From: Viresh Kumar <viresh.kumar@linaro.org>
To: Ionela Voinescu <ionela.voinescu@arm.com>
Cc: rjw@rjwysocki.net, lenb@kernel.org, sudeep.holla@arm.com,
morten.rasmussen@arm.com, jeremy.linton@arm.com,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 6/8] cppc_cpufreq: clarify support for coordination types
Date: Mon, 9 Nov 2020 12:37:02 +0530 [thread overview]
Message-ID: <20201109070702.2hod2xh7fddobnkl@vireshk-i7> (raw)
In-Reply-To: <20201105125524.4409-7-ionela.voinescu@arm.com>
On 05-11-20, 12:55, Ionela Voinescu wrote:
> The previous coordination type handling in the cppc_cpufreq init code
> created some confusion: the comment mentioned "Support only SW_ANY for
> now" while only the SW_ALL/ALL case resulted in a failure. The other
> coordination types (HW_ALL/HW, NONE) were silently supported.
>
> Clarify support for coordination types while describing in comments the
> intended behavior.
>
> Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
> Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
> Cc: Viresh Kumar <viresh.kumar@linaro.org>
> ---
> drivers/cpufreq/cppc_cpufreq.c | 19 +++++++++++++++----
> 1 file changed, 15 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
> index fd2daeb59b49..60ac7f8049b5 100644
> --- a/drivers/cpufreq/cppc_cpufreq.c
> +++ b/drivers/cpufreq/cppc_cpufreq.c
> @@ -363,11 +363,22 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
> policy->transition_delay_us = cppc_cpufreq_get_transition_delay_us(cpu);
> policy->shared_type = domain->shared_type;
>
> - if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) {
> + switch (policy->shared_type) {
> + case CPUFREQ_SHARED_TYPE_HW:
> + case CPUFREQ_SHARED_TYPE_NONE:
> + /* Nothing to be done - we'll have a policy for each CPU */
> + break;
> + case CPUFREQ_SHARED_TYPE_ANY:
> + /*
> + * All CPUs in the domain will share a policy and all cpufreq
> + * operations will use a single cppc_cpudata structure stored
> + * in policy->driver_data.
> + */
> cpumask_copy(policy->cpus, domain->shared_cpu_map);
> - } else if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL) {
> - /* Support only SW_ANY for now. */
> - pr_debug("Unsupported CPU co-ord type\n");
> + break;
> + default:
> + pr_info("Unsupported cpufreq CPU co-ord type: %d\n",
> + policy->shared_type);
> return -EFAULT;
> }
>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
--
viresh
next prev parent reply other threads:[~2020-11-09 7:07 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-05 12:55 [PATCH 0/8] cppc_cpufreq: fix, clarify and improve support Ionela Voinescu
2020-11-05 12:55 ` [PATCH 1/8] cppc_cpufreq: fix misspelling, code style and readability issues Ionela Voinescu
2020-11-09 6:58 ` Viresh Kumar
2020-11-05 12:55 ` [PATCH 2/8] cppc_cpufreq: clean up cpu, cpu_num and cpunum variable use Ionela Voinescu
2020-11-09 6:59 ` Viresh Kumar
2020-11-05 12:55 ` [PATCH 3/8] cppc_cpufreq: simplify use of performance capabilities Ionela Voinescu
2020-11-09 7:01 ` Viresh Kumar
2020-11-05 12:55 ` [PATCH 4/8] cppc_cpufreq: replace per-cpu structures with lists Ionela Voinescu
2020-11-05 15:50 ` Jeremy Linton
2020-11-05 17:00 ` Ionela Voinescu
2020-11-05 12:55 ` [PATCH 5/8] cppc_cpufreq: use policy->cpu as driver of frequency setting Ionela Voinescu
2020-11-09 7:05 ` Viresh Kumar
2020-11-05 12:55 ` [PATCH 6/8] cppc_cpufreq: clarify support for coordination types Ionela Voinescu
2020-11-09 7:07 ` Viresh Kumar [this message]
2020-11-05 12:55 ` [PATCH 7/8] cppc_cpufreq: expose information on frequency domains Ionela Voinescu
2020-11-09 7:09 ` Viresh Kumar
2020-11-05 12:55 ` [PATCH 8/8] acpi: fix NONE coordination for domain mapping failure Ionela Voinescu
2020-11-05 13:05 ` Rafael J. Wysocki
2020-11-05 14:02 ` Ionela Voinescu
2020-11-05 14:47 ` Rafael J. Wysocki
2020-11-09 7:10 ` Viresh Kumar
2020-11-17 14:59 ` [PATCH 0/8] cppc_cpufreq: fix, clarify and improve support Rafael J. Wysocki
2020-11-17 15:32 ` Ionela Voinescu
2020-11-17 16:30 ` Rafael J. Wysocki
2020-11-17 19:04 ` Ionela Voinescu
2020-11-17 18:49 ` [PATCH] cppc_cpufreq: optimise memory allocation for HW and NONE coordination Ionela Voinescu
2020-11-23 17:32 ` Rafael J. Wysocki
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