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Thomas Gleixnercff7d372016-02-26 18:43:28 +00001#ifndef __CPUHOTPLUG_H
2#define __CPUHOTPLUG_H
3
Paul Burton6cfeaf52016-09-14 11:00:26 +01004#include <linux/types.h>
5
Thomas Gleixnercff7d372016-02-26 18:43:28 +00006enum cpuhp_state {
7 CPUHP_OFFLINE,
8 CPUHP_CREATE_THREADS,
Thomas Gleixner00e16c32016-07-13 17:16:09 +00009 CPUHP_PERF_PREPARE,
Thomas Gleixner95ca7922016-07-13 17:16:10 +000010 CPUHP_PERF_X86_PREPARE,
Thomas Gleixner1a246b92016-07-13 17:16:12 +000011 CPUHP_PERF_X86_UNCORE_PREP,
Richard Cochran96b2bd32016-07-13 17:16:13 +000012 CPUHP_PERF_X86_AMD_UNCORE_PREP,
Richard Cochran8b5b7732016-07-13 17:16:15 +000013 CPUHP_PERF_X86_RAPL_PREP,
Thomas Gleixnera409f5e2016-07-13 17:16:19 +000014 CPUHP_PERF_BFIN,
Thomas Gleixner57ecde42016-07-13 17:16:20 +000015 CPUHP_PERF_POWER,
Thomas Gleixnere3cfce12016-07-13 17:16:23 +000016 CPUHP_PERF_SUPERH,
Sebastian Andrzej Siewior48d7f6c2016-07-13 17:16:30 +000017 CPUHP_X86_HPET_DEAD,
Sebastian Andrzej Siewior148b9e22016-07-13 17:16:34 +000018 CPUHP_X86_APB_DEAD,
Sebastian Andrzej Siewior8017c272016-08-12 19:49:43 +020019 CPUHP_VIRT_NET_DEAD,
Sebastian Andrzej Siewiora96a87b2016-08-18 14:57:19 +020020 CPUHP_SLUB_DEAD,
Sebastian Andrzej Siewior1d7ac6a2016-08-18 14:57:20 +020021 CPUHP_MM_WRITEBACK_DEAD,
Sebastian Andrzej Siewiorc4544db2016-08-18 14:57:21 +020022 CPUHP_SOFTIRQ_DEAD,
Sebastian Andrzej Siewior84a3f4d2016-08-18 14:57:23 +020023 CPUHP_NET_MVNETA_DEAD,
Sebastian Andrzej Siewior529351f2016-08-18 14:57:25 +020024 CPUHP_CPUIDLE_DEAD,
Sebastian Andrzej Siewiorc23a7262016-09-06 19:04:37 +020025 CPUHP_ARM64_FPSIMD_DEAD,
Sebastian Andrzej Siewiora4fa9cc2016-09-06 19:04:39 +020026 CPUHP_ARM_OMAP_WAKE_DEAD,
Sebastian Andrzej Siewior75e12ed2016-09-06 19:04:43 +020027 CPUHP_IRQ_POLL_DEAD,
Sebastian Andrzej Siewior9a659f42016-09-06 19:04:44 +020028 CPUHP_BLOCK_SOFTIRQ_DEAD,
Sebastian Andrzej Siewior8904f5a2016-09-06 19:04:46 +020029 CPUHP_VIRT_SCSI_DEAD,
Sebastian Andrzej Siewior64f3bf22016-09-06 19:04:47 +020030 CPUHP_ACPI_CPUDRV_DEAD,
Sebastian Andrzej Siewior84c9cee2016-09-06 19:04:53 +020031 CPUHP_S390_PFAULT_DEAD,
Sebastian Andrzej Siewiore2a738f2016-09-06 19:04:55 +020032 CPUHP_BLK_MQ_DEAD,
Thomas Gleixner7ee681b2016-07-13 17:16:29 +000033 CPUHP_WORKQUEUE_PREP,
Sebastian Andrzej Siewiorbdab88e2016-07-18 16:07:28 +020034 CPUHP_POWER_NUMA_PREPARE,
Thomas Gleixner27590dc2016-07-15 10:41:04 +020035 CPUHP_HRTIMERS_PREPARE,
Sebastian Andrzej Siewiore722d8d2016-07-13 17:16:59 +000036 CPUHP_PROFILE_PREPARE,
Sebastian Andrzej Siewior6b2c2842016-07-13 17:17:00 +000037 CPUHP_X2APIC_PREPARE,
