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https://github.com/Fishwaldo/linux-bl808.git
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88ce642492
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>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2012 - 2014 Cisco Systems
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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*/
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#ifndef __TIMER_INTERNAL_H__
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#define __TIMER_INTERNAL_H__
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#include <linux/list.h>
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#define TIMER_MULTIPLIER 256
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#define TIMER_MIN_DELTA 500
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enum time_travel_mode {
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TT_MODE_OFF,
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TT_MODE_BASIC,
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TT_MODE_INFCPU,
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TT_MODE_EXTERNAL,
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};
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#ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT
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struct time_travel_event {
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unsigned long long time;
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void (*fn)(struct time_travel_event *d);
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struct list_head list;
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bool pending, onstack;
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};
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extern enum time_travel_mode time_travel_mode;
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void time_travel_sleep(unsigned long long duration);
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static inline void
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time_travel_set_event_fn(struct time_travel_event *e,
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void (*fn)(struct time_travel_event *d))
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{
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e->fn = fn;
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}
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void __time_travel_propagate_time(void);
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static inline void time_travel_propagate_time(void)
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{
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if (time_travel_mode == TT_MODE_EXTERNAL)
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__time_travel_propagate_time();
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}
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void __time_travel_wait_readable(int fd);
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static inline void time_travel_wait_readable(int fd)
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{
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if (time_travel_mode == TT_MODE_EXTERNAL)
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__time_travel_wait_readable(fd);
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}
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void time_travel_add_irq_event(struct time_travel_event *e);
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#else
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struct time_travel_event {
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};
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#define time_travel_mode TT_MODE_OFF
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static inline void time_travel_sleep(unsigned long long duration)
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{
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}
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/* this is a macro so the event/function need not exist */
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#define time_travel_set_event_fn(e, fn) do {} while (0)
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static inline void time_travel_propagate_time(void)
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{
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}
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static inline void time_travel_wait_readable(int fd)
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{
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}
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#endif /* CONFIG_UML_TIME_TRAVEL_SUPPORT */
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#endif /* __TIMER_INTERNAL_H__ */
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