Re: USB passthrough in QEMU

[Vitaly Shevtsov <shev.vt1984%gmail.com@localhost>]

I'm sorry, but it still doesn't work :)

Do you run QEMU as root to be able to pass USB devices or as a non-root user?

I use the following to run VM in QEMU:
qemu-system-x86_64 -m 4G -cpu host -smp 4 -M q35 -accel nvmm -usb
-device usb-host -drive file=vm.qcow2 -nic user,model=e1000 -rtc
base=localtime
And I get the this error:
qemu-system-x86_64: libusb_kernel_driver_active: -12 [NOT_SUPPORTED]

Whichever bus/port I try, it always ends up with this error? What did I miss?

On Tue, Mar 25, 2025 at 12:37 AM Vitaly Shevtsov <shev.vt1984%gmail.com@localhost> wrote:
>
> This is what I was looking for.
>
> Thanks! :)
>
> On Tue, Mar 25, 2025 at 12:32 AM Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:
> >
> > On Mon, Mar 24, 2025 at 11:59:00PM +0500, Vitaly Shevtsov wrote:
> > > Hello!
> > >
> > > Was anyone able to pass through a USB device in QEMU? When I try using
> > > `-usb -device usb-host`, I get the following error:
> > > qemu-system-x86_64: libusb_kernel_driver_active: -12 [NOT_SUPPORTED]
> > >
> > > Is it even supported?
> >
> > See https://mail-index.netbsd.org/tech-kern/2025/02/25/msg030094.html
> >
> > with some kernel hacking I've got the control endpoint to work in the
> > guest, but any bulk transfert would hang qemu
> >
> > --
> > Manuel Bouyer <bouyer%antioche.eu.org@localhost>
> >      NetBSD: 26 ans d'experience feront toujours la difference
> > --