include/qom/cpu.h

   1 /*
   2  * QEMU CPU model
   3  *
   4  * Copyright (c) 2012 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 #ifndef QEMU_CPU_H
  21 #define QEMU_CPU_H
  22
  23 #include <signal.h>
  24 #include "hw/qdev-core.h"
  25 #include "exec/hwaddr.h"
  26 #include "qemu/thread.h"
  27 #include "qemu/tls.h"
  28 #include "qemu/typedefs.h"
  29
  30 typedef int (*WriteCoreDumpFunction)(void *buf, size_t size, void *opaque);
  31
  32 /**
  33  * vaddr:
  34  * Type wide enough to contain any #target_ulong virtual address.
  35  */
  36 typedef uint64_t vaddr;
  37 #define VADDR_PRId PRId64
  38 #define VADDR_PRIu PRIu64
  39 #define VADDR_PRIo PRIo64
  40 #define VADDR_PRIx PRIx64
  41 #define VADDR_PRIX PRIX64
  42 #define VADDR_MAX UINT64_MAX
  43
  44 /**
  45  * SECTION:cpu
  46  * @section_id: QEMU-cpu
  47  * @title: CPU Class
  48  * @short_description: Base class for all CPUs
  49  */
  50
  51 #define TYPE_CPU "cpu"
  52
  53 #define CPU(obj) OBJECT_CHECK(CPUState, (obj), TYPE_CPU)
  54 #define CPU_CLASS(class) OBJECT_CLASS_CHECK(CPUClass, (class), TYPE_CPU)
  55 #define CPU_GET_CLASS(obj) OBJECT_GET_CLASS(CPUClass, (obj), TYPE_CPU)
  56
  57 typedef struct CPUState CPUState;
  58
  59 typedef void (*CPUUnassignedAccess)(CPUState *cpu, hwaddr addr,
  60                                     bool is_write, bool is_exec, int opaque,
  61                                     unsigned size);
  62
  63 struct TranslationBlock;
  64
  65 /**
  66  * CPUClass:
  67  * @class_by_name: Callback to map -cpu command line model name to an
  68  * instantiatable CPU type.
  69  * @reset: Callback to reset the #CPUState to its initial state.
  70  * @reset_dump_flags: #CPUDumpFlags to use for reset logging.
  71  * @do_interrupt: Callback for interrupt handling.
  72  * @do_unassigned_access: Callback for unassigned access handling.
  73  * @dump_state: Callback for dumping state.
  74  * @dump_statistics: Callback for dumping statistics.
  75  * @get_arch_id: Callback for getting architecture-dependent CPU ID.
  76  * @get_paging_enabled: Callback for inquiring whether paging is enabled.
  77  * @get_memory_mapping: Callback for obtaining the memory mappings.
  78  * @set_pc: Callback for setting the Program Counter register.
  79  * @synchronize_from_tb: Callback for synchronizing state from a TCG
  80  * #TranslationBlock.
  81  * @vmsd: State description for migration.
  82  *
  83  * Represents a CPU family or model.
  84  */
  85 typedef struct CPUClass {
  86     /*< private >*/
  87     DeviceClass parent_class;
  88     /*< public >*/
  89
  90     ObjectClass *(*class_by_name)(const char *cpu_model);
  91
  92     void (*reset)(CPUState *cpu);
  93     int reset_dump_flags;
  94     void (*do_interrupt)(CPUState *cpu);
  95     CPUUnassignedAccess do_unassigned_access;
  96     void (*dump_state)(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
  97                        int flags);
  98     void (*dump_statistics)(CPUState *cpu, FILE *f,
  99                             fprintf_function cpu_fprintf, int flags);
 100     int64_t (*get_arch_id)(CPUState *cpu);
 101     bool (*get_paging_enabled)(const CPUState *cpu);
 102     void (*get_memory_mapping)(CPUState *cpu, MemoryMappingList *list,
 103                                Error **errp);
 104     void (*set_pc)(CPUState *cpu, vaddr value);
 105     void (*synchronize_from_tb)(CPUState *cpu, struct TranslationBlock *tb);
 106
 107     const struct VMStateDescription *vmsd;
 108     int (*write_elf64_note)(WriteCoreDumpFunction f, CPUState *cpu,
 109                             int cpuid, void *opaque);
 110     int (*write_elf64_qemunote)(WriteCoreDumpFunction f, CPUState *cpu,
 111                                 void *opaque);
 112     int (*write_elf32_note)(WriteCoreDumpFunction f, CPUState *cpu,
 113                             int cpuid, void *opaque);
 114     int (*write_elf32_qemunote)(WriteCoreDumpFunction f, CPUState *cpu,
 115                                 void *opaque);
 116 } CPUClass;
 117
 118 struct KVMState;
 119 struct kvm_run;
 120
 121 /**
 122  * CPUState:
 123  * @cpu_index: CPU index (informative).
