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diff --git a/tools/perf/Documentation/perf-script-python.txt b/tools/perf/Documentation/perf-script-python.txt
index 51ec2d20068a..0fb9eda3cbca 100644
--- a/tools/perf/Documentation/perf-script-python.txt
+++ b/tools/perf/Documentation/perf-script-python.txt
@@ -610,6 +610,32 @@ Various utility functions for use with perf script:
nsecs_str(nsecs) - returns printable string in the form secs.nsecs
avg(total, n) - returns average given a sum and a total number of values
+SUPPORTED FIELDS
+----------------
+
+Currently supported fields:
+
+ev_name, comm, pid, tid, cpu, ip, time, period, phys_addr, addr,
+symbol, dso, time_enabled, time_running, values, callchain,
+brstack, brstacksym, datasrc, datasrc_decode, iregs, uregs,
+weight, transaction, raw_buf, attr.
+
+Some fields have sub items:
+
+brstack:
+ from, to, from_dsoname, to_dsoname, mispred,
+ predicted, in_tx, abort, cycles.
+
+brstacksym:
+ items: from, to, pred, in_tx, abort (converted string)
+
+For example,
+We can use this code to print brstack "from", "to", "cycles".
+
+if 'brstack' in dict:
+ for entry in dict['brstack']:
+ print "from %s, to %s, cycles %s" % (entry["from"], entry["to"], entry["cycles"])
+
SEE ALSO
--------
linkperf:perf-script[1]