qom/cpu.c

   1 /*
   2  * QEMU CPU model
   3  *
   4  * Copyright (c) 2012-2014 SUSE LINUX Products GmbH
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see
  18  * <http://www.gnu.org/licenses/gpl-2.0.html>
  19  */
  20
  21 #include "qemu-common.h"
  22 #include "qom/cpu.h"
  23 #include "sysemu/kvm.h"
  24 #include "qemu/notify.h"
  25 #include "qemu/log.h"
  26 #include "qemu/error-report.h"
  27 #include "sysemu/sysemu.h"
  28
  29 bool cpu_exists(int64_t id)
  30 {
  31     CPUState *cpu;
  32
  33     CPU_FOREACH(cpu) {
  34         CPUClass *cc = CPU_GET_CLASS(cpu);
  35
  36         if (cc->get_arch_id(cpu) == id) {
  37             return true;
  38         }
  39     }
  40     return false;
  41 }
  42
  43 CPUState *cpu_generic_init(const char *typename, const char *cpu_model)
  44 {
  45     char *str, *name, *featurestr;
  46     CPUState *cpu;
  47     ObjectClass *oc;
  48     CPUClass *cc;
  49     Error *err = NULL;
  50
  51     str = g_strdup(cpu_model);
  52     name = strtok(str, ",");
  53
  54     oc = cpu_class_by_name(typename, name);
  55     if (oc == NULL) {
  56         g_free(str);
  57         return NULL;
  58     }
  59
  60     cpu = CPU(object_new(object_class_get_name(oc)));
  61     cc = CPU_GET_CLASS(cpu);
  62
  63     featurestr = strtok(NULL, ",");
  64     cc->parse_features(cpu, featurestr, &err);
  65     g_free(str);
  66     if (err != NULL) {
  67         goto out;
  68     }
  69
  70     object_property_set_bool(OBJECT(cpu), true, "realized", &err);
  71
  72 out:
  73     if (err != NULL) {
  74         error_report("%s", error_get_pretty(err));
  75         error_free(err);
  76         object_unref(OBJECT(cpu));
  77         return NULL;
  78     }
  79
  80     return cpu;
  81 }
  82
  83 bool cpu_paging_enabled(const CPUState *cpu)
  84 {
  85     CPUClass *cc = CPU_GET_CLASS(cpu);
  86
  87     return cc->get_paging_enabled(cpu);
  88 }
  89
  90 static bool cpu_common_get_paging_enabled(const CPUState *cpu)
  91 {
  92     return false;
  93 }
  94
  95 void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list,
  96                             Error **errp)
  97 {
  98     CPUClass *cc = CPU_GET_CLASS(cpu);
  99
 100     return cc->get_memory_mapping(cpu, list, errp);
 101 }
 102
 103 static void cpu_common_get_memory_mapping(CPUState *cpu,
 104                                           MemoryMappingList *list,
 105                                           Error **errp)
 106 {
 107     error_setg(errp, "Obtaining memory mappings is unsupported on this CPU.");
 108 }
 109
 110 void cpu_reset_interrupt(CPUState *cpu, int mask)
 111 {
 112     cpu->interrupt_request &= ~mask;
 113 }
 114
 115 void cpu_exit(CPUState *cpu)
 116 {
 117     cpu->exit_request = 1;
 118     cpu->tcg_exit_req = 1;
 119 }
 120
 121 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 122                              void *opaque)
 123 {
 124     CPUClass *cc = CPU_GET_CLASS(cpu);
 125
 126     return (*cc->write_elf32_qemunote)(f, cpu, opaque);
 127 }
 128
 129 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
 130                                            CPUState *cpu, void *opaque)
 131 {
 132     return -1;
 133 }
 134
 135 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
 136                          int cpuid, void *opaque)
 137 {
 138     CPUClass *cc = CPU_GET_CLASS(cpu);
 139
 140     return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
 141 }
 142
 143 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
 144                                        CPUState *cpu, int cpuid,
 145                                        void *opaque)
 146 {
 147     return -1;
 148 }
 149
 150 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 151                              void *opaque)
 152 {
 153     CPUClass *cc = CPU_GET_CLASS(cpu);
 154
 155     return (*cc->write_elf64_qemunote)(f, cpu, opaque);
 156 }
 157
 158 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
 159                                            CPUState *cpu, void *opaque)
 160 {
 161     return -1;
 162 }
 163
 164 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 165                          int cpuid, void *opaque)
 166 {
 167     CPUClass *cc = CPU_GET_CLASS(cpu);
 168
 169     return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
 170 }
 171
 172 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
 173                                        CPUState *cpu, int cpuid,
 174                                        void *opaque)
 175 {
 176     return -1;
 177 }
 178
 179
 180 static int cpu_common_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg)
 181 {
 182     return 0;
 183 }
 184
 185 static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg)
 186 {
 187     return 0;
 188 }
 189
 190 bool target_words_bigendian(void);
 191 static bool cpu_common_virtio_is_big_endian(CPUState *cpu)
 192 {
 193     return target_words_bigendian();
 194 }
 195
 196 static void cpu_common_noop(CPUState *cpu)
 197 {
 198 }
 199
 200 static bool cpu_common_exec_interrupt(CPUState *cpu, int int_req)
 201 {
 202     return false;
 203 }
 204