 124  * @nr_cores: Number of cores within this CPU package.
 125  * @nr_threads: Number of threads within this CPU.
 126  * @numa_node: NUMA node this CPU is belonging to.
 127  * @host_tid: Host thread ID.
 128  * @running: #true if CPU is currently running (usermode).
 129  * @created: Indicates whether the CPU thread has been successfully created.
 130  * @interrupt_request: Indicates a pending interrupt request.
 131  * @halted: Nonzero if the CPU is in suspended state.
 132  * @stop: Indicates a pending stop request.
 133  * @stopped: Indicates the CPU has been artificially stopped.
 134  * @tcg_exit_req: Set to force TCG to stop executing linked TBs for this
 135  *           CPU and return to its top level loop.
 136  * @singlestep_enabled: Flags for single-stepping.
 137  * @env_ptr: Pointer to subclass-specific CPUArchState field.
 138  * @current_tb: Currently executing TB.
 139  * @next_cpu: Next CPU sharing TB cache.
 140  * @kvm_fd: vCPU file descriptor for KVM.
 141  *
 142  * State of one CPU core or thread.
 143  */
 144 struct CPUState {
 145     /*< private >*/
 146     DeviceState parent_obj;
 147     /*< public >*/
 148
 149     int nr_cores;
 150     int nr_threads;
 151     int numa_node;
 152
 153     struct QemuThread *thread;
 154 #ifdef _WIN32
 155     HANDLE hThread;
 156 #endif
 157     int thread_id;
 158     uint32_t host_tid;
 159     bool running;
 160     struct QemuCond *halt_cond;
 161     struct qemu_work_item *queued_work_first, *queued_work_last;
 162     bool thread_kicked;
 163     bool created;
 164     bool stop;
 165     bool stopped;
 166     volatile sig_atomic_t exit_request;
 167     volatile sig_atomic_t tcg_exit_req;
 168     uint32_t interrupt_request;
 169     int singlestep_enabled;
 170
 171     void *env_ptr; /* CPUArchState */
 172     struct TranslationBlock *current_tb;
 173     CPUState *next_cpu;
 174
 175     int kvm_fd;
 176     bool kvm_vcpu_dirty;
 177     struct KVMState *kvm_state;
 178     struct kvm_run *kvm_run;
 179
 180     /* TODO Move common fields from CPUArchState here. */
 181     int cpu_index; /* used by alpha TCG */
 182     uint32_t halted; /* used by alpha, cris, ppc TCG */
 183 };
 184
 185 extern CPUState *first_cpu;
 186
 187 DECLARE_TLS(CPUState *, current_cpu);
 188 #define current_cpu tls_var(current_cpu)
 189
 190 /**
 191  * cpu_paging_enabled:
 192  * @cpu: The CPU whose state is to be inspected.
 193  *
 194  * Returns: %true if paging is enabled, %false otherwise.
 195  */
 196 bool cpu_paging_enabled(const CPUState *cpu);
 197
 198 /**
 199  * cpu_get_memory_mapping:
 200  * @cpu: The CPU whose memory mappings are to be obtained.
 201  * @list: Where to write the memory mappings to.
 202  * @errp: Pointer for reporting an #Error.
 203  */
 204 void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list,
 205                             Error **errp);
 206
 207 /**
 208  * cpu_write_elf64_note:
 209  * @f: pointer to a function that writes memory to a file
 210  * @cpu: The CPU whose memory is to be dumped
 211  * @cpuid: ID number of the CPU
 212  * @opaque: pointer to the CPUState struct
 213  */
 214 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 215                          int cpuid, void *opaque);
 216
 217 /**
 218  * cpu_write_elf64_qemunote:
 219  * @f: pointer to a function that writes memory to a file
 220  * @cpu: The CPU whose memory is to be dumped
 221  * @cpuid: ID number of the CPU
 222  * @opaque: pointer to the CPUState struct
 223  */
 224 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 225                              void *opaque);
 226
 227 /**
 228  * cpu_write_elf32_note:
 229  * @f: pointer to a function that writes memory to a file
 230  * @cpu: The CPU whose memory is to be dumped
 231  * @cpuid: ID number of the CPU
 232  * @opaque: pointer to the CPUState struct
 233  */
 234 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
 235                          int cpuid, void *opaque);
 236
 237 /**
 238  * cpu_write_elf32_qemunote:
 239  * @f: pointer to a function that writes memory to a file
 240  * @cpu: The CPU whose memory is to be dumped
 241  * @cpuid: ID number of the CPU
 242  * @opaque: pointer to the CPUState struct
 243  */
 244 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 245                              void *opaque);
 246
 247 /**
 248  * CPUDumpFlags:
 249  * @CPU_DUMP_CODE:
 250  * @CPU_DUMP_FPU: dump FPU register state, not just integer
 251  * @CPU_DUMP_CCOP: dump info about TCG QEMU's condition code optimization state
 252  */
 253 enum CPUDumpFlags {
 254     CPU_DUMP_CODE = 0x00010000,
 255     CPU_DUMP_FPU  = 0x00020000,
 256     CPU_DUMP_CCOP = 0x00040000,
 257 };
 258
 259 /**
 260  * cpu_dump_state:
 261  * @cpu: The CPU whose state is to be dumped.
