USB Passthrough support X86_64

USB Passthrough support X86_64

[Ajmal M Ali]

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Hi,

I am trying to do USB passthrough in x86_64. I have Ubuntu as Dom0 and DomU.



*Dom0 : Linux teltvm0881 4.8.0-58-generic #63~16.04.1-Ubuntu SMP Mon Jun 26
18:08:51 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux*

*DomU : Linux xen-guest-pv 4.12.0-custom #4 SMP Tue Jul 11 17:14:53 IST
2017 x86_64 GNU/Linux*



I had earlier, rebuild the kernel from kernel.orgto add PCI passthrough
support which was successful.

But when i try to do USB passthrough, as given in,

https://wiki.xenproject.org/wiki/Xen_USB_Passthrough

it dont work.ie.



*# xl usbctrl-attach xen-guest-pv version=1 ports=8*

*libxl: error: libxl_dm.c:2423:libxl__dm_check_start: device model required
but not running*

*libxl: error: libxl.c:2012:device_addrm_aocomplete: unable to add device*

*libxl_device_usbctrl_add failed.*



Why is this?

i am trying to hotplug my usb. I haveint made any changes in the config
file, as i assumed it wont be needed for hotplug, also i didnt have to do
it for pci passthrough. Should i?

Also, i cannot find any usbback and frond in my PC.



*# lsmod | grep pci*

*xen_pciback 61440 0*

*but,*

*# lsmod | grep usb*



back driver is not displayed. I tried to rebuild the kernel but I cannot
find any configuration regarding usb in my kernel configuration.

Is the usb passthrough support merged with the latest stable kernel in
kernel.org?

If yes, What all configuration should I enable in my config?



Regards,

Ajeesh

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Re: USB Passthrough support X86_64

[Wei Liu]

CC Juergen and George

On Thu, Jul 20, 2017 at 01:05:20PM +0530, Ajmal M Ali wrote:
> Hi,
> 
> I am trying to do USB passthrough in x86_64. I have Ubuntu as Dom0 and DomU.
> 
> 
> 
> *Dom0 : Linux teltvm0881 4.8.0-58-generic #63~16.04.1-Ubuntu SMP Mon Jun 26
> 18:08:51 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux*
> 
> *DomU : Linux xen-guest-pv 4.12.0-custom #4 SMP Tue Jul 11 17:14:53 IST
> 2017 x86_64 GNU/Linux*
> 
> 
> 
> I had earlier, rebuild the kernel from kernel.orgto add PCI passthrough
> support which was successful.
> 
> But when i try to do USB passthrough, as given in,
> 
> https://wiki.xenproject.org/wiki/Xen_USB_Passthrough
> 
> it dont work.ie.
> 
> 
> 
> *# xl usbctrl-attach xen-guest-pv version=1 ports=8*
> 
> *libxl: error: libxl_dm.c:2423:libxl__dm_check_start: device model required
> but not running*
> 
> *libxl: error: libxl.c:2012:device_addrm_aocomplete: unable to add device*
> 
> *libxl_device_usbctrl_add failed.*
> 
> 
> 
> Why is this?

USB passthrough requires the device model. There is currently no
provision in toolstack to spawn a device model on demand.

The easiest workaround is to add one device (vfb?) that would require
spawning a device model when creating the domain.

> 
> i am trying to hotplug my usb. I haveint made any changes in the config
> file, as i assumed it wont be needed for hotplug, also i didnt have to do
> it for pci passthrough. Should i?
> 
> Also, i cannot find any usbback and frond in my PC.
> 
> 
> 
> *# lsmod | grep pci*
> 
> *xen_pciback 61440 0*
> 
> *but,*
> 
> *# lsmod | grep usb*
> 
> 
> 
> back driver is not displayed. I tried to rebuild the kernel but I cannot
> find any configuration regarding usb in my kernel configuration.
> 
> Is the usb passthrough support merged with the latest stable kernel in
> kernel.org?
> 
> If yes, What all configuration should I enable in my config?
> 
> 
> 
> Regards,
> 
> Ajeesh

> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> https://lists.xen.org/xen-devel


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Re: USB Passthrough support X86_64

[Juergen Gross]

