Add code to create event/format attributes and attribute groups for
each nest pmu.
Cc: Michael Ellerman <m...@ellerman.id.au>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Anton Blanchard <an...@samba.org>
Cc: Sukadev Bhattiprolu <suka...@linux.vnet.ibm.com>
Cc: Daniel Axtens <d...@axtens.net>
Cc: Stephane Eranian <eran...@google.com>
Signed-off-by: Madhavan Srinivasan <ma...@linux.vnet.ibm.com>
---
arch/powerpc/perf/nest-pmu.c | 61 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)
diff --git a/arch/powerpc/perf/nest-pmu.c b/arch/powerpc/perf/nest-pmu.c
index 292fc2b91ed0..4a74ffb97741 100644
--- a/arch/powerpc/perf/nest-pmu.c
+++ b/arch/powerpc/perf/nest-pmu.c
@@ -13,6 +13,17 @@
static struct perchip_nest_info p8_nest_perchip_info[P8_NEST_MAX_CHIPS];
static struct nest_pmu *per_nest_pmu_arr[P8_NEST_MAX_PMUS];
+PMU_FORMAT_ATTR(event, "config:0-20");
+static struct attribute *p8_nest_format_attrs[] = {
+ &format_attr_event.attr,
+ NULL,
+};
+
+static struct attribute_group p8_nest_format_group = {
+ .name = "format",
+ .attrs = p8_nest_format_attrs,
+};
+
static int nest_event_info(char *name, struct nest_ima_events *p8_events)
{
char *buf;
@@ -60,6 +71,53 @@ static int nest_event_info_val(char *name, u32 val,
return 0;
}
+/*
+ * Populate event name and string in attribute
+ */
+static struct attribute *dev_str_attr(const char *name, const char *str)
+{
+ struct perf_pmu_events_attr *attr;
+
+ attr = kzalloc(sizeof(*attr), GFP_KERNEL);
+
+ sysfs_attr_init(&attr->attr.attr);
+
+ attr->event_str = str;
+ attr->attr.attr.name = name;
+ attr->attr.attr.mode = 0444;
+ attr->attr.show = perf_event_sysfs_show;
+
+ return &attr->attr.attr;
+}
+
+static int update_events_in_group(
+ struct nest_ima_events *p8_events, int idx, struct nest_pmu *pmu)
+{
+ struct attribute_group *attr_group;
+ struct attribute **attrs;
+ int i;
+
+ /* Allocate memory for attribute group */
+ attr_group = kzalloc(sizeof(*attr_group), GFP_KERNEL);
+ if (!attr_group)
+ return -ENOMEM;
+
+ /* Allocate memory for attributes */
+ attrs = kzalloc((sizeof(struct attribute *) * (idx + 1)), GFP_KERNEL);
+ if (!attrs)
+ return -ENOMEM;
+
+ attr_group->name = "events";
+ attr_group->attrs = attrs;
+
+ for (i = 0; i < idx; i++, p8_events++)
+ attrs[i] = dev_str_attr((char *)p8_events->ev_name,
+ (char *)p8_events->ev_value);
+
+ pmu->attr_groups[0] = attr_group;
+ return 0;
+}
+
static int nest_pmu_create(struct device_node *dev, int pmu_index)
{
struct nest_ima_events *p8_events;
@@ -105,6 +163,7 @@ static int nest_pmu_create(struct device_node *dev, int
pmu_index)
/* Save the name to register it later */
sprintf(buf, "Nest_%s", (char *)pp->value);
pmu_ptr->pmu.name = (char *)buf;
+ pmu_ptr->attr_groups[1] = &p8_nest_format_group;
continue;
}
@@ -136,6 +195,8 @@ static int nest_pmu_create(struct device_node *dev, int
pmu_index)
idx++;
}
+ update_events_in_group(p8_events, idx, pmu_ptr);
+
return 0;
}
--
1.9.1
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