From: Changwoo Min Date: Mon, 20 Oct 2025 22:09:06 +0000 (+0900) Subject: PM: EM: Expose the ID of a performance domain via debugfs X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ee50b8bb6b5d62fc2ebff872ee7ecb3a9380ec64;p=thirdparty%2Flinux.git 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: Changwoo Min Reviewed-by: Lukasz Luba Link: https://patch.msgid.link/20251020220914.320832-3-changwoo@igalia.com Signed-off-by: Rafael J. Wysocki --- diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c index 2047b546ad112..756debf5406a8 100644 --- a/kernel/power/energy_model.c +++ b/kernel/power/energy_model.c @@ -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)