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perf, x86: Small fix to cpuid10_edx

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Fixes to 'cpuid10_edx' to comply with Intel documentation.
According to the Intel Manual, Volume 2A, Table 3-12, the cpuid for
architecture performance monitoring returns, in EDX, two pieces of
information:

  1) Number of fixed-function counters (5 bits, not 4)
  2) Width of fixed-function counters (8 bits)

Signed-off-by: Livio Soares <livio@eecg.toronto.edu>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Livio Soares 2010-06-03 15:00:31 -04:00 committed by Ingo Molnar
parent becf6c97a3
commit e768aee89c
1 changed files with 3 additions and 2 deletions
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5
arch/x86/include/asm/perf_event.h
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@ -68,8 +68,9 @@ union cpuid10_eax {
union cpuid10_edx {
struct {
unsigned int num_counters_fixed:4;
unsigned int reserved:28;
unsigned int num_counters_fixed:5;
unsigned int bit_width_fixed:8;
unsigned int reserved:19;
} split;
unsigned int full;
};