linux/arch
Yasuaki Ishimatsu 754ef0cd65 x86: fix debug message of CPU clock speed
Impact: Fixes incorrect printk

LOCAL APIC is corrected by PM-Timer, when SMI occurred while LOCAL APIC is calibrated.
In this case, LOCAL APIC debug message(Boot with apic=debug) is displayed correctly,
however, CPU clock speed debug message is displayed wrongly .

When SMI occured on my machine, which has 1.6GHz CPU, CPU clock speed is displayed
3622.0205 MHz as follow.

	CPU0: Intel(R) Xeon(R) CPU            5110  @ 1.60GHz stepping 06
	Using local APIC timer interrupts.
	calibrating APIC timer ...
	... lapic delta = 3773130
	... PM timer delta = 812434
	APIC calibration not consistent with PM Timer: 226ms instead of 100ms
	APIC delta adjusted to PM-Timer: 1662420 (3773130)
	..... delta 1662420
	..... mult: 71411249
	..... calibration result: 265987
	..... CPU clock speed is 3622.0205 MHz.  =====>  here
	..... host bus clock speed is 265.0987 MHz.

This patch fixes to displaying CPU clock speed correctly as follow.

	CPU0: Intel(R) Xeon(R) CPU            5110  @ 1.60GHz stepping 06
	Using local APIC timer interrupts.
	calibrating APIC timer ...
	... lapic delta = 3773131
	... PM timer delta = 812434
	APIC calibration not consistent with PM Timer: 226ms instead of 100ms
	APIC delta adjusted to PM-Timer: 1662420 (3773131)
	TSC delta adjusted to PM-Timer: 159592409 (362220564)
	..... delta 1662420
	..... mult: 71411249
	..... calibration result: 265987
	..... CPU clock speed is 1595.0924 MHz.
	..... host bus clock speed is 265.0987 MHz.

Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-01-29 17:06:03 -08:00
..
alpha alpha: make pte_alloc_one_kernel() inline 2009-01-15 16:39:40 -08:00
arm Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-01-26 15:12:47 -08:00
avr32 eeprom: More consistent symbol names 2009-01-26 21:19:57 +01:00
blackfin eeprom: More consistent symbol names 2009-01-26 21:19:57 +01:00
cris Merge branch 'syscalls' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2009-01-14 19:58:40 -08:00
frv NOMMU: Make VMAs per MM as for MMU-mode linux 2009-01-08 12:04:47 +00:00
h8300 Merge branch 'syscalls' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2009-01-14 19:58:40 -08:00
ia64 eeprom: More consistent symbol names 2009-01-26 21:19:57 +01:00
m32r eeprom: More consistent symbol names 2009-01-26 21:19:57 +01:00
m68k m68k{nommu}: fixups after the header move 2009-01-26 10:38:43 -08:00
m68knommu Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2009-01-26 10:33:01 -08:00
mips eeprom: More consistent symbol names 2009-01-26 21:19:57 +01:00
mn10300 [CVE-2009-0029] Rename old_readdir to sys_old_readdir 2009-01-14 14:15:15 +01:00
parisc byteorder: make swab.h include asm/swab.h like a regular header 2009-01-14 19:56:50 -08:00
powerpc eeprom: More consistent symbol names 2009-01-26 21:19:57 +01:00
s390 [S390] Add missing compat system call wrappers. 2009-01-23 16:40:29 +01:00
sh Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6 2009-01-26 15:11:41 -08:00
sparc Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6 2009-01-26 15:11:41 -08:00
um mm: invoke oom-killer from page fault 2009-01-06 15:58:58 -08:00
x86 x86: fix debug message of CPU clock speed 2009-01-29 17:06:03 -08:00
xtensa byteorder: make swab.h include asm/swab.h like a regular header 2009-01-14 19:56:50 -08:00
.gitignore
Kconfig [CVE-2009-0029] System call wrapper infrastructure 2009-01-14 14:15:16 +01:00