Re: [Xen-users] Serial port in domU

[Giovanni Bordello <g.bordello@xxxxxxxxx>]

On 7/28/05, Mark Williamson <mark.williamson@xxxxxxxxxxxx> wrote:
> > I don't use it for networking, but for text messaging - it talks to a
> > database and some other processes, i.e. I'd really like to avoid
> > having the userspace driver in dom0. Is that somehow possible? I only
> > know about dedicating whole PCI devices to domains but how about
> > giving them serial ports? Is that possible?
> 
> It's doable technically but might require a bit of hacking on Xen and the
> tools to make it work.
> 
> Otherwise the most straightforward way to deal with this would be to just
> share through dom0.

What do you mean "share through dom0"? A kind of forwarding of ttyS? 

Running the userspace controller in dom0 is a bit tricky because it
needs to talk to the database in domU (which is doable over TCP
connection indeed) and as well uses FIFO for talking to some other
daemon running in domU. That daemon shouldn't run in dom0 either
because the web interface talks to it as well. I hope I won't end up
running all this GSM beast, cron jobs and apache in dom0 just because
of the serial port...

How much work would it be to assign the port to domU?

Thanks

Giovanni

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