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Subject[PATCH 4.14 125/157] perf/x86/intel/uncore: Add event constraint for BDX PCU
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kan Liang <kan.liang@intel.com>

commit bb9fbe1b57503f790dbbf9f06e72cb0fb9e60740 upstream.

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
Cc: "Jin, Yao" <yao.jin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/x86/events/intel/uncore_snbep.c | 8 ++++++++
1 file changed, 8 insertions(+)

--- a/arch/x86/events/intel/uncore_snbep.c
+++ b/arch/x86/events/intel/uncore_snbep.c
@@ -3035,11 +3035,19 @@ static struct intel_uncore_type *bdx_msr
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 = {

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