Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752376AbbBTTnO (ORCPT ); Fri, 20 Feb 2015 14:43:14 -0500 Received: from e06smtp10.uk.ibm.com ([195.75.94.106]:47033 "EHLO e06smtp10.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752165AbbBTTnM (ORCPT ); Fri, 20 Feb 2015 14:43:12 -0500 Date: Fri, 20 Feb 2015 20:43:03 +0100 From: Michael Mueller To: Alexander Graf Cc: "qemu-devel@nongnu.org" , "kvm@vger.kernel.org" , "linux-s390@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Gleb Natapov , Christian Borntraeger , "Jason J. Herne" , Cornelia Huck , Paolo Bonzini , Andreas Faerber , Richard Henderson Subject: Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models Message-ID: <20150220204303.4f20f54e@bee> In-Reply-To: <2049D8E0-FE03-4E84-94D0-E23B695BC865@suse.de> References: <1424183053-4310-1-git-send-email-mimu@linux.vnet.ibm.com> <1424183053-4310-5-git-send-email-mimu@linux.vnet.ibm.com> <54E73C8F.7000202@suse.de> <20150220160046.4743acc8@bee> <89E3550E-9E2B-4D95-A809-B7C64EBCD7C5@suse.de> <20150220164944.4eb4eeb3@bee> <54E76790.1030700@suse.de> <20150220183748.45b32e11@bee> <2049D8E0-FE03-4E84-94D0-E23B695BC865@suse.de> Organization: IBM X-Mailer: Claws Mail 3.9.3 (GTK+ 2.24.23; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15022019-0041-0000-0000-0000035255D7 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1752 Lines: 58 On Fri, 20 Feb 2015 18:50:20 +0100 Alexander Graf wrote: > > > > > Am 20.02.2015 um 18:37 schrieb Michael Mueller : > > > > On Fri, 20 Feb 2015 17:57:52 +0100 > > Alexander Graf wrote: > > > >> Because all CPUs we have in our list only expose 128 bits? > > > > Here a STFLE result on a EC12 GA2, already more than 128 bits... Is that model on the list? > > If that model has 3 elements, yes, the array should span 3. > > I hope it's in the list. Every model wecare about should be, no? > On my list? Yes! > > > > [mimu@p57lp59 s390xfac]$ ./s390xfac -b > > fac[0] = 0xfbfffffbfcfff840 > > fac[1] = 0xffde000000000000 > > fac[2] = 0x1800000000000000 > >> > >>> I want to have this independent from a future machine of the z/Arch. The kernel stores the > >>> full facility set, KVM does and there is no good reason for QEMU not to do. If other > >>> accelerators decide to just implement 64 or 128 bits of facilities that's ok... > >> > >> So you want to support CPUs that are not part of the list? > > > > The architecture at least defines more than 2 or 3. Do you want me to limit it to an arbitrary > > size?. Only in QEMU or also in the KVM interface? > > Only internally in QEMU. The kvm interface should definitely be as big as the spec allows! Right, now we're on the same page again. That can be taken in consideration. ... Although it's just and optimization. :-) Michael > > Alex > > > > > Thanks > > Michael > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/