Re: [Xen-devel] Is: drivers/cpufreq/cpufreq-xen.c Was:Re: [PATCH 2 of 2] linux-xencommons: Load processor-passthru

[Dave Jones <davej@xxxxxxxxxx>]

On Tue, Mar 06, 2012 at 12:40:08PM -0500, Konrad Rzeszutek Wilk wrote:

 > I think what you are suggesting is that to write a driver in drivers/cpufreq/
 > that gets either started before the other ones (if built-in) or if as
 > a module gets
 > loaded from xencommons. That driver would then make the call
 > to acpi_processor_preregister_performance(),
 > acpi_processor_register_performance() and acpi_processor_notify_smm().
 > It would function as a cpufreq-scaling driver but
 > in reality all calls to it from cpufreq gov-* drivers would end up with nop.
 > 
 > Dave, would you be Ok with a driver like that in your tree?

I joined this thread half-way through, so I'm not sure what the original 
problem was.
How is a driver that does nothing better than just masking out the cpufreq 
capabilities to guests ?

        Dave


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