diff options
| author | Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> | 2014-11-07 13:31:33 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-11-13 16:13:28 +0100 |
| commit | 3ef0eab178e5120a0e1c079d163d5c71689d9b71 (patch) | |
| tree | 478e4973d18cd8a05f53a23b9f28b1f5bd6de98d /hw/acpi/core.c | |
| parent | f4ec5cd29d1f0d3a265039767399d2cf3e75950b (diff) | |
acpi: accurate overflow check
Compare clock in ns, because acpi_pm_tmr_update uses rounded
to ns value instead of ticks.
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
[This lets Windows boot in icount mode. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/acpi/core.c')
| -rw-r--r-- | hw/acpi/core.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/hw/acpi/core.c b/hw/acpi/core.c index a7368fb242..51913d6932 100644 --- a/hw/acpi/core.c +++ b/hw/acpi/core.c @@ -376,8 +376,11 @@ static void acpi_notify_wakeup(Notifier *notifier, void *data) /* ACPI PM1a EVT */ uint16_t acpi_pm1_evt_get_sts(ACPIREGS *ar) { - int64_t d = acpi_pm_tmr_get_clock(); - if (d >= ar->tmr.overflow_time) { + /* Compare ns-clock, not PM timer ticks, because + acpi_pm_tmr_update function uses ns for setting the timer. */ + int64_t d = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + if (d >= muldiv64(ar->tmr.overflow_time, + get_ticks_per_sec(), PM_TIMER_FREQUENCY)) { ar->pm1.evt.sts |= ACPI_BITMASK_TIMER_STATUS; } return ar->pm1.evt.sts; |