From patchwork Wed Nov 29 06:54:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Meng, Li (Jassmine)" X-Patchwork-Id: 13472269 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="eU2b1QOG" Received: from NAM11-DM6-obe.outbound.protection.outlook.com (mail-dm6nam11on2079.outbound.protection.outlook.com [40.107.223.79]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F32319AD; Tue, 28 Nov 2023 22:55:20 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=KySVcIAio5BwsHIKnqOWjiNSwcPLS2K4LJgbQcKOQZZ6sl50sG8yh2TztJgfYkAR9MH7ssBlpT9gVimYh+QG7C6+dKrZR10NkkZH54218q9sPRvWOeQBD9+dKNbyNjwmBMmDkZ6EhJOusgdV4zaMVyrGRp4hRM09a2Vl4G0Q3ctqAMr8cRxrWI6ujJx9helEDlFkJPVMmGi8qbfrD+59THFQLhEjqWsmH/9/ZWurD2wFiUh46Sn6MmTpHhFLj5Feulx39d7yu0MZlK1AEc2/BITBAwGeU8TzUNAZwkiZSaM4osXwQ9GvRzRFNIbr5jrP7z8UFi7KpyfdYVQjl6wKmw== 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=agG3WjWQm9LbsC/s5I+FFl0Buz9G0pMPDTL9zOrMnOw=; b=Z+UnPbjDO1dLEwtaFzIqYm+heGXtXuuCAQWVIPshWB1FdFwJbwD3J+7Q54mWBej0JN00jALFxolD6HSPzRPmY6Gyz4zSxTJm5oETEBjVL4VHZAL4tRJioZvmdxJj3ms/e/OmKuT2w6JZWxmAzoCdBPYvrM0Ur8BQp3lCx5PJVJl5Jvpngf3rhZLhpqjBe7C8+Es17ScVyfkwsDSve+Tpx87rBiM478GCHVhMAMPzbRhA5c81TGYZoe4JcnM7DqxrxPCfTQAJXMaPFtCQFYXhOK0i/mwRnriuL5OrXYgVUjEVdczVXx3giQNTkAF0pMY7BpNba9jhWXhFUiWZE41EUQ== 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=agG3WjWQm9LbsC/s5I+FFl0Buz9G0pMPDTL9zOrMnOw=; b=eU2b1QOG09JNfoQNUmMBpfMGnkTxByQLoxnSpEgG4gfZLzniHuB2LKCSDvktI5yiwVho1lOO21jCOkKrDfJw6GAO+HSFYJs/nvKVoWKJDjDz4meIpID5ZHYkCwQrWww7zUKQSoLfr698nawxiDP6uvDs9/Rt4boxKHycQZUolnA= Received: from PR3P192CA0024.EURP192.PROD.OUTLOOK.COM (2603:10a6:102:56::29) by DS0PR12MB6654.namprd12.prod.outlook.com (2603:10b6:8:d1::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7046.22; Wed, 29 Nov 2023 06:55:17 +0000 Received: from SN1PEPF0002BA51.namprd03.prod.outlook.com (2603:10a6:102:56:cafe::b7) by PR3P192CA0024.outlook.office365.com (2603:10a6:102:56::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7025.27 via Frontend Transport; Wed, 29 Nov 2023 06:55:16 +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 SN1PEPF0002BA51.mail.protection.outlook.com (10.167.242.74) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7046.17 via Frontend Transport; Wed, 29 Nov 2023 06:55:16 +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; Wed, 29 Nov 2023 00:55:10 -0600 From: Meng Li To: "Rafael J . Wysocki" , 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 V11 3/7] cpufreq: amd-pstate: Enable amd-pstate preferred core supporting. Date: Wed, 29 Nov 2023 14:54:33 +0800 Message-ID: <20231129065437.290183-4-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231129065437.290183-1-li.meng@amd.com> References: <20231129065437.290183-1-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: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002BA51:EE_|DS0PR12MB6654:EE_ X-MS-Office365-Filtering-Correlation-Id: 41dfee9f-1f70-4212-254d-08dbf0a824b5 