From patchwork Thu Jul 7 07:15:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 12909129 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C43B0C43334 for ; Thu, 7 Jul 2022 07:17:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:Subject:Cc:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=IFXf1aXfyKznhFRmO3Oy3BKoDgRh5H5GOaYYWm0JwSA=; b=mqNsqOf1ylC9mn OAM+nyLIJiQeoVS/uErAIJ/xN+ANkDvubS/cxtN7c+0H9CPds3gny5Ec9raK99ji659ZLz4b4ZkZb suaKXHgO4vi+7anjcDgJnOYUGTivt+Bd3ePmZI5aMUtfdMBn8qts1nWQEgGb+TdaxJ77zEYz1oZgC +a8KNd2X/OYzU+E0pPh6XPj2QjQxFCQqawzjt3BYyF3LHhhU5Wg9suyNgyvHEMUaaHjW0C3PkOk4Q Svzw7u+sGwt3NXk1PB5/tetRqnRHrjV1J/AwPAA/n80jmYZK+JD4wgeljKrkNvxxiVkIecPovkD3F /eg54Ly53icoxvbONa3A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o9LkE-00ETdb-1O; Thu, 07 Jul 2022 07:16:14 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o9Lk9-00ETbY-HN; Thu, 07 Jul 2022 07:16:11 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8FAB0D6E; Thu, 7 Jul 2022 00:16:06 -0700 (PDT) Received: from e123648.arm.com (unknown [10.57.11.194]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 0E5C73F70D; Thu, 7 Jul 2022 00:16:02 -0700 (PDT) From: Lukasz Luba To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Cc: daniel.lezcano@linaro.org, amitk@kernel.org, rui.zhang@intel.com, lukasz.luba@arm.com, viresh.kumar@linaro.org, rafael@kernel.org, dietmar.eggemann@arm.com, nm@ti.com, sboyd@kernel.org, sudeep.holla@arm.com, cristian.marussi@arm.com, matthias.bgg@gmail.com, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 0/4] Energy Model power in micro-Watts and SCMI v3.1 alignment Date: Thu, 7 Jul 2022 08:15:51 +0100 Message-Id: <20220707071555.10085-1-lukasz.luba@arm.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220707_001609_676806_2390A635 X-CRM114-Status: UNSURE ( 7.62 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi all, This is a patch set which changes Energy Model power values scale to micro-Watts. It also upgrades the SCMI performance layer + scmi-cpufreq driver to leverage the SCMI v3.1 spec and process micro-Watts power values coming from FW. The higher precision in EM power field solves an issue of a rounding error, which then can be misinterpreted as 'inefficient OPP'. An example rounding issue calculation is present in patch 1/4 description. Changes: v2 - simplified 32bit checks for max number of CPUs preventing energy estimation overflow - added Reviewed-by and ACKs v1 [1] Regards, Lukasz Luba [1] https://lore.kernel.org/lkml/20220622145802.13032-1-lukasz.luba@arm.com/ Lukasz Luba (4): PM: EM: convert power field to micro-Watts precision and align drivers Documentation: EM: Switch to micro-Watts scale firmware: arm_scmi: Get detailed power scale from perf cpufreq: scmi: Support the power scale in micro-Watts in SCMI v3.1 Documentation/power/energy-model.rst | 14 +++---- drivers/cpufreq/mediatek-cpufreq-hw.c | 7 ++-- drivers/cpufreq/scmi-cpufreq.c | 15 +++++++- drivers/firmware/arm_scmi/perf.c | 18 +++++---- drivers/opp/of.c | 15 ++++---- drivers/powercap/dtpm_cpu.c | 5 +-- drivers/thermal/cpufreq_cooling.c | 13 ++++++- drivers/thermal/devfreq_cooling.c | 19 ++++++++-- include/linux/energy_model.h | 54 +++++++++++++++++++-------- include/linux/scmi_protocol.h | 8 +++- kernel/power/energy_model.c | 24 ++++++++---- 11 files changed, 132 insertions(+), 60 deletions(-)