USB and Windows guests

USB and Windows guests

[ckonstanski]

Using app-emulation/qemu-2.0.0 from Gentoo portage. I'm a little fuzzy 
on whether qemu and kvm are the same thing. If they're not, kindly 
inform me and I'll be on my way. Also I don't know if this list is 
strictly for kernelspace issues or if userspace may also be discussed. 
And I can't be sure where my issue lies anyway, though on the surface it 
seems like a kernel issue.

I'm trying to connect a Galaxy Note 3 phone to a Windows guest. Having 
an issue with the USB device moving around. For instance:

1. I plug in the phone and do an lsusb:
Bus 003 Device 03: ID 04e8:6860 Samsung Electronics Co., Ltd GT-I9100 
Phone [Galaxy S II], GT-I9300 Phone [Galaxy S III], GT-P7500 [Galaxy Tab 
10.1] , GT-I9500 [Galaxy S 4]

2. I create the proper configuration in my qemu command line:
-usb -device usb-host,hostbus=3,hostaddr=3

(for completeness, the entire command line:)
sudo qemu-system-x86_64 -enable-kvm -name hly-ckonstan07 -k de -vga 
vmware -soundhw ac97 -usb -device usb-host,hostbus=3,hostaddr=4 -display 
vnc=:1 -nographic -balloon virtio -net 
tap,ifname=tap1,script=no,downscript=no -net 
nic,model=virtio,macaddr=44:44:44:44:44:04 -localtime -drive 
file="/home/ckonstanski/kvm/hly-ckonstan07/hly-ckonstan07.qcow2",if=virtio 
-boot order=c -m 2048 -cpu host -smp 
cpus=2,maxcpus=2,cores=2,threads=1,sockets=2 &

3. I start the guest by running the above command.

When I start the VM, the USB jumps to another hostaddr, and it is not 
available to the guest.

This does not happen with my old Droid4 phone, nor with my USB foot 
pedal. It seems to plague my Galaxy Note 3 only.

I have a udev rule for the phone in 51-android.rules, and USB debugging 
is turned on in the phone.

 From what docs I could find, it seems that there are several ways to 
configure a USB passthrough, but this is the only one that works with 
Windows guests. If there are other options, I'm all ears.

Thanks,
Carlos Konstanski

Re: USB and Windows guests

[Gerd Hoffmann]

> 1. I plug in the phone and do an lsusb:
> Bus 003 Device 03: ID 04e8:6860 Samsung Electronics Co., Ltd GT-I9100 
> Phone [Galaxy S II], GT-I9300 Phone [Galaxy S III], GT-P7500 [Galaxy Tab 
> 10.1] , GT-I9500 [Galaxy S 4]

> 2. I create the proper configuration in my qemu command line:
> -usb -device usb-host,hostbus=3,hostaddr=3

> When I start the VM, the USB jumps to another hostaddr, and it is not 
> available to the guest.

Probably the phone disconnects, then re-appears with a different
configuration.  Using hostport=... instead of hostaddr should fix it.

cheers,
  Gerd