH v12 1/8] x86/cet/ibt: Add Kconfig option for user-mode Indirect Branch Tracking Date: Fri, 18 Sep 2020 12:23:05 -0700 Message-Id: <20200918192312.25978-2-yu-cheng.yu@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200918192312.25978-1-yu-cheng.yu@intel.com> References: <20200918192312.25978-1-yu-cheng.yu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: Introduce Kconfig option X86_INTEL_BRANCH_TRACKING_USER. Indirect Branch Tracking (IBT) provides protection against CALL-/JMP- oriented programming attacks. It is active when the kernel has this feature enabled, and the processor and the application support it. When this feature is enabled, legacy non-IBT applications continue to work, but without IBT protection. Signed-off-by: Yu-cheng Yu --- v10: - Change build-time CET check to config depends on. arch/x86/Kconfig | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 6b6dad011763..b047e0a8d1c2 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1963,6 +1963,22 @@ config X86_INTEL_SHADOW_STACK_USER =20 If unsure, say y. =20 +config X86_INTEL_BRANCH_TRACKING_USER + prompt "Intel Indirect Branch Tracking for user-mode" + def_bool n + depends on CPU_SUP_INTEL && X86_64 + depends on $(cc-option,-fcf-protection) + select X86_INTEL_CET + help + Indirect Branch Tracking (IBT) provides protection against + CALL-/JMP-oriented programming attacks. It is active when + the kernel has this feature enabled, and the processor and + the application support it. When this feature is enabled, + legacy non-IBT applications continue to work, but without + IBT protection. + + If unsure, say y + config EFI bool "EFI runtime service support" depends on ACPI --=20 2.21.0