/* * linux/kernel/time/timekeeping.c * * Kernel timekeeping code and accessor functions * * This code was moved from linux/kernel/timer.c. * Please see that file for copyright and history logs. * */ #include <linux/timekeeper_internal.h>#include <linux/module.h>#include <linux/interrupt.h>#include <linux/percpu.h>#include <linux/init.h>#include <linux/mm.h>#include <linux/sched.h>#include <linux/syscore_ops.h>#include <linux/clocksource.h>#include <linux/jiffies.h>#include <linux/time.h>#include <linux/tick.h>#include <linux/stop_machine.h>#include <linux/pvclock_gtod.h> #include "tick-internal.h"#include "ntp_internal.h"#include "timekeeping_internal.h" #define TK_CLEAR_NTP (1 << 0)#define TK_MIRROR (1 << 1)#define TK_CLOCK_WAS_SET (1 << 2) static struct timekeeper timekeeper;static DEFINE_RAW_SPINLOCK(timekeeper_lock);static seqcount_t timekeeper_seq;static struct timekeeper shadow_timekeeper; /* flag for if timekeeping is suspended */int __read_mostly timekeeping_suspended; /* Flag for if there is a persistent clock on this platform */bool __read_mostly persistent_clock_exist = false; static inline void tk_normalize_xtime(struct timekeeper *tk){ while (tk->xtime_nsec >= ((u64)NSEC_PER_SEC << tk->shift)) { tk->xtime_nsec -= (u64)NSEC_PER_SEC << tk->shift; tk->xtime_sec++; }} static void tk_set_xtime(struct timekeeper *tk, const struct timespec *ts){ tk->xtime_sec = ts->tv_sec; tk->xtime_nsec = (u64)ts->tv_nsec << tk->shift;} static void tk_xtime_add(struct timekeeper *tk, const struct timespec *ts){ tk->xtime_sec += ts->tv_sec; tk->xtime_nsec += (u64)ts->tv_nsec << tk->shift; tk_normalize_xtime(tk);} static void tk_set_wall_to_mono(struct timekeeper *tk, struct timespec wtm){ struct timespec tmp; /* * Verify consistency of: offset_real = -wall_to_monotonic * before modifying anything */ set_normalized_timespec(&tmp, -tk->wall_to_monotonic.tv_sec, -tk->wall_to_monotonic.tv_nsec); WARN_ON_ONCE(tk->offs_real.tv64 != timespec_to_ktime(tmp).tv64); tk->wall_to_monotonic = wtm; set_normalized_timespec(&tmp, -wtm.tv_sec, -wtm.tv_nsec); tk->offs_real = timespec_to_ktime(tmp); tk->offs_tai = ktime_sub(tk->offs_real, ktime_set(tk->tai_offset, 0));} static void tk_set_sleep_time(struct timekeeper *tk, struct timespec t){ /* Verify consistency before modifying */ WARN_ON_ONCE(tk->offs_boot.tv64 != timespec_to_ktime(tk->total_sleep_time).tv64); tk->total_sleep_time = t; tk->offs_boot = timespec_to_ktime(t);} /** * timekeeper_setup_internals - Set up internals to use clocksource clock. * * @clock: Pointer to clocksource. * * Calculates a fixed cycle/nsec interval for a given clocksource/adjustment * pair and interval request. * * Unless you're the timekeeping code, you should not be using this! */static void tk_setup_internals(struct timekeeper *tk, struct clocksource *clock){ cycle_t interval; u64 tmp, ntpinterval; struct clocksource *old_clock; old_clock = tk->clock; tk->clock = clock; tk->cycle_last = clock->cycle_last = clock->read(clock); /* Do the ns -> cycle conversion first, using original mult */ tmp = NTP_INTERVAL_LENGTH; tmp <<= clock->shift; ntpinterval = tmp; tmp += clock->mult/2; do_div(tmp, clock->mult); if (tmp == 0) tmp = 1; interval = (cycle_t) tmp; tk->cycle_interval = interval; /* Go back from cycles -> shifted ns */ tk->xtime_interval = (u64) interval * clock->mult; tk->xtime_remainder = ntpinterval - tk->xtime_interval; tk->raw_interval = ((u64) interval * clock->mult) >> clock->shift; /* if changing clocks, convert xtime_nsec shift units */ if (old_clock) { int shift_change = clock->shift - old_clock->shift; if (shift_change < 0) tk->xtime_nsec >>= -shift_change; else tk->xtime_nsec <<= shift_change; } tk->shift = clock->shift; tk->ntp_error = 0; tk->ntp_error_shift = NTP_SCALE_SHIFT - clock->shift; /* * The timekeeper keeps its own mult values for the currently * active clocksource. These value will be adjusted via NTP * to counteract clock drifting. */ tk->mult = clock->mult;} /* Timekeeper helper functions. */ #ifdef CONFIG_ARCH_USES_GETTIMEOFFSETu32 (*arch_gettimeoffset)(void); u32 get_arch_timeoffset(void){ if (likely(arch_gettimeoffset)) return arch_gettimeoffset(); return 0;}#elsestatic inline u32 get_arch_timeoffset(void) { return 0; }#endif static inline s64 timekeeping_get_ns(struct timekeeper *tk){ cycle_t cycle_now, cycle_delta; struct clocksource *clock; s64 nsec; /* read clocksource: */ clock = tk->clock; cycle_now = clock->read(clock); /* calculate the delta since the last update_wall_time: */ cycle_delta = (cycle_now - clock->cycle_last) & clock->mask; nsec = cycle_delta * tk->mult + tk->xtime_nsec; nsec >>= tk->shift; /* If arch requires, add in get_arch_timeoffset() */ return nsec + get_arch_timeoffset();} static inline s64 timekeeping_get_ns_raw(struct timekeeper *tk){ cycle_t cycle_now, cycle_delta; struct clocksource *clock; s64 nsec; /* read clocksource: */ clock = tk->clock; cycle_now = clock->read(clock); /* calculate the delta since the last update_wall_time: */ cycle_delta = (cycle_now - clock->cycle_last) & clock->mask; /* convert delta to nanoseconds. */ nsec = clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift); /* If arch requires, add in get_arch_timeoffset() */ return nsec + get_arch_timeoffset();} static RAW_NOTIFIER_HEAD(pvclock_gtod_chain); static void update_pvclock_gtod(struct timekeeper *tk, bool was_set){ raw_notifier_call_chain(&pvclock_gtod_chain, was_set, tk);} /** * pvclock_gtod_register_notifier - register a pvclock timedata update listener */int pvclock_gtod_register_notifier(struct notifier_block *nb){ struct timekeeper *tk = &timekeeper; unsigned long flags; int ret; raw_spin_lock_irqsave(&timekeeper_lock, flags); ret = raw_notifier_chain_register(&pvclock_gtod_chain, nb); update_pvclock_gtod(tk, true); raw_spin_unlock_irqrestore(&timekeeper_lock, flags); return ret;}EXPORT_SYMBOL_GPL(pvclock_gtod_register_notifier); /** * pvclock_gtod_unregister_notifier - unregister a pvclock * timedata update listener */int pvclock_gtod_unregister_notifier(struct notifier_block *nb){ unsigned long flags; int ret; raw_spin_lock_irqsave(&timekeeper_lock, flags); ret = raw_notifier_chain_unregister(&pvclock_gtod_chain, nb); raw_spin_unlock_irqrestore(&timekeeper_lock, flags); return ret;}EXPORT_SYMBOL_GPL(pvclock_gtod_unregister_notifier); /* must hold timekeeper_lock */static void timekeeping_update(struct timekeeper *tk, unsigned int action){ if (action & TK_CLEAR_NTP) { tk->ntp_error = 0; ntp_clear(); } update_vsyscall(tk); update_pvclock_gtod(tk, action & TK_CLOCK_WAS_SET); if (action & TK_MIRROR) memcpy(&shadow_timekeeper, &timekeeper, sizeof(timekeeper));} /** * timekeeping_forward_now - update clock to the current time * * Forward the current clock to update its state since the last call to * update_wall_time(). This is useful before significant clock changes, * as it avoids having to deal with this time offset explicitly. */static void timekeeping_forward_now(struct timekeeper *tk){ cycle_t cycle_now, cycle_delta; struct clocksource *clock; s64 nsec; clock = tk->clock; cycle_now = clock->read(clock); cycle_delta = (cycle_now - clock->cycle_last) & clock->mask; tk->cycle_last = clock->cycle_last = cycle_now; tk->xtime_nsec += cycle_delta * tk->mult; /* If arch requires, add in get_arch_timeoffset() */ tk->xtime_nsec += (u64)get_arch_timeoffset() << tk->shift; tk_normalize_xtime(tk); nsec = clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift); timespec_add_ns(&tk->raw_time, nsec);} /** * __getnstimeofday - Returns the time of day in a timespec. * @ts: pointer to the timespec to be set * * Updates the time of day in the timespec. * Returns 0 on success, or -ve when suspended (timespec will be undefined). */int __getnstimeofday(struct timespec *ts){ struct timekeeper *tk = &timekeeper; unsigned long seq; s64 nsecs = 0; do { seq = read_seqcount_begin(&timekeeper_seq); ts->tv_sec = tk->xtime_sec; nsecs = timekeeping_get_ns(tk); } while (read_seqcount_retry(&timekeeper_seq, seq)); ts->tv_nsec = 0; timespec_add_ns(ts, nsecs); /* * Do not bail out early, in case there were callers still using * the value, even in the face of the WARN_ON. */ if (unlikely(timekeeping_suspended)) return -EAGAIN; return 0;}EXPORT_SYMBOL(__getnstimeofday); /** * getnstimeofday - Returns the time of day in a timespec. * @ts: pointer to the timespec to be set * * Returns the time of day in a timespec (WARN if suspended). */void getnstimeofday(struct timespec *ts){ WARN_ON(__getnstimeofday(ts));}EXPORT_SYMBOL(getnstimeofday); ktime_t ktime_get(void){ struct timekeeper *tk = &timekeeper; unsigned int seq; s64 secs, nsecs; WARN_ON(timekeeping_suspended); do { seq = read_seqcount_begin(&timekeeper_seq); secs = tk->xtime_sec + tk->wall_to_monotonic.tv_sec; nsecs = timekeeping_get_ns(tk) + tk->wall_to_monotonic.tv_nsec; } while (read_seqcount_retry(&timekeeper_seq, seq)); /* * Use ktime_set/ktime_add_ns to create a proper ktime on * 32-bit architectures without CONFIG_KTIME_SCALAR. */ return ktime_add_ns(ktime_set(secs, 0), nsecs);}EXPORT_SYMBOL_GPL(ktime_get); /** * ktime_get_ts - get the monotonic clock in timespec format * @ts: pointer to timespec variable * * The function calculates the monotonic clock from the realtime * clock and the wall_to_monotonic offset and stores the result * in normalized timespec format in the variable pointed to by @ts. */void ktime_get_ts(struct timespec *ts){ struct timekeeper *tk = &timekeeper; struct timespec tomono; s64 nsec; unsigned int seq; WARN_ON(timekeeping_suspended); do { seq = read_seqcount_begin(&timekeeper_seq); ts->tv_sec = tk->xtime_sec; nsec = timekeeping_get_ns(tk); tomono = tk->wall_to_monotonic; } while (read_seqcount_retry(&timekeeper_seq, seq)); ts->tv_sec += tomono.tv_sec; ts->tv_nsec = 0; timespec_add_ns(ts, nsec + tomono.tv_nsec);}EXPORT_SYMBOL_GPL(ktime_get_ts); /** * timekeeping_clocktai - Returns the TAI time of day in a timespec * @ts: pointer to the timespec to be set * * Returns the time of day in a timespec. */void timekeeping_clocktai(struct timespec *ts){ struct timekeeper *tk = &timekeeper; unsigned long seq; u64 nsecs; WARN_ON(timekeeping_suspended); do { seq = read_seqcount_begin(&timekeeper_seq); ts->tv_sec = tk->xtime_sec + tk->tai_offset; nsecs = timekeeping_get_ns(tk); } while (read_seqcount_retry(&timekeeper_seq, seq)); ts->tv_nsec = 0; timespec_add_ns(ts, nsecs); }EXPORT_SYMBOL(timekeeping_clocktai); /** * ktime_get_clocktai - Returns the TAI time of day in a ktime * * Returns the time of day in a ktime. */ktime_t ktime_get_clocktai(void){ struct timespec ts; timekeeping_clocktai(&ts); return timespec_to_ktime(ts);}EXPORT_SYMBOL(ktime_get_clocktai); #ifdef