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_err(err);
  75         object_unref(OBJECT(cpu));
  76         return NULL;
  77     }
  78
  79     return cpu;
  80 }
  81
  82 bool cpu_paging_enabled(const CPUState *cpu)
  83 {
  84     CPUClass *cc = CPU_GET_CLASS(cpu);
  85
  86     return cc->get_paging_enabled(cpu);
  87 }
  88
  89 static bool cpu_common_get_paging_enabled(const CPUState *cpu)
  90 {
  91     return false;
  92 }
  93
  94 void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list,
  95                             Error **errp)
  96 {
  97     CPUClass *cc = CPU_GET_CLASS(cpu);
  98
  99     cc->get_memory_mapping(cpu, list, errp);
 100 }
 101
 102 static void cpu_common_get_memory_mapping(CPUState *cpu,
 103                                           MemoryMappingList *list,
 104                                           Error **errp)
 105 {
 106     error_setg(errp, "Obtaining memory mappings is unsupported on this CPU.");
 107 }
 108
 109 void cpu_reset_interrupt(CPUState *cpu, int mask)
 110 {
 111     cpu->interrupt_request &= ~mask;
 112 }
 113
 114 void cpu_exit(CPUState *cpu)
 115 {
 116     cpu->exit_request = 1;
 117     cpu->tcg_exit_req = 1;
 118 }
 119
 120 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 121                              void *opaque)
 122 {
 123     CPUClass *cc = CPU_GET_CLASS(cpu);
 124
 125     return (*cc->write_elf32_qemunote)(f, cpu, opaque);
 126 }
 127
 128 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
 129                                            CPUState *cpu, void *opaque)
 130 {
 131     return -1;
 132 }
 133
 134 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
 135                          int cpuid, void *opaque)
 136 {
 137     CPUClass *cc = CPU_GET_CLASS(cpu);
 138
 139     return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
 140 }
 141
 142 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
 143                                        CPUState *cpu, int cpuid,
 144                                        void *opaque)
 145 {
 146     return -1;
 147 }
 148
 149 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 150                              void *opaque)
 151 {
 152     CPUClass *cc = CPU_GET_CLASS(cpu);
 153
 154     return (*cc->write_elf64_qemunote)(f, cpu, opaque);
 155 }
 156
 157 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
 158                                            CPUState *cpu, void *opaque)
 159 {
 160     return -1;
 161 }
 162
 163 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 164                          int cpuid, void *opaque)
 165 {
 166     CPUClass *cc = CPU_GET_CLASS(cpu);
 167
 168     return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
 169 }
 170
 171 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
 172                                        CPUState *cpu, int cpuid,
 173                                        void *opaque)
 174 {
 175     return -1;
 176 }
 177
 178
 179 static int cpu_common_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg)
 180 {
 181     return 0;
 182 }
 183
 184 static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg)
 185 {
 186     return 0;
 187 }
 188
 189 bool target_words_bigendian(void);
 190 static bool cpu_common_virtio_is_big_endian(CPUState *cpu)
 191 {
 192     return target_words_bigendian();
 193 }
 194
 195 static void cpu_common_noop(CPUState *cpu)
 196 {
 197 }
 198
 199 static bool cpu_common_exec_interrupt(CPUState *cpu, int int_req)
 200 {
 201     return false;
 202 }
 203
 204 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 205                     int flags)
 206 {
 207     CPUClass *cc = CPU_GET_CLASS(cpu);
 208
 209     if (cc->dump_state) {
 210         cpu_synchronize_state(cpu);
 211         cc->dump_state(cpu, f, cpu_fprintf, flags);
 212     }
 213 }
 214
 215 void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 216                          int flags)
 217 {
 218     CPUClass *cc = CPU_GET_CLASS(cpu);
 219
 220     if (cc->dump_statistics) {
 221         cc->dump_statistics(cpu, f, cpu_fprintf, flags);
 222     }
 223 }
 224
 225 void cpu_reset(CPUState *cpu)
 226 {
 227     CPUClass *klass = CPU_GET_CLASS(cpu);
 228
 229     if (klass->reset != NULL) {
 230         (*klass->reset)(cpu);
 231     }
 232 }
 233
 234 static void cpu_common_reset(CPUState *cpu)
 235 {
 236     CPUClass *cc = CPU_GET_CLASS(cpu);
 237
 238     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
 239         qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
 240         log_cpu_state(cpu, cc->reset_dump_flags);
 241     }
 242
 243     cpu->interrupt_request = 0;
 244     cpu->current_tb = NULL;
 245     cpu->halted = 0;
 246     cpu->mem_io_pc = 0;
 247     cpu->mem_io_vaddr = 0;
 248     cpu->icount_extra = 0;
 249     cpu->icount_decr.u32 = 0;
 250     cpu->can_do_io = 0;
 251     cpu->exception_index = -1;
 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)