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| author | bryanv <bryanv@FreeBSD.org> | 2015-02-04 08:33:04 +0000 |
|---|---|---|
| committer | bryanv <bryanv@FreeBSD.org> | 2015-02-04 08:33:04 +0000 |
| commit | 7a68cf4e596dc6f95b785e75b92299a43a3d3399 (patch) | |
| tree | 0380d0a6f9ddb290d0e2a2fc511afdb91ef775e3 /sys/x86/include/pvclock.h | |
| parent | 25ce9181cfd88fce73c121eaab1a8e5237d61dda (diff) | |
| download | FreeBSD-src-7a68cf4e596dc6f95b785e75b92299a43a3d3399.zip FreeBSD-src-7a68cf4e596dc6f95b785e75b92299a43a3d3399.tar.gz | |
Add interface to derive a TSC frequency from the pvclock
This can later use this to determine the TSC frequency like is done with
VMware, instead of using a DELAY loop that is not always accurate in an VM.
MFC after: 1 month
Diffstat (limited to 'sys/x86/include/pvclock.h')
| -rw-r--r-- | sys/x86/include/pvclock.h | 1 |
1 files changed, 1 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); |