On 21/07/17 10:28, Wei Liu wrote:
> CC Juergen and George
> 
> On Thu, Jul 20, 2017 at 01:05:20PM +0530, Ajmal M Ali wrote:
>> Hi,
>>
>> I am trying to do USB passthrough in x86_64. I have Ubuntu as Dom0 and DomU.
>>
>>
>>
>> *Dom0 : Linux teltvm0881 4.8.0-58-generic #63~16.04.1-Ubuntu SMP Mon Jun 26
>> 18:08:51 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux*
>>
>> *DomU : Linux xen-guest-pv 4.12.0-custom #4 SMP Tue Jul 11 17:14:53 IST
>> 2017 x86_64 GNU/Linux*
>>
>>
>>
>> I had earlier, rebuild the kernel from kernel.orgto add PCI passthrough
>> support which was successful.
>>
>> But when i try to do USB passthrough, as given in,
>>
>> https://wiki.xenproject.org/wiki/Xen_USB_Passthrough
>>
>> it dont work.ie.
>>
>>
>>
>> *# xl usbctrl-attach xen-guest-pv version=1 ports=8*
>>
>> *libxl: error: libxl_dm.c:2423:libxl__dm_check_start: device model required
>> but not running*
>>
>> *libxl: error: libxl.c:2012:device_addrm_aocomplete: unable to add device*
>>
>> *libxl_device_usbctrl_add failed.*
>>
>>
>>
>> Why is this?
> 
> USB passthrough requires the device model. There is currently no
> provision in toolstack to spawn a device model on demand.
> 
> The easiest workaround is to add one device (vfb?) that would require
> spawning a device model when creating the domain.
> 
>>
>> i am trying to hotplug my usb. I haveint made any changes in the config
>> file, as i assumed it wont be needed for hotplug, also i didnt have to do
>> it for pci passthrough. Should i?
>>
>> Also, i cannot find any usbback and frond in my PC.

Uuh, yes. I've sent some patches to LKML for pvUSB frontend support
about 2 years ago:

https://lists.xen.org/archives/html/xen-devel/2015-06/msg03436.html

I didn't find any time since then to address all comments. Maybe I
should finish that task...

The patches should still work fine, AFAIK.


Juergen

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Re: USB Passthrough support X86_64

[Pasi Kärkkäinen]

On Fri, Jul 21, 2017 at 10:39:36AM +0200, Juergen Gross wrote:
> > 
> > USB passthrough requires the device model. There is currently no
> > provision in toolstack to spawn a device model on demand.
> > 
> > The easiest workaround is to add one device (vfb?) that would require
> > spawning a device model when creating the domain.
> > 
> >>
> >> i am trying to hotplug my usb. I haveint made any changes in the config
> >> file, as i assumed it wont be needed for hotplug, also i didnt have to do
> >> it for pci passthrough. Should i?
> >>
> >> Also, i cannot find any usbback and frond in my PC.
> 
> Uuh, yes. I've sent some patches to LKML for pvUSB frontend support
> about 2 years ago:
> 
> https://lists.xen.org/archives/html/xen-devel/2015-06/msg03436.html
> 
> I didn't find any time since then to address all comments. Maybe I
> should finish that task...
> 

That'd be awesome! :)

> The patches should still work fine, AFAIK.
> 

Good to know.


-- Pasi

> 
> Juergen
> 


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Re: USB Passthrough support X86_64

[Ajmal M Ali]

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On 21-Jul-2017 2:17 PM, "Pasi Kärkkäinen" <pasik@iki.fi> wrote:

> On Fri, Jul 21, 2017 at 10:39:36AM +0200, Juergen Gross wrote:
> > >
> > > USB passthrough requires the device model. There is currently no
> > > provision in toolstack to spawn a device model on demand.
> > >
> > > The easiest workaround is to add one device (vfb?) that would require
> > > spawning a device model when creating the domain.
> > >
> > >>
> > >> i am trying to hotplug my usb. I haveint made any changes in the
> config
> > >> file, as i assumed it wont be needed for hotplug, also i didnt have
> to do
> > >> it for pci passthrough. Should i?
> > >>
> > >> Also, i cannot find any usbback and frond in my PC.
> >
> > Uuh, yes. I've sent some patches to LKML for pvUSB frontend support
> > about 2 years ago:
> >
> > https://lists.xen.org/archives/html/xen-devel/2015-06/msg03436.html
> >
> > I didn't find any time since then to address all comments. Maybe I
> > should finish that task...
> >
>
> That'd be awesome! :)
>
> > The patches should still work fine, AFAIK.
> >
>
> Good to know.
>
>
> -- Pasi
>
> >
> > Juergen
> >
>
>

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Re: USB Passthrough support X86_64

[Ajmal M Ali]

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Hi,

I need USB Passthrough for my work(pv). For that I am trying to write USB
front and back drivers. Besides these what else is needed for the
Passthrough to work?
Should I have to also do the part to add device model(xl) or is it already
done.

