From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1fXn5z-0007WJ-AD for mharc-qemu-trivial@gnu.org; Tue, 26 Jun 2018 08:29:19 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45794) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fXn5x-0007UO-IC for qemu-trivial@nongnu.org; Tue, 26 Jun 2018 08:29:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fXn5w-0002Ii-RQ for qemu-trivial@nongnu.org; Tue, 26 Jun 2018 08:29:17 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47040) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fXn5s-0002Gw-LW; Tue, 26 Jun 2018 08:29:12 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CBCAD308213A; Tue, 26 Jun 2018 12:29:11 +0000 (UTC) Received: from localhost (ovpn-116-35.gru2.redhat.com [10.97.116.35]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8E3F11001642; Tue, 26 Jun 2018 12:29:09 +0000 (UTC) Date: Tue, 26 Jun 2018 09:29:08 -0300 From: Eduardo Habkost To: Paolo Bonzini Cc: Markus Armbruster , Thomas Huth , zhang.zhanghailiang@huawei.com, Ben Warren , qemu-trivial@nongnu.org, Cornelia Huck , qemu-devel@nongnu.org, Stefan Hajnoczi Message-ID: <20180626122908.GQ7451@localhost.localdomain> References: <20180622181108.GY7451@localhost.localdomain> <20180622193522.GI7451@localhost.localdomain> <743d495e-51cd-8c8e-293e-026b8dece74a@redhat.com> <87lgb3xsv8.fsf@dusky.pond.sub.org> <4292432f-5f26-6925-4c14-ad1370e36e5b@redhat.com> <20180625173056.GM7451@localhost.localdomain> <97504b42-9ebe-45c5-6ff3-b43102c8374a@redhat.com> <20180625195126.GN7451@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Fnord: you can see the fnord User-Agent: Mutt/1.9.2 (2017-12-15) X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Tue, 26 Jun 2018 12:29:11 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore X-BeenThere: qemu-trivial@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Jun 2018 12:29:18 -0000 On Tue, Jun 26, 2018 at 07:57:18AM +0200, Paolo Bonzini wrote: > On 25/06/2018 21:51, Eduardo Habkost wrote: > > In either case, I'm not arguing (yet) for changing the default > > upstream. I'm just arguing for upstream QEMU to not make any > > promises about the default. > > It would be a guest ABI breakage for TCG guests, so it would only apply > to new machine types. I don't think it's worth the complication. That's exactly the point: I want to stop promising a stable guest ABI when the accelerator is omitted, because I see no benefit in wasting energy on this. (I don't think we ever kept the guest ABI correctly with TCG, by the way.) > > BTW, another thing that needs documenting is ABI promises for HAX and > WHPX. [...] Absolutely. -- Eduardo