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 "exec/log.h"
  27 #include "qemu/error-report.h"
  28 #include "sysemu/sysemu.h"
  29
  30 bool cpu_exists(int64_t id)
  31 {
  32     CPUState *cpu;
  33
  34     CPU_FOREACH(cpu) {
  35         CPUClass *cc = CPU_GET_CLASS(cpu);
  36
  37         if (cc->get_arch_id(cpu) == id) {
  38             return true;
  39         }
  40     }
  41     return false;
  42 }
  43
  44 CPUState *cpu_generic_init(const char *typename, const char *cpu_model)
  45 {
  46     char *str, *name, *featurestr;
  47     CPUState *cpu;
  48     ObjectClass *oc;
  49     CPUClass *cc;
  50     Error *err = NULL;
  51
  52     str = g_strdup(cpu_model);
  53     name = strtok(str, ",");
  54
  55     oc = cpu_class_by_name(typename, name);
  56     if (oc == NULL) {
  57         g_free(str);
  58         return NULL;
  59     }
  60
  61     cpu = CPU(object_new(object_class_get_name(oc)));
  62     cc = CPU_GET_CLASS(cpu);
  63
  64     featurestr = strtok(NULL, ",");
  65     cc->parse_features(cpu, featurestr, &err);
  66     g_free(str);
  67     if (err != NULL) {
  68         goto out;
  69     }
  70
  71     object_property_set_bool(OBJECT(cpu), true, "realized", &err);
  72
  73 out:
  74     if (err != NULL) {
  75         error_report_err(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     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     /* Ensure cpu_exec will see the exit request after TCG has exited.  */
 119     smp_wmb();
 120     cpu->tcg_exit_req = 1;
 121 }
 122
 123 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 124                              void *opaque)
 125 {
 126     CPUClass *cc = CPU_GET_CLASS(cpu);
 127
 128     return (*cc->write_elf32_qemunote)(f, cpu, opaque);
 129 }
 130
 131 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
 132                                            CPUState *cpu, void *opaque)
 133 {
 134     return 0;
 135 }
 136
 137 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
 138                          int cpuid, void *opaque)
 139 {
 140     CPUClass *cc = CPU_GET_CLASS(cpu);
 141
 142     return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
 143 }
 144
 145 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
 146                                        CPUState *cpu, int cpuid,
 147                                        void *opaque)
 148 {
 149     return -1;
 150 }
 151
 152 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 153                              void *opaque)
 154 {
 155     CPUClass *cc = CPU_GET_CLASS(cpu);
 156
 157     return (*cc->write_elf64_qemunote)(f, cpu, opaque);
 158 }
 159
 160 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
 161                                            CPUState *cpu, void *opaque)
 162 {
 163     return 0;
 164 }
 165
 166 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 167                          int cpuid, void *opaque)
 168 {
 169     CPUClass *cc = CPU_GET_CLASS(cpu);
 170
 171     return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
 172 }
 173
 174 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
 175                                        CPUState *cpu, int cpuid,
 176                                        void *opaque)
 177 {
 178     return -1;
 179 }
 180
 181
 182 static int cpu_common_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg)
 183 {
 184     return 0;
 185 }
 186
 187 static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg)
 188 {
 189     return 0;
 190 }
 191
 192 bool target_words_bigendian(void);
 193 static bool cpu_common_virtio_is_big_endian(CPUState *cpu)
 194 {
 195     return target_words_bigendian();
 196 }
 197
 198 static void cpu_common_noop(CPUState *cpu)
 199 {
 200 }
 201
 202 static bool cpu_common_exec_interrupt(CPUState *cpu, int int_req)
 203 {
 204     return false;
 205 }
 206
 207 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 208                     int flags)
 209 {
 210     CPUClass *cc = CPU_GET_CLASS(cpu);
 211
 212     if (cc->dump_state) {
 213         cpu_synchronize_state(cpu);
 214         cc->dump_state(cpu, f, cpu_fprintf, flags);
 215     }
 216 }
 217
 218 void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 219                          int flags)
 220 {
 221     CPUClass *cc = CPU_GET_CLASS(cpu);
 222
 223     if (cc->dump_statistics) {
 224         cc->dump_statistics(cpu, f, cpu_fprintf, flags);
 225     }
 226 }
 227
 228 void cpu_reset(CPUState *cpu)
 229 {
 230     CPUClass *klass = CPU_GET_CLASS(cpu);
 231
 232     if (klass->reset != NULL) {
 233         (*klass->reset)(cpu);
 234     }
 235 }
 236
 237 static void cpu_common_reset(CPUState *cpu)
 238 {
 239     CPUClass *cc = CPU_GET_CLASS(cpu);
 240
 241     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
 242         qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
 243         log_cpu_state(cpu, cc->reset_dump_flags);
 244     }
 245
 246     cpu->interrupt_request = 0;
 247     cpu->current_tb = NULL;
 248     cpu->halted = 0;
 249     cpu->mem_io_pc = 0;
 250     cpu->mem_io_vaddr = 0;
 251     cpu->icount_extra = 0;
 252     cpu->icount_decr.u32 = 0;
 253     cpu->can_do_io = 1;
 254     cpu->exception_index = -1;
 255     cpu->crash_occurred = false;
 256     memset(cpu->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof(void *));
 257 }
 258
 259 static bool cpu_common_has_work(CPUState *cs)
 260 {
 261     return false;
 262 }
 263
 264 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 265 {
 266     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
 267
 268     return cc->class_by_name(cpu_model);
 269 }
 270
 271 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 272 {
 273     return NULL;
 274 }
 275
 276 static void cpu_common_parse_features(CPUState *cpu, char *features,
 277                                       Error **errp)
 278 {
 279     char *featurestr; /* Single "key=value" string being parsed */
 280     char *val;
 281     Error *err = NULL;
 282
 283     featurestr = features ? strtok(features, ",") : NULL;
 284
 285     while (featurestr) {
 286         val = strchr(featurestr, '=');
 287         if (val) {
 288             *val = 0;
 289             val++;
 290             object_property_parse(OBJECT(cpu), val, featurestr, &err);
 291             if (err) {
 292                 error_propagate(errp, err);
 293                 return;
 294             }
 295         } else {
 296             error_setg(errp, "Expected key=value format, found %s.",
 297                        featurestr);
 298             return;
 299         }
 300         featurestr = strtok(NULL, ",");
 301     }
 302 }
 303
 304 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 305 {
 306     CPUState *cpu = CPU(dev);
 307
 308     if (dev->hotplugged) {
 309         cpu_synchronize_post_init(cpu);
 310         cpu_resume(cpu);
 311     }
 312 }
 313
 314 static void cpu_common_initfn(Object *obj)
 315 {
 316     CPUState *cpu = CPU(obj);
 317     CPUClass *cc = CPU_GET_CLASS(obj);
 318
 319     cpu->cpu_index = -1;
 320     cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs;
 321     qemu_mutex_init(&cpu->work_mutex);
 322     QTAILQ_INIT(&cpu->breakpoints);
 323     QTAILQ_INIT(&cpu->watchpoints);
 324 }
 325
 326 static void cpu_common_finalize(Object *obj)
 327 {
 328     cpu_exec_exit(CPU(obj));
 329 }
 330
 331 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 332 {
 333     return cpu->cpu_index;
 334 }
 335
 336 static void cpu_class_init(ObjectClass *klass, void *data)
 337 {
 338     DeviceClass *dc = DEVICE_CLASS(klass);
 339     CPUClass *k = CPU_CLASS(klass);
 340
 341     k->class_by_name = cpu_common_class_by_name;
 342     k->parse_features = cpu_common_parse_features;
 343     k->reset = cpu_common_reset;
 344     k->get_arch_id = cpu_common_get_arch_id;
 345     k->has_work = cpu_common_has_work;
 346     k->get_paging_enabled = cpu_common_get_paging_enabled;
 347     k->get_memory_mapping = cpu_common_get_memory_mapping;
 348     k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
 349     k->write_elf32_note = cpu_common_write_elf32_note;
 350     k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
 351     k->write_elf64_note = cpu_common_write_elf64_note;
 352     k->gdb_read_register = cpu_common_gdb_read_register;
 353     k->gdb_write_register = cpu_common_gdb_write_register;
 354     k->virtio_is_big_endian = cpu_common_virtio_is_big_endian;
 355     k->debug_excp_handler = cpu_common_noop;
 356     k->cpu_exec_enter = cpu_common_noop;
 357     k->cpu_exec_exit = cpu_common_noop;
 358     k->cpu_exec_interrupt = cpu_common_exec_interrupt;
 359     dc->realize = cpu_common_realizefn;
 360     /*
 361      * Reason: CPUs still need special care by board code: wiring up
 362      * IRQs, adding reset handlers, halting non-first CPUs, ...
 363      */
 364     dc->cannot_instantiate_with_device_add_yet = true;
 365 }
 366
 367 static const TypeInfo cpu_type_info = {
 368     .name = TYPE_CPU,
 369     .parent = TYPE_DEVICE,
 370     .instance_size = sizeof(CPUState),
 371     .instance_init = cpu_common_initfn,
 372     .instance_finalize = cpu_common_finalize,
 373     .abstract = true,
 374     .class_size = sizeof(CPUClass),
 375     .class_init = cpu_class_init,
 376 };
 377
 378 static void cpu_register_types(void)
 379 {
 380     type_register_static(&cpu_type_info);
 381 }
 382
 383 type_init(cpu_register_types)