From nobody Tue Apr 7 01:53:16 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 65DF1C433FE for ; Sun, 9 Oct 2022 07:12:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230061AbiJIHMY (ORCPT ); Sun, 9 Oct 2022 03:12:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41812 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230029AbiJIHLr (ORCPT ); Sun, 9 Oct 2022 03:11:47 -0400 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on2066.outbound.protection.outlook.com [40.107.93.66]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E472A3336B; Sun, 9 Oct 2022 00:11:42 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=e0kEvmq7Fu7Q8VQY2WaFXM3f/F3KMZMAFi/eqVg84WsAnKjMuDgC3II+3nIbD3It8t4rqkroWm/ZpfWh7oAkuo83AtsQ2SnJy+7UEMCH9dWC+G5LeWiAudcqMPW1Um/lEHiuMzg7IpY5Es0UkKfLOWLcvZ+aueGrEbX6PkcMBkiDH89SDmj5mcvq5FSup6049XKd3KtwRmR+umJmVcPDxq/af8zpPolwNaTqwbh4szwlQ5+lMong0Jr81ND0JyT7DEODDBPDguyGto2+T8DzAmujaURx8m+WRQN2EfwLfjJlPisQjGnRz4TyUnM59VDeQdX4kPeaS64LtGFx4zSrIA== 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=YmeL10S28uUxf7CpfSdZCwsk0jld7opG7DXjhiKE7Dw=; b=Ks6H4RKNd5tfeZ/7zgdQkoOtpCSerbsnLIFaz5gH713RUOt3h6vUcdQZ2vciWJAY89QjjDZJZGb508vdLjMJnIep+UCmeppBDyNSlN+vPykbAT+ppsVas7O7FHdQE2Ycz1aE3X1kay1Fe+jWL88lEmjuO9z9A7pzUh8bCaHp/4mDt+ZhzQceRj+kN5NiICCat1PyPYZv51G4qsM9roI7ITHHbWxutTnoJjyFsQFesT6wnMdjd1/skJmI/SQ7tFCl4kdE5RpTycYPJHTEXr7X8fUQzq5uYY/CtSkrp3BW7FhExWKk51+0UBbkSyi/b/9ibepyJPP/VtAIhbhfw58D8g== 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=YmeL10S28uUxf7CpfSdZCwsk0jld7opG7DXjhiKE7Dw=; b=L4JfLYdCoqzP+4iAcUwTSZI1YseYJDX1r94fEE+qWuMByc0grZXlPfC6sy+2ipukr6iDxM51jykayjs89a17HHtbMF9OYtVmlNVW3d6zfApMGSDTE3ohLI32CIsHvwxT5+/rB1Hd5VZmvfx8xiD8S7yZ4DYFXj+TLaC11Uv7+AI= Received: from DS7P222CA0004.NAMP222.PROD.OUTLOOK.COM (2603:10b6:8:2e::14) by BY5PR12MB4260.namprd12.prod.outlook.com (2603:10b6:a03:206::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5709.15; Sun, 9 Oct 2022 07:11:39 +0000 Received: from DM6NAM11FT046.eop-nam11.prod.protection.outlook.com (2603:10b6:8:2e:cafe::a0) by DS7P222CA0004.outlook.office365.com (2603:10b6:8:2e::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5709.15 via Frontend Transport; Sun, 9 Oct 2022 07:11:39 +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 DM6NAM11FT046.mail.protection.outlook.com (10.13.172.121) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5709.10 via Frontend Transport; Sun, 9 Oct 2022 07:11:39 +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 15.1.2375.28; Sun, 9 Oct 2022 02:11:35 -0500 From: Perry Yuan To: , , CC: , , , , , , , , , Perry Yuan Subject: [PATCH v2 9/9] cpufreq: amd-pstate: implement suspend and resume callbacks Date: Sun, 9 Oct 2022 15:10:33 +0800 Message-ID: <20221009071033.21170-10-Perry.Yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221009071033.21170-1-Perry.Yuan@amd.com> References: <20221009071033.21170-1-Perry.Yuan@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: DM6NAM11FT046:EE_|BY5PR12MB4260:EE_ X-MS-Office365-Filtering-Correlation-Id: 42928b30-f3a0-4e9f-4c13-08daa9c582a9 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:(13230022)(4636009)(396003)(39850400004)(376002)(346002)(136003)(451199015)(46966006)(40470700004)(36840700001)(8936002)(426003)(81166007)(47076005)(82310400005)(5660300002)(8676002)(4326008)(41300700001)(2616005)(16526019)(1076003)(186003)(70206006)(83380400001)(70586007)(336012)(36860700001)(7696005)(36756003)(86362001)(478600001)(356005)(82740400003)(26005)(15650500001)(316002)(54906003)(110136005)(40460700003)(2906002)(40480700001)(36900700001)(2101003);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Oct 2022 07:11:39.1506 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 42928b30-f3a0-4e9f-4c13-08daa9c582a9 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: DM6NAM11FT046.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4260 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" add suspend and resume support for the AMD processors by amd_pstate_epp driver instance. When the CPPC is suspended, EPP driver will set EPP profile to 'power' profile and set max/min perf to lowest perf value. When resume happens, it will restore the MSR registers with previous cached value. Signed-off-by: Perry Yuan --- drivers/cpufreq/amd-pstate.c | 40 ++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 1a3ecc2e148a..f93336f69756 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -1473,6 +1473,44 @@ static int amd_pstate_epp_cpu_offline(struct cpufreq= _policy *policy) return amd_pstate_cpu_offline(policy); } =20 +static int amd_pstate_epp_suspend(struct cpufreq_policy *policy) +{ + struct amd_cpudata *cpudata =3D all_cpu_data[policy->cpu]; + int ret; + + /* avoid suspending when EPP is not enabled */ + if (!epp_enabled) + return 0; + + /* set this flag to avoid setting core offline*/ + cpudata->suspended =3D true; + + /* disable CPPC in lowlevel firmware */ + ret =3D amd_pstate_enable(false); + if (ret) + pr_err("failed to suspend, return %d\n", ret); + + return 0; +} + +static int amd_pstate_epp_resume(struct cpufreq_policy *policy) +{ + struct amd_cpudata *cpudata =3D all_cpu_data[policy->cpu]; + + if (cpudata->suspended) { + mutex_lock(&amd_pstate_limits_lock); + + /* enable amd pstate from suspend state*/ + amd_pstate_epp_reenable(cpudata); + + mutex_unlock(&amd_pstate_limits_lock); + + cpudata->suspended =3D false; + } + + return 0; +} + static void amd_pstate_verify_cpu_policy(struct amd_cpudata *cpudata, struct cpufreq_policy_data *policy) { @@ -1509,6 +1547,8 @@ static struct cpufreq_driver amd_pstate_epp_driver = =3D { .update_limits =3D amd_pstate_epp_update_limits, .offline =3D amd_pstate_epp_cpu_offline, .online =3D amd_pstate_epp_cpu_online, + .suspend =3D amd_pstate_epp_suspend, + .resume =3D amd_pstate_epp_resume, .name =3D "amd_pstate_epp", .attr =3D amd_pstate_epp_attr, }; --=20 2.34.1