Messages in this thread Patch in this message | | | From | kan.liang@intel ... | Subject | [PATCH] perf/x86/intel/uncore: add event constraint for BDX PCU | Date | Tue, 14 Nov 2017 06:06:40 -0800 |
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From: Kan Liang <kan.liang@intel.com>
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> Tested-by: Stephane Eranian <eranian@google.com> --- arch/x86/events/intel/uncore_snbep.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c index d5b4398..3991032 100644 --- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -3034,11 +3034,19 @@ 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 = { -- 2.4.3
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