[PATCH 0/4] Introduce a battery, AC adapter, and lid button

[Leonid Bloch]

This series introduces the following ACPI devices:

* Battery
* AC adapter
* Laptop lid button

When running QEMU on a laptop, these paravirtualized devices reflect the
state of these physical devices onto the guest. This functionality is
relevant not only for laptops, but also for any other device which has e.g.
a battery. This even allows to insert a ``fake'' battery to the
guest, in a form of a file which emulates the behavior of the actual
battery in sysfs. A possible use case for such a ``fake'' battery can be
limiting the budget of VM usage to a subscriber, in a naturally-visible way.
But of course, the main purpose here is addressing the desktop users.

This series was tested with Windows and (desktop) Linux guests, on which
indeed the battery icon appears in the corresponding state (full,
charging, discharging, time remaining to empty, etc.) and the AC adapter
plugging/unplugging behaves as expected. So is the laptop lid button.

For the ease of review, these commits are also available here:
https://github.com/blochl/qemu/pull/1/commits


Thanks,
Leonid.

Leonid Bloch (4):
  hw/acpi: Increase the number of possible ACPI interrupts
  hw/acpi: Introduce the QEMU Battery
  hw/acpi: Introduce the QEMU AC adapter
  hw/acpi: Introduce the QEMU lid button

 MAINTAINERS                          |  15 +
 docs/specs/acad.txt                  |  24 ++
 docs/specs/battery.txt               |  23 ++
 docs/specs/button.txt                |  35 ++
 hw/acpi/Kconfig                      |  12 +
 hw/acpi/acad.c                       | 318 +++++++++++++++++
 hw/acpi/battery.c                    | 512 +++++++++++++++++++++++++++
 hw/acpi/button.c                     | 327 +++++++++++++++++
 hw/acpi/core.c                       |  17 +-
 hw/acpi/meson.build                  |   3 +
 hw/acpi/trace-events                 |  15 +
 hw/i386/Kconfig                      |   3 +
 hw/i386/acpi-build.c                 | 178 ++++++++++
 include/hw/acpi/acad.h               |  37 ++
 include/hw/acpi/acpi_dev_interface.h |   3 +
 include/hw/acpi/battery.h            |  43 +++
 include/hw/acpi/button.h             |  35 ++
 17 files changed, 1598 insertions(+), 2 deletions(-)
 create mode 100644 docs/specs/acad.txt
 create mode 100644 docs/specs/battery.txt
 create mode 100644 docs/specs/button.txt
 create mode 100644 hw/acpi/acad.c
 create mode 100644 hw/acpi/battery.c
 create mode 100644 hw/acpi/button.c
 create mode 100644 include/hw/acpi/acad.h
 create mode 100644 include/hw/acpi/battery.h
 create mode 100644 include/hw/acpi/button.h

-- 
2.30.0