Re: [Xen-devel] How to get a domU's ctrl_if_evtchn number in xen0?

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

It's always port 1 in xenU. If you want the corresponding port in
xen0, issue a xc_evtchn_bind_interdomain:
 *pport1 = 0; /* wildcard */
 *pport2 = 1;
 xc_bind_interdomain(xch, DOMID_SELF, <domU>, pport1, pport2);
 /* *pport1 now contains local port */

 -- Keir

> The ctrl_if_evtchn seems to be maintained in Xend. Is there any way to
> write a code in xen0 get get the ctrl_if_evtchn of a specified xenU? We
> might need it to send notification of message sent over control channel
> from xen0 to xenU.
> 
> Thanks in advance for your help.
> 
> -x
> 
> 
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