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perf/x86: Detect number of instances of uncore CBox

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The CBox manages the interface between the core and the LLC, so
the instances of uncore CBox is equal to number of cores.

Reported-by: Andrew Cooks <acooks@gmail.com>
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1341381616-12229-4-git-send-email-zheng.z.yan@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Yan, Zheng 2012-07-04 14:00:14 +08:00 committed by Ingo Molnar
parent 3b19e4c98c
commit 4208969724
1 changed files with 6 additions and 1 deletions
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7
arch/x86/kernel/cpu/perf_event_intel_uncore.c
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@ -1605,8 +1605,9 @@ static void __init uncore_cpu_setup(void *dummy)
static int __init uncore_cpu_init(void)
{
int ret, cpu;
int ret, cpu, max_cores;
max_cores = boot_cpu_data.x86_max_cores;
switch (boot_cpu_data.x86_model) {
case 26: /* Nehalem */
case 30:
@ -1615,9 +1616,13 @@ static int __init uncore_cpu_init(void)
msr_uncores = nhm_msr_uncores;
break;
case 42: /* Sandy Bridge */
if (snb_uncore_cbox.num_boxes > max_cores)
snb_uncore_cbox.num_boxes = max_cores;
msr_uncores = snb_msr_uncores;
break;
case 45: /* Sandy Birdge-EP */
if (snbep_uncore_cbox.num_boxes > max_cores)
snbep_uncore_cbox.num_boxes = max_cores;
msr_uncores = snbep_msr_uncores;
break;
default: