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_JCORE_TIMER_STARTING, 85 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING, 86 CPUHP_AP_ARM_TWD_STARTING, 87 CPUHP_AP_METAG_TIMER_STARTING, 88 CPUHP_AP_QCOM_TIMER_STARTING, 89 CPUHP_AP_ARMADA_TIMER_STARTING, 90 CPUHP_AP_MARCO_TIMER_STARTING, 91 CPUHP_AP_MIPS_GIC_TIMER_STARTING, 92 CPUHP_AP_ARC_TIMER_STARTING, 93 CPUHP_AP_KVM_STARTING, 94 CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING, 95 CPUHP_AP_KVM_ARM_VGIC_STARTING, 96 CPUHP_AP_KVM_ARM_TIMER_STARTING, 97 CPUHP_AP_ARM_XEN_STARTING, 98 CPUHP_AP_ARM_CORESIGHT_STARTING, 99 CPUHP_AP_ARM_CORESIGHT4_STARTING, 100 CPUHP_AP_ARM64_ISNDEP_STARTING, 101 CPUHP_AP_SMPCFD_DYING, 102 CPUHP_AP_X86_TBOOT_DYING, 103 CPUHP_AP_ONLINE, 104 CPUHP_TEARDOWN_CPU, 105 CPUHP_AP_ONLINE_IDLE, 106 CPUHP_AP_SMPBOOT_THREADS, 107 CPUHP_AP_X86_VDSO_VMA_ONLINE, 108 CPUHP_AP_PERF_ONLINE, 109 CPUHP_AP_PERF_X86_ONLINE, 110 CPUHP_AP_PERF_X86_UNCORE_ONLINE, 111 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE, 112 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE, 113 CPUHP_AP_PERF_X86_RAPL_ONLINE, 114 CPUHP_AP_PERF_X86_CQM_ONLINE, 115 CPUHP_AP_PERF_X86_CSTATE_ONLINE, 116 CPUHP_AP_PERF_S390_CF_ONLINE, 117 CPUHP_AP_PERF_S390_SF_ONLINE, 118 CPUHP_AP_PERF_ARM_CCI_ONLINE, 119 CPUHP_AP_PERF_ARM_CCN_ONLINE, 120 CPUHP_AP_PERF_ARM_L2X0_ONLINE, 121 CPUHP_AP_WORKQUEUE_ONLINE, 122 CPUHP_AP_RCUTREE_ONLINE, 123 CPUHP_AP_NOTIFY_ONLINE, 124 CPUHP_AP_ONLINE_DYN, 125 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30, 126 CPUHP_AP_X86_HPET_ONLINE, 127 CPUHP_AP_X86_KVM_CLK_ONLINE, 128 CPUHP_AP_ACTIVE, 129 CPUHP_ONLINE, 130 }; 131 132 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke, 133 int (*startup)(unsigned int cpu), 134 int (*teardown)(unsigned int cpu), bool multi_instance); 135 136 /** 137 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks 138 * @state: The state for which the calls are installed 139 * @name: Name of the callback (will be used in debug output) 140 * @startup: startup callback function 141 * @teardown: teardown callback function 142 * 143 * Installs the callback functions and invokes the startup callback on 144 * the present cpus which have already reached the @state. 145 */ 146 static inline int cpuhp_setup_state(enum cpuhp_state state, 147 const char *name, 148 int (*startup)(unsigned int cpu), 149 int (*teardown)(unsigned int cpu)) 150 { 151 return __cpuhp_setup_state(state, name, true, startup, teardown, false); 152 } 153 154 /** 155 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the 156 * callbacks 157 * @state: The state for which the calls are installed 158 * @name: Name of the callback. 159 * @startup: startup callback function 160 * @teardown: teardown callback function 161 * 162 * Same as @cpuhp_setup_state except that no calls are executed are invoked 163 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n. 164 */ 165 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, 166 const char *name, 167 int (*startup)(unsigned int cpu), 168 int (*teardown)(unsigned int cpu)) 169 { 170 return __cpuhp_setup_state(state, name, false, startup, teardown, 171 false); 172 } 173 174 /** 175 * cpuhp_setup_state_multi - Add callbacks for multi state 176 * @state: The state for which the calls are installed 177 * @name: Name of the callback. 178 * @startup: startup callback function 179 * @teardown: teardown callback function 180 * 181 * Sets the internal multi_instance flag and prepares a state to work as a multi 182 * instance callback. No callbacks are invoked at this point. The callbacks are 183 * invoked once an instance for this state are registered via 184 * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls. 185 */ 186 static inline int cpuhp_setup_state_multi(enum cpuhp_state state, 187 const char *name, 188 int (*startup)(unsigned int cpu, 189 struct hlist_node *node), 190 int (*teardown)(unsigned int cpu, 191 struct hlist_node *node)) 192 { 193 return __cpuhp_setup_state(state, name, false, 194 (void *) startup, 195 (void *) teardown, true); 196 } 197 198 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node, 199 bool invoke); 200 201 /** 202 * cpuhp_state_add_instance - Add an instance for a state and invoke startup 203 * callback. 