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 02DBBC433E0 for ; Thu, 4 Feb 2021 20:18:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A1FDB64E0A for ; Thu, 4 Feb 2021 20:18:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237699AbhBDTyA (ORCPT ); Thu, 4 Feb 2021 14:54:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238280AbhBDTvf (ORCPT ); Thu, 4 Feb 2021 14:51:35 -0500 Received: from mail-pl1-x636.google.com (mail-pl1-x636.google.com [IPv6:2607:f8b0:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6563EC061793 for ; Thu, 4 Feb 2021 11:50:06 -0800 (PST) Received: by mail-pl1-x636.google.com with SMTP id d13so2340828plg.0 for ; Thu, 04 Feb 2021 11:50:06 -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=iBLMSCpzZcV26JDbm3Tk5TNwyOXOFPL+xJ3FCBgJOmc=; b=KyXxS/2xKJybcjPjmedT7sMpt9sCUlQgZi1EhPWosNSp79EUf68HPjqOdC8eSZP+6T 79C8OvKn7CzmZWMokBs2i0HnigmaZ9loo+T7R5/Li0/H5ESiyaQDa7J6saI4f2qoPOZe FbJkQSX9K2yoM/hr85Q6/ePU+9uqQU8vk/iwk= 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=iBLMSCpzZcV26JDbm3Tk5TNwyOXOFPL+xJ3FCBgJOmc=; b=fptNxwNUWI0ndPQEOY3GJ+3P4MWI1A+zBTFAJ17YTDOe3kQv1jXhLbiBal2bTwBaIN BqBErupZ/iyHPcw/1wIn74p0nPu7M8LYkh0QqBz7p7DtglYycj6VPBe++mnWwl9GcR4f HYuiilFyRJribiS/hMMDIjfV475TrfqhBBVfbwaqec8G3I4VBM9wy77e1oVw8e6r+fW8 Ep2aQcgwEl/kyKaV9uzYBzrXRkQx+T19h/Na2H5XIhiMnb+3ORpw23ojRfzX+nl9fDZA owExseqw6knNwbZyDWyBTzVn2xCqLskUDPob+DtfBwRhuUR4tEewbStwP/H45LlZLYex tUlQ== X-Gm-Message-State: AOAM532D+xpEPpjPtb4SEP30T8iq2xQXk/bm976LeLj+G3LKbi539GZN x49CS+GslXvnWnQTOQFMA+8Zeg== X-Google-Smtp-Source: ABdhPJxua1tNWSGKQMHDctfR/EJ5HVJZgKa0i2RmDdeE+oFlQXkcMFPwElJCu+Wj04jC5RzqPm8IZQ== X-Received: by 2002:a17:90a:71c1:: with SMTP id m1mr592331pjs.48.1612468205972; Thu, 04 Feb 2021 11:50:05 -0800 (PST) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id o4sm6029930pjs.57.2021.02.04.11.50.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Feb 2021 11:50:05 -0800 (PST) Date: Thu, 4 Feb 2021 11:50:03 -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 2/7] x86/cet/ibt: User-mode Indirect Branch Tracking support Message-ID: <202102041150.1390D8B9@keescook> References: <20210203225902.479-1-yu-cheng.yu@intel.com> <20210203225902.479-3-yu-cheng.yu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210203225902.479-3-yu-cheng.yu@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org On Wed, Feb 03, 2021 at 02:58:57PM -0800, 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