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| Commit | Line | Data |
|---|---|---|
| 79bf2bb3 TG |
1 | # |
| 2 | # Timer subsystem related configuration options | |
| 3 | # | |
| 3872c48b | 4 | |
| b5e498ad TG |
5 | # Options selectable by arch Kconfig |
| 6 | ||
| 7 | # Watchdog function for clocksources to detect instabilities | |
| 8 | config CLOCKSOURCE_WATCHDOG | |
| 9 | bool | |
| 10 | ||
| 11 | # Architecture has extra clocksource data | |
| 12 | config ARCH_CLOCKSOURCE_DATA | |
| 13 | bool | |
| 14 | ||
| 05ad717c | 15 | # Platforms has a persistent clock |
| 6f16eebe | 16 | config ALWAYS_USE_PERSISTENT_CLOCK |
| 05ad717c FT |
17 | bool |
| 18 | default n | |
| 19 | ||
| 576094b7 JS |
20 | # Timekeeping vsyscall support |
| 21 | config GENERIC_TIME_VSYSCALL | |
| 22 | bool | |
| 23 | ||
| b5e498ad | 24 | # Timekeeping vsyscall support |
| 70639421 | 25 | config GENERIC_TIME_VSYSCALL_OLD |
| b5e498ad TG |
26 | bool |
| 27 | ||
| 28 | # ktime_t scalar 64bit nsec representation | |
| 29 | config KTIME_SCALAR | |
| 30 | bool | |
| 31 | ||
| 32 | # Old style timekeeping | |
| 33 | config ARCH_USES_GETTIMEOFFSET | |
| 34 | bool | |
| 35 | ||
| 36 | # The generic clock events infrastructure | |
| 37 | config GENERIC_CLOCKEVENTS | |
| 38 | bool | |
| 39 | ||
| 764e0da1 TG |
40 | # Migration helper. Builds, but does not invoke |
| 41 | config GENERIC_CLOCKEVENTS_BUILD | |
| 42 | bool | |
| 43 | default y | |
| 44 | depends on GENERIC_CLOCKEVENTS | |
| 45 | ||
| 12ad1000 MR |
46 | # Architecture can handle broadcast in a driver-agnostic way |
| 47 | config ARCH_HAS_TICK_BROADCAST | |
| 48 | bool | |
| 49 | ||
| b5e498ad TG |
50 | # Clockevents broadcasting infrastructure |
| 51 | config GENERIC_CLOCKEVENTS_BROADCAST | |
| 52 | bool | |
| 53 | depends on GENERIC_CLOCKEVENTS | |
| 54 | ||
| 764e0da1 TG |
55 | # Automatically adjust the min. reprogramming time for |
| 56 | # clock event device | |
| 57 | config GENERIC_CLOCKEVENTS_MIN_ADJUST | |
| 58 | bool | |
| 59 | ||
| b5e498ad TG |
60 | # Generic update of CMOS clock |
| 61 | config GENERIC_CMOS_UPDATE | |
| 62 | bool | |
| 764e0da1 TG |
63 | |
| 64 | if GENERIC_CLOCKEVENTS | |
| 65 | menu "Timers subsystem" | |
| 66 | ||
| 67 | # Core internal switch. Selected by NO_HZ / HIGH_RES_TIMERS. This is | |
| 68 | # only related to the tick functionality. Oneshot clockevent devices | |
| 69 | # are supported independ of this. | |
| 70 | config TICK_ONESHOT | |
| 71 | bool | |
| 72 | ||
| 73 | config NO_HZ | |
| 74 | bool "Tickless System (Dynamic Ticks)" | |
| 75 | depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS | |
| 76 | select TICK_ONESHOT | |
| 77 | help | |
| 78 | This option enables a tickless system: timer interrupts will | |
| 79 | only trigger on an as-needed basis both when the system is | |
| 80 | busy and when the system is idle. | |
| 81 | ||
| 82 | config HIGH_RES_TIMERS | |
| 83 | bool "High Resolution Timer Support" | |
| 84 | depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS | |
| 85 | select TICK_ONESHOT | |
| 86 | help | |
| 87 | This option enables high resolution timer support. If your | |
| 88 | hardware is not capable then this option only increases | |
| 89 | the size of the kernel image. | |
| 90 | ||
| 91 | endmenu | |
| 92 | endif |