diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2025-06-25 20:38:32 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2025-06-27 20:13:12 +0200 |
| commit | 606424bf4ffd9d27865c45b5707c1edac6b187ed (patch) | |
| tree | ab9f8ba00bb52dea38a03f9bd44c3da8967afbf9 | |
| parent | 05bc6e6290f91d2d40086ab4ef52da21c14ec4b6 (diff) | |
timekeeping: Add minimal posix-timers support for auxiliary clocks
Provide clock_getres(2) and clock_gettime(2) for auxiliary clocks.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <jstultz@google.com>
Link: https://lore.kernel.org/all/20250625183757.932220594@linutronix.de
| -rw-r--r-- | kernel/time/posix-timers.c | 3 | ||||
| -rw-r--r-- | kernel/time/posix-timers.h | 1 | ||||
| -rw-r--r-- | kernel/time/timekeeping.c | 21 |
3 files changed, 25 insertions, 0 deletions
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 2053b1a4c9e4..8b582174b1f9 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1526,6 +1526,9 @@ static const struct k_clock * const posix_clocks[] = { [CLOCK_REALTIME_ALARM] = &alarm_clock, [CLOCK_BOOTTIME_ALARM] = &alarm_clock, [CLOCK_TAI] = &clock_tai, +#ifdef CONFIG_POSIX_AUX_CLOCKS + [CLOCK_AUX ... CLOCK_AUX_LAST] = &clock_aux, +#endif }; static const struct k_clock *clockid_to_kclock(const clockid_t id) diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h index 61906f0688c1..7f259e845d24 100644 --- a/kernel/time/posix-timers.h +++ b/kernel/time/posix-timers.h @@ -41,6 +41,7 @@ extern const struct k_clock clock_posix_dynamic; extern const struct k_clock clock_process; extern const struct k_clock clock_thread; extern const struct k_clock alarm_clock; +extern const struct k_clock clock_aux; void posix_timer_queue_signal(struct k_itimer *timr); diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index c7d2913e68c3..10c6e37dc0dc 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -2655,6 +2655,7 @@ EXPORT_SYMBOL(hardpps); #endif /* CONFIG_NTP_PPS */ #ifdef CONFIG_POSIX_AUX_CLOCKS +#include "posix-timers.h" /* * Bitmap for the activated auxiliary timekeepers to allow lockless quick @@ -2749,6 +2750,26 @@ bool ktime_get_aux_ts64(clockid_t id, struct timespec64 *ts) } EXPORT_SYMBOL_GPL(ktime_get_aux_ts64); +static int aux_get_res(clockid_t id, struct timespec64 *tp) +{ + if (!clockid_aux_valid(id)) + return -ENODEV; + + tp->tv_sec = 0; + tp->tv_nsec = 1; + return 0; +} + +static int aux_get_timespec(clockid_t id, struct timespec64 *tp) +{ + return ktime_get_aux_ts64(id, tp) ? 0 : -ENODEV; +} + +const struct k_clock clock_aux = { + .clock_getres = aux_get_res, + .clock_get_timespec = aux_get_timespec, +}; + static __init void tk_aux_setup(void) { for (int i = TIMEKEEPER_AUX_FIRST; i <= TIMEKEEPER_AUX_LAST; i++) |