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Date: Fri, 24 May 2013 14:45:29 +0300
From: "Michael S. Tsirkin" <mst@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 0/4] add ACPI Embedded Controller
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To: liguang <lig.fnst@cn.fujitsu.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, Stefan Berger <stefanb@linux.vnet.ibm.com>, qemu-devel@nongnu.org, Bruce Rogers <brogers@suse.com>, Joel Schopp <jschopp@linux.vnet.ibm.com>, Gerd Hoffmann <kraxel@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Andreas =?iso-8859-1?Q?F=E4rber?= <afaerber@suse.de>, Isaku Yamahata <yamahata@valinux.co.jp>

On Wed, May 22, 2013 at 11:46:33AM +0800, liguang wrote:
> These patches try to add ACPI Embedded Controller (EC),
> refer-to:
> ACPI SPEC v5 chapter 5 
> "ACPI Embedded Controller Interface Specification"
> 
> EC is a standard ACPI device, it plays flexible roles,
> e.g. 
> power controller, it can control power sequence for
> platform to enter or leave system state(0,1,3,4,5),
> it can controller CPU fan by the temperature of sensor.
> event carrier, it can pass events between platform
> and OS, so OS can execute _Qxx method which defined
> by yourself.
> 
> So, I want to deliver CPU online/offline event between
> OS and QEMU for CPU hotplug feature, then we will don't
> need to "echo 1 > /sys/devices/system/cpu/cpu1/online"
> again after 'cpu-add'.
> 
> patches for online/offline event handler of QEUM and 
> linux kernel are writing, and will send once finished.
> 
> since EC is a common device, so I send pathes separately.

Do any non-linux guests support this device?

-- 
MST