vga passthrough with qemu-xen (or qemu upstream)

vga passthrough with qemu-xen (or qemu upstream)

[Shakeel Butt]

Hi all,

Is it possible to do vga passthrough on xen-unstable with qemu-xen as
device model? I tried but I am getting error 'gfx_passthru' invalid
parameter for qemu-xen. I am able to do passthrough with qemu
traditional i.e. qemu-dm.

thanks,
Shakeel

Re: vga passthrough with qemu-xen (or qemu upstream)

[Wu, Feng]

> -----Original Message-----
> From: xen-devel-bounces@lists.xen.org
> [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel Butt
> Sent: Monday, January 20, 2014 1:48 PM
> To: xen-devel@lists.xen.org
> Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
> 
> Hi all,
> 
> Is it possible to do vga passthrough on xen-unstable with qemu-xen as
> device model? I tried but I am getting error 'gfx_passthru' invalid
> parameter for qemu-xen. I am able to do passthrough with qemu
> traditional i.e. qemu-dm.

As far as I know, only qemu-traditional supports vga pass-through right now.
> 
> thanks,
> Shakeel
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel

Thanks,
Feng

Re: vga passthrough with qemu-xen (or qemu upstream)

[Stefano Stabellini]

On Mon, 20 Jan 2014, Wu, Feng wrote:
> > -----Original Message-----
> > From: xen-devel-bounces@lists.xen.org
> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel Butt
> > Sent: Monday, January 20, 2014 1:48 PM
> > To: xen-devel@lists.xen.org
> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
> > 
> > Hi all,
> > 
> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
> > device model? I tried but I am getting error 'gfx_passthru' invalid
> > parameter for qemu-xen. I am able to do passthrough with qemu
> > traditional i.e. qemu-dm.
> 
> As far as I know, only qemu-traditional supports vga pass-through right now.

Right.
It is not possible to assign your primary VGA card to a VM with
qemu-xen. You should be able to assign your secondary VGA card though.

Re: vga passthrough with qemu-xen (or qemu upstream)

[Shakeel Butt]

On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
<stefano.stabellini@eu.citrix.com> wrote:
> On Mon, 20 Jan 2014, Wu, Feng wrote:
>> > -----Original Message-----
>> > From: xen-devel-bounces@lists.xen.org
>> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel Butt
>> > Sent: Monday, January 20, 2014 1:48 PM
>> > To: xen-devel@lists.xen.org
>> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
>> >
>> > Hi all,
>> >
>> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
>> > device model? I tried but I am getting error 'gfx_passthru' invalid
>> > parameter for qemu-xen. I am able to do passthrough with qemu
>> > traditional i.e. qemu-dm.
>>
>> As far as I know, only qemu-traditional supports vga pass-through right now.
>
> Right.
> It is not possible to assign your primary VGA card to a VM with
> qemu-xen. You should be able to assign your secondary VGA card though.

Let me understand this correctly. If I have two VGA cards then I can
passthrough
secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this right and
if yes how can I do it?

Re: vga passthrough with qemu-xen (or qemu upstream)

[Gordan Bobic]

On 2014-01-20 12:31, Shakeel Butt wrote:
> On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
> <stefano.stabellini@eu.citrix.com> wrote:
>> On Mon, 20 Jan 2014, Wu, Feng wrote:
>>> > -----Original Message-----
>>> > From: xen-devel-bounces@lists.xen.org
>>> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel Butt
>>> > Sent: Monday, January 20, 2014 1:48 PM
>>> > To: xen-devel@lists.xen.org
>>> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
>>> >
>>> > Hi all,
>>> >
>>> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
>>> > device model? I tried but I am getting error 'gfx_passthru' invalid
>>> > parameter for qemu-xen. I am able to do passthrough with qemu
>>> > traditional i.e. qemu-dm.
>>> 
>>> As far as I know, only qemu-traditional supports vga pass-through 
>>> right now.
>> 
>> Right.
>> It is not possible to assign your primary VGA card to a VM with
>> qemu-xen. You should be able to assign your secondary VGA card though.
> 
> Let me understand this correctly. If I have two VGA cards then I can
> passthrough
> secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this 
> right and
> if yes how can I do it?

Passing any VGA card as a primary-in-domU has always been problematic.
Passing it as a secondary-in-domU generally works fine, though. Do you
have a specific requirement for the card to be primary in domU? It
doesn't actually gain you anything over and above seeing your domU
loading screen on the external monitor. Once the driver for the card
loads you get output as per normal.

Why do you need it to be primary in domU?

