[Qemu-devel] [PATCH 0/4] add ACPI Embedded Controller

[liguang]

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.