2 files changed, 25 insertions, 0 deletions

diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 55b41b9e3834..be8412d699a1 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -897,6 +897,21 @@ static int event_read_fields(struct event *event, struct format_field **fields)
                 if (read_expected(EVENT_OP, (char *)";") < 0)
                         goto fail_expect;
 
+                if (read_expected(EVENT_ITEM, (char *)"signed") < 0)
+                        goto fail_expect;
+
+                if (read_expected(EVENT_OP, (char *)":") < 0)
+                        goto fail_expect;
+
+                if (read_expect_type(EVENT_ITEM, &token))
+                        goto fail;
+                if (strtoul(token, NULL, 0))
+                        field->flags |= FIELD_IS_SIGNED;
+                free_token(token);
+
+                if (read_expected(EVENT_OP, (char *)";") < 0)
+                        goto fail_expect;
+
                 if (read_expect_type(EVENT_NEWLINE, &token) < 0)
                         goto fail;
                 free_token(token);
@@ -2845,6 +2860,15 @@ static void parse_header_field(char *type,
         free_token(token);
         if (read_expected(EVENT_OP, (char *)";") < 0)
                 return;
+        if (read_expected(EVENT_ITEM, (char *)"signed") < 0)
+                return;
+        if (read_expected(EVENT_OP, (char *)":") < 0)
+                return;
+        if (read_expect_type(EVENT_ITEM, &token) < 0)
+                return;
+        free_token(token);
+        if (read_expected(EVENT_OP, (char *)";") < 0)
+                return;
         if (read_expect_type(EVENT_NEWLINE, &token) < 0)
                 return;
         free_token(token);
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index 162c3e6deb93..00b440df66d8 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -26,6 +26,7 @@ enum {
 enum format_flags {
         FIELD_IS_ARRAY          = 1,
         FIELD_IS_POINTER        = 2,
+        FIELD_IS_SIGNED         = 4,
 };
 
 struct format_field {