Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or |
| 3 | * modify it under the terms of the GNU General Public License |
| 4 | * as published by the Free Software Foundation; either version 2 |
| 5 | * of the License, or (at your option) any later version. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | * You should have received a copy of the GNU General Public License |
| 13 | * along with this program; if not, write to the Free Software |
| 14 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 15 | * |
| 16 | * Copyright (C) 2000, 2001 Kanoj Sarcar |
| 17 | * Copyright (C) 2000, 2001 Ralf Baechle |
| 18 | * Copyright (C) 2000, 2001 Silicon Graphics, Inc. |
| 19 | * Copyright (C) 2000, 2001, 2003 Broadcom Corporation |
| 20 | */ |
| 21 | #include <linux/cache.h> |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/interrupt.h> |
Ralf Baechle | 631330f | 2009-06-19 14:05:26 +0100 | [diff] [blame] | 25 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/spinlock.h> |
| 27 | #include <linux/threads.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/time.h> |
| 30 | #include <linux/timex.h> |
| 31 | #include <linux/sched.h> |
| 32 | #include <linux/cpumask.h> |
Rojhalat Ibrahim | 1e35aab | 2006-02-20 13:35:27 +0000 | [diff] [blame] | 33 | #include <linux/cpu.h> |
Alexey Dobriyan | 4e950f6 | 2007-07-30 02:36:13 +0400 | [diff] [blame] | 34 | #include <linux/err.h> |
Wu Zhangjin | 8f99a16 | 2009-11-20 20:34:33 +0800 | [diff] [blame] | 35 | #include <linux/ftrace.h> |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 36 | #include <linux/irqdomain.h> |
| 37 | #include <linux/of.h> |
| 38 | #include <linux/of_irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 40 | #include <linux/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <asm/cpu.h> |
| 42 | #include <asm/processor.h> |
Ralf Baechle | bdc92d74 | 2013-05-21 16:59:19 +0200 | [diff] [blame] | 43 | #include <asm/idle.h> |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 44 | #include <asm/r4k-timer.h> |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 45 | #include <asm/mips-cpc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <asm/mmu_context.h> |
Ralf Baechle | 7bcf771 | 2007-10-11 23:46:09 +0100 | [diff] [blame] | 47 | #include <asm/time.h> |
David Howells | b81947c | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 48 | #include <asm/setup.h> |
Paul Burton | e060f6e | 2015-09-25 08:59:38 -0700 | [diff] [blame] | 49 | #include <asm/maar.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Ralf Baechle | cafb45b | 2015-05-12 06:43:04 +0200 | [diff] [blame] | 51 | cpumask_t cpu_callin_map; /* Bitmask of started secondaries */ |
David Daney | 2dc2ae3 | 2010-07-23 18:41:45 -0700 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | int __cpu_number_map[NR_CPUS]; /* Map physical to logical */ |
David Daney | 2dc2ae3 | 2010-07-23 18:41:45 -0700 | [diff] [blame] | 54 | EXPORT_SYMBOL(__cpu_number_map); |
| 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | int __cpu_logical_map[NR_CPUS]; /* Map logical to physical */ |
David Daney | 2dc2ae3 | 2010-07-23 18:41:45 -0700 | [diff] [blame] | 57 | EXPORT_SYMBOL(__cpu_logical_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Ralf Baechle | 0ab7aef | 2007-03-02 20:42:04 +0000 | [diff] [blame] | 59 | /* Number of TCs (or siblings in Intel speak) per CPU core */ |
| 60 | int smp_num_siblings = 1; |
| 61 | EXPORT_SYMBOL(smp_num_siblings); |
| 62 | |
| 63 | /* representing the TCs (or siblings in Intel speak) of each logical CPU */ |
| 64 | cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly; |
| 65 | EXPORT_SYMBOL(cpu_sibling_map); |
| 66 | |
Huacai Chen | bda4584 | 2014-06-26 11:41:26 +0800 | [diff] [blame] | 67 | /* representing the core map of multi-core chips of each logical CPU */ |
| 68 | cpumask_t cpu_core_map[NR_CPUS] __read_mostly; |
| 69 | EXPORT_SYMBOL(cpu_core_map); |
| 70 | |
Markos Chandras | cccf34e | 2015-07-10 09:29:10 +0100 | [diff] [blame] | 71 | /* |
| 72 | * A logcal cpu mask containing only one VPE per core to |
| 73 | * reduce the number of IPIs on large MT systems. |
| 74 | */ |
James Hogan | 640511a | 2016-07-13 14:12:52 +0100 | [diff] [blame] | 75 | cpumask_t cpu_foreign_map[NR_CPUS] __read_mostly; |
