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