uapi/linux/um_timetravel.h

10  * struct um_timetravel_msg - UM time travel message
37 	 * @time: time in nanoseconds
39 	__u64 time;  member
63  * enum um_timetravel_start_ack - ack-time mask for start message
78 	 *	this usually doesn't carry any data in the 'time' field
86 	 * @UM_TIMETRAVEL_START: initialize the connection, the time
93 	 * @UM_TIMETRAVEL_REQUEST: request to run at the given time
101 	 *	interrupts); the time field is ignored. The calendar must process
109 	 * @UM_TIMETRAVEL_GET: return the current time from the calendar in the
110 	 *	ACK message, the time in the request message is ignored
116 	 * @UM_TIMETRAVEL_UPDATE: time update to the calendar, must be sent e.g.
123 	 * @UM_TIMETRAVEL_RUN: run time request granted, current time is in
124 	 *	the time field
130 	 * @UM_TIMETRAVEL_FREE_UNTIL: Enable free-running until the given time,
133 	 *	time.
136 	 *	wraparound semantics for the time field.
142 	 * @UM_TIMETRAVEL_GET_TOD: Return time of day, typically used once at
143 	 *	boot by the virtual machines to get a synchronized time from
164  * enum um_timetravel_schedshm_cap - time travel capabilities of every client
171 	 * @UM_TIMETRAVEL_SCHEDSHM_CAP_TIME_SHARE: client can read current time
172 	 *	update internal time request to shared memory and read
180  * enum um_timetravel_schedshm_flags - time travel flags of every client
195  * DOC: Time travel shared memory overview
197  * The main purpose of the shared memory is to avoid all time travel message
198  * that don't need any action, for example current time can be held in shared
200  * in order to know what's the time.
203  * creates the shared memory space, all time values are absolute to controller
204  * time. So first time client connects to shared memory mode it should take the
207  * with the controller must happen in the controller time domain, including any
209  * handle an offset and make the clients think they start at time zero.)
217  * it at what time, defined in the structure fields.
224  * union um_timetravel_schedshm_client - UM time travel client struct
235  * @req_time: request time to run, set by client on every request it needs.
249  * struct um_timetravel_schedshm - UM time travel shared memory struct
267  * current_time: Current time, can only be set by the client in running state