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qemu_timer.c: add timer_deadline_ms() helper 

The pSeries machine is using QEMUTimer internals to return the timeout
in seconds for a timer object, in hw/ppc/spapr.c, function
spapr_drc_unplug_timeout_remaining_sec().

Create a helper in qemu-timer.c to retrieve the deadline for a QEMUTimer
object, in ms, to avoid exposing timer internals to the PPC code.

CC: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20210301124133.23800-2-danielhb413@gmail.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Daniel Henrique Barboza 2021-03-01 09:41:33 -03:00 committed by David Gibson
parent e35dfbd227
commit 4515a5f786
3 changed files with 23 additions and 3 deletions
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5
hw/ppc/spapr_drc.c
View File

@ -421,9 +421,8 @@ void spapr_drc_unplug_request(SpaprDrc *drc)
int spapr_drc_unplug_timeout_remaining_sec(SpaprDrc *drc)
{
if (drc->unplug_requested && timer_pending(drc->unplug_timeout_timer)) {
return (qemu_timeout_ns_to_ms(drc->unplug_timeout_timer->expire_time) -
qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)) / 1000;
if (drc->unplug_requested) {
return timer_deadline_ms(drc->unplug_timeout_timer) / 1000;
}
return 0;

8
include/qemu/timer.h
View File

@ -795,6 +795,14 @@ static inline int64_t get_max_clock_jump(void)
return 60 * NANOSECONDS_PER_SECOND;
}
/**
* timer_deadline_ms:
*
* Returns the remaining miliseconds for @timer to expire, or zero
* if the timer is no longer pending.
*/
int64_t timer_deadline_ms(QEMUTimer *timer);
/*
* Low level clock functions
*/

13
util/qemu-timer.c
View File

@ -243,6 +243,19 @@ int64_t timerlist_deadline_ns(QEMUTimerList *timer_list)
return delta;
}
/*
* Returns the time remaining for the deadline, in ms.
*/
int64_t timer_deadline_ms(QEMUTimer *timer)
{
if (timer_pending(timer)) {
return qemu_timeout_ns_to_ms(timer->expire_time) -
qemu_clock_get_ms(timer->timer_list->clock->type);
}
return 0;
}
/* Calculate the soonest deadline across all timerlists attached
* to the clock. This is used for the icount timeout so we
* ignore whether or not the clock should be used in deadline