Support for the new has_event function in metrics.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/pmu-events/metric.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/perf/pmu-events/metric.py b/tools/perf/pmu-events/metric.py
index af58b74d1644..85a3545f5b6a 100644
--- a/tools/perf/pmu-events/metric.py
+++ b/tools/perf/pmu-events/metric.py
@@ -408,6 +408,12 @@ def source_count(event: Event) -> Function:
   return Function('source_count', event)
 
 
+def has_event(event: Event) -> Function:
+  # pylint: disable=redefined-builtin
+  # pylint: disable=invalid-name
+  return Function('has_event', event)
+
+
 class Metric:
   """An individual metric that will specifiable on the perf command line."""
   groups: Set[str]
@@ -539,7 +545,7 @@ def ParsePerfJson(orig: str) -> Expression:
               r'Event(r"\1")', py)
   py = re.sub(r'#Event\(r"([^"]*)"\)', r'Literal("#\1")', py)
   py = re.sub(r'([0-9]+)Event\(r"(e[0-9]+)"\)', r'\1\2', py)
-  keywords = ['if', 'else', 'min', 'max', 'd_ratio', 'source_count']
+  keywords = ['if', 'else', 'min', 'max', 'd_ratio', 'source_count', 'has_event']
   for kw in keywords:
     py = re.sub(rf'Event\(r"{kw}"\)', kw, py)
 
-- 
2.41.0.162.gfafddb0af9-goog