native_calibrate_tsc() contains a whitelist of models that have a known
TSC frequency that differs from the CPU frequency.  This patchset
switches the code from using magic numbers to using the defines in
asm/intel-family.h and adds new processors to the whitelist.

v2: peterz, fixed typo in patch 0002.  There was some question if the value
was supposed to be 25000 or 24000.  Experimenting on an 0x55 processor shows
that 25000 is correct.

Signed-off-by: Prarit Bhargava <>
Cc: Thomas Gleixner <>
Cc: Ingo Molnar <>
Cc: "H. Peter Anvin" <>
Cc: Rafael Aquini <>
Cc: "Peter Zijlstra (Intel)" <>
Cc: Andy Lutomirski <>
Cc: Len Brown <>

Prarit Bhargava (2):
  x86,tsc: Use cpu id defines from intel-family.h
  x86/tsc: Add additional Intel CPU models to crystal_khz whitelist

 arch/x86/kernel/tsc.c |   14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)


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