Release 4.14 include/linux/cpu.h

Directory: include/linux
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * 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)
{
}

Contributors
Person Tokens Prop Commits CommitProp
Oleg Nesterov 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%



static inline void cpu_maps_update_done(void)
{
}

Contributors
Person Tokens Prop Commits CommitProp
Oleg Nesterov 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%

#endif /* CONFIG_SMP */
extern struct bus_type cpu_subsys;

#ifdef CONFIG_HOTPLUG_CPU
extern void cpus_write_lock(void);
extern void cpus_write_unlock(void);
extern void cpus_read_lock(void);
extern void cpus_read_unlock(void);
extern void lockdep_assert_cpus_held(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 cpus_write_lock(void) { }
Contributors
Person Tokens Prop Commits CommitProp
Toshi Kani 6 75.00% 1 50.00%
Thomas Gleixner 2 25.00% 1 50.00%
Total 8 100.00% 2 100.00%



static inline void cpus_write_unlock(void) { }
Contributors
Person Tokens Prop Commits CommitProp
Toshi Kani 6 75.00% 1 50.00%
Thomas Gleixner 2 25.00% 1 50.00%
Total 8 100.00% 2 100.00%



static inline void cpus_read_lock(void) { }
Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%



static inline void cpus_read_unlock(void) { }
Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%



static inline void lockdep_assert_cpus_held(void) { }
Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%



static inline void cpu_hotplug_disable(void) { }
Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 7 87.50% 1 50.00%
Srivatsa S. Bhat 1 12.50% 1 50.00%
Total 8 100.00% 2 100.00%



static inline void cpu_hotplug_enable(void) { }
Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 7 87.50% 1 50.00%
Srivatsa S. Bhat 1 12.50% 1 50.00%
Total 8 100.00% 2 100.00%

#endif	/* !CONFIG_HOTPLUG_CPU */

/* Wrappers which go away once all code is converted */


static inline void cpu_hotplug_begin(void) { cpus_write_lock(); }
Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 12 100.00% 1 100.00%
Total 12 100.00% 1 100.00%



static inline void cpu_hotplug_done(void) { cpus_write_unlock(); }
Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 12 100.00% 1 100.00%
Total 12 100.00% 1 100.00%



static inline void get_online_cpus(void) { cpus_read_lock(); }
Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 12 100.00% 1 100.00%
Total 12 100.00% 1 100.00%



static inline void put_online_cpus(void) { cpus_read_unlock(); }

Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 12 100.00% 1 100.00%
Total 12 100.00% 1 100.00%

#ifdef CONFIG_PM_SLEEP_SMP
extern int freeze_secondary_cpus(int primary);


static inline int disable_nonboot_cpus(void)
{
	return freeze_secondary_cpus(0);
}
Contributors
Person Tokens Prop Commits CommitProp
James Morse 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%

extern void enable_nonboot_cpus(void);
#else /* !CONFIG_PM_SLEEP_SMP */


static inline int disable_nonboot_cpus(void) { return 0; }
Contributors
Person Tokens Prop Commits CommitProp
Rafael J. Wysocki 12 100.00% 1 100.00%
Total 12 100.00% 1 100.00%



static inline void enable_nonboot_cpus(void) {}
Contributors
Person Tokens Prop Commits CommitProp
Rafael J. Wysocki 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%

#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) { }
Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%

#endif /* #ifdef CONFIG_HOTPLUG_CPU */

#endif /* _LINUX_CPU_H_ */
Overall Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 190 25.85% 9 17.31%
Américo Wang 49 6.67% 1 1.92%
Paul E. McKenney 48 6.53% 1 1.92%
Rafael J. Wysocki 41 5.58% 2 3.85%
Rusty Russell 34 4.63% 4 7.69%
Andrew Morton 33 4.49% 4 7.69%
Christian Krafft 33 4.49% 1 1.92%
Sudeep Holla 32 4.35% 1 1.92%
Oleg Nesterov 29 3.95% 1 1.92%
Toshi Kani 24 3.27% 1 1.92%
Nathan Fontenot 22 2.99% 1 1.92%
David S. Miller 21 2.86% 1 1.92%
Ashok Raj 20 2.72% 3 5.77%
James Morse 18 2.45% 1 1.92%
Srivatsa S. Bhat 16 2.18% 1 1.92%
Ingo Molnar 16 2.18% 2 3.85%
Len Brown 14 1.90% 1 1.92%
Chris Metcalf 13 1.77% 1 1.92%
Kay Sievers 12 1.63% 1 1.92%
Sudeep KarkadaNagesha 11 1.50% 1 1.92%
Patrick Mochel 9 1.22% 1 1.92%
Manfred Spraul 8 1.09% 1 1.92%
Josh Triplett 8 1.09% 1 1.92%
Peter Zijlstra 8 1.09% 1 1.92%
Anton Vorontsov 7 0.95% 1 1.92%
Nicolas Iooss 4 0.54% 1 1.92%
Jonathan Corbet 3 0.41% 1 1.92%
Kamezawa Hiroyuki 3 0.41% 1 1.92%
Paul Gortmaker 3 0.41% 1 1.92%
Suresh B. Siddha 2 0.27% 1 1.92%
Robert P. J. Day 1 0.14% 1 1.92%
Gautham R. Shenoy 1 0.14% 1 1.92%
Greg Kroah-Hartman 1 0.14% 1 1.92%
Ralf Bächle 1 0.14% 1 1.92%
Total 735 100.00% 52 100.00%
Directory: include/linux

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Oleg Nesterov	8	100.00%	1	100.00%
Total	8	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 include/linux/cpu.h

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Overall Contributors
