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Commit bb9fbe1b authored by Kan Liang's avatar Kan Liang Committed by Thomas Gleixner
Browse files

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



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: default avatarStephane Eranian <eranian@google.com>
Signed-off-by: default avatarKan Liang <kan.liang@intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarStephane 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
parent 58ba4d5a

arch/x86/events/intel/uncore_snbep.c

+8 −0
Original line number Diff line number Diff line
@@ -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 = {