drm/amdkfd: Validate user queue svm memory residency

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Queue CWSR area maybe registered to GPU as svm memory, create queue to
ensure svm mapped to GPU with KFD_IOCTL_SVM_FLAG_GPU_ALWAYS_MAPPED flag.

Add queue_refcount to struct svm_range, to track queue CWSR area usage.

Because unmap mmu notifier callback return value is ignored, if
application unmap the CWSR area while queue is active, pr_warn message
in dmesg log. To be safe, evict user queue.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Philip Yang 2024-06-20 12:44:57 -04:00 • committed by Alex Deucher

parent bd4bea5ab2

commit b049504e21

3 changed files with 122 additions and 1 deletions

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110

drivers/gpu/drm/amd/amdkfd/kfd_queue.c

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12

drivers/gpu/drm/amd/amdkfd/kfd_svm.c

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1

drivers/gpu/drm/amd/amdkfd/kfd_svm.h

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