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Signed-off-by: Perry Yuan --- drivers/cpufreq/amd-pstate.c | 53 ++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 841b1e2383b8..6958c5fd9e1c 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -786,12 +786,46 @@ static ssize_t show_energy_performance_preference( return sprintf(buf, "%s\n", energy_perf_strings[preference]); } +static void amd_pstate_update_policies(void) +{ + int cpu; + + for_each_possible_cpu(cpu) + cpufreq_update_policy(cpu); +} + +static ssize_t show_pstate_dynamic_boost(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sprintf(buf, "%u\n", cppc_boost); +} + +static ssize_t store_pstate_dynamic_boost(struct kobject *a, + struct kobj_attribute *b, + const char *buf, size_t count) +{ + unsigned int input; + int ret; + + ret = kstrtouint(buf, 10, &input); + if (ret) + return ret; + + mutex_lock(&amd_pstate_driver_lock); + cppc_boost = !!input; + amd_pstate_update_policies(); + mutex_unlock(&amd_pstate_driver_lock); + + return count; +} + cpufreq_freq_attr_ro(amd_pstate_max_freq); cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_freq); cpufreq_freq_attr_ro(amd_pstate_highest_perf); cpufreq_freq_attr_rw(energy_performance_preference); cpufreq_freq_attr_ro(energy_performance_available_preferences); +define_one_global_rw(pstate_dynamic_boost); static struct freq_attr *amd_pstate_attr[] = { &amd_pstate_max_freq, @@ -809,6 +843,15 @@ static struct freq_attr *amd_pstate_epp_attr[] = { NULL, }; +static struct attribute *pstate_global_attributes[] = { + &pstate_dynamic_boost.attr, + NULL +}; + +static const struct attribute_group amd_pstate_global_attr_group = { + .attrs = pstate_global_attributes, +}; + static inline void update_boost_state(void) { u64 misc_en; @@ -1416,6 +1459,16 @@ static int __init amd_pstate_init(void) pr_err("failed to register amd pstate driver with return %d\n", ret); + amd_pstate_kobj = kobject_create_and_add("amd-pstate", &cpu_subsys.dev_root->kobj); + if (!amd_pstate_kobj) + pr_err("amd-pstate: Global sysfs registration failed.\n"); + + ret = sysfs_create_group(amd_pstate_kobj, &amd_pstate_global_attr_group); + if (ret) { + pr_err("amd-pstate: Sysfs attribute export failed with error %d.\n", + ret); + } + return ret; } device_initcall(amd_pstate_init);