Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * include/linux/cpu.h - generic cpu definition |
| 3 | * |
| 4 | * This is mainly for topological representation. We define the |
| 5 | * basic 'struct cpu' here, which can be embedded in per-arch |
| 6 | * definitions of processors. |
| 7 | * |
| 8 | * Basic handling of the devices is done in drivers/base/cpu.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * |
Robert P. J. Day | 611a75e1 | 2013-05-03 06:45:48 -0400 | [diff] [blame] | 10 | * CPUs are exported via sysfs in the devices/system/cpu |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * directory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | */ |
| 13 | #ifndef _LINUX_CPU_H_ |
| 14 | #define _LINUX_CPU_H_ |
| 15 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/node.h> |
| 17 | #include <linux/compiler.h> |
| 18 | #include <linux/cpumask.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
Paul Gortmaker | 313162d | 2012-01-30 11:46:54 -0500 | [diff] [blame] | 20 | struct device; |
David Miller | d1cb9d1 | 2013-10-03 17:24:51 -0400 | [diff] [blame] | 21 | struct device_node; |
Sudeep Holla | 3d52943 | 2014-09-30 14:48:24 +0100 | [diff] [blame] | 22 | struct attribute_group; |
Paul Gortmaker | 313162d | 2012-01-30 11:46:54 -0500 | [diff] [blame] | 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | struct cpu { |
| 25 | int node_id; /* The node which contains the CPU */ |
Siddha, Suresh B | 72486f1 | 2006-12-07 02:14:10 +0100 | [diff] [blame] | 26 | int hotpluggable; /* creates sysfs control file if hotpluggable */ |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 27 | struct device dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | }; |
| 29 | |
KAMEZAWA Hiroyuki | 76b67ed9 | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 30 | extern int register_cpu(struct cpu *cpu, int num); |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 31 | extern struct device *get_cpu_device(unsigned cpu); |
Josh Triplett | 2987557 | 2011-12-03 13:06:50 -0800 | [diff] [blame] | 32 | extern bool cpu_is_hotpluggable(unsigned cpu); |
Sudeep KarkadaNagesha | 183912d | 2013-08-15 14:01:40 +0100 | [diff] [blame] | 33 | extern bool arch_match_cpu_phys_id(int cpu, u64 phys_id); |
David Miller | d1cb9d1 | 2013-10-03 17:24:51 -0400 | [diff] [blame] | 34 | extern bool arch_find_n_match_cpu_physical_id(struct device_node *cpun, |
| 35 | int cpu, unsigned int *thread); |
Christian Krafft | 0344c6c | 2006-10-24 18:31:24 +0200 | [diff] [blame] | 36 | |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 37 | extern int cpu_add_dev_attr(struct device_attribute *attr); |
| 38 | extern void cpu_remove_dev_attr(struct device_attribute *attr); |
Christian Krafft | 0344c6c | 2006-10-24 18:31:24 +0200 | [diff] [blame] | 39 | |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 40 | extern int cpu_add_dev_attr_group(struct attribute_group *attrs); |
| 41 | extern void cpu_remove_dev_attr_group(struct attribute_group *attrs); |
Christian Krafft | 0344c6c | 2006-10-24 18:31:24 +0200 | [diff] [blame] | 42 | |
Sudeep Holla | 3d52943 | 2014-09-30 14:48:24 +0100 | [diff] [blame] | 43 | extern struct device *cpu_device_create(struct device *parent, void *drvdata, |
| 44 | const struct attribute_group **groups, |
| 45 | const char *fmt, ...); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #ifdef CONFIG_HOTPLUG_CPU |
KAMEZAWA Hiroyuki | 76b67ed9 | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 47 | extern void unregister_cpu(struct cpu *cpu); |
Nathan Fontenot | 12633e8 | 2009-11-25 17:23:25 +0000 | [diff] [blame] | 48 | extern ssize_t arch_cpu_probe(const char *, size_t); |
| 49 | extern ssize_t arch_cpu_release(const char *, size_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #endif |
| 51 | struct notifier_block; |
| 52 | |
Tejun Heo | 50a323b | 2010-06-08 21:40:36 +0200 | [diff] [blame] | 53 | /* |
| 54 | * CPU notifier priorities. |
| 55 | */ |
| 56 | enum { |
Tejun Heo | 3a101d0 | 2010-06-08 21:40:36 +0200 | [diff] [blame] | 57 | /* |
| 58 | * SCHED_ACTIVE marks a cpu which is coming up active during |
| 59 | * CPU_ONLINE and CPU_DOWN_FAILED and must be the first |
| 60 | * notifier. CPUSET_ACTIVE adjusts cpuset according to |
| 61 | * cpu_active mask right after SCHED_ACTIVE. During |
| 62 | * CPU_DOWN_PREPARE, SCHED_INACTIVE and CPUSET_INACTIVE are |
| 63 | * ordered in the similar way. |
| 64 | * |
| 65 | * This ordering guarantees consistent cpu_active mask and |
| 66 | * migration behavior to all cpu notifiers. |
| 67 | */ |
| 68 | CPU_PRI_SCHED_ACTIVE = INT_MAX, |
| 69 | CPU_PRI_CPUSET_ACTIVE = INT_MAX - 1, |
| 70 | CPU_PRI_SCHED_INACTIVE = INT_MIN + 1, |
| 71 | CPU_PRI_CPUSET_INACTIVE = INT_MIN, |
| 72 | |
Tejun Heo | 50a323b | 2010-06-08 21:40:36 +0200 | [diff] [blame] | 73 | /* migration should happen before other stuff but after perf */ |
| 74 | CPU_PRI_PERF = 20, |
| 75 | CPU_PRI_MIGRATION = 10, |
Tejun Heo | 6575820 | 2012-07-17 12:39:26 -0700 | [diff] [blame] | 76 | /* bring up workqueues before normal notifiers and down after */ |
| 77 | CPU_PRI_WORKQUEUE_UP = 5, |
| 78 | CPU_PRI_WORKQUEUE_DOWN = -5, |
Tejun Heo | 50a323b | 2010-06-08 21:40:36 +0200 | [diff] [blame] | 79 | }; |
| 80 | |
Amerigo Wang | 80f1ff9 | 2011-07-25 17:13:08 -0700 | [diff] [blame] | 81 | #define CPU_ONLINE 0x0002 /* CPU (unsigned)v is up */ |
| 82 | #define CPU_UP_PREPARE 0x0003 /* CPU (unsigned)v coming up */ |
| 83 | #define CPU_UP_CANCELED 0x0004 /* CPU (unsigned)v NOT coming up */ |
| 84 | #define CPU_DOWN_PREPARE 0x0005 /* CPU (unsigned)v going down */ |
| 85 | #define CPU_DOWN_FAILED 0x0006 /* CPU (unsigned)v NOT going down */ |
| 86 | #define CPU_DEAD 0x0007 /* CPU (unsigned)v dead */ |
| 87 | #define CPU_DYING 0x0008 /* CPU (unsigned)v not running any task, |
| 88 | * not handling interrupts, soon dead. |
| 89 | * Called on the dying cpu, interrupts |
| 90 | * are already disabled. Must not |
| 91 | * sleep, must not fail */ |
| 92 | #define CPU_POST_DEAD 0x0009 /* CPU (unsigned)v dead, cpu_hotplug |
| 93 | * lock is dropped */ |
| 94 | #define CPU_STARTING 0x000A /* CPU (unsigned)v soon running. |
| 95 | * Called on the new cpu, just before |
| 96 | * enabling interrupts. Must not sleep, |
| 97 | * must not fail */ |
Paul E. McKenney | 88428cc | 2015-01-28 14:42:09 -0800 | [diff] [blame] | 98 | #define CPU_DYING_IDLE 0x000B /* CPU (unsigned)v dying, reached |
