Re: [PATCH 1/2] hw/i386/x86: Attach CPUs to machine

[Yang Zhong <yang.zhong@intel.com>]

On Mon, Jan 17, 2022 at 01:48:46PM +0000, Daniel P. Berrangé wrote:
> On Mon, Jan 17, 2022 at 12:53:30AM +0100, Philippe Mathieu-Daudé via wrote:
> > Avoid having CPUs objects dangling as unattached QOM ones,
> > directly attach them to the machine.
> 
> Lets be more explicit here
> 
> [quote]
>   Previously CPUs were exposed in the QOM tree at a path
> 
>     /machine/unattached/device[nn]
> 
>   where the 'nn' of the first CPU is usually zero, but can
>   vary depending on what devices were already created.
> 
>   With this change the CPUs are now at
> 
>     /machine/cpu[nn]
> 
>   where the 'nn' of the first CPU is always zero
> [/quote]
> 
> to  /machine/unattached/device[0->$SMP-COUNT]
> 
> > 
> > Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> > ---
> >  hw/i386/x86.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/hw/i386/x86.c b/hw/i386/x86.c
> > index b84840a1bb9..50bf249c700 100644
> > --- a/hw/i386/x86.c
> > +++ b/hw/i386/x86.c
> > @@ -108,6 +108,7 @@ void x86_cpu_new(X86MachineState *x86ms, int64_t apic_id, Error **errp)
> >  {
> >      Object *cpu = object_new(MACHINE(x86ms)->cpu_type);
> >  
> > +    object_property_add_child(OBJECT(x86ms), "cpu[*]", OBJECT(cpu));
> >      if (!object_property_set_uint(cpu, "apic-id", apic_id, errp)) {
> >          goto out;
> >      }
> > -- 
> > 2.34.1
> > 
> > 


  Thanks Philippe, if we change /machine/unattached/device[nn] to /machine/cpu[nn],
  the related changes should also be done in the Libvirt side, which still check
  /machine/unattached/device[0] to get unvailable-features. thanks!

  Yang

> 
> Regards,
> Daniel
> -- 
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