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| author | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2018-06-05 14:42:41 -0700 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-06-06 08:37:52 +0200 |
| commit | aaaece3de9d7709d79004dd5d5aa7c9b366f0675 (patch) | |
| tree | fefb9446852b3afdafba4a83bac0b21e174f9385 /drivers/cpufreq | |
| parent | 52ccc4314293272397b117f3cc6f0f368c81431c (diff) | |
| download | linux-aaaece3de9d7709d79004dd5d5aa7c9b366f0675.tar.gz linux-aaaece3de9d7709d79004dd5d5aa7c9b366f0675.tar.bz2 linux-aaaece3de9d7709d79004dd5d5aa7c9b366f0675.zip | |
cpufreq: intel_pstate: New sysfs entry to control HWP boost
A new attribute is added to intel_pstate sysfs to enable/disable
HWP dynamic performance boost.
Reported-by: Mel Gorman <mgorman@techsingularity.net>
Tested-by: Giovanni Gherdovich <ggherdovich@suse.cz>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 5b2b6b6d1ff4..70bf63bb4e0e 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1033,6 +1033,30 @@ static ssize_t store_min_perf_pct(struct kobject *a, struct attribute *b, return count; } +static ssize_t show_hwp_dynamic_boost(struct kobject *kobj, + struct attribute *attr, char *buf) +{ + return sprintf(buf, "%u\n", hwp_boost); +} + +static ssize_t store_hwp_dynamic_boost(struct kobject *a, struct attribute *b, + const char *buf, size_t count) +{ + unsigned int input; + int ret; + + ret = kstrtouint(buf, 10, &input); + if (ret) + return ret; + + mutex_lock(&intel_pstate_driver_lock); + hwp_boost = !!input; + intel_pstate_update_policies(); + mutex_unlock(&intel_pstate_driver_lock); + + return count; +} + show_one(max_perf_pct, max_perf_pct); show_one(min_perf_pct, min_perf_pct); @@ -1042,6 +1066,7 @@ define_one_global_rw(max_perf_pct); define_one_global_rw(min_perf_pct); define_one_global_ro(turbo_pct); define_one_global_ro(num_pstates); +define_one_global_rw(hwp_dynamic_boost); static struct attribute *intel_pstate_attributes[] = { &status.attr, @@ -1082,6 +1107,11 @@ static void __init intel_pstate_sysfs_expose_params(void) rc = sysfs_create_file(intel_pstate_kobject, &min_perf_pct.attr); WARN_ON(rc); + if (hwp_active) { + rc = sysfs_create_file(intel_pstate_kobject, + &hwp_dynamic_boost.attr); + WARN_ON(rc); + } } /************************** sysfs end ************************/ |