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=-7.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 AB4ECC433DB for ; Fri, 19 Feb 2021 12:19:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A4E464EB8 for ; Fri, 19 Feb 2021 12:19:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230180AbhBSMT6 (ORCPT ); Fri, 19 Feb 2021 07:19:58 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:53212 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229524AbhBSMT4 (ORCPT ); Fri, 19 Feb 2021 07:19:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1613737109; h=from:from:reply-to: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=u7HT95kkWTHrCt+Iv/CYRhOhkzd75rYC+HIZYMaBL0w=; b=XRli+cy8a84OZv7lFiTrl1Nss2cL2f9hzBRUK/PbagRXIdURu5vc+IQCxiO7+9YIDvTthB cJxM4ilIvfhKXGJp+5vQdPvSIU2RssAGVdFyWCCDXf3Qwf01RaPHkPEDRH5b2Swf1sX94g NFCxU0qCzQiZH7o+df3/KE+kMMGfta8= 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-588-F-2IZ9plOnqioXOAJ81nqg-1; Fri, 19 Feb 2021 07:18:26 -0500 X-MC-Unique: F-2IZ9plOnqioXOAJ81nqg-1 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 5EA278030B7; Fri, 19 Feb 2021 12:18:23 +0000 (UTC) Received: from redhat.com (ovpn-113-184.ams2.redhat.com [10.36.113.184]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2547560BE5; Fri, 19 Feb 2021 12:18:11 +0000 (UTC) Date: Fri, 19 Feb 2021 12:18:09 +0000 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= Cc: qemu-devel@nongnu.org, Peter Maydell , Radoslaw Biernacki , kvm@vger.kernel.org, David Hildenbrand , Mark Cave-Ayland , Thomas Huth , "Edgar E. Iglesias" , Huacai Chen , Halil Pasic , Christian Borntraeger , =?utf-8?B?SGVydsOp?= Poussineau , Leif Lindholm , Aleksandar Rikalo , Eduardo Habkost , Alistair Francis , Richard Henderson , Greg Kurz , qemu-s390x@nongnu.org, qemu-arm@nongnu.org, David Gibson , Cornelia Huck , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , qemu-ppc@nongnu.org, Paolo Bonzini , Aurelien Jarno Subject: Re: [PATCH 0/7] hw/kvm: Exit gracefully when KVM is not supported Message-ID: Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= References: <20210219114428.1936109-1-philmd@redhat.com> <9540912b-1a81-1fd2-4710-2b81d5e69c5f@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <9540912b-1a81-1fd2-4710-2b81d5e69c5f@redhat.com> User-Agent: Mutt/2.0.5 (2021-01-21) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Fri, Feb 19, 2021 at 01:15:25PM +0100, Philippe Mathieu-Daudé wrote: > On 2/19/21 1:00 PM, Daniel P. Berrangé wrote: > > On Fri, Feb 19, 2021 at 12:44:21PM +0100, Philippe Mathieu-Daudé wrote: > >> Hi, > >> > >> This series aims to improve user experience by providing > >> a better error message when the user tries to enable KVM > >> on machines not supporting it. > > > > Improved error message is good, but it is better if the mgmt apps knows > > not to try this in the first place. > > I am not sure this is the same problem. This series addresses > users from the command line (without mgmt app). Users of mgmt apps can launch the same problematic raspbi + KVM config as people who don't use a mgmt app. > > IOW, I think we want "query-machines" to filter out machines > > which are not available with the currently configured accelerator. > > > > libvirt will probe separately with both TCG and KVM enabled, so if > > query-machines can give the right answer in these cases, libvirt > > will probably "just work" and not offer to even start such a VM. > > Yes, agreed. There are other discussions about 'query-machines' > and an eventual 'query-accels'. This series doesn't aim to fix > the mgmt app problems. I think this should be fixing query-machines right now. It shouldn't be much harder than a single if (...) test in the code. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|