Lines Matching +full:next +full:- +full:mode
1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright(C) 2005-2006, Thomas Gleixner <tglx@linutronix.de>
4 * Copyright(C) 2005-2007, Red Hat, Inc., Ingo Molnar
5 * Copyright(C) 2006-2007 Timesys Corp., Thomas Gleixner
7 * High-resolution kernel timers
9 * In contrast to the low-resolution timeout API, aka timer wheel,
50 #include "tick-internal.h"
54 * cpu_base->active
57 #define HRTIMER_ACTIVE_HARD ((1U << MASK_SHIFT) - 1)
125 return likely(base->online); in hrtimer_base_is_online()
137 * timer->base->cpu_base
151 * means that all timers which are tied to this base via timer->base are
158 * possible to set timer->base = &migration_base and drop the lock: the timer
164 __acquires(&timer->base->lock) in lock_hrtimer_base()
169 base = READ_ONCE(timer->base); in lock_hrtimer_base()
171 raw_spin_lock_irqsave(&base->cpu_base->lock, *flags); in lock_hrtimer_base()
172 if (likely(base == timer->base)) in lock_hrtimer_base()
175 raw_spin_unlock_irqrestore(&base->cpu_base->lock, *flags); in lock_hrtimer_base()
182 * Check if the elected target is suitable considering its next
185 * If the elected target is remote and its next event is after the timer
193 * Called with cpu_base->lock of target cpu held.
210 * next remote target event is after this timer. Keep the in hrtimer_suitable_target()
217 expires = ktime_sub(hrtimer_get_expires(timer), new_base->offset); in hrtimer_suitable_target()
219 return expires >= new_base->cpu_base->expires_next; in hrtimer_suitable_target()
238 * We switch the timer base to a power-optimized selected CPU target,
240 * - NO_HZ_COMMON is enabled
241 * - timer migration is enabled
242 * - the timer callback is not running
243 * - the timer is not the first expiring timer on the new target
255 int basenum = base->index; in switch_hrtimer_base()
260 new_base = &new_cpu_base->clock_base[basenum]; in switch_hrtimer_base()
276 WRITE_ONCE(timer->base, &migration_base); in switch_hrtimer_base()
277 raw_spin_unlock(&base->cpu_base->lock); in switch_hrtimer_base()
278 raw_spin_lock(&new_base->cpu_base->lock); in switch_hrtimer_base()
282 raw_spin_unlock(&new_base->cpu_base->lock); in switch_hrtimer_base()
283 raw_spin_lock(&base->cpu_base->lock); in switch_hrtimer_base()
285 WRITE_ONCE(timer->base, base); in switch_hrtimer_base()
288 WRITE_ONCE(timer->base, new_base); in switch_hrtimer_base()
302 __acquires(&timer->base->cpu_base->lock) in lock_hrtimer_base()
304 struct hrtimer_clock_base *base = timer->base; in lock_hrtimer_base()
306 raw_spin_lock_irqsave(&base->cpu_base->lock, *flags); in lock_hrtimer_base()
330 tmp = dclc < 0 ? -dclc : dclc; in __ktime_divns()
339 return dclc < 0 ? -tmp : tmp; in __ktime_divns()
374 * - an active object is initialized
392 * - an active object is activated
393 * - an unknown non-static object is activated
408 * - an active object is freed
443 enum hrtimer_mode mode) in debug_hrtimer_activate() argument
464 enum hrtimer_mode mode) { } in debug_hrtimer_activate() argument
468 static inline void debug_setup(struct hrtimer *timer, clockid_t clockid, enum hrtimer_mode mode) in debug_setup() argument
471 trace_hrtimer_setup(timer, clockid, mode); in debug_setup()
475 enum hrtimer_mode mode) in debug_setup_on_stack() argument
478 trace_hrtimer_setup(timer, clockid, mode); in debug_setup_on_stack()
482 enum hrtimer_mode mode) in debug_activate() argument
484 debug_hrtimer_activate(timer, mode); in debug_activate()
485 trace_hrtimer_start(timer, mode); in debug_activate()
505 return &cpu_base->clock_base[idx]; in __next_base()
520 struct timerqueue_node *next; in __hrtimer_next_event_base() local
523 next = timerqueue_getnext(&base->active); in __hrtimer_next_event_base()
524 timer = container_of(next, struct hrtimer, node); in __hrtimer_next_event_base()
526 /* Get to the next timer in the queue. */ in __hrtimer_next_event_base()
527 next = timerqueue_iterate_next(next); in __hrtimer_next_event_base()
528 if (!next) in __hrtimer_next_event_base()
531 timer = container_of(next, struct hrtimer, node); in __hrtimer_next_event_base()
533 expires = ktime_sub(hrtimer_get_expires(timer), base->offset); in __hrtimer_next_event_base()
541 if (timer->is_soft) in __hrtimer_next_event_base()
542 cpu_base->softirq_next_timer = timer; in __hrtimer_next_event_base()
544 cpu_base->next_timer = timer; in __hrtimer_next_event_base()
548 * clock_was_set() might have changed base->offset of any of in __hrtimer_next_event_base()
566 * hrtimer_run_softirq(), hrtimer_update_softirq_timer() will re-add these bases.