 205 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 206                     int flags)
 207 {
 208     CPUClass *cc = CPU_GET_CLASS(cpu);
 209
 210     if (cc->dump_state) {
 211         cpu_synchronize_state(cpu);
 212         cc->dump_state(cpu, f, cpu_fprintf, flags);
 213     }
 214 }
 215
 216 void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 217                          int flags)
 218 {
 219     CPUClass *cc = CPU_GET_CLASS(cpu);
 220
 221     if (cc->dump_statistics) {
 222         cc->dump_statistics(cpu, f, cpu_fprintf, flags);
 223     }
 224 }
 225
 226 void cpu_reset(CPUState *cpu)
 227 {
 228     CPUClass *klass = CPU_GET_CLASS(cpu);
 229
 230     if (klass->reset != NULL) {
 231         (*klass->reset)(cpu);
 232     }
 233 }
 234
 235 static void cpu_common_reset(CPUState *cpu)
 236 {
 237     CPUClass *cc = CPU_GET_CLASS(cpu);
 238
 239     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
 240         qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
 241         log_cpu_state(cpu, cc->reset_dump_flags);
 242     }
 243
 244     cpu->interrupt_request = 0;
 245     cpu->current_tb = NULL;
 246     cpu->halted = 0;
 247     cpu->mem_io_pc = 0;
 248     cpu->mem_io_vaddr = 0;
 249     cpu->icount_extra = 0;
 250     cpu->icount_decr.u32 = 0;
 251     cpu->can_do_io = 0;
 252     memset(cpu->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof(void *));
 253 }
 254
 255 static bool cpu_common_has_work(CPUState *cs)
 256 {
 257     return false;
 258 }
 259
 260 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 261 {
 262     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
 263
 264     return cc->class_by_name(cpu_model);
 265 }
 266
 267 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 268 {
 269     return NULL;
 270 }
 271
 272 static void cpu_common_parse_features(CPUState *cpu, char *features,
 273                                       Error **errp)
 274 {
 275     char *featurestr; /* Single "key=value" string being parsed */
 276     char *val;
 277     Error *err = NULL;
 278
 279     featurestr = features ? strtok(features, ",") : NULL;
 280
 281     while (featurestr) {
 282         val = strchr(featurestr, '=');
 283         if (val) {
 284             *val = 0;
 285             val++;
 286             object_property_parse(OBJECT(cpu), val, featurestr, &err);
 287             if (err) {
 288                 error_propagate(errp, err);
 289                 return;
 290             }
 291         } else {
 292             error_setg(errp, "Expected key=value format, found %s.",
 293                        featurestr);
 294             return;
 295         }
 296         featurestr = strtok(NULL, ",");
 297     }
 298 }
 299
 300 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 301 {
 302     CPUState *cpu = CPU(dev);
 303
 304     if (dev->hotplugged) {
 305         cpu_synchronize_post_init(cpu);
 306         cpu_resume(cpu);
 307     }
 308 }
 309
 310 static void cpu_common_initfn(Object *obj)
 311 {
 312     CPUState *cpu = CPU(obj);
 313     CPUClass *cc = CPU_GET_CLASS(obj);
 314
 315     cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs;
 316 }
 317
 318 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 319 {
 320     return cpu->cpu_index;
 321 }
 322
 323 static void cpu_class_init(ObjectClass *klass, void *data)
 324 {
 325     DeviceClass *dc = DEVICE_CLASS(klass);
 326     CPUClass *k = CPU_CLASS(klass);
 327
 328     k->class_by_name = cpu_common_class_by_name;
 329     k->parse_features = cpu_common_parse_features;
 330     k->reset = cpu_common_reset;
 331     k->get_arch_id = cpu_common_get_arch_id;
 332     k->has_work = cpu_common_has_work;
 333     k->get_paging_enabled = cpu_common_get_paging_enabled;
 334     k->get_memory_mapping = cpu_common_get_memory_mapping;
 335     k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
 336     k->write_elf32_note = cpu_common_write_elf32_note;
 337     k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
 338     k->write_elf64_note = cpu_common_write_elf64_note;
 339     k->gdb_read_register = cpu_common_gdb_read_register;
 340     k->gdb_write_register = cpu_common_gdb_write_register;
 341     k->virtio_is_big_endian = cpu_common_virtio_is_big_endian;
 342     k->debug_excp_handler = cpu_common_noop;
 343     k->cpu_exec_enter = cpu_common_noop;
 344     k->cpu_exec_exit = cpu_common_noop;
 345     k->cpu_exec_interrupt = cpu_common_exec_interrupt;
 346     dc->realize = cpu_common_realizefn;
 347     /*
 348      * Reason: CPUs still need special care by board code: wiring up
 349      * IRQs, adding reset handlers, halting non-first CPUs, ...
 350      */
 351     dc->cannot_instantiate_with_device_add_yet = true;
 352 }
 353
 354 static const TypeInfo cpu_type_info = {
 355     .name = TYPE_CPU,
 356     .parent = TYPE_DEVICE,
 357     .instance_size = sizeof(CPUState),
 358     .instance_init = cpu_common_initfn,
 359     .abstract = true,
 360     .class_size = sizeof(CPUClass),
 361     .class_init = cpu_class_init,
 362 };
 363
 364 static void cpu_register_types(void)
 365 {
 366     type_register_static(&cpu_type_info);
 367 }
 368
 369 type_init(cpu_register_types)