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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

kernel/power/energy_model.c+12−0
@@ -126,6 +126,16 @@ static int em_debug_flags_show(struct seq_file *s, void *unused) · 125 unmodified lines
126}126}
127DEFINE_SHOW_ATTRIBUTE(em_debug_flags);127DEFINE_SHOW_ATTRIBUTE(em_debug_flags);
128 128
129static 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}
137DEFINE_SHOW_ATTRIBUTE(em_debug_id);
138
129static void em_debug_create_pd(struct device *dev)139static void em_debug_create_pd(struct device *dev)
130{140{
131 struct em_dbg_info *em_dbg;141 struct em_dbg_info *em_dbg;
@@ -142,6 +152,8 @@ static void em_debug_create_pd(struct device *dev) · 10 unmodified lines
142 debugfs_create_file("flags", 0444, d, dev->em_pd,152 debugfs_create_file("flags", 0444, d, dev->em_pd,
143 &em_debug_flags_fops);153 &em_debug_flags_fops);
144 154
155 debugfs_create_file("id", 0444, d, dev->em_pd, &em_debug_id_fops);
156
145 em_dbg = devm_kcalloc(dev, dev->em_pd->nr_perf_states,157 em_dbg = devm_kcalloc(dev, dev->em_pd->nr_perf_states,
146 sizeof(*em_dbg), GFP_KERNEL);158 sizeof(*em_dbg), GFP_KERNEL);
147 if (!em_dbg)159 if (!em_dbg)