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1 #ifndef __CPUHOTPLUG_H
2 #define __CPUHOTPLUG_H
3
4 #include <linux/types.h>
5
6 enum cpuhp_state {
7 CPUHP_OFFLINE,
8 CPUHP_CREATE_THREADS,
9 CPUHP_PERF_PREPARE,
10 CPUHP_PERF_X86_PREPARE,
11 CPUHP_PERF_X86_UNCORE_PREP,
12 CPUHP_PERF_X86_AMD_UNCORE_PREP,
13 CPUHP_PERF_X86_RAPL_PREP,
14 CPUHP_PERF_BFIN,
15 CPUHP_PERF_POWER,
16 CPUHP_PERF_SUPERH,
17 CPUHP_X86_HPET_DEAD,
18 CPUHP_X86_APB_DEAD,
19 CPUHP_VIRT_NET_DEAD,
20 CPUHP_SLUB_DEAD,
21 CPUHP_MM_WRITEBACK_DEAD,
22 CPUHP_SOFTIRQ_DEAD,
23 CPUHP_NET_MVNETA_DEAD,
24 CPUHP_CPUIDLE_DEAD,
25 CPUHP_ARM64_FPSIMD_DEAD,
26 CPUHP_ARM_OMAP_WAKE_DEAD,
27 CPUHP_IRQ_POLL_DEAD,
28 CPUHP_BLOCK_SOFTIRQ_DEAD,
29 CPUHP_VIRT_SCSI_DEAD,
30 CPUHP_ACPI_CPUDRV_DEAD,
31 CPUHP_S390_PFAULT_DEAD,
32 CPUHP_BLK_MQ_DEAD,
33 CPUHP_WORKQUEUE_PREP,
34 CPUHP_POWER_NUMA_PREPARE,
35 CPUHP_HRTIMERS_PREPARE,
36 CPUHP_PROFILE_PREPARE,
37 CPUHP_X2APIC_PREPARE,
38 CPUHP_SMPCFD_PREPARE,
39 CPUHP_RELAY_PREPARE,
40 CPUHP_SLAB_PREPARE,
41 CPUHP_MD_RAID5_PREPARE,
42 CPUHP_RCUTREE_PREP,
43 CPUHP_CPUIDLE_COUPLED_PREPARE,
44 CPUHP_POWERPC_PMAC_PREPARE,
45 CPUHP_POWERPC_MMU_CTX_PREPARE,
46 CPUHP_XEN_PREPARE,
47 CPUHP_XEN_EVTCHN_PREPARE,
48 CPUHP_NOTIFY_PREPARE,
49 CPUHP_ARM_SHMOBILE_SCU_PREPARE,
50 CPUHP_SH_SH3X_PREPARE,
51 CPUHP_BLK_MQ_PREPARE,
52 CPUHP_TIMERS_DEAD,
53 CPUHP_NOTF_ERR_INJ_PREPARE,
54 CPUHP_MIPS_SOC_PREPARE,
55 CPUHP_BRINGUP_CPU,
56 CPUHP_AP_IDLE_DEAD,
57 CPUHP_AP_OFFLINE,
58 CPUHP_AP_SCHED_STARTING,
59 CPUHP_AP_RCUTREE_DYING,
60 CPUHP_AP_IRQ_GIC_STARTING,
61 CPUHP_AP_IRQ_GICV3_STARTING,
62 CPUHP_AP_IRQ_HIP04_STARTING,
63 CPUHP_AP_IRQ_ARMADA_XP_STARTING,
64 CPUHP_AP_IRQ_ARMADA_CASC_STARTING,
65 CPUHP_AP_IRQ_BCM2836_STARTING,
66 CPUHP_AP_ARM_MVEBU_COHERENCY,
67 CPUHP_AP_PERF_X86_UNCORE_STARTING,
68 CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
69 CPUHP_AP_PERF_X86_STARTING,
70 CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
71 CPUHP_AP_PERF_X86_CQM_STARTING,
72 CPUHP_AP_PERF_X86_CSTATE_STARTING,
73 CPUHP_AP_PERF_XTENSA_STARTING,
74 CPUHP_AP_PERF_METAG_STARTING,
75 CPUHP_AP_MIPS_OP_LOONGSON3_STARTING,
76 CPUHP_AP_ARM_VFP_STARTING,
77 CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING,
78 CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING,
79 CPUHP_AP_PERF_ARM_STARTING,
80 CPUHP_AP_ARM_L2X0_STARTING,
81 CPUHP_AP_ARM_ARCH_TIMER_STARTING,
82 CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
83 CPUHP_AP_DUMMY_TIMER_STARTING,
84 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
85 CPUHP_AP_ARM_TWD_STARTING,
86 CPUHP_AP_METAG_TIMER_STARTING,
87 CPUHP_AP_QCOM_TIMER_STARTING,
88 CPUHP_AP_ARMADA_TIMER_STARTING,
89 CPUHP_AP_MARCO_TIMER_STARTING,
90 CPUHP_AP_MIPS_GIC_TIMER_STARTING,
91 CPUHP_AP_ARC_TIMER_STARTING,
92 CPUHP_AP_KVM_STARTING,
93 CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
