Re: back/frontend drivers HelloWorld

[NAHieu <nahieu@gmail.com>]

On 9/23/05, Keir Fraser <Keir.Fraser@cl.cam.ac.uk> wrote:
>
> On 23 Sep 2005, at 10:53, NAHieu wrote:
>
> >> You bootstrap yourself via xenbus. You have a pre-agreed location in
> >> the xenstore hieararchy where the frontend driver writes key-value
> >> pairs containing the grant reference for the page containing the
> >> message rings, and an event channel for async notifications.
> >>
> >
> > I imagine that we can get rid of event channel, and use xenstore to
> > notify. That is certainly OK, but I doubt about its efficientcy. What
> > do you think?
>
> Very mad. It's easy to set up an inter-domain event channel betwene
> domains A and B:
>   1. A executes something like evtchn = EVTCHNOP_alloc_unbound(B)
>   2. A writes 'evtchn' into xenstore.
>   3. B reads 'evtchn' from xenstore
>   4. B executes something like EVTCHNOP_bind_interdomain(A,evtchn)

It seems I also need to use bind_evtchn_to_irq() to handle event sent
from event-channel?


Could you tell me which code in Xen uses the above 1->4 setup
procedure? I searched for some examples, but couldnt find any.


Great thanks,
Hieu