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The structure is dynamically allocated, though it contains only a few pointers in it. This also requires to check two pointes to check for the existance of a callback. Simplify the allocation, release and handler check by embedding the ops statically in struct cxl_root_decoder. Implementation is equivalent to how struct cxl_root_ops handles the callbacks. Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Signed-off-by: Robert Richter --- drivers/cxl/acpi.c | 8 ++------ drivers/cxl/core/port.c | 1 - drivers/cxl/core/region.c | 20 +++++--------------- drivers/cxl/cxl.h | 2 +- 4 files changed, 8 insertions(+), 23 deletions(-) diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c index bd2e282ca93a..cef3e07244fd 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -475,12 +475,8 @@ static int __cxl_parse_cfmws(struct acpi_cedt_cfmws *c= fmws, cxlrd->qos_class =3D cfmws->qtg_id; =20 if (cfmws->interleave_arithmetic =3D=3D ACPI_CEDT_CFMWS_ARITHMETIC_XOR) { - cxlrd->ops =3D kzalloc(sizeof(*cxlrd->ops), GFP_KERNEL); - if (!cxlrd->ops) - return -ENOMEM; - - cxlrd->ops->hpa_to_spa =3D cxl_apply_xor_maps; - cxlrd->ops->spa_to_hpa =3D cxl_apply_xor_maps; + cxlrd->ops.hpa_to_spa =3D cxl_apply_xor_maps; + cxlrd->ops.spa_to_hpa =3D cxl_apply_xor_maps; } =20 rc =3D cxl_decoder_add(cxld); diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c index 8128fd2b5b31..fef3aa0c6680 100644 --- a/drivers/cxl/core/port.c +++ b/drivers/cxl/core/port.c @@ -459,7 +459,6 @@ static void cxl_root_decoder_release(struct device *dev) if (atomic_read(&cxlrd->region_id) >=3D 0) memregion_free(atomic_read(&cxlrd->region_id)); __cxl_decoder_release(&cxlrd->cxlsd.cxld); - kfree(cxlrd->ops); kfree(cxlrd); } =20 diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index b06fee1978ba..095af0f4760f 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -2924,16 +2924,6 @@ static bool cxl_is_hpa_in_chunk(u64 hpa, struct cxl_= region *cxlr, int pos) return false; } =20 -static bool has_hpa_to_spa(struct cxl_root_decoder *cxlrd) -{ - return cxlrd->ops && cxlrd->ops->hpa_to_spa; -} - -static bool has_spa_to_hpa(struct cxl_root_decoder *cxlrd) -{ - return cxlrd->ops && cxlrd->ops->spa_to_hpa; -} - u64 cxl_dpa_to_hpa(struct cxl_region *cxlr, const struct cxl_memdev *cxlmd, u64 dpa) { @@ -2988,8 +2978,8 @@ u64 cxl_dpa_to_hpa(struct cxl_region *cxlr, const str= uct cxl_memdev *cxlmd, hpa =3D hpa_offset + p->res->start + p->cache_size; =20 /* Root decoder translation overrides typical modulo decode */ - if (has_hpa_to_spa(cxlrd)) - hpa =3D