From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Np0XC-000711-Bj for qemu-devel@nongnu.org; Tue, 09 Mar 2010 09:35:48 -0500 Received: from [199.232.76.173] (port=44126 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Np0Wx-0006mN-Eq for qemu-devel@nongnu.org; Tue, 09 Mar 2010 09:35:31 -0500 Received: from Debian-exim by monty-python.gnu.org with spam-scanned (Exim 4.60) (envelope-from ) id 1Np0IE-0006Cp-Kz for qemu-devel@nongnu.org; Tue, 09 Mar 2010 09:20:20 -0500 Received: from mail-ew0-f214.google.com ([209.85.219.214]:56282) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1Np0ID-0006CE-K4 for qemu-devel@nongnu.org; Tue, 09 Mar 2010 09:20:18 -0500 Received: by ewy6 with SMTP id 6so4162845ewy.17 for ; Tue, 09 Mar 2010 06:20:15 -0800 (PST) Message-ID: <4B965919.1050404@codemonkey.ws> Date: Tue, 09 Mar 2010 08:20:09 -0600 From: Anthony Liguori MIME-Version: 1.0 Subject: Re: [Qemu-devel] [PATCH] QMP: Introduce RTC_CHANGE event References: <20100225121144.10d30251@redhat.com> In-Reply-To: <20100225121144.10d30251@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Luiz Capitulino Cc: qemu-devel@nongnu.org On 02/25/2010 09:11 AM, Luiz Capitulino wrote: > Emitted whenever the RTC time changes. > > Signed-off-by: Luiz Capitulino > Not that this change isn't acceptable, but I think we need to improve how we handle these events in the future. > --- > QMP/qmp-events.txt | 15 +++++++++++++++ > hw/mc146818rtc.c | 2 ++ > monitor.c | 3 +++ > monitor.h | 1 + > sysemu.h | 2 ++ > vl.c | 9 +++++++++ > 6 files changed, 32 insertions(+), 0 deletions(-) > > diff --git a/QMP/qmp-events.txt b/QMP/qmp-events.txt > index b0183f9..f64b42d 100644 > --- a/QMP/qmp-events.txt > +++ b/QMP/qmp-events.txt > @@ -38,6 +38,21 @@ Example: > { "event": "RESET", > "timestamp": { "seconds": 1267041653, "microseconds": 9518 } } > > +RTC_CHANGE > +---------- > + > +Emitted when the RTC time changes. > + > +Data: > + > +- "offset": delta against the host UTC in seconds (json-number) > + > +Example: > + > +{ "event": "RTC_CHANGE", > + "data": { "offset": 78 }, > + "timestamp": { "seconds": 1267020223, "microseconds": 435656 } } > + > SHUTDOWN > -------- > > diff --git a/hw/mc146818rtc.c b/hw/mc146818rtc.c > index 2616d0d..a537855 100644 > --- a/hw/mc146818rtc.c > +++ b/hw/mc146818rtc.c > @@ -297,6 +297,8 @@ static void rtc_set_time(RTCState *s) > tm->tm_mday = rtc_from_bcd(s, s->cmos_data[RTC_DAY_OF_MONTH]); > tm->tm_mon = rtc_from_bcd(s, s->cmos_data[RTC_MONTH]) - 1; > tm->tm_year = rtc_from_bcd(s, s->cmos_data[RTC_YEAR]) + s->base_year - 1900; > + > + rtc_change_mon_event(tm); > } > > static void rtc_copy_date(RTCState *s) > diff --git a/monitor.c b/monitor.c > index b2f5842..20512da 100644 > --- a/monitor.c > +++ b/monitor.c > @@ -423,6 +423,9 @@ void monitor_protocol_event(MonitorEvent event, QObject *data) > case QEVENT_BLOCK_IO_ERROR: > event_name = "BLOCK_IO_ERROR"; > break; > + case QEVENT_RTC_CHANGE: > + event_name = "RTC_CHANGE"; > + break; > default: > abort(); > break; > diff --git a/monitor.h b/monitor.h > index 8cc21f5..aa51bd5 100644 > --- a/monitor.h > +++ b/monitor.h > @@ -23,6 +23,7 @@ typedef enum MonitorEvent { > QEVENT_VNC_INITIALIZED, > QEVENT_VNC_DISCONNECTED, > QEVENT_BLOCK_IO_ERROR, > + QEVENT_RTC_CHANGE, > QEVENT_MAX, > } MonitorEvent; > This is going against the direction that we're trying to take with qdev. We're trying to modularize devices by having only the device themselves know their existence. That's the beauty of things like -device. The fact that we're putting knowledge of the RTC into monitor.[ch] and vl.c is a step in the wrong direction. We really ought to be able to generate device specific events entirely within the device. Regards, Anthony Liguori > diff --git a/sysemu.h b/sysemu.h > index 8ba618e..b5587f4 100644 > --- a/sysemu.h > +++ b/sysemu.h > @@ -252,6 +252,8 @@ void do_usb_add(Monitor *mon, const QDict *qdict); > void do_usb_del(Monitor *mon, const QDict *qdict); > void usb_info(Monitor *mon); > > +void rtc_change_mon_event(struct tm *tm); > + > void register_devices(void); > > #endif > diff --git a/vl.c b/vl.c > index 3f580f5..6c05c93 100644 > --- a/vl.c > +++ b/vl.c > @@ -1488,6 +1488,15 @@ int qemu_timedate_diff(struct tm *tm) > return seconds - time(NULL); > } > > +void rtc_change_mon_event(struct tm *tm) > +{ > + QObject *data; > + > + data = qobject_from_jsonf("{ 'offset': %d }", qemu_timedate_diff(tm)); > + monitor_protocol_event(QEVENT_RTC_CHANGE, data); > + qobject_decref(data); > +} > + > static void configure_rtc_date_offset(const char *startdate, int legacy) > { > time_t rtc_start_date; >