Re: [Qemu-devel] [RFC PATCH 1/3] target-i386: Add 486sx, old486, and old486sx CPU models

[Igor Mammedov <imammedo@redhat.com>]

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