linux-kernel - [PATCH 07/10] perf/x86/intel/uncore: Support die scope counters on CLX-AP

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Date:   Tue, 19 Feb 2019 12:00:08 -0800
From:   kan.liang@...ux.intel.com
To:     peterz@...radead.org, tglx@...utronix.de, acme@...nel.org,
        mingo@...hat.com, x86@...nel.org, linux-kernel@...r.kernel.org
Cc:     len.brown@...el.com, jolsa@...hat.com, namhyung@...nel.org,
        eranian@...gle.com, ak@...ux.intel.com,
        Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH 07/10] perf/x86/intel/uncore: Support die scope counters on CLX-AP

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

CLX-AP has the same uncore counters as SKX, but they are die scope.
Add a bool variable to indicate die scope only uncore counters.

Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
---
 arch/x86/events/intel/uncore.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index f795a73..f850ab9 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -20,6 +20,8 @@ static cpumask_t uncore_cpu_mask[DOMAIN_TYPE_MAX];
 
 static unsigned int uncore_domain_type_mask;
 
+static bool die_only;
+
 /* constraint for the fixed counter */
 static struct event_constraint uncore_constraint_fixed =
 	EVENT_CONSTRAINT(~0ULL, 1 << UNCORE_PMC_IDX_FIXED, ~0ULL);
@@ -895,6 +897,9 @@ static int __init uncore_type_init(struct intel_uncore_type *type, bool setid)
 	if (!pmus)
 		return -ENOMEM;
 
+	if (die_only)
+		type->type.type = DIE_DOMAIN;
+
 	if (domain_type_init(&type->type)) {
 		kfree(pmus);
 		return -ENOMEM;
@@ -1503,6 +1508,15 @@ static int __init intel_uncore_init(void)
 		return -ENODEV;
 
 	uncore_init = (struct intel_uncore_init_fun *)id->driver_data;
+
+	/*
+	 * CLX-AP has the same uncore counters as SKX,
+	 * but they are die scope.
+	 */
+	if ((boot_cpu_data.x86_model == INTEL_FAM6_SKYLAKE_X) &&
+	    (boot_cpu_data.x86_max_dies > 1))
+		die_only = true;
+
 	if (uncore_init->pci_init) {
 		pret = uncore_init->pci_init();
 		if (!pret)
-- 
2.7.4