Richard Weinberger31487f82016-07-13 17:17:01 +000038 CPUHP_SMPCFD_PREPARE,
Richard Weinbergere6d49892016-08-18 14:57:17 +020039 CPUHP_RELAY_PREPARE,
Sebastian Andrzej Siewior6731d4f2016-08-23 14:53:19 +020040 CPUHP_SLAB_PREPARE,
Sebastian Andrzej Siewior29c6d1b2016-08-18 14:57:24 +020041 CPUHP_MD_RAID5_PREPARE,
Thomas Gleixner4df83742016-07-13 17:17:03 +000042 CPUHP_RCUTREE_PREP,
Sabyasachi Singh518d4abc2017-06-26 13:56:47 -070043 CPUHP_CORE_CTL_ISOLATION_DEAD,
Sebastian Andrzej Siewiordfc616d2016-08-24 11:14:44 +020044 CPUHP_CPUIDLE_COUPLED_PREPARE,
Sebastian Andrzej Siewior68e694d2016-08-18 14:57:30 +020045 CPUHP_POWERPC_PMAC_PREPARE,
Sebastian Andrzej Siewiorda3ed652016-08-18 14:57:31 +020046 CPUHP_POWERPC_MMU_CTX_PREPARE,
Boris Ostrovsky4d737042016-09-07 13:19:00 -040047 CPUHP_XEN_PREPARE,
Sebastian Andrzej Siewiorc8761e22016-09-07 13:19:01 -040048 CPUHP_XEN_EVTCHN_PREPARE,
Stephen Boyd6208a582017-03-02 15:09:13 -080049 CPUHP_QCOM_CPUFREQ_PREPARE,
Thomas Gleixnercff7d372016-02-26 18:43:28 +000050 CPUHP_NOTIFY_PREPARE,
Sebastian Andrzej Siewior657ebf7a2016-09-06 19:04:38 +020051 CPUHP_ARM_SHMOBILE_SCU_PREPARE,
Sebastian Andrzej Siewior51533232016-09-06 19:04:41 +020052 CPUHP_SH_SH3X_PREPARE,
Sebastian Andrzej Siewiore2a738f2016-09-06 19:04:55 +020053 CPUHP_BLK_MQ_PREPARE,
Sebastian Andrzej Siewiord8d6c8a2016-11-03 15:50:09 +010054 CPUHP_TOPOLOGY_PREPARE,
Richard Cochran4fae16d2016-07-27 11:08:18 +020055 CPUHP_TIMERS_DEAD,
Sebastian Andrzej Siewior8c588982016-09-06 19:04:50 +020056 CPUHP_NOTF_ERR_INJ_PREPARE,
Sebastian Andrzej Siewiordd6d7c62016-09-06 19:04:51 +020057 CPUHP_MIPS_SOC_PREPARE,
Thomas Gleixnercff7d372016-02-26 18:43:28 +000058 CPUHP_BRINGUP_CPU,
Thomas Gleixnere69aab12016-02-26 18:43:43 +000059 CPUHP_AP_IDLE_DEAD,
Thomas Gleixner4baa0af2016-02-26 18:43:29 +000060 CPUHP_AP_OFFLINE,
Thomas Gleixner9cf72432016-03-10 12:54:09 +010061 CPUHP_AP_SCHED_STARTING,
Thomas Gleixner4df83742016-07-13 17:17:03 +000062 CPUHP_AP_RCUTREE_DYING,
Richard Cochran93131f72016-07-13 17:16:04 +000063 CPUHP_AP_IRQ_GIC_STARTING,
Richard Cochran6670a6d2016-07-13 17:16:05 +000064 CPUHP_AP_IRQ_GICV3_STARTING,
Richard Cochran6c034d12016-07-13 17:16:06 +000065 CPUHP_AP_IRQ_HIP04_STARTING,
Richard Cochrancb5ff2d2016-07-13 17:16:07 +000066 CPUHP_AP_IRQ_ARMADA_XP_STARTING,
67 CPUHP_AP_IRQ_ARMADA_CASC_STARTING,
Sebastian Andrzej Siewior7ca04bc2016-07-13 17:16:07 +000068 CPUHP_AP_IRQ_BCM2836_STARTING,
Sebastian Andrzej Siewior7fbbaeb2016-07-13 17:16:08 +000069 CPUHP_AP_ARM_MVEBU_COHERENCY,
