[PATCH v6 7/7] arm64/amu: Use capacity_ref_freq to set AMU ratio

[Will Deacon]

On Thu, Nov 09, 2023 at 11:14:38AM +0100, Vincent Guittot wrote:
> Use the new capacity_ref_freq to set the ratio that is used by AMU for
> computing the arch_scale_freq_capacity().
> This helps to keep everything aligned using the same reference for
> computing CPUs capacity.
> 
> The default value of the ratio (stored in per_cpu(arch_max_freq_scale))
> ensures that arch_scale_freq_capacity() returns max capacity until it is
> set to its correct value with the cpu capacity and capacity_ref_freq.
> 
> Signed-off-by: Vincent Guittot <vincent.guittot at linaro.org>
> Acked-by: Sudeep Holla <sudeep.holla at arm.com>
> ---
>  arch/arm64/kernel/topology.c  | 26 +++++++++++++-------------
>  drivers/base/arch_topology.c  | 12 +++++++++++-
>  include/linux/arch_topology.h |  1 +
>  3 files changed, 25 insertions(+), 14 deletions(-)

Acked-by: Will Deacon <will at kernel.org>

Will