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Date: Mon, 25 Mar 2013 13:56:41 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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Subject: Re: [Qemu-devel] [RFC PATCH 1/3] target-i386: Add 486sx, old486,
 and old486sx CPU models
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To: Eduardo Habkost <ehabkost@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>, Orit Wasserman <owasserm@redhat.com>, =?UTF-8?B?QW5kcmVhcyBGw6RyYmVy?= <afaerber@suse.de>, Anthony Liguori <anthony@codemonkey.ws>, qemu-devel@nongnu.org

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.
> 

It sounds like this is underway, and since the priority for the 486 bit
is very low it is better for that bit to just wait.

	-hpa