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Mon, 26 Jan 2026 10:12:50 -0800 From: Besar Wicaksono To: , , , CC: , , , , , , , , , , , , , Besar Wicaksono Subject: [PATCH 3/8] perf/arm_cspmu: Add arm_cspmu_acpi_dev_get Date: Mon, 26 Jan 2026 18:11:50 +0000 Message-ID: <20260126181155.2776097-4-bwicaksono@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260126181155.2776097-1-bwicaksono@nvidia.com> References: <20260126181155.2776097-1-bwicaksono@nvidia.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-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ5PEPF000001F5:EE_|SN7PR12MB7225:EE_ X-MS-Office365-Filtering-Correlation-Id: b1e1b9de-d1f3-4b23-b68b-08de5d068b56 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|376014|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?qbA5fhkLK5AxXaT3eaYqjSQcg8fkFSbA5+SUIG85Wgva8HW1D6lL5sbSdWsv?= =?us-ascii?Q?EZvpCo0oAEFSEQgHxCwZqrFhVmHcAUGz6t8fEP+5wBroEkeFndpIaWesX3HM?= =?us-ascii?Q?24XYuJiyFirCuMYdGAwLxsiroMK/d1yX11foqz9A1sKZtMbW3Lzkb5PsNQn6?= =?us-ascii?Q?3GrwHMuug/+gFUcJpIuHFHznpieBS8XA6X2ELA8q811DHttUSFyiZRaOupWT?= =?us-ascii?Q?k5VR0dPLkdq3JX1e6vTlk8nIIfqQVKMHH50sUQczPk5/ybnAehRIC4SDnMbR?= =?us-ascii?Q?6rz6hMef7S/nTpZ3eQ5jsDRrFdwa/4L8G/YPAXWfOjfocZaBwGJBivcPOC4/?= =?us-ascii?Q?/2F3qi9WcsPUb6vfYBetKneXv2UuVbcPmQvgeZlputXa1aU6xBQZPB2VyDd/?= =?us-ascii?Q?RSWhHJFNSInKHf48Z8404TnmvC/0kMBiVa4PT+grsMAqU6Z8GgelwdjUilxG?= =?us-ascii?Q?YIhKNOOuUe2r23+b7oSHZl/750C5XJ/QtIVNqcRTgkkJdapuigFKk5Ucbmjo?= =?us-ascii?Q?SsS+otU+sMje7fe15xIMc8loH6IMuwl1KEu1E9bEQGaHWhNx/LDwCnTNc5Xq?= =?us-ascii?Q?o5GsC6AuGljXi2B9yckakobX6AFt0uJovo0Il4mXD4SBEv2nq4Fo1dA79qb+?= =?us-ascii?Q?UFtEULEY5UTJQ+1NhIPSxI6pPt4eU8/kG8G8TQSbr15Dh3PPd1uHgVNE71Py?= =?us-ascii?Q?0Y7Owj/ljtv5AYWHfXCaHk8SeW+ecFV1BrRPmbPLPxOxu2LcoVNASUankzOs?= =?us-ascii?Q?vgYls70hkPZiT2HTWgTC24Z7iYwKQK97UTJ2F/ggQJ8JPIOODBIKGbxOOYNs?= =?us-ascii?Q?hcozA2zMrzQW5a8fp6DdX6yJVKSCb89p8yUM81hYVGIewcRHM1AbMz0cojzD?= =?us-ascii?Q?l7BidSvlVgX+TAgORJ56PBu6JiXKN1w9bt+CUGmjthBeH4Q2kvEKiH3SXhjH?= =?us-ascii?Q?FN0ZADSLkHmqA0VaFEygFn3dRMbkyMm/n/UoC3PI10N8LTHmWKhU0kUW7jFd?= =?us-ascii?Q?A9Fh6Noyeu1G94PzO9TQezb0WOJe/jamcX1Y8jSREhu6QvZY32r/+1h6mljx?= =?us-ascii?Q?uPub8515IFSHIBqQw5UwuRukQ2uHx+CiipuEz8uS35dbfXTOgOPMsRRgdY56?= =?us-ascii?Q?vetxGmgVdtwXkEkf4SrDtmF+tvdAmKL3Ffi68eUrnewlqQZaiNjlNdot++dU?= =?us-ascii?Q?B9YbzZc+XjYEGlPhAfwW9n5H7FLdHXQqfTGUyKuvBck5bwOqny88YtiiVHe2?= =?us-ascii?Q?7j3b8W9AbDFwDGtXxOcUhPLDKA5/n5b5nTv4+/A4yK7Ukvjw5cXSbzAhvK66?= =?us-ascii?Q?bngSw5795pHojiFArx9/abCMsZ4AdY3NCS6e8OMgFKo5wjWvKnPtRjkEmbgr?= =?us-ascii?Q?I7Hnj7MrXWgR0IQAIQXZhA0cbj7IWYF8vsJo19LsI+0F9vntIo+y7Jb6tdfn?= =?us-ascii?Q?l9lqK6/UnVZY1BjA8V9X7/uiUoAUnYYgz5QkyLsbxouAlEYTgnbxO2uz4LxB?= =?us-ascii?Q?lDA5Cxk55FSjs0uTstVz+96mTYkXHnSoPqgboR/V3JG/PQ+5oU7uKqw4A1mX?= =?us-ascii?Q?Du9EphZ0klJXdiEpsHJf9tBkOUXzjOJw9hxSX6PVCGtVSmbEZd4hYYCWrgDc?= =?us-ascii?Q?whvuSuGArSY7qNDS0640FjHecc39QSCJpCVGkqhv73mXC+mnVjsxpc8VGMZg?= =?us-ascii?Q?N+v6oQ=3D=3D?