From patchwork Fri Jan 12 09:25:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Meng, Li \(Jassmine\)" X-Patchwork-Id: 762583 Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12on2050.outbound.protection.outlook.com [40.107.243.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D003A5D916; Fri, 12 Jan 2024 09:26:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="3uas+V3m" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=nk01hgNrSUr41e46Lerpb2JB0Rv8Fi8zQgjVha82mnRwfa+DXslZEpBuCBScfO7eMfBXcRTVmaa4CXG9lU/GYAsi2fevVMLNMcEhnGy6/3DDf/C15ZppszWIVfxlAoynnjqCKsmf396aMh18MjPXIdaKyhV4Q6g56MXnH0KWmVfGMcYKjIquVfE65fLhSk8Bjs+9oQStpiD1UB1WOY5EedRNQCTFaK2L0nlfVWorbwxHZP0E7Fpt44nq4kxkcx+OtvAsK5v/DUCUm8w9cEtt2fPIQCnbQT3PxQBXmwHIfiP9fiIkiB0iAguGNgZpr1v19ugQfKpJO6PaRW9reXheQQ== 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=XmBnlY6CcyhnNSPEQizfeQBw6AAo8AGdk2azpcvOOtI=; b=eA9pqmwfAIOGmCDF+Y42qCTSyH6kDURTaRE4Mw6VO1LDlI6+UAvMc3E7Hf7/XuIp4sC4hrYifg/xTrNGNAstbmAvZB5i7OBZ5P9r2GXg6ggNKyFsA3iV2Nu1iVXsqRT3p6NRBmOV094p2WK3ES3LYR5I7cgmi2kKgpcS3kch3WX3jHOCDhJ9ao7DtCccs56cPiF5c6i8uObAZ5Cg5PZbp2DEAfGrYVTKZe7+D+wpPCgqYHrujIuu7oQhqOquqOSAYRhvVrDVqdsFuGa0XPZF86kD7gQSIWhW3a30t9SiSyIOoClBM//sVeVllcyRV9+ccOgNiFa+k+eJST3g6GihSQ== 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 (0) 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=XmBnlY6CcyhnNSPEQizfeQBw6AAo8AGdk2azpcvOOtI=; b=3uas+V3m/Cz1pdguYX4tZ0XABGQs4Z+mDQqtOyiQdgWGPrMzOWc58fxUTxJr6cvmM2ZiosTbbbO51WjeFHYwl+cXCxxDpdABHcmdIKmBw8CN7lfB2BYH5DRFX4Nm0uj2xKdSSgES2Yws8ScUanq764u9KxXQ/bKV9axfeC+c34Q= Received: from DS7PR03CA0266.namprd03.prod.outlook.com (2603:10b6:5:3b3::31) by DM6PR12MB4942.namprd12.prod.outlook.com (2603:10b6:5:1be::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7181.21; Fri, 12 Jan 2024 09:26:06 +0000 Received: from DS1PEPF00017095.namprd03.prod.outlook.com (2603:10b6:5:3b3:cafe::21) by DS7PR03CA0266.outlook.office365.com (2603:10b6:5:3b3::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7181.21 via Frontend Transport; Fri, 12 Jan 2024 09:26:06 +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 DS1PEPF00017095.mail.protection.outlook.com (10.167.17.138) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7181.13 via Frontend Transport; Fri, 12 Jan 2024 09:26:06 +0000 Received: from jasmine-meng.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 15.1.2507.34; Fri, 12 Jan 2024 03:26:01 -0600 From: Meng Li To: "Rafael J . Wysocki" , Borislav Petkov , Huang Rui CC: , , , , Shuah Khan , , "Nathan Fontenot" , Deepak Sharma , Alex Deucher , Mario Limonciello , Shimmer Huang , "Perry Yuan" , Xiaojian Du , Viresh Kumar , Borislav Petkov , "Oleksandr Natalenko" , Meng Li , Wyes Karny Subject: [PATCH V13 3/7] cpufreq: amd-pstate: Enable amd-pstate preferred core supporting. Date: Fri, 12 Jan 2024 17:25:27 +0800 Message-ID: <20240112092531.789841-4-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240112092531.789841-1-li.meng@amd.com> References: <20240112092531.789841-1-li.meng@amd.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: DS1PEPF00017095:EE_|DM6PR12MB4942:EE_ X-MS-Office365-Filtering-Correlation-Id: da08a108-9595-4cd3-2a06-08dc1350815a 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:(13230031)(4636009)(396003)(136003)(39860400002)(376002)(346002)(230922051799003)(451199024)(64100799003)(1800799012)(82310400011)(186009)(40470700004)(46966006)(36840700001)(336012)(83380400001)(1076003)(16526019)(426003)(47076005)(26005)(2616005)(36860700001)(316002)(7416002)(6636002)(110136005)(54906003)(70206006)(5660300002)(4326008)(70586007)(8936002)(8676002)(6666004)(7696005)(86362001)(478600001)(41300700001)(2906002)(36756003)(356005)(82740400003)(81166007)(40460700003)(40480700001)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Jan 2024 09:26:06.7311 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: da08a108-9595-4cd3-2a06-08dc1350815a 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: DS1PEPF00017095.