Thomas Gleixner1a246b92016-07-13 17:16:12 +000070 CPUHP_AP_PERF_X86_UNCORE_STARTING,
Richard Cochran96b2bd32016-07-13 17:16:13 +000071 CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
Thomas Gleixner95ca7922016-07-13 17:16:10 +000072 CPUHP_AP_PERF_X86_STARTING,
Thomas Gleixner9744f7b2016-07-13 17:16:14 +000073 CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
Richard Cochranf0704822016-07-13 17:16:16 +000074 CPUHP_AP_PERF_X86_CQM_STARTING,
Sebastian Andrzej Siewior77c34ef2016-07-13 17:16:18 +000075 CPUHP_AP_PERF_X86_CSTATE_STARTING,
Sebastian Andrzej Siewior25a77b52016-07-13 17:16:26 +000076 CPUHP_AP_PERF_XTENSA_STARTING,
Richard Cochran04d045a2016-07-13 17:16:49 +000077 CPUHP_AP_PERF_METAG_STARTING,
Richard Cochran65264e32016-07-13 17:16:53 +000078 CPUHP_AP_MIPS_OP_LOONGSON3_STARTING,
Thomas Gleixnere5b61ba2016-07-13 17:16:35 +000079 CPUHP_AP_ARM_VFP_STARTING,
Will Deacone937dd52016-08-16 11:29:17 +010080 CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING,
Will Deacond7a83d12016-08-15 18:55:11 +010081 CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING,
Thomas Gleixner7d88eb62016-07-13 17:16:36 +000082 CPUHP_AP_PERF_ARM_STARTING,
Richard Cochran9eeb2262016-07-13 17:16:50 +000083 CPUHP_AP_ARM_L2X0_STARTING,
Richard Cochran7e86e8b2016-07-13 17:16:39 +000084 CPUHP_AP_ARM_ARCH_TIMER_STARTING,
Richard Cochranb8a12292016-07-13 17:17:04 +000085 CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
Rich Felker9995f4f2016-10-13 21:51:06 +000086 CPUHP_AP_JCORE_TIMER_STARTING,
Richard Cochrand11b3a62016-07-13 17:17:05 +000087 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
Richard Cochran26b87682016-07-13 17:16:51 +000088 CPUHP_AP_ARM_TWD_STARTING,
Richard Cochran31e8e5d2016-07-13 17:16:42 +000089 CPUHP_AP_METAG_TIMER_STARTING,
Richard Cochranb0404162016-07-13 17:16:43 +000090 CPUHP_AP_QCOM_TIMER_STARTING,
Mahesh Sivasubramanian63ea2522016-11-04 15:40:41 -060091 CPUHP_AP_QCOM_SLEEP_STARTING,
Stephen Boyd6208a582017-03-02 15:09:13 -080092 CPUHP_AP_QCOM_CPUFREQ_STARTING,
Richard Cochran2c48fef2016-07-13 17:17:06 +000093 CPUHP_AP_ARMADA_TIMER_STARTING,
Richard Cochraneb0a9d82016-07-13 17:17:07 +000094 CPUHP_AP_MARCO_TIMER_STARTING,
Richard Cochran2dab9092016-07-13 17:16:44 +000095 CPUHP_AP_MIPS_GIC_TIMER_STARTING,
Anna-Maria Gleixnerecd80812016-07-13 17:17:07 +000096 CPUHP_AP_ARC_TIMER_STARTING,
Thomas Gleixner8c18b2d2016-07-13 17:16:37 +000097 CPUHP_AP_KVM_STARTING,
Anna-Maria Gleixner15d7e3d2016-07-13 17:17:02 +000098 CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
Richard Cochran42ec50b2016-07-13 17:16:46 +000099 CPUHP_AP_KVM_ARM_VGIC_STARTING,
