From: Viresh Kumar <viresh.kumar@linaro.org>
To: Rafael Wysocki <rjw@rjwysocki.net>,
Ionela Voinescu <ionela.voinescu@arm.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>,
linux-pm@vger.kernel.org, Viresh Kumar <viresh.kumar@linaro.org>,
linux-kernel@vger.kernel.org,
Peter Puhov <peter.puhov@linaro.org>,
linux-arm-kernel@lists.infradead.org
Subject: [RFC V2 0/2] cpufreq: cppc: Add support for frequency invariance
Date: Tue, 15 Dec 2020 16:46:34 +0530 [thread overview]
Message-ID: <cover.1608030508.git.viresh.kumar@linaro.org> (raw)
Hello,
CPPC cpufreq driver is used for ARM servers and this patch series tries
to provide frequency invariance support for them.
This is tested with some hacks, as I didn't have access to the right
hardware, on the ARM64 hikey board to check the overall functionality
and that works fine.
Ionela/Peter Puhov, it would be nice if you guys can give this a shot.
This is based of pm/linux-next and patches [1] and [2] which I sent
recently to cleanup arm64 topology stuff.
Changes since V1:
- The interface for setting the callbacks is improved, so different
parts looking to provide their callbacks don't need to think about
each other.
- Moved to per-cpu storage for storing the callback related data, AMU
counters have higher priority with this.
--
viresh
[1] https://lore.kernel.org/lkml/7a171f710cdc0f808a2bfbd7db839c0d265527e7.1607579234.git.viresh.kumar@linaro.org/
[2] https://lore.kernel.org/lkml/5ffc7b9ed03c6301ac2f710f609282959491b526.1608010334.git.viresh.kumar@linaro.org/
Viresh Kumar (2):
topology: Allow multiple entities to provide sched_freq_tick()
callback
cpufreq: cppc: Add support for frequency invariance
arch/arm64/include/asm/topology.h | 8 +-
arch/arm64/kernel/topology.c | 89 +++++++++----------
drivers/base/arch_topology.c | 56 +++++++++++-
drivers/cpufreq/cppc_cpufreq.c | 140 +++++++++++++++++++++++++++++-
include/linux/arch_topology.h | 14 ++-
kernel/sched/core.c | 1 +
6 files changed, 244 insertions(+), 64 deletions(-)
--
2.25.0.rc1.19.g042ed3e048af
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next reply other threads:[~2020-12-15 11:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-15 11:16 Viresh Kumar [this message]
2020-12-15 11:16 ` [RFC V2 1/2] topology: Allow multiple entities to provide sched_freq_tick() callback Viresh Kumar
2021-01-13 16:18 ` Ionela Voinescu
2021-01-15 7:48 ` Viresh Kumar
2021-01-19 19:05 ` Ionela Voinescu
2021-01-22 7:44 ` Viresh Kumar
2020-12-16 19:50 ` [RFC V2 0/2] cpufreq: cppc: Add support for frequency invariance Ionela Voinescu
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