573 * - HRTIMER_ACTIVE_ALL,
574 * - HRTIMER_ACTIVE_SOFT, or
575 * - HRTIMER_ACTIVE_HARD.
584 if (!cpu_base->softirq_activated && (active_mask & HRTIMER_ACTIVE_SOFT)) { in __hrtimer_get_next_event()
585 active = cpu_base->active_bases & HRTIMER_ACTIVE_SOFT; in __hrtimer_get_next_event()
586 cpu_base->softirq_next_timer = NULL; in __hrtimer_get_next_event()
590 next_timer = cpu_base->softirq_next_timer; in __hrtimer_get_next_event()
594 active = cpu_base->active_bases & HRTIMER_ACTIVE_HARD; in __hrtimer_get_next_event()
595 cpu_base->next_timer = next_timer; in __hrtimer_get_next_event()
612 if (!cpu_base->softirq_activated) { in hrtimer_update_next_event()
618 cpu_base->softirq_expires_next = soft; in hrtimer_update_next_event()
623 * If a softirq timer is expiring first, update cpu_base->next_timer in hrtimer_update_next_event()
627 cpu_base->next_timer = cpu_base->softirq_next_timer; in hrtimer_update_next_event()
636 ktime_t *offs_real = &base->clock_base[HRTIMER_BASE_REALTIME].offset; in hrtimer_update_base()
637 ktime_t *offs_boot = &base->clock_base[HRTIMER_BASE_BOOTTIME].offset; in hrtimer_update_base()
638 ktime_t *offs_tai = &base->clock_base[HRTIMER_BASE_TAI].offset; in hrtimer_update_base()
640 ktime_t now = ktime_get_update_offsets_now(&base->clock_was_set_seq, in hrtimer_update_base()
643 base->clock_base[HRTIMER_BASE_REALTIME_SOFT].offset = *offs_real; in hrtimer_update_base()
644 base->clock_base[HRTIMER_BASE_BOOTTIME_SOFT].offset = *offs_boot; in hrtimer_update_base()
645 base->clock_base[HRTIMER_BASE_TAI_SOFT].offset = *offs_tai; in hrtimer_update_base()
651 * Is the high resolution mode active ?
656 cpu_base->hres_active : 0; in hrtimer_hres_active()
663 cpu_base->expires_next = expires_next; in __hrtimer_reprogram()
682 if (!hrtimer_hres_active(cpu_base) || cpu_base->hang_detected) in __hrtimer_reprogram()
690 * next event
691 * Called with interrupts disabled and base->lock held
700 if (skip_equal && expires_next == cpu_base->expires_next) in hrtimer_force_reprogram()
703 __hrtimer_reprogram(cpu_base, cpu_base->next_timer, expires_next); in hrtimer_force_reprogram()
717 * Enable / Disable high resolution mode
727 * hrtimer_high_res_enabled - query, if the highres mode is enabled
735 * Switch to high resolution mode
742 pr_warn("Could not switch to high resolution mode on CPU %u\n", in hrtimer_switch_to_hres()
743 base->cpu); in hrtimer_switch_to_hres()
746 base->hres_active = 1; in hrtimer_switch_to_hres()
761 * Retrigger next event is called after clock was set with interrupts
766 * - CONFIG_HIGH_RES_TIMERS is enabled.
