Xen devel - Feb 2011 - XEN event channel (interdomain communication)

Hi,

Could someone please briefly explain the differences between these calls in
the XEN event channel framework ?  I couldn''t find resources that talk
about
these calls..

My goal is simple: send an event from Dom0 to DomU and invoke a handler in
DomU when an event is received.   I wish to do this in kernel level.. I am a
bit confused on what calls to use and also about how to allocate port
numbers.  So it would be really helpful if someone could tell the purpose of
these calls..

bind_caller_port_to_irq
bind_listening_port_to_irq
bind_listening_port_to_irq
bind_interdomain_evtchn_to_irq


bind_caller_port_to_irqhandler
bind_listening_port_to_irqhandler
bind_listening_port_to_irqhandler
bind_interdomain_evtchn_to_irqhandler


Thanks!
Sankaran.


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>>> On 28.02.11 at 01:02, Sankaran Sivathanu
<ssankaran@gmail.com> wrote:
> Hi,
> 
> Could someone please briefly explain the differences between these calls in
> the XEN event channel framework ?  I couldn''t find resources that
talk about
> these calls..
> 
> My goal is simple: send an event from Dom0 to DomU and invoke a handler in
> DomU when an event is received.   I wish to do this in kernel level.. I am
a
> bit confused on what calls to use and also about how to allocate port
> numbers.  So it would be really helpful if someone could tell the purpose
of
> these calls..
> 
> bind_caller_port_to_irq
> bind_listening_port_to_irq
> bind_listening_port_to_irq
> bind_interdomain_evtchn_to_irq
These are internal helper functions for the below ones.
> bind_caller_port_to_irqhandler
You have an event channel (local to your domain) at hand and
want to use it within the kernel''s normal interrupt handling
infrastructure.
> bind_listening_port_to_irqhandler
> bind_listening_port_to_irqhandler
You want to obtain an event channel (bound into the kernel''s normal
interrupt handling infrastructure) that you can pass to a remote
domain for communication.
> bind_interdomain_evtchn_to_irqhandler
You were given an event channel from a remote domain to
communicate with it, and want to use it within the kernel''s normal
interrupt handling infrastructure.

Jan


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