RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug

To:	"Liu, Jinsong" <jinsong.liu@xxxxxxxxx>
Subject:	RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug
From:	Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Date:	Fri, 20 Aug 2010 14:23:23 +0100
Cc:	"Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>, Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Li, Xin" <xin.li@xxxxxxxxx>
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Liu, Jinsong writes ("RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug"):
> ospm will do. Its sequence is (i.e. linux 2.6.32, ospm dispatch
> control method case)

"ospm" is "OS power management" ie in our case the guest kernel I take
it ?

> 1). clear pge_en x by writing '0' to the bit;
> 2). asynchronic call control method;
> 3). clear gpe_sts x by writing '1' to the bit;
> 4). re-enable gpe_en x by writing '1' to the bit;

So the code in qemu should never clear gpe_sts itself.

Ian.

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RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug