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| author |   Zachary Amsden <zach@vmware.com> | 2007-03-05 00:30:36 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-03-05 07:57:52 -0800 |
| commit | 1182d8528b620c23d043bccbbef092b42062960a (patch) | |
| tree | 3df690a1a731811f8fecda06cb785a5a7b06d4d0 /include/asm-i386/vmi_time.h | |
| parent | [PATCH] vmi: sched clock paravirt op fix (diff) | |
| download | linux-dev-1182d8528b620c23d043bccbbef092b42062960a.tar.xz linux-dev-1182d8528b620c23d043bccbbef092b42062960a.zip | |
[PATCH] vmi: cpu cycles fix
In order to share the common code in tsc.c which does CPU Khz calibration, we
need to make an accurate value of CPU speed available to the tsc.c code. This
value loses a lot of precision in a VM because of the timing differences with
real hardware, but we need it to be as precise as possible so the guest can
make accurate time calculations with the cycle counters.
Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | include/asm-i386/vmi_time.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-i386/vmi_time.h b/include/asm-i386/vmi_time.h index f59c35d37352..1f971eb7f71e 100644 --- a/include/asm-i386/vmi_time.h +++ b/include/asm-i386/vmi_time.h @@ -50,6 +50,7 @@ extern void __init vmi_time_init(void); extern unsigned long vmi_get_wallclock(void); extern int vmi_set_wallclock(unsigned long now); extern unsigned long long vmi_get_sched_cycles(void); +extern unsigned long vmi_cpu_khz(void); #ifdef CONFIG_X86_LOCAL_APIC extern void __init vmi_timer_setup_boot_alarm(void); |