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authorThomas Gleixner <tglx@linutronix.de>2009-08-20 17:06:25 +0200
committerThomas Gleixner <tglx@linutronix.de>2009-08-31 09:35:47 +0200
commit2d826404f0bdcac2a4dd7e3c446b70d6a3b63b78 (patch)
tree7db2dc0fbde3a25a89f1fc1514152567f612ccde /arch/x86/kernel/tsc.c
parent47926214d8b2bef13b2be57c500194a804f16198 (diff)
x86: Move tsc_calibration to x86_init_ops
TSC calibration is modified by the vmware hypervisor and paravirt by separate means. Moorestown wants to add its own calibration routine as well. So make calibrate_tsc a proper x86_init_ops function and override it by paravirt or by the early setup of the vmware hypervisor. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/tsc.c')
-rw-r--r--arch/x86/kernel/tsc.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 97a0bcbad10..9917632a8b4 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -18,6 +18,7 @@
#include <asm/delay.h>
#include <asm/hypervisor.h>
#include <asm/nmi.h>
+#include <asm/x86_init.h>
unsigned int __read_mostly cpu_khz; /* TSC clocks / usec, not used here */
EXPORT_SYMBOL(cpu_khz);
@@ -401,15 +402,9 @@ unsigned long native_calibrate_tsc(void)
{
u64 tsc1, tsc2, delta, ref1, ref2;
unsigned long tsc_pit_min = ULONG_MAX, tsc_ref_min = ULONG_MAX;
- unsigned long flags, latch, ms, fast_calibrate, hv_tsc_khz;
+ unsigned long flags, latch, ms, fast_calibrate;
int hpet = is_hpet_enabled(), i, loopmin;
- hv_tsc_khz = get_hypervisor_tsc_freq();
- if (hv_tsc_khz) {
- printk(KERN_INFO "TSC: Frequency read from the hypervisor\n");
- return hv_tsc_khz;
- }
-
local_irq_save(flags);
fast_calibrate = quick_pit_calibrate();
local_irq_restore(flags);
@@ -567,7 +562,7 @@ int recalibrate_cpu_khz(void)
unsigned long cpu_khz_old = cpu_khz;
if (cpu_has_tsc) {
- tsc_khz = calibrate_tsc();
+ tsc_khz = x86_platform.calibrate_tsc();
cpu_khz = tsc_khz;
cpu_data(0).loops_per_jiffy =
cpufreq_scale(cpu_data(0).loops_per_jiffy,
@@ -917,7 +912,7 @@ void __init tsc_init(void)
if (!cpu_has_tsc)
return;
- tsc_khz = calibrate_tsc();
+ tsc_khz = x86_platform.calibrate_tsc();
cpu_khz = tsc_khz;
if (!tsc_khz) {