Gordan

Re: vga passthrough with qemu-xen (or qemu upstream)

[Wu, Feng]

> -----Original Message-----
> From: xen-devel-bounces@lists.xen.org
> [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Gordan Bobic
> Sent: Monday, January 20, 2014 8:50 PM
> To: xen-devel@lists.xen.org
> Subject: Re: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
> 
> On 2014-01-20 12:31, Shakeel Butt wrote:
> > On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
> > <stefano.stabellini@eu.citrix.com> wrote:
> >> On Mon, 20 Jan 2014, Wu, Feng wrote:
> >>> > -----Original Message-----
> >>> > From: xen-devel-bounces@lists.xen.org
> >>> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel Butt
> >>> > Sent: Monday, January 20, 2014 1:48 PM
> >>> > To: xen-devel@lists.xen.org
> >>> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
> >>> >
> >>> > Hi all,
> >>> >
> >>> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
> >>> > device model? I tried but I am getting error 'gfx_passthru' invalid
> >>> > parameter for qemu-xen. I am able to do passthrough with qemu
> >>> > traditional i.e. qemu-dm.
> >>>
> >>> As far as I know, only qemu-traditional supports vga pass-through
> >>> right now.
> >>
> >> Right.
> >> It is not possible to assign your primary VGA card to a VM with
> >> qemu-xen. You should be able to assign your secondary VGA card though.
> >
> > Let me understand this correctly. If I have two VGA cards then I can
> > passthrough
> > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this
> > right and
> > if yes how can I do it?
> 
> Passing any VGA card as a primary-in-domU has always been problematic.

I think passing VGA card as a primary-in-domU works well in Qemu-traditional, right?

> Passing it as a secondary-in-domU generally works fine, though. Do you
> have a specific requirement for the card to be primary in domU? It
> doesn't actually gain you anything over and above seeing your domU
> loading screen on the external monitor. Once the driver for the card
> loads you get output as per normal.
> 
> Why do you need it to be primary in domU?
> 
> Gordan
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel

Thanks,
Feng

Re: vga passthrough with qemu-xen (or qemu upstream)

[Gordan Bobic]

On 2014-01-20 13:24, Wu, Feng wrote:
>> -----Original Message-----
>> From: xen-devel-bounces@lists.xen.org
>> [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Gordan Bobic
>> Sent: Monday, January 20, 2014 8:50 PM
>> To: xen-devel@lists.xen.org
>> Subject: Re: [Xen-devel] vga passthrough with qemu-xen (or qemu 
>> upstream)
>> 
>> On 2014-01-20 12:31, Shakeel Butt wrote:
>> > On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
>> > <stefano.stabellini@eu.citrix.com> wrote:
>> >> On Mon, 20 Jan 2014, Wu, Feng wrote:
>> >>> > -----Original Message-----
>> >>> > From: xen-devel-bounces@lists.xen.org
>> >>> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel Butt
>> >>> > Sent: Monday, January 20, 2014 1:48 PM
>> >>> > To: xen-devel@lists.xen.org
>> >>> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
>> >>> >
>> >>> > Hi all,
>> >>> >
>> >>> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
>> >>> > device model? I tried but I am getting error 'gfx_passthru' invalid
>> >>> > parameter for qemu-xen. I am able to do passthrough with qemu
>> >>> > traditional i.e. qemu-dm.
>> >>>
>> >>> As far as I know, only qemu-traditional supports vga pass-through
>> >>> right now.
>> >>
>> >> Right.
>> >> It is not possible to assign your primary VGA card to a VM with
>> >> qemu-xen. You should be able to assign your secondary VGA card though.
>> >
>> > Let me understand this correctly. If I have two VGA cards then I can
>> > passthrough
>> > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this
>> > right and
>> > if yes how can I do it?
>> 
>> Passing any VGA card as a primary-in-domU has always been problematic.
> 
> I think passing VGA card as a primary-in-domU works well in
> Qemu-traditional, right?

I never managed to get it working - it certainly isn't just a matter of
enabling the option. There is at least the matter of also side-loading
the VGA BIOS, and IIRC that was limited to 64KB in size, which rules
out all ATI and Nvidia GPUs of the past 2-3 generations.

Having said that - I never found a particularly good use-case for
primary passthrough. Once the GPU driver loads it works just the
same for all intents and purposes.

Gordan

Re: vga passthrough with qemu-xen (or qemu upstream)

[Shakeel Butt]

On Mon, Jan 20, 2014 at 5:31 AM, Gordan Bobic <gordan@bobich.net> wrote:
> On 2014-01-20 13:24, Wu, Feng wrote:
>>>
>>> -----Original Message-----
>>> From: xen-devel-bounces@lists.xen.org
>>> [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Gordan Bobic
>>> Sent: Monday, January 20, 2014 8:50 PM
>>> To: xen-devel@lists.xen.org
>>> Subject: Re: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
>>>
>>> On 2014-01-20 12:31, Shakeel Butt wrote:
>>> > On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
>>> > <stefano.stabellini@eu.citrix.com> wrote:
>>> >> On Mon, 20 Jan 2014, Wu, Feng wrote:
>>> >>> > -----Original Message-----
>>> >>> > From: xen-devel-bounces@lists.xen.org
>>> >>> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel Butt
>>> >>> > Sent: Monday, January 20, 2014 1:48 PM
>>> >>> > To: xen-devel@lists.xen.org
>>> >>> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu
>>> >>> > upstream)
>>> >>> >
>>> >>> > Hi all,
>>> >>> >
>>> >>> > Is it possible to do vga passthrough on xen-unstable with qemu-xen
>>> >>> > as
>>> >>> > device model? I tried but I am getting error 'gfx_passthru' invalid
>>> >>> > parameter for qemu-xen. I am able to do passthrough with qemu
>>> >>> > traditional i.e. qemu-dm.
>>> >>>
>>> >>> As far as I know, only qemu-traditional supports vga pass-through
>>> >>> right now.
>>> >>
>>> >> Right.
>>> >> It is not possible to assign your primary VGA card to a VM with
>>> >> qemu-xen. You should be able to assign your secondary VGA card though.
>>> >
>>> > Let me understand this correctly. If I have two VGA cards then I can
>>> > passthrough
>>> > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this
>>> > right and
>>> > if yes how can I do it?
>>>
>>> Passing any VGA card as a primary-in-domU has always been problematic.
>>
>>
>> I think passing VGA card as a primary-in-domU works well in
>> Qemu-traditional, right?
>
>
> I never managed to get it working - it certainly isn't just a matter of
> enabling the option. There is at least the matter of also side-loading
> the VGA BIOS, and IIRC that was limited to 64KB in size, which rules
> out all ATI and Nvidia GPUs of the past 2-3 generations.
>
> Having said that - I never found a particularly good use-case for
> primary passthrough. Once the GPU driver loads it works just the
> same for all intents and purposes.
>

