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Re: [Xen-devel] DomU to Dom0 Communication in Xen HVM?

On Tue, Jul 17, 2012 at 11:22:28PM -0500, Larry White wrote:
> I am new to Xen and want to provide simple communication between my DomU and
> Dom0 environments.  I just need to be able to pass a few bytes of
> information back and forth between DomU and Dom0 while using some form of
> event management to know when an update occurs so I can act on it.  At
> first, it appeared that using XenBus and XenStore might be the right
> solution for this.  However, after looking over the documentation, it seems
> that XenBus and XenStore should only be used in a PVM Xen configuration, not
> a HVM model like mine.  Is this true?  

It can be done in HVM.
> What would be the best way to accomplish this?  Is there any sample code
> which demonstrates this for a HVM Xen environment?

libvchan is your best bet.
> Any information regarding this would be greatly apprecated.
> Larry

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