PM: EM: Expose the ID of a performance domain via debugfs

For ease of debugging, let's expose the assigned ID of a performance domain through debugfs (e.g., /sys/kernel/debug/energy_model/cpu0/id).

Changwoo Min committed 1 year ago

Commit ee50b8b1 parent cbe5aee1 file · +12 −0Browse files

Unified · Split

@@ -126,6 +126,16 @@ static int em_debug_flags_show(struct seq_file s, void unused) · 125 unmodified lines
126	126	}
127	127	DEFINE_SHOW_ATTRIBUTE(em_debug_flags);
128	128
	129	+static int em_debug_id_show(struct seq_file s, void unused)
	130	+{
	131	+ struct em_perf_domain *pd = s->private;
	132	+
	133	+ seq_printf(s, "%d\n", pd->id);
	134	+
	135	+ return 0;
	136	+}
	137	+DEFINE_SHOW_ATTRIBUTE(em_debug_id);
	138	+
129	139	static void em_debug_create_pd(struct device *dev)
130	140	{
131	141	struct em_dbg_info *em_dbg;
@@ -142,6 +152,8 @@ static void em_debug_create_pd(struct device *dev) · 10 unmodified lines
142	152	debugfs_create_file("flags", 0444, d, dev->em_pd,
143	153	&em_debug_flags_fops);
144	154
	155	+ debugfs_create_file("id", 0444, d, dev->em_pd, &em_debug_id_fops);
	156	+
145	157	em_dbg = devm_kcalloc(dev, dev->em_pd->nr_perf_states,
146	158	sizeof(*em_dbg), GFP_KERNEL);
147	159	if (!em_dbg)