Richard Cochranb3c99502016-07-13 17:16:47 +0000100 CPUHP_AP_KVM_ARM_TIMER_STARTING,
Thomas Gleixner34db2012016-12-15 12:01:05 +0100101 /* Must be the last timer callback */
102 CPUHP_AP_DUMMY_TIMER_STARTING,
Richard Cochran4761adb2016-07-13 17:16:52 +0000103 CPUHP_AP_ARM_XEN_STARTING,
Richard Cochran2b5283d2016-07-13 17:16:54 +0000104 CPUHP_AP_ARM_CORESIGHT_STARTING,
Sebastian Andrzej Siewior58eb4572016-07-13 17:16:55 +0000105 CPUHP_AP_ARM_CORESIGHT4_STARTING,
Sebastian Andrzej Siewior27c01a82016-07-13 17:16:56 +0000106 CPUHP_AP_ARM64_ISNDEP_STARTING,
Richard Weinberger31487f82016-07-13 17:17:01 +0000107 CPUHP_AP_SMPCFD_DYING,
Richard Cochranae6a8a22016-07-13 17:16:57 +0000108 CPUHP_AP_X86_TBOOT_DYING,
Thomas Gleixner4baa0af2016-02-26 18:43:29 +0000109 CPUHP_AP_ONLINE,
110 CPUHP_TEARDOWN_CPU,
Thomas Gleixnerfc6d73d2016-02-26 18:43:40 +0000111 CPUHP_AP_ONLINE_IDLE,
Thomas Gleixner1cf4f622016-02-26 18:43:39 +0000112 CPUHP_AP_SMPBOOT_THREADS,
Sebastian Andrzej Siewior07d36c92016-07-13 17:16:03 +0000113 CPUHP_AP_X86_VDSO_VMA_ONLINE,
Thomas Gleixner00e16c32016-07-13 17:16:09 +0000114 CPUHP_AP_PERF_ONLINE,
Thomas Gleixner95ca7922016-07-13 17:16:10 +0000115 CPUHP_AP_PERF_X86_ONLINE,
Thomas Gleixner1a246b92016-07-13 17:16:12 +0000116 CPUHP_AP_PERF_X86_UNCORE_ONLINE,
Richard Cochran96b2bd32016-07-13 17:16:13 +0000117 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
Anna-Maria Gleixnerc6a84daa2016-07-13 17:16:28 +0000118 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
Richard Cochran8b5b7732016-07-13 17:16:15 +0000119 CPUHP_AP_PERF_X86_RAPL_ONLINE,
Richard Cochranf0704822016-07-13 17:16:16 +0000120 CPUHP_AP_PERF_X86_CQM_ONLINE,
Sebastian Andrzej Siewior77c34ef2016-07-13 17:16:18 +0000121 CPUHP_AP_PERF_X86_CSTATE_ONLINE,
Thomas Gleixner4f0f8212016-07-13 17:16:21 +0000122 CPUHP_AP_PERF_S390_CF_ONLINE,
Sebastian Andrzej Siewiore3d617f2016-07-13 17:16:22 +0000123 CPUHP_AP_PERF_S390_SF_ONLINE,
Sebastian Andrzej Siewior28c94842016-07-13 17:16:24 +0000124 CPUHP_AP_PERF_ARM_CCI_ONLINE,
Sebastian Andrzej Siewiorfdc15a32016-07-13 17:16:25 +0000125 CPUHP_AP_PERF_ARM_CCN_ONLINE,
Mark Rutlandb828f962016-09-02 10:35:18 +0100126 CPUHP_AP_PERF_ARM_L2X0_ONLINE,
Thomas Gleixner7ee681b2016-07-13 17:16:29 +0000127 CPUHP_AP_WORKQUEUE_ONLINE,
Thomas Gleixner4df83742016-07-13 17:17:03 +0000128 CPUHP_AP_RCUTREE_ONLINE,
Thomas Gleixner1cf4f622016-02-26 18:43:39 +0000129 CPUHP_AP_NOTIFY_ONLINE,
130 CPUHP_AP_ONLINE_DYN,
131 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30,
Sebastian Andrzej Siewior48d7f6c2016-07-13 17:16:30 +0000132 CPUHP_AP_X86_HPET_ONLINE,
