Re: [PATCH v2 09/10] qom: Allow default values for instance properties

["Daniel P. Berrangé" <berrange@redhat.com>]

On Tue, Jun 09, 2026 at 01:25:13PM -0400, Peter Xu wrote:
> ObjectProperty allows default value settings via proper setup of
> prop->init() and prop->defval.  It currently is only supported in class
> properties, not instance properties.
> 
> However, since QOM allows class and instance properties, it should also
> allow instance to add properties during instance_init() and allow the
> default values to be applied properly for this instance only.
> 
> Add the logic.  It will be useful for all kinds of pointer based properties
> because pointers are normally not accessble in a class but only when an
> instance is available.  This will be able to achieve similar function as
> what qdev properties have (which works by remembering offsets within a
> structure instead).

Again, I don't think we should be adding more features to the
instance properties concept, as new code should use class
level properties.

> 
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  qom/object.c | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)

With regards,
Daniel
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