= X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(36860700013)(376014)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Jan 2026 18:13:02.1795 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b1e1b9de-d1f3-4b23-b68b-08de5d068b56 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ5PEPF000001F5.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB7225 Content-Type: text/plain; charset="utf-8" Add interface to get ACPI device associated with the PMU. This ACPI device may contain additional properties not covered by the standard properties. Signed-off-by: Besar Wicaksono --- drivers/perf/arm_cspmu/arm_cspmu.c | 24 +++++++++++++++++++++++- drivers/perf/arm_cspmu/arm_cspmu.h | 17 ++++++++++++++++- 2 files changed, 39 insertions(+), 2 deletions(-) diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/ar= m_cspmu.c index 34430b68f602..dadc9b765d80 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -16,7 +16,7 @@ * The user should refer to the vendor technical documentation to get deta= ils * about the supported events. * - * Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights re= served. + * Copyright (c) 2022-2026, NVIDIA CORPORATION & AFFILIATES. All rights re= served. * */ =20 @@ -1132,6 +1132,28 @@ static int arm_cspmu_acpi_get_cpus(struct arm_cspmu = *cspmu) =20 return 0; } + +struct acpi_device *arm_cspmu_acpi_dev_get(const struct arm_cspmu *cspmu) +{ + char hid[16]; + char uid[16]; + struct acpi_device *adev; + const struct acpi_apmt_node *apmt_node; + + apmt_node =3D arm_cspmu_apmt_node(cspmu->dev); + if (!apmt_node || apmt_node->type !=3D ACPI_APMT_NODE_TYPE_ACPI) + return NULL; + + memset(hid, 0, sizeof(hid)); + memset(uid, 0, sizeof(uid)); + + memcpy(hid, &apmt_node->inst_primary, sizeof(apmt_node->inst_primary)); + snprintf(uid, sizeof(uid), "%u", apmt_node->inst_secondary); + + adev =3D acpi_dev_get_first_match_dev(hid, uid, -1); + return adev; +} +EXPORT_SYMBOL_GPL(arm_cspmu_acpi_dev_get); #else static int arm_cspmu_acpi_get_cpus(struct arm_cspmu *cspmu) { diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/ar= m_cspmu.h index cd65a58dbd88..320096673200 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.h +++ b/drivers/perf/arm_cspmu/arm_cspmu.h @@ -1,13 +1,14 @@ /* SPDX-License-Identifier: GPL-2.0 * * ARM CoreSight Architecture PMU driver. - * Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights re= served. + * Copyright (c) 2022-2026, NVIDIA CORPORATION & AFFILIATES. All rights re= served. * */ =20 #ifndef __ARM_CSPMU_H__ #define __ARM_CSPMU_H__ =20 +#include #include #include #include @@ -255,4 +256,18 @@ int arm_cspmu_impl_register(const struct arm_cspmu_imp= l_match *impl_match); /* Unregister vendor backend. */ void arm_cspmu_impl_unregister(const struct arm_cspmu_impl_match *impl_mat= ch); =20 +#if defined(CONFIG_ACPI) +/** + * Get ACPI device associated with the PMU. + * The caller is responsible for calling acpi_dev_put() on the returned de= vice. + */ +struct acpi_device *arm_cspmu_acpi_dev_get(const struct arm_cspmu *cspmu); +#else +static inline struct acpi_device * +arm_cspmu_acpi_dev_get(const struct arm_cspmu *cspmu) +{ + return NULL; +} +#endif + #endif /* __ARM_CSPMU_H__ */ --=20 2.43.0