Release 4.12 include/linux/cpu.h
/*
* include/linux/cpu.h - generic cpu definition
*
* This is mainly for topological representation. We define the
* basic 'struct cpu' here, which can be embedded in per-arch
* definitions of processors.
*
* Basic handling of the devices is done in drivers/base/cpu.c
*
* CPUs are exported via sysfs in the devices/system/cpu
* directory.
*/
#ifndef _LINUX_CPU_H_
#define _LINUX_CPU_H_
#include <linux/node.h>
#include <linux/compiler.h>
#include <linux/cpumask.h>
#include <linux/cpuhotplug.h>
struct device;
struct device_node;
struct attribute_group;
struct cpu {
int node_id; /* The node which contains the CPU */
int hotpluggable; /* creates sysfs control file if hotpluggable */
struct device dev;
};
extern void boot_cpu_init(void);
extern void boot_cpu_state_init(void);
extern void cpu_init(void);
extern void trap_init(void);
extern int register_cpu(struct cpu *cpu, int num);
extern struct device *get_cpu_device(unsigned cpu);
extern bool cpu_is_hotpluggable(unsigned cpu);
extern bool arch_match_cpu_phys_id(int cpu, u64 phys_id);
extern bool arch_find_n_match_cpu_physical_id(struct device_node *cpun,
int cpu, unsigned int *thread);
extern int cpu_add_dev_attr(struct device_attribute *attr);
extern void cpu_remove_dev_attr(struct device_attribute *attr);
extern int cpu_add_dev_attr_group(struct attribute_group *attrs);
extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);
extern __printf(4, 5)
struct device *cpu_device_create(struct device *parent, void *drvdata,
const struct attribute_group **groups,
const char *fmt, ...);
#ifdef CONFIG_HOTPLUG_CPU
extern void unregister_cpu(struct cpu *cpu);
extern ssize_t arch_cpu_probe(const char *, size_t);
extern ssize_t arch_cpu_release(const char *, size_t);
#endif
struct notifier_block;
#define CPU_ONLINE 0x0002
/* CPU (unsigned)v is up */
#define CPU_UP_PREPARE 0x0003
/* CPU (unsigned)v coming up */
#define CPU_DEAD 0x0007
/* CPU (unsigned)v dead */
#define CPU_POST_DEAD 0x0009
/* CPU (unsigned)v dead, cpu_hotplug
* lock is dropped */
#define CPU_BROKEN 0x000B
/* CPU (unsigned)v did not die properly,
* perhaps due to preemption. */
/* Used for CPU hotplug events occurring while tasks are frozen due to a suspend
* operation in progress
*/
#define CPU_TASKS_FROZEN 0x0010
#define CPU_ONLINE_FROZEN (CPU_ONLINE | CPU_TASKS_FROZEN)
#define CPU_UP_PREPARE_FROZEN (CPU_UP_PREPARE | CPU_TASKS_FROZEN)
#define CPU_UP_CANCELED_FROZEN (CPU_UP_CANCELED | CPU_TASKS_FROZEN)
#define CPU_DOWN_PREPARE_FROZEN (CPU_DOWN_PREPARE | CPU_TASKS_FROZEN)
#define CPU_DOWN_FAILED_FROZEN (CPU_DOWN_FAILED | CPU_TASKS_FROZEN)
#define CPU_DEAD_FROZEN (CPU_DEAD | CPU_TASKS_FROZEN)
#ifdef CONFIG_SMP
extern bool cpuhp_tasks_frozen;
int cpu_up(unsigned int cpu);
void notify_cpu_starting(unsigned int cpu);
extern void cpu_maps_update_begin(void);
extern void cpu_maps_update_done(void);
#else /* CONFIG_SMP */
#define cpuhp_tasks_frozen 0
static inline void cpu_maps_update_begin(void)
{
}
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static inline void cpu_maps_update_done(void)
{
}
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#endif /* CONFIG_SMP */
extern struct bus_type cpu_subsys;
#ifdef CONFIG_HOTPLUG_CPU
/* Stop CPUs going up and down. */
extern void cpu_hotplug_begin(void);
extern void cpu_hotplug_done(void);
extern void get_online_cpus(void);
extern void put_online_cpus(void);
extern void cpu_hotplug_disable(void);
extern void cpu_hotplug_enable(void);
