diff options
| -rw-r--r-- | kernel/time/timekeeping.c | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 0de61315b40c..6770544f8c0e 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -58,6 +58,17 @@ static struct tk_data timekeeper_data[TIMEKEEPERS_MAX]; /* The core timekeeper */ #define tk_core (timekeeper_data[TIMEKEEPER_CORE]) +#ifdef CONFIG_POSIX_AUX_CLOCKS +static inline bool tk_get_aux_ts64(unsigned int tkid, struct timespec64 *ts) +{ + return ktime_get_aux_ts64(CLOCK_AUX + tkid - TIMEKEEPER_AUX_FIRST, ts); +} +#else +static inline bool tk_get_aux_ts64(unsigned int tkid, struct timespec64 *ts) +{ + return false; +} +#endif /* flag for if timekeeping is suspended */ int __read_mostly timekeeping_suspended; @@ -2508,7 +2519,7 @@ ktime_t ktime_get_update_offsets_now(unsigned int *cwsseq, ktime_t *offs_real, /* * timekeeping_validate_timex - Ensures the timex is ok for use in do_adjtimex */ -static int timekeeping_validate_timex(const struct __kernel_timex *txc) +static int timekeeping_validate_timex(const struct __kernel_timex *txc, bool aux_clock) { if (txc->modes & ADJ_ADJTIME) { /* singleshot must not be used with any other mode bits */ @@ -2567,6 +2578,20 @@ static int timekeeping_validate_timex(const struct __kernel_timex *txc) return -EINVAL; } + if (aux_clock) { + /* Auxiliary clocks are similar to TAI and do not have leap seconds */ + if (txc->status & (STA_INS | STA_DEL)) + return -EINVAL; + + /* No TAI offset setting */ + if (txc->modes & ADJ_TAI) + return -EINVAL; + + /* No PPS support either */ + if (txc->status & (STA_PPSFREQ | STA_PPSTIME)) + return -EINVAL; + } + return 0; } @@ -2595,17 +2620,22 @@ static int __do_adjtimex(struct tk_data *tkd, struct __kernel_timex *txc, struct adjtimex_result *result) { struct timekeeper *tks = &tkd->shadow_timekeeper; + bool aux_clock = !timekeeper_is_core_tk(tks); struct timespec64 ts; s32 orig_tai, tai; int ret; /* Validate the data before disabling interrupts */ - ret = timekeeping_validate_timex(txc); + ret = timekeeping_validate_timex(txc, aux_clock); if (ret) return ret; add_device_randomness(txc, sizeof(*txc)); - ktime_get_real_ts64(&ts); + if (!aux_clock) + ktime_get_real_ts64(&ts); + else + tk_get_aux_ts64(tkd->timekeeper.id, &ts); + add_device_randomness(&ts, sizeof(ts)); guard(raw_spinlock_irqsave)(&tkd->lock); |