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client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by SJ5PEPF000001D1.mail.protection.outlook.com (10.167.242.53) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9723.19 via Frontend Transport; Thu, 19 Mar 2026 01:15:17 +0000 Received: from ethanolx50f7host.amd.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Wed, 18 Mar 2026 20:15:16 -0500 From: Smita Koralahalli To: , , , , CC: Ard Biesheuvel , Alison Schofield , Vishal Verma , "Ira Weiny" , Dan Williams , Jonathan Cameron , Yazen Ghannam , Dave Jiang , Davidlohr Bueso , Matthew Wilcox , Jan Kara , "Rafael J . Wysocki" , Len Brown , Pavel Machek , Li Ming , Jeff Johnson , "Ying Huang" , Yao Xingtao , Peter Zijlstra , Greg Kroah-Hartman , Nathan Fontenot , Terry Bowman , Robert Richter , Benjamin Cheatham , Zhijian Li , Borislav Petkov , Smita Koralahalli , Tomasz Wolski Subject: [PATCH v7 2/7] dax/hmem: Gate Soft Reserved deferral on DEV_DAX_CXL Date: Thu, 19 Mar 2026 01:14:55 +0000 Message-ID: <20260319011500.241426-3-Smita.KoralahalliChannabasappa@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20260319011500.241426-1-Smita.KoralahalliChannabasappa@amd.com> References: <20260319011500.241426-1-Smita.KoralahalliChannabasappa@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: SJ5PEPF000001D1:EE_|DM6PR12MB4297:EE_ X-MS-Office365-Filtering-Correlation-Id: a2df837d-f9b2-49c8-b56a-08de8554fbc2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|1800799024|376014|7416014|82310400026|18002099003|22082099003|56012099003; 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:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700016)(1800799024)(376014)(7416014)(82310400026)(18002099003)(22082099003)(56012099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: mr8NXY+3uS1DzFcaCFJ2mv+xaCUxboSczPexnWBV3KRqRH8fE6c1hkiIZntoieenDd5XV6YUqVEwJeEpxhyA9AvbCfif+FWgol2NZ6ELDEt5L/ApKuBgQi1BSNJy8jJpB3R5GwuFxQVU0S2wFSrYVIqv9MSeb/33pDMTEDrYILydQxJgOi1M82pPGrYtVZHO6SQPA/wICto5EISInJ7CxmGDtSM4wrg4nb6t0P6sNuzf4XLlroqcWsn7Rl0ZHwwBezJ5+K/okaIs3gyrHDzqzEfEiJyEsFi67NlOtqZvsrdDzyAapSjyKHAHivZ/luPVtX5Z2Pz9fIF5SMhlVuGuGSN21NNs/qY7VaYZ5I9EJvuoe3qHQ7KofqWR2WPf+9Ec8Y3dWzUlInmT1OciV3In83Wiw/2CYxO5/aJ9238JlwMypd1qE5SKltzXFt5AfOwD X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Mar 2026 01:15:17.9675 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a2df837d-f9b2-49c8-b56a-08de8554fbc2 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: SJ5PEPF000001D1.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4297 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Dan Williams Replace IS_ENABLED(CONFIG_CXL_REGION) with IS_ENABLED(CONFIG_DEV_DAX_CXL) so that HMEM only defers Soft Reserved ranges when CXL DAX support is enabled. This makes the coordination between HMEM and the CXL stack more precise and prevents deferral in unrelated CXL configurations. Signed-off-by: Dan Williams Signed-off-by: Smita Koralahalli Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Reviewed-by: Alison Schofield --- drivers/dax/hmem/hmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dax/hmem/hmem.c b/drivers/dax/hmem/hmem.c index 008172fc3607..1e3424358490 100644 --- a/drivers/dax/hmem/hmem.c +++ b/drivers/dax/hmem/hmem.c @@ -66,7 +66,7 @@ static int hmem_register_device(struct device *host, int = target_nid, long id; int rc; =20 - if (IS_ENABLED(CONFIG_CXL_REGION) && + if (IS_ENABLED(CONFIG_DEV_DAX_CXL) && region_intersects(res->start, resource_size(res), IORESOURCE_MEM, IORES_DESC_CXL) !=3D REGION_DISJOINT) { dev_dbg(host, "deferring range to CXL: %pr\n", res); --=20 2.17.1