From patchwork Tue Jan 31 09:00:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yuan, Perry" X-Patchwork-Id: 50752 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp2642299wrn; Tue, 31 Jan 2023 01:06:50 -0800 (PST) X-Google-Smtp-Source: AMrXdXu0TyjvqhdryaSIj4xiY8OoDP5PeITN49AX1vmTGwEugd3yoJ50fXgTWQYGGNpvWZMQHDtc X-Received: by 2002:a17:902:e845:b0:192:f45e:4197 with SMTP id t5-20020a170902e84500b00192f45e4197mr69400217plg.31.1675156010356; Tue, 31 Jan 2023 01:06:50 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1675156010; cv=pass; d=google.com; s=arc-20160816; b=Ylz7itVLoeCeIBzgQpipAZTJ6Et1wRuME7hEM9OvQ7Z9w6/NWWzLPDOtRlosg0twPM iHNY3K+6mKbIuidRJJlwK4lRiuC8QifDPV6xSz++sThY+IA/td3w6jlsSbAdZ0WyPhD1 02cjOZtYaGiBag3wNTBl5OCmwvQS/IyTyj31gj55opDcR74VSk7aMfQhSeoVqbI3r4HL Gbuk8YU+M+gTMz5MKmjPHrLtYu9KoDJklk/rbkpRVUoABwloJ2Vd4rHJXKHOWujOcil2 QploHvWqavDat5AqU74WgnYCwaw01Bq2VlQxzT7SxO8qJIsrOL5s47Oa7Q4d7T3dCKIq upkQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=vyOpI1A31sBbiW86PCnSi346nGCq0fCrhlK2GZy2w7g=; b=NI7IA0ubXPrrgO7ambZ8uO/r2KpuOIsmg9zwixlyec57Qn8wZdnnckjgDyPKZ237hg J0/CYyA6z5r22/WI4vjrX58YoAt4f/Hg+Gatv66CncrXJKorNBQ4unYCCJR+iVcT2PQa ThVvDABkMTHtOkEJWMfh7zr16hufUrFAuoNuxLXpfcihG9lff5SLamOfsY/20ncCHpeI kCFLNysoIv9jZEEDKtG1zyhVgdgWnvU3tKteYxeYvJPtKRkmP2Eo+dJIWO73wgAjmjiK tUJcPjjLgeN8B65IPARFxDEc01u/1L9DsL2X1EGF82ELsqfADHZN998+vHSItTluVmko Mi2Q== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b=lOqT+02R; arc=pass (i=1 spf=pass spfdomain=amd.com dmarc=pass fromdomain=amd.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amd.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id f11-20020a17090274cb00b0019655211788si12534278plt.130.2023.01.31.01.06.38; Tue, 31 Jan 2023 01:06:50 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b=lOqT+02R; arc=pass (i=1 spf=pass spfdomain=amd.com dmarc=pass fromdomain=amd.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amd.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232411AbjAaJF5 (ORCPT + 99 others); Tue, 31 Jan 2023 04:05:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232140AbjAaJFX (ORCPT ); Tue, 31 Jan 2023 04:05:23 -0500 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (mail-bn8nam11on2041.outbound.protection.outlook.com [40.107.236.41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9306510C4; Tue, 31 Jan 2023 01:01:49 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=BBMhvxxm8BfrzFykJ+nu4nF0Y3PPZ5e2csmfz7MhDPtCeOgPa3tGjeoflXPOCVvZ/43q2SGz35xTZKQUEqs812+ETyEa8KQ9YaCDNj1ltCC8EZyugyzzatk0Paixa3xFxHHwMG6akdd5/Aabx2n4YgGIfqCE8OatotuV+ZFIfr9NqzIuG1oJy/n0y7eYJ/incCmiZJnnZhS+bejr68+e8Z3Uf3jWDyKtbmZwInhYSrf+wDr7KtjQO7eqm3qhzisOv18ojDPbExn3DXn6vIdzdJeCkCPo5u0sD+LYXvGVsEVkxNW/zkkm48c4qaY6/rNeN49z7KUs7htBXDA0FqqkkA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=vyOpI1A31sBbiW86PCnSi346nGCq0fCrhlK2GZy2w7g=; b=WnXulQBIYEoeV9CkzZaSgJ+kZ0Hz0zG2f0fENxTED2EctXQdy9DfmyY8FYcc7r5Wluu+oALssu6Z/6jBF7rt/o4pHuJI97aRJ0NMHPUJtLjkFYfYyignJqzY3ufh+jFWodwR9Zn5bIq4wu45AlwBr6X6QHVtcqW0TnyqdqIrvnZWk6KPm1LG7J5qGAu9FQp9JGW4Zb4AJnkxDIv0AmRzj4Y8XLz+2p0WBQACcXLnNIGqLDRskoQnjDXTqPlpJD1n4EVwKSQ/ofrYkagprWAGrw6hqEkigd2pxbYP/Wl0WK6yyDhSk7R7nt/PsqMv2AYNBpYmh7sFAWXcZWuYVEKJRQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=intel.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=vyOpI1A31sBbiW86PCnSi346nGCq0fCrhlK2GZy2w7g=; b=lOqT+02RQ2aWDdm3nnv+kdxOUwpx0VNzbVj7e1O8aJ6EfHlwCe3AIBLV7e76jV9Lx0037Re7G12Lm/JXNsdBwH9pGbqkSVYtI3wmc2Akbq7GUg0v6EdX4gsyQ+SMcUQMIUQwHGjk9SAwEa214LdDDPqOLL1keZbHhp8lN5dWlKg= Received: from MW4PR03CA0261.namprd03.prod.outlook.com (2603:10b6:303:b4::26) by BL3PR12MB6450.namprd12.prod.outlook.com (2603:10b6:208:3b9::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.36; Tue, 31 Jan 2023 09:01:12 +0000 Received: from CO1NAM11FT046.eop-nam11.prod.protection.outlook.com (2603:10b6:303:b4:cafe::1b) by MW4PR03CA0261.outlook.office365.com (2603:10b6:303:b4::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.38 via Frontend Transport; Tue, 31 Jan 2023 09:01:12 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CO1NAM11FT046.mail.protection.outlook.com (10.13.174.203) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6043.23 via Frontend Transport; Tue, 31 Jan 2023 09:01:12 +0000 Received: from pyuan-Cloudripper.