767 * - CONFIG_NOHZ_COMMON is enabled
778 * When high resolution mode or nohz is active, then the offsets of in retrigger_next_event()
780 * next tick will take care of that. in retrigger_next_event()
782 * If high resolution mode is active then the next expiring timer in retrigger_next_event()
787 * of the next expiring timer is enough. The return from the SMP in retrigger_next_event()
794 raw_spin_lock(&base->lock); in retrigger_next_event()
800 raw_spin_unlock(&base->lock); in retrigger_next_event()
808 * Called with interrupts disabled and base->cpu_base.lock held
813 struct hrtimer_clock_base *base = timer->base; in hrtimer_reprogram()
814 ktime_t expires = ktime_sub(hrtimer_get_expires(timer), base->offset); in hrtimer_reprogram()
820 * expiry time which is less than base->offset. Set it to 0. in hrtimer_reprogram()
825 if (timer->is_soft) { in hrtimer_reprogram()
830 * first hard hrtimer on the remote CPU - in hrtimer_reprogram()
833 struct hrtimer_cpu_base *timer_cpu_base = base->cpu_base; in hrtimer_reprogram()
835 if (timer_cpu_base->softirq_activated) in hrtimer_reprogram()
838 if (!ktime_before(expires, timer_cpu_base->softirq_expires_next)) in hrtimer_reprogram()
841 timer_cpu_base->softirq_next_timer = timer; in hrtimer_reprogram()
842 timer_cpu_base->softirq_expires_next = expires; in hrtimer_reprogram()
844 if (!ktime_before(expires, timer_cpu_base->expires_next) || in hrtimer_reprogram()
853 if (base->cpu_base != cpu_base) in hrtimer_reprogram()
856 if (expires >= cpu_base->expires_next) in hrtimer_reprogram()
863 if (cpu_base->in_hrtirq) in hrtimer_reprogram()
866 cpu_base->next_timer = timer; in hrtimer_reprogram()
886 * the next expiring timer. in update_needs_ipi()
888 seq = cpu_base->clock_was_set_seq; in update_needs_ipi()
895 if (seq == cpu_base->clock_was_set_seq) in update_needs_ipi()
903 if (cpu_base->in_hrtirq) in update_needs_ipi()
912 active &= cpu_base->active_bases; in update_needs_ipi()
915 struct timerqueue_node *next; in update_needs_ipi() local
917 next = timerqueue_getnext(&base->active); in update_needs_ipi()
918 expires = ktime_sub(next->expires, base->offset); in update_needs_ipi()
919 if (expires < cpu_base->expires_next) in update_needs_ipi()
923 if (base->clockid < HRTIMER_BASE_MONOTONIC_SOFT) in update_needs_ipi()
925 if (cpu_base->softirq_activated) in update_needs_ipi()
927 if (expires < cpu_base->softirq_expires_next) in update_needs_ipi()
943 * system is in !HIGH_RES and NOHZ mode. The NOHZ mode updates the offsets
967 raw_spin_lock_irqsave(&cpu_base->lock, flags); in clock_was_set()
972 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in clock_was_set()
1018 __releases(&timer->base->cpu_base->lock) in unlock_hrtimer_base()
1020 raw_spin_unlock_irqrestore(&timer->base->cpu_base->lock, *flags); in unlock_hrtimer_base()
1024 * hrtimer_forward() - forward the timer expiry
1052 if (WARN_ON(timer->state & HRTIMER_STATE_ENQUEUED)) in hrtimer_forward()
1078 * enqueue_hrtimer - internal function to (re)start a timer
1086 enum hrtimer_mode mode) in enqueue_hrtimer() argument
1088 debug_activate(timer, mode); in enqueue_hrtimer()
1089 WARN_ON_ONCE(!base->cpu_base->online); in enqueue_hrtimer()
1091 base->cpu_base->active_bases |= 1 << base->index; in enqueue_hrtimer()
