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=-2.1 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, USER_AGENT_MUTT 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 4B136C5CFEB for ; Wed, 11 Jul 2018 09:36:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 03B4C2083B for ; Wed, 11 Jul 2018 09:36:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="b7wGQq1Z" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 03B4C2083B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732523AbeGKJkG (ORCPT ); Wed, 11 Jul 2018 05:40:06 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:43578 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726368AbeGKJkF (ORCPT ); Wed, 11 Jul 2018 05:40:05 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=iQ8l/LF++fo69Ns9n3OkAsjhcdxyOv6jW4Rsh/+HxJc=; b=b7wGQq1ZeF+48VUa2uPdkjBrf QuWgM5Cnq2+lfZaVDnZH2fV/gC7wLnS5ipddx3+uRgV/EKmIB//EOmOtFVZtGUNwJ8xmovH6Hsrf2 jilSlgcU1HJz+xqz9QiGDYMbkDQUcATAEDKNdQxu3Xuq1sO8Epq0xoOWyLJAx6Qx7gOmzR2Z1+PWm UiZkbjXMs7Z1QFsr7/zQtaWtE24kbucHI1jvU9fJnjCWIp7stvBZm0/fD4VKFyTvfNSLcYXTG7p9d 6CzTne5DESszo7Wdzo1+8ahy86Y8mi7Y4zsgITncyB0yJL9OOs4DlOqVNPeJeOxwQx9BU6qmwtuv9 C4rWf0Wkw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fdBXz-0002Wd-GY; Wed, 11 Jul 2018 09:36:31 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 053BE20291063; Wed, 11 Jul 2018 11:36:30 +0200 (CEST) Date: Wed, 11 Jul 2018 11:36:29 +0200 From: Peter Zijlstra 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 , Cyrill Gorcunov , Dave Hansen , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , "Ravi V. Shankar" , Vedvyas Shanbhogue Subject: Re: [RFC PATCH v2 17/27] x86/cet/shstk: User-mode shadow stack support Message-ID: <20180711093629.GY2476@hirez.programming.kicks-ass.net> References: <20180710222639.8241-1-yu-cheng.yu@intel.com> <20180710222639.8241-18-yu-cheng.yu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180710222639.8241-18-yu-cheng.yu@intel.com> User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 10, 2018 at 03:26:29PM -0700, Yu-cheng Yu wrote: > +struct cet_status { > + unsigned long shstk_base; > + unsigned long shstk_size; > + unsigned int shstk_enabled:1; > +}; > @@ -498,6 +499,10 @@ struct thread_struct { > unsigned int sig_on_uaccess_err:1; > unsigned int uaccess_err:1; /* uaccess failed */ > > +#ifdef CONFIG_X86_INTEL_CET > + struct cet_status cet; > +#endif > + > /* Floating point and extended processor state */ > struct fpu fpu; > /* Why does that need a structure? That avoids folding the bitfields.