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perf/x86/intel/uncore: Add event constraint for BDX PCU

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Event select bit 7 'Use Occupancy' in PCU Box is not available for
counter 0 on BDX

Add a constraint to fix it.

Reported-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: ak@linux.intel.com
Link: https://lkml.kernel.org/r/1510668400-301000-1-git-send-email-kan.liang@intel.com
This commit is contained in:
Kan Liang 2017-11-14 06:06:40 -08:00 committed by Thomas Gleixner
parent 58ba4d5a25
commit bb9fbe1b57
1 changed files with 8 additions and 0 deletions
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8
arch/x86/events/intel/uncore_snbep.c
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@ -3035,11 +3035,19 @@ static struct intel_uncore_type *bdx_msr_uncores[] = {
NULL,
};
/* Bit 7 'Use Occupancy' is not available for counter 0 on BDX */
static struct event_constraint bdx_uncore_pcu_constraints[] = {
EVENT_CONSTRAINT(0x80, 0xe, 0x80),
EVENT_CONSTRAINT_END
};
void bdx_uncore_cpu_init(void)
{
if (bdx_uncore_cbox.num_boxes > boot_cpu_data.x86_max_cores)
bdx_uncore_cbox.num_boxes = boot_cpu_data.x86_max_cores;
uncore_msr_uncores = bdx_msr_uncores;
hswep_uncore_pcu.constraints = bdx_uncore_pcu_constraints;
}
static struct intel_uncore_type bdx_uncore_ha = {