1094 WRITE_ONCE(timer->state, HRTIMER_STATE_ENQUEUED); in enqueue_hrtimer()
1096 return timerqueue_add(&base->active, &timer->node); in enqueue_hrtimer()
1100 * __remove_hrtimer - internal function to remove a timer
1104 * High resolution timer mode reprograms the clock event device when the
1105 * timer is the one which expires next. The caller can disable this by setting
1113 struct hrtimer_cpu_base *cpu_base = base->cpu_base; in __remove_hrtimer()
1114 u8 state = timer->state; in __remove_hrtimer()
1117 WRITE_ONCE(timer->state, newstate); in __remove_hrtimer()
1121 if (!timerqueue_del(&base->active, &timer->node)) in __remove_hrtimer()
1122 cpu_base->active_bases &= ~(1 << base->index); in __remove_hrtimer()
1126 * cpu_base->next_timer. This happens when we remove the first in __remove_hrtimer()
1128 * cpu_base->next_timer. So the worst thing what can happen is in __remove_hrtimer()
1132 if (reprogram && timer == cpu_base->next_timer) in __remove_hrtimer()
1143 u8 state = timer->state; in remove_hrtimer()
1150 * resolution mode is active and the timer is on the current in remove_hrtimer()
1157 reprogram = base->cpu_base == this_cpu_ptr(&hrtimer_bases); in remove_hrtimer()
1177 const enum hrtimer_mode mode) in hrtimer_update_lowres() argument
1185 timer->is_rel = mode & HRTIMER_MODE_REL; in hrtimer_update_lowres()
1186 if (timer->is_rel) in hrtimer_update_lowres()
1198 * Find the next SOFT expiration. in hrtimer_update_softirq_timer()
1203 * reprogramming needs to be triggered, even if the next soft in hrtimer_update_softirq_timer()
1204 * hrtimer expires at the same time than the next hard in hrtimer_update_softirq_timer()
1205 * hrtimer. cpu_base->softirq_expires_next needs to be updated! in hrtimer_update_softirq_timer()
1211 * cpu_base->*next_timer is recomputed by __hrtimer_get_next_event() in hrtimer_update_softirq_timer()
1212 * cpu_base->*expires_next is only set by hrtimer_reprogram() in hrtimer_update_softirq_timer()
1214 hrtimer_reprogram(cpu_base->softirq_next_timer, reprogram); in hrtimer_update_softirq_timer()
1218 u64 delta_ns, const enum hrtimer_mode mode, in __hrtimer_start_range_ns() argument
1233 force_local = base->cpu_base == this_cpu_base; in __hrtimer_start_range_ns()
1234 force_local &= base->cpu_base->next_timer == timer; in __hrtimer_start_range_ns()
1240 force_local &= this_cpu_base->online; in __hrtimer_start_range_ns()
1255 if (mode & HRTIMER_MODE_REL) in __hrtimer_start_range_ns()
1256 tim = ktime_add_safe(tim, base->get_time()); in __hrtimer_start_range_ns()
1258 tim = hrtimer_update_lowres(timer, tim, mode); in __hrtimer_start_range_ns()
1265 mode & HRTIMER_MODE_PINNED); in __hrtimer_start_range_ns()
1270 first = enqueue_hrtimer(timer, new_base, mode); in __hrtimer_start_range_ns()
1286 struct hrtimer_cpu_base *new_cpu_base = new_base->cpu_base; in __hrtimer_start_range_ns()
1288 smp_call_function_single_async(new_cpu_base->cpu, &new_cpu_base->csd); in __hrtimer_start_range_ns()
1298 hrtimer_force_reprogram(new_base->cpu_base, 1); in __hrtimer_start_range_ns()
1303 * hrtimer_start_range_ns - (re)start an hrtimer
1307 * @mode: timer mode: absolute (HRTIMER_MODE_ABS) or
1309 * softirq based mode is considered for debug purpose only!
1312 u64 delta_ns, const enum hrtimer_mode mode) in hrtimer_start_range_ns() argument
1320 * expiry mode because unmarked timers are moved to softirq expiry. in hrtimer_start_range_ns()
1323 WARN_ON_ONCE(!(mode & HRTIMER_MODE_SOFT) ^ !timer->is_soft); in hrtimer_start_range_ns()
1325 WARN_ON_ONCE(!(mode & HRTIMER_MODE_HARD) ^ !timer->is_hard); in hrtimer_start_range_ns()
1329 if (__hrtimer_start_range_ns(timer, tim, delta_ns, mode, base)) in hrtimer_start_range_ns()
1337 * hrtimer_try_to_cancel - try to deactivate a timer
1344 * * -1 when the timer is currently executing the callback function and
1351 int ret = -1; in hrtimer_try_to_cancel()
1377 spin_lock_init(&base->softirq_expiry_lock); in hrtimer_cpu_base_init_expiry_lock()
1381 __acquires(&base->softirq_expiry_lock) in hrtimer_cpu_base_lock_expiry()
1383 spin_lock(&base->softirq_expiry_lock); in hrtimer_cpu_base_lock_expiry()
1387 __releases(&base->softirq_expiry_lock) in hrtimer_cpu_base_unlock_expiry()
1389 spin_unlock(&base->softirq_expiry_lock); in hrtimer_cpu_base_unlock_expiry()
1395 * If there is a waiter for cpu_base->expiry_lock, then it was waiting for
1402 if (atomic_read(&cpu_base->timer_waiters)) { in hrtimer_sync_wait_running()
1403 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_sync_wait_running()
1404 spin_unlock(&cpu_base->softirq_expiry_lock); in hrtimer_sync_wait_running()
1405 spin_lock(&cpu_base->softirq_expiry_lock); in hrtimer_sync_wait_running()
1406 raw_spin_lock_irq(&cpu_base->lock); in hrtimer_sync_wait_running()
1431 * - If the caller is on a remote CPU then it has to spin wait for the timer
1434 * - If the caller originates from the task which preempted the timer
1441 struct hrtimer_clock_base *base = READ_ONCE(timer->base); in hrtimer_cancel_wait_running()
1447 if (!timer->is_soft || is_migration_base(base)) { in hrtimer_cancel_wait_running()
1455 * immediately so the softirq can expire the next timer. In theory in hrtimer_cancel_wait_running()
1459 atomic_inc(&base->cpu_base->timer_waiters); in hrtimer_cancel_wait_running()
1460 spin_lock_bh(&base->cpu_base->softirq_expiry_lock); in hrtimer_cancel_wait_running()
1461 atomic_dec(&base->cpu_base->timer_waiters); in hrtimer_cancel_wait_running()
1462 spin_unlock_bh(&base->cpu_base->softirq_expiry_lock); in hrtimer_cancel_wait_running()
1476 * hrtimer_cancel - cancel a timer and wait for the handler to finish.
1498 * __hrtimer_get_remaining - get remaining time for the timer
1520 * hrtimer_get_next_event - get the time until next expiry event
1522 * Returns the next expiry time or KTIME_MAX if no timer is pending.
1530 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_get_next_event()
1535 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_get_next_event()
1541 * hrtimer_next_event_without - time until next expiry event w/o one timer
1544 * Returns the next expiry time over all timers except for the @exclude one or
1553 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_next_event_without()
1558 if (!cpu_base->softirq_activated) { in hrtimer_next_event_without()
1559 active = cpu_base->active_bases & HRTIMER_ACTIVE_SOFT; in hrtimer_next_event_without()
1563 active = cpu_base->active_bases & HRTIMER_ACTIVE_HARD; in hrtimer_next_event_without()
1568 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_next_event_without()
1593 clockid_t clock_id, enum hrtimer_mode mode) in __hrtimer_setup() argument
1595 bool softtimer = !!(mode & HRTIMER_MODE_SOFT); in __hrtimer_setup()
1601 * marked for hard interrupt expiry mode are moved into soft in __hrtimer_setup()
1605 if (IS_ENABLED(CONFIG_PREEMPT_RT) && !(mode & HRTIMER_MODE_HARD)) in __hrtimer_setup()
1617 if (clock_id == CLOCK_REALTIME && mode & HRTIMER_MODE_REL) in __hrtimer_setup()
1622 timer->is_soft = softtimer; in __hrtimer_setup()
1623 timer->is_hard = !!(mode & HRTIMER_MODE_HARD); in __hrtimer_setup()
