linux-kernel - [PATCH v2 0/2] Add support for AArch64 AMUv1-based arch_freq_get_on

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Message-Id: <20231127160838.1403404-1-beata.michalska@arm.com>
Date:   Mon, 27 Nov 2023 16:08:36 +0000
From:   Beata Michalska <beata.michalska@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-pm@...r.kernel.org, sumitg@...dia.com
Cc:     sudeep.holla@....covm, will@...nel.org, catalin.marinas@....com,
        viresh.kumar@...aro.org, rafael@...nel.org,
        ionela.voinescu@....com, yang@...amperecomputing.com,
        linux-tegra@...r.kernel.org
Subject: [PATCH v2 0/2] Add support for AArch64 AMUv1-based arch_freq_get_on_cpu

Introducing AArch64 specific version of arch_freq_get_on_cpu, cashing on
existing implementation for FIE and AMUv1 support.
Additionally wiring it up with cpufreq_verify_current_freq to hopefully
eliminate issues when cpufreq_driver->get() returns frequency that is not
entirely aligned.

The changes have been rather lightly (due to some limitations) tested on
an FVP model.

v2:
- Splitting the patches
- Adding comment for full dyntick mode
- Plugging arch_freq_get_on_cpu into cpufreq_verify_current_freq instead
  of in show_cpuinfo_cur_freq to allow the framework to stay more in sync
  with potential freq changes

[1]
https://lore.kernel.org/lkml/20230606155754.245998-1-beata.michalska@arm.com/


Beata Michalska (1):
  arm64: Provide an AMU-based version of arch_freq_get_on_cpu

Sumit Gupta (1):
  cpufreq: Wire-up arch-flavored freq info into
    cpufreq_verify_current_freq

 arch/arm64/kernel/topology.c | 39 ++++++++++++++++++++++++++++++++++++
 drivers/cpufreq/cpufreq.c    |  3 ++-
 2 files changed, 41 insertions(+), 1 deletion(-)

-- 
2.25.1