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De Francesco" , Terry Bowman , Joshua Hahn , Robert Richter Subject: [PATCH v5 09/11] cxl/acpi: Prepare use of EFI runtime services Date: Wed, 12 Nov 2025 21:31:36 +0100 Message-ID: <20251112203143.1269944-10-rrichter@amd.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251112203143.1269944-1-rrichter@amd.com> References: <20251112203143.1269944-1-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: DS2PEPF00003441:EE_|SA3PR12MB9159:EE_ X-MS-Office365-Filtering-Correlation-Id: 6e3da646-4278-4ef0-2ebf-08de222a9819 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|1800799024|82310400026|376014|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?x7hpUOiATvD9mIJ8u9WJf9Jup3dFj6YC3hG2WNw0nMJSmKNlI8cPy4ldPD2M?= =?us-ascii?Q?jKy9Jxm7ENYvQZ6+SpmBhuhDn5Rk13VGIFJFgKrWhrI6k8ioC+ViYIag4iXu?= =?us-ascii?Q?SuO1/KutaHnVzNZCpUPV6rtzfvhY02CpXbNNRiKb2/9aLITqWKdfxpfCQzS1?= =?us-ascii?Q?78p8y0UPl300hxDvkfz61QeUyYA3Wem1ZEBX8piRtBAS4aZx4c+1/QNMiZHt?= =?us-ascii?Q?jjGHvKBLa2HrssOTZ/G0tDsTJzb7mO5HJgsYSgSzSCD1uEbTl6HBRHRbNT6P?= =?us-ascii?Q?Ssi27IfonAvlFqw+eR1OEYEO6wdIS02l8xMQaDd8IruryPwx8e7Kr0CJJOxf?= =?us-ascii?Q?kCK3mU9hnJec7PW378p+625xPMHeUJk28CzF751f80d/PUC4kpBDdas4B1sS?= =?us-ascii?Q?R4O5eIZikEE3dKkyQiuqk021kI/Jz8rekJliVotBZMuvOmKF7ZYmP5JuD0IJ?= =?us-ascii?Q?ynApljqA/y+53QHgtw/BEInGxT3SuBanuy1hkzckntMoAHb3iKQddMO74M27?= =?us-ascii?Q?pIOzLolinsrc8ef8M4ESwA4UVu+Sbu6b43VbIWKo/XPi23reQinIpr1lc0Dv?= =?us-ascii?Q?FnEIWG4sUu26wOVknwvBVfnLsL2e6qPl6vHZpS2pd9WnW11wUdIWSVTexuRe?= =?us-ascii?Q?RNjms6GtwuV9kNUzwmql1eMBddJh8ZKf0NMYlB5O9wsIQIgz4skKhDFfE+uU?= =?us-ascii?Q?YPKoEfCb0+OKV4Aj+FhAgxLnQEBRZvOggE43y2a7yQxebetOqEq3mfuRyu0o?= =?us-ascii?Q?UnEnozkDPgPST84wgO5gNLZ4NGoC/vgdXIXndW1ssTGxs0DTqw3iNfdG3Kub?= =?us-ascii?Q?ORIrrbcGgkgDR8UEWIRd+jryocaofUrmxSM7EO+pYn2l+ZThXAnU5V/2jcTh?= =?us-ascii?Q?Z4rE1oUZKJwRMYvPzNMCzJ6IlnJk/tJTK5x1yF+7UB8+xQbo/iNq/tg0KOOB?= =?us-ascii?Q?CXOXeF8TMnBfkL6YJMQU0bYFeVD/oL2jk+An9/1cnBp+s96uoHjANzgMkWeA?= =?us-ascii?Q?e3fgFUFvx4PWtz79sgoi70iu43vctsu6KyOHsEXZm2b7mmgOQS2WOBGzNwrQ?= =?us-ascii?Q?II7Oj6iPNlXZQCS6KL/eCMl2Ng5/QTNa1xDzd6fzuRLLhxDZJMfdr6V4iU5D?= =?us-ascii?Q?3eldBUIhN3UNyZxaKmrGsMLqdDq/ZMivSlxIjuJP/v0zsmJer1BlE+o06Aw1?= =?us-ascii?Q?TN9j+VVly2fZ2589tKnVePKp0hT8tvG7qo3QDa9fi9k6nUD4GTmuvxwpmFCn?= =?us-ascii?Q?pU6n4ht2gCXXGm/cgZkLVepIL9bhQC3OMkMrQhDjw5aW/f5JhRYDUJqG61g2?= =?us-ascii?Q?Vg68cF3yelw8evmBM3/axEBJCq5ikc8zH120wRm9T6qMTfOGimYfk3WpDUCH?= =?us-ascii?Q?twrIrE3nfh1AL2BhLvJbFKZdZxUIgJSwgbiiyUEjuyPiqJr06aKgax4Ts1J5?= =?us-ascii?Q?fbNePuhZYik6K4xXs55G3WnA5WAv/vGwcYy3mH2VRie8XRxhkYwObR6DsKo9?= =?us-ascii?Q?E6lE57ZX3zr5rqiwRxupxxgHrzhUfLl3xLOTK98w1dFuaXNGrr+UaZLcvEog?= =?us-ascii?Q?jyuKFXkG6IBQAxovh1c=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)(7416014)(1800799024)(82310400026)(376014)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Nov 2025 20:32:26.8146 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6e3da646-4278-4ef0-2ebf-08de222a9819 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: DS2PEPF00003441.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB9159 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 4fe489244a77..52b3c162a564 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 2.47.3