If MYPY=1 is passed to the build then run mypy over python code in
perf. Unlike shellcheck this isn't default on as there are currently
too many errors.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/Build            | 13 +++++++++++++
 tools/perf/Makefile.perf    |  7 ++++++-
 tools/perf/pmu-events/Build | 14 +++++++++++++-
 tools/perf/scripts/Build    | 13 +++++++++++++
 tools/perf/tests/Build      | 13 +++++++++++++
 tools/perf/util/Build       | 13 +++++++++++++
 6 files changed, 71 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Build b/tools/perf/Build
index 5e385f370dd7..312914994c89 100644
--- a/tools/perf/Build
+++ b/tools/perf/Build
@@ -76,3 +76,16 @@ $(OUTPUT)%.shellcheck_log: %
 	$(Q)$(call echo-cmd,test)shellcheck -s bash -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-y += $(SHELL_TEST_LOGS)
+
+ifdef MYPY
+  PY_TESTS := $(shell find python -type f -name '*.py')
+  MYPY_TEST_LOGS := $(PY_TESTS:python/%=python/%.mypy_log)
+else
+  MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+perf-y += $(MYPY_TEST_LOGS)
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index a9f2a9f6ebf0..333afe29b1e2 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -277,8 +277,13 @@ ifneq ($(SHELLCHECK),)
   endif
 endif
 
+# Runs mypy on perf python files
+ifeq ($(MYPY),1)
+  MYPY := $(shell which mypy 2> /dev/null)
+endif
+
 export srctree OUTPUT RM CC CXX LD AR CFLAGS CXXFLAGS V BISON FLEX AWK
-export HOSTCC HOSTLD HOSTAR HOSTCFLAGS SHELLCHECK
+export HOSTCC HOSTLD HOSTAR HOSTCFLAGS SHELLCHECK MYPY
 
 include $(srctree)/tools/build/Makefile.include
 
diff --git a/tools/perf/pmu-events/Build b/tools/perf/pmu-events/Build
index d941bc9d16e9..fc1dc810ffb6 100644
--- a/tools/perf/pmu-events/Build
+++ b/tools/perf/pmu-events/Build
@@ -41,7 +41,19 @@ $(EMPTY_PMU_EVENTS_TEST_LOG): $(EMPTY_PMU_EVENTS_C) $(TEST_EMPTY_PMU_EVENTS_C)
 	$(call rule_mkdir)
 	$(Q)$(call echo-cmd,test)diff -u $^ 2> $@ || (cat $@ && false)
 
-$(PMU_EVENTS_C): $(JSON) $(JSON_TEST) $(JEVENTS_PY) $(METRIC_PY) $(METRIC_TEST_LOG) $(EMPTY_PMU_EVENTS_TEST_LOG)
+ifdef MYPY
+  PMU_EVENTS_PY_TESTS := $(wildcard *.py)
+  PMU_EVENTS_MYPY_TEST_LOGS := $(JEVENTS_PY_TESTS:%=%.mypy_log)
+else
+  PMU_EVENTS_MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+$(PMU_EVENTS_C): $(JSON) $(JSON_TEST) $(JEVENTS_PY) $(METRIC_PY) $(METRIC_TEST_LOG) \
+    $(EMPTY_PMU_EVENTS_TEST_LOG) $(PMU_EVENTS_MYPY_TEST_LOGS)
 	$(call rule_mkdir)
 	$(Q)$(call echo-cmd,gen)$(PYTHON) $(JEVENTS_PY) $(JEVENTS_ARCH) $(JEVENTS_MODEL) pmu-events/arch $@
 endif
diff --git a/tools/perf/scripts/Build b/tools/perf/scripts/Build
index 46f0c6f76dbf..a5350dc6ac50 100644
--- a/tools/perf/scripts/Build
+++ b/tools/perf/scripts/Build
@@ -2,3 +2,16 @@ ifeq ($(CONFIG_LIBTRACEEVENT),y)
   perf-util-$(CONFIG_LIBPERL)   += perl/Perf-Trace-Util/
 endif
 perf-util-$(CONFIG_LIBPYTHON) += python/Perf-Trace-Util/
+
+ifdef MYPY
+  PY_TESTS := $(shell find python -type f -name '*.py')
+  MYPY_TEST_LOGS := $(PY_TESTS:python/%=python/%.mypy_log)
+else
+  MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+perf-y += $(MYPY_TEST_LOGS)
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index a51d28c7431c..4d7c38a2bf6c 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -91,3 +91,16 @@ $(OUTPUT)%.shellcheck_log: %
 	$(Q)$(call echo-cmd,test)shellcheck -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-test-y += $(SHELL_TEST_LOGS)
+
+ifdef MYPY
+  PY_TESTS := $(shell find tests/shell -type f -name '*.py')
+  MYPY_TEST_LOGS := $(PY_TESTS:tests/shell/%=shell/%.mypy_log)
+else
+  MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+perf-test-y += $(MYPY_TEST_LOGS)
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 18cd02ccd3ff..3baa1f41502d 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -409,3 +409,16 @@ $(OUTPUT)%.shellcheck_log: %
 	$(Q)$(call echo-cmd,test)shellcheck -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-util-y += $(SHELL_TEST_LOGS)
+
+PY_TESTS := setup.py
+ifdef MYPY
+  MYPY_TEST_LOGS := $(PY_TESTS:%=%.mypy_log)
+else
+  MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+perf-util-y += $(MYPY_TEST_LOGS)
-- 
2.47.0.163.g1226f6d8fa-goog