From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:41334)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1Vb6qr-00088Q-5V
	for qemu-devel@nongnu.org; Tue, 29 Oct 2013 06:48:53 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1Vb6qi-0003kJ-N1
	for qemu-devel@nongnu.org; Tue, 29 Oct 2013 06:48:45 -0400
Received: from mail-qa0-x22e.google.com ([2607:f8b0:400d:c00::22e]:53610)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1Vb6qi-0003kF-Io
	for qemu-devel@nongnu.org; Tue, 29 Oct 2013 06:48:36 -0400
Received: by mail-qa0-f46.google.com with SMTP id j15so2779216qaq.19
	for <qemu-devel@nongnu.org>; Tue, 29 Oct 2013 03:48:36 -0700 (PDT)
Sender: Paolo Bonzini <paolo.bonzini@gmail.com>
Message-ID: <526F927D.1050901@redhat.com>
Date: Tue, 29 Oct 2013 11:48:29 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
MIME-Version: 1.0
References: <526F8457.5040907@kamp.de> <526F8701.2030906@redhat.com>
	<526F89B4.5080504@kamp.de> <526F8BCA.7090503@redhat.com>
	<526F909A.8000004@kamp.de>
In-Reply-To: <526F909A.8000004@kamp.de>
Content-Type: text/plain; charset=ISO-8859-15
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] Prohibit Windows from running in QEMU
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Peter Lieven <pl@kamp.de>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

Il 29/10/2013 11:40, Peter Lieven ha scritto:
>>>
>> The KVM signature should be at CPUID leaf 0x40000100.
> If I enable hyperv for all vServers the signature is at
> KVM_CPUID_SIGNATURE_NEXT (0x40000100) otherwise
> at KVM_CPUID_SIGNATURE (0x0).

KVM_CPU_ID_SIGNATURE is 0x40000000.

> Does this matter to Linux?

For recent versions it doesn't.  Older versions will not be able to use
kvmclock (and other PV enhancements for KVM such as steal time or PV EOI).

Paolo