94 CPUHP_AP_KVM_ARM_VGIC_STARTING,
95 CPUHP_AP_KVM_ARM_TIMER_STARTING,
96 CPUHP_AP_ARM_XEN_STARTING,
97 CPUHP_AP_ARM_CORESIGHT_STARTING,
98 CPUHP_AP_ARM_CORESIGHT4_STARTING,
99 CPUHP_AP_ARM64_ISNDEP_STARTING,
100 CPUHP_AP_SMPCFD_DYING,
101 CPUHP_AP_X86_TBOOT_DYING,
102 CPUHP_AP_ONLINE,
103 CPUHP_TEARDOWN_CPU,
104 CPUHP_AP_ONLINE_IDLE,
105 CPUHP_AP_SMPBOOT_THREADS,
106 CPUHP_AP_X86_VDSO_VMA_ONLINE,
107 CPUHP_AP_PERF_ONLINE,
108 CPUHP_AP_PERF_X86_ONLINE,
109 CPUHP_AP_PERF_X86_UNCORE_ONLINE,
110 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
111 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
112 CPUHP_AP_PERF_X86_RAPL_ONLINE,
113 CPUHP_AP_PERF_X86_CQM_ONLINE,
114 CPUHP_AP_PERF_X86_CSTATE_ONLINE,
115 CPUHP_AP_PERF_S390_CF_ONLINE,
116 CPUHP_AP_PERF_S390_SF_ONLINE,
117 CPUHP_AP_PERF_ARM_CCI_ONLINE,
118 CPUHP_AP_PERF_ARM_CCN_ONLINE,
119 CPUHP_AP_PERF_ARM_L2X0_ONLINE,
120 CPUHP_AP_WORKQUEUE_ONLINE,
121 CPUHP_AP_RCUTREE_ONLINE,
122 CPUHP_AP_NOTIFY_ONLINE,
123 CPUHP_AP_ONLINE_DYN,
124 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30,
125 CPUHP_AP_X86_HPET_ONLINE,
126 CPUHP_AP_X86_KVM_CLK_ONLINE,
127 CPUHP_AP_ACTIVE,
128 CPUHP_ONLINE,
129 };
130
131 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
132 int (*startup)(unsigned int cpu),
133 int (*teardown)(unsigned int cpu), bool multi_instance);
134
135 /**
136 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
137 * @state: The state for which the calls are installed
138 * @name: Name of the callback (will be used in debug output)
139 * @startup: startup callback function
140 * @teardown: teardown callback function
141 *
142 * Installs the callback functions and invokes the startup callback on
143 * the present cpus which have already reached the @state.
144 */
145 static inline int cpuhp_setup_state(enum cpuhp_state state,
146 const char *name,
147 int (*startup)(unsigned int cpu),
148 int (*teardown)(unsigned int cpu))
149 {
150 return __cpuhp_setup_state(state, name, true, startup, teardown, false);
151 }
152
153 /**
154 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
155 * callbacks
156 * @state: The state for which the calls are installed
157 * @name: Name of the callback.
158 * @startup: startup callback function
159 * @teardown: teardown callback function
160 *
161 * Same as @cpuhp_setup_state except that no calls are executed are invoked
162 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
163 */
164 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
165 const char *name,
166 int (*startup)(unsigned int cpu),
167 int (*teardown)(unsigned int cpu))
168 {
169 return __cpuhp_setup_state(state, name, false, startup, teardown,
170 false);
171 }
172
173 /**
174 * cpuhp_setup_state_multi - Add callbacks for multi state
175 * @state: The state for which the calls are installed
176 * @name: Name of the callback.