Markos Chandras | cccf34e | 2015-07-10 09:29:10 +0100 | [diff] [blame] | 76 | EXPORT_SYMBOL(cpu_foreign_map); |
| 77 | |
Ralf Baechle | 0ab7aef | 2007-03-02 20:42:04 +0000 | [diff] [blame] | 78 | /* representing cpus for which sibling maps can be computed */ |
| 79 | static cpumask_t cpu_sibling_setup_map; |
| 80 | |
Huacai Chen | bda4584 | 2014-06-26 11:41:26 +0800 | [diff] [blame] | 81 | /* representing cpus for which core maps can be computed */ |
| 82 | static cpumask_t cpu_core_setup_map; |
| 83 | |
Paul Burton | 76306f4 | 2014-02-14 16:30:52 +0000 | [diff] [blame] | 84 | cpumask_t cpu_coherent_mask; |
| 85 | |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 86 | #ifdef CONFIG_GENERIC_IRQ_IPI |
| 87 | static struct irq_desc *call_desc; |
| 88 | static struct irq_desc *sched_desc; |
| 89 | #endif |
| 90 | |
Ralf Baechle | 0ab7aef | 2007-03-02 20:42:04 +0000 | [diff] [blame] | 91 | static inline void set_cpu_sibling_map(int cpu) |
| 92 | { |
| 93 | int i; |
| 94 | |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 95 | cpumask_set_cpu(cpu, &cpu_sibling_setup_map); |
Ralf Baechle | 0ab7aef | 2007-03-02 20:42:04 +0000 | [diff] [blame] | 96 | |
| 97 | if (smp_num_siblings > 1) { |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 98 | for_each_cpu(i, &cpu_sibling_setup_map) { |
Huacai Chen | bda4584 | 2014-06-26 11:41:26 +0800 | [diff] [blame] | 99 | if (cpu_data[cpu].package == cpu_data[i].package && |
| 100 | cpu_data[cpu].core == cpu_data[i].core) { |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 101 | cpumask_set_cpu(i, &cpu_sibling_map[cpu]); |
| 102 | cpumask_set_cpu(cpu, &cpu_sibling_map[i]); |
Ralf Baechle | 0ab7aef | 2007-03-02 20:42:04 +0000 | [diff] [blame] | 103 | } |
| 104 | } |
| 105 | } else |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 106 | cpumask_set_cpu(cpu, &cpu_sibling_map[cpu]); |
Ralf Baechle | 0ab7aef | 2007-03-02 20:42:04 +0000 | [diff] [blame] | 107 | } |
| 108 | |
Huacai Chen | bda4584 | 2014-06-26 11:41:26 +0800 | [diff] [blame] | 109 | static inline void set_cpu_core_map(int cpu) |
| 110 | { |
| 111 | int i; |
| 112 | |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 113 | cpumask_set_cpu(cpu, &cpu_core_setup_map); |
Huacai Chen | bda4584 | 2014-06-26 11:41:26 +0800 | [diff] [blame] | 114 | |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 115 | for_each_cpu(i, &cpu_core_setup_map) { |
Huacai Chen | bda4584 | 2014-06-26 11:41:26 +0800 | [diff] [blame] | 116 | if (cpu_data[cpu].package == cpu_data[i].package) { |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 117 | cpumask_set_cpu(i, &cpu_core_map[cpu]); |
| 118 | cpumask_set_cpu(cpu, &cpu_core_map[i]); |
Huacai Chen | bda4584 | 2014-06-26 11:41:26 +0800 | [diff] [blame] | 119 | } |
| 120 | } |
| 121 | } |
| 122 | |
Markos Chandras | cccf34e | 2015-07-10 09:29:10 +0100 | [diff] [blame] | 123 | /* |
| 124 | * Calculate a new cpu_foreign_map mask whenever a |
| 125 | * new cpu appears or disappears. |
| 126 | */ |
James Hogan | 826e99b | 2016-07-13 14:12:45 +0100 | [diff] [blame] | 127 | void calculate_cpu_foreign_map(void) |
Markos Chandras | cccf34e | 2015-07-10 09:29:10 +0100 | [diff] [blame] | 128 | { |
| 129 | int i, k, core_present; |
| 130 | cpumask_t temp_foreign_map; |
| 131 | |
| 132 | /* Re-calculate the mask */ |
James Hogan | d825c06 | 2016-03-04 10:10:51 +0000 | [diff] [blame] | 133 | cpumask_clear(&temp_foreign_map); |
Markos Chandras | cccf34e | 2015-07-10 09:29:10 +0100 | [diff] [blame] | 134 | for_each_online_cpu(i) { |
| 135 | core_present = 0; |
| 136 | for_each_cpu(k, &temp_foreign_map) |
| 137 | if (cpu_data[i].package == cpu_data[k].package && |
| 138 | cpu_data[i].core == cpu_data[k].core) |
| 139 | core_present = 1; |
| 140 | if (!core_present) |
| 141 | cpumask_set_cpu(i, &temp_foreign_map); |
| 142 | } |
| 143 | |
James Hogan | 640511a | 2016-07-13 14:12:52 +0100 | [diff] [blame] | 144 | for_each_online_cpu(i) |
| 145 | cpumask_andnot(&cpu_foreign_map[i], |
| 146 | &temp_foreign_map, &cpu_sibling_map[i]); |
Markos Chandras | cccf34e | 2015-07-10 09:29:10 +0100 | [diff] [blame] | 147 | } |
| 148 | |