| 99 | * idle loop. */ |
Paul E. McKenney | 8038dad | 2015-02-25 10:34:39 -0800 | [diff] [blame] | 100 | #define CPU_BROKEN 0x000C /* CPU (unsigned)v did not die properly, |
| 101 | * perhaps due to preemption. */ |
Amerigo Wang | 80f1ff9 | 2011-07-25 17:13:08 -0700 | [diff] [blame] | 102 | |
| 103 | /* Used for CPU hotplug events occurring while tasks are frozen due to a suspend |
| 104 | * operation in progress |
| 105 | */ |
| 106 | #define CPU_TASKS_FROZEN 0x0010 |
| 107 | |
| 108 | #define CPU_ONLINE_FROZEN (CPU_ONLINE | CPU_TASKS_FROZEN) |
| 109 | #define CPU_UP_PREPARE_FROZEN (CPU_UP_PREPARE | CPU_TASKS_FROZEN) |
| 110 | #define CPU_UP_CANCELED_FROZEN (CPU_UP_CANCELED | CPU_TASKS_FROZEN) |
| 111 | #define CPU_DOWN_PREPARE_FROZEN (CPU_DOWN_PREPARE | CPU_TASKS_FROZEN) |
| 112 | #define CPU_DOWN_FAILED_FROZEN (CPU_DOWN_FAILED | CPU_TASKS_FROZEN) |
| 113 | #define CPU_DEAD_FROZEN (CPU_DEAD | CPU_TASKS_FROZEN) |
| 114 | #define CPU_DYING_FROZEN (CPU_DYING | CPU_TASKS_FROZEN) |
| 115 | #define CPU_STARTING_FROZEN (CPU_STARTING | CPU_TASKS_FROZEN) |
| 116 | |
| 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | #ifdef CONFIG_SMP |
| 119 | /* Need to know about CPUs going up/down? */ |
Paul E. McKenney | 799e64f | 2009-08-15 09:53:47 -0700 | [diff] [blame] | 120 | #if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE) |
| 121 | #define cpu_notifier(fn, pri) { \ |
Paul Gortmaker | 0db0628 | 2013-06-19 14:53:51 -0400 | [diff] [blame] | 122 | static struct notifier_block fn##_nb = \ |
Paul E. McKenney | 799e64f | 2009-08-15 09:53:47 -0700 | [diff] [blame] | 123 | { .notifier_call = fn, .priority = pri }; \ |
| 124 | register_cpu_notifier(&fn##_nb); \ |
| 125 | } |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 126 | |
| 127 | #define __cpu_notifier(fn, pri) { \ |
| 128 | static struct notifier_block fn##_nb = \ |
| 129 | { .notifier_call = fn, .priority = pri }; \ |
| 130 | __register_cpu_notifier(&fn##_nb); \ |
| 131 | } |
Paul E. McKenney | 799e64f | 2009-08-15 09:53:47 -0700 | [diff] [blame] | 132 | #else /* #if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE) */ |
| 133 | #define cpu_notifier(fn, pri) do { (void)(fn); } while (0) |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 134 | #define __cpu_notifier(fn, pri) do { (void)(fn); } while (0) |
Paul E. McKenney | 799e64f | 2009-08-15 09:53:47 -0700 | [diff] [blame] | 135 | #endif /* #else #if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE) */ |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 136 | |
Chandra Seetharaman | 65edc68 | 2006-06-27 02:54:08 -0700 | [diff] [blame] | 137 | #ifdef CONFIG_HOTPLUG_CPU |
Avi Kivity | 47e627b | 2007-02-12 00:54:43 -0800 | [diff] [blame] | 138 | extern int register_cpu_notifier(struct notifier_block *nb); |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 139 | extern int __register_cpu_notifier(struct notifier_block *nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | extern void unregister_cpu_notifier(struct notifier_block *nb); |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 141 | extern void __unregister_cpu_notifier(struct notifier_block *nb); |
Chandra Seetharaman | 65edc68 | 2006-06-27 02:54:08 -0700 | [diff] [blame] | 142 | #else |
