diff options
| -rw-r--r-- | sys/x86/include/pvclock.h | 1 | ||||
| -rw-r--r-- | sys/x86/x86/pvclock.c | 15 |
2 files changed, 16 insertions, 0 deletions
diff --git a/sys/x86/include/pvclock.h b/sys/x86/include/pvclock.h index 88a596f..402ffed 100644 --- a/sys/x86/include/pvclock.h +++ b/sys/x86/include/pvclock.h @@ -51,6 +51,7 @@ struct pvclock_wall_clock { void pvclock_resume(void); uint64_t pvclock_get_last_cycles(void); +uint64_t pvclock_tsc_freq(struct pvclock_vcpu_time_info *ti); uint64_t pvclock_get_timecount(struct pvclock_vcpu_time_info *ti); void pvclock_get_wallclock(struct pvclock_wall_clock *wc, struct timespec *ts); diff --git a/sys/x86/x86/pvclock.c b/sys/x86/x86/pvclock.c index ebc37a4..c1e6f83 100644 --- a/sys/x86/x86/pvclock.c +++ b/sys/x86/x86/pvclock.c @@ -58,6 +58,21 @@ pvclock_get_last_cycles(void) return (atomic_load_acq_64(&pvclock_last_cycles)); } +uint64_t +pvclock_tsc_freq(struct pvclock_vcpu_time_info *ti) +{ + uint64_t freq; + + freq = (1000000000ULL << 32) / ti->tsc_to_system_mul; + + if (ti->tsc_shift < 0) + freq <<= -ti->tsc_shift; + else + freq >>= ti->tsc_shift; + + return (freq); +} + /* * Scale a 64-bit delta by scaling and multiplying by a 32-bit fraction, * yielding a 64-bit result. |
