[Qemu-devel] [PATCH][RFC 0/14] implement power chip

[liguang]

By now, all devices of QEMU do not have much more
power management consideration, for example, if
system do suspend, it will call all registered notifiers,
this was loosely required, and the code to do power management
state transition seems just do 'ugly emulation', rather than be
conscious with whole system devices, same condition with reset(it
has been embedded in DeviceClass, good!),
shutdown, in real world, commonly all devices' power are controlled
by a power chip, then all power sequence can be done just
issue commands to this chip.
so, I come across an idea to implement qdev'ed power device, and
make all qdev struct of devices aware of self power management(add
on/off/wakeup/suspend ... filed for DeviceClass), this will
bring tidy power management, and the emulation will more like what
happened in real world.

Of course, it's only a patch-set for RFC, I'd like to ask all 
developers to help correct this idea, if it's worth to implement, 
I'll go head to refactor more.

Li Guang (14)
         gitignore: ignore more files
         qdev: add power management method
         qdev: remove redundant abort()
         qdev: add power on/off/suspend/wakeup handler
         power: add power chip emulation
         sysemu: remove PowerReason in sysemu.h
         acpi: refactor acpi wakeup function
         ich9: make lpc's reset also do pm_reset
         ich9: do lpc's power on by reset function
         piix4: refactor piix4's power callbacks
         pckbd: refactor pckbd's power callbacks
         ps2: call ps2_{kbd,mouse}_reset in kbd_reset
         parallel: refactor parallel_reset function
         uhci: refactor uhci's power callbacks

.gitignore              |   3 +++
Makefile.objs           |   1 +
hw/acpi.c               |  20 +++++++++-----------
hw/acpi.h               |   3 ++-
hw/acpi_ich9.c          |   4 ++--
hw/ich9.h               |   1 +
hw/lpc_ich9.c           |  12 ++++++++++-
hw/parallel.c           |  10 ++++++----
hw/pckbd.c              |  25 ++++++++++++----------
hw/piix4.c              |  14 ++++++++++++--
hw/ps2.c                |   8 ++++----
hw/ps2.h                |   2 ++
hw/qdev-core.h          |  15 ++++++
hw/qdev.c               |  99 +--
hw/usb/hcd-uhci.c       |  10 ++++++++++
include/sysemu/sysemu.h |   7 +------
power.c                 | 133 
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
power.h                 |  41 +++++++++++++++++
18 files changed, 365 insertions(+), 43 deletions(-)
 create mode 100644 power.c
 create mode 100644 power.h