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4942 amd-pstate driver utilizes the functions and data structures provided by the ITMT architecture to enable the scheduler to favor scheduling on cores which can be get a higher frequency with lower voltage. We call it amd-pstate preferrred core. Here sched_set_itmt_core_prio() is called to set priorities and sched_set_itmt_support() is called to enable ITMT feature. amd-pstate driver uses the highest performance value to indicate the priority of CPU. The higher value has a higher priority. The initial core rankings are set up by amd-pstate when the system boots. Add a variable hw_prefcore in cpudata structure. It will check if the processor and power firmware support preferred core feature. Add one new early parameter `disable` to allow user to disable the preferred core. Only when hardware supports preferred core and user set `enabled` in early parameter, amd pstate driver supports preferred core featue. Tested-by: Oleksandr Natalenko Reviewed-by: Huang Rui Reviewed-by: Wyes Karny Reviewed-by: Mario Limonciello Co-developed-by: Perry Yuan Signed-off-by: Perry Yuan Signed-off-by: Meng Li --- drivers/cpufreq/amd-pstate.c | 131 ++++++++++++++++++++++++++++++++--- include/linux/amd-pstate.h | 4 ++ 2 files changed, 127 insertions(+), 8 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 1f6186475715..9c2790753f99 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -37,6 +37,7 @@ #include #include #include +#include #include #include @@ -49,6 +50,7 @@ #define AMD_PSTATE_TRANSITION_LATENCY 20000 #define AMD_PSTATE_TRANSITION_DELAY 1000 +#define AMD_PSTATE_PREFCORE_THRESHOLD 166 /* * TODO: We need more time to fine tune processors with shared memory solution @@ -64,6 +66,7 @@ static struct cpufreq_driver amd_pstate_driver; static struct cpufreq_driver amd_pstate_epp_driver; static int cppc_state = AMD_PSTATE_UNDEFINED; static bool cppc_enabled; +static bool amd_pstate_prefcore = true; /* * AMD Energy Preference Performance (EPP) @@ -297,13 +300,14 @@ static int pstate_init_perf(struct amd_cpudata *cpudata) if (ret) return ret; - /* - * TODO: Introduce AMD specific power feature. - * - * CPPC entry doesn't indicate the highest performance in some ASICs. + /* For platforms that do not support the preferred core feature, the + * highest_pef may be configured with 166 or 255, to avoid max frequency + * calculated wrongly. we take the AMD_CPPC_HIGHEST_PERF(cap1) value as + * the default max perf. */ - highest_perf = amd_get_highest_perf(); - if (highest_perf > AMD_CPPC_HIGHEST_PERF(cap1)) + if (cpudata->hw_prefcore) + highest_perf = AMD_PSTATE_PREFCORE_THRESHOLD; + else highest_perf = AMD_CPPC_HIGHEST_PERF(cap1); WRITE_ONCE(cpudata->highest_perf, highest_perf); @@ -324,8 +328,9 @@ static int cppc_init_perf(struct amd_cpudata *cpudata) if (ret) return ret; - highest_perf = amd_get_highest_perf(); - if (highest_perf > cppc_perf.highest_perf) + if (cpudata->hw_prefcore) + highest_perf = AMD_PSTATE_PREFCORE_THRESHOLD; + else highest_perf = cppc_perf.highest_perf; WRITE_ONCE(cpudata->highest_perf, highest_perf); @@ -706,6 +711,80 @@ static void amd_perf_ctl_reset(unsigned int cpu) wrmsrl_on_cpu(cpu, MSR_AMD_PERF_CTL, 0); } +/* + * Set amd-pstate preferred core enable can't be done directly from cpufreq callbacks + * due to locking, so queue the work for later. + */ +static void amd_pstste_sched_prefcore_workfn(struct work_struct *work) +{ + sched_set_itmt_support(); +} +static DECLARE_WORK(sched_prefcore_work, amd_pstste_sched_prefcore_workfn); + +/* + * Get the highest performance register value. + * @cpu: CPU from which to get highest performance. + * @highest_perf: Return address. + * + * Return: 0 for success, -EIO otherwise. + */ +static int amd_pstate_get_highest_perf(int cpu, u32 *highest_perf) +{ + int ret; + + if (boot_cpu_has(X86_FEATURE_CPPC)) { + u64 cap1; + + ret = rdmsrl_safe_on_cpu(cpu, MSR_AMD_CPPC_CAP1, &cap1); + if (ret) + return ret; + WRITE_ONCE(*highest_perf, AMD_CPPC_HIGHEST_PERF(cap1)); + } else { + u64 cppc_highest_perf; + + ret = cppc_get_highest_perf(cpu, &cppc_highest_perf); + if (ret) + return ret; + WRITE_ONCE(*highest_perf, cppc_highest_perf); + } + + return (ret); +} + +#define CPPC_MAX_PERF U8_MAX + +static void amd_pstate_init_prefcore(struct amd_cpudata *cpudata) +{ + int ret, prio; + u32 highest_perf; + + ret = amd_pstate_get_highest_perf(cpudata->cpu, &highest_perf); + if (ret) + return; + + cpudata->hw_prefcore = true; + /* check if CPPC preferred core feature is enabled*/ + if (highest_perf < CPPC_MAX_PERF) + prio = (int)highest_perf; + else { + pr_debug("AMD CPPC preferred core is unsupported!