diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2020-02-13 16:26:47 +0300 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2020-03-30 00:29:08 +0300 |
| commit | 88ce642492339f49a0b391af40e5798c08948e49 (patch) | |
| tree | 157046746a6ff7554cc0b843daad22519ad88e74 /arch/um/include/linux | |
| parent | dd9ada5627245a3441ebde00736dd63d09acc222 (diff) | |
| download | linux-88ce642492339f49a0b391af40e5798c08948e49.tar.xz | |
um: Implement time-travel=ext
This implements synchronized time-travel mode which - using a special
application on a unix socket - lets multiple machines take part in a
time-travelling simulation together.
The protocol for the unix domain socket is defined in the new file
include/uapi/linux/um_timetravel.h.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/include/linux')
| -rw-r--r-- | arch/um/include/linux/time-internal.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/um/include/linux/time-internal.h b/arch/um/include/linux/time-internal.h index eb1f84616edb..e21655926f08 100644 --- a/arch/um/include/linux/time-internal.h +++ b/arch/um/include/linux/time-internal.h @@ -15,6 +15,7 @@ enum time_travel_mode { TT_MODE_OFF, TT_MODE_BASIC, TT_MODE_INFCPU, + TT_MODE_EXTERNAL, }; #ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT @@ -35,6 +36,24 @@ time_travel_set_event_fn(struct time_travel_event *e, { e->fn = fn; } + +void __time_travel_propagate_time(void); + +static inline void time_travel_propagate_time(void) +{ + if (time_travel_mode == TT_MODE_EXTERNAL) + __time_travel_propagate_time(); +} + +void __time_travel_wait_readable(int fd); + +static inline void time_travel_wait_readable(int fd) +{ + if (time_travel_mode == TT_MODE_EXTERNAL) + __time_travel_wait_readable(fd); +} + +void time_travel_add_irq_event(struct time_travel_event *e); #else struct time_travel_event { }; @@ -47,5 +66,13 @@ static inline void time_travel_sleep(unsigned long long duration) /* this is a macro so the event/function need not exist */ #define time_travel_set_event_fn(e, fn) do {} while (0) + +static inline void time_travel_propagate_time(void) +{ +} + +static inline void time_travel_wait_readable(int fd) +{ +} #endif /* CONFIG_UML_TIME_TRAVEL_SUPPORT */ #endif /* __TIMER_INTERNAL_H__ */ |