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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 SN1PEPF00026368.mail.protection.outlook.com (10.167.241.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8137.17 via Frontend Transport; Sat, 9 Nov 2024 04:42:57 +0000 Received: from AUS-P9-MLIMONCI.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 15.1.2507.39; Fri, 8 Nov 2024 22:42:55 -0600 From: Mario Limonciello To: Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= CC: "Rafael J . Wysocki" , Len Brown , Maximilian Luz , Lee Chun-Yi , "Shyam Sundar S K" , Corentin Chary , "Luke D . Jones" , Ike Panhc , Henrique de Moraes Holschuh , "Alexis Belmonte" , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Ai Chao , Gergo Koteles , open list , "open list:ACPI" , "open list:MICROSOFT SURFACE PLATFORM PROFILE DRIVER" , "open list:THINKPAD ACPI EXTRAS DRIVER" , Mark Pearson , Matthew Schwartz , Mario Limonciello , Armin Wolf Subject: [PATCH v6 20/22] ACPI: platform_profile: Allow multiple handlers Date: Fri, 8 Nov 2024 22:41:49 -0600 Message-ID: <20241109044151.29804-21-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241109044151.29804-1-mario.limonciello@amd.com> References: <20241109044151.29804-1-mario.limonciello@amd.com> Precedence: bulk X-Mailing-List: linux-acpi@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: SN1PEPF00026368:EE_|LV2PR12MB5967:EE_ X-MS-Office365-Filtering-Correlation-Id: a1306266-45d3-4da0-e29b-08dd0078fbf9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|376014|7416014|1800799024|36860700013|82310400026; X-Microsoft-Antispam-Message-Info: NRV8hp0wfkF7gRQj6IzOAVQtE/IYPjTHr/EAkLAV8AlG6pMhWKkSOqqFQlmPha74elQk/0H2kD2DMwPSu5xj9i02bf5jW9asFlWC0MLjUqJnTdhtLYq98SMX9VO46HDiJ8P9wZBYOwx+wjNCIK+mfTwddbIBJEtUZeqJh48aBNbEvH2gCOG8lpWiqPX6X3O+KC4l3RrIXZS8rZk32GccUpyQwZv41HQ5Sx7RQXcsqlLnRb1hV0OQYzyUsFsy/ZRUDK/bZxWHa8NT5OKqGolGvlVcRo8Ls5cYQUlsHhgu/dO/b316/WRtu2nyhqv21hfF/ijI7Mg0JXKeUt5IYAvHdOSN1oOoUBnOKk2/QOYTX0D71BIbJ+F+5UiELpbAunsuTAUxau0PD1F4CVMQcDJXCpgUpz0/8INqXjVQFRNikp8ddfjDvL9g3Zga76728+vnJNy9geOUmX9yX1R7gJoa2J9OyOWTLrQcl5Pge5N+7eG+F3DWvwjvEDz9U44PLGFK/raxfDhxzab9X5TYSxgjHRbGz0n8fKXtB8hKCBsWe8vqfyxkh9dLdb4psvq7DKA2koEYccxXndMzmZHL2txLuqVzz/aRKgqFwCvuqbnL+a3008fgaPha0vHt9BjDLUqPj2r2T8lyxc3X6YYodOia8rzshkKHSq2YoxBVKIfAYeEJwHSQT8mwbeX/QeelBl1wT+PRLBiopQ23acQ+HANvLyWKTxnrMt79BrrcTrk6h42mv+miR1rS+gU2Ueh1mqg2PsOHZiZ9SaHMB0xXfTbV+7sYtNcevCq/L8hvYJCenu6AEKsfqzpr5Borzr0shNanaLtDBqVFoGjDD1LJ9O736AOxFQUaqDXIk/6iaEQpYtcK8YVsTmuADU8ZLw4BH0cTxEZiZ0MHNpCtnzOPBsMhHJDh8U2PQd1K58coJAYAVcCxJFSfUM8V3nCnEBflfcReTiF7rjYayPy4Mxvr6Z+2XTmBlODjfHjEVodqeSn8DGa80UUrJmogobZwNypfUuulDKoBCjRrVTxXz4sLlj3OT+e5gWczDEf89LUtDYPPSge0xbKFCXDKtyAdwGp1xRFCv4Utl8hQBF1JuicHEG5yo7YfBhKNPtYG/xgn4dCx7ruJ7iJLCJHnhcnSSGGWnwJnl1I5PqW+hW5Ezlz2PlRMlxM6v92ZitiFV6qIQORA3APF3SP+Qdz7UIgPS+JFfJF0mOCp8Umt0Cb4tMOtOaH1y9/yC0O90A96Pi4I5lMqX7Nb+89VBdzST9zcn+0pIyFdOd7YNoa6QWdVueqd+HES7uLbILmgVntMKdgcR0/fIcAmMDZTt/rgSRlWoLFv8p+nKXJRymZNUE55SpQzZ3F7vGLlZkN5anwDAadNUFrSRbwALJ0BD5o32pZs1LmdqR7I3+AKppDTzH6jzBjl+Hc4jg== 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:(13230040)(376014)(7416014)(1800799024)(36860700013)(82310400026); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Nov 2024 04:42:57.9230 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a1306266-45d3-4da0-e29b-08dd0078fbf9 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: SN1PEPF00026368.