Re: [RFC 1/4] memory: add memory_region_init_io_with_dev interface

[Gerd Hoffmann]

On Wed, Sep 09, 2020 at 10:15:47AM +0800, Jason Wang wrote:
> 
> On 2020/9/9 上午12:41, Li Qiang wrote:
> > Currently the MR is not explicitly connecting with its device instead of
> > a opaque. In most situation this opaque is the deivce but it is not an
> > enforcement. This patch adds a DeviceState member of to MemoryRegion
> > we will use it in later patch.
> 
> 
> I don't have a deep investigation. But I wonder whether we could make sure
> of owner instead of adding a new field here.

Should be possible.  There is object_dynamic_cast() which can be used to
figure whenever a given owner object is a device.

take care,
  Gerd