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Tue, 31 Jan 2023 03:01:08 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v12 08/11] Documentation: amd-pstate: add amd pstate driver mode introduction Date: Tue, 31 Jan 2023 17:00:13 +0800 Message-ID: <20230131090016.3970625-9-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230131090016.3970625-1-perry.yuan@amd.com> References: <20230131090016.3970625-1-perry.yuan@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT046:EE_|BL3PR12MB6450:EE_ X-MS-Office365-Filtering-Correlation-Id: 2159cf00-2342-4488-0bc8-08db0369b3c6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(376002)(136003)(39860400002)(396003)(346002)(451199018)(36840700001)(46966006)(40470700004)(4326008)(8676002)(70206006)(70586007)(8936002)(316002)(54906003)(110136005)(44832011)(5660300002)(41300700001)(2906002)(1076003)(7696005)(478600001)(6666004)(356005)(186003)(2616005)(26005)(336012)(16526019)(36756003)(40460700003)(83380400001)(426003)(47076005)(36860700001)(82310400005)(82740400003)(86362001)(40480700001)(81166007)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Jan 2023 09:01:12.3888 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2159cf00-2342-4488-0bc8-08db0369b3c6 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT046.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB6450 X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1756528388399233753?= X-GMAIL-MSGID: =?utf-8?q?1756528388399233753?= From: Perry Yuan The amd-pstate driver has two operation modes supported: * CPPC Autonomous (active) mode * CPPC non-autonomous (passive) mode. active mode and passive mode can be chosen by different kernel parameters. Acked-by: Huang Rui Reviewed-by: Mario Limonciello Reviewed-by: Wyes Karny Tested-by: Wyes Karny Signed-off-by: Perry Yuan --- Documentation/admin-guide/pm/amd-pstate.rst | 26 +++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst index 98a2bb44f80c..b6aee69f564f 100644 --- a/Documentation/admin-guide/pm/amd-pstate.rst +++ b/Documentation/admin-guide/pm/amd-pstate.rst @@ -299,8 +299,30 @@ module which supports the new AMD P-States mechanism on most of the future AMD platforms. The AMD P-States mechanism is the more performance and energy efficiency frequency management method on AMD processors. -Kernel Module Options for ``amd-pstate`` -========================================= + +AMD Pstate Driver Operation Modes +================================= + +``amd_pstate`` CPPC has two operation modes: CPPC Autonomous(active) mode and +CPPC non-autonomous(passive) mode. +active mode and passive mode can be chosen by different kernel parameters. +When in Autonomous mode, CPPC ignores requests done in the Desired Performance +Target register and takes into account only the values set to the Minimum requested +performance, Maximum requested performance, and Energy Performance Preference +registers. When Autonomous is disabled, it only considers the Desired Performance Target. + +Active Mode +------------ + +``amd_pstate=active`` + +This is the low-level firmware control mode which is implemented by ``amd_pstate_epp`` +driver with ``amd_pstate=active`` passed to the kernel in the command line. +In this mode, ``amd_pstate_epp`` driver provides a hint to the hardware if software +wants to bias toward performance (0x0) or energy efficiency (0xff) to the CPPC firmware. +then CPPC power algorithm will calculate the runtime workload and adjust the realtime +cores frequency according to the power supply and thermal, core voltage and some other +hardware conditions. Passive Mode ------------