Avi Kivity | 47e627b | 2007-02-12 00:54:43 -0800 | [diff] [blame] | 143 | |
| 144 | #ifndef MODULE |
| 145 | extern int register_cpu_notifier(struct notifier_block *nb); |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 146 | extern int __register_cpu_notifier(struct notifier_block *nb); |
Avi Kivity | 47e627b | 2007-02-12 00:54:43 -0800 | [diff] [blame] | 147 | #else |
| 148 | static inline int register_cpu_notifier(struct notifier_block *nb) |
| 149 | { |
| 150 | return 0; |
| 151 | } |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 152 | |
| 153 | static inline int __register_cpu_notifier(struct notifier_block *nb) |
| 154 | { |
| 155 | return 0; |
| 156 | } |
Avi Kivity | 47e627b | 2007-02-12 00:54:43 -0800 | [diff] [blame] | 157 | #endif |
| 158 | |
Chandra Seetharaman | 65edc68 | 2006-06-27 02:54:08 -0700 | [diff] [blame] | 159 | static inline void unregister_cpu_notifier(struct notifier_block *nb) |
| 160 | { |
| 161 | } |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 162 | |
| 163 | static inline void __unregister_cpu_notifier(struct notifier_block *nb) |
| 164 | { |
| 165 | } |
Chandra Seetharaman | 65edc68 | 2006-06-27 02:54:08 -0700 | [diff] [blame] | 166 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
| 168 | int cpu_up(unsigned int cpu); |
Manfred Spraul | e545a61 | 2008-09-07 16:57:22 +0200 | [diff] [blame] | 169 | void notify_cpu_starting(unsigned int cpu); |
Oleg Nesterov | 3da1c84 | 2008-07-25 01:47:50 -0700 | [diff] [blame] | 170 | extern void cpu_maps_update_begin(void); |
| 171 | extern void cpu_maps_update_done(void); |
Ingo Molnar | d0d23b5 | 2008-01-25 21:08:02 +0100 | [diff] [blame] | 172 | |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 173 | #define cpu_notifier_register_begin cpu_maps_update_begin |
| 174 | #define cpu_notifier_register_done cpu_maps_update_done |
| 175 | |
Oleg Nesterov | 3da1c84 | 2008-07-25 01:47:50 -0700 | [diff] [blame] | 176 | #else /* CONFIG_SMP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
Paul E. McKenney | 799e64f | 2009-08-15 09:53:47 -0700 | [diff] [blame] | 178 | #define cpu_notifier(fn, pri) do { (void)(fn); } while (0) |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 179 | #define __cpu_notifier(fn, pri) do { (void)(fn); } while (0) |
Paul E. McKenney | 799e64f | 2009-08-15 09:53:47 -0700 | [diff] [blame] | 180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | static inline int register_cpu_notifier(struct notifier_block *nb) |
| 182 | { |
| 183 | return 0; |
| 184 | } |
Ingo Molnar | d0d23b5 | 2008-01-25 21:08:02 +0100 | [diff] [blame] | 185 | |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 186 | static inline int __register_cpu_notifier(struct notifier_block *nb) |
| 187 | { |
| 188 | return 0; |
| 189 | } |
| 190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | static inline void unregister_cpu_notifier(struct notifier_block *nb) |
| 192 | { |
| 193 | } |
| 194 | |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 195 | static inline void __unregister_cpu_notifier(struct notifier_block *nb) |
| 196 | { |
| 197 | } |
| 198 | |