I have successfully managed to passthrough VGA card as primary to DomU
with qemu traditional. I am trying to do the same with upstream qemu because
 I need some new features of the upstream qemu which are not available
in qemu traditional.

With qemu upstream I can passthrough as secondary VGA card to DomU
and able to see it in device manager in DomU (Windows 7) but Windows
couldn't use it and display some error that another card is being used as
display. I want Windows to use the passthroughed vga card  as its display.

Shakeel

Re: vga passthrough with qemu-xen (or qemu upstream)

[Gordan Bobic]

On 2014-01-20 15:19, Shakeel Butt wrote:
> On Mon, Jan 20, 2014 at 5:31 AM, Gordan Bobic <gordan@bobich.net> 
> wrote:
>> On 2014-01-20 13:24, Wu, Feng wrote:
>>>> 
>>>> -----Original Message-----
>>>> From: xen-devel-bounces@lists.xen.org
>>>> [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Gordan Bobic
>>>> Sent: Monday, January 20, 2014 8:50 PM
>>>> To: xen-devel@lists.xen.org
>>>> Subject: Re: [Xen-devel] vga passthrough with qemu-xen (or qemu 
>>>> upstream)
>>>> 
>>>> On 2014-01-20 12:31, Shakeel Butt wrote:
>>>> > On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
>>>> > <stefano.stabellini@eu.citrix.com> wrote:
>>>> >> On Mon, 20 Jan 2014, Wu, Feng wrote:
>>>> >>> > -----Original Message-----
>>>> >>> > From: xen-devel-bounces@lists.xen.org
>>>> >>> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel Butt
>>>> >>> > Sent: Monday, January 20, 2014 1:48 PM
>>>> >>> > To: xen-devel@lists.xen.org
>>>> >>> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu
>>>> >>> > upstream)
>>>> >>> >
>>>> >>> > Hi all,
>>>> >>> >
>>>> >>> > Is it possible to do vga passthrough on xen-unstable with qemu-xen
>>>> >>> > as
>>>> >>> > device model? I tried but I am getting error 'gfx_passthru' invalid
>>>> >>> > parameter for qemu-xen. I am able to do passthrough with qemu
>>>> >>> > traditional i.e. qemu-dm.
>>>> >>>
>>>> >>> As far as I know, only qemu-traditional supports vga pass-through
>>>> >>> right now.
>>>> >>
>>>> >> Right.
>>>> >> It is not possible to assign your primary VGA card to a VM with
>>>> >> qemu-xen. You should be able to assign your secondary VGA card though.
>>>> >
>>>> > Let me understand this correctly. If I have two VGA cards then I can
>>>> > passthrough
>>>> > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this
>>>> > right and
>>>> > if yes how can I do it?
>>>> 
>>>> Passing any VGA card as a primary-in-domU has always been 
>>>> problematic.
>>> 
>>> 
>>> I think passing VGA card as a primary-in-domU works well in
>>> Qemu-traditional, right?
>> 
>> 
>> I never managed to get it working - it certainly isn't just a matter 
>> of
>> enabling the option. There is at least the matter of also side-loading
>> the VGA BIOS, and IIRC that was limited to 64KB in size, which rules
>> out all ATI and Nvidia GPUs of the past 2-3 generations.
>> 
>> Having said that - I never found a particularly good use-case for
>> primary passthrough. Once the GPU driver loads it works just the
>> same for all intents and purposes.
>> 
> 
> I have successfully managed to passthrough VGA card as primary to DomU
> with qemu traditional. I am trying to do the same with upstream qemu 
> because
>  I need some new features of the upstream qemu which are not available
> in qemu traditional.
> 
> With qemu upstream I can passthrough as secondary VGA card to DomU
> and able to see it in device manager in DomU (Windows 7) but Windows
> couldn't use it and display some error that another card is being used 
> as
> display. I want Windows to use the passthroughed vga card  as its 
> display.

Disable the other (emulated) card in device manager and reboot
the domU. That should fix it.