Ralf Baechle | 87353d8 | 2007-11-19 12:23:51 +0000 | [diff] [blame] | 149 | struct plat_smp_ops *mp_ops; |
Sanjay Lal | 82d45de | 2012-11-21 18:34:14 -0800 | [diff] [blame] | 150 | EXPORT_SYMBOL(mp_ops); |
Ralf Baechle | 87353d8 | 2007-11-19 12:23:51 +0000 | [diff] [blame] | 151 | |
Paul Gortmaker | 078a55f | 2013-06-18 13:38:59 +0000 | [diff] [blame] | 152 | void register_smp_ops(struct plat_smp_ops *ops) |
Ralf Baechle | 87353d8 | 2007-11-19 12:23:51 +0000 | [diff] [blame] | 153 | { |
Thiemo Seufer | 83738e3 | 2008-05-06 11:21:22 +0100 | [diff] [blame] | 154 | if (mp_ops) |
| 155 | printk(KERN_WARNING "Overriding previously set SMP ops\n"); |
Ralf Baechle | 87353d8 | 2007-11-19 12:23:51 +0000 | [diff] [blame] | 156 | |
| 157 | mp_ops = ops; |
| 158 | } |
| 159 | |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 160 | #ifdef CONFIG_GENERIC_IRQ_IPI |
| 161 | void mips_smp_send_ipi_single(int cpu, unsigned int action) |
| 162 | { |
| 163 | mips_smp_send_ipi_mask(cpumask_of(cpu), action); |
| 164 | } |
| 165 | |
| 166 | void mips_smp_send_ipi_mask(const struct cpumask *mask, unsigned int action) |
| 167 | { |
| 168 | unsigned long flags; |
| 169 | unsigned int core; |
| 170 | int cpu; |
| 171 | |
| 172 | local_irq_save(flags); |
| 173 | |
| 174 | switch (action) { |
| 175 | case SMP_CALL_FUNCTION: |
| 176 | __ipi_send_mask(call_desc, mask); |
| 177 | break; |
| 178 | |
| 179 | case SMP_RESCHEDULE_YOURSELF: |
| 180 | __ipi_send_mask(sched_desc, mask); |
| 181 | break; |
| 182 | |
| 183 | default: |
| 184 | BUG(); |
| 185 | } |
| 186 | |
| 187 | if (mips_cpc_present()) { |
| 188 | for_each_cpu(cpu, mask) { |
| 189 | core = cpu_data[cpu].core; |
| 190 | |
| 191 | if (core == current_cpu_data.core) |
| 192 | continue; |
| 193 | |
| 194 | while (!cpumask_test_cpu(cpu, &cpu_coherent_mask)) { |
Matt Redfearn | 4b64013 | 2016-09-07 10:45:19 +0100 | [diff] [blame] | 195 | mips_cm_lock_other(core, 0); |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 196 | mips_cpc_lock_other(core); |
| 197 | write_cpc_co_cmd(CPC_Cx_CMD_PWRUP); |
| 198 | mips_cpc_unlock_other(); |
Matt Redfearn | 4b64013 | 2016-09-07 10:45:19 +0100 | [diff] [blame] | 199 | mips_cm_unlock_other(); |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 200 | } |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | local_irq_restore(flags); |
| 205 | } |
| 206 | |
| 207 | |
| 208 | static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id) |
| 209 | { |
| 210 | scheduler_ipi(); |
| 211 | |
| 212 | return IRQ_HANDLED; |
| 213 | } |
| 214 | |
| 215 | static irqreturn_t ipi_call_interrupt(int irq, void *dev_id) |
| 216 | { |
| 217 | generic_smp_call_function_interrupt(); |
| 218 | |
| 219 | return IRQ_HANDLED; |
| 220 | } |
| 221 | |
| 222 | static struct irqaction irq_resched = { |
| 223 | .handler = ipi_resched_interrupt, |
| 224 | .flags = IRQF_PERCPU, |
| 225 | .name = "IPI resched" |
| 226 | }; |
| 227 | |
| 228 | static struct irqaction irq_call = { |
| 229 | .handler = ipi_call_interrupt, |
| 230 | .flags = IRQF_PERCPU, |
| 231 | .name = "IPI call" |
| 232 | }; |
| 233 | |
Matt Redfearn | 7688c53 | 2016-09-20 09:47:26 +0100 | [diff] [blame^] | 234 | static void smp_ipi_init_one(unsigned int virq, |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 235 | struct irqaction *action) |
| 236 | { |
| 237 | int ret; |
| 238 | |
| 239 | irq_set_handler(virq, handle_percpu_irq); |
| 240 | ret = setup_irq(virq, action); |
| 241 | BUG_ON(ret); |
| 242 | } |
| 243 | |
Matt Redfearn | 7688c53 | 2016-09-20 09:47:26 +0100 | [diff] [blame^] | 244 | static unsigned int call_virq, sched_virq; |
| 245 | |
| 246 | int mips_smp_ipi_allocate(const struct cpumask *mask) |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 247 | { |
Matt Redfearn | 7688c53 | 2016-09-20 09:47:26 +0100 | [diff] [blame^] | 248 | int virq; |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 249 | struct irq_domain *ipidomain; |
| 250 | struct device_node *node; |
| 251 | |
| 252 | node = of_irq_find_parent(of_root); |
| 253 | ipidomain = irq_find_matching_host(node, DOMAIN_BUS_IPI); |
| 254 | |
| 255 | /* |
| 256 | * Some platforms have half DT setup. So if we found irq node but |
