diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2009-08-20 17:06:25 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2009-08-31 09:35:47 +0200 |
| commit | 2d826404f0bdcac2a4dd7e3c446b70d6a3b63b78 (patch) | |
| tree | 7db2dc0fbde3a25a89f1fc1514152567f612ccde /arch/x86/kernel/tsc.c | |
| parent | 47926214d8b2bef13b2be57c500194a804f16198 (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.c | 13 |
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) { |