I got some patches for adding the front-end driver. Have anyone worked on
backend for usb?

If anyone could point me to anything that might help, that would be
wonderful. I have minimal experience in Linux driver.

Regards
Ajmal


On 03-Aug-2017 2:48 PM, "Ajmal M Ali" <ajeeshb4u@gmail.com> wrote:

>
> On 21-Jul-2017 2:17 PM, "Pasi Kärkkäinen" <pasik@iki.fi> wrote:
>
>> On Fri, Jul 21, 2017 at 10:39:36AM +0200, Juergen Gross wrote:
>> > >
>> > > USB passthrough requires the device model. There is currently no
>> > > provision in toolstack to spawn a device model on demand.
>> > >
>> > > The easiest workaround is to add one device (vfb?) that would require
>> > > spawning a device model when creating the domain.
>> > >
>> > >>
>> > >> i am trying to hotplug my usb. I haveint made any changes in the
>> config
>> > >> file, as i assumed it wont be needed for hotplug, also i didnt have
>> to do
>> > >> it for pci passthrough. Should i?
>> > >>
>> > >> Also, i cannot find any usbback and frond in my PC.
>> >
>> > Uuh, yes. I've sent some patches to LKML for pvUSB frontend support
>> > about 2 years ago:
>> >
>> > https://lists.xen.org/archives/html/xen-devel/2015-06/msg03436.html
>> >
>> > I didn't find any time since then to address all comments. Maybe I
>> > should finish that task...
>> >
>>
>> That'd be awesome! :)
>>
>> > The patches should still work fine, AFAIK.
>> >
>>
>> Good to know.
>>
>>
>> -- Pasi
>>
>> >
>> > Juergen
>> >
>>
>>

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Re: USB Passthrough support X86_64

[Juergen Gross]

On 03/08/17 11:26, Ajmal M Ali wrote:
> Hi,
> 
> I need USB Passthrough for my work(pv). For that I am trying to write
> USB front and back drivers. Besides these what else is needed for the
> Passthrough to work?
> Should I have to also do the part to add device model(xl) or is it
> already done.

Done already.

> I got some patches for adding the front-end driver. Have anyone worked
> on backend for usb?

Its part of qemu (userland backend).


Juergen

> 
> If anyone could point me to anything that might help, that would be
> wonderful. I have minimal experience in Linux driver.
> 
> Regards
> Ajmal
> 
> 
> On 03-Aug-2017 2:48 PM, "Ajmal M Ali" <ajeeshb4u@gmail.com
> <mailto:ajeeshb4u@gmail.com>> wrote:
> 
> 
>     On 21-Jul-2017 2:17 PM, "Pasi Kärkkäinen" <pasik@iki.fi
>     <mailto:pasik@iki.fi>> wrote:
> 
>         On Fri, Jul 21, 2017 at 10:39:36AM +0200, Juergen Gross wrote:
>         > >
>         > > USB passthrough requires the device model. There is currently no
>         > > provision in toolstack to spawn a device model on demand.
>         > >
>         > > The easiest workaround is to add one device (vfb?) that
>         would require
>         > > spawning a device model when creating the domain.
>         > >
>         > >>
>         > >> i am trying to hotplug my usb. I haveint made any changes
>         in the config
>         > >> file, as i assumed it wont be needed for hotplug, also i
>         didnt have to do
>         > >> it for pci passthrough. Should i?
>         > >>
>         > >> Also, i cannot find any usbback and frond in my PC.
>         >
>         > Uuh, yes. I've sent some patches to LKML for pvUSB frontend
>         support
>         > about 2 years ago:
>         >
>         >
>         https://lists.xen.org/archives/html/xen-devel/2015-06/msg03436.html
>         <https://lists.xen.org/archives/html/xen-devel/2015-06/msg03436.html>
>         >
>         > I didn't find any time since then to address all comments. Maybe I
>         > should finish that task...
>         >
> 
>         That'd be awesome! :)
> 
>         > The patches should still work fine, AFAIK.
>         >
> 
>         Good to know.
> 
> 
>         -- Pasi
> 
>         >
>         > Juergen
>         >
> 


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Re: USB Passthrough support X86_64

[Ajmal M Ali]

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Hi,

Will it work for Arm?
I have seen usb passthrough support in kernel 2.6 but not in 4.12.
Has it been merged with the latest kernel?

Regards,
Ajmal

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