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Wysocki" , Viresh Kumar CC: "open list:AMD PSTATE DRIVER" , Perry Yuan , open list , "Mario Limonciello" Subject: [PATCH v3 0/6] Improve usability for amd-pstate Date: Thu, 14 Apr 2022 11:47:55 -0500 Message-ID: <20220414164801.1051-1-mario.limonciello@amd.com> X-Mailer: git-send-email 2.25.1 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: b18cdf78-41e4-4293-e6e7-08da1e36909a X-MS-TrafficTypeDiagnostic: MW2PR12MB2571: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)(7696005)(54906003)(316002)(47076005)(6666004)(336012)(36860700001)(86362001)(36756003)(40460700003)(81166007)(356005)(110136005)(82310400005)(83380400001)(426003)(508600001)(1076003)(2906002)(44832011)(70206006)(16526019)(70586007)(5660300002)(8676002)(186003)(8936002)(4326008)(26005)(2616005)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Apr 2022 16:48:12.8859 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b18cdf78-41e4-4293-e6e7-08da1e36909a 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: BN8NAM11FT017.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR12MB2571 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org There has recently been some news coverage about `amd-pstate` being in 5.17, but this news also mentioned that it's a bit difficult to use. You need to either block init calls, or compile the module into the kernel to force it to take precedence over acpi-cpufreq. This series aims to improve the usability of amd-pstate so that distros can compile as a module, but users can still use it (relatively) easily. A new module parameter is included that will force amd-pstate to take precedence and a module table to let it load automatically on such systems. By default with this series it will replace acpi-cpufreq no matter the module load order. If users want to prefer acpi-cpufreq when amd-pstate is a module they can make a modprobe configuration file. /etc/modprobe.d/amd-pstate.conf: options amd-pstate replace=0 Mario Limonciello (6): cpufreq: Export acpu_cpufreq_exit for other drivers to call cpufreq: amd-pstate: Only show shared memory solution message once cpufreq: amd-pstate: Move cpufreq driver check later cpufreq: amd-pstate: Allow replacing acpi-cpufreq when loaded cpufreq: amd-pstate: Add a module device table cpufreq: amd-pstate: Default to replace acpi-cpufreq drivers/cpufreq/acpi-cpufreq.c | 10 +++++++-- drivers/cpufreq/amd-pstate.c | 39 +++++++++++++++++++++++++++++----- include/linux/cpufreq.h | 3 +++ 3 files changed, 45 insertions(+), 7 deletions(-) Reviewed-by: Huang Rui Acked-by: Huang Rui