[PATCH v2 3/4] cpufreq: CPPC: Fix wrong max_freq in policy initialization
From: Lifeng Zheng
Date: Fri Jan 17 2025 - 05:15:17 EST
In policy initialization, policy->max and policy->cpuinfo.max_freq always
set to the value calculated from caps->nominal_perf. This will cause the
frequency stay on base frequency even if the policy is already boosted when
a CPU is going online. Fix this by using policy->boost_enabled to determine
which value should be set.
Signed-off-by: Lifeng Zheng <zhenglifeng1@xxxxxxxxxx>
---
drivers/cpufreq/cppc_cpufreq.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index bd8f75accfa0..7fa89b601d2a 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -611,7 +611,8 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
* Section 8.4.7.1.1.5 of ACPI 6.1 spec)
*/
policy->min = cppc_perf_to_khz(caps, caps->lowest_nonlinear_perf);
- policy->max = cppc_perf_to_khz(caps, caps->nominal_perf);
+ policy->max = cppc_perf_to_khz(caps, policy->boost_enabled ?
+ caps->highest_perf : caps->nominal_perf);
/*
* Set cpuinfo.min_freq to Lowest to make the full range of performance
@@ -619,7 +620,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
* nonlinear perf
*/
policy->cpuinfo.min_freq = cppc_perf_to_khz(caps, caps->lowest_perf);
- policy->cpuinfo.max_freq = cppc_perf_to_khz(caps, caps->nominal_perf);
+ policy->cpuinfo.max_freq = policy->max;
policy->transition_delay_us = cppc_cpufreq_get_transition_delay_us(cpu);
policy->shared_type = cpu_data->shared_type;
--
2.33.0