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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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9094c72c3d
To support auxiliary timekeeping and the related user space interfaces, it's required to define a clock ID range for them. Reserve 8 auxiliary clock IDs after the regular timekeeping clock ID space. This is the maximum number of auxiliary clocks the kernel can support. The actual number of supported clocks depends obviously on the presence of related devices and might be constraint by the available VDSO space. Add the corresponding timekeeper IDs as well. Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: John Stultz <jstultz@google.com> Link: https://lore.kernel.org/all/20250519083025.905800695@linutronix.de
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_LINUX_TIME_H
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#define _UAPI_LINUX_TIME_H
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#include <linux/types.h>
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#include <linux/time_types.h>
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#ifndef __KERNEL__
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#ifndef _STRUCT_TIMESPEC
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#define _STRUCT_TIMESPEC
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struct timespec {
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__kernel_old_time_t tv_sec; /* seconds */
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long tv_nsec; /* nanoseconds */
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};
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#endif
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struct timeval {
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__kernel_old_time_t tv_sec; /* seconds */
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__kernel_suseconds_t tv_usec; /* microseconds */
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};
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struct itimerspec {
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struct timespec it_interval;/* timer period */
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struct timespec it_value; /* timer expiration */
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};
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struct itimerval {
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struct timeval it_interval;/* timer interval */
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struct timeval it_value; /* current value */
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};
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#endif
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struct timezone {
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int tz_minuteswest; /* minutes west of Greenwich */
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int tz_dsttime; /* type of dst correction */
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};
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/*
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* Names of the interval timers, and structure
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* defining a timer setting:
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*/
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#define ITIMER_REAL 0
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#define ITIMER_VIRTUAL 1
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#define ITIMER_PROF 2
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/*
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* The IDs of the various system clocks (for POSIX.1b interval timers):
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*/
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#define CLOCK_REALTIME 0
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#define CLOCK_MONOTONIC 1
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#define CLOCK_PROCESS_CPUTIME_ID 2
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#define CLOCK_THREAD_CPUTIME_ID 3
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#define CLOCK_MONOTONIC_RAW 4
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#define CLOCK_REALTIME_COARSE 5
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#define CLOCK_MONOTONIC_COARSE 6
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#define CLOCK_BOOTTIME 7
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#define CLOCK_REALTIME_ALARM 8
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#define CLOCK_BOOTTIME_ALARM 9
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/*
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* The driver implementing this got removed. The clock ID is kept as a
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* place holder. Do not reuse!
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*/
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#define CLOCK_SGI_CYCLE 10
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#define CLOCK_TAI 11
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#define MAX_CLOCKS 16
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/*
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* AUX clock support. AUXiliary clocks are dynamically configured by
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* enabling a clock ID. These clock can be steered independently of the
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* core timekeeper. The kernel can support up to 8 auxiliary clocks, but
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* the actual limit depends on eventual architecture constraints vs. VDSO.
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*/
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#define CLOCK_AUX MAX_CLOCKS
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#define MAX_AUX_CLOCKS 8
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#define CLOCK_AUX_LAST (CLOCK_AUX + MAX_AUX_CLOCKS - 1)
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#define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
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#define CLOCKS_MONO CLOCK_MONOTONIC
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/*
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* The various flags for setting POSIX.1b interval timers:
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*/
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#define TIMER_ABSTIME 0x01
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#endif /* _UAPI_LINUX_TIME_H */
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