diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-13 19:07:38 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-13 19:07:38 -0800 |
commit | 99306dfc067e6098365d395168b6fd5db3095292 (patch) | |
tree | f3da80eba0c633da69bcad47df565f06ff075947 /arch/x86/include/asm/tsc.h | |
parent | 3643b7e05b16a9fc4077ec56b655a1f8547d259c (diff) | |
parent | 120fc3fbb7787fb70240190cc9c113d1f6523c42 (diff) | |
download | linux-stable-99306dfc067e6098365d395168b6fd5db3095292.tar.gz linux-stable-99306dfc067e6098365d395168b6fd5db3095292.tar.bz2 linux-stable-99306dfc067e6098365d395168b6fd5db3095292.zip |
Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 timer updates from Thomas Gleixner:
"These updates are related to TSC handling:
- Support platforms which have synchronized TSCs but the boot CPU has
a non zero TSC_ADJUST value, which is considered a firmware bug on
normal systems.
This applies to HPE/SGI UV platforms where the platform firmware
uses TSC_ADJUST to ensure TSC synchronization across a huge number
of sockets, but due to power on timings the boot CPU cannot be
guaranteed to have a zero TSC_ADJUST register value.
- Fix the ordering of udelay calibration and kvmclock_init()
- Cleanup the udelay and calibration code"
* 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/tsc: Mark cyc2ns_init() and detect_art() __init
x86/platform/UV: Mark tsc_check_sync as an init function
x86/tsc: Make CONFIG_X86_TSC=n build work again
x86/platform/UV: Add check of TSC state set by UV BIOS
x86/tsc: Provide a means to disable TSC ART
x86/tsc: Drastically reduce the number of firmware bug warnings
x86/tsc: Skip TSC test and error messages if already unstable
x86/tsc: Add option that TSC on Socket 0 being non-zero is valid
x86/timers: Move simple_udelay_calibration() past kvmclock_init()
x86/timers: Make recalibrate_cpu_khz() void
x86/timers: Move the simple udelay calibration to tsc.h
Diffstat (limited to 'arch/x86/include/asm/tsc.h')
-rw-r--r-- | arch/x86/include/asm/tsc.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/include/asm/tsc.h b/arch/x86/include/asm/tsc.h index 8da0efb13544..cf5d53c3f9ea 100644 --- a/arch/x86/include/asm/tsc.h +++ b/arch/x86/include/asm/tsc.h @@ -32,15 +32,22 @@ static inline cycles_t get_cycles(void) extern struct system_counterval_t convert_art_to_tsc(u64 art); +extern void tsc_early_delay_calibrate(void); extern void tsc_init(void); extern void mark_tsc_unstable(char *reason); extern int unsynchronized_tsc(void); extern int check_tsc_unstable(void); +extern void mark_tsc_async_resets(char *reason); extern unsigned long native_calibrate_cpu(void); extern unsigned long native_calibrate_tsc(void); extern unsigned long long native_sched_clock_from_tsc(u64 tsc); extern int tsc_clocksource_reliable; +#ifdef CONFIG_X86_TSC +extern bool tsc_async_resets; +#else +# define tsc_async_resets false +#endif /* * Boot-time check whether the TSCs are synchronized across |