204 * @state: The state for which the instance is installed 205 * @node: The node for this individual state. 206 * 207 * Installs the instance for the @state and invokes the startup callback on 208 * the present cpus which have already reached the @state. The @state must have 209 * been earlier marked as multi-instance by @cpuhp_setup_state_multi. 210 */ 211 static inline int cpuhp_state_add_instance(enum cpuhp_state state, 212 struct hlist_node *node) 213 { 214 return __cpuhp_state_add_instance(state, node, true); 215 } 216 217 /** 218 * cpuhp_state_add_instance_nocalls - Add an instance for a state without 219 * invoking the startup callback. 220 * @state: The state for which the instance is installed 221 * @node: The node for this individual state. 222 * 223 * Installs the instance for the @state The @state must have been earlier 224 * marked as multi-instance by @cpuhp_setup_state_multi. 225 */ 226 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state, 227 struct hlist_node *node) 228 { 229 return __cpuhp_state_add_instance(state, node, false); 230 } 231 232 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); 233 234 /** 235 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown 236 * @state: The state for which the calls are removed 237 * 238 * Removes the callback functions and invokes the teardown callback on 239 * the present cpus which have already reached the @state. 240 */ 241 static inline void cpuhp_remove_state(enum cpuhp_state state) 242 { 243 __cpuhp_remove_state(state, true); 244 } 245 246 /** 247 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking 248 * teardown 249 * @state: The state for which the calls are removed 250 */ 251 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) 252 { 253 __cpuhp_remove_state(state, false); 254 } 255 256 /** 257 * cpuhp_remove_multi_state - Remove hotplug multi state callback 258 * @state: The state for which the calls are removed 259 * 260 * Removes the callback functions from a multi state. This is the reverse of 261 * cpuhp_setup_state_multi(). All instances should have been removed before 262 * invoking this function. 263 */ 264 static inline void cpuhp_remove_multi_state(enum cpuhp_state state) 265 { 266 __cpuhp_remove_state(state, false); 267 } 268 269 int __cpuhp_state_remove_instance(enum cpuhp_state state, 270 struct hlist_node *node, bool invoke); 271 272 /** 273 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke 274 * the teardown callback 275 * @state: The state from which the instance is removed 276 * @node: The node for this individual state. 277 * 278 * Removes the instance and invokes the teardown callback on the present cpus 279 * which have already reached the @state. 280 */ 281 static inline int cpuhp_state_remove_instance(enum cpuhp_state state, 282 struct hlist_node *node) 283 { 284 return __cpuhp_state_remove_instance(state, node, true); 285 } 286 287 /** 288 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state 289 * without invoking the reatdown callback 290 * @state: The state from which the instance is removed 291 * @node: The node for this individual state. 292 * 293 * Removes the instance without invoking the teardown callback. 294 */ 295 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state, 296 struct hlist_node *node) 297 { 298 return __cpuhp_state_remove_instance(state, node, false); 299 } 300 301 #ifdef CONFIG_SMP 302 void cpuhp_online_idle(enum cpuhp_state state); 303 #else 304 static inline void cpuhp_online_idle(enum cpuhp_state state) { } 305 #endif 306 307 #endif 308