Re: [Qemu-devel] hw/arm: add Lego NXT board

[Paolo Bonzini]

Il 16/07/2014 10:40, Alexander Graf ha scritto:
> > >
>
> > I think that there are two other ways to do it.
>
> And what about the chardev way? Your silence in this regard is
> misterious ;-)

The main problem with chardevs is that they are completely asynchronous. 
 So they may not be a good match for your use case.

(In fact, this is a problem for the i2c-over-chardev and especially 
spi-over-chardev ideas I shot out yesterday.  For i2c-over-chardev one 
could add support to clock stretching in QEMU, but SPI is entirely 
synchronous).

Note that -qmp and -qtest both use chardevs internally to connect the 
external program with QEMU.

Paolo

> > 1) [...]
> > 2) [...]
>
> Thanks a lot for your suggestions. I will play a bit and come back when
> I have some code to show.