From nobody Sat Jan 3 03:56:04 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9360E7C4EE for ; Wed, 4 Oct 2023 18:35:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244426AbjJDSfH (ORCPT ); Wed, 4 Oct 2023 14:35:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244415AbjJDSfE (ORCPT ); Wed, 4 Oct 2023 14:35:04 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4FF0A7; Wed, 4 Oct 2023 11:35:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1696444500; x=1727980500; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=bpSnUeyMCwr5z8q24pn1zkzo5CtrPo+vd10q6+Wf0l0=; b=Uo9vqPMr/6k6DuxuUB+ra/S5yf6o8RCQosIHI7cQKqv19sEEnFWwUE6S T6vq7Ka5Kq3dfueJD3tFpPLRydKWFDpk99YuUgj6RSxNDFH2upM4JkS1g InCjUpR7hVDbD9bFX9rvEafBwG8CZleg3BkBVd74oGq4sxWmzo8szJWeK umtSU11W+XSvK6vbPqo829RW+q0bl50Dk5ngWznNsrj8uFN3j4PEb+Noi 2Ff7+9ajvtyqrEnk9AOyylSsfka2YCsoiv8LqCABR7N2a3SLYDNVOheUF 7Yt3oDiF7322Zoc59FEnYvzYxTFOvNtF28xDHUos+8SNdLsYTS1REeA7l Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10853"; a="383168102" X-IronPort-AV: E=Sophos;i="6.03,201,1694761200"; d="scan'208";a="383168102" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Oct 2023 11:34:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10853"; a="780909015" X-IronPort-AV: E=Sophos;i="6.03,201,1694761200"; d="scan'208";a="780909015" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.153]) by orsmga008.jf.intel.com with SMTP; 04 Oct 2023 11:34:55 -0700 Received: by stinkbox (sSMTP sendmail emulation); Wed, 04 Oct 2023 21:34:55 +0300 From: Ville Syrjala To: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, Zhang Rui , Wang Wendy , "Rafael J . Wysocki" , Srinivas Pandruvada Subject: [PATCH] powercap: intel_rapl: Don't warn about BIOS locked limits during resume Date: Wed, 4 Oct 2023 21:34:55 +0300 Message-ID: <20231004183455.27797-1-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ville Syrj=C3=A4l=C3=A4 Restore enough of the original behaviour to stop spamming dmesg with warnings about BIOS locked limits when trying to restore them during resume. This still doesn't 100% match the original behaviour as we no longer attempt to blindly restore the BIOS locked limits. No idea if that makes any difference in practice. Cc: Zhang Rui Cc: Wang Wendy Cc: Rafael J. Wysocki Cc: Srinivas Pandruvada Fixes: 9050a9cd5e4c ("powercap: intel_rapl: Cleanup Power Limits support") Signed-off-by: Ville Syrj=C3=A4l=C3=A4 --- drivers/powercap/intel_rapl_common.c | 28 ++++++++++++++++++++-------- 1 file changed, 20 insertions(+), 8 deletions(-) diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_= rapl_common.c index 40a2cc649c79..9a6a40c83f82 100644 --- a/drivers/powercap/intel_rapl_common.c +++ b/drivers/powercap/intel_rapl_common.c @@ -882,22 +882,34 @@ static int rapl_read_pl_data(struct rapl_domain *rd, = int pl, return rapl_read_data_raw(rd, prim, xlate, data); } =20 -static int rapl_write_pl_data(struct rapl_domain *rd, int pl, - enum pl_prims pl_prim, - unsigned long long value) +static int rapl_write_pl_data_nowarn(struct rapl_domain *rd, int pl, + enum pl_prims pl_prim, + unsigned long long value) { enum rapl_primitives prim =3D get_pl_prim(rd, pl, pl_prim); =20 if (!is_pl_valid(rd, pl)) return -EINVAL; =20 - if (rd->rpl[pl].locked) { - pr_warn("%s:%s:%s locked by BIOS\n", rd->rp->name, rd->name, pl_names[pl= ]); + if (rd->rpl[pl].locked) return -EACCES; - } =20 return rapl_write_data_raw(rd, prim, value); } + +static int rapl_write_pl_data(struct rapl_domain *rd, int pl, + enum pl_prims pl_prim, + unsigned long long value) +{ + int ret; + + ret =3D rapl_write_pl_data_nowarn(rd, pl, pl_prim, value); + if (ret =3D=3D -EACCES) + pr_warn("%s:%s:%s locked by BIOS\n", rd->rp->name, rd->name, pl_names[pl= ]); + + return ret; +} + /* * Raw RAPL data stored in MSRs are in certain scales. We need to * convert them into standard units based on the units reported in @@ -1634,8 +1646,8 @@ static void power_limit_state_restore(void) rd =3D power_zone_to_rapl_domain(rp->power_zone); for (i =3D POWER_LIMIT1; i < NR_POWER_LIMITS; i++) if (rd->rpl[i].last_power_limit) - rapl_write_pl_data(rd, i, PL_LIMIT, - rd->rpl[i].last_power_limit); + rapl_write_pl_data_nowarn(rd, i, PL_LIMIT, + rd->rpl[i].last_power_limit); } cpus_read_unlock(); } --=20 2.41.0