[CPUFREQ] p4-clockmod: fix support for Core

Support for Core CPUs was broken in two ways in speedstep-lib: for x86_64,
we missed a MSR definition; for both x86_64 and i386, the FSB calculation
was wrong by four (it's a quad-pumped bus). Also increase the accuracy
of the calculation.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/asm-x86_64/msr.h b/include/asm-x86_64/msr.h
index e61582288737..207fed998a0b 100644
--- a/include/asm-x86_64/msr.h
+++ b/include/asm-x86_64/msr.h
@@ -189,6 +189,7 @@ static inline unsigned int cpuid_edx(unsigned int op)
 
 #define MSR_IA32_PERFCTR0      0xc1
 #define MSR_IA32_PERFCTR1      0xc2
+#define MSR_FSB_FREQ            0xcd
 
 #define MSR_MTRRcap             0x0fe
 #define MSR_IA32_BBL_CR_CTL        0x119