From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44241) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d6Xw3-0003kx-Ps for qemu-devel@nongnu.org; Fri, 05 May 2017 03:45:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d6Xw0-0000by-Pn for qemu-devel@nongnu.org; Fri, 05 May 2017 03:45:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38116) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d6Xw0-0000bq-J2 for qemu-devel@nongnu.org; Fri, 05 May 2017 03:45:52 -0400 References: <20170504145658.5506-1-berrange@redhat.com> <20170504184241.GB3482@thinpad.lan.raisama.net> From: Paolo Bonzini Message-ID: <5014609b-b009-5919-185c-abb96b030c97@redhat.com> Date: Fri, 5 May 2017 09:45:48 +0200 MIME-Version: 1.0 In-Reply-To: <20170504184241.GB3482@thinpad.lan.raisama.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH RFC] i386: expose "TCGTCGTCGTCG" in the 0x40000000 CPUID leaf List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Eduardo Habkost , "Daniel P. Berrange" Cc: qemu-devel@nongnu.org, Richard Henderson , "Richard W.M. Jones" On 04/05/2017 20:42, Eduardo Habkost wrote: > >> NB2, for KVM, we added a flag for '-cpu kvm=off' to let you >> hide the KVMKVMKVM signature from guests. Presumably we should >> add a 'tcg=off' flag for the same reason ? > I don't like "kvm=off" because it sounds like it disables KVM > completely. "tcg=off" would be misleading as well. > > What about a generic "hypervisor-cpuid=off" property? Yeah, it should also disable the CPUID_EXT_HYPERVISOR feature, in fact. Paolo