cxlrd->ops->hpa_to_spa(cxlrd, hpa); + if (cxlrd->ops.hpa_to_spa) + hpa =3D cxlrd->ops.hpa_to_spa(cxlrd, hpa); =20 if (!cxl_resource_contains_addr(p->res, hpa)) { dev_dbg(&cxlr->dev, @@ -2998,7 +2988,7 @@ u64 cxl_dpa_to_hpa(struct cxl_region *cxlr, const str= uct cxl_memdev *cxlmd, } =20 /* Simple chunk check, by pos & gran, only applies to modulo decodes */ - if (!has_hpa_to_spa(cxlrd) && (!cxl_is_hpa_in_chunk(hpa, cxlr, pos))) + if (!cxlrd->ops.hpa_to_spa && !cxl_is_hpa_in_chunk(hpa, cxlr, pos)) return ULLONG_MAX; =20 return hpa; @@ -3033,8 +3023,8 @@ static int region_offset_to_dpa_result(struct cxl_reg= ion *cxlr, u64 offset, * If the root decoder has SPA to CXL HPA callback, use it. Otherwise * CXL HPA is assumed to equal SPA. */ - if (has_spa_to_hpa(cxlrd)) { - hpa =3D cxlrd->ops->spa_to_hpa(cxlrd, p->res->start + offset); + if (cxlrd->ops.spa_to_hpa) { + hpa =3D cxlrd->ops.spa_to_hpa(cxlrd, p->res->start + offset); hpa_offset =3D hpa - p->res->start; } else { hpa_offset =3D offset; diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index 231ddccf8977..6524b242e8c4 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -451,7 +451,7 @@ struct cxl_root_decoder { void *platform_data; struct mutex range_lock; int qos_class; - struct cxl_rd_ops *ops; + struct cxl_rd_ops ops; struct cxl_switch_decoder cxlsd; }; =20 --=20 2.47.3 From nobody Sun Feb 8 09:13:19 2026 Received: from CH5PR02CU005.outbound.protection.outlook.com (mail-northcentralusazon11012042.outbound.protection.outlook.com [40.107.200.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 014E62F8BC9; 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De Francesco" , Terry Bowman , Joshua Hahn , Robert Richter Subject: [PATCH v4 2/3] cxl/acpi: Group xor arithmetric setup code in a single block Date: Fri, 14 Nov 2025 08:58:42 +0100 Message-ID: <20251114075844.1315805-3-rrichter@amd.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251114075844.1315805-1-rrichter@amd.com> References: <20251114075844.1315805-1-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: SJ1PEPF000023DA:EE_|SJ5PPF0C60B25BF:EE_ X-MS-Office365-Filtering-Correlation-Id: 63ad7295-19b1-47e7-980a-08de2353b6d5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|376014|82310400026|7416014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?kTLDCRLDWMuVMkg3uColla3NqIsRu1XheV63OsVW5Y7p8vOYr2oUaSxgOWEy?= =?us-ascii?Q?WH0HeSV0VJScPUzTbENXUA1iTQeePI5WzTFqjJ2sZ5llAlZAwbRgoDuOcLUF?= =?us-ascii?Q?qxvrl5phHarz5lBFlJxwTshW97ZPkmVXo//HLUszgvrFb7n2+cBdOlGc7On4?= =?us-ascii?Q?MsO2GicBU6o1YdqKML9EH/DT61JhCowfSQlQD+/YrhNXHcUJR3pp64eMjXyn?= =?us-ascii?Q?TVPR6O1H07slURlMbYQbeeIN/GLsROdOgTzBjHVy+0KYShmQgoeogwYJHinG?= =?us-ascii?Q?Fgqamz6AAeNMnvZOp+W9+bIPdca8eTHFKVWV3kOaBdIE54Pxn2ubozD2FKUo?= =?us-ascii?Q?LMUpoF4fpHi1zbWg1OAI5f98bdDAmE2BVadY6/X1HO3Z1gHdC0Jo9lmRN0K9?= =?us-ascii?Q?leGIEMamdtI5zllSstSsDyIG0USA1mmNWGo1wgeII72lmE2T/0caV5nre/Bp?= =?us-ascii?Q?YvJsFlAfhMkpzvmjodxTxlmX93IaSKf6ZMQpdxX7urY8Tq+o8FcGwMunLBDU?= =?us-ascii?Q?mmM6TXlRWXF84XA9PNlKFR0dDy4mQvMImStC2Rx7M83BzHKO76bOUrkTYQWI?= =?us-ascii?Q?CiASwbFvD6LxgNU1fCuQ7B1xXW+WnWNmzxazgfCTFBURCWt7+Nm0HC8zVuyN?= =?us-ascii?Q?iGUMn3QDaWYIU5nHjUWSAUzfwCOUrJxyE27CW7PPO557yOfdiP7qWEC7d1Rb?= =?us-ascii?Q?vy0N34uFKi57dLJh1mrNoBQXzii7n+9hyrDO1EXV6v/zZEqdGEsW7oSIJ5Ne?= =?us-ascii?Q?nGJnL0UNXZZSQtsBwNwgIG4l3Vps4vPH/uK3/M67E5WFUqbzLM0a3guHSkFc?= =?us-ascii?Q?JbRrugr1mW8j4b6IdOaRmyEkTXZsiytiCCGrPkJ0rit5zY7oR191xVrDGLrB?= =?us-ascii?Q?zNyQsnMmSos5blXdAeM5msTupfJOdoApgd+59jKPgvUb6zN3w7RppVPTqtSC?= =?us-ascii?Q?mU4ll63tBTyJpZzTfwr7GNjkKdyEtQBnoCGoxEn6kB2ISLfkNVsed+9SVsKQ?= =?us-ascii?Q?Ua96tUv4GozUHFSOBJpYXv0+F5TIYjWhC1YLdYgvpA+iFOr7UrCPn/g74VVj?= =?us-ascii?Q?T6XhG8mTVhiQkzJmqbaud3KLAMO7ylCdJIlSV9cDW2l+eDUOdYf5iDyILnJ1?= =?us-ascii?Q?GgSwSnUH67JrDUYtgDYtLBBpgVUrO2v4bTpByVZELsa7ebqiDMPIcy+DVvmh?= =?us-ascii?Q?0/lHd0HRO9IVCsh9AHH+nCignTA8xlQ4mBOJdgQixI1wG3Hng2mIedZh18nb?= =?us-ascii?Q?UuSGG00YBJAcFZZs9a/sZRtHcGZUJBQ3ooOcETkWeuFAYSgPNIV7zY1AhyEI?= =?us-ascii?Q?uB9FGbOVV7esS1I7Aln2ANAMy4GgI6gtDQm2VofBCwgJSX5ZDbHBxD7Hs9RS?= =?us-ascii?Q?C2P6jYMn54hl0mE8qtXYO7j1dNgS04vCiXixeBE5M7luAltwwR9KL0+REAyR?= =?us-ascii?Q?mR8VbTMPA+6tQuiitWDkOR4efFpr8BuN/C0kUygKW/wTqbym2GWXYk8SI9mK?= =?us-ascii?Q?i9Q5iYp7uf3b2XqZOdzkjUoZCDczPhWDpmb6k7cE/TcVhUS0bzW/4ieu29GR?= =?us-ascii?Q?n6+o0/uldTMIDjORa9E=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)(1800799024)(376014)(82310400026)(7416014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Nov 2025 07:59:18.8552 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 63ad7295-19b1-47e7-980a-08de2353b6d5 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: SJ1PEPF000023DA.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ5PPF0C60B25BF Content-Type: text/plain; charset="utf-8" Simplify the xor arithmetric setup code by grouping it in a single block. No need to split the block for QoS setup. It is safe to reorder the call of cxl_setup_extended_linear_cache() because there are no dependencies. Reviewed-by: Jonathan Cameron Signed-off-by: Robert Richter --- v2: spell fix in descripton (Jonathan), --- --- drivers/cxl/acpi.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c index cef3e07244fd..0a1bad3cafa7 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -453,8 +453,6 @@ static int __cxl_parse_cfmws(struct acpi_cedt_cfmws *cf= mws, ig =3D CXL_DECODER_MIN_GRANULARITY; cxld->interleave_granularity =3D ig; =20 - cxl_setup_extended_linear_cache(cxlrd); - if (cfmws->interleave_arithmetic =3D=3D ACPI_CEDT_CFMWS_ARITHMETIC_XOR) { if (ways !=3D 1 && ways !=3D 3) { cxims_ctx =3D (struct cxl_cxims_context) { @@ -470,15 +468,14 @@ static int __cxl_parse_cfmws(struct acpi_cedt_cfmws *= cfmws, return -EINVAL; } } - } - - cxlrd->qos_class =3D cfmws->qtg_id; - - if (cfmws->interleave_arithmetic =3D=3D ACPI_CEDT_CFMWS_ARITHMETIC_XOR) { cxlrd->ops.hpa_to_spa =3D cxl_apply_xor_maps; cxlrd->ops.spa_to_hpa =3D cxl_apply_xor_maps; 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De Francesco" , Terry Bowman , Joshua Hahn , Robert Richter Subject: [PATCH v4 3/3] cxl/region: Remove local variable @inc in cxl_port_setup_targets() Date: Fri, 14 Nov 2025 08:58:43 +0100 Message-ID: <20251114075844.1315805-4-rrichter@amd.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251114075844.1315805-1-rrichter@amd.com> References: <20251114075844.1315805-1-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: SJ1PEPF000023D5:EE_|DM4PR12MB6398:EE_ X-MS-Office365-Filtering-Correlation-Id: abc2af39-04ac-4339-3e87-08de2353b864 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|36860700013|1800799024|376014|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?DFVipWsXBTB2dPM+mkBPSptaeLOBI86IZbDJkEiD9bXEv6aa4lk6C6jRbz6v?= =?us-ascii?Q?RmedqtqOndrFxsqYZN3GReqvYh3Of3X3YFsMjGiN+A1WCPuGFRAemtegjVfb?= =?us-ascii?Q?Lic2F89CK+5PzmWZ87XALVJdo1D2Y8KCrexkAgANxIgVJwIrCs2wMNP/GaD6?= =?us-ascii?Q?FLNIijdaPEr4RSwbWQiEAH/TKcCFw2ehy7lxb1OgWasktxlhpCV91u2dkPYa?= =?us-ascii?Q?e716JNxOHhou2TVh2ywYEECoyhk+dsJXS5aXTwQpM2uYilLGlqrc8X3kp5Bz?= =?us-ascii?Q?ByJ93+lv+s8pqapYXgEoifvqbzG/R+1f/YNZKKhUCNeApURv8qvB2kPF+4o9?= =?us-ascii?Q?VUvPM5pU+hQhioCLMME7I4lGdggf8ov3q3VmRL0Q1jZ7WQPoJvi1YZpbtZCg?= =?us-ascii?Q?VL4mh05zPuD1LwMbgaRzFv3DjtxoTEgdDLEopXIqTyYKjN1RARGbtHRKySSs?= =?us-ascii?Q?u89nKEZUCM4AaE+1FLTkMS89ciytmfyF0Sy4EUNoiHE0/FZvcBYuEw6rHttA?= =?us-ascii?Q?98RZwPcznNRNu9293hun+QhfGMU+hD5BIxakO/Qh2XOFXB4LFR9r4U9kf7Zd?= =?us-ascii?Q?RkdX0pOsl2UejuzKOn+ALx4RsOKqzIM5S3h9SiNzTG+RA7b/TU54XXfvRdHV?= =?us-ascii?Q?JUeULf+3gqyrCZCypms2PF/XdYcwoRdyF012c4H4N8P11PhQMp33kqHi1F0H?= =?us-ascii?Q?gZdUv9yYUfvw60vkpEzvTf+WeDOHGh8bpUbcUxdQ9rfHhc5NlTLq4Y9KYxBO?= =?us-ascii?Q?RWI2o9LCbA8RQP/QhQOkkep9PDhaSgzd8vElyYnQCde8zxnfz80Zgln6LGLb?= =?us-ascii?Q?WZcyvi/kvXtnxA4dFmgxS1XnqXhVMJu8hj4qYCVUr9Lo/IKC0duu/5JMKX5u?= =?us-ascii?Q?qVJFiI4Q1b+vASJwH7GZwFGrOz5rNla8rvGsBwe3RFZpeqkVDClHj+vzn8aM?