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

[Gleb Natapov <gleb@xxxxxxxxxx>]

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.


>              qemu_irq_raise(s->irq);
>              s->cmos_data[RTC_REG_C] |= REG_C_IRQF;
>          }
> @@ -725,6 +729,7 @@ static Property mc146818rtc_properties[] = {
>      DEFINE_PROP_INT32("base_year", RTCState, base_year, 1980),
>      DEFINE_PROP_LOSTTICKPOLICY("lost_tick_policy", RTCState,
>                                 lost_tick_policy, LOST_TICK_DISCARD),
> +    DEFINE_PROP_UINT32("wakeup",   RTCState, wakeup,    1),
>      DEFINE_PROP_END_OF_LIST(),
>  };
>  
> -- 
> 1.7.1
> 
> 

--
                        Gleb.

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