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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E188CC369CB for ; Sat, 26 Apr 2025 18:56:19 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.969320.1358477 (Exim 4.92) (envelope-from ) id 1u8kh3-0003tV-5u; Sat, 26 Apr 2025 18:56:05 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 969320.1358477; Sat, 26 Apr 2025 18:56:05 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1u8kh3-0003tO-3D; Sat, 26 Apr 2025 18:56:05 +0000 Received: by outflank-mailman (input) for mailman id 969320; Sat, 26 Apr 2025 18:56:03 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1u8kh1-0003tI-GL for xen-devel@lists.xenproject.org; Sat, 26 Apr 2025 18:56:03 +0000 Received: from tor.source.kernel.org (tor.source.kernel.org [2600:3c04:e001:324:0:1991:8:25]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 167fe96f-22d0-11f0-9ffb-bf95429c2676; Sat, 26 Apr 2025 20:55:58 +0200 (CEST) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id A4B2C6115D; Sat, 26 Apr 2025 18:55:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AAC84C4CEE2; Sat, 26 Apr 2025 18:55:52 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 167fe96f-22d0-11f0-9ffb-bf95429c2676 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745693756; bh=F0vG+nDcCONKZs4e6RtOitQ9n8Mz1fjCVmRW/ho89E4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=C+3VZhA2rqQfpKTKP2m4yO0DolUCdMwEmkMYv15ph8vW2QWnr+dwsgrdPEDAa+XKU cT+lBTivJUJbXq+YwDynrxuVGxxd7bxMoEAer2TcpR5Z/80KWu1DFGnJTMAWfaqwHp Wt4Jx4tgNhuiLnQ6Uh2yFQ/qvjnnEMx6H4ogxz68sX4Wr+dcBgU5QN/U2h2Uj0/Z1G PhGfSzqlUafQ7G0XaImHK804liJwS1k4ojK4L0zZghvVKYBfY33rV6LPviVBGb4Iu6 DYFyY1v4Quv3vP2Oe2ssiS64YmX/cVrSFbo0ye/YxMwYHLtMptqvYcMDxuiFBr260w jjSeafo4hNDdA== Date: Sat, 26 Apr 2025 20:55:50 +0200 From: Ingo Molnar To: "H. Peter Anvin" Cc: Arnd Bergmann , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Arnd Bergmann , Juergen Gross , Boris Ostrovsky , Alexander Usyskin , Greg Kroah-Hartman , Mateusz =?utf-8?Q?Jo=C5=84czyk?= , "Mike Rapoport (Microsoft)" , Ard Biesheuvel , Peter Zijlstra , linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, Linus Torvalds Subject: Re: [PATCH] [RFC] x86/cpu: rework instruction set selection Message-ID: References: <20250425141740.734030-1-arnd@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: * H. Peter Anvin wrote: > Dropping CMOV would mean dropping P5 support. Yeah, I think we should make the cutoff at the 686 level. Is there any strong reason not to do that? Stable kernels will still exist for a very long time for ancient boards. Ingo