This patch adds two things. First it allows QEMU to distinguish between
regular powerdown and S4 powerdown. Later separate QMP notification will
be added for S4 powerdown. Second it allows S3/S4 states to be disabled
from QEMU command line. Some guests known to be broken with regards to
power management, but allow to use it anyway. Using new properties
management will be able to disable S3/S4 for such guests.

Supported system state are passed to a firmware using new fw_cfg file.
The file contains  6 byte array. Each byte represents one system
state. If byte at offset X has its MSB set it means that system state
X is supported and to enter it guest should use the value from lowest 3
bits.
Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

This patch switches pc s3 suspend over to the new infrastructure.
The cmos_s3 qemu_irq is killed, the new notifier is used instead.
The xen hack goes away with that too, the hypercall can simply be
done in a notifier function now.

This patch also makes the guest actually stay suspended instead
of leaving suspend instantly, so it is useful for more than just
testing whenever the suspend/resume cycle actually works.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Do APCIREGS->pm1.evt.en updates using the new acpi_pm1_evt_write_en
function, so the acpi code will see those updates.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Pretty pointless, can easily be reached via ACPIREGS now.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

All those acpi structs are not independent from each other.
Various acpi functions expecting multiple acpi structs passed
in are a clean indicator for that ;)

So this patch bundles all acpi structs in the new ACPIREGS
struct, then use it everythere pass around acpi state.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Group all structs at the top of hw/acpi.h.
Just moving around lines, no code changes.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

factor out ACPI GPE logic. Later it will be used by ICH9 ACPI.
Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

factor out ACPI PM1_CNT logic. This will be used by ich9 acpi.

Cc: Blue Swirl <blauwirbel@gmail.com>
Cc: Huacai Chen <zltjiangshi@gmail.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

factor out ACPI PM1a EVT logic.
Later this will be used by ich9 acpi.

Cc: Blue Swirl <blauwirbel@gmail.com>
Cc: Huacai Chen <zltjiangshi@gmail.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

factor out PM_TMR logic. Later This will be used by ich9 acpi.
Also fixes the same bug in vt82c686.c that was fixed by the following
commits.

> commit 055479fe
> Author: aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>
> Date:   Wed Jan 21 16:31:20 2009 +0000
>
>     Always return latest pmsts instead of the old one (Xiantao Zhang)
>
>     It may lead to the issue when booting windows guests with acpi=1
>     if return the old pmsts.
>
>     Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
>     Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Cc: Blue Swirl <blauwirbel@gmail.com>
Cc: Huacai Chen <zltjiangshi@gmail.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

See also 70539e18,
8167ee88,
530e7615 and
fad6cb1a.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

add acpi constants from linux header files and
replace the old constants with them.
The acpi constants will be used by other file.
Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp>
Acked-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>