CONFIG_HSA_AMD_P2P: HSA kernel driver support for peer-to-peer for AMD GPU devices

General informations

The Linux kernel configuration item CONFIG_HSA_AMD_P2P:

• prompt: HSA kernel driver support for peer-to-peer for AMD GPU devices
• type: bool
• depends on: CONFIG_HSA_AMD && CONFIG_PCI_P2PDMA && CONFIG_DMABUF_MOVE_NOTIFY
• defined in drivers/gpu/drm/amd/amdkfd/Kconfig
• found in Linux kernels: 6.0–6.8, 6.9-rc+HEAD

Help text

Enable peer-to-peer (P2P) communication between AMD GPUs over the PCIe bus. This can improve performance of multi-GPU compute applications and libraries by enabling GPUs to access data directly in peer GPUs' memory without intermediate copies in system memory.

This P2P feature is only enabled on compatible chipsets, and between GPUs with large memory BARs that expose the entire VRAM in PCIe bus address space within the physical address limits of the GPUs.

Hardware

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The data is retrived from:

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• Linux Kernel Driver DataBase (LKDDb)

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