| 257 | * didn't find an ipidomain, try to search for one that is not in the |
| 258 | * DT. |
| 259 | */ |
| 260 | if (node && !ipidomain) |
| 261 | ipidomain = irq_find_matching_host(NULL, DOMAIN_BUS_IPI); |
| 262 | |
Paul Burton | 578bffc | 2016-04-04 10:04:52 +0100 | [diff] [blame] | 263 | /* |
| 264 | * There are systems which only use IPI domains some of the time, |
| 265 | * depending upon configuration we don't know until runtime. An |
| 266 | * example is Malta where we may compile in support for GIC & the |
| 267 | * MT ASE, but run on a system which has multiple VPEs in a single |
| 268 | * core and doesn't include a GIC. Until all IPI implementations |
| 269 | * have been converted to use IPI domains the best we can do here |
| 270 | * is to return & hope some other code sets up the IPIs. |
| 271 | */ |
| 272 | if (!ipidomain) |
| 273 | return 0; |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 274 | |
Matt Redfearn | 7688c53 | 2016-09-20 09:47:26 +0100 | [diff] [blame^] | 275 | virq = irq_reserve_ipi(ipidomain, mask); |
| 276 | BUG_ON(!virq); |
| 277 | if (!call_virq) |
| 278 | call_virq = virq; |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 279 | |
Matt Redfearn | 7688c53 | 2016-09-20 09:47:26 +0100 | [diff] [blame^] | 280 | virq = irq_reserve_ipi(ipidomain, mask); |
| 281 | BUG_ON(!virq); |
| 282 | if (!sched_virq) |
| 283 | sched_virq = virq; |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 284 | |
| 285 | if (irq_domain_is_ipi_per_cpu(ipidomain)) { |
| 286 | int cpu; |
| 287 | |
Matt Redfearn | 7688c53 | 2016-09-20 09:47:26 +0100 | [diff] [blame^] | 288 | for_each_cpu(cpu, mask) { |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 289 | smp_ipi_init_one(call_virq + cpu, &irq_call); |
| 290 | smp_ipi_init_one(sched_virq + cpu, &irq_resched); |
| 291 | } |
| 292 | } else { |
| 293 | smp_ipi_init_one(call_virq, &irq_call); |
| 294 | smp_ipi_init_one(sched_virq, &irq_resched); |
| 295 | } |
| 296 | |
Matt Redfearn | 7688c53 | 2016-09-20 09:47:26 +0100 | [diff] [blame^] | 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | int mips_smp_ipi_free(const struct cpumask *mask) |
| 301 | { |
| 302 | struct irq_domain *ipidomain; |
| 303 | struct device_node *node; |
| 304 | |
| 305 | node = of_irq_find_parent(of_root); |
| 306 | ipidomain = irq_find_matching_host(node, DOMAIN_BUS_IPI); |
| 307 | |
| 308 | /* |
| 309 | * Some platforms have half DT setup. So if we found irq node but |
| 310 | * didn't find an ipidomain, try to search for one that is not in the |
| 311 | * DT. |
| 312 | */ |
| 313 | if (node && !ipidomain) |
| 314 | ipidomain = irq_find_matching_host(NULL, DOMAIN_BUS_IPI); |
| 315 | |
| 316 | BUG_ON(!ipidomain); |
| 317 | |
| 318 | if (irq_domain_is_ipi_per_cpu(ipidomain)) { |
| 319 | int cpu; |
| 320 | |
| 321 | for_each_cpu(cpu, mask) { |
| 322 | remove_irq(call_virq + cpu, &irq_call); |
| 323 | remove_irq(sched_virq + cpu, &irq_resched); |
| 324 | } |
| 325 | } |
| 326 | irq_destroy_ipi(call_virq, mask); |
| 327 | irq_destroy_ipi(sched_virq, mask); |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | |
| 332 | static int __init mips_smp_ipi_init(void) |
| 333 | { |
| 334 | mips_smp_ipi_allocate(cpu_possible_mask); |
| 335 | |
Qais Yousef | fbde2d7 | 2015-12-08 13:20:27 +0000 | [diff] [blame] | 336 | call_desc = irq_to_desc(call_virq); |
| 337 | sched_desc = irq_to_desc(sched_virq); |
| 338 | |
| 339 | return 0; |
| 340 | } |
| 341 | early_initcall(mips_smp_ipi_init); |
| 342 | #endif |
| 343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | /* |
| 345 | * First C code run on the secondary CPUs after being started up by |
| 346 | * the master. |
| 347 | */ |
Paul Gortmaker | 078a55f | 2013-06-18 13:38:59 +0000 | [diff] [blame] | 348 | asmlinkage void start_secondary(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | { |
Nick Piggin | 5bfb5d6 | 2005-11-08 21:39:01 -0800 | [diff] [blame] | 350 | unsigned int cpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
| 352 | cpu_probe(); |
David Daney | 6650df3 | 2012-05-15 00:04:50 -0700 | [diff] [blame] | 353 | per_cpu_trap_init(false); |
Ralf Baechle | 7bcf771 | 2007-10-11 23:46:09 +0100 | [diff] [blame] | 354 | mips_clockevent_init(); |
Ralf Baechle | 87353d8 | 2007-11-19 12:23:51 +0000 | [diff] [blame] | 355 | mp_ops->init_secondary(); |
Hemmo Nieminen | c7754e7 | 2015-01-15 23:01:59 +0200 | [diff] [blame] | 356 | cpu_report(); |
Paul Burton | e060f6e | 2015-09-25 08:59:38 -0700 | [diff] [blame] | 357 | maar_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
| 359 | /* |
| 360 | * XXX parity protection should be folded in here when it's converted |
| 361 | * to an option instead of something based on .cputype |
| 362 | */ |
| 363 | |
| 364 | calibrate_delay(); |
Nick Piggin | 5bfb5d6 | 2005-11-08 21:39:01 -0800 | [diff] [blame] | 365 | preempt_disable(); |
| 366 | cpu = smp_processor_id(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | cpu_data[cpu].udelay_val = loops_per_jiffy; |
| 368 | |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 369 | cpumask_set_cpu(cpu, &cpu_coherent_mask); |
Manfred Spraul | e545a61 | 2008-09-07 16:57:22 +0200 | [diff] [blame] | 370 | notify_cpu_starting(cpu); |
| 371 | |
Matt Redfearn | 8f46cca | 2016-09-22 17:15:47 +0100 | [diff] [blame] | 372 | cpumask_set_cpu(cpu, &cpu_callin_map); |
| 373 | synchronise_count_slave(cpu); |
| 374 | |
Yong Zhang | b9a09a0 | 2012-07-19 09:13:53 +0200 | [diff] [blame] | 375 | set_cpu_online(cpu, true); |
| 376 | |
Ralf Baechle | 0ab7aef | 2007-03-02 20:42:04 +0000 | [diff] [blame] | 377 | set_cpu_sibling_map(cpu); |
Huacai Chen | bda4584 | 2014-06-26 11:41:26 +0800 | [diff] [blame] | 378 | set_cpu_core_map(cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
Markos Chandras | cccf34e | 2015-07-10 09:29:10 +0100 | [diff] [blame] | 380 | calculate_cpu_foreign_map(); |
| 381 | |
Yong Zhang | b789ad6 | 2012-07-19 09:13:53 +0200 | [diff] [blame] | 382 | /* |
| 383 | * irq will be enabled in ->smp_finish(), enabling it too early |
| 384 | * is dangerous. |
| 385 | */ |
| 386 | WARN_ON_ONCE(!irqs_disabled()); |
Yong Zhang | 5309bda | 2012-07-19 09:13:53 +0200 | [diff] [blame] | 387 | mp_ops->smp_finish(); |
| 388 | |
Thomas Gleixner | fc6d73d | 2016-02-26 18:43:40 +0000 | [diff] [blame] | 389 | cpu_startup_entry(CPUHP_AP_ONLINE_IDLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | static void stop_this_cpu(void *dummy) |
| 393 | { |
| 394 | /* |
James Hogan | 9269631 | 2016-07-13 14:12:46 +0100 | [diff] [blame] | 395 | * Remove this CPU: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | */ |
Markos Chandras | cccf34e | 2015-07-10 09:29:10 +0100 | [diff] [blame] | 397 | |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 398 | set_cpu_online(smp_processor_id(), false); |
Markos Chandras | cccf34e | 2015-07-10 09:29:10 +0100 | [diff] [blame] | 399 | calculate_cpu_foreign_map(); |
Andrew Bresticker | ea925a7 | 2015-03-25 10:25:43 -0700 | [diff] [blame] | 400 | local_irq_disable(); |
| 401 | while (1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | void smp_send_stop(void) |
| 405 | { |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 406 | smp_call_function(stop_this_cpu, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
| 408 | |
| 409 | void __init smp_cpus_done(unsigned int max_cpus) |
| 410 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | /* called from main before smp_init() */ |
| 414 | void __init smp_prepare_cpus(unsigned int max_cpus) |
| 415 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | init_new_context(current, &init_mm); |
| 417 | current_thread_info()->cpu = 0; |
Ralf Baechle | 87353d8 | 2007-11-19 12:23:51 +0000 | [diff] [blame] | 418 | mp_ops->prepare_cpus(max_cpus); |
Ralf Baechle | 0ab7aef | 2007-03-02 20:42:04 +0000 | [diff] [blame] | 419 | set_cpu_sibling_map(0); |
Huacai Chen | bda4584 | 2014-06-26 11:41:26 +0800 | [diff] [blame] | 420 | set_cpu_core_map(0); |
Markos Chandras | cccf34e | 2015-07-10 09:29:10 +0100 | [diff] [blame] | 421 | calculate_cpu_foreign_map(); |
Ralf Baechle | 320e6ab | 2006-05-22 14:24:04 +0100 | [diff] [blame] | 422 | #ifndef CONFIG_HOTPLUG_CPU |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 423 | init_cpu_present(cpu_possible_mask); |
Ralf Baechle | 320e6ab | 2006-05-22 14:24:04 +0100 | [diff] [blame] | 424 | #endif |
Paul Burton | 76306f4 | 2014-02-14 16:30:52 +0000 | [diff] [blame] | 425 | cpumask_copy(&cpu_coherent_mask, cpu_possible_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | } |
| 427 | |
| 428 | /* preload SMP state for boot cpu */ |
Greg Kroah-Hartman | 28eb0e4 | 2012-12-21 14:04:39 -0800 | [diff] [blame] | 429 | void smp_prepare_boot_cpu(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | { |
Rusty Russell | 4037ac6 | 2009-09-24 09:34:47 -0600 | [diff] [blame] | 431 | set_cpu_possible(0, true); |
| 432 | set_cpu_online(0, true); |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 433 | cpumask_set_cpu(0, &cpu_callin_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | } |
| 435 | |
Paul Gortmaker | 078a55f | 2013-06-18 13:38:59 +0000 | [diff] [blame] | 436 | int __cpu_up(unsigned int cpu, struct task_struct *tidle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | { |
Thomas Gleixner | 360014a | 2012-04-20 13:05:51 +0000 | [diff] [blame] | 438 | mp_ops->boot_secondary(cpu, tidle); |
Ralf Baechle | b727a60 | 2005-02-22 21:18:01 +0000 | [diff] [blame] | 439 | |
| 440 | /* |
| 441 | * Trust is futile. We should really have timeouts ... |
| 442 | */ |
Ralf Baechle | cafb45b | 2015-05-12 06:43:04 +0200 | [diff] [blame] | 443 | while (!cpumask_test_cpu(cpu, &cpu_callin_map)) { |
Ralf Baechle | b727a60 | 2005-02-22 21:18:01 +0000 | [diff] [blame] | 444 | udelay(100); |
Ralf Baechle | cafb45b | 2015-05-12 06:43:04 +0200 | [diff] [blame] | 445 | schedule(); |
| 446 | } |
Ralf Baechle | b727a60 | 2005-02-22 21:18:01 +0000 | [diff] [blame] | 447 | |
Jayachandran C | cf9bfe5 | 2012-08-14 18:56:13 +0530 | [diff] [blame] | 448 | synchronise_count_master(cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | return 0; |
| 450 | } |
| 451 | |
| 452 | /* Not really SMP stuff ... */ |
| 453 | int setup_profiling_timer(unsigned int multiplier) |
| 454 | { |
| 455 | return 0; |
| 456 | } |
| 457 | |
| 458 | static void flush_tlb_all_ipi(void *info) |
| 459 | { |
| 460 | local_flush_tlb_all(); |
| 461 | } |
| 462 | |
| 463 | void flush_tlb_all(void) |
| 464 | { |
Jens Axboe | 15c8b6c | 2008-05-09 09:39:44 +0200 | [diff] [blame] | 465 | on_each_cpu(flush_tlb_all_ipi, NULL, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | static void flush_tlb_mm_ipi(void *mm) |
| 469 | { |
| 470 | local_flush_tlb_mm((struct mm_struct *)mm); |
| 471 | } |
| 472 | |
| 473 | /* |
Ralf Baechle | 2596935 | 2006-06-22 22:42:32 +0100 | [diff] [blame] | 474 | * Special Variant of smp_call_function for use by TLB functions: |
| 475 | * |
| 476 | * o No return value |
| 477 | * o collapses to normal function call on UP kernels |
| 478 | * o collapses to normal function call on systems with a single shared |
| 479 | * primary cache. |
Ralf Baechle | 2596935 | 2006-06-22 22:42:32 +0100 | [diff] [blame] | 480 | */ |
| 481 | static inline void smp_on_other_tlbs(void (*func) (void *info), void *info) |
| 482 | { |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 483 | smp_call_function(func, info, 1); |
Ralf Baechle | 2596935 | 2006-06-22 22:42:32 +0100 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | static inline void smp_on_each_tlb(void (*func) (void *info), void *info) |
| 487 | { |
| 488 | preempt_disable(); |
| 489 | |
| 490 | smp_on_other_tlbs(func, info); |
| 491 | func(info); |
| 492 | |
| 493 | preempt_enable(); |
| 494 | } |
| 495 | |
| 496 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | * The following tlb flush calls are invoked when old translations are |
| 498 | * being torn down, or pte attributes are changing. For single threaded |
| 499 | * address spaces, a new context is obtained on the current cpu, and tlb |
| 500 | * context on other cpus are invalidated to force a new context allocation |
| 501 | * at switch_mm time, should the mm ever be used on other cpus. For |
| 502 | * multithreaded address spaces, intercpu interrupts have to be sent. |
| 503 | * Another case where intercpu interrupts are required is when the target |
| 504 | * mm might be active on another cpu (eg debuggers doing the flushes on |
| 505 | * behalf of debugees, kswapd stealing pages from another process etc). |
| 506 | * Kanoj 07/00. |
| 507 | */ |
| 508 | |
| 509 | void flush_tlb_mm(struct mm_struct *mm) |
| 510 | { |
| 511 | preempt_disable(); |
| 512 | |
| 513 | if ((atomic_read(&mm->mm_users) != 1) || (current->mm != mm)) { |
Ralf Baechle | c50cade | 2007-10-04 16:57:08 +0100 | [diff] [blame] | 514 | smp_on_other_tlbs(flush_tlb_mm_ipi, mm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | } else { |
Ralf Baechle | b5eb551 | 2007-10-03 19:16:57 +0100 | [diff] [blame] | 516 | unsigned int cpu; |
| 517 | |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 518 | for_each_online_cpu(cpu) { |
| 519 | if (cpu != smp_processor_id() && cpu_context(cpu, mm)) |
Ralf Baechle | b5eb551 | 2007-10-03 19:16:57 +0100 | [diff] [blame] | 520 | cpu_context(cpu, mm) = 0; |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 521 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | } |
| 523 | local_flush_tlb_mm(mm); |
| 524 | |
| 525 | preempt_enable(); |
| 526 | } |
| 527 | |
| 528 | struct flush_tlb_data { |
| 529 | struct vm_area_struct *vma; |
| 530 | unsigned long addr1; |
| 531 | unsigned long addr2; |
| 532 | }; |
| 533 | |
| 534 | static void flush_tlb_range_ipi(void *info) |
| 535 | { |
Ralf Baechle | c50cade | 2007-10-04 16:57:08 +0100 | [diff] [blame] | 536 | struct flush_tlb_data *fd = info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
| 538 | local_flush_tlb_range(fd->vma, fd->addr1, fd->addr2); |
| 539 | } |
| 540 | |
| 541 | void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) |
| 542 | { |
| 543 | struct mm_struct *mm = vma->vm_mm; |
| 544 | |
| 545 | preempt_disable(); |
| 546 | if ((atomic_read(&mm->mm_users) != 1) || (current->mm != mm)) { |
Ralf Baechle | 89a8a5a | 2007-10-04 18:18:52 +0100 | [diff] [blame] | 547 | struct flush_tlb_data fd = { |
| 548 | .vma = vma, |
| 549 | .addr1 = start, |
| 550 | .addr2 = end, |
| 551 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
Ralf Baechle | c50cade | 2007-10-04 16:57:08 +0100 | [diff] [blame] | 553 | smp_on_other_tlbs(flush_tlb_range_ipi, &fd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } else { |
Ralf Baechle | b5eb551 | 2007-10-03 19:16:57 +0100 | [diff] [blame] | 555 | unsigned int cpu; |
James Hogan | a05c392 | 2016-07-13 14:12:44 +0100 | [diff] [blame] | 556 | int exec = vma->vm_flags & VM_EXEC; |
Ralf Baechle | b5eb551 | 2007-10-03 19:16:57 +0100 | [diff] [blame] | 557 | |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 558 | for_each_online_cpu(cpu) { |
James Hogan | a05c392 | 2016-07-13 14:12:44 +0100 | [diff] [blame] | 559 | /* |
| 560 | * flush_cache_range() will only fully flush icache if |
| 561 | * the VMA is executable, otherwise we must invalidate |
| 562 | * ASID without it appearing to has_valid_asid() as if |
| 563 | * mm has been completely unused by that CPU. |
| 564 | */ |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 565 | if (cpu != smp_processor_id() && cpu_context(cpu, mm)) |
James Hogan | a05c392 | 2016-07-13 14:12:44 +0100 | [diff] [blame] | 566 | cpu_context(cpu, mm) = !exec; |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 567 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | } |
| 569 | local_flush_tlb_range(vma, start, end); |
| 570 | preempt_enable(); |
| 571 | } |
| 572 | |
| 573 | static void flush_tlb_kernel_range_ipi(void *info) |
| 574 | { |
Ralf Baechle | c50cade | 2007-10-04 16:57:08 +0100 | [diff] [blame] | 575 | struct flush_tlb_data *fd = info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
| 577 | local_flush_tlb_kernel_range(fd->addr1, fd->addr2); |
| 578 | } |
| 579 | |
| 580 | void flush_tlb_kernel_range(unsigned long start, unsigned long end) |
| 581 | { |
Ralf Baechle | 89a8a5a | 2007-10-04 18:18:52 +0100 | [diff] [blame] | 582 | struct flush_tlb_data fd = { |
| 583 | .addr1 = start, |
| 584 | .addr2 = end, |
| 585 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | |
Jens Axboe | 15c8b6c | 2008-05-09 09:39:44 +0200 | [diff] [blame] | 587 | on_each_cpu(flush_tlb_kernel_range_ipi, &fd, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | } |
| 589 | |
| 590 | static void flush_tlb_page_ipi(void *info) |
| 591 | { |
Ralf Baechle | c50cade | 2007-10-04 16:57:08 +0100 | [diff] [blame] | 592 | struct flush_tlb_data *fd = info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
| 594 | local_flush_tlb_page(fd->vma, fd->addr1); |
| 595 | } |
| 596 | |
| 597 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long page) |
| 598 | { |
| 599 | preempt_disable(); |
| 600 | if ((atomic_read(&vma->vm_mm->mm_users) != 1) || (current->mm != vma->vm_mm)) { |
Ralf Baechle | 89a8a5a | 2007-10-04 18:18:52 +0100 | [diff] [blame] | 601 | struct flush_tlb_data fd = { |
| 602 | .vma = vma, |
| 603 | .addr1 = page, |
| 604 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
Ralf Baechle | c50cade | 2007-10-04 16:57:08 +0100 | [diff] [blame] | 606 | smp_on_other_tlbs(flush_tlb_page_ipi, &fd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } else { |
Ralf Baechle | b5eb551 | 2007-10-03 19:16:57 +0100 | [diff] [blame] | 608 | unsigned int cpu; |
| 609 | |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 610 | for_each_online_cpu(cpu) { |
James Hogan | a05c392 | 2016-07-13 14:12:44 +0100 | [diff] [blame] | 611 | /* |
| 612 | * flush_cache_page() only does partial flushes, so |
| 613 | * invalidate ASID without it appearing to |
| 614 | * has_valid_asid() as if mm has been completely unused |
| 615 | * by that CPU. |
| 616 | */ |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 617 | if (cpu != smp_processor_id() && cpu_context(cpu, vma->vm_mm)) |
James Hogan | a05c392 | 2016-07-13 14:12:44 +0100 | [diff] [blame] | 618 | cpu_context(cpu, vma->vm_mm) = 1; |
Rusty Russell | 0b5f9c0 | 2012-03-29 15:38:30 +1030 | [diff] [blame] | 619 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | } |
| 621 | local_flush_tlb_page(vma, page); |
| 622 | preempt_enable(); |
| 623 | } |
| 624 | |
| 625 | static void flush_tlb_one_ipi(void *info) |
| 626 | { |
| 627 | unsigned long vaddr = (unsigned long) info; |
| 628 | |
| 629 | local_flush_tlb_one(vaddr); |
| 630 | } |
| 631 | |
| 632 | void flush_tlb_one(unsigned long vaddr) |
| 633 | { |
Ralf Baechle | 2596935 | 2006-06-22 22:42:32 +0100 | [diff] [blame] | 634 | smp_on_each_tlb(flush_tlb_one_ipi, (void *) vaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | } |
| 636 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | EXPORT_SYMBOL(flush_tlb_page); |
| 638 | EXPORT_SYMBOL(flush_tlb_one); |
Ralf Baechle | 7aa1c8f | 2012-10-11 18:14:58 +0200 | [diff] [blame] | 639 | |
| 640 | #if defined(CONFIG_KEXEC) |
| 641 | void (*dump_ipi_function_ptr)(void *) = NULL; |
| 642 | void dump_send_ipi(void (*dump_ipi_callback)(void *)) |
| 643 | { |
| 644 | int i; |
| 645 | int cpu = smp_processor_id(); |
| 646 | |
| 647 | dump_ipi_function_ptr = dump_ipi_callback; |
| 648 | smp_mb(); |
| 649 | for_each_online_cpu(i) |
| 650 | if (i != cpu) |
| 651 | mp_ops->send_ipi_single(i, SMP_DUMP); |
| 652 | |
| 653 | } |
| 654 | EXPORT_SYMBOL(dump_send_ipi); |
| 655 | #endif |
Paul Burton | cc7964a | 2014-02-14 09:24:58 +0000 | [diff] [blame] | 656 | |
| 657 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
| 658 | |
| 659 | static DEFINE_PER_CPU(atomic_t, tick_broadcast_count); |
| 660 | static DEFINE_PER_CPU(struct call_single_data, tick_broadcast_csd); |
| 661 | |
| 662 | void tick_broadcast(const struct cpumask *mask) |
| 663 | { |
| 664 | atomic_t *count; |
| 665 | struct call_single_data *csd; |
| 666 | int cpu; |
| 667 | |
| 668 | for_each_cpu(cpu, mask) { |
| 669 | count = &per_cpu(tick_broadcast_count, cpu); |
| 670 | csd = &per_cpu(tick_broadcast_csd, cpu); |
| 671 | |
| 672 | if (atomic_inc_return(count) == 1) |
| 673 | smp_call_function_single_async(cpu, csd); |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | static void tick_broadcast_callee(void *info) |
| 678 | { |
| 679 | int cpu = smp_processor_id(); |
| 680 | tick_receive_broadcast(); |
| 681 | atomic_set(&per_cpu(tick_broadcast_count, cpu), 0); |
| 682 | } |
| 683 | |
| 684 | static int __init tick_broadcast_init(void) |
| 685 | { |
| 686 | struct call_single_data *csd; |
| 687 | int cpu; |
| 688 | |
| 689 | for (cpu = 0; cpu < NR_CPUS; cpu++) { |
| 690 | csd = &per_cpu(tick_broadcast_csd, cpu); |
| 691 | csd->func = tick_broadcast_callee; |
| 692 | } |
| 693 | |
| 694 | return 0; |
| 695 | } |
| 696 | early_initcall(tick_broadcast_init); |
| 697 | |
| 698 | #endif /* CONFIG_GENERIC_CLOCKEVENTS_BROADCAST */ |