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=-11.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 3B97DC433DB for ; Thu, 4 Feb 2021 20:05:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F0D2864F45 for ; Thu, 4 Feb 2021 20:05:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239698AbhBDUEx (ORCPT ); Thu, 4 Feb 2021 15:04:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239884AbhBDT5z (ORCPT ); Thu, 4 Feb 2021 14:57:55 -0500 Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 96C69C0613D6 for ; Thu, 4 Feb 2021 11:57:14 -0800 (PST) Received: by mail-pj1-x102a.google.com with SMTP id s24so2313769pjp.5 for ; Thu, 04 Feb 2021 11:57:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=1mc7koCFdBCM4QqjJSOU9cMj9Z1hXBQ4lmWyrTn3L0c=; b=EnD8y5C9tnrx7mX24x0SzpWobewSUEg1SAdrluNCKUh12ljNCsVkirYqiShSKNlsKa xsRi+eb+jTferbjeWUAFTZcgQYeDzubETPjwMBp58Msk92q3Hys/Nc4CJaACBm3/rjRC GvNCjLeIsVfLb9UgxqgnuVtL8xuHQDzZ4nhmM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=1mc7koCFdBCM4QqjJSOU9cMj9Z1hXBQ4lmWyrTn3L0c=; b=rGB0PIYMHAX6LTpejQcPIYtYKFLHoYpnbYmgUexrvz0pIKe4KoLvyl2PmMBiXpw2RY 7yqlXVSprm5l0puf81d+GmW//hZoEbLPCEO68fNWwbCwCktXURf39bbVtsoqqqi0e8Cv ciDoJmo8LZOOk2eg6jyAwt0CdM1NgLctOJrT9KRV+Tovb7rACSlvo/bkal8FDOgEmVYY XJzcD1BfrcK6Sd6cQ3up8XKZdJ1rP4gdw7QWYbbZpsdg0ICH7hyaV1QFu0UaEimi+2TJ 3o0ewHOrPpZhuklE+6U88mDn6YidLwTfkb5pQxLFLSd5X1LmFXHU8ngilQhsLMzTFObu gjJQ== X-Gm-Message-State: AOAM533slzVnZcBYl9O/MhyteXOiXTcl3ZKcAuDho+h6tDfzrBvsw2eU c8PgrcMylilE5j2U7dw/sBIebg== X-Google-Smtp-Source: ABdhPJwtXiBuI/xhNFZbYjzoCMZ7QTIDZ72P2hHtcVx/bckk4z+4MIhXEnynF9XH7xe8pNQlO3pu3g== X-Received: by 2002:a17:902:82cb:b029:e1:2b0f:da57 with SMTP id u11-20020a17090282cbb02900e12b0fda57mr748892plz.33.1612468634241; Thu, 04 Feb 2021 11:57:14 -0800 (PST) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id o1sm7150366pgq.1.2021.02.04.11.57.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Feb 2021 11:57:13 -0800 (PST) Date: Thu, 4 Feb 2021 11:57:12 -0800 From: Kees Cook To: Yu-cheng Yu 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 , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue , Dave Martin , Weijiang Yang , Pengfei Xu Subject: Re: [PATCH v19 03/25] x86/cpufeatures: Add CET CPU feature flags for Control-flow Enforcement Technology (CET) Message-ID: <202102041157.05BDDAE1@keescook> References: <20210203225547.32221-1-yu-cheng.yu@intel.com> <20210203225547.32221-4-yu-cheng.yu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210203225547.32221-4-yu-cheng.yu@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 03, 2021 at 02:55:25PM -0800, Yu-cheng Yu wrote: > Add CPU feature flags for Control-flow Enforcement Technology (CET). > > CPUID.(EAX=7,ECX=0):ECX[bit 7] Shadow stack > CPUID.(EAX=7,ECX=0):EDX[bit 20] Indirect Branch Tracking > > Signed-off-by: Yu-cheng Yu Reviewed-by: Kees Cook -- Kees Cook