diff options
Diffstat (limited to 'kernel/drivers/base/cpu.c')
| -rw-r--r-- | kernel/drivers/base/cpu.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/kernel/drivers/base/cpu.c b/kernel/drivers/base/cpu.c index f160ea44a..91bbb1959 100644 --- a/kernel/drivers/base/cpu.c +++ b/kernel/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" @@ -40,7 +41,7 @@ static void change_cpu_under_node(struct cpu *cpu, cpu->node_id = to_nid; } -static int __ref cpu_subsys_online(struct device *dev) +static int cpu_subsys_online(struct device *dev) { struct cpu *cpu = container_of(dev, struct cpu, dev); int cpuid = dev->id; @@ -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 |