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 /* CPU hot-plug notifiers */
 111 static NotifierList cpu_added_notifiers =
 112     NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
 113
 114 void qemu_register_cpu_added_notifier(Notifier *notifier)
 115 {
 116     notifier_list_add(&cpu_added_notifiers, notifier);
 117 }
 118
 119 void cpu_reset_interrupt(CPUState *cpu, int mask)
 120 {
 121     cpu->interrupt_request &= ~mask;
 122 }
 123
 124 void cpu_exit(CPUState *cpu)
 125 {
 126     cpu->exit_request = 1;
 127     cpu->tcg_exit_req = 1;
 128 }
 129
 130 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 131                              void *opaque)
 132 {
 133     CPUClass *cc = CPU_GET_CLASS(cpu);
 134
 135     return (*cc->write_elf32_qemunote)(f, cpu, opaque);
 136 }
 137
 138 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
 139                                            CPUState *cpu, void *opaque)
 140 {
 141     return -1;
 142 }
 143
 144 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
 145                          int cpuid, void *opaque)
 146 {
 147     CPUClass *cc = CPU_GET_CLASS(cpu);
 148
 149     return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
 150 }
 151
 152 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
 153                                        CPUState *cpu, int cpuid,
 154                                        void *opaque)
 155 {
 156     return -1;
 157 }
 158
 159 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 160                              void *opaque)
 161 {
 162     CPUClass *cc = CPU_GET_CLASS(cpu);
 163
 164     return (*cc->write_elf64_qemunote)(f, cpu, opaque);
 165 }
 166
 167 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
 168                                            CPUState *cpu, void *opaque)
 169 {
 170     return -1;
 171 }
 172
 173 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 174                          int cpuid, void *opaque)
 175 {
 176     CPUClass *cc = CPU_GET_CLASS(cpu);
 177
 178     return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
 179 }
 180
 181 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
 182                                        CPUState *cpu, int cpuid,
 183                                        void *opaque)
 184 {
 185     return -1;
 186 }
 187
 188
 189 static int cpu_common_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg)
 190 {
 191     return 0;
 192 }
 193
 194 static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg)
 195 {
 196     return 0;
 197 }
 198
 199 bool target_words_bigendian(void);
 200 static bool cpu_common_virtio_is_big_endian(CPUState *cpu)
 201 {
 202     return target_words_bigendian();
 203 }
 204
 205 static void cpu_common_noop(CPUState *cpu)
 206 {
 207 }
 208
 209 static bool cpu_common_exec_interrupt(CPUState *cpu, int int_req)
 210 {
 211     return false;
 212 }
 213
 214 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 215                     int flags)
 216 {
 217     CPUClass *cc = CPU_GET_CLASS(cpu);
 218
 219     if (cc->dump_state) {
 220         cpu_synchronize_state(cpu);
 221         cc->dump_state(cpu, f, cpu_fprintf, flags);
 222     }
 223 }
 224
 225 void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 226                          int flags)
 227 {
 228     CPUClass *cc = CPU_GET_CLASS(cpu);
 229
 230     if (cc->dump_statistics) {
 231         cc->dump_statistics(cpu, f, cpu_fprintf, flags);
 232     }
 233 }
 234
 235 void cpu_reset(CPUState *cpu)
 236 {
 237     CPUClass *klass = CPU_GET_CLASS(cpu);
 238
 239     if (klass->reset != NULL) {
 240         (*klass->reset)(cpu);
 241     }
 242 }
 243
 244 static void cpu_common_reset(CPUState *cpu)
 245 {
 246     CPUClass *cc = CPU_GET_CLASS(cpu);
 247
 248     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
 249         qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
 250         log_cpu_state(cpu, cc->reset_dump_flags);
 251     }
 252
 253     cpu->interrupt_request = 0;
 254     cpu->current_tb = NULL;
 255     cpu->halted = 0;
