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De Francesco" , Terry Bowman , Joshua Hahn , Robert Richter Subject: [PATCH v7 09/11] cxl/acpi: Prepare use of EFI runtime services Date: Fri, 14 Nov 2025 22:39:22 +0100 Message-ID: <20251114213931.30754-10-rrichter@amd.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251114213931.30754-1-rrichter@amd.com> References: <20251114213931.30754-1-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: CH1PEPF0000AD83:EE_|IA0PR12MB7627:EE_ X-MS-Office365-Filtering-Correlation-Id: 61a298e1-48e7-46af-3f0b-08de23c667a4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|376014|7416014|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?GeSVmIwaBenB1fnw4APE/3P+ccQ2krnjZHAc9oHJimumsLWcxmqOGf2DOF9T?= =?us-ascii?Q?AbNvnsCboztx7aapZ4T22buKai67BjefXGyNSrOUUOyWvqZiCo3n6l9nnLHQ?= =?us-ascii?Q?oDQbSrW0cV0tVCqiGdmu+ynFRDjyX70AsE1khxiM9BD1zbmBTbmGPqcpDbzx?= =?us-ascii?Q?g/AEo/HK5pZjLeeUcquOPFuY+NWix3jdPX0F1aYJBYiZxkq8YnNUQjypu07U?= =?us-ascii?Q?9/jA6os472CzE7lEElb3Y84avq3pLuMMf20Xh/P01NJfa+4QOCA5wxy+fsVs?= =?us-ascii?Q?x1SfBkNqUR1TieQdigyVPuinMz1q9n+ymSdviUuLLqhbOsTWVqCQPiunq+OV?= =?us-ascii?Q?I3zdmK9JYcVF8xnHMl9gK5ZGYwJh8NVHlQOWOQAqUK0Bag9prQaI9vbCUSYn?= =?us-ascii?Q?HhYDR7eNgNpUK39LceuXLpDqIvQemvWB2koQF8PbKG8Qb7z5BLNLS4YkSXV1?= =?us-ascii?Q?dEkrEE8Rmg6xxLB8NbHSA8ngbdfdn0EYjeVl7xkn3RQzvUKVimAVnq0Gsqxq?= =?us-ascii?Q?APx6pkMm8KzIpKLc41JM0D0AKAxexu0IzLK9CqxMS95pbnxCHawpmZDnGNcY?= =?us-ascii?Q?QVx2SS08TkZ6u+wAEDgSO1EDrHkSpD6e/8YmxSDAdlec3RMiZbAn5gaGQFmX?= =?us-ascii?Q?oAEqyeZd8zRxgUzhF5zDW8zrToUbUaRqg7BTcp2YGK+LY/LUEE9lwkzO88UX?= =?us-ascii?Q?ajIHlzfehmWCwmphyUjFdqu0kLQNxSItQGbw/tof5tqjcueDAfX33DrI8e8z?= =?us-ascii?Q?H/eOjJibNugN8rv6cpvrJbGUuG6Lw0Wmp+mbhDZ2hA6nQiZoXTEziqCTF8jC?= =?us-ascii?Q?2hwXmZr96Q7DU/EpL+4hOorKv+CVLdZ9LljzkP1yzYHsEP3QTPlRbA4G12xO?= =?us-ascii?Q?9YCecWWeJGRi2smosciKKN9mjfrl5XFJpDnbCHd4Duwjz9NK9QNIOng3K5aJ?= =?us-ascii?Q?wT6GNLzCf6MsN8ruIWho2LggbZgxeAiXyaAEchy3vE0Ia/28ry+1qB5qgOkR?= =?us-ascii?Q?V7MfcXCh7iWWnyr1nEk0klhdoY3lpP/Ndg5hg/zbEtcpDpK3k49QJgsNm2ia?= =?us-ascii?Q?K6WmVIJ1nqEYhJnPCaSXxEaD2ln29mK4ykvf3q/wM5FB+kU7Ow1cWFfdtd/N?= =?us-ascii?Q?0FiylrF28XGC+yCSSqbhhWqnZAC+A8SaPO28h2Jwo3iOl4CQfXxk+2eR02nq?= =?us-ascii?Q?f+tFibi9kXLrsI24vSZOD72erIxMXdbyJK8OsS5dHOlTOsTQgTYaR61i3w3U?= =?us-ascii?Q?jwELtZRYe9//EwTpQjirvKM4KxUAMVFfUpTnwkCSqB8moFmgfcBPwYXbm0VI?= =?us-ascii?Q?H/HKyK4i/TIBNMUjp4dN5+7IvMXc4KXfbINsjMn7zE2vLoJxFeKCKLLdxcya?= =?us-ascii?Q?yGyFR69FIOGVBjqGuMv4PaZ2NiB6Il7XZVf91H780EQ8SaBQLysQKXlsaNYD?= =?us-ascii?Q?0umtXbxNUGN7gOqSLoaIEyGVcVnbsyHBhIKYhSdF40uD69OoJzIt5pc+hSys?= =?us-ascii?Q?OreNGGZZbdrV2FeEeJDyxCEtzEK3n2882jp6c5JboIY6nZbc5+x9zXZyHd2D?= =?us-ascii?Q?YMwVWFzJNFkcWL9Z/Fs=3D?= 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)(36860700013)(82310400026)(376014)(7416014)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Nov 2025 21:40:18.1959 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 61a298e1-48e7-46af-3f0b-08de23c667a4 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: CH1PEPF0000AD83.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB7627 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 Reviewed-by: Gregory Price Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Tested-by: Gregory Price Signed-off-by: Robert Richter --- 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 866813e1b729..604cf995d0e4 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -989,8 +989,12 @@ 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 2.47.3