/* * QEMU CPU model * * Copyright (c) 2012 SUSE LINUX Products GmbH * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see * */ #ifndef QEMU_CPU_H #define QEMU_CPU_H #include #include #include "hw/qdev-core.h" #include "exec/hwaddr.h" #include "qemu/queue.h" #include "qemu/thread.h" #include "qemu/tls.h" #include "qemu/typedefs.h" typedef int (*WriteCoreDumpFunction)(const void *buf, size_t size, void *opaque); /** * vaddr: * Type wide enough to contain any #target_ulong virtual address. */ typedef uint64_t vaddr; #define VADDR_PRId PRId64 #define VADDR_PRIu PRIu64 #define VADDR_PRIo PRIo64 #define VADDR_PRIx PRIx64 #define VADDR_PRIX PRIX64 #define VADDR_MAX UINT64_MAX /** * SECTION:cpu * @section_id: QEMU-cpu * @title: CPU Class * @short_description: Base class for all CPUs */ #define TYPE_CPU "cpu" #define CPU(obj) OBJECT_CHECK(CPUState, (obj), TYPE_CPU) #define CPU_CLASS(class) OBJECT_CLASS_CHECK(CPUClass, (class), TYPE_CPU) #define CPU_GET_CLASS(obj) OBJECT_GET_CLASS(CPUClass, (obj), TYPE_CPU) typedef struct CPUState CPUState; typedef void (*CPUUnassignedAccess)(CPUState *cpu, hwaddr addr, bool is_write, bool is_exec, int opaque, unsigned size); struct TranslationBlock; /** * CPUClass: * @class_by_name: Callback to map -cpu command line model name to an * instantiatable CPU type. * @parse_features: Callback to parse command line arguments. * @reset: Callback to reset the #CPUState to its initial state. * @reset_dump_flags: #CPUDumpFlags to use for reset logging. * @has_work: Callback for checking if there is work to do. * @do_interrupt: Callback for interrupt handling. * @do_unassigned_access: Callback for unassigned access handling. * @memory_rw_debug: Callback for GDB memory access. * @dump_state: Callback for dumping state. * @dump_statistics: Callback for dumping statistics. * @get_arch_id: Callback for getting architecture-dependent CPU ID. * @get_paging_enabled: Callback for inquiring whether paging is enabled. * @get_memory_mapping: Callback for obtaining the memory mappings. * @set_pc: Callback for setting the Program Counter register. * @synchronize_from_tb: Callback for synchronizing state from a TCG * #TranslationBlock. * @handle_mmu_fault: Callback for handling an MMU fault. * @get_phys_page_debug: Callback for obtaining a physical address. * @gdb_read_register: Callback for letting GDB read a register. * @gdb_write_register: Callback for letting GDB write a register. * @vmsd: State description for migration. * @gdb_num_core_regs: Number of core registers accessible to GDB. * @gdb_core_xml_file: File name for core registers GDB XML description. * * Represents a CPU family or model. */ typedef struct CPUClass { /*< private >*/ DeviceClass parent_class; /*< public >*/ ObjectClass *(*class_by_name)(const char *cpu_model); void (*parse_features)(CPUState *cpu, char *str, Error **errp); void (*reset)(CPUState *cpu); int reset_dump_flags; bool (*has_work)(CPUState *cpu); void (*do_interrupt)(CPUState *cpu); CPUUnassignedAccess do_unassigned_access; int (*memory_rw_debug)(CPUState *cpu, vaddr addr, uint8_t *buf, int len, bool is_write); void (*dump_state)(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf, int flags); void (*dump_statistics)(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf, int flags); int64_t (*get_arch_id)(CPUState *cpu); bool (*get_paging_enabled)(const CPUState *cpu); void (*get_memory_mapping)(CPUState *cpu, MemoryMappingList *list, Error **errp); void (*set_pc)(CPUState *cpu, vaddr value); void (*synchronize_from_tb)(CPUState *cpu, struct TranslationBlock *tb); int (*handle_mmu_fault)(CPUState *cpu, vaddr address, int rw, int mmu_index); hwaddr (*get_phys_page_debug)(CPUState *cpu, vaddr addr); int (*gdb_read_register)(CPUState *cpu, uint8_t *buf, int reg); int (*gdb_write_register)(CPUState *cpu, uint8_t *buf, int reg); int (*write_elf64_note)(WriteCoreDumpFunction f, CPUState *cpu, int cpuid, void *opaque); int (*write_elf64_qemunote)(WriteCoreDumpFunction f, CPUState *cpu, void *opaque); int (*write_elf32_note)(WriteCoreDumpFunction f, CPUState *cpu, int cpuid, void *opaque); int (*write_elf32_qemunote)(WriteCoreDumpFunction