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=-11.0 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 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 E4718C43460 for ; Wed, 28 Apr 2021 20:30:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AFBFF613F1 for ; Wed, 28 Apr 2021 20:30:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241966AbhD1UbA (ORCPT ); Wed, 28 Apr 2021 16:31:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57678 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241924AbhD1Ua7 (ORCPT ); Wed, 28 Apr 2021 16:30:59 -0400 Received: from mail-pj1-x1031.google.com (mail-pj1-x1031.google.com [IPv6:2607:f8b0:4864:20::1031]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2081C06138A for ; Wed, 28 Apr 2021 13:30:12 -0700 (PDT) Received: by mail-pj1-x1031.google.com with SMTP id k3-20020a17090ad083b0290155b934a295so3292902pju.2 for ; Wed, 28 Apr 2021 13:30:12 -0700 (PDT) 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=P+vKZ+ijBuTYKlW4ksMgx+Vfg6fzuznEGR/mj5GiueA=; b=cjFidoHrwQOs6nvggZcyJHPrqy+fC3lyB+khjXw8XuHUFFpmXhDbTFYt4Z0pcBKzIu +pYRKW5ncOZPFtP4kJPVLZD6RWZVY/45yIeJMmu7wv3lRl6oGjQUu/+MiO4G0VaeNB52 7LZlajzspTx8tLP+6aHqhBrlwyTRwrLFleo7s= 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=P+vKZ+ijBuTYKlW4ksMgx+Vfg6fzuznEGR/mj5GiueA=; b=ZG8CpX36GquqhBcA41R9llXEhdWPA9REI2owO5CdalPNAW+rxziRk1hUcyWG8o8jaS PDkHRN8fL1SsSLQZEQ4Xi7xKesfL8QxWa4gELFxrRxebRXzFK8rmUN5d1dJbGxKdPKcO 9YLvxlrxnTnooSJ/c2Sg/E43RbUEWNmfSZ7PHZeEBItxKeePb3EFtm3HkB+5z61Iymcm mNzZmC4Ddj2LimntRNjeIR8r5Fa+Wg9gWu+bwxe3d2lQDHzTVm5lJfcnq17U2a/fTUm/ 7KCwGJnT4nxOhB2ToPhURSFkSrAEvhV2+BIp9S5hR7+AbG6+pRr6P3tZ4qULp5EhNUd+ HwPQ== X-Gm-Message-State: AOAM530DxdUcsYo8TAVpLYRoYH2SisFCjVwxDBSZ3usR1k1K9Eefo56U rzIOvb662e+4itKfgLdoea4yVA== X-Google-Smtp-Source: ABdhPJyBQNS6Zhg9r+1Ydyw6DrEvZh5KvBBtP08tgx1YOKud2zKIe07WgXGa7qTG+VtPhaq9gdPUog== X-Received: by 2002:a17:902:8601:b029:e6:7b87:8add with SMTP id f1-20020a1709028601b02900e67b878addmr32266307plo.3.1619641812285; Wed, 28 Apr 2021 13:30:12 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id i20sm318571pjz.48.2021.04.28.13.30.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Apr 2021 13:30:11 -0700 (PDT) Date: Wed, 28 Apr 2021 13:30:10 -0700 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 , Haitao Huang Subject: Re: [PATCH v26 2/9] x86/cet/ibt: Add user-mode Indirect Branch Tracking support Message-ID: <202104281330.4269E2B@keescook> References: <20210427204720.25007-1-yu-cheng.yu@intel.com> <20210427204720.25007-3-yu-cheng.yu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210427204720.25007-3-yu-cheng.yu@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org On Tue, Apr 27, 2021 at 01:47:13PM -0700, Yu-cheng Yu wrote: > Introduce user-mode Indirect Branch Tracking (IBT) support. Add routines > for the setup/disable of IBT. > > Signed-off-by: Yu-cheng Yu Reviewed-by: Kees Cook -- Kees Cook