qemu-system-aarch64 -device help

执行命令：
# /usr/libexec/qemu-kvm -device help
USB devices:
name "ich9-usb-ehci1", bus PCI
name "ich9-usb-ehci2", bus PCI
name "ich9-usb-uhci1", bus PCI
name "ich9-usb-uhci2", bus PCI
name "ich9-usb-uhci3", bus PCI
name "ich9-usb-uhci4", bus PCI
name "ich9-usb-uhci5", bus PCI
name "ich9-usb-uhci6", bus PCI
name "nec-usb-xhci", bus PCI   //有这个表示支持USB3.0的重定向
name "piix3-usb-uhci", bus PCI
name "piix4-usb-uhci", bus PCI
name "usb-ehci", bus PCI
name "vt82c686b-usb-uhci", bus PCI

qemu-system-aarch64 -device help | grep usb
name "usb-host", bus usb-bus
name "usb-hub", bus usb-bus
name "ich9-usb-ehci1", bus PCI
name "ich9-usb-ehci2", bus PCI
name "ich9-usb-uhci1", bus PCI
name "ich9-usb-uhci2", bus PCI
name "ich9-usb-uhci3", bus PCI
name "ich9-usb-uhci4", bus PCI
name "ich9-usb-uhci5", bus PCI
name "ich9-usb-uhci6", bus PCI
name "nec-usb-xhci", bus PCI
name "piix3-usb-uhci", bus PCI
name "piix4-usb-uhci", bus PCI
name "usb-ehci", bus PCI
name "vt82c686b-usb-uhci", bus PCI
name "usb-bot", bus usb-bus
name "usb-mtp", bus usb-bus, desc "USB Media Transfer Protocol device"
name "usb-storage", bus usb-bus
name "usb-uas", bus usb-bus
name "usb-net", bus usb-bus
name "usb-braille", bus usb-bus
name "usb-ccid", bus usb-bus, desc "CCID Rev 1.1 smartcard reader"
name "usb-kbd", bus usb-bus
name "usb-mouse", bus usb-bus
name "usb-serial", bus usb-bus
name "usb-tablet", bus usb-bus
name "usb-wacom-tablet", bus usb-bus, desc "QEMU PenPartner Tablet"
name "usb-audio", bus usb-bus
name "u2f-passthru", bus usb-bus, desc "QEMU U2F passthrough key"

qemu-system-aarch64 -device nec-usb-xhci,help
nec-usb-xhci options:
  addr=<int32>           - Slot and optional function number, example: 06.0 or 06 (default: -1)
  failover_pair_id=<str>
  force-pcie-endcap=<bool> - on/off (default: false)
  host=<link<device>>
  intrs=<uint32>         -  (default: 16)
  msi=<OnOffAuto>        - on/off/auto (default: "auto")
  msix=<OnOffAuto>       - on/off/auto (default: "auto")
  multifunction=<bool>   - on/off (default: false)
  p2=<uint32>            -  (default: 4)
  p3=<uint32>            -  (default: 4)
  rombar=<uint32>        -  (default: 1)
  romfile=<str>
  slots=<uint32>         -  (default: 64)
  streams=<bool>         - on/off (default: true)
  superspeed-ports-first=<bool> - on/off (default: true)
  x-pcie-extcap-init=<bool> - on/off (default: true)
  x-pcie-lnksta-dllla=<bool> - on/off (default: true)
  xhci-core=<child<base-xhci>>