perf/x86: Add cpumask for uncore pmu

This patch adds a cpumask file to the uncore pmu sysfs directory.  The
cpumask file contains one active cpu for every socket.

Signed-off-by: "Yan, Zheng" <zheng.z.yan@intel.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: "Yan, Zheng" <zheng.z.yan@intel.com>
Link: http://lkml.kernel.org/r/1347263631-23175-2-git-send-email-zheng.z.yan@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 29 insertions, 5 deletions

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index 0a5571080e74..62ec3e6af7ea 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -2341,6 +2341,27 @@ int uncore_pmu_event_init(struct perf_event *event)
         return ret;
 }
 
+static ssize_t uncore_get_attr_cpumask(struct device *dev,
+                                struct device_attribute *attr, char *buf)
+{
+        int n = cpulist_scnprintf(buf, PAGE_SIZE - 2, &uncore_cpu_mask);
+
+        buf[n++] = '\n';
+        buf[n] = '\0';
+        return n;
+}
+
+static DEVICE_ATTR(cpumask, S_IRUGO, uncore_get_attr_cpumask, NULL);
+
+static struct attribute *uncore_pmu_attrs[] = {
+        &dev_attr_cpumask.attr,
+        NULL,
+};
+
+static struct attribute_group uncore_pmu_attr_group = {
+        .attrs = uncore_pmu_attrs,
+};
+
 static int __init uncore_pmu_register(struct intel_uncore_pmu *pmu)
 {
         int ret;
@@ -2378,8 +2399,8 @@ static void __init uncore_type_exit(struct intel_uncore_type *type)
                 free_percpu(type->pmus[i].box);
         kfree(type->pmus);
         type->pmus = NULL;
-        kfree(type->attr_groups[1]);
-        type->attr_groups[1] = NULL;
+        kfree(type->events_group);
+        type->events_group = NULL;
 }
 
 static void __init uncore_types_exit(struct intel_uncore_type **types)
@@ -2431,9 +2452,10 @@ static int __init uncore_type_init(struct intel_uncore_type *type)
                 for (j = 0; j < i; j++)
                         attrs[j] = &type->event_descs[j].attr.attr;
 
-                type->attr_groups[1] = events_group;
+                type->events_group = events_group;
         }
 
+        type->pmu_group = &uncore_pmu_attr_group;
         type->pmus = pmus;
         return 0;
 fail:
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.h b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
index 5b81c1856aac..e68a4550e952 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.h
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
@@ -369,10 +369,12 @@ struct intel_uncore_type {
         struct intel_uncore_pmu *pmus;
         struct intel_uncore_ops *ops;
         struct uncore_event_desc *event_descs;
-        const struct attribute_group *attr_groups[3];
+        const struct attribute_group *attr_groups[4];
 };
 
-#define format_group attr_groups[0]
+#define pmu_group attr_groups[0]
+#define format_group attr_groups[1]
+#define events_group attr_groups[2]
 
 struct intel_uncore_ops {
         void (*init_box)(struct intel_uncore_box *);