[RFC PATCH 1/2] perf python: Add access to various members of evsel

[Akinobu Mita <akinobu.mita@gmail.com>]

This change is necessary to specify the same PMU event selection as the
'perf record' -e option from DAMON's userspace tools.

For example, a Python script like the following will allow you to obtain
the values to be set in the type, config, config1, and config2 members of
perf_event_attr by providing a symbolic event name.

import perf

if __name__ == '__main__':
    evlist = perf.parse_events("cpu/mem-loads,ldlat=30/P")
    for evsel in evlist:
        print(f"{evsel}: type={evsel.type} config={evsel.config}",
              f"config1={evsel.config1} config2={evsel.config2}")

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
 tools/perf/util/python.c | 50 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index cc1019d29a5d..3f108b405ee3 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1241,11 +1241,60 @@ static PyMemberDef pyrf_evsel__members[] = {
 	evsel_attr_member_def(sample_type, T_ULONGLONG, "attribute sample_type."),
 	evsel_attr_member_def(read_format, T_ULONGLONG, "attribute read_format."),
 	evsel_attr_member_def(wakeup_events, T_UINT, "attribute wakeup_events."),
+	evsel_attr_member_def(config1, T_ULONGLONG, "attribute config1."),
+	evsel_attr_member_def(config2, T_ULONGLONG, "attribute config2."),
 	{ .name = NULL, },
 };
 
 static const char pyrf_evsel__doc[] = PyDoc_STR("perf event selector list object.");
 
+static PyObject *pyrf_evsel__get_freq(struct pyrf_evsel *pevsel, void *closure)
+{
+	return PyLong_FromLong(pevsel->evsel.core.attr.freq);
+}
+
+static PyObject *pyrf_evsel__get_exclude_kernel(struct pyrf_evsel *pevsel,
+						void *closure)
+{
+	return PyLong_FromLong(pevsel->evsel.core.attr.exclude_kernel);
+}
+
+static PyObject *pyrf_evsel__get_exclude_hv(struct pyrf_evsel *pevsel,
+					    void *closure)
+{
+	return PyLong_FromLong(pevsel->evsel.core.attr.exclude_hv);
+}
+
+static PyObject *pyrf_evsel__get_precise_ip(struct pyrf_evsel *pevsel,
+					    void *closure)
+{
+	return PyLong_FromLong(pevsel->evsel.core.attr.precise_ip);
+}
+
+static PyGetSetDef pyrf_evsel__getset[] = {
+	{
+		.name	= "freq",
+		.get	= (getter)pyrf_evsel__get_freq,
+		.doc	= PyDoc_STR("freq"),
+	},
+	{
+		.name	= "exclude_kernel",
+		.get	= (getter)pyrf_evsel__get_exclude_kernel,
+		.doc	= PyDoc_STR("exclude_kernel"),
+	},
+	{
+		.name	= "exclude_hv",
+		.get	= (getter)pyrf_evsel__get_exclude_hv,
+		.doc	= PyDoc_STR("exclude_hv"),
+	},
+	{
+		.name	= "precise_ip",
+		.get	= (getter)pyrf_evsel__get_precise_ip,
+		.doc	= PyDoc_STR("precise_ip"),
+	},
+	{ .name = NULL, },
+};
+
 static PyTypeObject pyrf_evsel__type = {
 	PyVarObject_HEAD_INIT(NULL, 0)
 	.tp_name	= "perf.evsel",
@@ -1255,6 +1304,7 @@ static PyTypeObject pyrf_evsel__type = {
 	.tp_doc		= pyrf_evsel__doc,
 	.tp_members	= pyrf_evsel__members,
 	.tp_methods	= pyrf_evsel__methods,
+	.tp_getset	= pyrf_evsel__getset,
 	.tp_init	= (initproc)pyrf_evsel__init,
 	.tp_str         = pyrf_evsel__str,
 	.tp_repr        = pyrf_evsel__str,
-- 
2.43.0