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I have the following on the host machine

$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

I would like second in a line device to be passed through to the machine.

Also

$ lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
    |__ Port 3: Dev 3, If 0, Class=Vendor Specific Class, Driver=ftdi_sio, 12M

What should I write in qemu command line? I wrote

-usb -hostbus=1 -hostport=3

and in failed to run with

qemu-system-arm: -hostbus=1: invalid option

I wrote

-usb \
-device usb-host,hostbus=1,hostport=3 \

And got

libusb: error [_get_usbfs_fd] libusb couldn't open USB device /dev/bus/usb/001/003: Permission denied
libusb: error [_get_usbfs_fd] libusb requires write access to USB device nodes.
libusb: error [_get_usbfs_fd] libusb couldn't open USB device /dev/bus/usb/001/003: Permission denied
libusb: error [_get_usbfs_fd] libusb requires write access to USB device nodes.

errors during boot under conventional used. If ran under sudo I got no errors, but also got no USB working under quest.

# lsusb
unable to initialize libusb: -99

Full command line

sudo qemu-system-arm \
    -kernel kernel-qemu-4.4.34-jessie \
    -cpu arm1176 -m 256 -M versatilepb \
    -serial stdio \
    -append "root=/dev/sda2 rootfstype=ext4 rw" \
    -hda myimage.img \
    -usb \
    -device usb-host,hostbus=1,hostport=3 \
    -redir tcp:5022::22 \
    -redir tcp:5080::80 \
    -no-reboot 

I have recompiled QEMU with

./configure --enable-libusb

but this didn't help. lsusb still gives an error. Also no rows about usb in dmesg. On real raspberri pi there are many usb rows including dwc_otg.

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  • Partially. It doesn't work at least.
    – Dims
    Sep 22, 2020 at 10:20
  • Now you have access errors which could be solved by using udev rules or by simply chown'ing files. Again, try googling first. You seem to be averse to finding answers on your own. Sep 22, 2020 at 10:34
  • @ArtemS.Tashkinov the same image works normally under RaspberryPi why would I?
    – Dims
    Sep 22, 2020 at 10:51
  • I don't know what "the same image" is and also I'm not sure you run qemu the same way on both systems. sudo will work for you 100%. Sep 22, 2020 at 12:31
  • @ArtemS.Tashkinov tried sudo, see section "full command line"
    – Dims
    Sep 22, 2020 at 13:18

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