USB pass through in QEMU command line for ARM machines

Hi All,

I want boot the QEMU ARM machine with USB emulation, initially i launched the QEMU ARM machine but i cant able to see the usb devices using lsusb command.

so thought to pass the Host USB to QEMU for that i passed the below configuration to QEMU command line

-usb -device usb-host, vendorid<xxxxx>, productid<xxxxx>

then when i launch the QEMU am facing the below problem

"No usb bus found for usb-devices".

How to identify the bus for usb-host to pass through.

Any help would be appreciated.

Thanks,

Srinuvasan.A

Hi,

Thanks for the reference, Only ARM i can able to see the "No usb bus found for usb-devices" error when we pass through the USB to QEMU.

the same " -usb -device usb-host, vendorid<xxxxx>, productid<xxxxx>" command working fine for QEMU amd64 machines, here am not facing any bus issue

Any idea?

And one more thing when we boot QEMU amd64 i can able to see the USB controller register information

[ 0.828829] sky2: driver version 1.30
[ 0.829216] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.829743] ehci-pci: EHCI PCI platform driver
[ 0.830536] ehci-pci 0000:00:1d.7: EHCI Host Controller
[ 0.830997] ehci-pci 0000:00:1d.7: new USB bus registered, assigned bus number 1
[ 0.831700] ehci-pci 0000:00:1d.7: irq 19, io mem 0xfebd2000
[ 0.838488] ehci-pci 0000:00:1d.7: USB 2.0 started, EHCI 1.00
[ 0.838958] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 4.19
[ 0.839616] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.840175] usb usb1: Product: EHCI Host Controller
[ 0.840600] usb usb1: Manufacturer: Linux 4.19.124-cip27 ehci_hcd
[ 0.841071] usb usb1: SerialNumber: 0000:00:1d.7

But when we boot QEMU ARM am not able to see the USB controller registration

[ 1.747101] CAN device driver interface
[ 1.750460] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.750689] ehci-pci: EHCI PCI platform driver
[ 1.751014] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.751235] ohci-pci: OHCI PCI platform driver
[ 1.751493] uhci_hcd: USB Universal Host Controller Interface driver
[ 1.751859] usbcore: registered new interface driver usblp
[ 1.752131] usbcore: registered new interface driver usb-storage
[ 1.753986] mousedev: PS/2 mouse device common for all mice
[ 1.754694] i2c /dev entries driver
[ 1.757415] device-mapper: ioctl: 4.39.0-ioctl (2018-04-03) initialised: dm-devel@redhat.com
[ 1.758167] Synopsys Designware Multimedia Card Interface Driver

Please provide your thoughts if any?

Thnaks,

Srinuvasan.A

USB pass through in QEMU command line for ARM machines

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