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amdkfd: process USERPTR allocation only on the primary kfd process

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The lifecycle of the primary kfd process is tied to
the user space program, all secondary kfd process
would be destroyed when fd close. Thus only the primary
kfd process should process USERPTR memory allocation.

Signed-off-by: Zhu Lingshan <lingshan.zhu@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Zhu Lingshan
2025-06-30 11:00:29 +08:00
committed by Alex Deucher
parent 26fc46d794
commit 1707d5760c
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
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@@ -1062,6 +1062,12 @@ static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep,
if (args->size == 0)
return -EINVAL;
if (p->context_id != KFD_CONTEXT_ID_PRIMARY && (flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR)) {
pr_debug("USERPTR is not supported on non-primary kfd_process\n");
return -EOPNOTSUPP;
}
#if IS_ENABLED(CONFIG_HSA_AMD_SVM)
/* Flush pending deferred work to avoid racing with deferred actions
* from previous memory map changes (e.g. munmap).