Commit ee50b8bb authored by Changwoo Min's avatar Changwoo Min Committed by Rafael J. Wysocki
Browse files

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).

Signed-off-by: default avatarChangwoo Min <changwoo@igalia.com>
Reviewed-by: default avatarLukasz Luba <lukasz.luba@arm.com>
Link: https://patch.msgid.link/20251020220914.320832-3-changwoo@igalia.com


Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent cbe5aeed

kernel/power/energy_model.c

+12 −0
Original line number Diff line number Diff line
@@ -126,6 +126,16 @@ static int em_debug_flags_show(struct seq_file *s, void *unused) 
}

DEFINE_SHOW_ATTRIBUTE(em_debug_flags);



static int em_debug_id_show(struct seq_file *s, void *unused)

{

	struct em_perf_domain *pd = s->private;



	seq_printf(s, "%d\n", pd->id);



	return 0;

}

DEFINE_SHOW_ATTRIBUTE(em_debug_id);



static void em_debug_create_pd(struct device *dev)

{

	struct em_dbg_info *em_dbg;
@@ -142,6 +152,8 @@ static void em_debug_create_pd(struct device *dev) 
	debugfs_create_file("flags", 0444, d, dev->em_pd,

			    &em_debug_flags_fops);



	debugfs_create_file("id", 0444, d, dev->em_pd, &em_debug_id_fops);



	em_dbg = devm_kcalloc(dev, dev->em_pd->nr_perf_states,

			      sizeof(*em_dbg), GFP_KERNEL);

	if (!em_dbg)