From nobody Thu Oct 2 07:46:27 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 26F0723ABB6; Sun, 21 Sep 2025 03:20:01 +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=1758424803; cv=none; b=nEpQYFul9cOccHB4ae3NWccXkPGH+Qbm6SApNjKRMyz16wO36aSMRsdFg/ERjuJzlPt2n/3DuAtV6J22mr9bL3YMJHJjpy54isyQXU5S+w5BjfMe2ART79e7L4QDrqrcPNxq6SzgJJ7dZ69HqOQtoJpekNxAy8bLGeFlqSmXURk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758424803; c=relaxed/simple; bh=vzPToS00sAaSlBa/zWzdMB+aZcRjUHkgd92unQhEelA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=awEuJh1OFKBxShdBFLI+UpBoX00xXeN3bYjkgSSVrtGvzpCnQurQJShcHb3jAbSPherpMHvnyQsGpTUGAdFhEUCMeCXUrATKG/AP/JGzUPoOzWjmj8wCBWY8Kp2dQVhpIpduR8OpfsN9QDcV1l1qdQPrKos6wBA+dJ82iSzKyk8= 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=PClitsM0; 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="PClitsM0" 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=8CJZftMR/Gj0POFf8Bpzi7R4sOx8MiU/XCx/07J/Ugg=; b=PClitsM0i4zfF7NIOJV6pdGGnd 5n0flr0GIK0yJT3gz9BmkAgLnCdMlBHWw2spwRVdvjV0ADet7RAxMepwFxvgMxh9Tgfl7ur28UsHd l4coD1JAX0fNBu68ntoZaqZbtumbIxcqosZOcRNyl+28S5LESicabRKMBxyLHwb29iC1L0jXaSAYa e5vG5jvS8VdTsGAy3cnSYGHZrztgV+YHvoRY3kVKSovr5dUxImbdTjxISuLlB+AXLmYso+pNp/FXf pBsprKQHF4rvyItBhQkYjdqridM2PyGgjDkUsG9SIKj09LNiF77pah/wWL7cWwLn4auqRUIeQqagM nVBaMVjg==; 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 1v0Ac7-00EcgN-FA; Sun, 21 Sep 2025 05:19:48 +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 RESEND v4 02/10] PM: EM: Expose the ID of a performance domain via debugfs Date: Sun, 21 Sep 2025 12:19:20 +0900 Message-ID: <20250921031928.205869-3-changwoo@igalia.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250921031928.205869-1-changwoo@igalia.com> References: <20250921031928.205869-1-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 3fe562b6230e..8998a7f4910a 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