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De Francesco" , Terry Bowman , Joshua Hahn , Robert Richter Subject: [PATCH v3 10/11] cxl/acpi: Prepare use of EFI runtime services Date: Fri, 12 Sep 2025 16:45:12 +0200 Message-ID: <20250912144514.526441-11-rrichter@amd.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250912144514.526441-1-rrichter@amd.com> References: <20250912144514.526441-1-rrichter@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: satlexmb07.amd.com (10.181.42.216) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002636D:EE_|DM4PR12MB6397:EE_ X-MS-Office365-Filtering-Correlation-Id: 4deb88da-af72-4479-f085-08ddf20b2133 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|7416014|376014|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?WE1hWZS5rx1b2G/sFjM+8TwJXKxdPChqoi4tN3XB0Z/MMSb7mx45s9r5Kc1O?= =?us-ascii?Q?yHd50E7dhWj/tHPs6v663gVFmX8Qw0s1754HQB3R+7Be7al9m784n+ZHtxPt?= =?us-ascii?Q?bfk5sdq8yZTJ99gpO6aVG0UTQY57GqFFE7+KpUOVc8fDaX2PgJKpTRx26Pdy?= =?us-ascii?Q?snIKGJFsAKNluEUrJ7sq61v4PyIh1AKtUScuv3M0u5w+QL7bV+z5RjB1kgvL?= =?us-ascii?Q?Gs7NloeSkxqwzgr431AmzCiDiF7DRyC/v3Jm+AI1cpxs5g1MQsE7kZIyMADP?= =?us-ascii?Q?acz7Suh2iOABZ8rpMplDyOyjKMwtz/iLU+vjApeJB/rSDJqC4VM0qTbYvRC6?= =?us-ascii?Q?rcr5xfcA2QPRvWeXLtuHBfqtewJdJTnN5RULVltHNw2pNICym6BqQr8OTK/0?= =?us-ascii?Q?VUk6AjqlE+SSMar2NyBN45G1caykFb2vQUnzJh4dxfsUpeEb+uoi56dbHjgU?= =?us-ascii?Q?j4ctiA3AW7VYXSThL3JEHhvLggqdcWfbrz9EI75WUuT35LBQuCRiBDoYDSE/?= =?us-ascii?Q?ChWLqQkt0ULwhNmfYOC/XjIDRx96DHUhKJu6Koe+55ljsFEd0a5V3vpwwPYs?= =?us-ascii?Q?PPTwz6MWuB/vg91tmgYFepOujYym6qaUzOUbE29XzkHK1SqksTcGcV36EBBI?= =?us-ascii?Q?jGvkA3W9s1mlE3Wnw+/qQLkwf6wlQj18c+4wrQQRa0JNRdJu5fqABCv5KiXB?= =?us-ascii?Q?x5FOHr4DWhJd3YWAYXbOAyM9bD9pKt/rYEQ6FO78uHnjlF1Mz6xkiE5Lu3Oc?= =?us-ascii?Q?PH1h4qmdqTSk8j13UB8vKJd9C3pOioOkFo1fMA6alqsDkQkYxUSp6wlGo6OZ?= =?us-ascii?Q?iARqu1bRf6aJEEWmME/vj64KvLbR3IFrJUB1aVPlxIToMjH9J5hvaJvWDEG4?= =?us-ascii?Q?J7ULhz1lar7Sp5akrloDGrr6EQ7f8BACH3CeX8HY7yGJxay6cBtabp6Jkbge?= =?us-ascii?Q?2/YFGMIoofOVs64id3iXPwLC0gcR5tpOnSdObH+OMPyIgm1ma1nyEjWocUqU?= =?us-ascii?Q?6ENj2Mx3YiaIxXwnSsv/vXFt9NLtX5Y/mgbtkZ3KBa7N8fnMdTwUtZD7+uBq?= =?us-ascii?Q?xugOJpPyKWGW9sd9VSNJcma3EOiSE2McXyRlDitF8ZcY/yORqz2iZSweOBNj?= =?us-ascii?Q?k9xUzn3c3qxlhSBPkaGFkHAtc50keBKYTP3YdBsv/+g2Hyd8HPyqD6B4N7qr?= =?us-ascii?Q?6CmDbx1p8aThjW5wsTAlVqw+JZAtBr0KzzW7FFABpX7oubVw/CBQCOn3yTZz?= =?us-ascii?Q?7KBYkqt2oqG5CKRJI129209fE2RaBDBxWnSvhzF+X8xZNpjTrT8rGthph4Tf?= =?us-ascii?Q?3p0dkT73lV0ReyvUmnMDx87EC4EQh/rnmDdakAcuj1MVXyyluQhm/KN05pso?= =?us-ascii?Q?F+xTImSZpIyxcuaScZXxUtxkd75zktUnD1QA++UycfWdctywCmsP7bnSnQNS?= =?us-ascii?Q?wDwrkt/VnbbzCU0baKz/4ppR7tLXFlnpc+BGCpDpNKQdGSFRcOKA1KlLZuOF?= =?us-ascii?Q?2RpR80Ce4jMO7Acry5owKx6pMls0AmneqEom?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(82310400026)(7416014)(376014)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Sep 2025 14:46:17.1357 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4deb88da-af72-4479-f085-08ddf20b2133 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=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF0002636D.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6397 Content-Type: text/plain; charset="utf-8" In order to use EFI runtime services, esp. ACPI PRM which uses the efi_rts_wq workqueue, initialize EFI before CXL ACPI. There is a subsys_initcall order dependency if driver is builtin: subsys_initcall(cxl_acpi_init); subsys_initcall(efisubsys_init); Prevent the efi_rts_wq workqueue being used by cxl_acpi_init() before its allocation. Use subsys_initcall_sync(cxl_acpi_init) to always run efisubsys_init() first. Reported-by: Gregory Price Tested-by: Joshua Hahn Reviewed-by: Joshua Hahn Signed-off-by: Robert Richter Reviewed-by: Gregory Price --- drivers/cxl/acpi.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c index 26c494704437..95a5ba395c1a 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -1012,8 +1012,12 @@ static void __exit cxl_acpi_exit(void) cxl_bus_drain(); } =20 -/* load before dax_hmem sees 'Soft Reserved' CXL ranges */ -subsys_initcall(cxl_acpi_init); +/* + * Load before dax_hmem sees 'Soft Reserved' CXL ranges. Use + * subsys_initcall_sync() since there is an order dependency with + * subsys_initcall(efisubsys_init), which must run first. + */ +subsys_initcall_sync(cxl_acpi_init); =20 /* * Arrange for host-bridge ports to be active synchronous with --=20 2.39.5