Gordan

Re: vga passthrough with qemu-xen (or qemu upstream)

[Shakeel Butt]

On Mon, Jan 20, 2014 at 7:29 AM, Gordan Bobic <gordan@bobich.net> wrote:
> On 2014-01-20 15:19, Shakeel Butt wrote:
>>
>> On Mon, Jan 20, 2014 at 5:31 AM, Gordan Bobic <gordan@bobich.net> wrote:
>>>
>>> On 2014-01-20 13:24, Wu, Feng wrote:
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: xen-devel-bounces@lists.xen.org
>>>>> [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Gordan Bobic
>>>>> Sent: Monday, January 20, 2014 8:50 PM
>>>>> To: xen-devel@lists.xen.org
>>>>> Subject: Re: [Xen-devel] vga passthrough with qemu-xen (or qemu
>>>>> upstream)
>>>>>
>>>>> On 2014-01-20 12:31, Shakeel Butt wrote:
>>>>> > On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
>>>>> > <stefano.stabellini@eu.citrix.com> wrote:
>>>>> >> On Mon, 20 Jan 2014, Wu, Feng wrote:
>>>>> >>> > -----Original Message-----
>>>>> >>> > From: xen-devel-bounces@lists.xen.org
>>>>> >>> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel
>>>>> >>> > Butt
>>>>> >>> > Sent: Monday, January 20, 2014 1:48 PM
>>>>> >>> > To: xen-devel@lists.xen.org
>>>>> >>> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu
>>>>> >>> > upstream)
>>>>> >>> >
>>>>> >>> > Hi all,
>>>>> >>> >
>>>>> >>> > Is it possible to do vga passthrough on xen-unstable with
>>>>> >>> > qemu-xen
>>>>> >>> > as
>>>>> >>> > device model? I tried but I am getting error 'gfx_passthru'
>>>>> >>> > invalid
>>>>> >>> > parameter for qemu-xen. I am able to do passthrough with qemu
>>>>> >>> > traditional i.e. qemu-dm.
>>>>> >>>
>>>>> >>> As far as I know, only qemu-traditional supports vga pass-through
>>>>> >>> right now.
>>>>> >>
>>>>> >> Right.
>>>>> >> It is not possible to assign your primary VGA card to a VM with
>>>>> >> qemu-xen. You should be able to assign your secondary VGA card
>>>>> >> though.
>>>>> >
>>>>> > Let me understand this correctly. If I have two VGA cards then I can
>>>>> > passthrough
>>>>> > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this
>>>>> > right and
>>>>> > if yes how can I do it?
>>>>>
>>>>> Passing any VGA card as a primary-in-domU has always been problematic.
>>>>
>>>>
>>>>
>>>> I think passing VGA card as a primary-in-domU works well in
>>>> Qemu-traditional, right?
>>>
>>>
>>>
>>> I never managed to get it working - it certainly isn't just a matter of
>>> enabling the option. There is at least the matter of also side-loading
>>> the VGA BIOS, and IIRC that was limited to 64KB in size, which rules
>>> out all ATI and Nvidia GPUs of the past 2-3 generations.
>>>
>>> Having said that - I never found a particularly good use-case for
>>> primary passthrough. Once the GPU driver loads it works just the
>>> same for all intents and purposes.
>>>
>>
>> I have successfully managed to passthrough VGA card as primary to DomU
>> with qemu traditional. I am trying to do the same with upstream qemu
>> because
>>  I need some new features of the upstream qemu which are not available
>> in qemu traditional.
>>
>> With qemu upstream I can passthrough as secondary VGA card to DomU
>> and able to see it in device manager in DomU (Windows 7) but Windows
>> couldn't use it and display some error that another card is being used as
>> display. I want Windows to use the passthroughed vga card  as its display.
>
>
> Disable the other (emulated) card in device manager and reboot
> the domU. That should fix it.

This is not working for me. I am disabling the device and even uninstalling the
driver but on reboot Windows 7 install the driver for the emulated vga and
make it primary vga.

Is there a way to stop qemu upstream from emulating vga. I tried 'nographics'
in xl.conf but Windows still see the emulated vga.

Shakeel

Re: vga passthrough with qemu-xen (or qemu upstream)

[Gordan Bobic]

