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| author | Anna-Maria Behnsen <anna-maria@linutronix.de> | 2024-02-21 10:05:41 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-02-22 17:52:31 +0100 |
| commit | f73d9257ff3c2f415e8c342a91b7f5acfc3ce512 (patch) | |
| tree | 0bc6ef2b6358a0b6c5a50740febe4ac96ca0d965 /kernel/time/tick-internal.h | |
| parent | 70b4cf84f3acd9e72c9ea9064d82577b6f29a60b (diff) | |
| download | linux-f73d9257ff3c2f415e8c342a91b7f5acfc3ce512.tar.gz | |
timers: Add get next timer interrupt functionality for remote CPUs
To prepare for the conversion of the NOHZ timer placement to a pull at
expiry time model it's required to have functionality available getting the
next timer interrupt on a remote CPU.
Locking of the timer bases and getting the information for the next timer
interrupt functionality is split into separate functions. This is required
to be compliant with lock ordering when the new model is in place.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20240221090548.36600-14-anna-maria@linutronix.de
Diffstat (limited to 'kernel/time/tick-internal.h')
| -rw-r--r-- | kernel/time/tick-internal.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h index 47df30b871e4d5..8b0c28edbd090e 100644 --- a/kernel/time/tick-internal.h +++ b/kernel/time/tick-internal.h @@ -8,6 +8,11 @@ #include "timekeeping.h" #include "tick-sched.h" +struct timer_events { + u64 local; + u64 global; +}; + #ifdef CONFIG_GENERIC_CLOCKEVENTS # define TICK_DO_TIMER_NONE -1 @@ -154,6 +159,11 @@ extern unsigned long tick_nohz_active; extern void timers_update_nohz(void); # ifdef CONFIG_SMP extern struct static_key_false timers_migration_enabled; +extern void fetch_next_timer_interrupt_remote(unsigned long basej, u64 basem, + struct timer_events *tevt, + unsigned int cpu); +extern void timer_lock_remote_bases(unsigned int cpu); +extern void timer_unlock_remote_bases(unsigned int cpu); # endif #else /* CONFIG_NO_HZ_COMMON */ static inline void timers_update_nohz(void) { } |