Re: [Xen-devel] cpufreq implementation for OMAP under xen hypervisor.

["Vitaly V. Ch" <vitaly.v.ch@xxxxxxxxxxxxx>]

Hi Stefano,

What do you think about implementation cpufreq driver as stub driver domain?

Just now I'm not familar enought with latest XEN fetures so my question can be a little stupid :)

With best regards,

Vitaly

On Tue, Aug 12, 2014 at 3:15 PM, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> wrote:

On Tue, 12 Aug 2014, Oleksandr Dmytryshyn wrote:
> Hi to all.
>
> I want to implement an cpufreq support for OMAP processors in xen. I
> use the Linux kernel as Dom0.
>
> I know that there are 2 implementations of cpufreq: Domain0 based
> cpufreq and Hypervisor based cpufreq. But those implementations are
> made only for x86 architecture, not for the ARM architecture.
>
> Could anybody give me an advise how to do that?

I think that the best way would be to introduce cpufreq support directly
in the Xen hypervisor. I would:

1) get cpufreq (xen/drivers/cpufreq) to build and run on ARM, with a dummy driver
although the cpufreq infrastructure has been written with x86 in mind,
it should be generalizable

2) write a cpufreq driver for OMAP

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