1624 timer->base = &cpu_base->clock_base[base]; in __hrtimer_setup()
1625 timerqueue_init(&timer->node); in __hrtimer_setup()
1634 * hrtimer_setup - initialize a timer to the given clock
1638 * @mode: The modes which are relevant for initialization:
1647 clockid_t clock_id, enum hrtimer_mode mode) in hrtimer_setup() argument
1649 debug_setup(timer, clock_id, mode); in hrtimer_setup()
1650 __hrtimer_setup(timer, function, clock_id, mode); in hrtimer_setup()
1655 * hrtimer_setup_on_stack - initialize a timer on stack memory
1659 * @mode: The timer mode
1666 clockid_t clock_id, enum hrtimer_mode mode) in hrtimer_setup_on_stack() argument
1668 debug_setup_on_stack(timer, clock_id, mode); in hrtimer_setup_on_stack()
1669 __hrtimer_setup(timer, function, clock_id, mode); in hrtimer_setup_on_stack()
1686 base = READ_ONCE(timer->base); in hrtimer_active()
1687 seq = raw_read_seqcount_begin(&base->seq); in hrtimer_active()
1689 if (timer->state != HRTIMER_STATE_INACTIVE || in hrtimer_active()
1690 base->running == timer) in hrtimer_active()
1693 } while (read_seqcount_retry(&base->seq, seq) || in hrtimer_active()
1694 base != READ_ONCE(timer->base)); in hrtimer_active()
1704 * - queued: the timer is queued
1705 * - callback: the timer is being ran
1706 * - post: the timer is inactive or (re)queued
1708 * On the read side we ensure we observe timer->state and cpu_base->running
1710 * This includes timer->base changing because sequence numbers alone are
1721 unsigned long flags) __must_hold(&cpu_base->lock) in __run_hrtimer()
1727 lockdep_assert_held(&cpu_base->lock); in __run_hrtimer()
1730 base->running = timer; in __run_hrtimer()
1733 * Separate the ->running assignment from the ->state assignment. in __run_hrtimer()
1736 * hrtimer_active() cannot observe base->running == NULL && in __run_hrtimer()
1737 * timer->state == INACTIVE. in __run_hrtimer()
1739 raw_write_seqcount_barrier(&base->seq); in __run_hrtimer()
1750 timer->is_rel = false; in __run_hrtimer()
1757 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in __run_hrtimer()
1765 raw_spin_lock_irq(&cpu_base->lock); in __run_hrtimer()
1772 * Note: Because we dropped the cpu_base->lock above, in __run_hrtimer()
1777 !(timer->state & HRTIMER_STATE_ENQUEUED)) in __run_hrtimer()
1781 * Separate the ->running assignment from the ->state assignment. in __run_hrtimer()
1784 * hrtimer_active() cannot observe base->running.timer == NULL && in __run_hrtimer()
1785 * timer->state == INACTIVE. in __run_hrtimer()
1787 raw_write_seqcount_barrier(&base->seq); in __run_hrtimer()
1789 WARN_ON_ONCE(base->running != timer); in __run_hrtimer()
1790 base->running = NULL; in __run_hrtimer()
1797 unsigned int active = cpu_base->active_bases & active_mask; in __hrtimer_run_queues()
1803 basenow = ktime_add(now, base->offset); in __hrtimer_run_queues()
1805 while ((node = timerqueue_getnext(&base->active))) { in __hrtimer_run_queues()
1819 * are right-of a not yet expired timer, because that in __hrtimer_run_queues()
1839 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_run_softirq()
1844 cpu_base->softirq_activated = 0; in hrtimer_run_softirq()
1847 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_run_softirq()
1864 BUG_ON(!cpu_base->hres_active); in hrtimer_interrupt()
1865 cpu_base->nr_events++; in hrtimer_interrupt()
1866 dev->next_event = KTIME_MAX; in hrtimer_interrupt()
1868 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_interrupt()
1871 cpu_base->in_hrtirq = 1; in hrtimer_interrupt()
1873 * We set expires_next to KTIME_MAX here with cpu_base->lock in hrtimer_interrupt()
1879 cpu_base->expires_next = KTIME_MAX; in hrtimer_interrupt()
1881 if (!ktime_before(now, cpu_base->softirq_expires_next)) { in hrtimer_interrupt()
1882 cpu_base->softirq_expires_next = KTIME_MAX; in hrtimer_interrupt()
1883 cpu_base->softirq_activated = 1; in hrtimer_interrupt()
