1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index f160ea44a86d..78720e706176 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -16,6 +16,7 @@
 #include <linux/acpi.h>
 #include <linux/of.h>
 #include <linux/cpufeature.h>
+#include <linux/tick.h>
 
 #include "base.h"
 
@@ -265,6 +266,30 @@ static ssize_t print_cpus_offline(struct device *dev,
 }
 static DEVICE_ATTR(offline, 0444, print_cpus_offline, NULL);
 
+static ssize_t print_cpus_isolated(struct device *dev,
+                                  struct device_attribute *attr, char *buf)
+{
+        int n = 0, len = PAGE_SIZE-2;
+
+        n = scnprintf(buf, len, "%*pbl\n", cpumask_pr_args(cpu_isolated_map));
+
+        return n;
+}
+static DEVICE_ATTR(isolated, 0444, print_cpus_isolated, NULL);
+
+#ifdef CONFIG_NO_HZ_FULL
+static ssize_t print_cpus_nohz_full(struct device *dev,
+                                  struct device_attribute *attr, char *buf)
+{
+        int n = 0, len = PAGE_SIZE-2;
+
+        n = scnprintf(buf, len, "%*pbl\n", cpumask_pr_args(tick_nohz_full_mask));
+
+        return n;
+}
+static DEVICE_ATTR(nohz_full, 0444, print_cpus_nohz_full, NULL);
+#endif
+
 static void cpu_device_release(struct device *dev)
 {
         /*
@@ -431,6 +456,10 @@ static struct attribute *cpu_root_attrs[] = {
         &cpu_attrs[2].attr.attr,
         &dev_attr_kernel_max.attr,
         &dev_attr_offline.attr,
+        &dev_attr_isolated.attr,
+#ifdef CONFIG_NO_HZ_FULL
+        &dev_attr_nohz_full.attr,
+#endif
 #ifdef CONFIG_GENERIC_CPU_AUTOPROBE
         &dev_attr_modalias.attr,
 #endif