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Device pass-through

PCI and USB pass-through is supported on some hypervisors. Permission setup is automatic for declared "pci' devices, but manual for "usb" devices.

Example PCI pass-through

Guest example:

microvm.devices = [ {
  bus = "pci";
  path = "0000:06:00.1";
} {
  bus = "pci";
  path = "0000:06:10.4";
} ];

Permission setup on the host is provided by systemd template unit [email protected].

Example USB pass-through

In the guest

microvm.devices = [
  # RTL2838UHIDIR
  # Realtek Semiconductor Corp. RTL2838 DVB-T
  { bus = "usb"; path = "vendorid=0x0bda,productid=0x2838"; }
  # Sonoff Zigbee 3.0 USB Dongle Plus
  # Silicon Labs CP210x UART Bridge
  { bus = "usb"; path = "vendorid=0x10c4,productid=0xea60"; }
];

On the host

USB device paths are not directly translatable to udev rules. Setup permissions yourself:

services.udev.extraRules = ''
  # RTL2838UHIDIR
  # Realtek Semiconductor Corp. RTL2838 DVB-T
  SUBSYSTEM=="usb", ATTR{idVendor}=="0bda", ATTR{idProduct}=="2838", GROUP="kvm"
  # Sonoff Zigbee 3.0 USB Dongle Plus
  # Silicon Labs CP210x UART Bridge
  SUBSYSTEM=="usb", ATTR{idVendor}=="10c4", ATTR{idProduct}=="ea60", GROUP="kvm"
'';