[Qemu-devel] git master: usb-host needs additional parameters - no documentation which

[Qemu-devel] git master: usb-host needs additional parameters - no documentation which

[Erik Rull]

Hi all,

when using the latest GIT master qemu fails with the following error:
qemu-system-x86_64: -device usb-host,bus=ehci.0: Parameter 'driver' expects
device type

I haven't changed anything in the call parameters since 1.2.0 and the
documentation that is provided in the GIT repository doesn't show any mistakes
to me. Btw. the "bus" parameter is still missing there.

If there is a new way of routing usb devices to the guest, I would like to get
the information how to do that.

Thanks.

Best regards,

Erik

Re: [Qemu-devel] git master: usb-host needs additional parameters - no documentation which

[Gerd Hoffmann]

On Di, 2013-11-26 at 15:52 +0100, Erik Rull wrote:
> Hi all,
> 
> when using the latest GIT master qemu fails with the following error:
> qemu-system-x86_64: -device usb-host,bus=ehci.0: Parameter 'driver' expects
> device type

Any chance you don't have libusbx-devel installed and qemu is therefore
built without usb-host support?

cheers,
  Gerd

Re: [Qemu-devel] git master: usb-host needs additional parameters - no documentation which

[Erik Rull]

Hi Gerd,

I only have libusb (0.1 and 1.0) installed. Is there a chance to get an 
error message a bit earlier - or a warning that the usb-host support was 
disabled? configure doesn't print out a libusb - disabled message when not 
passing the libusb-parameter.

I tried now explicitly with --enable-libusb - fails :-(
I would like to point to a different version of libusb - my built machine 
has the sources for the latest libusb but not in the location where it is 
expected for a standard distribution...
My target system has this library available but there I can't compile, so 
qemu should run there.

I'm really interested getting qemu running again, but I'm running from 
trouble to trouble now for more than 4 weeks - python, ACPI, USB,...

Thanks.

Best regards,

Erik




Gerd Hoffmann wrote:
> On Di, 2013-11-26 at 15:52 +0100, Erik Rull wrote:
>> Hi all,
>>
>> when using the latest GIT master qemu fails with the following error:
>> qemu-system-x86_64: -device usb-host,bus=ehci.0: Parameter 'driver' expects
>> device type
>
> Any chance you don't have libusbx-devel installed and qemu is therefore
> built without usb-host support?
>
> cheers,
>    Gerd
>
>

Re: [Qemu-devel] git master: usb-host needs additional parameters - no documentation which

[Erik Rull]

Erik Rull wrote:
> Hi Gerd,
>
> I only have libusb (0.1 and 1.0) installed. Is there a chance to get an
> error message a bit earlier - or a warning that the usb-host support was
> disabled? configure doesn't print out a libusb - disabled message when not
> passing the libusb-parameter.
>
> I tried now explicitly with --enable-libusb - fails :-(
> I would like to point to a different version of libusb - my built machine
> has the sources for the latest libusb but not in the location where it is
> expected for a standard distribution...
> My target system has this library available but there I can't compile, so
> qemu should run there.
>
> I'm really interested getting qemu running again, but I'm running from
> trouble to trouble now for more than 4 weeks - python, ACPI, USB,...
>
> Thanks.
>
> Best regards,
>
> Erik
>
>
>
>
> Gerd Hoffmann wrote:
>> On Di, 2013-11-26 at 15:52 +0100, Erik Rull wrote:
>>> Hi all,
>>>
>>> when using the latest GIT master qemu fails with the following error:
>>> qemu-system-x86_64: -device usb-host,bus=ehci.0: Parameter 'driver' expects
>>> device type
>>
>> Any chance you don't have libusbx-devel installed and qemu is therefore
>> built without usb-host support?
>>
>> cheers,
>>    Gerd
>>
>>
>
>

Just a thought:
Snippet from configure:

         libusb_cflags=$($pkg_config --cflags libusb-1.0)
         libusb_libs=$($pkg_config --libs libusb-1.0)
         QEMU_CFLAGS="$QEMU_CFLAGS $libusb_cflags"
         libs_softmmu="$libs_softmmu $libusb_libs"

Is it possible to expose the two libusb_ variables to a 
configure-parameter? This would be sufficient for me to compile qemu with 
the parameters I need. I don't have the package installed but the includes 
and libs are present on the build machine and the lib is available on the 
target machine.

Best regards,

Erik

Re: [Qemu-devel] git master: usb-host needs additional parameters - no documentation which

[Paolo Bonzini]

Il 26/11/2013 18:29, Erik Rull ha scritto:
> 
> Just a thought:
> Snippet from configure:
> 
>         libusb_cflags=$($pkg_config --cflags libusb-1.0)
>         libusb_libs=$($pkg_config --libs libusb-1.0)
>         QEMU_CFLAGS="$QEMU_CFLAGS $libusb_cflags"
>         libs_softmmu="$libs_softmmu $libusb_libs"
> 
> Is it possible to expose the two libusb_ variables to a
> configure-parameter? This would be sufficient for me to compile qemu
> with the parameters I need. I don't have the package installed but the
> includes and libs are present on the build machine and the lib is
> available on the target machine.

Note that configure does have this:

echo "libusb            $libusb"

It seems strange to me that you have includes and libs but no .pc file.
 Perhaps the pkg-config path (PKG_CONFIG_PATH) is not set correctly?

Note that in the meanwhile you can use "-device usb-host-linux", I think.

Paolo

Re: [Qemu-devel] git master: usb-host needs additional parameters - no documentation which

[Gerd Hoffmann]

On Di, 2013-11-26 at 17:44 +0100, Erik Rull wrote:
> Hi Gerd,
> 
> I only have libusb (0.1 and 1.0) installed. Is there a chance to get an 
> error message a bit earlier - or a warning that the usb-host support was 
> disabled? configure doesn't print out a libusb - disabled message when not 
> passing the libusb-parameter.

It lists libusb like everything else:

[ ... ]
xfsctl support    no
nss used          yes
libusb            yes      <====
usb net redir     yes
[ ... ]

> I tried now explicitly with --enable-libusb - fails :-(

Again standard configure behavior:  If you explicitly ask for a feature
and the dependencies are not found configure will error out (instead of
silently disabling the feature).

> I would like to point to a different version of libusb - my built machine 
> has the sources for the latest libusb but not in the location where it is 
> expected for a standard distribution...

pkg-config is used for detection, so if you set PKG_CONFIG_PATH to
include your custom location configure should find it.

HTH,
  Gerd

Re: [Qemu-devel] git master: usb-host needs additional parameters - no documentation which

[Gerd Hoffmann]

  Hi,

> Note that in the meanwhile you can use "-device usb-host-linux", I think.

That is true for 1.5 + 1.6, but in 1.7 the old non-libusb code is gone.

cheers,
  Gerd