struct cpu *cpu = container_of(dev, struct cpu, sysdev);
ssize_t ret;
+ cpu_hotplug_driver_lock();
switch (buf[0]) {
case '0':
ret = cpu_down(cpu->sysdev.id);
default:
ret = -EINVAL;
}
+ cpu_hotplug_driver_unlock();
if (ret >= 0)
ret = count;
per_cpu(cpu_sys_devices, logical_cpu) = NULL;
return;
}
+
+#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
+static ssize_t cpu_probe_store(struct class *class, const char *buf,
+ size_t count)
+{
+ return arch_cpu_probe(buf, count);
+}
+
+static ssize_t cpu_release_store(struct class *class, const char *buf,
+ size_t count)
+{
+ return arch_cpu_release(buf, count);
+}
+
+static CLASS_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
+static CLASS_ATTR(release, S_IWUSR, NULL, cpu_release_store);
+
+int __init cpu_probe_release_init(void)
+{
+ int rc;
+
+ rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
+ &class_attr_probe.attr);
+ if (!rc)
+ rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
+ &class_attr_release.attr);
+
+ return rc;
+}
+device_initcall(cpu_probe_release_init);
+#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
+
#else /* ... !CONFIG_HOTPLUG_CPU */
static inline void register_cpu_control(struct cpu *cpu)
{
* boot up and this data does not change there after. Hence this
* operation should be safe. No locking required.
*/
- addr = __pa(per_cpu_ptr(crash_notes, cpunum));
+ addr = per_cpu_ptr_to_phys(per_cpu_ptr(crash_notes, cpunum));
rc = sprintf(buf, "%Lx\n", addr);
return rc;
}
/*
* Print cpu online, possible, present, and system maps
*/
-static ssize_t print_cpus_map(char *buf, cpumask_t *map)
+
+struct cpu_attr {
+ struct sysdev_class_attribute attr;
+ const struct cpumask *const * const map;
+};
+
+static ssize_t show_cpus_attr(struct sysdev_class *class,
+ struct sysdev_class_attribute *attr,
+ char *buf)
{
- int n = cpulist_scnprintf(buf, PAGE_SIZE-2, *map);
+ struct cpu_attr *ca = container_of(attr, struct cpu_attr, attr);
+ int n = cpulist_scnprintf(buf, PAGE_SIZE-2, *(ca->map));
buf[n++] = '\n';
buf[n] = '\0';
return n;
}
-#define print_cpus_func(type) \
-static ssize_t print_cpus_##type(struct sysdev_class *class, char *buf) \
-{ \
- return print_cpus_map(buf, &cpu_##type##_map); \
-} \
-static struct sysdev_class_attribute attr_##type##_map = \
- _SYSDEV_CLASS_ATTR(type, 0444, print_cpus_##type, NULL)
+#define _CPU_ATTR(name, map) \
+ { _SYSDEV_CLASS_ATTR(name, 0444, show_cpus_attr, NULL), map }
+
+static struct cpu_attr cpu_attrs[] = {
+ _CPU_ATTR(online, &cpu_online_mask),
+ _CPU_ATTR(possible, &cpu_possible_mask),
+ _CPU_ATTR(present, &cpu_present_mask),
+};
-print_cpus_func(online);
-print_cpus_func(possible);
-print_cpus_func(present);
+/*
+ * Print values for NR_CPUS and offlined cpus
+ */
+static ssize_t print_cpus_kernel_max(struct sysdev_class *class,
+ struct sysdev_class_attribute *attr, char *buf)
+{
+ int n = snprintf(buf, PAGE_SIZE-2, "%d\n", NR_CPUS - 1);
+ return n;
+}
+static SYSDEV_CLASS_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL);
+
+/* arch-optional setting to enable display of offline cpus >= nr_cpu_ids */
+unsigned int total_cpus;
+
+static ssize_t print_cpus_offline(struct sysdev_class *class,
+ struct sysdev_class_attribute *attr, char *buf)
+{
+ int n = 0, len = PAGE_SIZE-2;
+ cpumask_var_t offline;
+
+ /* display offline cpus < nr_cpu_ids */
+ if (!alloc_cpumask_var(&offline, GFP_KERNEL))
+ return -ENOMEM;
+ cpumask_complement(offline, cpu_online_mask);
+ n = cpulist_scnprintf(buf, len, offline);
+ free_cpumask_var(offline);
+
+ /* display offline cpus >= nr_cpu_ids */
+ if (total_cpus && nr_cpu_ids < total_cpus) {
+ if (n && n < len)
+ buf[n++] = ',';
+
+ if (nr_cpu_ids == total_cpus-1)
+ n += snprintf(&buf[n], len - n, "%d", nr_cpu_ids);
+ else
+ n += snprintf(&buf[n], len - n, "%d-%d",
+ nr_cpu_ids, total_cpus-1);
+ }
+
+ n += snprintf(&buf[n], len - n, "\n");
+ return n;
+}
+static SYSDEV_CLASS_ATTR(offline, 0444, print_cpus_offline, NULL);
static struct sysdev_class_attribute *cpu_state_attr[] = {
- &attr_online_map,
- &attr_possible_map,
- &attr_present_map,
+ &cpu_attrs[0].attr,
+ &cpu_attrs[1].attr,
+ &cpu_attrs[2].attr,
+ &attr_kernel_max,
+ &attr_offline,
};
static int cpu_states_init(void)