@@ -5,6 +5,7 @@
#define _ASM_X86_TSC_H
#include <asm/processor.h>
+#include <linux/time64.h>
#define NS_SCALE 10 /* 2^10, carefully chosen */
#define US_SCALE 32 /* 2^32, arbitralrily chosen */
@@ -52,6 +53,10 @@ extern int check_tsc_unstable(void);
extern int check_tsc_disabled(void);
extern unsigned long native_calibrate_tsc(void);
+extern int tsc_to_rawmono64(struct timespec64 *rawmono, cycle_t counterval);
+extern int tsc_to_realtime64(struct timespec64 *realtime, cycle_t counterval);
+extern int tsc_to_mono64(struct timespec64 *mono, cycle_t counterval);
+
extern int tsc_clocksource_reliable;
/*
@@ -979,6 +979,24 @@ static cycle_t read_tsc(struct clocksource *cs)
return (cycle_t)get_cycles();
}
+int tsc_to_rawmono64(struct timespec64 *rawmono, cycle_t counterval)
+{
+ return counter_to_rawmono64(rawmono, counterval, &clocksource_tsc);
+}
+EXPORT_SYMBOL(tsc_to_rawmono64);
+
+int tsc_to_realtime64(struct timespec64 *realtime, cycle_t counterval)
+{
+ return counter_to_realtime64(realtime, counterval, &clocksource_tsc);
+}
+EXPORT_SYMBOL(tsc_to_realtime64);
+
+int tsc_to_mono64(struct timespec64 *mono, cycle_t counterval)
+{
+ return counter_to_mono64(mono, counterval, &clocksource_tsc);
+}
+EXPORT_SYMBOL(tsc_to_mono64);
+
/*
* .mask MUST be CLOCKSOURCE_MASK(64). See comment above read_tsc()
*/
* tsc_to_rawmono64 * tsc_to_realtime64 * tsc_to_mono64 These function build on the counter_to_* time translation function specifically for TSC based system clock Signed-off-by: Christopher Hall <christopher.s.hall@intel.com> --- arch/x86/include/asm/tsc.h | 5 +++++ arch/x86/kernel/tsc.c | 18 ++++++++++++++++++ 2 files changed, 23 insertions(+)