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Wysocki" , Huang Rui , CC: Nathan Fontenot , Deepak Sharma , Alex Deucher , "Mario Limonciello" , Jinzhou Su , Perry Yuan , Xiaojian Du , "Viresh Kumar" , Borislav Petkov , , Meng Li Subject: [PATCH 1/3] cpufreq: amd-pstate: Expose struct amd_cpudata Date: Wed, 13 Apr 2022 17:05:08 +0800 Message-ID: <20220413090510.4039589-2-li.meng@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220413090510.4039589-1-li.meng@amd.com> References: <20220413090510.4039589-1-li.meng@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-Office365-Filtering-Correlation-Id: d352b309-ae0b-415e-0122-08da1d2ce693 X-MS-TrafficTypeDiagnostic: MW5PR12MB5598:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: syYFovIqM3Wp82a04zOyRSXGEKTvkRIp/z1dmB08CAN8V/4D7ES+4BsOKAXaSOKzbaZ0ermNS5UrCE8Z8o0R4/YCyC4S8/prU41W0KS/YS+YjxMROpN4/SsrBTI8tBpzJyzc9L+sMCCvRREzjopI1Np0zl/vY2ijP8gBj7qpEoJngilP6LymdiynJMdunpaOqoX21J9/KASVQdiCwsyM/K7rDBDaMkcafNTqCC049P4iG6z16l9KG/MvKr3sgEiPSzKv+WfH+65+w76qKO+IjOMrW/rC/24JX/ek/Pk68Wy/Eqz5CYr3ZM4+DySO0grHbj2kpUBf9Ahu31rKZpTcDvSKMuaZvav+XKZEIEaVrOyROFKLnMtgQlaH8fEYcsq/IY3xauoprAnioWLoYcy2STGyzNa8rnnC8UCWSv4iAtQdV6fY+aEooVWWMI47jjfXKVYvhVPvX0WdFIvLUPlzjp5GzwuTmS+gcnUz4+5rVVDZUMgAugFTe987NIS70Q+awUuQ3o5fR5bppewlGI9vsyJv0K64q7vnV7NOMux/vTbaVGUU+SafM63rdkmlJT0l69xvRhr5EUbSRPVrFHJ1AL4XlLMszOvcepv7xdIJRK4jU34BXApAQsKt8Qu1PXaaT/Me73koVHUktx1XWxT0R7aOXTwkbogcIwbXoRuX/b5Yl4tatn2ypdug05TU3/1+trr7+KYuWWgbv5AbzkPR4Q== 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:(13230001)(4636009)(46966006)(36840700001)(40470700004)(36756003)(82310400005)(36860700001)(8676002)(4326008)(336012)(426003)(70206006)(83380400001)(81166007)(2906002)(356005)(5660300002)(40460700003)(2616005)(16526019)(8936002)(26005)(47076005)(508600001)(316002)(1076003)(86362001)(6666004)(7696005)(54906003)(70586007)(110136005)(186003)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Apr 2022 09:06:30.9881 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d352b309-ae0b-415e-0122-08da1d2ce693 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: BN8NAM11FT067.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW5PR12MB5598 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Expose struct amd_cpudata to AMD P-State unit test module. This data struct will be used on the following AMD P-State unit test (amd-pstate-ut) module. The amd-pstate-ut module can get some AMD infomations by this data struct. For example: highest perf, nominal perf, boost supported etc. Signed-off-by: Meng Li Acked-by: Huang Rui --- MAINTAINERS | 1 + drivers/cpufreq/amd-pstate.c | 60 +---------------------------- include/linux/amd-pstate.h | 74 ++++++++++++++++++++++++++++++++++++ 3 files changed, 76 insertions(+), 59 deletions(-) create mode 100644 include/linux/amd-pstate.h diff --git a/MAINTAINERS b/MAINTAINERS index 9832b607e2e2..f108e83ba851 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1003,6 +1003,7 @@ S: Supported F: Documentation/admin-guide/pm/amd-pstate.rst F: drivers/cpufreq/amd-pstate* F: tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py +F: include/linux/amd-pstate.h AMD PTDMA DRIVER M: Sanjay R Mehta diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 7be38bc6a673..5f7a00a64f76 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include @@ -65,65 +66,6 @@ MODULE_PARM_DESC(shared_mem, static struct cpufreq_driver amd_pstate_driver; -/** - * struct amd_aperf_mperf - * @aperf: actual performance frequency clock count - * @mperf: maximum performance frequency clock count - * @tsc: time stamp counter - */ -struct amd_aperf_mperf { - u64 aperf; - u64 mperf; - u64 tsc; -}; - -/** - * struct amd_cpudata - private CPU data for AMD P-State - * @cpu: CPU number - * @req: constraint request to apply - * @cppc_req_cached: cached performance request hints - * @highest_perf: the maximum performance an individual processor may reach, - * assuming ideal conditions - * @nominal_perf: the maximum sustained performance level of the processor, - * assuming ideal operating conditions - * @lowest_nonlinear_perf: the lowest performance level at which nonlinear power - * savings are achieved - * @lowest_perf: the absolute lowest performance level of the processor - * @max_freq: the frequency that mapped to highest_perf - * @min_freq: the frequency that mapped to lowest_perf - * @nominal_freq: the frequency that mapped to nominal_perf - * @lowest_nonlinear_freq: the frequency that mapped to lowest_nonlinear_perf - * @cur: Difference of Aperf/Mperf/tsc count between last and current sample - * @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 - * - * The amd_cpudata is key private data for each CPU thread in AMD P-State, and - * represents all the attributes and goals that AMD P-State requests at runtime. - */ -struct amd_cpudata { - int cpu; - - struct freq_qos_request req[2]; - u64 cppc_req_cached; - - u32 highest_perf; - u32 nominal_perf; - u32 lowest_nonlinear_perf; - u32 lowest_perf; - - u32 max_freq; - u32 min_freq; - u32 nominal_freq; - u32 lowest_nonlinear_freq; - - struct amd_aperf_mperf cur; - struct amd_aperf_mperf prev; - - u64 freq; - bool boost_supported; -}; - static inline int pstate_enable(bool enable) { return wrmsrl_safe(MSR_AMD_CPPC_ENABLE, enable); diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h new file mode 100644 index 000000000000..790b04c9000b --- /dev/null +++ b/include/linux/amd-pstate.h @@ -0,0 +1,74 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * linux/include/linux/amd-pstate.h + * + * Copyright (C) 2007-2010 Advanced Micro Devices, Inc. + * Author: Meng Li + */ +#ifndef _LINUX_AMD_PSTATE_H +#define _LINUX_AMD_PSTATE_H + +#include +/********************************************************************* + * AMD P-state INTERFACE * + *********************************************************************/ +/** + * struct amd_aperf_mperf + * @aperf: actual performance frequency clock count + * @mperf: maximum performance frequency clock count + * @tsc: time stamp counter + */ +struct amd_aperf_mperf { + u64 aperf; + u64 mperf; + u64 tsc; +}; + +/** + * struct amd_cpudata - private CPU data for AMD P-State + * @cpu: CPU number + * @req: constraint request to apply + * @cppc_req_cached: cached performance request hints + * @highest_perf: the maximum performance an individual processor may reach, + * assuming ideal conditions + * @nominal_perf: the maximum sustained performance level of the processor, + * assuming ideal operating conditions + * @lowest_nonlinear_perf: the lowest performance level at which nonlinear power + * savings are achieved + * @lowest_perf: the absolute lowest performance level of the processor + * @max_freq: the frequency that mapped to highest_perf + * @min_freq: the frequency that mapped to lowest_perf + * @nominal_freq: the frequency that mapped to nominal_perf + * @lowest_nonlinear_freq: the frequency that mapped to lowest_nonlinear_perf + * @cur: Difference of Aperf/Mperf/tsc count between last and current