On 01/20/2014 09:15 PM, Shakeel Butt wrote:
> On Mon, Jan 20, 2014 at 7:29 AM, Gordan Bobic <gordan@bobich.net> wrote:
>> On 2014-01-20 15:19, Shakeel Butt wrote:
>>>
>>> On Mon, Jan 20, 2014 at 5:31 AM, Gordan Bobic <gordan@bobich.net> wrote:
>>>>
>>>> On 2014-01-20 13:24, Wu, Feng wrote:
>>>>>>
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: xen-devel-bounces@lists.xen.org
>>>>>> [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Gordan Bobic
>>>>>> Sent: Monday, January 20, 2014 8:50 PM
>>>>>> To: xen-devel@lists.xen.org
>>>>>> Subject: Re: [Xen-devel] vga passthrough with qemu-xen (or qemu
>>>>>> upstream)
>>>>>>
>>>>>> On 2014-01-20 12:31, Shakeel Butt wrote:
>>>>>>> On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
>>>>>>> <stefano.stabellini@eu.citrix.com> wrote:
>>>>>>>> On Mon, 20 Jan 2014, Wu, Feng wrote:
>>>>>>>>>> -----Original Message-----
>>>>>>>>>> From: xen-devel-bounces@lists.xen.org
>>>>>>>>>> [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel
>>>>>>>>>> Butt
>>>>>>>>>> Sent: Monday, January 20, 2014 1:48 PM
>>>>>>>>>> To: xen-devel@lists.xen.org
>>>>>>>>>> Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu
>>>>>>>>>> upstream)
>>>>>>>>>>
>>>>>>>>>> Hi all,
>>>>>>>>>>
>>>>>>>>>> Is it possible to do vga passthrough on xen-unstable with
>>>>>>>>>> qemu-xen
>>>>>>>>>> as
>>>>>>>>>> device model? I tried but I am getting error 'gfx_passthru'
>>>>>>>>>> invalid
>>>>>>>>>> parameter for qemu-xen. I am able to do passthrough with qemu
>>>>>>>>>> traditional i.e. qemu-dm.
>>>>>>>>>
>>>>>>>>> As far as I know, only qemu-traditional supports vga pass-through
>>>>>>>>> right now.
>>>>>>>>
>>>>>>>> Right.
>>>>>>>> It is not possible to assign your primary VGA card to a VM with
>>>>>>>> qemu-xen. You should be able to assign your secondary VGA card
>>>>>>>> though.
>>>>>>>
>>>>>>> Let me understand this correctly. If I have two VGA cards then I can
>>>>>>> passthrough
>>>>>>> secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this
>>>>>>> right and
>>>>>>> if yes how can I do it?
>>>>>>
>>>>>> Passing any VGA card as a primary-in-domU has always been problematic.
>>>>>
>>>>>
>>>>>
>>>>> I think passing VGA card as a primary-in-domU works well in
>>>>> Qemu-traditional, right?
>>>>
>>>>
>>>>
>>>> I never managed to get it working - it certainly isn't just a matter of
>>>> enabling the option. There is at least the matter of also side-loading
>>>> the VGA BIOS, and IIRC that was limited to 64KB in size, which rules
>>>> out all ATI and Nvidia GPUs of the past 2-3 generations.
>>>>
>>>> Having said that - I never found a particularly good use-case for
>>>> primary passthrough. Once the GPU driver loads it works just the
>>>> same for all intents and purposes.
>>>>
>>>
>>> I have successfully managed to passthrough VGA card as primary to DomU
>>> with qemu traditional. I am trying to do the same with upstream qemu
>>> because
>>>   I need some new features of the upstream qemu which are not available
>>> in qemu traditional.
>>>
>>> With qemu upstream I can passthrough as secondary VGA card to DomU
>>> and able to see it in device manager in DomU (Windows 7) but Windows
>>> couldn't use it and display some error that another card is being used as
>>> display. I want Windows to use the passthroughed vga card  as its display.
>>
>>
>> Disable the other (emulated) card in device manager and reboot
>> the domU. That should fix it.
>
> This is not working for me. I am disabling the device and even uninstalling the
> driver but on reboot Windows 7 install the driver for the emulated vga and
> make it primary vga.

Don't uninstall the driver, just disable the device. If you uninstall 
it, it will get re-detected. If you disable it, it should show up with a 
red cross next to it, and your secondary GPU will start working the way 
you want it to.

Re: vga passthrough with qemu-xen (or qemu upstream)

[Fabio Fantoni]

[-- Attachment #1.1: Type: text/plain, Size: 4149 bytes --]

