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From:   Pierre Gondois <pierre.gondois@arm.com>
To:     linux-kernel@vger.kernel.org
Cc:     Ionela.Voinescu@arm.com, Dietmar.Eggemann@arm.com,
        Pierre Gondois <Pierre.Gondois@arm.com>,
        Pierre Gondois <pierre.gondois@arm.com>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Len Brown <lenb@kernel.org>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        Robert Moore <robert.moore@intel.com>,
        linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org,
        devel@acpica.org
Subject: [PATCH v1 5/5] cpufreq: CPPC: Enable dvfs_possible_from_any_cpu
Date:   Wed, 11 May 2022 15:45:59 +0200
Message-Id: <20220511134559.1466925-5-pierre.gondois@arm.com>
In-Reply-To: <20220511134559.1466925-1-pierre.gondois@arm.com>
References: <20220511134559.1466925-1-pierre.gondois@arm.com>
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From: Pierre Gondois <Pierre.Gondois@arm.com>

The communication mean of the _CPC desired performance can be
PCC, System Memory, System IO, or Functional Fixed Hardware (FFH).

PCC, SystemMemory and SystemIo address spaces are available from any
CPU. Thus, dvfs_possible_from_any_cpu should be enabled in such case.
For FFH, let the FFH implementation do smp_call_function_*() calls.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
---
 drivers/cpufreq/cppc_cpufreq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index 000a0c610c30..ad1535fbf389 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -558,6 +558,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	}
 
 	policy->fast_switch_possible = cppc_allow_fast_switch();
+	policy->dvfs_possible_from_any_cpu = true;
 
 	/*
 	 * If 'highest_perf' is greater than 'nominal_perf', we assume CPU Boost
-- 
2.25.1