CONFIG_NTP_PPS /** * getnstime_raw_and_real - get day and raw monotonic time in timespec format * @ts_raw: pointer to the timespec to be set to raw monotonic time * @ts_real: pointer to the timespec to be set to the time of day * * This function reads both the time of day and raw monotonic time at the * same time atomically and stores the resulting timestamps in timespec * format. */void getnstime_raw_and_real(struct timespec *ts_raw, struct timespec *ts_real){ struct timekeeper *tk = &timekeeper; unsigned long seq; s64 nsecs_raw, nsecs_real; WARN_ON_ONCE(timekeeping_suspended); do { seq = read_seqcount_begin(&timekeeper_seq); *ts_raw = tk->raw_time; ts_real->tv_sec = tk->xtime_sec; ts_real->tv_nsec = 0; nsecs_raw = timekeeping_get_ns_raw(tk); nsecs_real = timekeeping_get_ns(tk); } while (read_seqcount_retry(&timekeeper_seq, seq)); timespec_add_ns(ts_raw, nsecs_raw); timespec_add_ns(ts_real, nsecs_real);}EXPORT_SYMBOL(getnstime_raw_and_real); #endif /* CONFIG_NTP_PPS */ /** * do_gettimeofday - Returns the time of day in a timeval * @tv: pointer to the timeval to be set * * NOTE: Users should be converted to using getnstimeofday() */void do_gettimeofday(struct timeval *tv){ struct timespec now; getnstimeofday(&now); tv->tv_sec = now.tv_sec; tv->tv_usec = now.tv_nsec/1000;}EXPORT_SYMBOL(do_gettimeofday); /** * do_settimeofday - Sets the time of day * @tv: pointer to the timespec variable containing the new time * * Sets the time of day to the new time and update NTP and notify hrtimers */int do_settimeofday(const struct timespec *tv){ struct timekeeper *tk = &timekeeper; struct timespec ts_delta, xt; unsigned long flags; if (!timespec_valid_strict(tv))Lines 1–500 of 1741. 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/* * linux/kernel/time/timekeeping.c * * Kernel timekeeping code and accessor functions * * This code was moved from linux/kernel/timer.c. * Please see that file for copyright and history logs. * */ #include <linux/timekeeper_internal.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/percpu.h> #include <linux/init.h> #include <linux/mm.h> #include <linux/sched.h> #include <linux/syscore_ops.h> #include <linux/clocksource.h> #include <linux/jiffies.h> #include <linux/time.h> #include <linux/tick.h> #include <linux/stop_machine.h> #include <linux/pvclock_gtod.h> #include "tick-internal.h" #include "ntp_internal.h" #include "timekeeping_internal.h" #define TK_CLEAR_NTP (1 << 0) #define TK_MIRROR (1 << 1) #define TK_CLOCK_WAS_SET (1 << 2) static struct timekeeper timekeeper; static DEFINE_RAW_SPINLOCK(timekeeper_lock); static seqcount_t timekeeper_seq; static struct timekeeper shadow_timekeeper; /* flag for if timekeeping is suspended */ int __read_mostly timekeeping_suspended; /* Flag for if there is a persistent clock on this platform */ bool __read_mostly persistent_clock_exist = false; static inline void tk_normalize_xtime(struct timekeeper *tk) { while (tk->xtime_nsec >= ((u64)NSEC_PER_SEC << tk->shift)) { tk->xtime_nsec -= (u64)NSEC_PER_SEC << tk->shift; tk->xtime_sec++; } } static void tk_set_xtime(struct timekeeper *tk, const struct timespec *ts) { tk->xtime_sec = ts->tv_sec; tk->xtime_nsec = (u64)ts->tv_nsec << tk->shift; } static void tk_xtime_add(struct timekeeper *tk, const struct timespec *ts) { tk->xtime_sec += ts->tv_sec; tk->xtime_nsec += (u64)ts->tv_nsec << tk->shift; tk_normalize_xtime(tk); } static void tk_set_wall_to_mono(struct timekeeper *tk, struct timespec wtm) { struct timespec tmp; /* * Verify consistency of: offset_real = -wall_to_monotonic * before modifying anything */ set_normalized_timespec(&tmp, -tk->wall_to_monotonic.tv_sec, -tk->wall_to_monotonic.tv_nsec); WARN_ON_ONCE(tk->offs_real.tv64 != timespec_to_ktime(tmp).tv64); tk->wall_to_monotonic = wtm; set_normalized_timespec(&tmp, -wtm.tv_sec, -wtm.tv_nsec); tk->offs_real = timespec_to_ktime(tmp); tk->offs_tai = ktime_sub(tk->offs_real, ktime_set(tk->tai_offset, 0)); } static void tk_set_sleep_time(struct timekeeper *tk, struct timespec t) { /* Verify consistency before modifying */ WARN_ON_ONCE(tk->offs_boot.tv64 != timespec_to_ktime(tk->total_sleep_time).tv64); tk->total_sleep_time = t; tk->offs_boot = timespec_to_ktime(t); } /** * timekeeper_setup_internals - Set up internals to use clocksource clock. * * @clock: Pointer to clocksource. * * Calculates a fixed cycle/nsec interval for a given clocksource/adjustment * pair and interval request. * * Unless you're the timekeeping code, you should not be using this! */ static void tk_setup_internals(struct timekeeper *tk, struct clocksource *clock) { cycle_t interval; u64 tmp, ntpinterval; struct clocksource *old_clock; old_clock = tk->clock; tk->clock = clock; tk->cycle_last = clock->cycle_last = clock->read(clock); /* Do the ns -> cycle conversion first, using original mult */ tmp = NTP_INTERVAL_LENGTH; tmp <<= clock->shift; ntpinterval = tmp; tmp += clock->mult/2; do_div(tmp, clock->mult); if (tmp == 0) tmp = 1; interval = (cycle_t) tmp; tk->cycle_interval = interval; /* Go back from cycles -> shifted ns */ tk->xtime_interval = (u64) interval * clock->mult; tk->xtime_remainder = ntpinterval - tk->xtime_interval; tk->raw_interval = ((u64) interval * clock->mult) >> clock->shift; /* if changing clocks, convert xtime_nsec shift units */ if (old_clock) { int shift_change = clock->shift - old_clock->shift; if (shift_change < 0) tk->xtime_nsec >>= -shift_change; else tk->xtime_nsec <<= shift_change; } tk->shift = clock->shift; tk->ntp_error = 0; tk->ntp_error_shift = NTP_SCALE_SHIFT - clock->shift; /* * The timekeeper keeps its own mult values for the currently * active clocksource. These value will be adjusted via NTP * to counteract clock drifting. */ tk->mult = clock->mult; } /* Timekeeper helper functions. */ #ifdef CONFIG_ARCH_USES_GETTIMEOFFSET u32 (*arch_gettimeoffset)(void); u32 get_arch_timeoffset(void) { if (likely(arch_gettimeoffset)) return arch_gettimeoffset(); return 0; } #else static inline u32 get_arch_timeoffset(void) { return 0; } #endif static inline s64 timekeeping_get_ns(struct timekeeper *tk) { cycle_t cycle_now, cycle_delta; struct clocksource *clock; s64 nsec; /* read clocksource: */ clock = tk->clock; cycle_now = clock->read(clock); /* calculate the delta since the last update_wall_time: */ cycle_delta = (cycle_now - clock->cycle_last) & clock->mask; nsec = cycle_delta * tk->mult + tk->xtime_nsec; nsec >>= tk->shift; /* If arch requires, add in get_arch_timeoffset() */ return nsec + get_arch_timeoffset(); } static inline s64 timekeeping_get_ns_raw(struct timekeeper *tk) { cycle_t cycle_now, cycle_delta; struct clocksource *clock; s64 nsec; /* read clocksource: */ clock = tk->clock; cycle_now = clock->read(clock); /* calculate the delta since the last update_wall_time: */ cycle_delta = (cycle_now - clock->cycle_last) & clock->mask; /* convert delta to nanoseconds. */ nsec = clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift); /* If arch requires, add in get_arch_timeoffset() */ return nsec + get_arch_timeoffset(); } static RAW_NOTIFIER_HEAD(pvclock_gtod_chain); static