 256     cpu->mem_io_pc = 0;
 257     cpu->mem_io_vaddr = 0;
 258     cpu->icount_extra = 0;
 259     cpu->icount_decr.u32 = 0;
 260     cpu->can_do_io = 0;
 261     memset(cpu->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof(void *));
 262 }
 263
 264 static bool cpu_common_has_work(CPUState *cs)
 265 {
 266     return false;
 267 }
 268
 269 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 270 {
 271     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
 272
 273     return cc->class_by_name(cpu_model);
 274 }
 275
 276 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 277 {
 278     return NULL;
 279 }
 280
 281 static void cpu_common_parse_features(CPUState *cpu, char *features,
 282                                       Error **errp)
 283 {
 284     char *featurestr; /* Single "key=value" string being parsed */
 285     char *val;
 286     Error *err = NULL;
 287
 288     featurestr = features ? strtok(features, ",") : NULL;
 289
 290     while (featurestr) {
 291         val = strchr(featurestr, '=');
 292         if (val) {
 293             *val = 0;
 294             val++;
 295             object_property_parse(OBJECT(cpu), val, featurestr, &err);
 296             if (err) {
 297                 error_propagate(errp, err);
 298                 return;
 299             }
 300         } else {
 301             error_setg(errp, "Expected key=value format, found %s.",
 302                        featurestr);
 303             return;
 304         }
 305         featurestr = strtok(NULL, ",");
 306     }
 307 }
 308
 309 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 310 {
 311     CPUState *cpu = CPU(dev);
 312
 313     if (dev->hotplugged) {
 314         cpu_synchronize_post_init(cpu);
 315         notifier_list_notify(&cpu_added_notifiers, dev);
 316         cpu_resume(cpu);
 317     }
 318 }
 319
 320 static void cpu_common_initfn(Object *obj)
 321 {
 322     CPUState *cpu = CPU(obj);
 323     CPUClass *cc = CPU_GET_CLASS(obj);
 324
 325     cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs;
 326 }
 327
 328 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 329 {
 330     return cpu->cpu_index;
 331 }
 332
 333 static void cpu_class_init(ObjectClass *klass, void *data)
 334 {
 335     DeviceClass *dc = DEVICE_CLASS(klass);
 336     CPUClass *k = CPU_CLASS(klass);
 337
 338     k->class_by_name = cpu_common_class_by_name;
 339     k->parse_features = cpu_common_parse_features;
 340     k->reset = cpu_common_reset;
 341     k->get_arch_id = cpu_common_get_arch_id;
 342     k->has_work = cpu_common_has_work;
 343     k->get_paging_enabled = cpu_common_get_paging_enabled;
 344     k->get_memory_mapping = cpu_common_get_memory_mapping;
 345     k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
 346     k->write_elf32_note = cpu_common_write_elf32_note;
 347     k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
 348     k->write_elf64_note = cpu_common_write_elf64_note;
 349     k->gdb_read_register = cpu_common_gdb_read_register;
 350     k->gdb_write_register = cpu_common_gdb_write_register;
 351     k->virtio_is_big_endian = cpu_common_virtio_is_big_endian;
 352     k->debug_excp_handler = cpu_common_noop;
 353     k->cpu_exec_enter = cpu_common_noop;
 354     k->cpu_exec_exit = cpu_common_noop;
 355     k->cpu_exec_interrupt = cpu_common_exec_interrupt;
 356     dc->realize = cpu_common_realizefn;
 357     /*
 358      * Reason: CPUs still need special care by board code: wiring up
 359      * IRQs, adding reset handlers, halting non-first CPUs, ...
 360      */
 361     dc->cannot_instantiate_with_device_add_yet = true;
 362 }
 363
 364 static const TypeInfo cpu_type_info = {
 365     .name = TYPE_CPU,
 366     .parent = TYPE_DEVICE,
 367     .instance_size = sizeof(CPUState),
 368     .instance_init = cpu_common_initfn,
 369     .abstract = true,
 370     .class_size = sizeof(CPUClass),
 371     .class_init = cpu_class_init,
 372 };
 373
 374 static void cpu_register_types(void)
 375 {
 376     type_register_static(&cpu_type_info);
 377 }
 378
 379 type_init(cpu_register_types)