void clear_tasks_mm_cpumask(int cpu);
int cpu_down(unsigned int cpu);
#else /* CONFIG_HOTPLUG_CPU */
static inline void cpu_hotplug_begin(void) {}
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static inline void cpu_hotplug_done(void) {}
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#define get_online_cpus() do { } while (0)
#define put_online_cpus() do { } while (0)
#define cpu_hotplug_disable() do { } while (0)
#define cpu_hotplug_enable() do { } while (0)
#endif /* CONFIG_HOTPLUG_CPU */
#ifdef CONFIG_PM_SLEEP_SMP
extern int freeze_secondary_cpus(int primary);
static inline int disable_nonboot_cpus(void)
{
return freeze_secondary_cpus(0);
}
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extern void enable_nonboot_cpus(void);
#else /* !CONFIG_PM_SLEEP_SMP */
static inline int disable_nonboot_cpus(void) { return 0; }
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static inline void enable_nonboot_cpus(void) {}
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#endif /* !CONFIG_PM_SLEEP_SMP */
void cpu_startup_entry(enum cpuhp_state state);
void cpu_idle_poll_ctrl(bool enable);
/* Attach to any functions which should be considered cpuidle. */
#define __cpuidle __attribute__((__section__(".cpuidle.text")))
bool cpu_in_idle(unsigned long pc);
void arch_cpu_idle(void);
void arch_cpu_idle_prepare(void);
void arch_cpu_idle_enter(void);
void arch_cpu_idle_exit(void);
void arch_cpu_idle_dead(void);
int cpu_report_state(int cpu);
int cpu_check_up_prepare(int cpu);
void cpu_set_state_online(int cpu);
void play_idle(unsigned long duration_ms);
#ifdef CONFIG_HOTPLUG_CPU
bool cpu_wait_death(unsigned int cpu, int seconds);
bool cpu_report_death(void);
void cpuhp_report_idle_dead(void);
#else
static inline void cpuhp_report_idle_dead(void) { }
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#endif /* #ifdef CONFIG_HOTPLUG_CPU */
#endif /* _LINUX_CPU_H_ */
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| Thomas Gleixner | 87 | 13.20% | 6 | 12.24% |
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| Paul E. McKenney | 48 | 7.28% | 1 | 2.04% |
| Rafael J. Wysocki | 41 | 6.22% | 2 | 4.08% |
| Andrew Morton | 41 | 6.22% | 4 | 8.16% |
| Rusty Russell | 35 | 5.31% | 4 | 8.16% |
| Christian Krafft | 33 | 5.01% | 1 | 2.04% |
| Sudeep Holla | 32 | 4.86% | 1 | 2.04% |
| Toshi Kani | 30 | 4.55% | 1 | 2.04% |
| Oleg Nesterov | 29 | 4.40% | 1 | 2.04% |
| Srivatsa S. Bhat | 24 | 3.64% | 1 | 2.04% |
| Nathan Fontenot | 22 | 3.34% | 1 | 2.04% |
| David S. Miller | 21 | 3.19% | 1 | 2.04% |
| Ashok Raj | 20 | 3.03% | 3 | 6.12% |
| James Morse | 18 | 2.73% | 1 | 2.04% |
| Ingo Molnar | 16 | 2.43% | 2 | 4.08% |
| Len Brown | 14 | 2.12% | 1 | 2.04% |
| Chris Metcalf | 13 | 1.97% | 1 | 2.04% |
| Kay Sievers | 12 | 1.82% | 1 | 2.04% |
| Sudeep KarkadaNagesha | 11 | 1.67% | 1 | 2.04% |
| Patrick Mochel | 9 | 1.37% | 1 | 2.04% |
| Manfred Spraul | 8 | 1.21% | 1 | 2.04% |
| Josh Triplett | 8 | 1.21% | 1 | 2.04% |
| Peter Zijlstra | 8 | 1.21% | 1 | 2.04% |
| Anton Vorontsov | 7 | 1.06% | 1 | 2.04% |
| Gautham R. Shenoy | 6 | 0.91% | 2 | 4.08% |
| Nicolas Iooss | 4 | 0.61% | 1 | 2.04% |
| Kamezawa Hiroyuki | 3 | 0.46% | 1 | 2.04% |
| Jonathan Corbet | 3 | 0.46% | 1 | 2.04% |
| Paul Gortmaker | 3 | 0.46% | 1 | 2.04% |
| Suresh B. Siddha | 2 | 0.30% | 1 | 2.04% |
| Robert P. J. Day | 1 | 0.15% | 1 | 2.04% |
| Ralf Bächle | 1 | 0.15% | 1 | 2.04% |
| Total | 659 | 100.00% | 49 | 100.00% |
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