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Guest kernel config (
kernel/config-arm64)USBPassthroughgives the VM an emulated XHCI controller, which Linux can't see without these options:CONFIG_USB_SUPPORT,CONFIG_USB- USB coreCONFIG_USB_PCI- Finds USB host controllers on the PCI busCONFIG_USB_XHCI_HCD- XHCI (USB 3) host controller driverCONFIG_USB_XHCI_PCI- Binds the xHCI driver to PCI xHCI controllersCONFIG_USB_ACM- CDC-ACM class driver (/dev/ttyACM*)USBPassthroughgives the VM an emulated xHCI controller, which Virtualization.framework exposes as a PCI device. The guest needs the USB core (CONFIG_USB_SUPPORT,CONFIG_USB), PCI discovery of USB controllers (CONFIG_USB_PCI), and the xHCI driver with its PCI binding (CONFIG_USB_XHCI_HCD,CONFIG_USB_XHCI_PCI) to find it and show passed-through devices under/dev/bus/usb.CONFIG_USB_ACMisn't needed for passthrough. It adds serial access to CDC-ACM devices such as official Arduino boards. Other device classes stay disabled in these changes to keep the kernel small(er)Entitlements
USB passthrough requires the
com.apple.developer.accessory-access.usbentitlement. There is no one place in this repo to document entitlements, but this in included in inline doc comments.