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CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:satlexmb07.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230040)(1800799024)(36860700013)(82310400026)(376014); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Oct 2025 07:31:32.1568 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 32401e3d-b510-47f8-2abd-08de113d05e7 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: SJ5PEPF000001D5.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV8PR12MB9692 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" This commit introduces a new helper function kfd_lookup_process_by_id which can find a kfd process that identified by its context id from the kfd process table Signed-off-by: Zhu Lingshan Reviewed-by: Felix Kuehling --- drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 1 + drivers/gpu/drm/amd/amdkfd/kfd_process.c | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index b6ad546c400c..44ecdaf02657 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -1062,6 +1062,7 @@ int kfd_create_process_sysfs(struct kfd_process *process); struct kfd_process *kfd_lookup_process_by_pasid(u32 pasid, struct kfd_process_device **pdd); struct kfd_process *kfd_lookup_process_by_mm(const struct mm_struct *mm); +struct kfd_process *kfd_lookup_process_by_id(const struct mm_struct *mm, u16 id); int kfd_process_gpuidx_from_gpuid(struct kfd_process *p, uint32_t gpu_id); int kfd_process_gpuid_from_node(struct kfd_process *p, struct kfd_node *node, diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 6b39d6314a0d..4350552e9648 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -1955,6 +1955,27 @@ struct kfd_process *kfd_lookup_process_by_mm(const struct mm_struct *mm) return p; } +/* This increments the process->ref counter. */ +struct kfd_process *kfd_lookup_process_by_id(const struct mm_struct *mm, u16 id) +{ + struct kfd_process *p, *ret_p = NULL; + unsigned int temp; + + int idx = srcu_read_lock(&kfd_processes_srcu); + + hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) { + if (p->mm == mm && p->context_id == id) { + kref_get(&p->ref); + ret_p = p; + break; + } + } + + srcu_read_unlock(&kfd_processes_srcu, idx); + + return ret_p; +} + /* kfd_process_evict_queues - Evict all user queues of a process * * Eviction is reference-counted per process-device. This means multiple -- 2.51.0