sample + * @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 + * + * The amd_cpudata is key private data for each CPU thread in AMD P-State, and + * represents all the attributes and goals that AMD P-State requests at runtime. + */ +struct amd_cpudata { + int cpu; + + struct freq_qos_request req[2]; + u64 cppc_req_cached; + + u32 highest_perf; + u32 nominal_perf; + u32 lowest_nonlinear_perf; + u32 lowest_perf; + + u32 max_freq; + u32 min_freq; + u32 nominal_freq; + u32 lowest_nonlinear_freq; + + struct amd_aperf_mperf cur; + struct amd_aperf_mperf prev; + + u64 freq; + bool boost_supported; +}; + +#endif /* _LINUX_AMD_PSTATE_H */ From patchwork Wed Apr 13 09:05:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Meng, Li \(Jassmine\)" X-Patchwork-Id: 561139 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 44B2CC433EF for ; Wed, 13 Apr 2022 09:06:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234208AbiDMJJD (ORCPT ); Wed, 13 Apr 2022 05:09:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234203AbiDMJJB (ORCPT ); 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Wed, 13 Apr 2022 04:06:30 -0500 From: Meng Li To: Shuah Khan , "Rafael J . Wysocki" , Huang Rui , CC: Nathan Fontenot , Deepak Sharma , Alex Deucher , "Mario Limonciello" , Jinzhou Su , Perry Yuan , Xiaojian Du , "Viresh Kumar" , Borislav Petkov , , Meng Li Subject: [PATCH 2/3] selftests: cpufreq: Add wapper script for test AMD P-State Date: Wed, 13 Apr 2022 17:05:09 +0800 Message-ID: <20220413090510.4039589-3-li.meng@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220413090510.4039589-1-li.meng@amd.com> References: <20220413090510.4039589-1-li.meng@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-Office365-Filtering-Correlation-Id: 61a88996-c496-4887-733b-08da1d2ce8fc X-MS-TrafficTypeDiagnostic: CH0PR12MB5345:EE_ X-Microsoft-Antispam-PRVS: 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:(13230001)(4636009)(46966006)(40470700004)(36840700001)(40460700003)(26005)(7696005)(6666004)(36756003)(81166007)(2906002)(86362001)(508600001)(82310400005)(5660300002)(8936002)(1076003)(110136005)(316002)(186003)(16526019)(356005)(54906003)(70206006)(426003)(70586007)(336012)(83380400001)(47076005)(4326008)(36860700001)(2616005)(8676002)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Apr 2022 09:06:35.0346 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 61a88996-c496-4887-733b-08da1d2ce8fc 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: BN8NAM11FT067.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR12MB5345 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Adds a wrapper shell script for the amd_pstate_testmod module. Signed-off-by: Meng Li --- tools/testing/selftests/cpufreq/Makefile | 2 +- tools/testing/selftests/cpufreq/amd_pstate_testmod.sh | 4 ++++ tools/testing/selftests/cpufreq/config | 1 + 3 files changed, 6 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/cpufreq/amd_pstate_testmod.sh diff --git a/tools/testing/selftests/cpufreq/Makefile b/tools/testing/selftests/cpufreq/Makefile index c86ca8342222..c32adc59a1f4 100644 --- a/tools/testing/selftests/cpufreq/Makefile +++ b/tools/testing/selftests/cpufreq/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 all: -TEST_PROGS := main.sh +TEST_PROGS := main.sh amd_pstate_testmod.sh TEST_FILES := cpu.sh cpufreq.sh governor.sh module.sh special-tests.sh include ../lib.mk diff --git a/tools/testing/selftests/cpufreq/amd_pstate_testmod.sh b/tools/testing/selftests/cpufreq/amd_pstate_testmod.sh