Oleg Nesterov | 3da1c84 | 2008-07-25 01:47:50 -0700 | [diff] [blame] | 199 | static inline void cpu_maps_update_begin(void) |
| 200 | { |
| 201 | } |
| 202 | |
| 203 | static inline void cpu_maps_update_done(void) |
| 204 | { |
| 205 | } |
| 206 | |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 207 | static inline void cpu_notifier_register_begin(void) |
| 208 | { |
| 209 | } |
| 210 | |
| 211 | static inline void cpu_notifier_register_done(void) |
| 212 | { |
| 213 | } |
| 214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | #endif /* CONFIG_SMP */ |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 216 | extern struct bus_type cpu_subsys; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
| 218 | #ifdef CONFIG_HOTPLUG_CPU |
| 219 | /* Stop CPUs going up and down. */ |
Gautham R Shenoy | f7dff2b | 2006-12-06 20:38:58 -0800 | [diff] [blame] | 220 | |
Toshi Kani | b9d10be | 2013-08-12 09:45:53 -0600 | [diff] [blame] | 221 | extern void cpu_hotplug_begin(void); |
| 222 | extern void cpu_hotplug_done(void); |
Gautham R Shenoy | 86ef5c9 | 2008-01-25 21:08:02 +0100 | [diff] [blame] | 223 | extern void get_online_cpus(void); |
Paul E. McKenney | dd56af4 | 2014-08-25 20:25:06 -0700 | [diff] [blame] | 224 | extern bool try_get_online_cpus(void); |
Gautham R Shenoy | 86ef5c9 | 2008-01-25 21:08:02 +0100 | [diff] [blame] | 225 | extern void put_online_cpus(void); |
Srivatsa S. Bhat | 16e53db | 2013-06-12 14:04:36 -0700 | [diff] [blame] | 226 | extern void cpu_hotplug_disable(void); |
| 227 | extern void cpu_hotplug_enable(void); |
Paul E. McKenney | 799e64f | 2009-08-15 09:53:47 -0700 | [diff] [blame] | 228 | #define hotcpu_notifier(fn, pri) cpu_notifier(fn, pri) |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 229 | #define __hotcpu_notifier(fn, pri) __cpu_notifier(fn, pri) |
Chandra Seetharaman | 39f4885 | 2006-06-27 02:54:10 -0700 | [diff] [blame] | 230 | #define register_hotcpu_notifier(nb) register_cpu_notifier(nb) |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 231 | #define __register_hotcpu_notifier(nb) __register_cpu_notifier(nb) |
Chandra Seetharaman | 39f4885 | 2006-06-27 02:54:10 -0700 | [diff] [blame] | 232 | #define unregister_hotcpu_notifier(nb) unregister_cpu_notifier(nb) |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 233 | #define __unregister_hotcpu_notifier(nb) __unregister_cpu_notifier(nb) |
Anton Vorontsov | cb79295 | 2012-05-31 16:26:22 -0700 | [diff] [blame] | 234 | void clear_tasks_mm_cpumask(int cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | int cpu_down(unsigned int cpu); |
Gautham R Shenoy | f7dff2b | 2006-12-06 20:38:58 -0800 | [diff] [blame] | 236 | |
| 237 | #else /* CONFIG_HOTPLUG_CPU */ |
| 238 | |
Toshi Kani | b9d10be | 2013-08-12 09:45:53 -0600 | [diff] [blame] | 239 | static inline void cpu_hotplug_begin(void) {} |
| 240 | static inline void cpu_hotplug_done(void) {} |
Gautham R Shenoy | 86ef5c9 | 2008-01-25 21:08:02 +0100 | [diff] [blame] | 241 | #define get_online_cpus() do { } while (0) |
Paul E. McKenney | dd56af4 | 2014-08-25 20:25:06 -0700 | [diff] [blame] | 242 | #define try_get_online_cpus() true |
Gautham R Shenoy | 86ef5c9 | 2008-01-25 21:08:02 +0100 | [diff] [blame] | 243 | #define put_online_cpus() do { } while (0) |
