Re: [Qemu-devel] [PATCH 3/4] qdev: give all devices a canonical path

[Anthony Liguori <aliguori@us.ibm.com>]

On 03/27/2012 11:38 AM, Paolo Bonzini wrote:
> A strong limitation of QOM right now is that unconverted ports
> (e.g. all...) do not give a canonical path to devices that are
> part of the board.  This in turn makes it impossible to replace
> PROP_PTR with a QOM link for example.
>
> Signed-off-by: Paolo Bonzini<pbonzini@redhat.com>

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>

Regards,

Anthony Liguori

> ---
>   hw/qdev.c |   16 +++++++++++++---
>   1 files changed, 13 insertions(+), 3 deletions(-)
>
> diff --git a/hw/qdev.c b/hw/qdev.c
> index ee21d90..f5c716e 100644
> --- a/hw/qdev.c
> +++ b/hw/qdev.c
> @@ -113,14 +113,14 @@ DeviceState *qdev_create(BusState *bus, const char *name)
>       return dev;
>   }
>
> -DeviceState *qdev_try_create(BusState *bus, const char *name)
> +DeviceState *qdev_try_create(BusState *bus, const char *type)
>   {
>       DeviceState *dev;
>
> -    if (object_class_by_name(name) == NULL) {
> +    if (object_class_by_name(type) == NULL) {
>           return NULL;
>       }
> -    dev = DEVICE(object_new(name));
> +    dev = DEVICE(object_new(type));
>       if (!dev) {
>           return NULL;
>       }
> @@ -152,6 +152,16 @@ int qdev_init(DeviceState *dev)
>           qdev_free(dev);
>           return rc;
>       }
> +
> +    if (!OBJECT(dev)->parent) {
> +        static int unattached_count = 0;
> +        gchar *name = g_strdup_printf("device[%d]", unattached_count++);
> +
> +        object_property_add_child(container_get("/unattached"), name,
> +                                  OBJECT(dev), NULL);
> +        g_free(name);
> +    }
> +
>       if (qdev_get_vmsd(dev)) {
>           vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
>                                          dev->instance_id_alias,