177 * @startup: startup callback function
178 * @teardown: teardown callback function
179 *
180 * Sets the internal multi_instance flag and prepares a state to work as a multi
181 * instance callback. No callbacks are invoked at this point. The callbacks are
182 * invoked once an instance for this state are registered via
183 * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls.
184 */
185 static inline int cpuhp_setup_state_multi(enum cpuhp_state state,
186 const char *name,
187 int (*startup)(unsigned int cpu,
188 struct hlist_node *node),
189 int (*teardown)(unsigned int cpu,
190 struct hlist_node *node))
191 {
192 return __cpuhp_setup_state(state, name, false,
193 (void *) startup,
194 (void *) teardown, true);
195 }
196
197 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
198 bool invoke);
199
200 /**
201 * cpuhp_state_add_instance - Add an instance for a state and invoke startup
202 * callback.
203 * @state: The state for which the instance is installed
204 * @node: The node for this individual state.
205 *
206 * Installs the instance for the @state and invokes the startup callback on
207 * the present cpus which have already reached the @state. The @state must have
208 * been earlier marked as multi-instance by @cpuhp_setup_state_multi.
209 */
210 static inline int cpuhp_state_add_instance(enum cpuhp_state state,
211 struct hlist_node *node)
212 {
213 return __cpuhp_state_add_instance(state, node, true);
214 }
215
216 /**
217 * cpuhp_state_add_instance_nocalls - Add an instance for a state without
218 * invoking the startup callback.
219 * @state: The state for which the instance is installed
220 * @node: The node for this individual state.
221 *
222 * Installs the instance for the @state The @state must have been earlier
223 * marked as multi-instance by @cpuhp_setup_state_multi.
224 */
225 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state,
226 struct hlist_node *node)
227 {
228 return __cpuhp_state_add_instance(state, node, false);
229 }
230
231 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
232
233 /**
234 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
235 * @state: The state for which the calls are removed
236 *
237 * Removes the callback functions and invokes the teardown callback on
238 * the present cpus which have already reached the @state.
239 */
240 static inline void cpuhp_remove_state(enum cpuhp_state state)
241 {
242 __cpuhp_remove_state(state, true);
243 }
244
245 /**
246 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
247 * teardown
248 * @state: The state for which the calls are removed
249 */
250 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
251 {
252 __cpuhp_remove_state(state, false);
253 }
254
255 /**
256 * cpuhp_remove_multi_state - Remove hotplug multi state callback
257 * @state: The state for which the calls are removed
258 *
259 * Removes the callback functions from a multi state. This is the reverse of
260 * cpuhp_setup_state_multi(). All instances should have been removed before
261 * invoking this function.
262 */
263 static inline void cpuhp_remove_multi_state(enum cpuhp_state state)
264 {
265 __cpuhp_remove_state(state, false);
266 }
267
268 int __cpuhp_state_remove_instance(enum cpuhp_state state,
269 struct hlist_node *node, bool invoke);
270
271 /**
272 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke
273 * the teardown callback
274 * @state: The state from which the instance is removed
275 * @node: The node for this individual state.
276 *
277 * Removes the instance and invokes the teardown callback on the present cpus
278 * which have already reached the @state.
279 */
280 static inline int cpuhp_state_remove_instance(enum cpuhp_state state,
281 struct hlist_node *node)
282 {
283 return __cpuhp_state_remove_instance(state, node, true);
284 }
285
286 /**
287 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state
288 * without invoking the reatdown callback
289 * @state: The state from which the instance is removed
290 * @node: The node for this individual state.
291 *
292 * Removes the instance without invoking the teardown callback.
293 */
294 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,
295 struct hlist_node *node)
296 {
297 return __cpuhp_state_remove_instance(state, node, false);
298 }
299
300 #ifdef CONFIG_SMP
301 void cpuhp_online_idle(enum cpuhp_state state);
302 #else
303 static inline void cpuhp_online_idle(enum cpuhp_state state) { }
304 #endif
305
306 #endif