Re: [Qemu-devel] [SeaBIOS] [PATCH v2 3/4] i386: generate pc guest info

[Paolo Bonzini <pbonzini@redhat.com>]

Il 24/07/2013 17:09, Andreas Färber ha scritto:
> Hi,
> 
> Am 24.07.2013 17:04, schrieb Gerd Hoffmann:
>>>> /me suggests to check out qmp_qom_get() in qmp.c.  Some qom aequivalent
>>>> for qdev_find_recursive would be handy, dunno whenever such a thing
>>>> exists already, Andreas?
>>>
>>> Not sure what's needed here? object_resolve_path() and
>>> object_foreach_child() come to mind...
>>
>> object_resolve_path should do to (a) figure whenever we are i440fx or
>> q35 and (b) get the pcihost device (then read enable_s3 etc properties).
>>
>> For pvpanic (and maybe others) it might be handy to have "find me the
>> device of type TYPE_ISA_PVPANIC_DEVICE, anywhere in the tree"
>> functionality, so the same code works no matter where the isa bridge
>> happens to live.  Or "find me all pci bridges in the system".
> 
> I think Paolo used object_resolve_path_type("", TYPE_...) for that
> somewhere in audio code.

Yes.  It returns NULL if there is more than one device, but in some
cases it may be exactly what you want...

Paolo

>> Is object_foreach_child recursive?  Then it might do the job ...
> 
> No, recursion would need to be implemented in the callback - my recent
> recursive QOM realization series had an example of a deep search for
> devices.
> 
> Regards,
> Andreas
>