Srivatsa S. Bhat | 16e53db | 2013-06-12 14:04:36 -0700 | [diff] [blame] | 244 | #define cpu_hotplug_disable() do { } while (0) |
| 245 | #define cpu_hotplug_enable() do { } while (0) |
Ingo Molnar | 02316067 | 2006-12-06 20:38:17 -0800 | [diff] [blame] | 246 | #define hotcpu_notifier(fn, pri) do { (void)(fn); } while (0) |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 247 | #define __hotcpu_notifier(fn, pri) do { (void)(fn); } while (0) |
Satyam Sharma | 761bb43 | 2007-10-18 03:06:38 -0700 | [diff] [blame] | 248 | /* These aren't inline functions due to a GCC bug. */ |
| 249 | #define register_hotcpu_notifier(nb) ({ (void)(nb); 0; }) |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 250 | #define __register_hotcpu_notifier(nb) ({ (void)(nb); 0; }) |
Satyam Sharma | 761bb43 | 2007-10-18 03:06:38 -0700 | [diff] [blame] | 251 | #define unregister_hotcpu_notifier(nb) ({ (void)(nb); }) |
Srivatsa S. Bhat | 93ae4f9 | 2014-03-11 02:04:14 +0530 | [diff] [blame] | 252 | #define __unregister_hotcpu_notifier(nb) ({ (void)(nb); }) |
Gautham R Shenoy | f7dff2b | 2006-12-06 20:38:58 -0800 | [diff] [blame] | 253 | #endif /* CONFIG_HOTPLUG_CPU */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
Rafael J. Wysocki | f3de4be | 2007-08-30 23:56:29 -0700 | [diff] [blame] | 255 | #ifdef CONFIG_PM_SLEEP_SMP |
Rafael J. Wysocki | e3920fb | 2006-09-25 23:32:48 -0700 | [diff] [blame] | 256 | extern int disable_nonboot_cpus(void); |
| 257 | extern void enable_nonboot_cpus(void); |
Rafael J. Wysocki | f3de4be | 2007-08-30 23:56:29 -0700 | [diff] [blame] | 258 | #else /* !CONFIG_PM_SLEEP_SMP */ |
Rafael J. Wysocki | e3920fb | 2006-09-25 23:32:48 -0700 | [diff] [blame] | 259 | static inline int disable_nonboot_cpus(void) { return 0; } |
| 260 | static inline void enable_nonboot_cpus(void) {} |
Rafael J. Wysocki | f3de4be | 2007-08-30 23:56:29 -0700 | [diff] [blame] | 261 | #endif /* !CONFIG_PM_SLEEP_SMP */ |
Rafael J. Wysocki | e3920fb | 2006-09-25 23:32:48 -0700 | [diff] [blame] | 262 | |
Thomas Gleixner | a1a04ec | 2013-03-21 22:49:34 +0100 | [diff] [blame] | 263 | enum cpuhp_state { |
| 264 | CPUHP_OFFLINE, |
| 265 | CPUHP_ONLINE, |
| 266 | }; |
| 267 | |
| 268 | void cpu_startup_entry(enum cpuhp_state state); |
Thomas Gleixner | a1a04ec | 2013-03-21 22:49:34 +0100 | [diff] [blame] | 269 | |
Thomas Gleixner | d166991 | 2013-03-21 22:49:35 +0100 | [diff] [blame] | 270 | void cpu_idle_poll_ctrl(bool enable); |
| 271 | |
| 272 | void arch_cpu_idle(void); |
| 273 | void arch_cpu_idle_prepare(void); |
| 274 | void arch_cpu_idle_enter(void); |
| 275 | void arch_cpu_idle_exit(void); |
| 276 | void arch_cpu_idle_dead(void); |
| 277 | |
Paul E. McKenney | 8038dad | 2015-02-25 10:34:39 -0800 | [diff] [blame] | 278 | DECLARE_PER_CPU(bool, cpu_dead_idle); |
| 279 | |
| 280 | int cpu_report_state(int cpu); |
| 281 | int cpu_check_up_prepare(int cpu); |
| 282 | void cpu_set_state_online(int cpu); |
| 283 | #ifdef CONFIG_HOTPLUG_CPU |
| 284 | bool cpu_wait_death(unsigned int cpu, int seconds); |
| 285 | bool cpu_report_death(void); |
| 286 | #endif /* #ifdef CONFIG_HOTPLUG_CPU */ |
| 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | #endif /* _LINUX_CPU_H_ */ |