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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 49CF0C4332F for ; Wed, 12 Oct 2022 16:54:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229604AbiJLQy1 (ORCPT ); Wed, 12 Oct 2022 12:54:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229774AbiJLQyZ (ORCPT ); Wed, 12 Oct 2022 12:54:25 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0EAB4E0729 for ; Wed, 12 Oct 2022 09:54:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1665593663; 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: in-reply-to:in-reply-to:references:references; bh=Qoy7AAHiT4kxg+sBg7GCQnX3x7hXvCR1aAfKGHjNP8Q=; b=Oi5OT8ORYsmsoDzmvUA7iI1CmiXRW85NgKV5mzt5HKhqDSI/q6RvvtpDndB0G1bl4u0hCd PSrmPPo1tpSdWBSG1Om3YRn8ZInzpMrNeKL9Y/Nfm7NFoa/dHNlw5xN/shrxSzJVJlsT97 BjAoTBrXUAEvOs9UGfGN/odO5rTBDGE= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-532-YWRLYSt9O42ciCepQ4HeNw-1; Wed, 12 Oct 2022 12:54:17 -0400 X-MC-Unique: YWRLYSt9O42ciCepQ4HeNw-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1A49E185A792; Wed, 12 Oct 2022 16:54:15 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.47]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8BB8640FF71C; Wed, 12 Oct 2022 16:54:07 +0000 (UTC) From: Florian Weimer To: Dave Hansen Cc: "Edgecombe, Rick P" , "bsingharora@gmail.com" , "hpa@zytor.com" , "Syromiatnikov, Eugene" , "peterz@infradead.org" , "rdunlap@infradead.org" , "keescook@chromium.org" , "Yu, Yu-cheng" , "dave.hansen@linux.intel.com" , "kirill.shutemov@linux.intel.com" , "Eranian, Stephane" , "linux-mm@kvack.org" , "nadav.amit@gmail.com" , "jannh@google.com" , "dethoma@microsoft.com" , "linux-arch@vger.kernel.org" , "kcc@google.com" , "bp@alien8.de" , "oleg@redhat.com" , "hjl.tools@gmail.com" , "Yang, Weijiang" , "Lutomirski, Andy" , "pavel@ucw.cz" , "arnd@arndb.de" , "Moreira, Joao" , "tglx@linutronix.de" , "mike.kravetz@oracle.com" , "x86@kernel.org" , "linux-doc@vger.kernel.org" , "jamorris@linux.microsoft.com" , "john.allen@amd.com" , "rppt@kernel.org" , "mingo@redhat.com" , "Shankar, Ravi V" , "corbet@lwn.net" , "linux-kernel@vger.kernel.org" , "linux-api@vger.kernel.org" , "gorcunov@gmail.com" Subject: Re: [PATCH v2 01/39] Documentation/x86: Add CET description References: <20220929222936.14584-1-rick.p.edgecombe@intel.com> <20220929222936.14584-2-rick.p.edgecombe@intel.com> <87ilkr27nv.fsf@oldenburg.str.redhat.com> <62481017bc02b35587dd520ed446a011641aa390.camel@intel.com> <87v8opz0me.fsf@oldenburg.str.redhat.com> Date: Wed, 12 Oct 2022 18:54:06 +0200 In-Reply-To: (Dave Hansen's message of "Wed, 12 Oct 2022 08:59:51 -0700") Message-ID: <87y1tlx9sh.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org * Dave Hansen: > On 10/12/22 05:29, Florian Weimer wrote: >>> What did you think of the proposal to disable existing binaries and >>> start from scratch? Elaborated in the coverletter in the section >>> "Compatibility of Existing Binaries/Enabling Interface". >> The ABI was finalized around four years ago, and we have shipped several >> Fedora and Red Hat Enterprise Linux versions with it. Other >> distributions did as well. It's a bit late to make changes now, and >> certainly not for such trivialities. > > Just to be clear: You're saying that a user/kernel ABI was "finalized" > by glibc shipping the user side of it, before there being an upstream > kernel implementation? Sorry for being unclear. I was refering to the x86-64 ELF psABI supplement for CET, not the kernel/userspace interface, which still does not exist in its final form as of today, as far as I understand it. Thanks, Florian