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RE: [Xen-devel] [PATCH 0/4] HVM Virtual S3

To: "Ke, Liping" <liping.ke@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] [PATCH 0/4] HVM Virtual S3
From: "Ian Pratt" <Ian.Pratt@xxxxxxxxxxxxx>
Date: Thu, 8 May 2008 16:11:30 +0100
Cc: "Tian, Kevin" <kevin.tian@xxxxxxxxx>, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>, Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, "Yu, Ke" <ke.yu@xxxxxxxxx>
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Thread-topic: [Xen-devel] [PATCH 0/4] HVM Virtual S3
> > Also, do you have plans to implement an "xm send-power-event" type
> > thing that enables us to inform the guest of actions such as lid
> > switch open/close, power cable in/out, power button pressed etc ?
> Since now host S3 and HVM S3 is not integrated yet, I am not sure
> whether those lid/cable/power button are appropriate to be involved
> with Guest notification. Especially if we have multiple guest. Yet I
think
> we must consider it carefully as part of VMM PM solution :)
> If both host and HVM is S3 done, when lid open,
> Xen is back, host is back and then HVM is back. It is a possible
> senario?

I don't think we need any integration with host S3 as part of the xend
-- that's a separate issue, maybe an example script that runs (early) as
part of a host S3 that puts the guests into S3 too.

I think what we need in xm/xend is a command for informing the guest of
ACPI events such as lid switch, power cable, power button etc.

Ian

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