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV2PR12MB5967 Multiple drivers may attempt to register platform profile handlers, but only one may be registered and the behavior is non-deterministic for which one wins. It's mostly controlled by probing order. This can be problematic if one driver changes CPU settings and another driver notifies the EC for changing fan curves. Modify the ACPI platform profile handler to let multiple drivers register platform profile handlers and abstract this detail from userspace. To avoid undefined behaviors only offer profiles that are commonly advertised across multiple handlers. If any problems occur when changing profiles for any driver, then the drivers that were already changed remain changed and the legacy sysfs handler will report 'custom'. Tested-by: Mark Pearson Tested-by: Matthew Schwartz Reviewed-by: Mark Pearson Reviewed-by: Armin Wolf Signed-off-by: Mario Limonciello --- v6: * rebase v5: * reword commit message --- drivers/acpi/platform_profile.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c index 7ad473982ab11..0a8b86b44e161 100644 --- a/drivers/acpi/platform_profile.c +++ b/drivers/acpi/platform_profile.c @@ -10,7 +10,6 @@ #include #include -static struct platform_profile_handler *cur_profile; static DEFINE_MUTEX(profile_lock); static const char * const profile_names[] = { @@ -415,8 +414,7 @@ static const struct attribute_group platform_profile_group = { void platform_profile_notify(struct platform_profile_handler *pprof) { - if (!cur_profile) - return; + guard(mutex)(&profile_lock); _notify_class_profile(NULL, pprof); sysfs_notify(acpi_kobj, NULL, "platform_profile"); } @@ -480,9 +478,6 @@ int platform_profile_register(struct platform_profile_handler *pprof) } guard(mutex)(&profile_lock); - /* We can only have one active profile */ - if (cur_profile) - return -EEXIST; /* create class interface for individual handler */ pprof->minor = ida_alloc(&platform_profile_ida, GFP_KERNEL); @@ -498,8 +493,6 @@ int platform_profile_register(struct platform_profile_handler *pprof) sysfs_notify(acpi_kobj, NULL, "platform_profile"); - cur_profile = pprof; - err = sysfs_update_group(acpi_kobj, &platform_profile_group); if (err) goto cleanup_cur; @@ -507,7 +500,6 @@ int platform_profile_register(struct platform_profile_handler *pprof) return 0; cleanup_cur: - cur_profile = NULL; device_unregister(pprof->class_dev); cleanup_ida: @@ -528,8 +520,6 @@ int platform_profile_remove(struct platform_profile_handler *pprof) sysfs_notify(acpi_kobj, NULL, "platform_profile"); - cur_profile = NULL; - sysfs_update_group(acpi_kobj, &platform_profile_group); return 0;