 262  * @f: File to dump to.
 263  * @cpu_fprintf: Function to dump with.
 264  * @flags: Flags what to dump.
 265  *
 266  * Dumps CPU state.
 267  */
 268 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 269                     int flags);
 270
 271 /**
 272  * cpu_dump_statistics:
 273  * @cpu: The CPU whose state is to be dumped.
 274  * @f: File to dump to.
 275  * @cpu_fprintf: Function to dump with.
 276  * @flags: Flags what to dump.
 277  *
 278  * Dumps CPU statistics.
 279  */
 280 void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 281                          int flags);
 282
 283 /**
 284  * cpu_reset:
 285  * @cpu: The CPU whose state is to be reset.
 286  */
 287 void cpu_reset(CPUState *cpu);
 288
 289 /**
 290  * cpu_class_by_name:
 291  * @typename: The CPU base type.
 292  * @cpu_model: The model string without any parameters.
 293  *
 294  * Looks up a CPU #ObjectClass matching name @cpu_model.
 295  *
 296  * Returns: A #CPUClass or %NULL if not matching class is found.
 297  */
 298 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model);
 299
 300 /**
 301  * cpu_class_set_vmsd:
 302  * @cc: CPU class
 303  * @value: Value to set. Unused for %CONFIG_USER_ONLY.
 304  *
 305  * Sets #VMStateDescription for @cc.
 306  *
 307  * The @value argument is intentionally discarded for the non-softmmu targets
 308  * to avoid linker errors or excessive preprocessor usage. If this behavior
 309  * is undesired, you should assign #CPUClass.vmsd directly instead.
 310  */
 311 #ifndef CONFIG_USER_ONLY
 312 static inline void cpu_class_set_vmsd(CPUClass *cc,
 313                                       const struct VMStateDescription *value)
 314 {
 315     cc->vmsd = value;
 316 }
 317 #else
 318 #define cpu_class_set_vmsd(cc, value) ((cc)->vmsd = NULL)
 319 #endif
 320
 321 #ifndef CONFIG_USER_ONLY
 322 static inline void cpu_class_set_do_unassigned_access(CPUClass *cc,
 323                                                       CPUUnassignedAccess value)
 324 {
 325     cc->do_unassigned_access = value;
 326 }
 327 #else
 328 #define cpu_class_set_do_unassigned_access(cc, value) \
 329     ((cc)->do_unassigned_access = NULL)
 330 #endif
 331
 332 /**
 333  * device_class_set_vmsd:
 334  * @dc: Device class
 335  * @value: Value to set. Unused for %CONFIG_USER_ONLY.
 336  *
 337  * Sets #VMStateDescription for @dc.
 338  *
 339  * The @value argument is intentionally discarded for the non-softmmu targets
 340  * to avoid linker errors or excessive preprocessor usage. If this behavior
 341  * is undesired, you should assign #DeviceClass.vmsd directly instead.
 342  */
 343 #ifndef CONFIG_USER_ONLY
 344 static inline void device_class_set_vmsd(DeviceClass *dc,
 345                                          const struct VMStateDescription *value)
 346 {
 347     dc->vmsd = value;
 348 }
 349 #else
 350 #define device_class_set_vmsd(dc, value) ((dc)->vmsd = NULL)
 351 #endif
 352
 353 /**
 354  * qemu_cpu_has_work:
 355  * @cpu: The vCPU to check.
 356  *
 357  * Checks whether the CPU has work to do.
 358  *
 359  * Returns: %true if the CPU has work, %false otherwise.
 360  */
 361 bool qemu_cpu_has_work(CPUState *cpu);
 362
 363 /**
 364  * qemu_cpu_is_self:
 365  * @cpu: The vCPU to check against.
 366  *
 367  * Checks whether the caller is executing on the vCPU thread.
 368  *
 369  * Returns: %true if called from @cpu's thread, %false otherwise.
 370  */
 371 bool qemu_cpu_is_self(CPUState *cpu);
 372
 373 /**
 374  * qemu_cpu_kick:
 375  * @cpu: The vCPU to kick.
 376  *
 377  * Kicks @cpu's thread.
 378  */
 379 void qemu_cpu_kick(CPUState *cpu);
 380
 381 /**
 382  * cpu_is_stopped:
 383  * @cpu: The CPU to check.
