Xen on Qualcomm

Xen on Qualcomm

[Suresh Kanzariya]

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Hi Team,

https://www.xenproject.org/component/allvideoshare/video/samsung-nexus10-dual-xen-androud.html

The above link stats that "Samsung will discuss the issues encountered
using Xen on a mobile device in this demanding use-case, and how the
changes for Xen for mobile can be contributed into the community."

So Just wanted to know where can I find that list of challenges !!

I am sure it will be not a straight forward documents or list but any
format will be fine as I am trying to port xen on Qualcomm plataform.

Please Help !!.

-Suresh
-- 
Regards,
Suresh

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Re: Xen on Qualcomm

[Julien Grall]

On 31/10/16 14:59, Suresh Kanzariya wrote:
> Hi Julien,

Hi,

It seems that I forgot to add xen-devel on CC in my answer. Sorry for that.

> Thanks for the information.
>
> Just wanted to understand that Qualcomm boot itself contains a
> Hypervisor and also Xen is also a hypervisor, so I am not sure Xen
> hypervisor directly fits into the design, I guess Qualcomm hypervisor
> need modification or remove completely to support xen. It will be
> great if you can spread some light on this.

Indeed 2 hypervisors cannot cooperate on the same processor. If Qualcomm 
provides any hypervisor, you would have to remove it.

Although, I don't know much this platform, so I would recommend to 
contact Qualcomm for anything regarding that.

Regards,

-- 
Julien Grall

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Re: Xen on Qualcomm

[Suresh Kanzariya]

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Hi Julien,

Thanks for the information. Let me get some more information on this, and I
will get back to the mailing-list for further information.

Thanks,
Suresh

On Mon, Oct 31, 2016 at 8:34 PM, Julien Grall <julien.grall@arm.com> wrote:

>
>
> On 31/10/16 14:59, Suresh Kanzariya wrote:
>
>> Hi Julien,
>>
>
> Hi,
>
> It seems that I forgot to add xen-devel on CC in my answer. Sorry for that.
>
> Thanks for the information.
>>
>> Just wanted to understand that Qualcomm boot itself contains a
>> Hypervisor and also Xen is also a hypervisor, so I am not sure Xen
>> hypervisor directly fits into the design, I guess Qualcomm hypervisor
>> need modification or remove completely to support xen. It will be
>> great if you can spread some light on this.
>>
>
> Indeed 2 hypervisors cannot cooperate on the same processor. If Qualcomm
> provides any hypervisor, you would have to remove it.
>
> Although, I don't know much this platform, so I would recommend to contact
> Qualcomm for anything regarding that.
>
> Regards,
>
> --
> Julien Grall
>

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Re: Xen on Qualcomm

[Suresh Kanzariya]

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Hi,

I am trying to run Xen on Qualcomm 410 platform.

I have come across below link
https://lists.xenproject.org/archives/html/xen-devel/2016-03/msg03144.html

which suggest a patch to fix Xen crashes on Qualcomm Technology, So does
anyone has any information on the post support which Qualcomm Platform?

Thanks in advance.

Regards,
Suresh




On Tue, 1 Nov 2016 at 11:48 Suresh Kanzariya <skanzariya@gmail.com> wrote:

> Hi Julien,
>
> Thanks for the information. Let me get some more information on this, and
> I will get back to the mailing-list for further information.
>
> Thanks,
> Suresh
>
> On Mon, Oct 31, 2016 at 8:34 PM, Julien Grall <julien.grall@arm.com>
> wrote:
>
>
>
> On 31/10/16 14:59, Suresh Kanzariya wrote:
>
> Hi Julien,
>
>
> Hi,
>
> It seems that I forgot to add xen-devel on CC in my answer. Sorry for that.
>
> Thanks for the information.
>
> Just wanted to understand that Qualcomm boot itself contains a
> Hypervisor and also Xen is also a hypervisor, so I am not sure Xen
> hypervisor directly fits into the design, I guess Qualcomm hypervisor
> need modification or remove completely to support xen. It will be
> great if you can spread some light on this.
>
>
> Indeed 2 hypervisors cannot cooperate on the same processor. If Qualcomm
> provides any hypervisor, you would have to remove it.
>
> Although, I don't know much this platform, so I would recommend to contact
> Qualcomm for anything regarding that.
>
> Regards,
>
> --
> Julien Grall
>
>
> --
Regards,
Suresh

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Re: Xen on Qualcomm

[Goel, Sameer]

Can you please post the error and details on Xen you are using?

