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 EAF22C433E0 for ; Sat, 20 Feb 2021 00:40:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B163564EDB for ; Sat, 20 Feb 2021 00:40:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229762AbhBTAkL (ORCPT ); Fri, 19 Feb 2021 19:40:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60850 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229658AbhBTAkJ (ORCPT ); Fri, 19 Feb 2021 19:40:09 -0500 Received: from mail.skyhub.de (mail.skyhub.de [IPv6:2a01:4f8:190:11c2::b:1457]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 59FA8C061574 for ; Fri, 19 Feb 2021 16:39:29 -0800 (PST) Received: from zn.tnic (p200300ec2f04670057cd3f2d2693719b.dip0.t-ipconnect.de [IPv6:2003:ec:2f04:6700:57cd:3f2d:2693:719b]) (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 838821EC041D; Sat, 20 Feb 2021 01:39:25 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1613781565; 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=xCS74TGIVlHffee6XsxWByYzoIpChbExKS5f7fUQKNw=; b=Y9T1ivVBGwboZFV4geMWD6qIP1Xope1oMQc47rw0DrBD00QPDju1hPGobArZEA2CD9O1y/ SbUnpHa2vgkpFni8tos9VjT38Q7dgv+zaKBGDhIHZBBCYuiwRpESv9NalJLDmWUUcIjQdw Xt8f77I6MIydcN3qnWREtbHImQByK/g= Date: Sat, 20 Feb 2021 01:39:20 +0100 From: Borislav Petkov To: Peter Zijlstra Cc: Josh Poimboeuf , x86@kernel.org, pjt@google.com, mbenes@suze.cz, jgross@suse.com, linux-kernel@vger.kernel.org Subject: Re: [RFC][PATCH 6/6] objtool,x86: Rewrite retpoline thunk calls Message-ID: <20210220003920.GG26778@zn.tnic> References: <20210219204300.749932493@infradead.org> <20210219210535.492733466@infradead.org> <20210219215530.ivzzv3oavhuip6un@treble> <20210219220158.GD59023@worktop.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210219220158.GD59023@worktop.programming.kicks-ass.net> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 19, 2021 at 11:01:58PM +0100, Peter Zijlstra wrote: > We could, but it so happens Joerg is also wanting negative features. Juergen. > So I was thikning that perhaps we can convince Boris they're not > really all that aweful after all :-) Well, I'm not crazy about this, TBH - I totally agree with Josh: "with objtool generating code, it's going to be a maze to figure out where the generated code is coming from" and without a real good reason to do this, what's the point? I know, because we can. :-) -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette