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De Francesco" , Terry Bowman , Joshua Hahn , Robert Richter Subject: [PATCH v8 09/13] cxl/acpi: Prepare use of EFI runtime services Date: Tue, 9 Dec 2025 19:06:45 +0100 Message-ID: <20251209180659.208842-10-rrichter@amd.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251209180659.208842-1-rrichter@amd.com> References: <20251209180659.208842-1-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: satlexmb08.amd.com (10.181.42.217) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000989E5:EE_|DM4PR12MB7552:EE_ X-MS-Office365-Filtering-Correlation-Id: 51920dbc-c28a-45e4-3348-08de374df5c7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|1800799024|82310400026|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?7EXQOCoVO4/qpkofhZlYcTxuA+aLqX//pmDU1cRmxpD0uQh6RAX4hwUHloXA?= =?us-ascii?Q?aDalAF29S2ez98iobAUocGBnI6QB9bhvYhnolm0wxGrPdpD+Jw1qYzYtU0WR?= =?us-ascii?Q?I5LxFLgF9xjnJXXAWkGGKfp22CDaQE8uKMRv56WVqbEWuVoeDEQGDEUcJTJn?= =?us-ascii?Q?7iGbuPj46vvj098Rcz6WlBGUWR9lEb2XjKXHoqVPjwmfqd0E3tYVpH8UMFMr?= =?us-ascii?Q?S73gdIMDUVgZDKlFDmNbrL2mKWRPvuVoXQgyPlq9reNiCp+U/khF3GGrZ7ME?= =?us-ascii?Q?NQIlcepteKCsO5nDaczUAAFjsNyX3dFLj9dyXLwk8gpyTZoIPD6fvZZ6I0G9?= =?us-ascii?Q?UVJqZ9hJ2Hu1N5zjmOBAXiR+YIIoSQBnKWBH4JUr66Ibv4RoiA4NxzN7kTQ3?= =?us-ascii?Q?p+F3HfJ40FXuDFlEFpLfzeAT8U1uCuGDk+J4n2DRU6ktyIaN2hA/Fkix6KPl?= =?us-ascii?Q?qu8no7nEHTxrFvSpn0imknMuuLmDS/VDJaAn0f3HWM7bGVvY2gCNrKQrebLn?= =?us-ascii?Q?xk4xMfDAobUGyzkB0BjbMFD+g6VR/EzekzjrwKaf1YBhBYZWNhftEzvv97ik?= =?us-ascii?Q?8JEeIrnNZgMZ90ak00vjRQkLta13sOFJkAVm5YQC0ae6wpwS6vIl1b0V3+Gd?= =?us-ascii?Q?H010EdsDxLIMkbvWCW78jcZq4o30h7qTEydUnf3l+G6WCzqWupUbZADbUBib?= =?us-ascii?Q?O9Odq5Zi8xgH3iLG4dF8ES5zeGQncqn4ETY9I/VmTqLJEH1lHHxHPvg2jp/v?= =?us-ascii?Q?fEPVFAAyDEeZfndCluTqJx8apvIoprhCbfJ3Lr1SQJf/HItfFv+5xooX7mYr?= =?us-ascii?Q?qrgDC3iJgrxUmezVlfd+eJJ6H+pFjzes7T6NKYOWY7Si0XOjtYhLc6ArN+oh?= =?us-ascii?Q?CRf7mn0JgUevl1tWDZzwGMhAUeM7i5rZsV5Jh2TFKdjt4opbA2/6bv4X2g7B?= =?us-ascii?Q?6Kn7Jux/3e3tcD/QBQ24AjCNdjmu5unq4g5M5/CJPLeGU1mPDM99boNs1ka6?= =?us-ascii?Q?IQpsJo3bxSZz991qG7Ra+gmZwno2h3tuR8oQ6HKwRAAKu4kpFDFgQGgvJG8c?= =?us-ascii?Q?/stS5zRUN5ClrXXKhE4tV9JmgZXq5u/Pg+Zx4rIOcXS11NDfi6G6jhbF5SV7?= =?us-ascii?Q?ZjxlZISevdTKxUbcT5g0S7okqdGfDaCYoLK1eEASNXGap78x3HriqC/g+521?= =?us-ascii?Q?Cs+XuS2DD0jlGZnfm7ZSlHmBYBrmbDLIm2ZI+PFgR1qGkLIiOoc2wsSflMnh?= =?us-ascii?Q?0UMEj6btx/6j33km2tgLzndu5A1omhX+KMYuKXqvQ/LimTRDsiPAKUDYk9GG?= =?us-ascii?Q?OjziBpkwO6BLl4ytxTGavC9TlPomniG8Mj40U2aSZqKbp//USaXVfdANsubM?= =?us-ascii?Q?nE3o5LkzBNhN7IjujzSxOfPUrQC7a8Mmo65P0MY+ctXsTAdRqfvd10zbtK43?= =?us-ascii?Q?YW5/ZI5yMR97F5eG6bePQYE4GpiHq7HYx8bi9JcSXulZ5vF9uNEsofQlbyf8?= =?us-ascii?Q?YSK9U4ca2m2Gvghc4zwejUWkwCLyQqf8rER4tGEk2LuazenZgtdsnJrmnSNe?= =?us-ascii?Q?CIT2yqQqPPG0DZJpZPQ=3D?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(7416014)(376014)(1800799024)(82310400026)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Dec 2025 18:08:30.7336 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 51920dbc-c28a-45e4-3348-08de374df5c7 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: MWH0EPF000989E5.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB7552 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 b4bed40ef7c0..a31d0f97f916 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -1005,8 +1005,12 @@ 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