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Thu, 1 Oct 2026 07:01:20 -0500 From: To: , CC: , , , , , , , Alejandro Lucero Subject: [PATCH v2 2/4] cxl/region: Add region reference in memdev attach Date: Thu, 1 Oct 2026 14:20:21 +0100 Message-ID: <20261001132023.17032-3-alucerop@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261001132023.17032-1-alucerop@amd.com> References: <20261001132023.17032-1-alucerop@amd.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00002314:EE_|CH3PR12MB647349:EE_ X-MS-Office365-Filtering-Correlation-Id: 98dbdab6-39c8-4d04-1b47-08df1fb3b607 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|82310400026|23010399003|376014|1800799024|10067099003|11063799006|56012099006|22082099003|18002099003|6133799003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb08.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700016)(82310400026)(23010399003)(376014)(1800799024)(10067099003)(11063799006)(56012099006)(22082099003)(18002099003)(6133799003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: tnUUcdFF2a9STF+RKFl3EQghWkRhcbtXqisHmtswg9cDZEmKzBb6089HDflpDKjFNEaFx32QgTKaOVmY6YlIy/f/e7XOo0hYsZom5tTMBaNuFZHukg5z7HKKOVUayFDq4whN2Lx4gyo6dVeTWN7UXG5u24w9OvrvD9D1kChPEyeaXTyHrMJ3d5JUu0g8NtUtCjTpwZ/O+9obTox5EToo1EyrLJ3ATNWZ5ynEdRY4pLknOM/9hDXDm7fYQ+bYNqmS2LSbTkCvLpYre6nzUXeZxmrWY4kCej3jdJU7elcSIKMOU/NVkH39tS3z0o3/t6dY7tWpfsAs0XcEHPC+u3pgv5xPssUy1Jo+Dkii2+GTOQ8jyNcJmIhQ2+QECvMYjuYDQlXtYBPLXfQSSsAFiejhOucbdaErY/sk5H0yRHIiDk59SIZPAhJ5HZgb0pUMro0r X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Oct 2026 12:01:22.2414 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 98dbdab6-39c8-4d04-1b47-08df1fb3b607 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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00002314.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB647349 From: Alejandro Lucero Use a new field in cxl_attach_region struct for easily link it with the region the memdev is attached to. This facilitates device links creation where such a region is the supplier with non-PF0 physical functions wanting to use the CXL region being the consumers. Signed-off-by: Alejandro Lucero --- drivers/cxl/core/region.c | 1 + drivers/cxl/cxlmem.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index 27e63e6dab7c..78ca7ebc3e55 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -4132,6 +4132,7 @@ int cxl_memdev_attach_region(struct cxl_memdev *cxlmd) if (rc) return rc; + attach->cxlr = cxlr; attach->hpa_range = (struct range) { .start = cxlr->params.res->start, .end = cxlr->params.res->end, diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index c401e3a1af06..c598561b8e5f 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -104,6 +104,7 @@ struct cxl_memdev_attach { /** * struct cxl_attach_region - coordinate mapping a region at memdev registration * @attach: common core attachment descriptor + * @cxlr: cxl region the memdev is attached to. * @hpa_range: physical address range of the region * * For the common simple case of a CXL device with private (non-general purpose @@ -112,6 +113,7 @@ struct cxl_memdev_attach { */ struct cxl_attach_region { struct cxl_memdev_attach attach; + struct cxl_region *cxlr; struct range hpa_range; }; -- 2.34.1