Thanks,
Sameer
On 11/2/2016 3:04 AM, Suresh Kanzariya wrote:
> Hi,
>
> I am trying to run Xen on Qualcomm 410 platform.
>
> I have come across below link
> https://lists.xenproject.org/archives/html/xen-devel/2016-03/msg03144.html
>
> which suggest a patch to fix Xen crashes on Qualcomm Technology, So does
> anyone has any information on the post support which Qualcomm Platform?
>
> Thanks in advance.
>
> Regards,
> Suresh
>
>
>
>
> On Tue, 1 Nov 2016 at 11:48 Suresh Kanzariya <skanzariya@gmail.com
> <mailto:skanzariya@gmail.com>> wrote:
>
>     Hi Julien,
>
>     Thanks for the information. Let me get some more information on
>     this, and I will get back to the mailing-list for further information.
>
>     Thanks,
>     Suresh
>
>     On Mon, Oct 31, 2016 at 8:34 PM, Julien Grall <julien.grall@arm.com
>     <mailto:julien.grall@arm.com>> wrote:
>
>
>
>         On 31/10/16 14:59, Suresh Kanzariya wrote:
>
>             Hi Julien,
>
>
>         Hi,
>
>         It seems that I forgot to add xen-devel on CC in my answer.
>         Sorry for that.
>
>             Thanks for the information.
>
>             Just wanted to understand that Qualcomm boot itself contains a
>             Hypervisor and also Xen is also a hypervisor, so I am not
>             sure Xen
>             hypervisor directly fits into the design, I guess Qualcomm
>             hypervisor
>             need modification or remove completely to support xen. It
>             will be
>             great if you can spread some light on this.
>
>
>         Indeed 2 hypervisors cannot cooperate on the same processor. If
>         Qualcomm provides any hypervisor, you would have to remove it.
>
>         Although, I don't know much this platform, so I would recommend
>         to contact Qualcomm for anything regarding that.
>
>         Regards,
>
>         --
>         Julien Grall
>
>
> --
> Regards,
> Suresh
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> https://lists.xen.org/xen-devel
>

-- 
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.

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Re: Xen on Qualcomm

[Julien Grall]

Hello Sameer,

Please try to retain everyone in CC (or at least the author of the 
e-mail). Otherwise the answer may be delayed. I have added back Suresh.

Regards,

On 02/11/2016 20:37, Goel, Sameer wrote:
>
> Can you please post the error and details on Xen you are using?
>
> Thanks,
> Sameer
> On 11/2/2016 3:04 AM, Suresh Kanzariya wrote:
>> Hi,
>>
>> I am trying to run Xen on Qualcomm 410 platform.
>>
>> I have come across below link
>> https://lists.xenproject.org/archives/html/xen-devel/2016-03/msg03144.html
>>
>>
>> which suggest a patch to fix Xen crashes on Qualcomm Technology, So does
>> anyone has any information on the post support which Qualcomm Platform?
>>
>> Thanks in advance.
>>
>> Regards,
>> Suresh
>>
>>
>>
>>
>> On Tue, 1 Nov 2016 at 11:48 Suresh Kanzariya <skanzariya@gmail.com
>> <mailto:skanzariya@gmail.com>> wrote:
>>
>>     Hi Julien,
>>
>>     Thanks for the information. Let me get some more information on
>>     this, and I will get back to the mailing-list for further
>> information.
>>
>>     Thanks,
>>     Suresh
>>
>>     On Mon, Oct 31, 2016 at 8:34 PM, Julien Grall <julien.grall@arm.com
>>     <mailto:julien.grall@arm.com>> wrote:
>>
>>
>>
>>         On 31/10/16 14:59, Suresh Kanzariya wrote:
>>
>>             Hi Julien,
>>
>>
>>         Hi,
>>
>>         It seems that I forgot to add xen-devel on CC in my answer.
>>         Sorry for that.
>>
>>             Thanks for the information.
>>
>>             Just wanted to understand that Qualcomm boot itself
>> contains a
>>             Hypervisor and also Xen is also a hypervisor, so I am not
>>             sure Xen
>>             hypervisor directly fits into the design, I guess Qualcomm
>>             hypervisor
>>             need modification or remove completely to support xen. It
>>             will be
>>             great if you can spread some light on this.
>>
>>
>>         Indeed 2 hypervisors cannot cooperate on the same processor. If
>>         Qualcomm provides any hypervisor, you would have to remove it.
>>
>>         Although, I don't know much this platform, so I would recommend
>>         to contact Qualcomm for anything regarding that.
>>
>>         Regards,
>>
>>         --
>>         Julien Grall
>>
>>
>> --
>> Regards,
>> Suresh
>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xen.org
>> https://lists.xen.org/xen-devel
>>
>

-- 
Julien Grall

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Re: Xen on Qualcomm

[Suresh Kanzariya]

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Hi Sameer,

I have not build it yet, but before I started building and porting on 410
platform, I just want to make feasibility whether it is possible or not?,
Because as I said earlier Qualcomm uses its own hypervisor that is QHEE, so
just wanted to conform whether 2 hypervisor run simultaneous or not and if
not what are the possible changes are required in xen hypervisor to make it
run on 410 platform.

Also does anyone did it before as the earlier link i shared stats that Xen
crashes on Qualcomm platform, but I don't find any information about the
platform.

So It will be great if someone can spread more lights on this.

My specific questions are below.
1. does xen run on Qualcomm 410 platform? if not what are the reasons and
if it can run what are the possible changes are required?

It will be great if I get some more details on above questions so that I
don't go in wrong direction.

Thank You for your time in advance.

Regards,
Suresh

On Thu, 3 Nov 2016 at 14:35 Julien Grall <julien.grall@arm.com> wrote:

> Hello Sameer,
>
> Please try to retain everyone in CC (or at least the author of the
> e-mail). Otherwise the answer may be delayed. I have added back Suresh.
>
> Regards,
>
> On 02/11/2016 20:37, Goel, Sameer wrote:
> >
> > Can you please post the error and details on Xen you are using?
> >
> > Thanks,
> > Sameer
> > On 11/2/2016 3:04 AM, Suresh Kanzariya wrote:
> >> Hi,
> >>
> >> I am trying to run Xen on Qualcomm 410 platform.
> >>
> >> I have come across below link
> >>
> https://lists.xenproject.org/archives/html/xen-devel/2016-03/msg03144.html
> >>
> >>
> >> which suggest a patch to fix Xen crashes on Qualcomm Technology, So does
> >> anyone has any information on the post support which Qualcomm Platform?
> >>
> >> Thanks in advance.
> >>
> >> Regards,
> >> Suresh
> >>
> >>
> >>
> >>
> >> On Tue, 1 Nov 2016 at 11:48 Suresh Kanzariya <skanzariya@gmail.com
> >> <mailto:skanzariya@gmail.com>> wrote:
> >>
> >>     Hi Julien,
> >>
> >>     Thanks for the information. Let me get some more information on
> >>     this, and I will get back to the mailing-list for further
> >> information.
> >>
> >>     Thanks,
> >>     Suresh
> >>
> >>     On Mon, Oct 31, 2016 at 8:34 PM, Julien Grall <julien.grall@arm.com
> >>     <mailto:julien.grall@arm.com>> wrote:
> >>
> >>
> >>
> >>         On 31/10/16 14:59, Suresh Kanzariya wrote:
> >>
> >>             Hi Julien,
> >>
> >>
> >>         Hi,
> >>
> >>         It seems that I forgot to add xen-devel on CC in my answer.
> >>         Sorry for that.
> >>
> >>             Thanks for the information.
> >>
> >>             Just wanted to understand that Qualcomm boot itself
> >> contains a
> >>             Hypervisor and also Xen is also a hypervisor, so I am not
> >>             sure Xen
> >>             hypervisor directly fits into the design, I guess Qualcomm
> >>             hypervisor
> >>             need modification or remove completely to support xen. It
> >>             will be
> >>             great if you can spread some light on this.
> >>
> >>
> >>         Indeed 2 hypervisors cannot cooperate on the same processor. If
> >>         Qualcomm provides any hypervisor, you would have to remove it.
> >>
> >>         Although, I don't know much this platform, so I would recommend
> >>         to contact Qualcomm for anything regarding that.
> >>
> >>         Regards,
> >>
> >>         --
> >>         Julien Grall
> >>
> >>
> >> --
> >> Regards,
> >> Suresh
> >>
> >>
> >> _______________________________________________
> >> Xen-devel mailing list
> >> Xen-devel@lists.xen.org
> >> https://lists.xen.org/xen-devel
> >>
> >
>
> --
> Julien Grall
>
-- 
Regards,
Suresh

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Re: Xen on Qualcomm

[Suresh Kanzariya]

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Hi Julien/Sameer,

Do you have any updates on this? Your help on my specific questions will
help me to whether should I go ahead or not.

Thank You for your time in advance.

Regards,
Suresh

On Thu, 3 Nov 2016 at 16:09 Suresh Kanzariya <skanzariya@gmail.com> wrote:

> Hi Sameer,
>
> I have not build it yet, but before I started building and porting on 410
> platform, I just want to make feasibility whether it is possible or not?,
> Because as I said earlier Qualcomm uses its own hypervisor that is QHEE, so
> just wanted to conform whether 2 hypervisor run simultaneous or not and if
> not what are the possible changes are required in xen hypervisor to make it
> run on 410 platform.
>
> Also does anyone did it before as the earlier link i shared stats that Xen
> crashes on Qualcomm platform, but I don't find any information about the
> platform.
>
> So It will be great if someone can spread more lights on this.
>
> My specific questions are below.
> 1. does xen run on Qualcomm 410 platform? if not what are the reasons and
> if it can run what are the possible changes are required?
>
> It will be great if I get some more details on above questions so that I
> don't go in wrong direction.
>
> Thank You for your time in advance.
>
> Regards,
> Suresh
>
> On Thu, 3 Nov 2016 at 14:35 Julien Grall <julien.grall@arm.com> wrote:
>
> Hello Sameer,
>
> Please try to retain everyone in CC (or at least the author of the
> e-mail). Otherwise the answer may be delayed. I have added back Suresh.
>
> Regards,
>
> On 02/11/2016 20:37, Goel, Sameer wrote:
> >
> > Can you please post the error and details on Xen you are using?
> >
> > Thanks,
> > Sameer
> > On 11/2/2016 3:04 AM, Suresh Kanzariya wrote:
> >> Hi,
> >>
> >> I am trying to run Xen on Qualcomm 410 platform.
> >>
> >> I have come across below link
> >>
> https://lists.xenproject.org/archives/html/xen-devel/2016-03/msg03144.html
> >>
> >>
> >> which suggest a patch to fix Xen crashes on Qualcomm Technology, So does
> >> anyone has any information on the post support which Qualcomm Platform?
> >>
> >> Thanks in advance.
> >>
> >> Regards,
> >> Suresh
> >>
> >>
> >>
> >>
> >> On Tue, 1 Nov 2016 at 11:48 Suresh Kanzariya <skanzariya@gmail.com
> >> <mailto:skanzariya@gmail.com>> wrote:
> >>
> >>     Hi Julien,
> >>
> >>     Thanks for the information. Let me get some more information on
> >>     this, and I will get back to the mailing-list for further
> >> information.
> >>
> >>     Thanks,
> >>     Suresh
> >>
> >>     On Mon, Oct 31, 2016 at 8:34 PM, Julien Grall <julien.grall@arm.com
> >>     <mailto:julien.grall@arm.com>> wrote:
> >>
> >>
> >>
> >>         On 31/10/16 14:59, Suresh Kanzariya wrote:
> >>
> >>             Hi Julien,
> >>
> >>
> >>         Hi,
> >>
> >>         It seems that I forgot to add xen-devel on CC in my answer.
> >>         Sorry for that.
> >>
> >>             Thanks for the information.
> >>
> >>             Just wanted to understand that Qualcomm boot itself
> >> contains a
> >>             Hypervisor and also Xen is also a hypervisor, so I am not
> >>             sure Xen
> >>             hypervisor directly fits into the design, I guess Qualcomm
> >>             hypervisor
> >>             need modification or remove completely to support xen. It
> >>             will be
> >>             great if you can spread some light on this.
> >>
> >>
> >>         Indeed 2 hypervisors cannot cooperate on the same processor. If
> >>         Qualcomm provides any hypervisor, you would have to remove it.
> >>
> >>         Although, I don't know much this platform, so I would recommend
> >>         to contact Qualcomm for anything regarding that.
> >>
> >>         Regards,
> >>
> >>         --
> >>         Julien Grall
> >>
> >>
> >> --
> >> Regards,
> >> Suresh
> >>
> >>
> >> _______________________________________________
> >> Xen-devel mailing list
> >> Xen-devel@lists.xen.org
> >> https://lists.xen.org/xen-devel
> >>
> >
>
> --
> Julien Grall
>
> --
> Regards,
> Suresh
>
-- 
Regards,
Suresh

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Re: Xen on Qualcomm

[Julien Grall]

On 07/11/16 12:39, Suresh Kanzariya wrote:
> Hi Julien/Sameer,

Hello Suresh,

> On Thu, 3 Nov 2016 at 16:09 Suresh Kanzariya <skanzariya@gmail.com
> <mailto:skanzariya@gmail.com>> wrote:
>     I have not build it yet, but before I started building and porting
>     on 410 platform, I just want to make feasibility whether it is
>     possible or not?, Because as I said earlier Qualcomm uses its own
>     hypervisor that is QHEE, so just wanted to conform whether 2
>     hypervisor run simultaneous or not and if not what are the possible
>     changes are required in xen hypervisor to make it run on 410 platform.

I already answered to this question earlier. It is not possible to run 2 
hypervisors on the same platform. Xen requires virtualization extensions 
so you will have to remove QHEE in order to run Xen.
  However this was a latent bug exacerbate by this platform.
>
>     Also does anyone did it before as the earlier link i shared stats
>     that Xen crashes on Qualcomm platform, but I don't find any
>     information about the platform.

Based on the description of the patch, Xen was crashing on "Qualcomm 
server" platform. I believe that Qualcomm 410 is targeting smartphone.

>
>     So It will be great if someone can spread more lights on this.
>
>     My specific questions are below.
>     1. does xen run on Qualcomm 410 platform? if not what are the
>     reasons and if it can run what are the possible changes are required?

 From a Xen point of view, we only require hardware with virtualization 
extensions (from your previous mail, it seems to be the case). You can 
have more details about porting Xen to a new platform here [1].

Now, the question is whether the software stack allows you to use 
virtualization extensions. I will let Qualcomm answer on this one as I 
don't know the platform.

Regards,

[1] https://schd.ws/hosted_files/xensummit2016/eb/slides.pdf

-- 
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Re: Xen on Qualcomm

[Suresh Kanzariya]

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Hi Julien,

The information will help me a lot. Let me discuss with Qualcomm people
regarding virtualization extensions.

Thank You.

Regards,
Suresh


On Mon, 7 Nov 2016 at 20:54 Julien Grall <julien.grall@arm.com> wrote:

>
>
> On 07/11/16 12:39, Suresh Kanzariya wrote:
> > Hi Julien/Sameer,
>
> Hello Suresh,
>
> > On Thu, 3 Nov 2016 at 16:09 Suresh Kanzariya <skanzariya@gmail.com
> > <mailto:skanzariya@gmail.com>> wrote:
> >     I have not build it yet, but before I started building and porting
> >     on 410 platform, I just want to make feasibility whether it is
> >     possible or not?, Because as I said earlier Qualcomm uses its own
> >     hypervisor that is QHEE, so just wanted to conform whether 2
> >     hypervisor run simultaneous or not and if not what are the possible
> >     changes are required in xen hypervisor to make it run on 410
> platform.
>
> I already answered to this question earlier. It is not possible to run 2
> hypervisors on the same platform. Xen requires virtualization extensions
> so you will have to remove QHEE in order to run Xen.
>   However this was a latent bug exacerbate by this platform.
> >
> >     Also does anyone did it before as the earlier link i shared stats
> >     that Xen crashes on Qualcomm platform, but I don't find any
> >     information about the platform.
>
> Based on the description of the patch, Xen was crashing on "Qualcomm
> server" platform. I believe that Qualcomm 410 is targeting smartphone.
>
> >
> >     So It will be great if someone can spread more lights on this.
> >
> >     My specific questions are below.
> >     1. does xen run on Qualcomm 410 platform? if not what are the
> >     reasons and if it can run what are the possible changes are required?
>
>  From a Xen point of view, we only require hardware with virtualization
> extensions (from your previous mail, it seems to be the case). You can
> have more details about porting Xen to a new platform here [1].
>
> Now, the question is whether the software stack allows you to use
> virtualization extensions. I will let Qualcomm answer on this one as I
> don't know the platform.
>
> Regards,
>
> [1] https://schd.ws/hosted_files/xensummit2016/eb/slides.pdf
>
> --
> Julien Grall
>
-- 
Regards,
Suresh

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