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 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 951DCD35164 for ; Wed, 1 Apr 2026 09:54:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=WF+twiEG8IwjNK9aOu1zIs2/0wF4Ylc9qGftxmZQrpk=; b=YxTBIE616aZOlKAftJX7W74RWe tn8dt3lIgkFun0r2hnKgxwY3Q0Ht3JewWhlf/fxF22gFKENfcyx2eySeaPjWJqd9P5WlQgIsYmE2Z u0vdmWHNL7UniNuPNeSz5fbur2GOHNI4dW+6O9QtezmomLEVqxKecmwazijey/leqzvQZHYMsbeJT 2FFeP8khW0Sxu+6L2oOKM1D4AP/y55PzCyZ6+IE48djDybCznuUn6F+3n+tH8VeR1F0U3q/jNQLzZ ieIdgda63G8pP2tpNyvyx34I+kQToilxYOYNGCvZp48DrSKErTeVCDra3MrS200WfV6U1/SuA/6ih Ui71asbQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7sH2-0000000ERky-2hOK; Wed, 01 Apr 2026 09:54:08 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7sGz-0000000ERk0-1R3Y for linux-arm-kernel@lists.infradead.org; Wed, 01 Apr 2026 09:54:07 +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 633C1288E; Wed, 1 Apr 2026 02:53:55 -0700 (PDT) Received: from donnerap.manchester.arm.com (donnerap.manchester.arm.com [10.33.8.81]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4CEFC3F7D8; Wed, 1 Apr 2026 02:53:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1775037241; bh=i42+s6XO9ayfJbTxs15bhdHqXGP9BlXksfsMpCDjvl8=; h=From:To:Cc:Subject:Date:From; b=AuZucK64ulnXiFMNDbCSNCc7zF2jvMF8jF7WhLGd2vu35XFWOahxbThVYSDkP1Hia BU78SNhKtUmB4RpmJ9CAeitf+P/YIcpKOEfhYWx/sREcyTPk8SdI5wZhAt0v7IPnhF BPU62wh0TAZffxJWybOvI/g6FrDlOlm7zQqUrMmg= From: Philip Radford To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, arm-scmi@vger.kernel.org, linux-pm@vger.kernel.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, etienne.carriere@st.com, peng.fan@oss.nxp.com, michal.simek@amd.com, quic_sibis@quicinc.com, dan.carpenter@linaro.org, d-gole@ti.com, souvik.chakravarty@arm.com, Philip Radford Subject: [PATCH v4 00/11] Add support for SCMIv4.0 Powercap Extensions Date: Wed, 1 Apr 2026 10:53:38 +0100 Message-ID: <20260401095349.2217840-1-philip.radford@arm.com> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260401_025405_499112_3B61D2E4 X-CRM114-Status: GOOD ( 18.16 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi all, I will be taking over this series from Cristian and in doing so I have addressed a couple of issues raised by the first version and added four additional patches since Cristian's original series: [6/11] exposes the measurement averaging interval (MAI) value when the agent has registered to receive power measurement change notifications for the power capping domain. [9/11] adds MAI get and set support for the powercap protocol. [10/11] introduces a synthetic root zone to act as a common parent for all top-level domains. [11/11] adds get_power_uw to synthetic root zone, summing the per-zone power of immediate child zones. TODO: - Add enable/disable functionality to synthetic root zone to enable/disable immediate children. The original series was based on v6.17-rc1 whereas this version has been based on v7.0-rc4. The rest of Cristian's series is explained below; SCMIv4.0 [1] introduces some new features and commands into the Powercap protocol. In a nutshell, such protocol changes add support for: - setting multiple powercap limit/interval constraints for each SCMI powercap domain which supports multiple Concurrent Power Limit - enabling more Powercap commands to use Fastchannels mechanism - adding multiple constraints support to the existing notifications After a bit of needed updates in the SCMI core this series adds: - support for the idea of optional multiple Concurrent Power Limit (CPLs) - support for the new FCs - support for extended notifications - enable usage of such multiple constraint in the ARM SCMI Powercap driver Note that the public SCMIv4.0 spec at [1] is currently still BETA0, so this series could anyway need some minor rework along the way and definitely will need to wait for a final public release before being possibly merged. Tested on a single and multi-instance scenario on an emulated setup implementing the new protocol extensions. Based on v7.0-rc4. Thanks, Phil --- V3->V4 - Rebased on v7.0-rc4 - Added sythentic parent node and functionality - Moved fastchannel inits outside of loop - Renamed arguments for consistency V2->V3 - Added powercap MAI get/set support V1->V2 - Rebased on sudeep/for-next/scmi/updates - Amended Copyright to include 2026 - Added patch to extend powercap report to include MAI - Removed creation of pi powercap_info struct due to legacy code change - Amended references to pi->version and similar, which were based on legacy code - Wrapped two variables in le32_to_cpu() to appease Sparse warnings - Amended comparing operator value in response to feedback Cristian Marussi (7): firmware: arm_scmi: Add an optional custom parameter to fastchannel helpers firmware: arm_scmi: Refactor powercap domain layout firmware: arm_scmi: Add SCMIv4.0 Powercap basic support firmware: arm_scmi: Add SCMIv4.0 Powercap FCs support firmware: arm_scmi: Add SCMIV4.0 Powercap notifications support include: trace: Add new parameter to trace_scmi_fc_call powercap: arm_scmi: Enable multiple constraints support Philip Radford (4): firmware: arm_scmi: Extend powercap report to include MAI firmware: arm_scmi: add Powercap MAI get/set support powercap: arm_scmi: Create synthetic parent node for multi-instance powercap: arm_scmi: Add get_power_uw to synthetic node drivers/firmware/arm_scmi/driver.c | 12 +- drivers/firmware/arm_scmi/perf.c | 16 +- drivers/firmware/arm_scmi/powercap.c | 984 ++++++++++++++++++++------ drivers/firmware/arm_scmi/protocols.h | 2 +- drivers/powercap/arm_scmi_powercap.c | 146 +++- include/linux/scmi_protocol.h | 87 ++- include/trace/events/scmi.h | 12 +- 7 files changed, 986 insertions(+), 273 deletions(-) -- 2.47.3