Running 3.9 kernel in domU with 3.11 kernel in dom0

Running 3.9 kernel in domU with 3.11 kernel in dom0

[Gautam Malu]

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Hi,
I am running kernel 3.11-rc3 on arndale exynos 5250 board with xen 4.5
stack. It works fine with domU with kernel 3.17+ with ubutnu.

I am trying to run android as domU, so I am using kernel 3.9 in domU. With
kernel 3.9 in domU, xen doesn't even boot the kernel at all. Here is the
strace log http://pastebin.com/JMtg9mSY

Is this any ABI compatibility issue, as I was reading
http://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions#Hypervisor_ABI_Compatibility

But both dom0 (3.11-rc3)and domU kernel(3.9)  are not patched with this
given patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=380108d891acf8db5cf0d477176c7ed2b62b7928
. So they should be able to interpolate between themselves.

Somehow kernel from arndale-domU-3.9 branch of
http://xenbits.xen.org/git-http/people/julieng/linux-arm.git/ boots with
same setup.

I welcome all your suggestions.



Best regards,
Gautam Malu

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Re: Running 3.9 kernel in domU with 3.11 kernel in dom0

[Julien Grall]

On 30/05/15 14:43, Gautam Malu wrote:
> Hi,

Hello,

It's not necessary to send the same mail twice at one day of interval.
The mail will be answered as soon as we can...

The xen-arm mailing list has been archived few months ago and this
question should be asked on xen-users given it's more a configuration
issue than an hypervisor issue for now.

> I am running kernel 3.11-rc3 on arndale exynos 5250 board with xen 4.5
> stack. It works fine with domU with kernel 3.17+ with ubutnu.
> 
> I am trying to run android as domU, so I am using kernel 3.9 in domU.
> With kernel 3.9 in domU, xen doesn't even boot the kernel at all. Here
> is the strace log http://pastebin.com/JMtg9mSY

I'm afraid that strace xl can't give any useful output for your problem.
It would be more useful to get the log of Xen and xl (xl -vvv create ...).

> 
> Is this any ABI compatibility issue, as I was reading
> http://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions#Hypervisor_ABI_Compatibility
> 
> But both dom0 (3.11-rc3)and domU kernel(3.9)  are not patched with this
> given patch 
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=380108d891acf8db5cf0d477176c7ed2b62b7928 
> . So they should be able to interpolate between themselves.
> 
> Somehow kernel from arndale-domU-3.9 branch of
> http://xenbits.xen.org/git-http/people/julieng/linux-arm.git/ boots with
> same setup.

What do you mean by same setup? Same DOM0? Same Xen? Same kernel config
file? Are you using a android kernel or upstream?

Regards,

-- 
Julien Grall

Running 3.9 kernel in domU with 3.11 kernel in dom0

[Gautam Malu]

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Hi,
I am running kernel 3.11-rc3 on arndale exynos 5250 board with xen 4.5
stack. It works fine with domU with kernel 3.17+ with ubutnu.

I am trying to run android as domU, so I am using kernel 3.9 in domU. With
kernel 3.9 in domU, xen doesn't even boot the kernel at all. Here is the
strace log http://pastebin.com/JMtg9mSY

Is this any ABI compatibility issue, as I was reading
http://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions#Hypervisor_ABI_Compatibility

But both dom0 (3.11-rc3)and domU kernel(3.9)  are not patched with this
given patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=380108d891acf8db5cf0d477176c7ed2b62b7928
. So they should be able to interpolate between themselves.

Somehow kernel from arndale-domU-3.9 branch of
http://xenbits.xen.org/git-http/people/julieng/linux-arm.git/ boots with
same setup.

I welcome all your suggestions.

Best regards,
Gautam Malu

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