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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36FF4C4332F for ; Wed, 4 Jan 2023 13:28:29 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A2EB58E0002; Wed, 4 Jan 2023 08:28:28 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 9B7EC8E0001; Wed, 4 Jan 2023 08:28:28 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 858678E0002; Wed, 4 Jan 2023 08:28:28 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 71D7A8E0001 for ; Wed, 4 Jan 2023 08:28:28 -0500 (EST) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 3EBA2A0B6E for ; Wed, 4 Jan 2023 13:28:28 +0000 (UTC) X-FDA: 80317195896.17.8B01728 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by imf22.hostedemail.com (Postfix) with ESMTP id 7D443C0007 for ; Wed, 4 Jan 2023 13:28:26 +0000 (UTC) Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=alien8.de header.s=dkim header.b=sTRYQxNR; spf=pass (imf22.hostedemail.com: domain of bp@alien8.de designates 5.9.137.197 as permitted sender) smtp.mailfrom=bp@alien8.de; dmarc=pass (policy=none) header.from=alien8.de ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1672838906; a=rsa-sha256; cv=none; b=J3Dzvo9PFYE/LVb4aflEMvIXGTmiRcuOu2KzcGUJ0874JdMHKtZLzXsmqubziUKi7i/8+F a1se9zLL1jn863L0YUUGVdM2vSPP6qs49Qx48QJKNFeMvWe7lPuw+cNJFkf6l0nXVZZ4rG tVVDg7KUagUmZnsHDGRze9O6q9SjmMY= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=pass header.d=alien8.de header.s=dkim header.b=sTRYQxNR; spf=pass (imf22.hostedemail.com: domain of bp@alien8.de designates 5.9.137.197 as permitted sender) smtp.mailfrom=bp@alien8.de; dmarc=pass (policy=none) header.from=alien8.de ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1672838906; h=from:from:sender: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:dkim-signature; bh=M4exezlY2OdmtDJcZ7SGATML35Drmrf4DmtljZBELBU=; b=hmQ1SUIZEBX8lRt0jik6zANw/kx3s/9txeQn8T39Wdp3+fONNn0ueqESBAQ8J2B8ac0tjQ jsfdIcFSOxUeEX9ewND7Mle97hhZP02NewMaeAqtF0J812+MSisZdjfBFOjTOSxVV72iz6 qsKzPUC0uz21z03YUuZABTgl/wuP9yw= Received: from zn.tnic (p5de8e9fe.dip0.t-ipconnect.de [93.232.233.254]) (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 1FC031EC0645; Wed, 4 Jan 2023 14:28:25 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1672838905; 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=M4exezlY2OdmtDJcZ7SGATML35Drmrf4DmtljZBELBU=; b=sTRYQxNRv189O2ywiRO60YX0kSyCUJ9Vj278c1F7yfP2By4xyrdXZF9fFyj1sOwyHDhoqm Hc/aJjQgx6MqcB21Hyx1uESdoSd74I6zkZl8ekoR85ukW395B3KCbpx+QpHyxcWcc1qp02 H70uFzneKqgfy0fJnJi+Y6mpuUMLRLw= Date: Wed, 4 Jan 2023 14:28:24 +0100 From: Borislav Petkov To: "Edgecombe, Rick P" Cc: "akpm@linux-foundation.org" , "tglx@linutronix.de" , "linux-arch@vger.kernel.org" , "kcc@google.com" , "Lutomirski, Andy" , "nadav.amit@gmail.com" , "kirill.shutemov@linux.intel.com" , "Schimpe, Christina" , "peterz@infradead.org" , "corbet@lwn.net" , "linux-kernel@vger.kernel.org" , "jannh@google.com" , "dethoma@microsoft.com" , "x86@kernel.org" , "pavel@ucw.cz" , "rdunlap@infradead.org" , "linux-api@vger.kernel.org" , "john.allen@amd.com" , "arnd@arndb.de" , "jamorris@linux.microsoft.com" , "rppt@kernel.org" , "bsingharora@gmail.com" , "mike.kravetz@oracle.com" , "oleg@redhat.com" , "fweimer@redhat.com" , "keescook@chromium.org" , "gorcunov@gmail.com" , "Yu, Yu-cheng" , "andrew.cooper3@citrix.com" , "hpa@zytor.com" , "mingo@redhat.com" , "hjl.tools@gmail.com" , "linux-mm@kvack.org" , "Syromiatnikov, Eugene" , "Yang, Weijiang" , "linux-doc@vger.kernel.org" , "dave.hansen@linux.intel.com" , "Eranian, Stephane" Subject: Re: [PATCH v4 12/39] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW Message-ID: References: <20221203003606.6838-1-rick.p.edgecombe@intel.com> <20221203003606.6838-13-rick.p.edgecombe@intel.com> <6b4b96ec7a1cc53541f25c5a5ee8fa310b693ccc.camel@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <6b4b96ec7a1cc53541f25c5a5ee8fa310b693ccc.camel@intel.com> X-Rspam-User: X-Rspamd-Queue-Id: 7D443C0007 X-Rspamd-Server: rspam01 X-Stat-Signature: nsarp48mknnq91iif43uw36pwo8zft4c X-HE-Tag: 1672838906-370360 X-HE-Meta: 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 aoEoD/wi BZyvpTi7F8dDCk+g2cQQmk79qmVtoska3Yk6v 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 Tue, Dec 27, 2022 at 10:26:33PM +0000, Edgecombe, Rick P wrote: > Sure on "Shadow Stack". For Write=0,Dirty=1 there was a previous > suggestion to standardize on how these bits are referred to across the > series in both the comments and commit logs. I think the capitalization > helps differentiate between the concepts of write and dirty and the > actual PTE bits with those names. Especially since shadow stack muddies > the concepts of writable and dirty memory, I thought it was a helpful > distinction. Is it ok? Oh sorry, I meant only s/Shadow Stack/shadow stack/ The page flags are fine. Bottom line is: hw documents love to capitalize features and concepts and that's just unnecessary marketing bla. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette