Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify |
| 3 | * it under the terms of the GNU General Public License version 2 as |
| 4 | * published by the Free Software Foundation. |
| 5 | * |
| 6 | * This program is distributed in the hope that it will be useful, |
| 7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 9 | * GNU General Public License for more details. |
| 10 | * |
| 11 | * Copyright (C) 2013 ARM Limited |
| 12 | * |
| 13 | * Author: Will Deacon <will.deacon@arm.com> |
| 14 | */ |
| 15 | |
| 16 | #define pr_fmt(fmt) "psci: " fmt |
| 17 | |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/of.h> |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 20 | #include <linux/smp.h> |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 21 | #include <linux/reboot.h> |
| 22 | #include <linux/pm.h> |
Ashwin Chaugule | c814ca0 | 2014-05-07 10:18:36 -0400 | [diff] [blame^] | 23 | #include <linux/delay.h> |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 24 | #include <uapi/linux/psci.h> |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 25 | |
| 26 | #include <asm/compiler.h> |
Mark Rutland | cd1aebf | 2013-10-24 20:30:15 +0100 | [diff] [blame] | 27 | #include <asm/cpu_ops.h> |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 28 | #include <asm/errno.h> |
| 29 | #include <asm/psci.h> |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 30 | #include <asm/smp_plat.h> |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 31 | #include <asm/system_misc.h> |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 32 | |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 33 | #define PSCI_POWER_STATE_TYPE_STANDBY 0 |
| 34 | #define PSCI_POWER_STATE_TYPE_POWER_DOWN 1 |
| 35 | |
| 36 | struct psci_power_state { |
| 37 | u16 id; |
| 38 | u8 type; |
| 39 | u8 affinity_level; |
| 40 | }; |
| 41 | |
| 42 | struct psci_operations { |
| 43 | int (*cpu_suspend)(struct psci_power_state state, |
| 44 | unsigned long entry_point); |
| 45 | int (*cpu_off)(struct psci_power_state state); |
| 46 | int (*cpu_on)(unsigned long cpuid, unsigned long entry_point); |
| 47 | int (*migrate)(unsigned long cpuid); |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 48 | int (*affinity_info)(unsigned long target_affinity, |
| 49 | unsigned long lowest_affinity_level); |
| 50 | int (*migrate_info_type)(void); |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 51 | }; |
| 52 | |
| 53 | static struct psci_operations psci_ops; |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 54 | |
| 55 | static int (*invoke_psci_fn)(u64, u64, u64, u64); |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 56 | typedef int (*psci_initcall_t)(const struct device_node *); |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 57 | |
| 58 | enum psci_function { |
| 59 | PSCI_FN_CPU_SUSPEND, |
| 60 | PSCI_FN_CPU_ON, |
| 61 | PSCI_FN_CPU_OFF, |
| 62 | PSCI_FN_MIGRATE, |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 63 | PSCI_FN_AFFINITY_INFO, |
| 64 | PSCI_FN_MIGRATE_INFO_TYPE, |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 65 | PSCI_FN_MAX, |
| 66 | }; |
| 67 | |
| 68 | static u32 psci_function_id[PSCI_FN_MAX]; |
| 69 | |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 70 | static int psci_to_linux_errno(int errno) |
| 71 | { |
| 72 | switch (errno) { |
| 73 | case PSCI_RET_SUCCESS: |
| 74 | return 0; |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 75 | case PSCI_RET_NOT_SUPPORTED: |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 76 | return -EOPNOTSUPP; |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 77 | case PSCI_RET_INVALID_PARAMS: |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 78 | return -EINVAL; |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 79 | case PSCI_RET_DENIED: |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 80 | return -EPERM; |
| 81 | }; |
| 82 | |
| 83 | return -EINVAL; |
| 84 | } |
| 85 | |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 86 | static u32 psci_power_state_pack(struct psci_power_state state) |
| 87 | { |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 88 | return ((state.id << PSCI_0_2_POWER_STATE_ID_SHIFT) |
| 89 | & PSCI_0_2_POWER_STATE_ID_MASK) | |
| 90 | ((state.type << PSCI_0_2_POWER_STATE_TYPE_SHIFT) |
| 91 | & PSCI_0_2_POWER_STATE_TYPE_MASK) | |
| 92 | ((state.affinity_level << PSCI_0_2_POWER_STATE_AFFL_SHIFT) |
| 93 | & PSCI_0_2_POWER_STATE_AFFL_MASK); |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | /* |
| 97 | * The following two functions are invoked via the invoke_psci_fn pointer |
| 98 | * and will not be inlined, allowing us to piggyback on the AAPCS. |
| 99 | */ |
| 100 | static noinline int __invoke_psci_fn_hvc(u64 function_id, u64 arg0, u64 arg1, |
| 101 | u64 arg2) |
| 102 | { |
| 103 | asm volatile( |
| 104 | __asmeq("%0", "x0") |
| 105 | __asmeq("%1", "x1") |
| 106 | __asmeq("%2", "x2") |
| 107 | __asmeq("%3", "x3") |
| 108 | "hvc #0\n" |
| 109 | : "+r" (function_id) |
| 110 | : "r" (arg0), "r" (arg1), "r" (arg2)); |
| 111 | |
| 112 | return function_id; |
| 113 | } |
| 114 | |
| 115 | static noinline int __invoke_psci_fn_smc(u64 function_id, u64 arg0, u64 arg1, |
| 116 | u64 arg2) |
| 117 | { |
| 118 | asm volatile( |
| 119 | __asmeq("%0", "x0") |
| 120 | __asmeq("%1", "x1") |
| 121 | __asmeq("%2", "x2") |
| 122 | __asmeq("%3", "x3") |
| 123 | "smc #0\n" |
| 124 | : "+r" (function_id) |
| 125 | : "r" (arg0), "r" (arg1), "r" (arg2)); |
| 126 | |
| 127 | return function_id; |
| 128 | } |
| 129 | |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 130 | static int psci_get_version(void) |
| 131 | { |
| 132 | int err; |
| 133 | |
| 134 | err = invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0); |
| 135 | return err; |
| 136 | } |
| 137 | |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 138 | static int psci_cpu_suspend(struct psci_power_state state, |
| 139 | unsigned long entry_point) |
| 140 | { |
| 141 | int err; |
| 142 | u32 fn, power_state; |
| 143 | |
| 144 | fn = psci_function_id[PSCI_FN_CPU_SUSPEND]; |
| 145 | power_state = psci_power_state_pack(state); |
| 146 | err = invoke_psci_fn(fn, power_state, entry_point, 0); |
| 147 | return psci_to_linux_errno(err); |
| 148 | } |
| 149 | |
| 150 | static int psci_cpu_off(struct psci_power_state state) |
| 151 | { |
| 152 | int err; |
| 153 | u32 fn, power_state; |
| 154 | |
| 155 | fn = psci_function_id[PSCI_FN_CPU_OFF]; |
| 156 | power_state = psci_power_state_pack(state); |
| 157 | err = invoke_psci_fn(fn, power_state, 0, 0); |
| 158 | return psci_to_linux_errno(err); |
| 159 | } |
| 160 | |
| 161 | static int psci_cpu_on(unsigned long cpuid, unsigned long entry_point) |
| 162 | { |
| 163 | int err; |
| 164 | u32 fn; |
| 165 | |
| 166 | fn = psci_function_id[PSCI_FN_CPU_ON]; |
| 167 | err = invoke_psci_fn(fn, cpuid, entry_point, 0); |
| 168 | return psci_to_linux_errno(err); |
| 169 | } |
| 170 | |
| 171 | static int psci_migrate(unsigned long cpuid) |
| 172 | { |
| 173 | int err; |
| 174 | u32 fn; |
| 175 | |
| 176 | fn = psci_function_id[PSCI_FN_MIGRATE]; |
| 177 | err = invoke_psci_fn(fn, cpuid, 0, 0); |
| 178 | return psci_to_linux_errno(err); |
| 179 | } |
| 180 | |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 181 | static int psci_affinity_info(unsigned long target_affinity, |
| 182 | unsigned long lowest_affinity_level) |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 183 | { |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 184 | int err; |
| 185 | u32 fn; |
| 186 | |
| 187 | fn = psci_function_id[PSCI_FN_AFFINITY_INFO]; |
| 188 | err = invoke_psci_fn(fn, target_affinity, lowest_affinity_level, 0); |
| 189 | return err; |
| 190 | } |
| 191 | |
| 192 | static int psci_migrate_info_type(void) |
| 193 | { |
| 194 | int err; |
| 195 | u32 fn; |
| 196 | |
| 197 | fn = psci_function_id[PSCI_FN_MIGRATE_INFO_TYPE]; |
| 198 | err = invoke_psci_fn(fn, 0, 0, 0); |
| 199 | return err; |
| 200 | } |
| 201 | |
| 202 | static int get_set_conduit_method(struct device_node *np) |
| 203 | { |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 204 | const char *method; |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 205 | |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 206 | pr_info("probing for conduit method from DT.\n"); |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 207 | |
| 208 | if (of_property_read_string(np, "method", &method)) { |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 209 | pr_warn("missing \"method\" property\n"); |
| 210 | return -ENXIO; |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | if (!strcmp("hvc", method)) { |
| 214 | invoke_psci_fn = __invoke_psci_fn_hvc; |
| 215 | } else if (!strcmp("smc", method)) { |
| 216 | invoke_psci_fn = __invoke_psci_fn_smc; |
| 217 | } else { |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 218 | pr_warn("invalid \"method\" property: %s\n", method); |
| 219 | return -EINVAL; |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 220 | } |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | static void psci_sys_reset(enum reboot_mode reboot_mode, const char *cmd) |
| 225 | { |
| 226 | invoke_psci_fn(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0); |
| 227 | } |
| 228 | |
| 229 | static void psci_sys_poweroff(void) |
| 230 | { |
| 231 | invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0); |
| 232 | } |
| 233 | |
| 234 | /* |
| 235 | * PSCI Function IDs for v0.2+ are well defined so use |
| 236 | * standard values. |
| 237 | */ |
| 238 | static int psci_0_2_init(struct device_node *np) |
| 239 | { |
| 240 | int err, ver; |
| 241 | |
| 242 | err = get_set_conduit_method(np); |
| 243 | |
| 244 | if (err) |
| 245 | goto out_put_node; |
| 246 | |
| 247 | ver = psci_get_version(); |
| 248 | |
| 249 | if (ver == PSCI_RET_NOT_SUPPORTED) { |
| 250 | /* PSCI v0.2 mandates implementation of PSCI_ID_VERSION. */ |
| 251 | pr_err("PSCI firmware does not comply with the v0.2 spec.\n"); |
| 252 | err = -EOPNOTSUPP; |
| 253 | goto out_put_node; |
| 254 | } else { |
| 255 | pr_info("PSCIv%d.%d detected in firmware.\n", |
| 256 | PSCI_VERSION_MAJOR(ver), |
| 257 | PSCI_VERSION_MINOR(ver)); |
| 258 | |
| 259 | if (PSCI_VERSION_MAJOR(ver) == 0 && |
| 260 | PSCI_VERSION_MINOR(ver) < 2) { |
| 261 | err = -EINVAL; |
| 262 | pr_err("Conflicting PSCI version detected.\n"); |
| 263 | goto out_put_node; |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | pr_info("Using standard PSCI v0.2 function IDs\n"); |
| 268 | psci_function_id[PSCI_FN_CPU_SUSPEND] = PSCI_0_2_FN64_CPU_SUSPEND; |
| 269 | psci_ops.cpu_suspend = psci_cpu_suspend; |
| 270 | |
| 271 | psci_function_id[PSCI_FN_CPU_OFF] = PSCI_0_2_FN_CPU_OFF; |
| 272 | psci_ops.cpu_off = psci_cpu_off; |
| 273 | |
| 274 | psci_function_id[PSCI_FN_CPU_ON] = PSCI_0_2_FN64_CPU_ON; |
| 275 | psci_ops.cpu_on = psci_cpu_on; |
| 276 | |
| 277 | psci_function_id[PSCI_FN_MIGRATE] = PSCI_0_2_FN64_MIGRATE; |
| 278 | psci_ops.migrate = psci_migrate; |
| 279 | |
| 280 | psci_function_id[PSCI_FN_AFFINITY_INFO] = PSCI_0_2_FN64_AFFINITY_INFO; |
| 281 | psci_ops.affinity_info = psci_affinity_info; |
| 282 | |
| 283 | psci_function_id[PSCI_FN_MIGRATE_INFO_TYPE] = |
| 284 | PSCI_0_2_FN_MIGRATE_INFO_TYPE; |
| 285 | psci_ops.migrate_info_type = psci_migrate_info_type; |
| 286 | |
| 287 | arm_pm_restart = psci_sys_reset; |
| 288 | |
| 289 | pm_power_off = psci_sys_poweroff; |
| 290 | |
| 291 | out_put_node: |
| 292 | of_node_put(np); |
| 293 | return err; |
| 294 | } |
| 295 | |
| 296 | /* |
| 297 | * PSCI < v0.2 get PSCI Function IDs via DT. |
| 298 | */ |
| 299 | static int psci_0_1_init(struct device_node *np) |
| 300 | { |
| 301 | u32 id; |
| 302 | int err; |
| 303 | |
| 304 | err = get_set_conduit_method(np); |
| 305 | |
| 306 | if (err) |
| 307 | goto out_put_node; |
| 308 | |
| 309 | pr_info("Using PSCI v0.1 Function IDs from DT\n"); |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 310 | |
| 311 | if (!of_property_read_u32(np, "cpu_suspend", &id)) { |
| 312 | psci_function_id[PSCI_FN_CPU_SUSPEND] = id; |
| 313 | psci_ops.cpu_suspend = psci_cpu_suspend; |
| 314 | } |
| 315 | |
| 316 | if (!of_property_read_u32(np, "cpu_off", &id)) { |
| 317 | psci_function_id[PSCI_FN_CPU_OFF] = id; |
| 318 | psci_ops.cpu_off = psci_cpu_off; |
| 319 | } |
| 320 | |
| 321 | if (!of_property_read_u32(np, "cpu_on", &id)) { |
| 322 | psci_function_id[PSCI_FN_CPU_ON] = id; |
| 323 | psci_ops.cpu_on = psci_cpu_on; |
| 324 | } |
| 325 | |
| 326 | if (!of_property_read_u32(np, "migrate", &id)) { |
| 327 | psci_function_id[PSCI_FN_MIGRATE] = id; |
| 328 | psci_ops.migrate = psci_migrate; |
| 329 | } |
| 330 | |
| 331 | out_put_node: |
| 332 | of_node_put(np); |
Ashwin Chaugule | e71246a | 2014-04-17 14:38:41 -0400 | [diff] [blame] | 333 | return err; |
| 334 | } |
| 335 | |
| 336 | static const struct of_device_id psci_of_match[] __initconst = { |
| 337 | { .compatible = "arm,psci", .data = psci_0_1_init}, |
| 338 | { .compatible = "arm,psci-0.2", .data = psci_0_2_init}, |
| 339 | {}, |
| 340 | }; |
| 341 | |
| 342 | int __init psci_init(void) |
| 343 | { |
| 344 | struct device_node *np; |
| 345 | const struct of_device_id *matched_np; |
| 346 | psci_initcall_t init_fn; |
| 347 | |
| 348 | np = of_find_matching_node_and_match(NULL, psci_of_match, &matched_np); |
| 349 | |
| 350 | if (!np) |
| 351 | return -ENODEV; |
| 352 | |
| 353 | init_fn = (psci_initcall_t)matched_np->data; |
| 354 | return init_fn(np); |
Will Deacon | e790f1d | 2012-12-18 17:53:14 +0000 | [diff] [blame] | 355 | } |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 356 | |
| 357 | #ifdef CONFIG_SMP |
| 358 | |
Mark Rutland | cd1aebf | 2013-10-24 20:30:15 +0100 | [diff] [blame] | 359 | static int __init cpu_psci_cpu_init(struct device_node *dn, unsigned int cpu) |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 360 | { |
| 361 | return 0; |
| 362 | } |
| 363 | |
Mark Rutland | cd1aebf | 2013-10-24 20:30:15 +0100 | [diff] [blame] | 364 | static int __init cpu_psci_cpu_prepare(unsigned int cpu) |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 365 | { |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 366 | if (!psci_ops.cpu_on) { |
| 367 | pr_err("no cpu_on method, not booting CPU%d\n", cpu); |
| 368 | return -ENODEV; |
| 369 | } |
| 370 | |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 371 | return 0; |
| 372 | } |
| 373 | |
Mark Rutland | 652af89 | 2013-10-24 20:30:16 +0100 | [diff] [blame] | 374 | static int cpu_psci_cpu_boot(unsigned int cpu) |
| 375 | { |
| 376 | int err = psci_ops.cpu_on(cpu_logical_map(cpu), __pa(secondary_entry)); |
| 377 | if (err) |
Vladimir Murzin | 288ac26 | 2014-02-28 09:57:47 +0000 | [diff] [blame] | 378 | pr_err("failed to boot CPU%d (%d)\n", cpu, err); |
Mark Rutland | 652af89 | 2013-10-24 20:30:16 +0100 | [diff] [blame] | 379 | |
| 380 | return err; |
| 381 | } |
| 382 | |
Mark Rutland | 831ccf7 | 2013-10-24 20:30:19 +0100 | [diff] [blame] | 383 | #ifdef CONFIG_HOTPLUG_CPU |
| 384 | static int cpu_psci_cpu_disable(unsigned int cpu) |
| 385 | { |
| 386 | /* Fail early if we don't have CPU_OFF support */ |
| 387 | if (!psci_ops.cpu_off) |
| 388 | return -EOPNOTSUPP; |
| 389 | return 0; |
| 390 | } |
| 391 | |
| 392 | static void cpu_psci_cpu_die(unsigned int cpu) |
| 393 | { |
| 394 | int ret; |
| 395 | /* |
| 396 | * There are no known implementations of PSCI actually using the |
| 397 | * power state field, pass a sensible default for now. |
| 398 | */ |
| 399 | struct psci_power_state state = { |
| 400 | .type = PSCI_POWER_STATE_TYPE_POWER_DOWN, |
| 401 | }; |
| 402 | |
| 403 | ret = psci_ops.cpu_off(state); |
| 404 | |
Vladimir Murzin | 288ac26 | 2014-02-28 09:57:47 +0000 | [diff] [blame] | 405 | pr_crit("unable to power off CPU%u (%d)\n", cpu, ret); |
Mark Rutland | 831ccf7 | 2013-10-24 20:30:19 +0100 | [diff] [blame] | 406 | } |
Ashwin Chaugule | c814ca0 | 2014-05-07 10:18:36 -0400 | [diff] [blame^] | 407 | |
| 408 | static int cpu_psci_cpu_kill(unsigned int cpu) |
| 409 | { |
| 410 | int err, i; |
| 411 | |
| 412 | if (!psci_ops.affinity_info) |
| 413 | return 1; |
| 414 | /* |
| 415 | * cpu_kill could race with cpu_die and we can |
| 416 | * potentially end up declaring this cpu undead |
| 417 | * while it is dying. So, try again a few times. |
| 418 | */ |
| 419 | |
| 420 | for (i = 0; i < 10; i++) { |
| 421 | err = psci_ops.affinity_info(cpu_logical_map(cpu), 0); |
| 422 | if (err == PSCI_0_2_AFFINITY_LEVEL_OFF) { |
| 423 | pr_info("CPU%d killed.\n", cpu); |
| 424 | return 1; |
| 425 | } |
| 426 | |
| 427 | msleep(10); |
| 428 | pr_info("Retrying again to check for CPU kill\n"); |
| 429 | } |
| 430 | |
| 431 | pr_warn("CPU%d may not have shut down cleanly (AFFINITY_INFO reports %d)\n", |
| 432 | cpu, err); |
| 433 | /* Make op_cpu_kill() fail. */ |
| 434 | return 0; |
| 435 | } |
Mark Rutland | 831ccf7 | 2013-10-24 20:30:19 +0100 | [diff] [blame] | 436 | #endif |
| 437 | |
Mark Rutland | cd1aebf | 2013-10-24 20:30:15 +0100 | [diff] [blame] | 438 | const struct cpu_operations cpu_psci_ops = { |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 439 | .name = "psci", |
Mark Rutland | cd1aebf | 2013-10-24 20:30:15 +0100 | [diff] [blame] | 440 | .cpu_init = cpu_psci_cpu_init, |
| 441 | .cpu_prepare = cpu_psci_cpu_prepare, |
Mark Rutland | 652af89 | 2013-10-24 20:30:16 +0100 | [diff] [blame] | 442 | .cpu_boot = cpu_psci_cpu_boot, |
Mark Rutland | 831ccf7 | 2013-10-24 20:30:19 +0100 | [diff] [blame] | 443 | #ifdef CONFIG_HOTPLUG_CPU |
| 444 | .cpu_disable = cpu_psci_cpu_disable, |
| 445 | .cpu_die = cpu_psci_cpu_die, |
Ashwin Chaugule | c814ca0 | 2014-05-07 10:18:36 -0400 | [diff] [blame^] | 446 | .cpu_kill = cpu_psci_cpu_kill, |
Mark Rutland | 831ccf7 | 2013-10-24 20:30:19 +0100 | [diff] [blame] | 447 | #endif |
Mark Rutland | 00ef54b | 2013-10-24 20:30:14 +0100 | [diff] [blame] | 448 | }; |
| 449 | |
| 450 | #endif |