Sebastian Andrzej Siewior251a5fd2016-07-13 17:16:33 +0000133 CPUHP_AP_X86_KVM_CLK_ONLINE,
Thomas Gleixneraaddd7d2016-03-10 12:54:19 +0100134 CPUHP_AP_ACTIVE,
Thomas Gleixnercff7d372016-02-26 18:43:28 +0000135 CPUHP_ONLINE,
136};
137
Thomas Gleixner5b7aa872016-02-26 18:43:33 +0000138int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
139 int (*startup)(unsigned int cpu),
Thomas Gleixnercf392d12016-08-12 19:49:39 +0200140 int (*teardown)(unsigned int cpu), bool multi_instance);
Thomas Gleixner5b7aa872016-02-26 18:43:33 +0000141
142/**
143 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
144 * @state: The state for which the calls are installed
145 * @name: Name of the callback (will be used in debug output)
146 * @startup: startup callback function
147 * @teardown: teardown callback function
148 *
149 * Installs the callback functions and invokes the startup callback on
150 * the present cpus which have already reached the @state.
151 */
152static inline int cpuhp_setup_state(enum cpuhp_state state,
153 const char *name,
154 int (*startup)(unsigned int cpu),
155 int (*teardown)(unsigned int cpu))
156{
Thomas Gleixnercf392d12016-08-12 19:49:39 +0200157 return __cpuhp_setup_state(state, name, true, startup, teardown, false);
Thomas Gleixner5b7aa872016-02-26 18:43:33 +0000158}
159
160/**
161 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
162 * callbacks
163 * @state: The state for which the calls are installed
164 * @name: Name of the callback.
165 * @startup: startup callback function
166 * @teardown: teardown callback function
167 *
168 * Same as @cpuhp_setup_state except that no calls are executed are invoked
169 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
170 */
171static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
172 const char *name,
173 int (*startup)(unsigned int cpu),
174 int (*teardown)(unsigned int cpu))
175{
Thomas Gleixnercf392d12016-08-12 19:49:39 +0200176 return __cpuhp_setup_state(state, name, false, startup, teardown,
177 false);
178}
179
180/**
181 * cpuhp_setup_state_multi - Add callbacks for multi state
182 * @state: The state for which the calls are installed
183 * @name: Name of the callback.
184 * @startup: startup callback function
185 * @teardown: teardown callback function
186 *
187 * Sets the internal multi_instance flag and prepares a state to work as a multi
188 * instance callback. No callbacks are invoked at this point. The callbacks are
189 * invoked once an instance for this state are registered via
190 * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls.