2014/1/20 Shakeel Butt <shakeel.butt@gmail.com>

> On Mon, Jan 20, 2014 at 7:29 AM, Gordan Bobic <gordan@bobich.net> wrote:
> > On 2014-01-20 15:19, Shakeel Butt wrote:
> >>
> >> On Mon, Jan 20, 2014 at 5:31 AM, Gordan Bobic <gordan@bobich.net>
> wrote:
> >>>
> >>> On 2014-01-20 13:24, Wu, Feng wrote:
> >>>>>
> >>>>>
> >>>>> -----Original Message-----
> >>>>> From: xen-devel-bounces@lists.xen.org
> >>>>> [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Gordan Bobic
> >>>>> Sent: Monday, January 20, 2014 8:50 PM
> >>>>> To: xen-devel@lists.xen.org
> >>>>> Subject: Re: [Xen-devel] vga passthrough with qemu-xen (or qemu
> >>>>> upstream)
> >>>>>
> >>>>> On 2014-01-20 12:31, Shakeel Butt wrote:
> >>>>> > On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
> >>>>> > <stefano.stabellini@eu.citrix.com> wrote:
> >>>>> >> On Mon, 20 Jan 2014, Wu, Feng wrote:
> >>>>> >>> > -----Original Message-----
> >>>>> >>> > From: xen-devel-bounces@lists.xen.org
> >>>>> >>> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel
> >>>>> >>> > Butt
> >>>>> >>> > Sent: Monday, January 20, 2014 1:48 PM
> >>>>> >>> > To: xen-devel@lists.xen.org
> >>>>> >>> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu
> >>>>> >>> > upstream)
> >>>>> >>> >
> >>>>> >>> > Hi all,
> >>>>> >>> >
> >>>>> >>> > Is it possible to do vga passthrough on xen-unstable with
> >>>>> >>> > qemu-xen
> >>>>> >>> > as
> >>>>> >>> > device model? I tried but I am getting error 'gfx_passthru'
> >>>>> >>> > invalid
> >>>>> >>> > parameter for qemu-xen. I am able to do passthrough with qemu
> >>>>> >>> > traditional i.e. qemu-dm.
> >>>>> >>>
> >>>>> >>> As far as I know, only qemu-traditional supports vga pass-through
> >>>>> >>> right now.
> >>>>> >>
> >>>>> >> Right.
> >>>>> >> It is not possible to assign your primary VGA card to a VM with
> >>>>> >> qemu-xen. You should be able to assign your secondary VGA card
> >>>>> >> though.
> >>>>> >
> >>>>> > Let me understand this correctly. If I have two VGA cards then I
> can
> >>>>> > passthrough
> >>>>> > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is
> this
> >>>>> > right and
> >>>>> > if yes how can I do it?
> >>>>>
> >>>>> Passing any VGA card as a primary-in-domU has always been
> problematic.
> >>>>
> >>>>
> >>>>
> >>>> I think passing VGA card as a primary-in-domU works well in
> >>>> Qemu-traditional, right?
> >>>
> >>>
> >>>
> >>> I never managed to get it working - it certainly isn't just a matter of
> >>> enabling the option. There is at least the matter of also side-loading
> >>> the VGA BIOS, and IIRC that was limited to 64KB in size, which rules
> >>> out all ATI and Nvidia GPUs of the past 2-3 generations.
> >>>
> >>> Having said that - I never found a particularly good use-case for
> >>> primary passthrough. Once the GPU driver loads it works just the
> >>> same for all intents and purposes.
> >>>
> >>
> >> I have successfully managed to passthrough VGA card as primary to DomU
> >> with qemu traditional. I am trying to do the same with upstream qemu
> >> because
> >>  I need some new features of the upstream qemu which are not available
> >> in qemu traditional.
> >>
> >> With qemu upstream I can passthrough as secondary VGA card to DomU
> >> and able to see it in device manager in DomU (Windows 7) but Windows
> >> couldn't use it and display some error that another card is being used
> as
> >> display. I want Windows to use the passthroughed vga card  as its
> display.
> >
> >
> > Disable the other (emulated) card in device manager and reboot
> > the domU. That should fix it.
>
> This is not working for me. I am disabling the device and even
> uninstalling the
> driver but on reboot Windows 7 install the driver for the emulated vga and
> make it primary vga.
>
> Is there a way to stop qemu upstream from emulating vga. I tried
> 'nographics'
> in xl.conf but Windows still see the emulated vga.
>

Try with this:
http://lists.xen.org/archives/html/xen-devel/2013-12/msg00725.html


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

[-- Attachment #1.2: Type: text/html, Size: 7026 bytes --]

[-- Attachment #2: Type: text/plain, Size: 126 bytes --]

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

Re: vga passthrough with qemu-xen (or qemu upstream)

[Pasi Kärkkäinen]

Hello,

On Mon, Jan 20, 2014 at 01:24:23PM +0000, Wu, Feng wrote:
> 
> 
> > >>> >
> > >>> > Hi all,
> > >>> >
> > >>> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
> > >>> > device model? I tried but I am getting error 'gfx_passthru' invalid
> > >>> > parameter for qemu-xen. I am able to do passthrough with qemu
> > >>> > traditional i.e. qemu-dm.
> > >>>
> > >>> As far as I know, only qemu-traditional supports vga pass-through
> > >>> right now.
> > >>
> > >> Right.
> > >> It is not possible to assign your primary VGA card to a VM with
> > >> qemu-xen. You should be able to assign your secondary VGA card though.
> > >
> > > Let me understand this correctly. If I have two VGA cards then I can
> > > passthrough
> > > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this
> > > right and
> > > if yes how can I do it?
> > 
> > Passing any VGA card as a primary-in-domU has always been problematic.
> 
> I think passing VGA card as a primary-in-domU works well in Qemu-traditional, right?
> 

primary-in-domU requires vendor specific hacks in Xen qemu.
qemu-traditional includes many patches for Intel IGD primary passthru support,
but patches for AMD/ATI and Nvidia GPUs aren't merged to qemu-traditional. 

There unapplied patches for qemu-traditional (AMD/Nvidia) GPU passthru are in 
various source trees, mailinglist archives, and on some blogs around the internet.

Also for Intel IGD I think there's at least one outstanding patch/fix that 
hasn't been merged to qemu-traditional yet, see:

http://lists.xenproject.org/archives/html/xen-devel/2013-02/msg00538.html
http://lists.xen.org/archives/html/xen-devel/2013-07/msg01385.html

The patch in question probably needs some work before it is suitable for being applied to qemu-traditional.


> 
> Thanks,
> Feng
> 

-- Pasi

Re: vga passthrough with qemu-xen (or qemu upstream)

[Shakeel Butt]

On Tue, Jan 21, 2014 at 4:55 AM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
> Hello,
>
> On Mon, Jan 20, 2014 at 01:24:23PM +0000, Wu, Feng wrote:
>>
>>
>> > >>> >
>> > >>> > Hi all,
>> > >>> >
>> > >>> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
>> > >>> > device model? I tried but I am getting error 'gfx_passthru' invalid
>> > >>> > parameter for qemu-xen. I am able to do passthrough with qemu
>> > >>> > traditional i.e. qemu-dm.
>> > >>>
>> > >>> As far as I know, only qemu-traditional supports vga pass-through
>> > >>> right now.
>> > >>
>> > >> Right.
>> > >> It is not possible to assign your primary VGA card to a VM with
>> > >> qemu-xen. You should be able to assign your secondary VGA card though.
>> > >
>> > > Let me understand this correctly. If I have two VGA cards then I can
>> > > passthrough
>> > > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this
>> > > right and
>> > > if yes how can I do it?
>> >
>> > Passing any VGA card as a primary-in-domU has always been problematic.
>>
>> I think passing VGA card as a primary-in-domU works well in Qemu-traditional, right?
>>
>
> primary-in-domU requires vendor specific hacks in Xen qemu.
> qemu-traditional includes many patches for Intel IGD primary passthru support,
> but patches for AMD/ATI and Nvidia GPUs aren't merged to qemu-traditional.
>
> There unapplied patches for qemu-traditional (AMD/Nvidia) GPU passthru are in
> various source trees, mailinglist archives, and on some blogs around the internet.
>
> Also for Intel IGD I think there's at least one outstanding patch/fix that
> hasn't been merged to qemu-traditional yet, see:
>
> http://lists.xenproject.org/archives/html/xen-devel/2013-02/msg00538.html
> http://lists.xen.org/archives/html/xen-devel/2013-07/msg01385.html
>
> The patch in question probably needs some work before it is suitable for being applied to qemu-traditional.
>
Thanks for sharing. Just for the information, I was able to make
Nvidia K2000 work
in passthrough mode without any patch to qemu traditional.

Re: vga passthrough with qemu-xen (or qemu upstream)

[Gordan Bobic]

On 2014-01-21 17:36, Shakeel Butt wrote:
> On Tue, Jan 21, 2014 at 4:55 AM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
>> Hello,
>> 
>> On Mon, Jan 20, 2014 at 01:24:23PM +0000, Wu, Feng wrote:
>>> 
>>> 
>>> > >>> >
>>> > >>> > Hi all,
>>> > >>> >
>>> > >>> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
>>> > >>> > device model? I tried but I am getting error 'gfx_passthru' invalid
>>> > >>> > parameter for qemu-xen. I am able to do passthrough with qemu
>>> > >>> > traditional i.e. qemu-dm.
>>> > >>>
>>> > >>> As far as I know, only qemu-traditional supports vga pass-through
>>> > >>> right now.
>>> > >>
>>> > >> Right.
>>> > >> It is not possible to assign your primary VGA card to a VM with
>>> > >> qemu-xen. You should be able to assign your secondary VGA card though.
>>> > >
>>> > > Let me understand this correctly. If I have two VGA cards then I can
>>> > > passthrough
>>> > > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this
>>> > > right and
>>> > > if yes how can I do it?
>>> >
>>> > Passing any VGA card as a primary-in-domU has always been problematic.
>>> 
>>> I think passing VGA card as a primary-in-domU works well in 
>>> Qemu-traditional, right?
>>> 
>> 
>> primary-in-domU requires vendor specific hacks in Xen qemu.
>> qemu-traditional includes many patches for Intel IGD primary passthru 
>> support,
>> but patches for AMD/ATI and Nvidia GPUs aren't merged to 
>> qemu-traditional.
>> 
>> There unapplied patches for qemu-traditional (AMD/Nvidia) GPU passthru 
>> are in
>> various source trees, mailinglist archives, and on some blogs around 
>> the internet.
>> 
>> Also for Intel IGD I think there's at least one outstanding patch/fix 
>> that
>> hasn't been merged to qemu-traditional yet, see:
>> 
>> http://lists.xenproject.org/archives/html/xen-devel/2013-02/msg00538.html
>> http://lists.xen.org/archives/html/xen-devel/2013-07/msg01385.html
>> 
>> The patch in question probably needs some work before it is suitable 
>> for being applied to qemu-traditional.
>> 
> Thanks for sharing. Just for the information, I was able to make
> Nvidia K2000 work
> in passthrough mode without any patch to qemu traditional.

All Quadro x000 and Kx000 cards, both genuine and modified GeForces
are known to work fine with VGA passthrough.

Gordan

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

Re: vga passthrough with qemu-xen (or qemu upstream)

[Wu, Feng]