 384  *
 385  * Checks whether the CPU is stopped.
 386  *
 387  * Returns: %true if run state is not running or if artificially stopped;
 388  * %false otherwise.
 389  */
 390 bool cpu_is_stopped(CPUState *cpu);
 391
 392 /**
 393  * run_on_cpu:
 394  * @cpu: The vCPU to run on.
 395  * @func: The function to be executed.
 396  * @data: Data to pass to the function.
 397  *
 398  * Schedules the function @func for execution on the vCPU @cpu.
 399  */
 400 void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
 401
 402 /**
 403  * async_run_on_cpu:
 404  * @cpu: The vCPU to run on.
 405  * @func: The function to be executed.
 406  * @data: Data to pass to the function.
 407  *
 408  * Schedules the function @func for execution on the vCPU @cpu asynchronously.
 409  */
 410 void async_run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
 411
 412 /**
 413  * qemu_for_each_cpu:
 414  * @func: The function to be executed.
 415  * @data: Data to pass to the function.
 416  *
 417  * Executes @func for each CPU.
 418  */
 419 void qemu_for_each_cpu(void (*func)(CPUState *cpu, void *data), void *data);
 420
 421 /**
 422  * qemu_get_cpu:
 423  * @index: The CPUState@cpu_index value of the CPU to obtain.
 424  *
 425  * Gets a CPU matching @index.
 426  *
 427  * Returns: The CPU or %NULL if there is no matching CPU.
 428  */
 429 CPUState *qemu_get_cpu(int index);
 430
 431 /**
 432  * cpu_exists:
 433  * @id: Guest-exposed CPU ID to lookup.
 434  *
 435  * Search for CPU with specified ID.
 436  *
 437  * Returns: %true - CPU is found, %false - CPU isn't found.
 438  */
 439 bool cpu_exists(int64_t id);
 440
 441 #ifndef CONFIG_USER_ONLY
 442
 443 typedef void (*CPUInterruptHandler)(CPUState *, int);
 444
 445 extern CPUInterruptHandler cpu_interrupt_handler;
 446
 447 /**
 448  * cpu_interrupt:
 449  * @cpu: The CPU to set an interrupt on.
 450  * @mask: The interupts to set.
 451  *
 452  * Invokes the interrupt handler.
 453  */
 454 static inline void cpu_interrupt(CPUState *cpu, int mask)
 455 {
 456     cpu_interrupt_handler(cpu, mask);
 457 }
 458
 459 #else /* USER_ONLY */
 460
 461 void cpu_interrupt(CPUState *cpu, int mask);
 462
 463 #endif /* USER_ONLY */
 464
 465 #ifndef CONFIG_USER_ONLY
 466
 467 static inline void cpu_unassigned_access(CPUState *cpu, hwaddr addr,
 468                                          bool is_write, bool is_exec,
 469                                          int opaque, unsigned size)
 470 {
 471     CPUClass *cc = CPU_GET_CLASS(cpu);
 472
 473     if (cc->do_unassigned_access) {
 474         cc->do_unassigned_access(cpu, addr, is_write, is_exec, opaque, size);
 475     }
 476 }
 477
 478 #endif
 479
 480 /**
 481  * cpu_reset_interrupt:
 482  * @cpu: The CPU to clear the interrupt on.
 483  * @mask: The interrupt mask to clear.
 484  *
 485  * Resets interrupts on the vCPU @cpu.
 486  */
 487 void cpu_reset_interrupt(CPUState *cpu, int mask);
 488
 489 /**
 490  * cpu_exit:
 491  * @cpu: The CPU to exit.
 492  *
 493  * Requests the CPU @cpu to exit execution.
 494  */
 495 void cpu_exit(CPUState *cpu);
 496
 497 /**
 498  * cpu_resume:
 499  * @cpu: The CPU to resume.
 500  *
 501  * Resumes CPU, i.e. puts CPU into runnable state.
 502  */
 503 void cpu_resume(CPUState *cpu);
 504
 505 /**
 506  * qemu_init_vcpu:
 507  * @cpu: The vCPU to initialize.
 508  *
 509  * Initializes a vCPU.
 510  */
 511 void qemu_init_vcpu(CPUState *cpu);
 512
 513 #ifdef CONFIG_SOFTMMU
 514 extern const struct VMStateDescription vmstate_cpu_common;
 515 #else
 516 #define vmstate_cpu_common vmstate_dummy
 517 #endif
 518
 519 #define VMSTATE_CPU() {                                                     \
 520     .name = "parent_obj",                                                   \
 521     .size = sizeof(CPUState),                                               \
 522     .vmsd = &vmstate_cpu_common,                                            \
 523     .flags = VMS_STRUCT,                                                    \
 524     .offset = 0,                                                            \
 525 }
 526
 527 #endif