Development tree for Cortex-A15?
Jemma Jones
jemmajones81 at yahoo.co.uk
Fri May 4 04:44:07 EDT 2012
> Subject: Re: Development tree for Cortex-A15?
>
> On Thu, 3 May 2012 14:35:55 +0100 (BST), Jemma Jones
> <jemmajones81 at yahoo.co.uk> wrote:
>>> Subject: Re: Development tree for Cortex-A15?
>>
>>>
>>> On Thu, 3 May 2012 12:56:39 +0100 (BST), Jemma Jones
>>> <jemmajones81 at yahoo.co.uk> wrote:
>>>
>>> Hi Jemma,
>>>
>>>> Hi, I'm looking for the latest KVM-enabled developer version
> of the
>>> Linux
>>>> kernel for ARM on the Versatile Express board with the Cortex-A15
>>>> CPU.
>>>
>>> It really depends on what you call "developer version". As
> far as I
>>> know,
>>> there is nothing but dev trees around ;-).
>>>
>>>> I have pulled from these two trees
>>>>
>>>>
>>>
> http://git.kernel.org/?p=linux/kernel/git/cmarinas/linux-arm-arch.git;a=summary
>>>>
>>>
> http://git.kernel.org/?p=linux/kernel/git/maz/arm-platforms.git;a=summary
>>>>
>>>> But it seems the 2nd one is more up-to-date with KVM enablement
> while
>>>> it
>>>> doesn't have any support for the A15 VE board? And the 1st one
>
>>> doesn't
>>>> support KVM on ARM with the ARMv7 virtualization extensions?
>>>
>>> First, my tree (the second one) does support the A15. Otherwise I'd
> have
>>> a
>>> hard time testing my own code... Which branch are you looking at?
> Please
>>> note that the KVM branches in this tree are under heavy development,
> and
>>> are only suitable if you don't mind frequent rebases and regular
> breakage
>>> due to bleeding edge code.
>>
>> I'm currently on kvm-arm-v7-ael, because it looked like the most
>> up-to-date one. Which one should I be using for Cortex-A15 support?
>
> That branch is good enough, if you have a bleeding edge QEMU. Note that
> the VE A15 support in that tree is DT only. I'm working on a v3.4 based one
> at the moment, but that's not completely ready yet.
I'm just a little confused because under arch/arm/mach-vexpress/ there is no A15 tile? On the virtualopensystems.com git (which you quote above) you had to explicitly enable the board and it would show up in the .config as CONFIG_ARCH_VEXPRESS_CA15X4. Is that not the case anymore in your kernel tree?
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