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=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 517F9C17440 for ; Fri, 8 Nov 2019 22:59:23 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1B685214DB for ; Fri, 8 Nov 2019 22:59:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ZjSlU6iC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1B685214DB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:32826 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iTDDu-0005lb-8V for qemu-devel@archiver.kernel.org; Fri, 08 Nov 2019 17:59:22 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40923) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iTDCt-0004zb-Q9 for qemu-devel@nongnu.org; Fri, 08 Nov 2019 17:58:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iTDCr-00065S-SU for qemu-devel@nongnu.org; Fri, 08 Nov 2019 17:58:18 -0500 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:55875 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iTDCr-00065K-PU for qemu-devel@nongnu.org; Fri, 08 Nov 2019 17:58:17 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1573253897; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=u/DJ05jUqZGuG8XqVbeeR7hecFT0ihnRwbt4aF074N8=; b=ZjSlU6iCMPCqZG6zvIGrzwSZvpsHSnnttz03cl2R9J+yfg6pPaJHenustq15xERfxJYAMi 8he61dqVrGFbgiW/TanjeFT1JXOsS0Rzd87nq90VWgIdEpFSAo1FfVEPSWCSoTISf1eINT IR717jRA+617pxMDR6AQ1qrb9118zKg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-255-dCw8KMztMjCmYaLPg6T3xA-1; Fri, 08 Nov 2019 17:58:14 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id BFF08800C72; Fri, 8 Nov 2019 22:58:12 +0000 (UTC) Received: from [10.36.116.65] (ovpn-116-65.ams2.redhat.com [10.36.116.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9111860BE1; Fri, 8 Nov 2019 22:58:09 +0000 (UTC) Subject: Re: [PATCH v1 0/2] s390x/cpumodel: Introduce "best" model variants To: Eduardo Habkost , Peter Maydell References: <20191108110714.7475-1-david@redhat.com> <5dd613c0-6d9e-b943-b64d-7ba1791cbefe@redhat.com> <20191108191057.GZ3812@habkost.net> From: David Hildenbrand Organization: Red Hat GmbH Message-ID: <2ad063d7-7434-a55c-9994-a3d4d3622e0b@redhat.com> Date: Fri, 8 Nov 2019 23:58:08 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 MIME-Version: 1.0 In-Reply-To: <20191108191057.GZ3812@habkost.net> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-MC-Unique: dCw8KMztMjCmYaLPg6T3xA-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , =?UTF-8?Q?Daniel_P=2e_Berrang=c3=a9?= , Janosch Frank , Cornelia Huck , Richard Henderson , QEMU Developers , Markus Armbruster , Halil Pasic , Christian Borntraeger , qemu-s390x , Michael Mueller , Jiri Denemark Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 08.11.19 20:10, Eduardo Habkost wrote: > On Fri, Nov 08, 2019 at 01:02:28PM +0000, Peter Maydell wrote: >> On Fri, 8 Nov 2019 at 12:46, David Hildenbrand wrote: >>> There is a small but important difference between "max"/"host" and >>> "best". Max really means "all features", including deprecated ones. >>> "best", however, can disable experimental or deprecated features. Or an= y >>> other features we don't want to be enabled when somebody selects a mode= l >>> manually. >=20 > On x86, this is implemented by "host". "max" gives you the full > set of features that can be enabled by the user. "host" gives > you a reasonable set of features you will want to see enabled by > default when the user says "use the host CPU". Interesting. Maybe for s390x we might want to split host/max at one=20 time, too. E.g., exclude deprecated features from "host". Thanks for=20 that info. --=20 Thanks, David / dhildenb