Re: [Xen-devel] [Qemu-devel] [PATCH v3 6/6] suspend: make rtc alarm wakeup the guest.

[Gerd Hoffmann <kraxel@xxxxxxxxxx>]

On 02/09/12 09:56, Gleb Natapov wrote:
> On Wed, Feb 08, 2012 at 12:00:19PM +0100, Gerd Hoffmann wrote:
>> Add a 'wakeup' property to the mc146818rtc.  It is on by default.
>> When enabled the rtc will wake up the guest when the alarm fires.
>>
>> Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
>> ---
>>  hw/mc146818rtc.c |    5 +++++
>>  1 files changed, 5 insertions(+), 0 deletions(-)
>>
>> diff --git a/hw/mc146818rtc.c b/hw/mc146818rtc.c
>> index 314ed52..3b912c6 100644
>> --- a/hw/mc146818rtc.c
>> +++ b/hw/mc146818rtc.c
>> @@ -86,6 +86,7 @@ typedef struct RTCState {
>>      uint8_t cmos_index;
>>      struct tm current_tm;
>>      int32_t base_year;
>> +    uint32_t wakeup;
>>      qemu_irq irq;
>>      qemu_irq sqw_irq;
>>      int it_shift;
>> @@ -437,6 +438,9 @@ 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) {
>> +            if (s->wakeup) {
>> +                qemu_system_wakeup_request();
>> +            }
> RTC should do wakeup only if RTC_EN bit is set pm1en.

--verbose please.  Which register, which bit?  There is no RTC_EN in
hw/mc146818rtc.* ...

Is this enable bit specifically for wakeup from suspend?

thanks,
  Gerd


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