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Mon, 29 Sep 2025 17:26:18 -0700 From: Besar Wicaksono To: , , , , CC: , , , , , , , , Subject: [PATCH v3 1/5] perf/arm_cspmu: Add arm_cspmu_acpi_dev_get Date: Tue, 30 Sep 2025 00:26:00 +0000 Message-ID: <20250930002604.346306-2-bwicaksono@nvidia.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250930002604.346306-1-bwicaksono@nvidia.com> References: <20250930002604.346306-1-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: CO1PEPF000044F0:EE_|BN7PPFD91879A44:EE_ X-MS-Office365-Filtering-Correlation-Id: db6e2acf-4ed9-4711-ffa0-08ddffb7ff38 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?FrX3UM8zxNo87DYmHpSVWnKlqC5Ca9cq5ts19Q41bTBHGXx3LdCxE3aGJAfu?= =?us-ascii?Q?3P/v94QvdkWZQS8aKvlemroC+JqP0mrveA9pz0FKAEnyVZESUztuPzCWXnCL?= =?us-ascii?Q?zbBNiTuT2204eZAFhNqbTIyNJOWY5dyh91frxlPp6KILCnJ1oQNRjHMGiucI?= =?us-ascii?Q?pB/7k+QMAf9FpQTtXAVHBgfeDA2MZ3Y4UnkkW5FMGY7FjHRI+2naZ4JFXlCY?= =?us-ascii?Q?DJGTiUyrEFQo8tGCOHqevaXv4+b3Di24WNptzAulzy65Kk/It67ziWSqU/EA?= =?us-ascii?Q?lXO+e/HohDcULrBoBO7x99xgSWA43svdtKCzUy/yBsbE/u9Al1S6uQXScwJT?= =?us-ascii?Q?8jehInXUfwxvIPjGWBsfydNn8X1sygHWnAkRh9EIngbhHWUBgUFOASkqzDai?= =?us-ascii?Q?/yNuvFrbRSy+FZ5PBSBZCa0za2Nr5esAqQEkmC7ktHuU0zd03Hg+lDKyhsyz?= =?us-ascii?Q?5IqqaPC+ZBcC7eMkIQO/UIGY5TA411nWajTpAeQRzPCm8IPxIABLWycVyPc7?= =?us-ascii?Q?78HT7+eQfRnouylFg5RszyYIiaIwFOSJCUuCS2cXgEB2SsMCSm+lTKeKEjR2?= =?us-ascii?Q?LweVU5Ve7zCWsv0kUw6AR/rloIaqFg0TbMTN5+zOUAbWi2dnsj4xPEGPdqSP?= =?us-ascii?Q?92IK7CUisNQejkT6g7N09xtnsgfVDzwLk7BVKjdcduYJfnGJZKY6XqaDjuhH?= =?us-ascii?Q?li6YNb/S+2xSP0hM4Mj3p/O7koJgVUpO/J5oO7rk03lf84IpUg5T4pS4KFX2?= =?us-ascii?Q?jHMngsSM7utC1PFPytfrxxd9E1UmF0f5THJTYzy2KWT760jISLWreBLyyHxl?= =?us-ascii?Q?NcPU1GXcGyteFtdCET+klm0yvfm2X1N8H1xTvA7voTmY0Skd9rO2zo9U8hlP?= =?us-ascii?Q?F6ogA8KQXeCm0NZyRuCaVAJ0pc/LPEb4YlJJs9E9eCchMXegdVDt0HRn0gPy?= =?us-ascii?Q?oKQfKOrhz+hfx8hpHpZcTMGuGsKUTw6TqIU7XAOO3QVg9kWGV25PcwDmtf0z?= =?us-ascii?Q?KfT7/VAKUeMt+dgUE3mk2GliYO/KLL/825tUiQhRKHQaJF1kYrjylGkumDMn?= =?us-ascii?Q?7QaWxLRLXliCd0u04SS1Cw9ih0LWeYk8BNXnTFlhXXddFuf21MhJsNl30L1q?= =?us-ascii?Q?nOmIoxEgF/2s4WY6X0CYCTok/2i0DmEpNSkYpSRQcsDs4CmpTKmC7QltF4Tj?= =?us-ascii?Q?Os2F7DLbiREu09BFIUfuB0Q9O/HZ58vLXsc58Wy+H6QtSmMoXJAppajMZpfb?= =?us-ascii?Q?iFeXnYHtxdy5jENYzBoBBt1b/tKeFMov7EybefJ/y2JREDFTj+jB8mQx0Qr6?= =?us-ascii?Q?jajnsiVxxVF0oJsmQWKJTLriJPzPC7A8Nm6rj0tSHOs5wWxb7ORbprsYbElD?= =?us-ascii?Q?71UdvBrg6CRAgQTluHDrJ5Yw+m/PdySjfDcOZlhiyXzcoSsZXBjx+jHFpS7H?= =?us-ascii?Q?yb2GGG4LiiuD6o7FutnYcQFP/GaKaH+QrEAE5nFH7JB769iD6+CWhUnphe3n?= =?us-ascii?Q?kfF4XafyKXOtV7wqVQWhTpCV8g4X932fJjw13TT5mgEqgK/HAzumjoF0GP1n?= =?us-ascii?Q?oLKcGnK2s+40WPbvJK4=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)(376014)(82310400026)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Sep 2025 00:26:28.1870 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: db6e2acf-4ed9-4711-ffa0-08ddffb7ff38 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: CO1PEPF000044F0.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN7PPFD91879A44 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 | 22 ++++++++++++++++++++++ drivers/perf/arm_cspmu/arm_cspmu.h | 15 +++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/ar= m_cspmu.c index efa9b229e701..75b2d80f783e 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -1090,6 +1090,28 @@ 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)); + sprintf(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 19684b76bd96..bba513224586 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.h +++ b/drivers/perf/arm_cspmu/arm_cspmu.h @@ -8,6 +8,7 @@ #ifndef __ARM_CSPMU_H__ #define __ARM_CSPMU_H__ =20 +#include #include #include #include @@ -222,4 +223,18 @@ 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 2.50.1