1 files changed, 25 insertions, 4 deletions

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 8e49eeef8867..808cc06cdb61 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -77,10 +77,12 @@ DEFINE_HIST_FIELD_FN(u8);
 #define HIST_KEY_SIZE_MAX	(MAX_FILTER_STR_VAL + sizeof(u64))
 
 enum hist_field_flags {
-	HIST_FIELD_FL_HITCOUNT	= 1,
-	HIST_FIELD_FL_KEY	= 2,
-	HIST_FIELD_FL_STRING	= 4,
-	HIST_FIELD_FL_HEX	= 8,
+	HIST_FIELD_FL_HITCOUNT		= 1,
+	HIST_FIELD_FL_KEY		= 2,
+	HIST_FIELD_FL_STRING		= 4,
+	HIST_FIELD_FL_HEX		= 8,
+	HIST_FIELD_FL_SYM		= 16,
+	HIST_FIELD_FL_SYM_OFFSET	= 32,
 };
 
 struct hist_trigger_attrs {
@@ -397,6 +399,10 @@ static int create_key_field(struct hist_trigger_data *hist_data,
 	if (field_str) {
 		if (strcmp(field_str, "hex") == 0)
 			flags |= HIST_FIELD_FL_HEX;
+		else if (strcmp(field_str, "sym") == 0)
+			flags |= HIST_FIELD_FL_SYM;
+		else if (strcmp(field_str, "sym-offset") == 0)
+			flags |= HIST_FIELD_FL_SYM_OFFSET;
 		else {
 			ret = -EINVAL;
 			goto out;
@@ -726,6 +732,7 @@ hist_trigger_entry_print(struct seq_file *m,
 			 struct tracing_map_elt *elt)
 {
 	struct hist_field *key_field;
+	char str[KSYM_SYMBOL_LEN];
 	unsigned int i;
 	u64 uval;
 
@@ -741,6 +748,16 @@ hist_trigger_entry_print(struct seq_file *m,
 			uval = *(u64 *)(key + key_field->offset);
 			seq_printf(m, "%s: %llx",
 				   key_field->field->name, uval);
+		} else if (key_field->flags & HIST_FIELD_FL_SYM) {
+			uval = *(u64 *)(key + key_field->offset);
+			sprint_symbol_no_offset(str, uval);
+			seq_printf(m, "%s: [%llx] %-45s",
+				   key_field->field->name, uval, str);
+		} else if (key_field->flags & HIST_FIELD_FL_SYM_OFFSET) {
+			uval = *(u64 *)(key + key_field->offset);
+			sprint_symbol(str, uval);
+			seq_printf(m, "%s: [%llx] %-55s",
+				   key_field->field->name, uval, str);
 		} else if (key_field->flags & HIST_FIELD_FL_STRING) {
 			seq_printf(m, "%s: %-50s", key_field->field->name,
 				   (char *)(key + key_field->offset));
@@ -856,6 +873,10 @@ static const char *get_hist_field_flags(struct hist_field *hist_field)
 
 	if (hist_field->flags & HIST_FIELD_FL_HEX)
 		flags_str = "hex";
+	else if (hist_field->flags & HIST_FIELD_FL_SYM)
+		flags_str = "sym";
+	else if (hist_field->flags & HIST_FIELD_FL_SYM_OFFSET)
+		flags_str = "sym-offset";
 
 	return flags_str;
 }