kernel/time/tick-broadcast.c

38 static void tick_broadcast_setup_oneshot(struct clock_event_device *bc, bool from_periodic);
40 static void tick_resume_broadcast_oneshot(struct clock_event_device *bc);
46 tick_broadcast_setup_oneshot(struct clock_event_device *bc, bool from_periodic) { BUG(); }
48 static inline void tick_resume_broadcast_oneshot(struct clock_event_device *bc) { }
77 static void tick_broadcast_start_periodic(struct clock_event_device *bc)
79 	if (bc)
80 		tick_setup_periodic(bc, 1);
249 	struct clock_event_device *bc = tick_broadcast_device.evtdev;
266 			tick_broadcast_start_periodic(bc);
268 			tick_broadcast_setup_oneshot(bc, false);
307 			if (cpumask_empty(tick_broadcast_mask) && bc)
308 				clockevents_shutdown(bc);
317 			if (bc && !(bc->features & CLOCK_EVT_FEAT_HRTIMER))
356 		struct clock_event_device *bc = tick_broadcast_device.evtdev;
371 		local = !(bc->features & CLOCK_EVT_FEAT_HRTIMER);
440 	struct clock_event_device *bc, *dev;
460 	bc = tick_broadcast_device.evtdev;
478 			if (bc && !(bc->features & CLOCK_EVT_FEAT_HRTIMER) &&
496 	if (bc) {
499 				clockevents_shutdown(bc);
502 				tick_broadcast_start_periodic(bc);
504 				tick_broadcast_setup_oneshot(bc, false);
526 	struct clock_event_device *bc = tick_broadcast_device.evtdev;
529 		if (bc && cpumask_empty(tick_broadcast_mask))
530 			clockevents_shutdown(bc);
551 	struct clock_event_device *bc;
556 	bc = tick_broadcast_device.evtdev;
557 	if (bc)
558 		clockevents_shutdown(bc);
581 	struct clock_event_device *bc;
586 	bc = tick_broadcast_device.evtdev;
588 	if (bc) {
589 		clockevents_tick_resume(bc);
594 				tick_broadcast_start_periodic(bc);
598 				tick_resume_broadcast_oneshot(bc);
638 static void tick_broadcast_set_affinity(struct clock_event_device *bc,
641 	if (!(bc->features & CLOCK_EVT_FEAT_DYNIRQ))
644 	if (cpumask_equal(bc->cpumask, cpumask))
647 	bc->cpumask = cpumask;
648 	irq_set_affinity(bc->irq, bc->cpumask);
651 static void tick_broadcast_set_event(struct clock_event_device *bc, int cpu,
654 	if (!clockevent_state_oneshot(bc))
655 		clockevents_switch_state(bc, CLOCK_EVT_STATE_ONESHOT);
657 	clockevents_program_event(bc, expires, 1);
658 	tick_broadcast_set_affinity(bc, cpumask_of(cpu));
661 static void tick_resume_broadcast_oneshot(struct clock_event_device *bc)
663 	clockevents_switch_state(bc, CLOCK_EVT_STATE_ONESHOT);
770 static int broadcast_needs_cpu(struct clock_event_device *bc, int cpu)
772 	if (!(bc->features & CLOCK_EVT_FEAT_HRTIMER))
774 	if (bc->next_event == KTIME_MAX)
776 	return bc->bound_on == cpu ? -EBUSY : 0;
779 static void broadcast_shutdown_local(struct clock_event_device *bc,
787 	if (bc->features & CLOCK_EVT_FEAT_HRTIMER) {
788 		if (broadcast_needs_cpu(bc, smp_processor_id()))
790 		if (dev->next_event < bc->next_event)
800 	struct clock_event_device *bc, *dev = td->evtdev;
805 	bc = tick_broadcast_device.evtdev;
815 		ret = broadcast_needs_cpu(bc, cpu);
825 			if (bc->features & CLOCK_EVT_FEAT_HRTIMER)
834 			broadcast_shutdown_local(bc, dev);
848 			} else if (dev->next_event < bc->next_event) {
849 				tick_broadcast_set_event(bc, cpu, dev->next_event);
857 				ret = broadcast_needs_cpu(bc, cpu);
1024 static void tick_broadcast_setup_oneshot(struct clock_event_device *bc,
1030 	if (!bc)
1039 	if (bc->event_handler == tick_handle_oneshot_broadcast) {
1063 	bc->event_handler = tick_handle_oneshot_broadcast;
1064 	bc->next_event = KTIME_MAX;
1097 		if (clockevent_state_oneshot(bc))
1118 		tick_broadcast_set_event(bc, cpu, nexttick);
1126 	struct clock_event_device *bc;
1134 	bc = tick_broadcast_device.evtdev;
1135 	if (bc)
1136 		tick_broadcast_setup_oneshot(bc, oldmode == TICKDEV_MODE_PERIODIC);
1144 	struct clock_event_device *bc;
1148 	bc = tick_broadcast_device.evtdev;
1150 	if (bc && broadcast_needs_cpu(bc, deadcpu)) {
1152 		clockevents_program_event(bc, bc->next_event, 1);
1188 	struct clock_event_device *bc = tick_broadcast_device.evtdev;
1190 	return bc ? bc->features & CLOCK_EVT_FEAT_ONESHOT : false;
1196 	struct clock_event_device *bc = tick_broadcast_device.evtdev;
1198 	if (!bc || (bc->features & CLOCK_EVT_FEAT_HRTIMER))