[PATCH v1 5/5] cpufreq: CPPC: Enable dvfs_possible_from_any_cpu

From: Pierre Gondois
Date: Wed May 11 2022 - 09:47:19 EST


From: Pierre Gondois <Pierre.Gondois@xxxxxxx>

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@xxxxxxx>
---
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