f, CPUState *cpu, void *opaque); const struct VMStateDescription *vmsd; int gdb_num_core_regs; const char *gdb_core_xml_file; } CPUClass; #ifdef HOST_WORDS_BIGENDIAN typedef struct icount_decr_u16 { uint16_t high; uint16_t low; } icount_decr_u16; #else typedef struct icount_decr_u16 { uint16_t low; uint16_t high; } icount_decr_u16; #endif typedef struct CPUBreakpoint { vaddr pc; int flags; /* BP_* */ QTAILQ_ENTRY(CPUBreakpoint) entry; } CPUBreakpoint; typedef struct CPUWatchpoint { vaddr vaddr; vaddr len_mask; int flags; /* BP_* */ QTAILQ_ENTRY(CPUWatchpoint) entry; } CPUWatchpoint; struct KVMState; struct kvm_run; #define TB_JMP_CACHE_BITS 12 #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS) /** * CPUState: * @cpu_index: CPU index (informative). * @nr_cores: Number of cores within this CPU package. * @nr_threads: Number of threads within this CPU. * @numa_node: NUMA node this CPU is belonging to. * @host_tid: Host thread ID. * @running: #true if CPU is currently running (usermode). * @created: Indicates whether the CPU thread has been successfully created. * @interrupt_request: Indicates a pending interrupt request. * @halted: Nonzero if the CPU is in suspended state. * @stop: Indicates a pending stop request. * @stopped: Indicates the CPU has been artificially stopped. * @tcg_exit_req: Set to force TCG to stop executing linked TBs for this * CPU and return to its top level loop. * @singlestep_enabled: Flags for single-stepping. * @icount_extra: Instructions until next timer event. * @icount_decr: Number of cycles left, with interrupt flag in high bit. * This allows a single read-compare-cbranch-write sequence to test * for both decrementer underflow and exceptions. * @can_do_io: Nonzero if memory-mapped IO is safe. * @env_ptr: Pointer to subclass-specific CPUArchState field. * @current_tb: Currently executing TB. * @gdb_regs: Additional GDB registers. * @gdb_num_regs: Number of total registers accessible to GDB. * @gdb_num_g_regs: Number of registers in GDB 'g' packets. * @next_cpu: Next CPU sharing TB cache. * @opaque: User data. * @mem_io_pc: Host Program Counter at which the memory was accessed. * @mem_io_vaddr: Target virtual address at which the memory was accessed. * @kvm_fd: vCPU file descriptor for KVM. * * State of one CPU core or thread. */ struct CPUState { /*< private >*/ DeviceState parent_obj; /*< public >*/ int nr_cores; int nr_threads; int numa_node; struct QemuThread *thread; #ifdef _WIN32 HANDLE hThread; #endif int thread_id; uint32_t host_tid; bool running; struct QemuCond *halt_cond; struct qemu_work_item *queued_work_first, *queued_work_last; bool thread_kicked; bool created; bool stop; bool stopped; volatile sig_atomic_t exit_request; volatile sig_atomic_t tcg_exit_req; uint32_t interrupt_request; int singlestep_enabled; int64_t icount_extra; sigjmp_buf jmp_env; AddressSpace *as; MemoryListener *tcg_as_listener; void *env_ptr; /* CPUArchState */ struct TranslationBlock *current_tb; struct TranslationBlock *tb_jmp_cache[TB_JMP_CACHE_SIZE]; struct GDBRegisterState *gdb_regs; int gdb_num_regs; int gdb_num_g_regs; QTAILQ_ENTRY(CPUState) node; /* ice debug support */ QTAILQ_HEAD(breakpoints_head, CPUBreakpoint) breakpoints; QTAILQ_HEAD(watchpoints_head, CPUWatchpoint) watchpoints; CPUWatchpoint *watchpoint_hit; void *opaque; /* In order to avoid passing too many arguments to the MMIO helpers, * we store some rarely used information in the CPU context. */ uintptr_t mem_io_pc; vaddr mem_io_vaddr; int kvm_fd; bool kvm_vcpu_dirty; struct KVMState *kvm_state; struct kvm_run *kvm_run; /* TODO Move common fields from CPUArchState here. */ int cpu_index; /* used by alpha TCG */ uint32_t halted; /* used by alpha, cris, ppc TCG */ union { uint32_t u32; icount_decr_u16 u16; } icount_decr; uint32_t can_do_io; int32_t exception_index; /* used by m68k TCG */ }; QTAILQ_HEAD(CPUTailQ, CPUState); extern struct CPUTailQ cpus; #define CPU_NEXT(cpu) QTAILQ_NEXT(cpu, node) #define CPU_FOREACH(cpu) QTAILQ_FOREACH(cpu, &cpus, node) #define CPU_FOREACH_SAFE(cpu, next_cpu) \ QTAILQ_FOREACH_SAFE(cpu, &cpus, node, next_cpu) #define first_cpu QTAILQ_FIRST(&cpus) DECLARE_TLS(CPUState *, current_cpu); #define current_cpu tls_var(current_cpu) /** * cpu_paging_enabled: * @cpu: The CPU whose state is to be inspected. * * Returns: %true if paging is enabled, %false otherwise. */ bool cpu_paging_enabled(const CPUState *cpu); /** * cpu_get_memory_mapping: * @cpu: The CPU whose memory mappings are to be obtained. * @list: Where to write the memory mappings to. * @errp: Pointer for reporting an #Error. */ void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list, Error **errp); /** * cpu_write_elf64_note: * @f: pointer to a function that writes memory to a file * @cpu: The CPU whose memory is to be dumped * @cpuid: ID number of the CPU * @opaque: pointer to the CPUState struct */ int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu, int cpuid, void *opaque); /** * cpu_write_elf64_qemunote: * @f: pointer to a function that writes memory to a file * @cpu: The CPU whose memory is to be dumped * @cpuid: ID number of the CPU * @opaque: pointer to the CPUState struct */ int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu, void *opaque); /** * cpu_write_elf32_note: * @f: pointer to a function that writes memory to a file * @cpu: The CPU whose memory is to be dumped * @cpuid: ID number of the CPU * @opaque: pointer to the CPUState struct */ int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu, int cpuid, void *opaque); /** * cpu_write_elf32_qemunote: * @f: pointer to a function that writes memory to a file * @cpu: The CPU whose memory is to be dumped * @cpuid: ID number of the CPU * @opaque: pointer to the CPUState struct */ int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu, void *opaque); /** * CPUDumpFlags: * @CPU_DUMP_CODE: * @CPU_DUMP_FPU: dump FPU register state, not just integer * @CPU_DUMP_CCOP: dump info about TCG QEMU's condition code optimization state */ enum CPUDumpFlags { CPU_DUMP_CODE = 0x00010000, CPU_DUMP_FPU = 0x00020000, CPU_DUMP_CCOP = 0x00040000, }; /** * cpu_dump_state: * @cpu: The CPU whose state is to be dumped. * @f: File to dump to. * @cpu_fprintf: Function to dump with. * @flags: Flags what to dump. * * Dumps CPU state. */ void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf, int flags); /** * cpu_dump_statistics: * @cpu: The CPU whose state is to be dumped. * @f: File to dump to. * @cpu_fprintf: Function to dump with. * @flags: Flags what to dump. * * Dumps CPU statistics. */ void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf, int flags); #ifndef CONFIG_USER_ONLY /** * cpu_get_phys_page_debug: * @cpu: The CPU to obtain the physical page address for. * @addr: The virtual address. * * Obtains the physical page corresponding to a virtual one. * Use it only for debugging because no protection checks are done. * * Returns: Corresponding physical page address or -1 if no page found. */ static inline hwaddr cpu_get_phys_page_debug(CPUState *cpu, vaddr addr) { CPUClass *cc = CPU_GET_CLASS(cpu); return cc->get_phys_page_debug(cpu, addr); } #endif /** * cpu_reset: * @cpu: The CPU whose state is to be reset. */ void cpu_reset(CPUState *cpu); /** * cpu_class_by_name: * @typename: The CPU base type. * @cpu_model: The model string without any parameters. * * Looks up a CPU #ObjectClass matching name @cpu_model. * * Returns: A #CPUClass or %NULL if not matching class is found. */ ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model); /** * cpu_generic_init: * @typename: The CPU base type. * @cpu_model: The model string including optional parameters. * * Instantiates a CPU, processes optional parameters and realizes the CPU. * * Returns: A #CPUState or %NULL if an error occurred. */ CPUState *cpu_generic_init(const char *typename, const char *cpu_model); /** * cpu_has_work: * @cpu: The vCPU to check. * * Checks whether the CPU has work to do. * * Returns: %true if the CPU has work, %false otherwise. */ static inline bool cpu_has_work(CPUState *cpu) { CPUClass *cc = CPU_GET_CLASS(cpu); g_assert(cc->has_work); return cc->has_work(cpu); } /** * qemu_cpu_is_self: * @cpu: The vCPU to check against. * * Checks whether the caller is executing on the vCPU thread. * * Returns: %true if called from @cpu's thread, %false otherwise. */ bool qemu_cpu_is_self(CPUState *cpu); /** * qemu_cpu_kick: * @cpu: The vCPU to kick. * * Kicks @cpu's thread. */ void qemu_cpu_kick(CPUState *cpu); /** * cpu_is_stopped: * @cpu: The CPU to check. * * Checks whether the CPU is stopped. * * Returns: %true if run state is not running or if artificially stopped; * %false otherwise. */ bool cpu_is_stopped(CPUState *cpu); /** * run_on_cpu: * @cpu: The vCPU to run on. * @func: The function to be executed. * @data: Data to pass to the function. * * Schedules the function @func for execution on the vCPU @cpu. */ void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data); /** * async_run_on_cpu: * @cpu: The vCPU to run on. * @func: The function to be executed. * @data: Data to pass to the function. * * Schedules the function @func for execution on the vCPU @cpu asynchronously. */ void async_run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data); /** * qemu_get_cpu: * @index: The CPUState@cpu_index value of the CPU to obtain. * * Gets a CPU matching @index. * * Returns: The CPU or %NULL if there is no matching CPU. */ CPUState *qemu_get_cpu(int index); /** * cpu_exists: * @id: Guest-exposed CPU ID to lookup. * * Search for CPU with specified ID. * * Returns: %true - CPU is found, %false - CPU isn't found. */ bool cpu_exists(int64_t id); #ifndef CONFIG_USER_ONLY typedef void (*CPUInterruptHandler)(CPUState *, int); extern CPUInterruptHandler cpu_interrupt_handler; /** * cpu_interrupt: * @cpu: The CPU to set an interrupt on. * @mask: The interupts to set. * * Invokes the interrupt handler. */ static inline void cpu_interrupt(CPUState *cpu, int mask) { cpu_interrupt_handler(cpu, mask); } #else /* USER_ONLY */ void cpu_interrupt(CPUState *cpu, int mask); #endif /* USER_ONLY */ #ifndef CONFIG_USER_ONLY static inline void cpu_unassigned_access(CPUState *cpu, hwaddr addr, bool is_write, bool is_exec, int opaque, unsigned size) { CPUClass *cc = CPU_GET_CLASS(cpu); if (cc->do_unassigned_access) { cc->do_unassigned_access(cpu, addr, is_write, is_exec, opaque, size); } } #endif /** * cpu_reset_interrupt: * @cpu: The CPU to clear the interrupt on. * @mask: The interrupt mask to clear. * * Resets interrupts on the vCPU @cpu. */ void cpu_reset_interrupt(CPUState *cpu, int mask); /** * cpu_exit: * @cpu: The CPU to exit. * * Requests the CPU @cpu to exit execution. */ void cpu_exit(CPUState *cpu); /** * cpu_resume: * @cpu: The CPU to resume. * * Resumes CPU, i.e. puts CPU into runnable state. */ void cpu_resume(CPUState *cpu); /** * qemu_init_vcpu: * @cpu: The vCPU to initialize. * * Initializes a vCPU. */ void qemu_init_vcpu(CPUState *cpu); #define SSTEP_ENABLE 0x1 /* Enable simulated HW single stepping */ #define SSTEP_NOIRQ 0x2 /* Do not use IRQ while single stepping */ #define SSTEP_NOTIMER 0x4 /* Do not Timers while single stepping */ /** * cpu_single_step: * @cpu: CPU to the flags for. * @enabled: Flags to enable. * * Enables or disables single-stepping for @cpu. */ void cpu_single_step(CPUState *cpu, int enabled); /* Breakpoint/watchpoint flags */ #define BP_MEM_READ 0x01 #define BP_MEM_WRITE 0x02 #define BP_MEM_ACCESS (BP_MEM_READ | BP_MEM_WRITE) #define BP_STOP_BEFORE_ACCESS 0x04 #define BP_WATCHPOINT_HIT 0x08 #define BP_GDB 0x10 #define BP_CPU 0x20 int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags, CPUBreakpoint **breakpoint); int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags); void cpu_breakpoint_remove_by_ref(CPUState *cpu, CPUBreakpoint *breakpoint); void cpu_breakpoint_remove_all(CPUState *cpu, int mask); int cpu_watchpoint_insert(CPUState *cpu, vaddr addr, vaddr len, int flags, CPUWatchpoint **watchpoint); int cpu_watchpoint_remove(CPUState *cpu, vaddr addr, vaddr len, int flags); void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUWatchpoint *watchpoint); void cpu_watchpoint_remove_all(CPUState *cpu, int mask); #ifdef CONFIG_SOFTMMU extern const struct VMStateDescription vmstate_cpu_common; #else #define vmstate_cpu_common vmstate_dummy #endif #define VMSTATE_CPU() { \ .name = "parent_obj", \ .size = sizeof(CPUState), \ .vmsd = &vmstate_cpu_common, \ .flags = VMS_STRUCT, \ .offset = 0, \ } #endif