> -----Original Message-----
> From: Shakeel Butt [mailto:shakeel.butt@gmail.com]
> Sent: Wednesday, January 22, 2014 1:37 AM
> To: Pasi Kärkkäinen
> Cc: Wu, Feng; Gordan Bobic; G.R.; G.R.; xen-devel@lists.xen.org
> Subject: Re: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
> 
> On Tue, Jan 21, 2014 at 4:55 AM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
> > Hello,
> >
> > On Mon, Jan 20, 2014 at 01:24:23PM +0000, Wu, Feng wrote:
> >>
> >>
> >> > >>> >
> >> > >>> > Hi all,
> >> > >>> >
> >> > >>> > Is it possible to do vga passthrough on xen-unstable with qemu-xen
> as
> >> > >>> > device model? I tried but I am getting error 'gfx_passthru' invalid
> >> > >>> > parameter for qemu-xen. I am able to do passthrough with qemu
> >> > >>> > traditional i.e. qemu-dm.
> >> > >>>
> >> > >>> As far as I know, only qemu-traditional supports vga pass-through
> >> > >>> right now.
> >> > >>
> >> > >> Right.
> >> > >> It is not possible to assign your primary VGA card to a VM with
> >> > >> qemu-xen. You should be able to assign your secondary VGA card
> though.
> >> > >
> >> > > Let me understand this correctly. If I have two VGA cards then I can
> >> > > passthrough
> >> > > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this
> >> > > right and
> >> > > if yes how can I do it?
> >> >
> >> > Passing any VGA card as a primary-in-domU has always been problematic.
> >>
> >> I think passing VGA card as a primary-in-domU works well in
> Qemu-traditional, right?
> >>
> >
> > primary-in-domU requires vendor specific hacks in Xen qemu.
> > qemu-traditional includes many patches for Intel IGD primary passthru
> support,
> > but patches for AMD/ATI and Nvidia GPUs aren't merged to qemu-traditional.
> >
> > There unapplied patches for qemu-traditional (AMD/Nvidia) GPU passthru are
> in
> > various source trees, mailinglist archives, and on some blogs around the
> internet.
> >
> > Also for Intel IGD I think there's at least one outstanding patch/fix that
> > hasn't been merged to qemu-traditional yet, see:
> >
> > http://lists.xenproject.org/archives/html/xen-devel/2013-02/msg00538.html
> > http://lists.xen.org/archives/html/xen-devel/2013-07/msg01385.html
> >
> > The patch in question probably needs some work before it is suitable for being
> applied to qemu-traditional.
> >
> Thanks for sharing. Just for the information, I was able to make
> Nvidia K2000 work
> in passthrough mode without any patch to qemu traditional.

Intel IGD pass-through also works well on Sandy bridge, Ivy bridge, HSW platform
with qemu-traditional.

Thanks,
Feng

Re: vga passthrough with qemu-xen (or qemu upstream)

[Stefano Stabellini]

On Mon, 20 Jan 2014, Shakeel Butt wrote:
> On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
> <stefano.stabellini@eu.citrix.com> wrote:
> > On Mon, 20 Jan 2014, Wu, Feng wrote:
> >> > -----Original Message-----
> >> > From: xen-devel-bounces@lists.xen.org
> >> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel Butt
> >> > Sent: Monday, January 20, 2014 1:48 PM
> >> > To: xen-devel@lists.xen.org
> >> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
> >> >
> >> > Hi all,
> >> >
> >> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
> >> > device model? I tried but I am getting error 'gfx_passthru' invalid
> >> > parameter for qemu-xen. I am able to do passthrough with qemu
> >> > traditional i.e. qemu-dm.
> >>
> >> As far as I know, only qemu-traditional supports vga pass-through right now.
> >
> > Right.
> > It is not possible to assign your primary VGA card to a VM with
> > qemu-xen. You should be able to assign your secondary VGA card though.
> 
> Let me understand this correctly. If I have two VGA cards then I can
> passthrough
> secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this right and
> if yes how can I do it?

Yes, it is correct. Simply use normal PCI assignment

http://wiki.xen.org/wiki/Xen_PCI_Passthrough

Re: vga passthrough with qemu-xen (or qemu upstream)

[Stefano Stabellini]

On Mon, 20 Jan 2014, Stefano Stabellini wrote:
> On Mon, 20 Jan 2014, Shakeel Butt wrote:
> > On Mon, Jan 20, 2014 at 4:09 AM, Stefano Stabellini
> > <stefano.stabellini@eu.citrix.com> wrote:
> > > On Mon, 20 Jan 2014, Wu, Feng wrote:
> > >> > -----Original Message-----
> > >> > From: xen-devel-bounces@lists.xen.org
> > >> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Shakeel Butt
> > >> > Sent: Monday, January 20, 2014 1:48 PM
> > >> > To: xen-devel@lists.xen.org
> > >> > Subject: [Xen-devel] vga passthrough with qemu-xen (or qemu upstream)
> > >> >
> > >> > Hi all,
> > >> >
> > >> > Is it possible to do vga passthrough on xen-unstable with qemu-xen as
> > >> > device model? I tried but I am getting error 'gfx_passthru' invalid
> > >> > parameter for qemu-xen. I am able to do passthrough with qemu
> > >> > traditional i.e. qemu-dm.
> > >>
> > >> As far as I know, only qemu-traditional supports vga pass-through right now.
> > >
> > > Right.
> > > It is not possible to assign your primary VGA card to a VM with
> > > qemu-xen. You should be able to assign your secondary VGA card though.
> > 
> > Let me understand this correctly. If I have two VGA cards then I can
> > passthrough
> > secondary VGA card (in Dom0) to HVM as its primary VGA card. Is this right and
> > if yes how can I do it?
> 
> Yes, it is correct. Simply use normal PCI assignment
> 
> http://wiki.xen.org/wiki/Xen_PCI_Passthrough

Sorry, I meant assigning the secondary VGA card (in Dom0) to HVM as its
secondary VGA card (the primary card would be the emulated VGA inside
the HVM guest).