new file mode 100755 index 000000000000..5398ad568885 --- /dev/null +++ b/tools/testing/selftests/cpufreq/amd_pstate_testmod.sh @@ -0,0 +1,4 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# Tests the AMD P-State unit test infrastructure using amd_pstate_testmod kernel module. +$(dirname $0)/../kselftest/module.sh "amd_pstate_testmod" amd_pstate_testmod diff --git a/tools/testing/selftests/cpufreq/config b/tools/testing/selftests/cpufreq/config index 75e900793e8a..374a8adbb34c 100644 --- a/tools/testing/selftests/cpufreq/config +++ b/tools/testing/selftests/cpufreq/config @@ -13,3 +13,4 @@ CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y CONFIG_LOCKDEP=y CONFIG_DEBUG_ATOMIC_SLEEP=y +CONFIG_AMD_PSTATE_TESTMOD=m From patchwork Wed Apr 13 09:05:10 2022 Content-Type: text/plain; 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Wysocki" , Huang Rui , CC: Nathan Fontenot , Deepak Sharma , Alex Deucher , "Mario Limonciello" , Jinzhou Su , Perry Yuan , Xiaojian Du , "Viresh Kumar" , Borislav Petkov , , Meng Li Subject: [PATCH 3/3] selftests: cpufreq: Add amd_pstate_testmod kernel module for testing Date: Wed, 13 Apr 2022 17:05:10 +0800 Message-ID: <20220413090510.4039589-4-li.meng@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220413090510.4039589-1-li.meng@amd.com> References: <20220413090510.4039589-1-li.meng@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-Office365-Filtering-Correlation-Id: 356f08bc-4e0c-4c0b-7ec9-08da1d2ceba1 X-MS-TrafficTypeDiagnostic: MWHPR12MB1534:EE_ X-Microsoft-Antispam-PRVS: 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:(13230001)(4636009)(40470700004)(46966006)(36840700001)(186003)(6666004)(26005)(8676002)(16526019)(40460700003)(70206006)(316002)(82310400005)(54906003)(36756003)(36860700001)(110136005)(81166007)(86362001)(70586007)(4326008)(356005)(83380400001)(47076005)(7696005)(2906002)(426003)(336012)(8936002)(5660300002)(508600001)(1076003)(2616005)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Apr 2022 09:06:39.4717 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 356f08bc-4e0c-4c0b-7ec9-08da1d2ceba1 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: BN8NAM11FT067.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR12MB1534 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add amd_pstate_testmod module, which is conceptually out-of-tree module and provides ways for selftests/cpufreq amd pstate driver to test various kernel module-related functionality. This module will be expected by some of selftests to be present and loaded. Signed-off-by: Meng Li --- .../cpufreq/amd_pstate_testmod/Makefile | 20 ++ .../amd_pstate_testmod/amd_pstate_testmod.c | 302 ++++++++++++++++++ 2 files changed, 322 insertions(+) create mode 100644 tools/testing/selftests/cpufreq/amd_pstate_testmod/Makefile create mode 100644 tools/testing/selftests/cpufreq/amd_pstate_testmod/amd_pstate_testmod.c diff --git a/tools/testing/selftests/cpufreq/amd_pstate_testmod/Makefile b/tools/testing/selftests/cpufreq/amd_pstate_testmod/Makefile new file mode 100644 index 000000000000..8a5596cb2c18 --- /dev/null +++ b/tools/testing/selftests/cpufreq/amd_pstate_testmod/Makefile @@ -0,0 +1,20 @@ +AMD_PSTATE_TESTMOD_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST))))) +KDIR ?= $(abspath $(AMD_PSATE_TESTMOD_DIR)/../../../../..) + +ifeq ($(V),1) +Q = +else +Q = @ +endif + +MODULES = amd_pstate_testmod.ko + +obj-m += amd_pstate_testmod.o +CFLAGS_amd_pstate_testmod.o = -I$(src) + +all: + +$(Q)make -C $(KDIR) M=$(AMD_PSTATE_TESTMOD_DIR) modules + +clean: + +$(Q)make -C $(KDIR) M=$(AMD_PSTATE_TESTMOD_DIR) clean + diff --git a/tools/testing/selftests/cpufreq/amd_pstate_testmod/amd_pstate_testmod.c b/tools/testing/selftests/cpufreq/amd_pstate_testmod/amd_pstate_testmod.c new file mode 100644 index 000000000000..a892cecf19da --- /dev/null +++ b/tools/testing/selftests/cpufreq/amd_pstate_testmod/amd_pstate_testmod.c @@ -0,0 +1,302 @@ +// SPDX-License-Identifier: GPL-1.0-or-later +/* + * AMD Processor P-state Frequency Driver Unit Test + * + * Copyright (C) 2022 Advanced Micro Devices, Inc. All Rights Reserved. + * + * Author: Meng Li + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include "../../kselftest_module.h" + +#include +#include +#include +#include +#include + +#include + +/* + * Abbreviations: + * aput: used as a shortform for AMD P-State unit test. + * It helps to keep variable names smaller, simpler +*/ + +KSTM_MODULE_GLOBALS(); + +/* + * Kernel module for testing the AMD P-State unit test + */ +enum aput_result { + APUT_RESULT_PASS, //0 + APUT_RESULT_FAIL, // + MAX_APUT_RESULT, +}; + +struct aput_struct { + const char *name; + void (*func)(u32 index); + enum aput_result result; +}; + +static void aput_x86_vendor(u32 index); +static void aput_acpi_cpc(u32 index); +static void aput_modprobed_driver(u32 index); +static void aput_capability_check(u32 index); +static void aput_enable(u32 index); +static void aput_init_perf(u32 index); +static void aput_support_boost(u32 index); + +static struct aput_struct aput_cases[] = { + {"x86_vendor", aput_x86_vendor }, + {"acpi_cpc_valid", aput_acpi_cpc }, + {"modprobed_driver", aput_modprobed_driver }, + {"capability_check", aput_capability_check }, + {"enable", aput_enable }, + {"init_perf", aput_init_perf }, + {"support_boost", aput_support_boost } +}; + +static bool get_shared_mem(void) +{ + bool result = false; + char buf[5] = {0}; + struct file *filp = NULL; + loff_t pos = 0; + ssize_t ret; + + filp = filp_open("/sys/module/amd_pstate/parameters/shared_mem", FMODE_PREAD, 0); + if (IS_ERR(filp)) + { + pr_err("%s Open param file fail! \n", __func__); + } + else + { + ret = kernel_read(filp, &buf, sizeof(buf), &pos); + if (ret < 0) + { + pr_err("%s ret=%ld unable to read from param file! \n", __func__, ret); + } + filp_close(filp, NULL); + } + + if ('Y' == *buf) + { + result = true; + } + + return (result); +} + +static void aput_x86_vendor(u32 index) +{ + if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) + { + aput_cases[index].result = APUT_RESULT_PASS; + } + else + { + aput_cases[index].result = APUT_RESULT_FAIL; + } +} + +static void aput_acpi_cpc(u32 index) +{ + if (acpi_cpc_valid()) + { + aput_cases[index].result = APUT_RESULT_PASS; + } + else + { + aput_cases[index].result = APUT_RESULT_FAIL; + } +} + +static void aput_modprobed_driver(u32 index) +{ + if (cpufreq_get_current_driver()) + { + aput_cases[index].result = APUT_RESULT_PASS; + } + else + { + aput_cases[index].result = APUT_RESULT_FAIL; + } +} + +static void aput_capability_check(u32 index) +{ + if (boot_cpu_has(X86_FEATURE_CPPC)) + { + aput_cases[index].result = APUT_RESULT_PASS; + } + else + { + //shared memory + if (get_shared_mem()) + { + aput_cases[index].result = APUT_RESULT_PASS; + } + else + { + aput_cases[index].result = APUT_RESULT_FAIL; + } + } +} + +static void aput_pstate_enable(u32 index) +{ + int ret = 0; + u64 cppc_enable = 0; + + ret = rdmsrl_safe(MSR_AMD_CPPC_ENABLE, &cppc_enable); + if (ret) + { + aput_cases[index].result = APUT_RESULT_FAIL; + pr_err("%s rdmsrl_safe MSR_AMD_CPPC_ENABLE ret=%d is error! \n", __func__, ret); + return; + } + if (cppc_enable) + { + aput_cases[index].result = APUT_RESULT_PASS; + } + else + { + aput_cases[index].result = APUT_RESULT_FAIL; + } +} + +static void aput_enable(u32 index) +{ + if (get_shared_mem()) + { + //not check + aput_cases[index].result = APUT_RESULT_PASS; + } + else + { + aput_pstate_enable(index); + } +} + +static void aput_init_perf(u32 index) +{ + int cpu = 0, ret = 0; + u32 highest_perf = 0, nominal_perf = 0, lowest_nonlinear_perf = 0, lowest_perf = 0; + u64 cap1 = 0; + struct cppc_perf_caps cppc_perf; + struct cpufreq_policy *policy = NULL; + struct amd_cpudata *cpudata = NULL; + + //get perf + highest_perf = amd_get_highest_perf(); + + for_each_possible_cpu(cpu) + { + //get amd cpudata + policy = cpufreq_cpu_get(cpu); + if (!policy) + break; + cpudata = policy->driver_data; + + if (get_shared_mem()) + { + ret = cppc_get_perf_caps(cpu, &cppc_perf); + if (ret) + { + aput_cases[index].result = APUT_RESULT_FAIL; + pr_err("%s cppc_get_perf_caps ret=%d is error! \n", __func__, ret); + return; + } + + nominal_perf = cppc_perf.nominal_perf; + lowest_nonlinear_perf = cppc_perf.lowest_nonlinear_perf; + lowest_perf = cppc_perf.lowest_perf; + } + else + { + ret = rdmsrl_safe_on_cpu(cpu, MSR_AMD_CPPC_CAP1, &cap1); + if (ret) + { + aput_cases[index].result = APUT_RESULT_FAIL; + pr_err("%s rdmsrl_safe_on_cpu MSR_AMD_CPPC_CAP1 ret=%d is error! \n", __func__, ret); + return; + } + + //get perf from MSR + nominal_perf = AMD_CPPC_NOMINAL_PERF(cap1); + lowest_nonlinear_perf = AMD_CPPC_LOWNONLIN_PERF(cap1); + lowest_perf = AMD_CPPC_LOWEST_PERF(cap1); + } + + //check highest_perf,nominal_perf,lowest_nonlinear_perf + if ((highest_perf != READ_ONCE(cpudata->highest_perf)) || + (nominal_perf != READ_ONCE(cpudata->nominal_perf)) || + (lowest_nonlinear_perf != READ_ONCE(cpudata->lowest_nonlinear_perf)) || + (lowest_perf != READ_ONCE(cpudata->lowest_perf))) + { + aput_cases[index].result = APUT_RESULT_FAIL; + pr_err("%s cpu%d highest_perf=%d %d nominal_perf=%d %d lowest_nonlinear_perf=%d %d lowest_perf=%d %d are not equal! \n", + __func__, cpu, highest_perf, cpudata->highest_perf, + nominal_perf, cpudata->nominal_perf, + lowest_nonlinear_perf, cpudata->lowest_nonlinear_perf, + lowest_perf, cpudata->lowest_perf); + return; + } + } + + aput_cases[index].result = APUT_RESULT_PASS; +} + +static void aput_support_boost(u32 index) +{ + int cpu = 0; + struct cpufreq_policy *policy = NULL; + struct amd_cpudata *cpudata = NULL; + + for_each_possible_cpu(cpu) + { + //get amd cpudata + policy = cpufreq_cpu_get(cpu); + if (!policy) + break; + cpudata = policy->driver_data; + + if (READ_ONCE(cpudata->boost_supported)) + { + aput_cases[index].result = APUT_RESULT_PASS; + } + else + { + aput_cases[index].result = APUT_RESULT_FAIL; + break; + } + } +} + +static void aput_do_test_case(void) +{ + u32 i=0, arr_size = ARRAY_SIZE(aput_cases); + + for (i = 0; i < arr_size; i++) + { + pr_info("****** Begin %-5d\t %-20s\t ******\n", i+1, aput_cases[i].name); + aput_cases[i].func(i); + KSTM_CHECK_ZERO(aput_cases[i].result); + pr_info("****** End %-5d\t %-20s\t ******\n", i+1, aput_cases[i].name); + } +} + +static void __init selftest(void) +{ + aput_do_test_case(); +} + +KSTM_MODULE_LOADERS(amd_pstate_testmod); +MODULE_AUTHOR("Meng Li "); +MODULE_DESCRIPTION("Unit test for AMD P-state driver"); +MODULE_LICENSE("GPL");