191 */
192static inline int cpuhp_setup_state_multi(enum cpuhp_state state,
193 const char *name,
194 int (*startup)(unsigned int cpu,
195 struct hlist_node *node),
196 int (*teardown)(unsigned int cpu,
197 struct hlist_node *node))
198{
199 return __cpuhp_setup_state(state, name, false,
200 (void *) startup,
201 (void *) teardown, true);
202}
203
204int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
205 bool invoke);
206
207/**
208 * cpuhp_state_add_instance - Add an instance for a state and invoke startup
209 * callback.
210 * @state: The state for which the instance is installed
211 * @node: The node for this individual state.
212 *
213 * Installs the instance for the @state and invokes the startup callback on
214 * the present cpus which have already reached the @state. The @state must have
215 * been earlier marked as multi-instance by @cpuhp_setup_state_multi.
216 */
217static inline int cpuhp_state_add_instance(enum cpuhp_state state,
218 struct hlist_node *node)
219{
220 return __cpuhp_state_add_instance(state, node, true);
221}
222
223/**
224 * cpuhp_state_add_instance_nocalls - Add an instance for a state without
225 * invoking the startup callback.
226 * @state: The state for which the instance is installed
227 * @node: The node for this individual state.
228 *
229 * Installs the instance for the @state The @state must have been earlier
230 * marked as multi-instance by @cpuhp_setup_state_multi.
231 */
232static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state,
233 struct hlist_node *node)
234{
235 return __cpuhp_state_add_instance(state, node, false);
Thomas Gleixner5b7aa872016-02-26 18:43:33 +0000236}
237
238void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
239
240/**
241 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
242 * @state: The state for which the calls are removed
243 *
244 * Removes the callback functions and invokes the teardown callback on
245 * the present cpus which have already reached the @state.
246 */
247static inline void cpuhp_remove_state(enum cpuhp_state state)
248{
249 __cpuhp_remove_state(state, true);
250}
251
252/**
253 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
254 * teardown
255 * @state: The state for which the calls are removed
256 */
257static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
258{
259 __cpuhp_remove_state(state, false);
260}
261
Thomas Gleixnercf392d12016-08-12 19:49:39 +0200262/**
263 * cpuhp_remove_multi_state - Remove hotplug multi state callback
264 * @state: The state for which the calls are removed
265 *
266 * Removes the callback functions from a multi state. This is the reverse of
267 * cpuhp_setup_state_multi(). All instances should have been removed before
268 * invoking this function.
269 */
270static inline void cpuhp_remove_multi_state(enum cpuhp_state state)
271{
272 __cpuhp_remove_state(state, false);
273}
274
275int __cpuhp_state_remove_instance(enum cpuhp_state state,
276 struct hlist_node *node, bool invoke);
277
278/**
279 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke
280 * the teardown callback
281 * @state: The state from which the instance is removed
282 * @node: The node for this individual state.
283 *
284 * Removes the instance and invokes the teardown callback on the present cpus
285 * which have already reached the @state.
286 */
287static inline int cpuhp_state_remove_instance(enum cpuhp_state state,
288 struct hlist_node *node)
289{
290 return __cpuhp_state_remove_instance(state, node, true);
291}
292
293/**
294 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state
295 * without invoking the reatdown callback
296 * @state: The state from which the instance is removed
297 * @node: The node for this individual state.
298 *
299 * Removes the instance without invoking the teardown callback.
300 */
301static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,
302 struct hlist_node *node)
303{
304 return __cpuhp_state_remove_instance(state, node, false);
305}
306
Thomas Gleixner8df3e072016-02-26 18:43:41 +0000307#ifdef CONFIG_SMP
308void cpuhp_online_idle(enum cpuhp_state state);
309#else
310static inline void cpuhp_online_idle(enum cpuhp_state state) { }
311#endif
312
Thomas Gleixnercff7d372016-02-26 18:43:28 +0000313#endif