1889 /* Reevaluate the clock bases for the [soft] next expiry */ in hrtimer_interrupt()
1895 cpu_base->expires_next = expires_next; in hrtimer_interrupt()
1896 cpu_base->in_hrtirq = 0; in hrtimer_interrupt()
1897 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_interrupt()
1901 cpu_base->hang_detected = 0; in hrtimer_interrupt()
1906 * The next timer was already expired due to: in hrtimer_interrupt()
1907 * - tracing in hrtimer_interrupt()
1908 * - long lasting callbacks in hrtimer_interrupt()
1909 * - being scheduled away when running in a VM in hrtimer_interrupt()
1918 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_interrupt()
1920 cpu_base->nr_retries++; in hrtimer_interrupt()
1926 * we spent here. We schedule the next event this amount of in hrtimer_interrupt()
1929 cpu_base->nr_hangs++; in hrtimer_interrupt()
1930 cpu_base->hang_detected = 1; in hrtimer_interrupt()
1931 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_interrupt()
1934 if ((unsigned int)delta > cpu_base->max_hang_time) in hrtimer_interrupt()
1935 cpu_base->max_hang_time = (unsigned int) delta; in hrtimer_interrupt()
1963 * can switch to highres and / or nohz mode. The clocksource in hrtimer_run_queues()
1973 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_run_queues()
1976 if (!ktime_before(now, cpu_base->softirq_expires_next)) { in hrtimer_run_queues()
1977 cpu_base->softirq_expires_next = KTIME_MAX; in hrtimer_run_queues()
1978 cpu_base->softirq_activated = 1; in hrtimer_run_queues()
1983 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_run_queues()
1993 struct task_struct *task = t->task; in hrtimer_wakeup()
1995 t->task = NULL; in hrtimer_wakeup()
2003 * hrtimer_sleeper_start_expires - Start a hrtimer sleeper timer
2005 * @mode: timer mode abs/rel
2008 * to allow PREEMPT_RT to tweak the delivery mode (soft/hardirq context)
2011 enum hrtimer_mode mode) in hrtimer_sleeper_start_expires() argument
2014 * Make the enqueue delivery mode check work on RT. If the sleeper in hrtimer_sleeper_start_expires()
2015 * was initialized for hard interrupt delivery, force the mode bit. in hrtimer_sleeper_start_expires()
2017 * __hrtimer_setup_sleeper() determines the delivery mode on RT so the in hrtimer_sleeper_start_expires()
2020 if (IS_ENABLED(CONFIG_PREEMPT_RT) && sl->timer.is_hard) in hrtimer_sleeper_start_expires()
2021 mode |= HRTIMER_MODE_HARD; in hrtimer_sleeper_start_expires()
2023 hrtimer_start_expires(&sl->timer, mode); in hrtimer_sleeper_start_expires()
2028 clockid_t clock_id, enum hrtimer_mode mode) in __hrtimer_setup_sleeper() argument
2032 * marked for hard interrupt expiry mode are moved into soft in __hrtimer_setup_sleeper()
2044 * OTOH, privileged real-time user space applications rely on the in __hrtimer_setup_sleeper()
2046 * a real-time scheduling class, mark the mode for hard interrupt in __hrtimer_setup_sleeper()
2050 if (rt_or_dl_task_policy(current) && !(mode & HRTIMER_MODE_SOFT)) in __hrtimer_setup_sleeper()
2051 mode |= HRTIMER_MODE_HARD; in __hrtimer_setup_sleeper()
2054 __hrtimer_setup(&sl->timer, hrtimer_wakeup, clock_id, mode); in __hrtimer_setup_sleeper()
2055 sl->task = current; in __hrtimer_setup_sleeper()
2059 * hrtimer_setup_sleeper_on_stack - initialize a sleeper in stack memory
2062 * @mode: timer mode abs/rel
2065 clockid_t clock_id, enum hrtimer_mode mode) in hrtimer_setup_sleeper_on_stack() argument
2067 debug_setup_on_stack(&sl->timer, clock_id, mode); in hrtimer_setup_sleeper_on_stack()
2068 __hrtimer_setup_sleeper(sl, clock_id, mode); in hrtimer_setup_sleeper_on_stack()
2074 switch(restart->nanosleep.type) { in nanosleep_copyout()
2077 if (put_old_timespec32(ts, restart->nanosleep.compat_rmtp)) in nanosleep_copyout()
2078 return -EFAULT; in nanosleep_copyout()
2082 if (put_timespec64(ts, restart->nanosleep.rmtp)) in nanosleep_copyout()
2083 return -EFAULT; in nanosleep_copyout()
2088 return -ERESTART_RESTARTBLOCK; in nanosleep_copyout()