= =?us-ascii?Q?o251YK7Xoyg39B8qebgn0j51IBruxJ3y2jDEe1WkuppyKDo70Aw55Zgcx6/p?= =?us-ascii?Q?WMowr0/GiqYcwdKrOpKnCIVcRYFxqGRTw0k08RBRViryY1U7IEmJROem65v5?= =?us-ascii?Q?Kjy0J1KfePJHMrmr7wGvfm8zgRSO5Lh3qR7YgVEN7e41gn099bpcQOrqQjzL?= =?us-ascii?Q?91s4M+f/6jQkcNZmK8Xy0bPbcDyLifIVGMlpnFtL+Y5fAWcOWVCa3b+qlMPa?= =?us-ascii?Q?yz6EI1nnAZuD4w5UphekEPEFP+70GSnUv8a47hfmSH+olMMJoar0umWwKAh5?= =?us-ascii?Q?A7gKYNJbeHIQfIEWIiJIYxDVJ/UXJiZaGpTS8spRcw0mW5FphTrKYEauXDYd?= =?us-ascii?Q?DwfrnVio0vupAaJkuK/wjvF5XdG6cxhl4u8G8T1syoUQ7EPNDXkOTA7gZwp6?= =?us-ascii?Q?wWDZ7klp7gvfG+TSoEJM4+ZftL0hxWY/g5oLKyIy/bshyYfL/dTjxyHSdv3t?= =?us-ascii?Q?j5LbsFRG3hYrV7HC+jNxfFfsV0RY8ddwDrcPwPJocgiLattB0xkayKDe3d1F?= =?us-ascii?Q?MYzfPPvjiOAUDoB0awjbjuJV7eFxiGxEWHo3yxvpW2v3CCHkODFeYDFR2CBK?= =?us-ascii?Q?fV+zh7/boUwPBjxqCyo=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)(36860700013)(1800799024)(376014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Nov 2025 07:59:21.4682 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: abc2af39-04ac-4339-3e87-08de2353b864 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: SJ1PEPF000023D5.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6398 Content-Type: text/plain; charset="utf-8" Simplify the code by removing local variable @inc. The variable is not used elsewhere, remove it and directly increment the target number. Reviewed-by: Jonathan Cameron Signed-off-by: Robert Richter --- drivers/cxl/core/region.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index 095af0f4760f..8cdb6a935289 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -1328,7 +1328,7 @@ static int cxl_port_setup_targets(struct cxl_port *po= rt, struct cxl_endpoint_decoder *cxled) { struct cxl_root_decoder *cxlrd =3D to_cxl_root_decoder(cxlr->dev.parent); - int parent_iw, parent_ig, ig, iw, rc, inc =3D 0, pos =3D cxled->pos; + int parent_iw, parent_ig, ig, iw, rc, pos =3D cxled->pos; struct cxl_port *parent_port =3D to_cxl_port(port->dev.parent); struct cxl_region_ref *cxl_rr =3D cxl_rr_load(port, cxlr); struct cxl_memdev *cxlmd =3D cxled_to_memdev(cxled); @@ -1520,9 +1520,8 @@ static int cxl_port_setup_targets(struct cxl_port *po= rt, cxlsd->target[cxl_rr->nr_targets_set] =3D ep->dport; cxlsd->cxld.target_map[cxl_rr->nr_targets_set] =3D ep->dport->port_id; } - inc =3D 1; + cxl_rr->nr_targets_set++; out_target_set: - cxl_rr->nr_targets_set +=3D inc; dev_dbg(&cxlr->dev, "%s:%s target[%d] =3D %s for %s:%s @ %d\n", dev_name(port->uport_dev), dev_name(&port->dev), cxl_rr->nr_targets_set - 1, dev_name(ep->dport->dport_dev), --=20 2.47.3