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 static bool cpu_common_debug_check_watchpoint(CPUState *cpu, CPUWatchpoint *wp)
 193 {
 194     /* If no extra check is required, QEMU watchpoint match can be considered
 195      * as an architectural match.
 196      */
 197     return true;
 198 }
 199
 200 bool target_words_bigendian(void);
 201 static bool cpu_common_virtio_is_big_endian(CPUState *cpu)
 202 {
 203     return target_words_bigendian();
 204 }
 205
 206 static void cpu_common_noop(CPUState *cpu)
 207 {
 208 }
 209
 210 static bool cpu_common_exec_interrupt(CPUState *cpu, int int_req)
 211 {
 212     return false;
 213 }
 214
 215 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 216                     int flags)
 217 {
 218     CPUClass *cc = CPU_GET_CLASS(cpu);
 219
 220     if (cc->dump_state) {
 221         cpu_synchronize_state(cpu);
 222         cc->dump_state(cpu, f, cpu_fprintf, flags);
 223     }
 224 }
 225
 226 void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 227                          int flags)
 228 {
 229     CPUClass *cc = CPU_GET_CLASS(cpu);
 230
 231     if (cc->dump_statistics) {
 232         cc->dump_statistics(cpu, f, cpu_fprintf, flags);
 233     }
 234 }
 235
 236 void cpu_reset(CPUState *cpu)
 237 {
 238     CPUClass *klass = CPU_GET_CLASS(cpu);
 239
 240     if (klass->reset != NULL) {
 241         (*klass->reset)(cpu);
 242     }
 243 }
 244
 245 static void cpu_common_reset(CPUState *cpu)
 246 {
 247     CPUClass *cc = CPU_GET_CLASS(cpu);
 248
 249     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
 250         qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
 251         log_cpu_state(cpu, cc->reset_dump_flags);
 252     }
 253
 254     cpu->interrupt_request = 0;
 255     cpu->current_tb = NULL;
 256     cpu->halted = 0;
 257     cpu->mem_io_pc = 0;
 258     cpu->mem_io_vaddr = 0;
 259     cpu->icount_extra = 0;
 260     cpu->icount_decr.u32 = 0;
 261     cpu->can_do_io = 1;
 262     cpu->exception_index = -1;
 263     cpu->crash_occurred = false;
 264     memset(cpu->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof(void *));
 265 }
 266
 267 static bool cpu_common_has_work(CPUState *cs)
 268 {
 269     return false;
 270 }
 271
 272 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 273 {
 274     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
 275
 276     return cc->class_by_name(cpu_model);
 277 }
 278
 279 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 280 {
 281     return NULL;
 282 }
 283
 284 static void cpu_common_parse_features(CPUState *cpu, char *features,
 285                                       Error **errp)
 286 {
 287     char *featurestr; /* Single "key=value" string being parsed */
 288     char *val;
 289     Error *err = NULL;
 290
 291     featurestr = features ? strtok(features, ",") : NULL;
 292
 293     while (featurestr) {
 294         val = strchr(featurestr, '=');
 295         if (val) {
 296             *val = 0;
 297             val++;
 298             object_property_parse(OBJECT(cpu), val, featurestr, &err);
 299             if (err) {
 300                 error_propagate(errp, err);
 301                 return;
 302             }
 303         } else {
 304             error_setg(errp, "Expected key=value format, found %s.",
 305                        featurestr);
 306             return;
 307         }
 308         featurestr = strtok(NULL, ",");
 309     }
 310 }
 311
 312 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 313 {
 314     CPUState *cpu = CPU(dev);
 315
 316     if (dev->hotplugged) {
 317         cpu_synchronize_post_init(cpu);
 318         cpu_resume(cpu);
 319     }
 320 }
 321
 322 static void cpu_common_initfn(Object *obj)
 323 {
 324     CPUState *cpu = CPU(obj);
 325     CPUClass *cc = CPU_GET_CLASS(obj);
 326
 327     cpu->cpu_index = -1;
 328     cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs;
 329     qemu_mutex_init(&cpu->work_mutex);
 330     QTAILQ_INIT(&cpu->breakpoints);
 331     QTAILQ_INIT(&cpu->watchpoints);
 332 }
 333
 334 static void cpu_common_finalize(Object *obj)
 335 {
 336     cpu_exec_exit(CPU(obj));
 337 }
 338
 339 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 340 {
 341     return cpu->cpu_index;
 342 }
 343
 344 static void cpu_class_init(ObjectClass *klass, void *data)
 345 {
 346     DeviceClass *dc = DEVICE_CLASS(klass);
 347     CPUClass *k = CPU_CLASS(klass);
 348
 349     k->class_by_name = cpu_common_class_by_name;
 350     k->parse_features = cpu_common_parse_features;
 351     k->reset = cpu_common_reset;
 352     k->get_arch_id = cpu_common_get_arch_id;
 353     k->has_work = cpu_common_has_work;
 354     k->get_paging_enabled = cpu_common_get_paging_enabled;
 355     k->get_memory_mapping = cpu_common_get_memory_mapping;
 356     k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
 357     k->write_elf32_note = cpu_common_write_elf32_note;
 358     k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
 359     k->write_elf64_note = cpu_common_write_elf64_note;
 360     k->gdb_read_register = cpu_common_gdb_read_register;
 361     k->gdb_write_register = cpu_common_gdb_write_register;
 362     k->virtio_is_big_endian = cpu_common_virtio_is_big_endian;
 363     k->debug_excp_handler = cpu_common_noop;
 364     k->debug_check_watchpoint = cpu_common_debug_check_watchpoint;
 365     k->cpu_exec_enter = cpu_common_noop;
 366     k->cpu_exec_exit = cpu_common_noop;
 367     k->cpu_exec_interrupt = cpu_common_exec_interrupt;
 368     dc->realize = cpu_common_realizefn;
 369     /*
 370      * Reason: CPUs still need special care by board code: wiring up
 371      * IRQs, adding reset handlers, halting non-first CPUs, ...
 372      */
 373     dc->cannot_instantiate_with_device_add_yet = true;
 374 }
 375
 376 static const TypeInfo cpu_type_info = {
 377     .name = TYPE_CPU,
 378     .parent = TYPE_DEVICE,
 379     .instance_size = sizeof(CPUState),
 380     .instance_init = cpu_common_initfn,
 381     .instance_finalize = cpu_common_finalize,
 382     .abstract = true,
 383     .class_size = sizeof(CPUClass),
 384     .class_init = cpu_class_init,
 385 };
 386
 387 static void cpu_register_types(void)
 388 {
 389     type_register_static(&cpu_type_info);
 390 }
 391
 392 type_init(cpu_register_types)