diff options
| author | Anna-Maria Behnsen <anna-maria@linutronix.de> | 2025-05-19 10:33:28 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2025-06-19 14:28:23 +0200 |
| commit | 22c62b9a84b8f16ca0277e133a0cd62a259fee7c (patch) | |
| tree | 4a5f0de94a756e350c74da8a0dace433baf3059f /kernel/time/timekeeping.c | |
| parent | 6168024604236cb2bb1004ea8459c8ece2c4ef5f (diff) | |
timekeeping: Introduce auxiliary timekeepers
Provide timekeepers for auxiliary clocks and initialize them during
boot.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <jstultz@google.com>
Link: https://lore.kernel.org/all/20250519083026.350061049@linutronix.de
Diffstat (limited to 'kernel/time/timekeeping.c')
| -rw-r--r-- | kernel/time/timekeeping.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index bf59bacc97db..19f4af1a37ea 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -53,7 +53,11 @@ struct tk_data { raw_spinlock_t lock; } ____cacheline_aligned; -static struct tk_data tk_core; +static struct tk_data timekeeper_data[TIMEKEEPERS_MAX]; + +/* The core timekeeper */ +#define tk_core (timekeeper_data[TIMEKEEPER_CORE]) + /* flag for if timekeeping is suspended */ int __read_mostly timekeeping_suspended; @@ -113,6 +117,12 @@ static struct tk_fast tk_fast_raw ____cacheline_aligned = { .base[1] = FAST_TK_INIT, }; +#ifdef CONFIG_POSIX_AUX_CLOCKS +static __init void tk_aux_setup(void); +#else +static inline void tk_aux_setup(void) { } +#endif + unsigned long timekeeper_lock_irqsave(void) { unsigned long flags; @@ -1589,7 +1599,6 @@ void ktime_get_raw_ts64(struct timespec64 *ts) } EXPORT_SYMBOL(ktime_get_raw_ts64); - /** * timekeeping_valid_for_hres - Check if timekeeping is suitable for hres */ @@ -1701,6 +1710,7 @@ void __init timekeeping_init(void) struct clocksource *clock; tkd_basic_setup(&tk_core, TIMEKEEPER_CORE, true); + tk_aux_setup(); read_persistent_wall_and_boot_offset(&wall_time, &boot_offset); if (timespec64_valid_settod(&wall_time) && @@ -2630,3 +2640,11 @@ void hardpps(const struct timespec64 *phase_ts, const struct timespec64 *raw_ts) } EXPORT_SYMBOL(hardpps); #endif /* CONFIG_NTP_PPS */ + +#ifdef CONFIG_POSIX_AUX_CLOCKS +static __init void tk_aux_setup(void) +{ + for (int i = TIMEKEEPER_AUX_FIRST; i <= TIMEKEEPER_AUX_LAST; i++) + tkd_basic_setup(&timekeeper_data[i], i, false); +} +#endif /* CONFIG_POSIX_AUX_CLOCKS */ |