Commit 74e5ae28 authored by David Gibson's avatar David Gibson Committed by Alexander Graf
Browse files

pseries: Export RTC time via QOM 



On x86, the guest's RTC can be read with QMP, either from the RTC device's
"date" property or via the "rtc-time" property on the machine (which is an
alias to the former).  This is set up in the mc146818rtc driver, and
doesn't work on other targets.

This patch adds a similar "date" property to the pseries machine's RTAS RTC
and adds a compatible alias to the machine.

Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 880ae7de

hw/ppc/spapr.c

+3 −0
Original line number Diff line number Diff line
@@ -1000,6 +1000,9 @@ static void spapr_rtc_create(sPAPREnvironment *spapr) 


    qdev_init_nofail(dev);

    spapr->rtc = dev;



    object_property_add_alias(qdev_get_machine(), "rtc-time",

                              OBJECT(spapr->rtc), "date", NULL);

}



/* Returns whether we want to use VGA or not */

hw/ppc/spapr_rtc.c

+7 −0
Original line number Diff line number Diff line
@@ -152,6 +152,11 @@ static void rtas_set_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr, 
    rtas_st(rets, 0, RTAS_OUT_SUCCESS);

}



static void spapr_rtc_qom_date(Object *obj, struct tm *current_tm, Error **errp)

{

    spapr_rtc_read(DEVICE(obj), current_tm, NULL);

}



static void spapr_rtc_realize(DeviceState *dev, Error **errp)

{

    sPAPRRTCState *rtc = SPAPR_RTC(dev);
@@ -165,6 +170,8 @@ static void spapr_rtc_realize(DeviceState *dev, Error **errp) 
    host_s = mktimegm(&tm);

    rtc_ns = qemu_clock_get_ns(rtc_clock);

    rtc->ns_offset = host_s * NSEC_PER_SEC - rtc_ns;



    object_property_add_tm(OBJECT(rtc), "date", spapr_rtc_qom_date, NULL);

}



static const VMStateDescription vmstate_spapr_rtc = {