2091 static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mode) in do_nanosleep() argument
2097 hrtimer_sleeper_start_expires(t, mode); in do_nanosleep()
2099 if (likely(t->task)) in do_nanosleep()
2102 hrtimer_cancel(&t->timer); in do_nanosleep()
2103 mode = HRTIMER_MODE_ABS; in do_nanosleep()
2105 } while (t->task && !signal_pending(current)); in do_nanosleep()
2109 if (!t->task) in do_nanosleep()
2112 restart = ¤t->restart_block; in do_nanosleep()
2113 if (restart->nanosleep.type != TT_NONE) { in do_nanosleep()
2114 ktime_t rem = hrtimer_expires_remaining(&t->timer); in do_nanosleep()
2123 return -ERESTART_RESTARTBLOCK; in do_nanosleep()
2131 hrtimer_setup_sleeper_on_stack(&t, restart->nanosleep.clockid, HRTIMER_MODE_ABS); in hrtimer_nanosleep_restart()
2132 hrtimer_set_expires_tv64(&t.timer, restart->nanosleep.expires); in hrtimer_nanosleep_restart()
2138 long hrtimer_nanosleep(ktime_t rqtp, const enum hrtimer_mode mode, in hrtimer_nanosleep() argument
2145 hrtimer_setup_sleeper_on_stack(&t, clockid, mode); in hrtimer_nanosleep()
2146 hrtimer_set_expires_range_ns(&t.timer, rqtp, current->timer_slack_ns); in hrtimer_nanosleep()
2147 ret = do_nanosleep(&t, mode); in hrtimer_nanosleep()
2148 if (ret != -ERESTART_RESTARTBLOCK) in hrtimer_nanosleep()
2152 if (mode == HRTIMER_MODE_ABS) { in hrtimer_nanosleep()
2153 ret = -ERESTARTNOHAND; in hrtimer_nanosleep()
2157 restart = ¤t->restart_block; in hrtimer_nanosleep()
2158 restart->nanosleep.clockid = t.timer.base->clockid; in hrtimer_nanosleep()
2159 restart->nanosleep.expires = hrtimer_get_expires_tv64(&t.timer); in hrtimer_nanosleep()
2174 return -EFAULT; in SYSCALL_DEFINE2()
2177 return -EINVAL; in SYSCALL_DEFINE2()
2179 current->restart_block.fn = do_no_restart_syscall; in SYSCALL_DEFINE2()
2180 current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; in SYSCALL_DEFINE2()
2181 current->restart_block.nanosleep.rmtp = rmtp; in SYSCALL_DEFINE2()
2196 return -EFAULT; in SYSCALL_DEFINE2()
2199 return -EINVAL; in SYSCALL_DEFINE2()
2201 current->restart_block.fn = do_no_restart_syscall; in SYSCALL_DEFINE2()
2202 current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE; in SYSCALL_DEFINE2()
2203 current->restart_block.nanosleep.compat_rmtp = rmtp; in SYSCALL_DEFINE2()
2210 * Functions related to boot-time initialization:
2218 struct hrtimer_clock_base *clock_b = &cpu_base->clock_base[i]; in hrtimers_prepare_cpu()
2220 clock_b->cpu_base = cpu_base; in hrtimers_prepare_cpu()
2221 seqcount_raw_spinlock_init(&clock_b->seq, &cpu_base->lock); in hrtimers_prepare_cpu()
2222 timerqueue_init_head(&clock_b->active); in hrtimers_prepare_cpu()
2225 cpu_base->cpu = cpu; in hrtimers_prepare_cpu()
2235 cpu_base->active_bases = 0; in hrtimers_cpu_starting()
2236 cpu_base->hres_active = 0; in hrtimers_cpu_starting()
2237 cpu_base->hang_detected = 0; in hrtimers_cpu_starting()
2238 cpu_base->next_timer = NULL; in hrtimers_cpu_starting()
2239 cpu_base->softirq_next_timer = NULL; in hrtimers_cpu_starting()
2240 cpu_base->expires_next = KTIME_MAX; in hrtimers_cpu_starting()
2241 cpu_base->softirq_expires_next = KTIME_MAX; in hrtimers_cpu_starting()
2242 cpu_base->online = 1; in hrtimers_cpu_starting()
2254 while ((node = timerqueue_getnext(&old_base->active))) { in migrate_hrtimer_list()
2265 timer->base = new_base; in migrate_hrtimer_list()
2290 raw_spin_lock(&old_base->lock); in hrtimers_cpu_dying()
2291 raw_spin_lock_nested(&new_base->lock, SINGLE_DEPTH_NESTING); in hrtimers_cpu_dying()
2294 migrate_hrtimer_list(&old_base->clock_base[i], in hrtimers_cpu_dying()
2295 &new_base->clock_base[i]); in hrtimers_cpu_dying()
2303 /* Tell the other CPU to retrigger the next event */ in hrtimers_cpu_dying()
2306 raw_spin_unlock(&new_base->lock); in hrtimers_cpu_dying()
2307 old_base->online = 0; in hrtimers_cpu_dying()
2308 raw_spin_unlock(&old_base->lock); in hrtimers_cpu_dying()