void update_pvclock_gtod(struct timekeeper *tk, bool was_set) { raw_notifier_call_chain(&pvclock_gtod_chain, was_set, tk); } /** * pvclock_gtod_register_notifier - register a pvclock timedata update listener */ int pvclock_gtod_register_notifier(struct notifier_block *nb) { struct timekeeper *tk = &timekeeper; unsigned long flags; int ret; raw_spin_lock_irqsave(&timekeeper_lock, flags); ret = raw_notifier_chain_register(&pvclock_gtod_chain, nb); update_pvclock_gtod(tk, true); raw_spin_unlock_irqrestore(&timekeeper_lock, flags); return ret; } EXPORT_SYMBOL_GPL(pvclock_gtod_register_notifier); /** * pvclock_gtod_unregister_notifier - unregister a pvclock * timedata update listener */ int pvclock_gtod_unregister_notifier(struct notifier_block *nb) { unsigned long flags; int ret; raw_spin_lock_irqsave(&timekeeper_lock, flags); ret = raw_notifier_chain_unregister(&pvclock_gtod_chain, nb); raw_spin_unlock_irqrestore(&timekeeper_lock, flags); return ret; } EXPORT_SYMBOL_GPL(pvclock_gtod_unregister_notifier); /* must hold timekeeper_lock */ static void timekeeping_update(struct timekeeper *tk, unsigned int action) { if (action & TK_CLEAR_NTP) { tk->ntp_error = 0; ntp_clear(); } update_vsyscall(tk); update_pvclock_gtod(tk, action & TK_CLOCK_WAS_SET); if (action & TK_MIRROR) memcpy(&shadow_timekeeper, &timekeeper, sizeof(timekeeper)); } /** * timekeeping_forward_now - update clock to the current time * * Forward the current clock to update its state since the last call to * update_wall_time(). This is useful before significant clock changes, * as it avoids having to deal with this time offset explicitly. */ static void timekeeping_forward_now(struct timekeeper *tk) { cycle_t cycle_now, cycle_delta; struct clocksource *clock; s64 nsec; clock = tk->clock; cycle_now = clock->read(clock); cycle_delta = (cycle_now - clock->cycle_last) & clock->mask; tk->cycle_last = clock->cycle_last = cycle_now; tk->xtime_nsec += cycle_delta * tk->mult; /* If arch requires, add in get_arch_timeoffset() */ tk->xtime_nsec += (u64)get_arch_timeoffset() << tk->shift; tk_normalize_xtime(tk); nsec = clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift); timespec_add_ns(&tk->raw_time, nsec); } /** * __getnstimeofday - Returns the time of day in a timespec. * @ts: pointer to the timespec to be set * * Updates the time of day in the timespec. * Returns 0 on success, or -ve when suspended (timespec will be undefined). */ int __getnstimeofday(struct timespec *ts) { struct timekeeper *tk = &timekeeper; unsigned long seq; s64 nsecs = 0; do { seq = read_seqcount_begin(&timekeeper_seq); ts->tv_sec = tk->xtime_sec; nsecs = timekeeping_get_ns(tk); } while (read_seqcount_retry(&timekeeper_seq, seq)); ts->tv_nsec = 0; timespec_add_ns(ts, nsecs); /* * Do not bail out early, in case there were callers still using * the value, even in the face of the WARN_ON. */ if (unlikely(timekeeping_suspended)) return -EAGAIN; return 0; } EXPORT_SYMBOL(__getnstimeofday); /** * getnstimeofday - Returns the time of day in a timespec. * @ts: pointer to the timespec to be set * * Returns the time of day in a timespec (WARN if suspended). */ void getnstimeofday(struct timespec *ts) { WARN_ON(__getnstimeofday(ts)); } EXPORT_SYMBOL(getnstimeofday); ktime_t ktime_get(void) { struct timekeeper *tk = &timekeeper; unsigned int seq; s64 secs, nsecs; WARN_ON(timekeeping_suspended); do { seq = read_seqcount_begin(&timekeeper_seq); secs = tk->xtime_sec + tk->wall_to_monotonic.tv_sec; nsecs = timekeeping_get_ns(tk) + tk->wall_to_monotonic.tv_nsec; } while (read_seqcount_retry(&timekeeper_seq, seq)); /* * Use ktime_set/ktime_add_ns to create a proper ktime on * 32-bit architectures without CONFIG_KTIME_SCALAR. */ return ktime_add_ns(ktime_set(secs, 0), nsecs); } EXPORT_SYMBOL_GPL(ktime_get); /** * ktime_get_ts - get the monotonic clock in timespec format * @ts: pointer to timespec variable * * The function calculates the monotonic clock from the realtime * clock and the wall_to_monotonic offset and stores the result * in normalized timespec format in the variable pointed to by @ts. */ void ktime_get_ts(struct timespec *ts) { struct timekeeper *tk = &timekeeper; struct timespec tomono; s64 nsec; unsigned int seq; WARN_ON(timekeeping_suspended); do { seq = read_seqcount_begin(&timekeeper_seq); ts->tv_sec = tk->xtime_sec; nsec = timekeeping_get_ns(tk); tomono = tk->wall_to_monotonic; } while (read_seqcount_retry(&timekeeper_seq, seq)); ts->tv_sec += tomono.tv_sec; ts->tv_nsec = 0; timespec_add_ns(ts, nsec + tomono.tv_nsec); } EXPORT_SYMBOL_GPL(ktime_get_ts); /** * timekeeping_clocktai - Returns the TAI time of day in a timespec * @ts: pointer to the timespec to be set * * Returns the time of day in a timespec. */ void timekeeping_clocktai(struct timespec *ts) { struct timekeeper *tk = &timekeeper; unsigned long seq; u64 nsecs; WARN_ON(timekeeping_suspended); do { seq = read_seqcount_begin(&timekeeper_seq); ts->tv_sec = tk->xtime_sec + tk->tai_offset; nsecs = timekeeping_get_ns(tk); } while (read_seqcount_retry(&timekeeper_seq, seq)); ts->tv_nsec = 0; timespec_add_ns(ts, nsecs); } EXPORT_SYMBOL(timekeeping_clocktai); /** * ktime_get_clocktai - Returns the TAI time of day in a ktime * * Returns the time of day in a ktime. */ ktime_t ktime_get_clocktai(void) { struct timespec ts; timekeeping_clocktai(&ts); return timespec_to_ktime(ts); } EXPORT_SYMBOL(ktime_get_clocktai); #ifdef CONFIG_NTP_PPS /** * getnstime_raw_and_real - get day and raw monotonic time in timespec format * @ts_raw: pointer to the timespec to be set to raw monotonic time * @ts_real: pointer to the timespec to be set to the time of day * * This function reads both the time of day and raw monotonic time at the * same time atomically and stores the resulting timestamps in timespec * format. */ void getnstime_raw_and_real(struct timespec *ts_raw, struct timespec *ts_real) { struct timekeeper *tk = &timekeeper; unsigned long seq; s64 nsecs_raw, nsecs_real; WARN_ON_ONCE(timekeeping_suspended); do { seq = read_seqcount_begin(&timekeeper_seq); *ts_raw = tk->raw_time; ts_real->tv_sec = tk->xtime_sec; ts_real->tv_nsec = 0; nsecs_raw = timekeeping_get_ns_raw(tk); nsecs_real = timekeeping_get_ns(tk); } while (read_seqcount_retry(&timekeeper_seq, seq)); timespec_add_ns(ts_raw, nsecs_raw); timespec_add_ns(ts_real, nsecs_real); } EXPORT_SYMBOL(getnstime_raw_and_real); #endif /* CONFIG_NTP_PPS */ /** * do_gettimeofday - Returns the time of day in a timeval * @tv: pointer to the timeval to be set * * NOTE: Users should be converted to using getnstimeofday() */ void do_gettimeofday(struct timeval *tv) { struct timespec now; getnstimeofday(&now); tv->tv_sec = now.tv_sec; tv->tv_usec = now.tv_nsec/1000; } EXPORT_SYMBOL(do_gettimeofday); /** * do_settimeofday - Sets the time of day * @tv: pointer to the timespec variable containing the new time * * Sets the time of day to the new time and update NTP and notify hrtimers */ int do_settimeofday(const struct timespec *tv) { struct timekeeper *tk = &timekeeper; struct timespec ts_delta, xt; unsigned long flags; if (!timespec_valid_strict(tv))