Bluetooth support in QEMU

Bluetooth support in QEMU

[vaishu venkat]

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Hi team,
            We are currently required to use QEMU for virtualization of
customized application. The application requires Bluetooth and Wi-fi
support, as observed below warning,
*qemu-system-aarch64: -bt hci,host: warning: The bluetooth subsystem is
deprecated and will be removed soon. If the bluetooth subsystem is still
useful for you, please send a mail to qemu-devel@nongnu.org
<qemu-devel@nongnu.org> with your usecase.*

 Could you please help us with the support of bluetooth in QEMU.





Thanks in anticipation.
Regards,
Vaishnavi V

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Re: Bluetooth support in QEMU

[Peter Maydell]

On Mon, 15 Aug 2022 at 16:53, vaishu venkat <vaishu071998@gmail.com> wrote:
>
> Hi team,
>             We are currently required to use QEMU for virtualization of customized application. The application requires Bluetooth and Wi-fi support, as observed below warning,
> qemu-system-aarch64: -bt hci,host: warning: The bluetooth subsystem is deprecated and will be removed soon. If the bluetooth subsystem is still useful for you, please send a mail to qemu-devel@nongnu.org with your usecase.
>
>  Could you please help us with the support of bluetooth in QEMU.

You're rather late... Bluetooth was deprecated in 2018 for
QEMU v3.1 (hence that warning message), and was subsequently
removed entirely for QEMU v5.0, released in 2020.

The code in QEMU was, as far as we could tell at the time,
basically unused, unmaintained and also broken. It isn't
coming back, I'm afraid.

Do you have an existing application that runs and works with
the bluetooth functionality on the QEMU version you have,
or are you instead trying to get it working as a new thing?
If the former, the answer is "just keep using that old QEMU".
If the latter, the answer is "it never really worked anyway,
so don't bother trying".

thanks
-- PMM

Re: Bluetooth support in QEMU

[Thomas Huth]

On 15/08/2022 13.27, vaishu venkat wrote:
> Hi team,
>              We are currently required to use QEMU for virtualization of 
> customized application. The application requires Bluetooth and Wi-fi 
> support, as observed below warning,
> *qemu-system-aarch64: -bt hci,host: warning: The bluetooth subsystem is 
> deprecated and will be removed soon. If the bluetooth subsystem is still 
> useful for you, please send a mail to qemu-devel@nongnu.org 
> <mailto:qemu-devel@nongnu.org> with your usecase.*
> 
>   Could you please help us with the support of bluetooth in QEMU.

Which version of QEMU are you using? Bluetooth support has been completely 
removed in QEMU v5.0.0 (which was released more than two years ago already) 
since nobody spoke up saying that they were still using the completely 
bit-rotten code. So sorry, but it's gone now and cannot be used anymore in 
recent versions.

If you just need access to real bluetooth devices in the guest, you could 
try to passthrough a real bluetooth USB device to the guest instead.

  HTH,
   Thomas

Re: Bluetooth support in QEMU

[vaishu venkat]

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Hi Thomas,

Thanks for prompt response.

We currently using the QEMU version as below,



*qemu-system-aarch64 -versionQEMU emulator version 4.2.1 (Debian
1:4.2-3ubuntu6.23)Copyright (c) 2003-2019 Fabrice Bellard and the QEMU
Project developers*

Could you please guide us with the, how to access the real bluetooth
devices in the guest

On Mon, Aug 15, 2022 at 9:40 PM Thomas Huth <thuth@redhat.com> wrote:

> On 15/08/2022 13.27, vaishu venkat wrote:
> > Hi team,
> >              We are currently required to use QEMU for virtualization of
> > customized application. The application requires Bluetooth and Wi-fi
> > support, as observed below warning,
> > *qemu-system-aarch64: -bt hci,host: warning: The bluetooth subsystem is
> > deprecated and will be removed soon. If the bluetooth subsystem is still
> > useful for you, please send a mail to qemu-devel@nongnu.org
> > <mailto:qemu-devel@nongnu.org> with your usecase.*
> >
> >   Could you please help us with the support of bluetooth in QEMU.
>
> Which version of QEMU are you using? Bluetooth support has been completely
> removed in QEMU v5.0.0 (which was released more than two years ago
> already)
> since nobody spoke up saying that they were still using the completely
> bit-rotten code. So sorry, but it's gone now and cannot be used anymore in
> recent versions.
>
> If you just need access to real bluetooth devices in the guest, you could
> try to passthrough a real bluetooth USB device to the guest instead.
>
>   HTH,
>    Thomas
>
>

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Re: Bluetooth support in QEMU

[vaishu venkat]

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Hi Peter,

Thanks for quick reply.

