From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:43743)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <imammedo@redhat.com>) id 1W0Se6-0000hr-FP
	for qemu-devel@nongnu.org; Tue, 07 Jan 2014 04:08:26 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <imammedo@redhat.com>) id 1W0Se1-00025E-Oh
	for qemu-devel@nongnu.org; Tue, 07 Jan 2014 04:08:22 -0500
Received: from mx1.redhat.com ([209.132.183.28]:15024)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <imammedo@redhat.com>) id 1W0Se1-000254-F2
	for qemu-devel@nongnu.org; Tue, 07 Jan 2014 04:08:17 -0500
Date: Tue, 7 Jan 2014 10:08:10 +0100
From: Igor Mammedov <imammedo@redhat.com>
Message-ID: <20140107100810.2b361dae@thinkpad>
In-Reply-To: <52CB966E.6050600@zytor.com>
References: <1362017554-1260-1-git-send-email-hpa@zytor.com>
	<51501B58.1060300@suse.de>
	<20130325161515.06a2970b@nial.usersys.redhat.com>
	<51509B0E.40804@zytor.com>
	<20130325190537.GH8494@otherpad.lan.raisama.net>
	<5150B77B.7060207@zytor.com>
	<20130325205636.GK8494@otherpad.lan.raisama.net>
	<52CB966E.6050600@zytor.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] [RFC PATCH 1/3] target-i386: Add 486sx, old486,
 and old486sx CPU models
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: "H. Peter Anvin" <hpa@zytor.com>
Cc: Anthony Liguori <anthony@codemonkey.ws>, Orit Wasserman <owasserm@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>, Andreas =?ISO-8859-1?B?RuRyYmVy?= <afaerber@suse.de>, qemu-devel@nongnu.org

On Mon, 06 Jan 2014 21:53:50 -0800
"H. Peter Anvin" <hpa@zytor.com> wrote:

> On 03/25/2013 01:56 PM, Eduardo Habkost wrote:
> > 
> >>
> >> It needs to be possible to fix bugs....
> > 
> > It is possible to fix them today: just write a compat function or add a
> > global variable that is handled by cpu_x86_init(), and call it from the
> > pc-1.3 machine-type init function. See disable_kvm_pv_eoi() and
> > enable_compat_apic_id_mode(), for example.
> > 
> > The difference is that this will be much easier once we introduce the
> > static properties: then you just need to add the compat property values
> > to the compat_props field on the machine-type struct.
> > 
> 
> Hi guys,
> 
> Any movement on this in the past year?
currently, it's possible to use compat properties for fixing 'model' field,
see f8e6a11aecc9 "target-i386: Set model=6 on qemu64 & qemu32 CPU models"
as an example.

As for using compat properties for feature bits, we are getting closer to it,
there is a discussion on how to proceed with feature bits conversion that will
allow it. http://lists.nongnu.org/archive/html/qemu-devel/2013-12/msg02707.html

> 
> 	-hpa
> 
> 


-- 
Regards,
  Igor