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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-05-12 16:15:48 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-05-21 18:44:55 +0200
commitc3d175e4852bfdfd1e4021dff8715fc407dedd98 (patch)
treece38a274cfc675304fedc4c5bea5d6cb751ebb54 /drivers/cpufreq/intel_pstate.c
parentd07f6ca923ea0927a1024dfccafc5b53b61cfecc (diff)
downloadlinux-c3d175e4852bfdfd1e4021dff8715fc407dedd98.tar.bz2
cpufreq: intel_pstate: hybrid: Avoid exposing two global attributes
The turbo_pct and num_pstates sysfs attributes represent CPU properties that may be different for differenty types of CPUs in a hybrid processor, so avoid exposing them in that case. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/intel_pstate.c')
-rw-r--r--drivers/cpufreq/intel_pstate.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 0e69dffd5a76..45f59e2827fe 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -1365,8 +1365,6 @@ define_one_global_rw(energy_efficiency);
static struct attribute *intel_pstate_attributes[] = {
&status.attr,
&no_turbo.attr,
- &turbo_pct.attr,
- &num_pstates.attr,
NULL
};
@@ -1391,6 +1389,14 @@ static void __init intel_pstate_sysfs_expose_params(void)
if (WARN_ON(rc))
return;
+ if (!boot_cpu_has(X86_FEATURE_HYBRID_CPU)) {
+ rc = sysfs_create_file(intel_pstate_kobject, &turbo_pct.attr);
+ WARN_ON(rc);
+
+ rc = sysfs_create_file(intel_pstate_kobject, &num_pstates.attr);
+ WARN_ON(rc);
+ }
+
/*
* If per cpu limits are enforced there are no global limits, so
* return without creating max/min_perf_pct attributes
@@ -1417,6 +1423,11 @@ static void __init intel_pstate_sysfs_remove(void)
sysfs_remove_group(intel_pstate_kobject, &intel_pstate_attr_group);
+ if (!boot_cpu_has(X86_FEATURE_HYBRID_CPU)) {
+ sysfs_remove_file(intel_pstate_kobject, &num_pstates.attr);
+ sysfs_remove_file(intel_pstate_kobject, &turbo_pct.attr);
+ }
+
if (!per_cpu_limits) {
sysfs_remove_file(intel_pstate_kobject, &max_perf_pct.attr);
sysfs_remove_file(intel_pstate_kobject, &min_perf_pct.attr);