Hi; this is a question which came up in Damien's reset series which I don't know the answer to:
What is the interaction of the QOM device lifecycle (instance_init/realize/ unrealize/instance_finalize) with hotplug and hot-unplug ? I couldn't find any documentation of this but maybe I was looking in the wrong place... Looking at device_set_realized() it seems like we treat "realize" as meaning "and also do the hot-plug if this is a device we're trying to hotplug". On the other hand hot-unplug is I think the other way around: when we get a hot-unplug event we assume that it should also imply an "unrealize" (but just unrealizing doesn't auto-hot-unplug) ? Once a device is hot-unplugged (and thus unrealized) is it valid for it to be re-hot-plugged, or is the assumption that it's then destroyed and a fresh device is created if the user wants to plug something in again later ? Put another way, is it valid for a qdev device to see state transitions realize -> unrealize -> realize ? thanks -- PMM
