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pseries: Export RTC time via QOM

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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: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
David Gibson 2015-02-06 14:55:53 +11:00 committed by Alexander Graf
parent 880ae7de59
commit 74e5ae284b
2 changed files with 10 additions and 0 deletions
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3
hw/ppc/spapr.c
View File

@ -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 */

7
hw/ppc/spapr_rtc.c
View File

@ -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 = {