\n"); + cpudata->hw_prefcore = false; + return; + } + + if (!amd_pstate_prefcore) + return; + + /* + * The priorities can be set regardless of whether or not + * sched_set_itmt_support(true) has been called and it is valid to + * update them at any time after it has been called. + */ + sched_set_itmt_core_prio(prio, cpudata->cpu); + + schedule_work(&sched_prefcore_work); +} + static int amd_pstate_cpu_init(struct cpufreq_policy *policy) { int min_freq, max_freq, nominal_freq, lowest_nonlinear_freq, ret; @@ -727,6 +806,8 @@ static int amd_pstate_cpu_init(struct cpufreq_policy *policy) cpudata->cpu = policy->cpu; + amd_pstate_init_prefcore(cpudata); + ret = amd_pstate_init_perf(cpudata); if (ret) goto free_cpudata1; @@ -877,6 +958,17 @@ static ssize_t show_amd_pstate_highest_perf(struct cpufreq_policy *policy, return sysfs_emit(buf, "%u\n", perf); } +static ssize_t show_amd_pstate_hw_prefcore(struct cpufreq_policy *policy, + char *buf) +{ + bool hw_prefcore; + struct amd_cpudata *cpudata = policy->driver_data; + + hw_prefcore = READ_ONCE(cpudata->hw_prefcore); + + return sysfs_emit(buf, "%s\n", str_enabled_disabled(hw_prefcore)); +} + static ssize_t show_energy_performance_available_preferences( struct cpufreq_policy *policy, char *buf) { @@ -1074,18 +1166,27 @@ static ssize_t status_store(struct device *a, struct device_attribute *b, return ret < 0 ? ret : count; } +static ssize_t prefcore_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%s\n", str_enabled_disabled(amd_pstate_prefcore)); +} + cpufreq_freq_attr_ro(amd_pstate_max_freq); cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_freq); cpufreq_freq_attr_ro(amd_pstate_highest_perf); +cpufreq_freq_attr_ro(amd_pstate_hw_prefcore); cpufreq_freq_attr_rw(energy_performance_preference); cpufreq_freq_attr_ro(energy_performance_available_preferences); static DEVICE_ATTR_RW(status); +static DEVICE_ATTR_RO(prefcore); static struct freq_attr *amd_pstate_attr[] = { &amd_pstate_max_freq, &amd_pstate_lowest_nonlinear_freq, &amd_pstate_highest_perf, + &amd_pstate_hw_prefcore, NULL, }; @@ -1093,6 +1194,7 @@ static struct freq_attr *amd_pstate_epp_attr[] = { &amd_pstate_max_freq, &amd_pstate_lowest_nonlinear_freq, &amd_pstate_highest_perf, + &amd_pstate_hw_prefcore, &energy_performance_preference, &energy_performance_available_preferences, NULL, @@ -1100,6 +1202,7 @@ static struct freq_attr *amd_pstate_epp_attr[] = { static struct attribute *pstate_global_attributes[] = { &dev_attr_status.attr, + &dev_attr_prefcore.attr, NULL }; @@ -1151,6 +1254,8 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy) cpudata->cpu = policy->cpu; cpudata->epp_policy = 0; + amd_pstate_init_prefcore(cpudata); + ret = amd_pstate_init_perf(cpudata); if (ret) goto free_cpudata1; @@ -1568,7 +1673,17 @@ static int __init amd_pstate_param(char *str) return amd_pstate_set_driver(mode_idx); } + +static int __init amd_prefcore_param(char *str) +{ + if (!strcmp(str, "disable")) + amd_pstate_prefcore = false; + + return 0; +} + early_param("amd_pstate", amd_pstate_param); +early_param("amd_prefcore", amd_prefcore_param); MODULE_AUTHOR("Huang Rui "); MODULE_DESCRIPTION("AMD Processor P-state Frequency Driver"); diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h index 6ad02ad9c7b4..68fc1bd8d851 100644 --- a/include/linux/amd-pstate.h +++ b/include/linux/amd-pstate.h @@ -52,6 +52,9 @@ struct amd_aperf_mperf { * @prev: Last Aperf/Mperf/tsc count value read from register * @freq: current cpu frequency value * @boost_supported: check whether the Processor or SBIOS supports boost mode + * @hw_prefcore: check whether HW supports preferred core featue. + * Only when hw_prefcore and early prefcore param are true, + * AMD P-State driver supports preferred core featue. * @epp_policy: Last saved policy used to set energy-performance preference * @epp_cached: Cached CPPC energy-performance preference value * @policy: Cpufreq policy value @@ -85,6 +88,7 @@ struct amd_cpudata { u64 freq; bool boost_supported; + bool hw_prefcore; /* EPP feature related attributes*/ s16 epp_policy;