Re: [Qemu-devel] [RFC PATCH v1 2/4] bitops: Add UInt32StateInfo and helper functions

[Gerd Hoffmann]

  Hi,

>> For maximum flexibility, a callback could be specified but then we
>> overlap memory API.
> 
> I think this is a good idea, but continuing on the theme of what this
> API is trying to achieve I think there should be capability for
> per-bit function definitions. On the topic I think Gerd has played
> with the idea of per-register callbacks for some device models in the
> past.

hw/intel-hda.c is it.

Predates memory api though and thus doesn't integrated with it, although
it makes sense of course.  Could be as simple as a generic MemoryRegionOps.

I'm not sure it is that useful to have per-bit callbacks.  For "normal"
devices you rarely need that, and for gpio arrays probably want more
than just callbacks per bit (qemu_irqs for example).

cheers,
  Gerd