Add support for creating PCIe root ports in QEMU#442
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astro merged 1 commit intomicrovm-nix:mainfrom Dec 10, 2025
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astro
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Can you rebase on master to fix the eval/CI? |
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Sure, all green now. |
SuperSandro2000
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Dec 10, 2025
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This change adds the ability to define PCIe root ports for QEMU virtual machines. These ports can be used for device hot-plugging, allowing vfio-pci devices to be attached dynamically.
In the current version, it's possible to create ports via extraArgs and set them in deviceExtraArgs but with recent changes (#437), this approach produces "bus not found" errors. There is likely a race condition between creating vfio-pci devices which are now placed at the beginning of the QEMU command and the PCIe ports that were appended at the end.
With this change, PCIe root ports are explicitly created before the vfio-pci devices that may use them.