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)(39860400002)(136003)(376002)(346002)(230922051799003)(451199024)(186009)(1800799012)(64100799003)(82310400011)(46966006)(40470700004)(36840700001)(70206006)(70586007)(6636002)(316002)(54906003)(40460700003)(336012)(426003)(7696005)(478600001)(81166007)(36860700001)(82740400003)(83380400001)(36756003)(86362001)(2616005)(5660300002)(7416002)(8936002)(8676002)(1076003)(40480700001)(4326008)(41300700001)(47076005)(356005)(6666004)(110136005)(26005)(2906002)(16526019)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Nov 2023 06:55:16.3299 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 41dfee9f-1f70-4212-254d-08dbf0a824b5 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: SN1PEPF0002BA51.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB6654 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 | 141 +++++++++++++++++++++++++++++++---- include/linux/amd-pstate.h | 4 + 2 files changed, 129 insertions(+), 16 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 9a1e194d5cf8..74dcf63d75f9 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) @@ -290,23 +293,21 @@ static inline int amd_pstate_enable(bool enable) static int pstate_init_perf(struct amd_cpudata *cpudata) { u64 cap1; - u32 highest_perf; int ret = rdmsrl_safe_on_cpu(cpudata->cpu, MSR_AMD_CPPC_CAP1, &cap1); 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)) - highest_perf = AMD_CPPC_HIGHEST_PERF(cap1); - - WRITE_ONCE(cpudata->highest_perf, highest_perf); + if (cpudata->hw_prefcore) + WRITE_ONCE(cpudata->highest_perf, AMD_PSTATE_PREFCORE_THRESHOLD); + else + WRITE_ONCE(cpudata->highest_perf, AMD_CPPC_HIGHEST_PERF(cap1)); WRITE_ONCE(cpudata->nominal_perf, AMD_CPPC_NOMINAL_PERF(cap1)); WRITE_ONCE(cpudata->lowest_nonlinear_perf, AMD_CPPC_LOWNONLIN_PERF(cap1)); @@ -318,17 +319,15 @@ static int pstate_init_perf(struct amd_cpudata *cpudata) static int cppc_init_perf(struct amd_cpudata *cpudata) { struct cppc_perf_caps cppc_perf; - u32 highest_perf; int ret = cppc_get_perf_caps(cpudata->cpu, &cppc_perf); if (ret) return ret; - highest_perf = amd_get_highest_perf(); - if (highest_perf > cppc_perf.highest_perf) - highest_perf = cppc_perf.highest_perf; - - WRITE_ONCE(cpudata->highest_perf, highest_perf); + if (cpudata->hw_prefcore) + WRITE_ONCE(cpudata->highest_perf, AMD_PSTATE_PREFCORE_THRESHOLD); + else + WRITE_ONCE(cpudata->highest_perf, cppc_perf.highest_perf); WRITE_ONCE(cpudata->nominal_perf, cppc_perf.nominal_perf); WRITE_ONCE(cpudata->lowest_nonlinear_perf, @@ -676,6 +675,80 @@ 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; @@ -697,6 +770,8 @@ 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; @@ -845,6 +920,17 @@ 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) { @@ -1037,18 +1123,27 @@ 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, }; @@ -1056,6 +1151,7 @@ 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, @@ -1063,6 +1159,7 @@ static struct freq_attr *amd_pstate_epp_attr[] = { static struct attribute *pstate_global_attributes[] = { &dev_attr_status.attr, + &dev_attr_prefcore.attr, NULL }; @@ -1114,6 +1211,8 @@ 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; @@ -1527,7 +1626,17 @@ 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 446394f84606..87e140e9e6db 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 @@ -81,6 +84,7 @@ struct amd_cpudata { u64 freq; bool boost_supported; + bool hw_prefcore; /* EPP feature related attributes*/ s16 epp_policy;