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suspend: make rtc alarm wakeup the guest.

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Make the rtc wake up the guest when the alarm fires.
Add acpi windup to property support RTC_EN, so guests
can enable and disable this.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2012-02-23 13:45:24 +01:00 committed by Anthony Liguori
parent 9826fd597d
commit 62aeb0f765
3 changed files with 9 additions and 0 deletions
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7
hw/acpi.c
View File

@ -254,6 +254,10 @@ static void acpi_notify_wakeup(Notifier *notifier, void *data)
WakeupReason *reason = data;
switch (*reason) {
case QEMU_WAKEUP_REASON_RTC:
ar->pm1.evt.sts |=
(ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_RT_CLOCK_STATUS);
break;
case QEMU_WAKEUP_REASON_OTHER:
default:
/* ACPI_BITMASK_WAKE_STATUS should be set on resume.
@ -287,6 +291,8 @@ void acpi_pm1_evt_write_sts(ACPIREGS *ar, uint16_t val)
void acpi_pm1_evt_write_en(ACPIREGS *ar, uint16_t val)
{
ar->pm1.evt.en = val;
qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC,
val & ACPI_BITMASK_RT_CLOCK_ENABLE);
}
void acpi_pm1_evt_power_down(ACPIREGS *ar)
@ -301,6 +307,7 @@ void acpi_pm1_evt_reset(ACPIREGS *ar)
{
ar->pm1.evt.sts = 0;
ar->pm1.evt.en = 0;
qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, 0);
}
/* ACPI PM_TMR */

1
hw/mc146818rtc.c
View File

@ -437,6 +437,7 @@ static void rtc_update_second2(void *opaque)
s->cmos_data[RTC_REG_C] |= REG_C_AF;
if (s->cmos_data[RTC_REG_B] & REG_B_AIE) {
qemu_system_wakeup_request(QEMU_WAKEUP_REASON_RTC);
qemu_irq_raise(s->irq);
s->cmos_data[RTC_REG_C] |= REG_C_IRQF;
}

1
sysemu.h
View File

@ -40,6 +40,7 @@ void vm_stop_force_state(RunState state);
typedef enum WakeupReason {
QEMU_WAKEUP_REASON_OTHER = 0,
QEMU_WAKEUP_REASON_RTC,
} WakeupReason;
void qemu_system_reset_request(void);