From mboxrd@z Thu Jan 1 00:00:00 1970 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 8D6E2C433EF for ; Mon, 23 May 2022 18:03:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240858AbiEWSDK (ORCPT ); Mon, 23 May 2022 14:03:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39910 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243587AbiEWSB5 (ORCPT ); Mon, 23 May 2022 14:01:57 -0400 Received: from ms.lwn.net (ms.lwn.net [IPv6:2600:3c01:e000:3a1::42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9DA59DFF48; Mon, 23 May 2022 10:46:51 -0700 (PDT) Received: from localhost (unknown [IPv6:2601:281:8300:35::5f6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ms.lwn.net (Postfix) with ESMTPSA id B981660A; Mon, 23 May 2022 17:46:05 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 ms.lwn.net B981660A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lwn.net; s=20201203; t=1653327965; bh=tKg2U0MvNTJAYNl6IAoyEFljp3YdzFQOTMvhJuCB7vw=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=M8bVJTBgGchdemxpZMG8x4ui4vpVchupoKVbrRx8XiuM24+s4+3VDXEa9zJcDyRm9 aKa5VFSNgvNL2YktRd35Qc0+RI5Yx2qsv9yoh8Q+EmfuLI/l1BOYozhH7vAYGhhTO+ fTYW5iySlsQ3krhbMQxNcT74AWOhF41Bk/WWY/hADh6aU6Syh41n9TvDTVoHGoZ7/0 UQX6pqO+lb75dpi+JBmrb6GVKJLoo2rGyHDYb5cQNRa3JrccCNCtz4/BBfO/NWQylF yjXwHwnquaWSzMFZW83wMQ3Zyt7GWAfBM9Zct1nH/q/zyOry2TaqTQzck1dfg08etg nBi9EfqudA4wg== From: Jonathan Corbet To: Srinivas Pandruvada , rafael@kernel.org, hdegoede@redhat.com, markgross@kernel.org Cc: lenb@kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-doc@vger.kernel.org, platform-driver-x86@vger.kernel.org, prarit@redhat.com, Srinivas Pandruvada Subject: Re: [PATCH] Documentation: admin-guide: pm: Add Out of Band mode In-Reply-To: <20220523172757.2351052-1-srinivas.pandruvada@linux.intel.com> References: <20220523172757.2351052-1-srinivas.pandruvada@linux.intel.com> Date: Mon, 23 May 2022 11:46:04 -0600 Message-ID: <871qwkb0rn.fsf@meer.lwn.net> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Srinivas Pandruvada writes: > Update documentation for using the tool to support performance level > change via OOB (Out of Band) interface. > > Signed-off-by: Srinivas Pandruvada > --- > .../admin-guide/pm/intel-speed-select.rst | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/Documentation/admin-guide/pm/intel-speed-select.rst b/Documentation/admin-guide/pm/intel-speed-select.rst > index 0a1fbdb54bfe..4146a2da35ea 100644 > --- a/Documentation/admin-guide/pm/intel-speed-select.rst > +++ b/Documentation/admin-guide/pm/intel-speed-select.rst > @@ -262,6 +262,25 @@ Which shows that the base frequency now increased from 2600 MHz at performance > level 0 to 2800 MHz at performance level 4. As a result, any workload, which can > use fewer CPUs, can see a boost of 200 MHz compared to performance level 0. > > +Changing performance level via BMC Interface > +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > + > +It is possible to change SST-PP level using out of band (OOB) agent (Via some > +remote management console, through BMC "Baseboard Management Controller" > +interface). This mode is supported from the Sapphire Rapids processor > +generation. The kernel and tool change to support this mode is added to Linux > +kernel version 5.18. To enable this feature, kernel config > +"CONFIG_INTEL_HFI_THERMAL" is required. The minimum version of the tool > +is "v1.12" to support this feature, which is part of Linux kernel version 5.18. > + > +To support such configuration, this tool can be used as a daemon. Add > +a command line option --oob:: > + > +# intel-speed-select --oob > + This suggests you haven't actually built the documentation with your change and verified that you got the result you were after. Literal blocks need to be indented. Thanks, jon