Re: [PATCH v1 4/5] cpufreq: CPPC: Enable fast_switch

[Viresh Kumar]

On 11-05-22, 15:45, Pierre Gondois wrote:
> From: Pierre Gondois <Pierre.Gondois@xxxxxxx>
> 
> The communication mean of the _CPC desired performance can be
> PCC, System Memory, System IO, or Functional Fixed Hardware.
> 
> commit b7898fda5bc7 ("cpufreq: Support for fast frequency switching")
> fast_switching is 'for switching CPU frequencies from interrupt
> context'.
> Writes to SystemMemory and SystemIo are fast and suitable this.
> This is not the case for PCC and might not be the case for FFH.
> 
> Enable fast_switching for the cppc_cpufreq driver in above cases.
> 
> Add cppc_allow_fast_switch() to check the desired performance
> register address space and set fast_switching accordingly.
> 
> Signed-off-by: Pierre Gondois <pierre.gondois@xxxxxxx>
> ---
>  drivers/acpi/cppc_acpi.c       | 17 +++++++++++++++++
>  drivers/cpufreq/cppc_cpufreq.c | 24 ++++++++++++++++++++++++
>  include/acpi/cppc_acpi.h       |  5 +++++
>  3 files changed, 46 insertions(+)

Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>

-- 
viresh