blob: 87e0992564f242f4aa6a0c0d190e0700deef7fd2 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*
* You SHOULD NOT be including this unless you're vsyscall
* handling code or timekeeping internal code!
*/
#ifndef _LINUX_TIMEKEEPER_INTERNAL_H
#define _LINUX_TIMEKEEPER_INTERNAL_H
#include <linux/clocksource.h>
#include <linux/jiffies.h>
#include <linux/time.h>
/*
* Structure holding internal timekeeping values.
*
* Note: wall_to_monotonic is what we need to add to xtime (or xtime
* corrected for sub jiffie times) to get to monotonic time.
* Monotonic is pegged at zero at system boot time, so
* wall_to_monotonic will be negative, however, we will ALWAYS keep
* the tv_nsec part positive so we can use the usual normalization.
*
* wall_to_monotonic is moved after resume from suspend for the
* monotonic time not to jump. We need to add total_sleep_time to
* wall_to_monotonic to get the real boot based time offset.
*
* - wall_to_monotonic is no longer the boot time, getboottime must be
* used instead.
*/
struct timekeeper {
/* Current clocksource used for timekeeping. */
struct clocksource *clock;
/* NTP adjusted clock multiplier */
u32 mult;
/* The shift value of the current clocksource. */
u32 shift;
/* Clock shifted nano seconds */
u64 xtime_nsec;
/* Monotonic base time */
ktime_t base_mono;
/* Current CLOCK_REALTIME time in seconds */
u64 xtime_sec;
/* CLOCK_REALTIME to CLOCK_MONOTONIC offset */
struct timespec64 wall_to_monotonic;
/* Offset clock monotonic -> clock realtime */
ktime_t offs_real;
/* Offset clock monotonic -> clock boottime */
ktime_t offs_boot;
/* Offset clock monotonic -> clock tai */
ktime_t offs_tai;
/* time spent in suspend */
struct timespec64 total_sleep_time;
/* The current UTC to TAI offset in seconds */
s32 tai_offset;
/* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */
struct timespec64 raw_time;
/* Number of clock cycles in one NTP interval. */
cycle_t cycle_interval;
/* Last cycle value (also stored in clock->cycle_last) */
cycle_t cycle_last;
/* Number of clock shifted nano seconds in one NTP interval. */
u64 xtime_interval;
/* shifted nano seconds left over when rounding cycle_interval */
s64 xtime_remainder;
/* Raw nano seconds accumulated per NTP interval. */
u32 raw_interval;
/*
* Difference between accumulated time and NTP time in ntp
* shifted nano seconds.
*/
s64 ntp_error;
/*
* Shift conversion between clock shifted nano seconds and
* ntp shifted nano seconds.
*/
u32 ntp_error_shift;
};
#ifdef CONFIG_GENERIC_TIME_VSYSCALL
extern void update_vsyscall(struct timekeeper *tk);
extern void update_vsyscall_tz(void);
#elif defined(CONFIG_GENERIC_TIME_VSYSCALL_OLD)
extern void update_vsyscall_old(struct timespec *ts, struct timespec *wtm,
struct clocksource *c, u32 mult);
extern void update_vsyscall_tz(void);
#else
static inline void update_vsyscall(struct timekeeper *tk)
{
}
static inline void update_vsyscall_tz(void)
{
}
#endif
#endif /* _LINUX_TIMEKEEPER_INTERNAL_H */
|