We don't have an existing application running with qemu functionality.



On Mon, Aug 15, 2022 at 9:36 PM Peter Maydell <peter.maydell@linaro.org>
wrote:

> On Mon, 15 Aug 2022 at 16:53, vaishu venkat <vaishu071998@gmail.com>
> wrote:
> >
> > Hi team,
> >             We are currently required to use QEMU for virtualization of
> customized application. The application requires Bluetooth and Wi-fi
> support, as observed below warning,
> > qemu-system-aarch64: -bt hci,host: warning: The bluetooth subsystem is
> deprecated and will be removed soon. If the bluetooth subsystem is still
> useful for you, please send a mail to qemu-devel@nongnu.org with your
> usecase.
> >
> >  Could you please help us with the support of bluetooth in QEMU.
>
> You're rather late... Bluetooth was deprecated in 2018 for
> QEMU v3.1 (hence that warning message), and was subsequently
> removed entirely for QEMU v5.0, released in 2020.
>
> The code in QEMU was, as far as we could tell at the time,
> basically unused, unmaintained and also broken. It isn't
> coming back, I'm afraid.
>
> Do you have an existing application that runs and works with
> the bluetooth functionality on the QEMU version you have,
> or are you instead trying to get it working as a new thing?
> If the former, the answer is "just keep using that old QEMU".
> If the latter, the answer is "it never really worked anyway,
> so don't bother trying".
>
> thanks
> -- PMM
>

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Re: Bluetooth support in QEMU

[Thomas Huth]

On 16/08/2022 06.22, vaishu venkat wrote:
> Hi Thomas,
> 
> Thanks for prompt response.
> 
> We currently using the QEMU version as below,
> *
> *
> *qemu-system-aarch64 -version
> QEMU emulator version 4.2.1 (Debian 1:4.2-3ubuntu6.23)
> Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers*
> 
> Could you please guide us with the, how to access the real bluetooth devices 
> in the guest*

Simply search for "QEMU USB passthrough" with your favourite search engine, 
there are plenty of help pages out there.

  Thomas

Re: Bluetooth support in QEMU

[vaishu venkat]

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Thomas,

Sure will try with the USB Passthrough. Do you have any thoughts on
accessing the wireless interface inside the QEMU.

Thanks in Anticipation.




Regards,
Vaishnavi

On Tue, Aug 16, 2022 at 11:27 AM Thomas Huth <thuth@redhat.com> wrote:

> On 16/08/2022 06.22, vaishu venkat wrote:
> > Hi Thomas,
> >
> > Thanks for prompt response.
> >
> > We currently using the QEMU version as below,
> > *
> > *
> > *qemu-system-aarch64 -version
> > QEMU emulator version 4.2.1 (Debian 1:4.2-3ubuntu6.23)
> > Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers*
> >
> > Could you please guide us with the, how to access the real bluetooth
> devices
> > in the guest*
>
> Simply search for "QEMU USB passthrough" with your favourite search
> engine,
> there are plenty of help pages out there.
>
>   Thomas
>
>

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Re: Bluetooth support in QEMU

[vaishu venkat]

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Hi Team,

Could you have any thoughts or solutions for accessing the wireless adapter
interface inside the QEMU.


Thanks and regards,
Vaishnavi

On Tue, Aug 16, 2022 at 11:33 AM vaishu venkat <vaishu071998@gmail.com>
wrote:

> Thomas,
>
> Sure will try with the USB Passthrough. Do you have any thoughts on
> accessing the wireless interface inside the QEMU.
>
> Thanks in Anticipation.
>
>
>
>
> Regards,
> Vaishnavi
>
> On Tue, Aug 16, 2022 at 11:27 AM Thomas Huth <thuth@redhat.com> wrote:
>
>> On 16/08/2022 06.22, vaishu venkat wrote:
>> > Hi Thomas,
>> >
>> > Thanks for prompt response.
>> >
>> > We currently using the QEMU version as below,
>> > *
>> > *
>> > *qemu-system-aarch64 -version
>> > QEMU emulator version 4.2.1 (Debian 1:4.2-3ubuntu6.23)
>> > Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers*
>> >
>> > Could you please guide us with the, how to access the real bluetooth
>> devices
>> > in the guest*
>>
>> Simply search for "QEMU USB passthrough" with your favourite search
>> engine,
>> there are plenty of help pages out there.
>>
>>   Thomas
>>
>>

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