Messages in this thread Patch in this message | | | From | Perry Yuan <> | Subject | [PATCH v4 7/9] cpufreq: amd-pstate: add frequency dynamic boost sysfs control | Date | Fri, 11 Nov 2022 01:58:45 +0800 |
| |
Add one sysfs entry to control the CPU cores frequency boost state The attribute file can allow user to set max performance boosted or keeping at normal perf level.
Signed-off-by: Perry Yuan <Perry.Yuan@amd.com> --- drivers/cpufreq/amd-pstate.c | 66 ++++++++++++++++++++++++++++++++++-- 1 file changed, 64 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 645706d65173..b71bfbbb7639 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -765,12 +765,46 @@ 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_boost(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sprintf(buf, "%u\n", cppc_boost); +} + +static ssize_t store_boost(struct kobject *a, + struct kobj_attribute *b, + const char *buf, size_t count) +{ + bool new_state; + int ret; + + ret = kstrtobool(buf, &new_state); + if (ret) + return -EINVAL; + + mutex_lock(&amd_pstate_driver_lock); + cppc_boost = !!new_state; + 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(boost); static struct freq_attr *amd_pstate_attr[] = { &amd_pstate_max_freq, @@ -788,6 +822,15 @@ static struct freq_attr *amd_pstate_epp_attr[] = { NULL, }; +static struct attribute *pstate_global_attributes[] = { + &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; @@ -1398,9 +1441,28 @@ static int __init amd_pstate_init(void) ret = cpufreq_register_driver(default_pstate_driver); if (ret) - pr_err("failed to register amd pstate driver with return %d\n", - ret); + pr_err("failed to register driver with return %d\n", ret); + + amd_pstate_kobj = kobject_create_and_add("amd-pstate", &cpu_subsys.dev_root->kobj); + if (!amd_pstate_kobj) { + ret = -EINVAL; + pr_err("global sysfs registration failed.\n"); + goto kobject_free; + } + + ret = sysfs_create_group(amd_pstate_kobj, &amd_pstate_global_attr_group); + if (ret) { + pr_err("sysfs attribute export failed with error %d.\n", ret); + goto global_attr_free; + } + + return ret; +global_attr_free: + kobject_put(amd_pstate_kobj); +kobject_free: + kfree(cpudata); + cpufreq_unregister_driver(default_pstate_driver); return ret; } device_initcall(amd_pstate_init); -- 2.34.1
| |