From nobody Fri Oct 3 13:32:34 2025 Received: from fanzine2.igalia.com (fanzine2.igalia.com [213.97.179.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8042F157493; Mon, 1 Sep 2025 02:00:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.97.179.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756692039; cv=none; b=s+tbtbjt+CfGP44Nso79dPXhyGbTe+q8NPyCnj73TeI9ERp6DyYsLX5xsQxb4hgxsjUxsfKrfNisvETM1YSb5l/O3TvMBO6zfBOiCAhKTJHHCPc/1cNAoam9wbcIJEd3J/4eW5lhNifjgHMBPLsuDRSFFEXkJGhWop35k5kMcKE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756692039; c=relaxed/simple; bh=H91L/j65Ys5yJfXKrAdE0GL1zhyY3X6kZtS8EKcLQIU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cCDMcNHqCYh12QkSeaatkFEERmUwHsXKEe1F9n8Ls0CIEnoj0ylYtddVUfUb6zmpZu3bobvN8e4mZ9b1RLL99KCiZ9h/v3SRYhabgVL0ZBq+pAzbd55z2L1Mtu5eaf1jgZS3C2qOvou12HIlf5xsBjLLNWOz2ofMImW/sCcxynE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com; spf=pass smtp.mailfrom=igalia.com; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b=jBOsGklZ; arc=none smtp.client-ip=213.97.179.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=igalia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b="jBOsGklZ" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=/P6KrSUVg6/xnpaU4Wu3I9Tw06U0B/Y3pbKy5U5GQJw=; b=jBOsGklZvCrtN9dgpQc51Crsgz xjFUqvMQQAZYeirfiKkPoMQTRLdBU1UC3QTEq89k55JjdSiCQ3fvkod2iX9TLiQzMi/3W5br5tPCl 6g2UMu83xSu9s1P9p3tLhu8gQUAk7Gi00UekARXq7h4s0YLZcH8bvrWEZhrVka1PhX0H3lW+ikLhO iB7zyat01kUFEAFjOpQySG20Zqn6tdqrZETWKvQbXpx4qevke1jtjXtGIbViDC+QowexiF3Jy4sum bRfRndeIQ+AdcMVtDmmaHAmUi7lXrfz28+WuZet7rBbHzwUbvZJEVEBUwTE3rGOhXNpTpiEGiLbHV VX5/g81Q==; Received: from [58.29.143.236] (helo=localhost) by fanzine2.igalia.com with utf8esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1ustqI-0054Tc-I4; Mon, 01 Sep 2025 04:00:23 +0200 From: Changwoo Min To: lukasz.luba@arm.com, rafael@kernel.org, len.brown@intel.com, pavel@kernel.org Cc: christian.loehle@arm.com, tj@kernel.org, kernel-dev@igalia.com, linux-pm@vger.kernel.org, sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org, Changwoo Min Subject: [PATCH v4 02/10] PM: EM: Expose the ID of a performance domain via debugfs Date: Mon, 1 Sep 2025 10:59:55 +0900 Message-ID: <20250901020003.86415-3-changwoo@igalia.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250901020003.86415-1-changwoo@igalia.com> References: <20250901020003.86415-1-changwoo@igalia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- kernel/power/energy_model.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c index 58671ac142db..6e5e70dbec88 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, voi= d *unused) } DEFINE_SHOW_ATTRIBUTE(em_debug_flags); =20 +static int em_debug_id_show(struct seq_file *s, void *unused) +{ + struct em_perf_domain *pd =3D 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); =20 + debugfs_create_file("id", 0444, d, dev->em_pd, &em_debug_id_fops); + em_dbg =3D devm_kcalloc(dev, dev->em_pd->nr_perf_states, sizeof(*em_dbg), GFP_KERNEL); if (!em_dbg) --=20 2.51.0