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ROCm / ROCK-Kernel-Driver

AMDGPU Driver with KFD used by the ROCm project. Also contains the current Linux Kernel that matches this base driver
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Obtain the physical address when allocating via `hipMalloc` #158

Closed xuantengh closed 2 months ago

xuantengh commented 10 months ago

Description

I'm conducting a research problem about AMD GPU memory management, including a step to obtain the physical address of the user space pointer returned by hipMalloc. I find that this process is executed by the ioctl with AMDKFD_IOC_ALLOC_MEMORY_OF_GPU as the argument and finally goes to amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu.

So I'm wondering is there any approach to obtain the physical address during this process, if so, which interface or data structure should I look for. Thanks in advance.

Operating System

Ubuntu 22.04

GPU

MI100

ROCm Component

No response

ppanchad-amd commented 3 months ago

@xuantengh Internal ticket is created to assist with your issue. Thanks!

alexxu-amd commented 2 months ago

Hi @xuantengh, Exposing the physical address can potentially lead to security concerns. So unfortunately, it is not a supported feature.