Re: boot from usb-host device

[Thomas Huth]

On 10/08/2023 09.30, José Ramón Muñoz Pekkarinen wrote:
>      Hi,
>
>      I'm testing to boot a virtual machine from an
> usb device on the host using usb-host device.
> The bios seems not to find the usb device and
> try alternatives methods to boot until all fail. Setting
> -boot menu=on, the available options doesn't list
> any usb drive. Is this somehow possible or am I
> doing something terribly wrong? The virtual machine
> command line follows:
>
> /usr/bin/qemu-system-x86_64 -enable-kvm -M q35 \
>         -vga none -display gtk,gl=on -cpu host -smp 8,cores=8,threads=1 \
>         -m 4G -mem-path /dev/hugepages -L /usr/share/qemu -full-screen \
>         -global ICH9-LPC.disable_s3=1 -global ICH9-LPC.disable_s4=1 \
>         -device virtio-vga-gl \
>         -device qemu-xhci,id=xhci -device usb-tablet \
>         -device usb-host,vendorid=0x20a0,productid=0x4109 \
>         -device usb-host,vendorid=0x1050,productid=0x0407 \
>         -netdev user,id=user.0 -device virtio-net-pci,netdev=user.0 \
>         -device virtio-serial \
>         -chardev
> socket,path=/tmp/tails-virtio-serial,server=on,wait=off,id=tails-virtio-serial
> \
>         -device 
> virtserialport,chardev=tails-virtio-serial,name=org.qemu.guest_agent.0
>
>      The device to boot is the usb-host 20a0:4109.
>
>      Thanks!

I've never tried, but you should maybe add a bootindex to the device that 
you want to boot from:

 -device usb-host,vendorid=0x20a0,productid=0x4109,bootindex=1

 HTH,
  Thomas