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RE: [Xen-devel] virtual interrupt from one domain to another

from [Tian, Kevin]

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To:	"Agarwal, Lomesh" <lomesh.agarwal@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	RE: [Xen-devel] virtual interrupt from one domain to another
From:	"Tian, Kevin" <kevin.tian@xxxxxxxxx>
Date:	Mon, 22 Oct 2007 17:20:24 +0800
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Thread-topic:	[Xen-devel] virtual interrupt from one domain to another

>From: Agarwal,Lomesh
>Sent: 2007年10月22日 11:45
>
>Is there a way to send interrupt from one domain to another? I have
>FE/BE pair in different domains and I want to notify them using
>interrupt. how can I do that? is there a way which most of the FE/BE
>pair generally use?
>

Any reason that existing inter-vm event channel can't satisfy your FE/BE 
pair? On Xen PV 'processor', 'event port' is the basic async notification 
mechanism and even 'interrupt' (in native context) is carried by an event 
port. On Xen HVM 'processor', 'interrupt' is still the basic notification and 
all the 'event ports' are aggregated into one interrupt line derived from a 
dummy PCI device.

But when referring to FE/BE context, inter-vm event channel is always 
the way used by all existing FE/BE drivers.

Thanks,
Kevin

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