Re: [Qemu-devel] [PATCHv3 2/4] pseries: Move CPU compatibility property to machine

[Andrea Bolognani]

On Thu, 2017-04-27 at 17:28 +1000, David Gibson wrote:
> @@ -2480,6 +2480,10 @@ static void spapr_machine_initfn(Object *obj)
>                                      " place of standard EPOW events when 
>possible"
>                                      " (required for memory hot-unplug 
>support)",
>                                      NULL);
> +
> +    object_property_add(obj, "max-cpu-compat", "str",
> +                        ppc_compat_prop_get, ppc_compat_prop_set,
> +                        NULL, &spapr->max_compat_pvr, &error_fatal);

I'm not familiar with QEMU's object system, but shouldn't
you be using object_property_add_str() instead? It looks
like you're doing more than the straightforward wrapper
would do, so maybe that's just not possible.


In any case, all other string properties look like

  pseries-2.10.kvm-type=string

whereas this one ends up looking like

  pseries-2.10.max-cpu-compat=str

which I think should be fixed - object_property_add_str()
passes "string" instead of "str" to object_property_add().

You should also add a sensible description for the property,
preferably spelling out all the accepted values.


Speaking of properties...

  $ qemu-system-ppc64 -cpu host,compat=whatever
  Segmentation fault

You might want to look into that ;)

-- 
Andrea Bolognani / Red Hat / Virtualization