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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 5B96BC433B4 for ; Tue, 11 May 2021 17:19:32 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D6B4361261 for ; Tue, 11 May 2021 17:19:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D6B4361261 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=alien8.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2A6696B006E; Tue, 11 May 2021 13:19:31 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 27D206B0070; Tue, 11 May 2021 13:19:31 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 144D96B0072; Tue, 11 May 2021 13:19:31 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0099.hostedemail.com [216.40.44.99]) by kanga.kvack.org (Postfix) with ESMTP id EED826B006E for ; Tue, 11 May 2021 13:19:30 -0400 (EDT) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id A045A181AF5EA for ; Tue, 11 May 2021 17:19:30 +0000 (UTC) X-FDA: 78129611700.02.0014066 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by imf08.hostedemail.com (Postfix) with ESMTP id 6D24480192F3 for ; Tue, 11 May 2021 17:19:00 +0000 (UTC) Received: from zn.tnic (p200300ec2f0ec70020ab858661d7f414.dip0.t-ipconnect.de [IPv6:2003:ec:2f0e:c700:20ab:8586:61d7:f414]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 134C61EC02E6; Tue, 11 May 2021 19:09:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1620752985; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=oXj+aT1NLTLdq4xvPpDkmK4mlSpKcyX1kXRzqY9sy/I=; b=bLcn8++CHPCwI1r2+fGHgbqQmPMj0/Kw1DAyubBcNj+IKE9PD5aHN82t0EOQYgw9zkmX8U VMpPrqq8dwdNUvdWd3XkPDW+VrSH9QT2L5Yp2JzKL44ITn0WeVVb2mlJjcR4IxfCdcZh0e tVqiaLj/s+Svo/KGRT6NwRVyr9HxLRg= Date: Tue, 11 May 2021 19:09:41 +0200 From: Borislav Petkov To: "Yu, Yu-cheng" 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 , 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 , Pengfei Xu , Haitao Huang Subject: Re: [PATCH v26 23/30] x86/cet/shstk: Handle thread shadow stack Message-ID: References: <20210427204315.24153-1-yu-cheng.yu@intel.com> <20210427204315.24153-24-yu-cheng.yu@intel.com> <89598d32-4bf8-b989-ee77-5b4b55a138a9@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <89598d32-4bf8-b989-ee77-5b4b55a138a9@intel.com> X-Rspamd-Queue-Id: 6D24480192F3 Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=alien8.de header.s=dkim header.b=bLcn8++C; dmarc=pass (policy=none) header.from=alien8.de; spf=pass (imf08.hostedemail.com: domain of bp@alien8.de designates 5.9.137.197 as permitted sender) smtp.mailfrom=bp@alien8.de X-Rspamd-Server: rspam03 X-Stat-Signature: e3wo5mmi3n6z8jjhrxrcxcdtbq1exbkp Received-SPF: none (alien8.de>: No applicable sender policy available) receiver=imf08; identity=mailfrom; envelope-from=""; helo=mail.skyhub.de; client-ip=5.9.137.197 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1620753540-351293 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: On Mon, May 10, 2021 at 03:57:56PM -0700, Yu, Yu-cheng wrote: > So this struct will be: > > struct thread_shstk { > u64 shstk_base; > u64 shstk_size; > u64 locked:1; > u64 ibt:1; > }; > > Ok? Pretty much. You can even remove the "shstk_" from the members and when you call the pointer "shstk", accessing the members will read shstk->base shstk->size ... and all is organic and readable :) Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette