WSL2 下无法直通 AMD Radeon RX 7800 XT (RDNA3)，`lspci` 无输出，`/dev/dri` 不存在。

[lin636]

Windows Version

Windows 11 版本 10.0.26200.8037

WSL Version

WSL 2.6.3 + Ubuntu 24.04

Are you using WSL 1 or WSL 2?

• WSL 2
• WSL 1

Kernel Version

6.6.87.2-1

Distro Version

Ubuntu 24.04.4 LTS

Other Software

No response

Repro Steps

1. 全新安装 Windows 11 版本 26200.8037，开启 Hyper-V 和虚拟机平台。
2. 在 BIOS 中启用 SVM、IOMMU、Above 4G Decoding、ReBAR。
3. 安装 AMD Adrenalin 26.2.2 驱动（非 AI 捆绑包）。
4. 安装 WSL 2.6.3，设置 WSL 2 为默认版本。
5. 安装 Ubuntu 24.04：
   wsl --install -d Ubuntu-24.04
6. 在 Ubuntu 中安装 ROCm 7.2（WSL 专用模式）：
   wget https://repo.radeon.com/amdgpu-install/7.2/ubuntu/noble/amdgpu-install_7.2.70200-1_all.deb
   sudo apt install ./amdgpu-install_7.2.70200-1_all.deb
   sudo amdgpu-install --usecase=wsl,rocm --no-dkms
7. 重启 WSL（wsl --shutdown）后重新进入 Ubuntu。
8. 执行：
   lspci | grep -i vga
   ls /dev/dri/
   sudo dmesg | grep -i dxg
   rocminfo

Expected Behavior

• lspci | grep VGA 应该显示 AMD Radeon RX 7800 XT
• /dev/dri 目录应当存在，且包含 card0、renderD128
• rocminfo 正常输出 GPU 信息，不崩溃
• python3 -c "import torch; print(torch.cuda.is_available())" 输出 True

Actual Behavior

• lspci | grep VGA 无任何输出
• /dev/dri 目录不存在
• dmesg 显示错误：
  PCI: System does not support PCI
  misc dxg: dxgkio_query_adapter_info: Ioctl failed: -22
  misc dxg: dxgkio_query_adapter_info: Ioctl failed: -2

text

• rocminfo 崩溃并报错：
  Assertion \props.EngineId.ui32.Major && "HSA_OVERRIDE_GFX_VERSION may be needed"' failed.`
• python3 -c "import torch; print(torch.cuda.is_available())" 输出 False

Diagnostic Logs

Windows 版本：
cmd /c ver
Microsoft Windows [版本 10.0.26200.8037]

WSL 版本：
wsl --version
WSL 版本： 2.6.3.0
内核版本： 6.6.87.2-1
WSLg 版本： 1.0.66
MSRDC 版本： 1.2.5716
Direct3D 版本： 1.611.1-81528511
DXCore 版本： 10.0.26100.1-240331-1655.ge-release
Windows 版本： 10.0.26200.8037

Ubuntu 版本：
lsb_release -a
Distributor ID: Ubuntu
Description: Ubuntu 24.04.4 LTS
Release: 24.04
Codename: noble

ROCm 安装方式：
sudo amdgpu-install --usecase=wsl,rocm --no-dkms

dmesg 完整错误：
[ 0.588472] PCI: System does not support PCI
[ 0.868579] AMD-Vi: AMD IOMMUv2 functionality not available on this system
[ 2.320100] misc dxg: dxgkio_query_adapter_info: Ioctl failed: -22
[ 2.324405] misc dxg: dxgkio_query_adapter_info: Ioctl failed: -2

环境变量已设置：
echo $HSA_OVERRIDE_GFX_VERSION
11.0.0

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[lin636]

新建 文本文档 (3).txt

[Rukkhadevata123]

wsl的显卡直通不是pci passthrough的形式，原理应该是GPU半虚拟化，要看/dev/dxg，lspci和/dev/dri没有是正常的，直接看rocminfo即可（我这里是/usr/lib/wsl/lib/nvidia-smi，正常