iPad 首次运行未修改 Linux amdgpu 驱动：LemonSeed Studio 实现 AMD GPU 端侧 LLM 推理

原标题：Running the unmodified Linux amdgpu driver on an iPad

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核心综述

LemonSeed Studio 在 iPad 上成功嵌入未经修改的 Linux amdgpu/amdkfd 驱动，通过 PCIDriverKit 扩展直接控制雷电接口的 AMD GPU。该方案利用 HSA runtime 和 HRX/Loom 引擎实现了真正的端侧大模型推理，突破了苹果生态对非 M 系列 GPU 的支持限制。

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LemonSeed Studio

An editor and IDE for iPad with on-device LLM inference on an AMD GPU.

LemonSeed Studio is a single iPad app. It bundles:

mac_linuxgpu: the unmodified upstream Linux amdgpu + amdkfd driver, embedded in the app as a PCIDriverKit extension. It drives an AMD GPU in a Thunderbolt enclosure.
LemonSeed Engine: the inference engine, running on that GPU through its HSA runtime and HRX/Loom.
amdgpu_mtopg: live GPU telemetry.

Layout

文本

third_party/mac_linuxgpu   GPU driver (submodule)
third_party/LSE            inference engine (submodule)
third_party/amdgpu_mtopg   GPU monitor (submodule)

Getting the source

git clone --recurse-submodules <repository>

Or, in an existing clone:

git submodule update --init

mac_linuxgpu fetches its own pinned Linux sources sparsely on first build, so its nested kernel submodule does not need to be cloned recursively.