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Subject[PATCH v1 1/3] cpufreq: CPPC: Add cppc_cpufreq_search_cpu_data
Date
cppc_cpufreq_get_cpu_data() allocates a new struct cppc_cpudata
for the input CPU at each call.

To search the struct associated with a cpu without allocating
a new one, add cppc_cpufreq_search_cpu_data().
Also add an early prototype.

This will be used in a later patch, when generating artificial
performance states to register an artificial Energy Model in the
cppc_cpufreq driver and enable the Energy Aware Scheduler for ACPI
based systems.

Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
---
drivers/cpufreq/cppc_cpufreq.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index 82d370ae6a4a..8f950fe72765 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -41,6 +41,8 @@
*/
static LIST_HEAD(cpu_data_list);

+static struct cppc_cpudata *cppc_cpufreq_search_cpu_data(unsigned int cpu);
+
static bool boost_supported;

struct cppc_workaround_oem_info {
@@ -479,6 +481,19 @@ static void cppc_cpufreq_put_cpu_data(struct cpufreq_policy *policy)
policy->driver_data = NULL;
}

+static inline struct cppc_cpudata *
+cppc_cpufreq_search_cpu_data(unsigned int cpu)
+{
+ struct cppc_cpudata *iter, *tmp;
+
+ list_for_each_entry_safe(iter, tmp, &cpu_data_list, node) {
+ if (cpumask_test_cpu(cpu, iter->shared_cpu_map))
+ return iter;
+ }
+
+ return NULL;
+}
+
static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
unsigned int cpu = policy->cpu;
--
2.25.1
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