diff options
| author | Livio Soares <livio@eecg.toronto.edu> | 2010-06-03 15:00:31 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-06-08 20:27:04 +0200 |
| commit | e768aee89c687a50e6a2110e30c5cae1fbf0d2da (patch) | |
| tree | f01b961d57317d56820c499557b97b903700c93f /arch/x86 | |
| parent | becf6c97a3abaefb2f01415c0b908a268c92b2c3 (diff) | |
perf, x86: Small fix to cpuid10_edx
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>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/perf_event.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index 254883d0c7e..6ed3ae4f548 100644 --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -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; }; |