/* * QEMU CPU model * * Copyright (c) 2012-2014 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 * <http://www.gnu.org/licenses/gpl-2.0.html> */ #include "qemu/osdep.h" #include "qapi/error.h" #include "qemu-common.h" #include "qom/cpu.h" #include "sysemu/hw_accel.h" #include "qemu/notify.h" #include "qemu/log.h" #include "exec/log.h" #include "exec/cpu-common.h" #include "qemu/error-report.h" #include "sysemu/sysemu.h" #include "hw/boards.h" #include "hw/qdev-properties.h" #include "trace-root.h" CPUInterruptHandler cpu_interrupt_handler; CPUState *cpu_by_arch_id(int64_t id) { CPUState *cpu; CPU_FOREACH(cpu) { CPUClass *cc = CPU_GET_CLASS(cpu); if (cc->get_arch_id(cpu) == id) { return cpu; } } return NULL; } bool cpu_exists(int64_t id) { return !!cpu_by_arch_id(id); } CPUState *cpu_create(const char *typename) { Error *err = NULL; CPUState *cpu = CPU(object_new(typename)); object_property_set_bool(OBJECT(cpu), true, "realized", &err); if (err != NULL) { error_report_err(err); object_unref(OBJECT(cpu)); exit(EXIT_FAILURE); } return cpu; } const char *cpu_parse_cpu_model(const char *typename, const char *cpu_model) { ObjectClass *oc; CPUClass *cc; gchar **model_pieces; const char *cpu_type; model_pieces = g_strsplit(cpu_model, ",", 2); oc = cpu_class_by_name(typename, model_pieces[0]); if (oc == NULL) { error_report("unable to find CPU model '%s'", model_pieces[0]); g_strfreev(model_pieces); exit(EXIT_FAILURE); } cpu_type = object_class_get_name(oc); cc = CPU_CLASS(oc); cc->parse_features(cpu_type, model_pieces[1], &error_fatal); g_strfreev(model_pieces); return cpu_type; } CPUState *cpu_generic_init(const char *typename, const char *cpu_model) { /* TODO: all callers of cpu_generic_init() need to be converted to * call cpu_parse_features() only once, before calling cpu_generic_init(). */ return cpu_create(cpu_parse_cpu_model(typename, cpu_model)); } bool cpu_paging_enabled(const CPUState *cpu) { CPUClass *cc = CPU_GET_CLASS(cpu); return cc->get_paging_enabled(cpu); } static bool cpu_common_get_paging_enabled(const CPUState *cpu) { return false; } void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list, Error **errp) { CPUClass *cc = CPU_GET_CLASS(cpu); cc->get_memory_mapping(cpu, list, errp); } static void cpu_common_get_memory_mapping(CPUState *cpu, MemoryMappingList *list, Error **errp) { error_setg(errp, "Obtaining memory mappings is unsupported on this CPU."); } /* Resetting the IRQ comes from across the code base so we take the * BQL here if we need to. cpu_interrupt assumes it is held.*/ void cpu_reset_interrupt(CPUState *cpu, int mask) { bool need_lock = !qemu_mutex_iothread_locked(); if (need_lock) { qemu_mutex_lock_iothread(); } cpu->interrupt_request &= ~mask; if (need_lock) { qemu_mutex_unlock_iothread(); } } void cpu_exit(CPUState *cpu) { atomic_set(&cpu->exit_request, 1); /* Ensure cpu_exec will see the exit request after TCG has exited. */ smp_wmb(); atomic_set(&cpu->icount_decr.u16.high, -1); } int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu, void *opaque) { CPUClass *cc = CPU_GET_CLASS(cpu); return (*cc->write_elf32_qemunote)(f, cpu, opaque); } static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu, void *opaque) { return 0; } int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu, int cpuid, void *opaque) { CPUClass *cc = CPU_GET_CLASS(cpu); return (*cc->write_elf32_note)(f, cpu, cpuid, opaque); } static int cpu_common_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu, int cpuid, void *opaque) { return -1; } int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu, void *opaque) { CPUClass *cc = CPU_GET_CLASS(cpu); return (*cc->write_elf64_qemunote)(f, cpu, opaque); } static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu, void *opaque) { return 0; } int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu, int cpuid, void *opaque) { CPUClass *cc = CPU_GET_CLASS(cpu); return (*cc->write_elf64_note)(f, cpu, cpuid, opaque); } static int cpu_common_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu, int cpuid, void *opaque) { return -1; } static int cpu_common_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg) { return 0; } static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg) { return 0; } static bool cpu_common_debug_check_watchpoint(CPUState *cpu, CPUWatchpoint *wp) { /* If no extra check is required, QEMU watchpoint match can be considered * as an architectural match. */ return true; } bool target_words_bigendian(void); static bool cpu_common_virtio_is_big_endian(CPUState *cpu) { return target_words_bigendian(); } static void cpu_common_noop(CPUState *cpu) { } static bool cpu_common_exec_interrupt(CPUState *cpu, int int_req) { return false; } GuestPanicInformation *cpu_get_crash_info(CPUState *cpu) { CPUClass *cc = CPU_GET_CLASS(cpu); GuestPanicInformation *res = NULL; if (cc->get_crash_info) { res = cc->get_crash_info(cpu); } return res; } void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf, int flags) { CPUClass *cc = CPU_GET_CLASS(cpu); if (cc->dump_state) { cpu_synchronize_state(cpu); cc->dump_state(cpu, f, cpu_fprintf, flags); } } void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf, int flags) { CPUClass *cc = CPU_GET_CLASS(cpu); if (cc->dump_statistics) { cc->dump_statistics(cpu, f, cpu_fprintf, flags); } } void cpu_reset(CPUState *cpu) { CPUClass *klass = CPU_GET_CLASS(cpu); if (klass->reset != NULL) { (*klass->reset)(cpu); } trace_guest_cpu_reset(cpu); } static void cpu_common_reset(CPUState *cpu) { CPUClass *cc = CPU_GET_CLASS(cpu); if (qemu_loglevel_mask(CPU_LOG_RESET)) { qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index); log_cpu_state(cpu, cc->reset_dump_flags); } cpu->interrupt_request = 0; cpu->halted = 0; cpu->mem_io_pc = 0; cpu->mem_io_vaddr = 0; cpu->icount_extra = 0; cpu->icount_decr.u32 = 0; cpu->can_do_io = 1; cpu->exception_index = -1; cpu->crash_occurred = false; cpu->cflags_next_tb = -1; if (tcg_enabled()) { cpu_tb_jmp_cache_clear(cpu); tcg_flush_softmmu_tlb(cpu); } } static bool cpu_common_has_work(CPUState *cs) { return false; } ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model) { CPUClass *cc; if (!cpu_model) { return NULL; } cc = CPU_CLASS(object_class_by_name(typename)); return cc->class_by_name(cpu_model); } static ObjectClass *cpu_common_class_by_name(const char *cpu_model) { return NULL; } static void cpu_common_parse_features(const char *typename, char *features, Error **errp) { char *featurestr; /* Single "key=value" string being parsed */ char *val; static bool cpu_globals_initialized; /* TODO: all callers of ->parse_features() need to be changed to * call it only once, so we can remove this check (or change it * to assert(!cpu_globals_initialized). * Current callers of ->parse_features() are: * - cpu_generic_init() */ if (cpu_globals_initialized) { return; } cpu_globals_initialized = true; featurestr = features ? strtok(features, ",") : NULL; while (featurestr) { val = strchr(featurestr, '='); if (val) { GlobalProperty *prop = g_new0(typeof(*prop), 1); *val = 0; val++; prop->driver = typename; prop->property = g_strdup(featurestr); prop->value = g_strdup(val); prop->errp = &error_fatal; qdev_prop_register_global(prop); } else { error_setg(errp, "Expected key=value format, found %s.", featurestr); return; } featurestr = strtok(NULL, ","); } } static void cpu_common_realizefn(DeviceState *dev, Error **errp) { CPUState *cpu = CPU(dev); Object *machine = qdev_get_machine(); /* qdev_get_machine() can return something that's not TYPE_MACHINE * if this is one of the user-only emulators; in that case there's * no need to check the ignore_memory_transaction_failures board flag. */ if (object_dynamic_cast(machine, TYPE_MACHINE)) { ObjectClass *oc = object_get_class(machine); MachineClass *mc = MACHINE_CLASS(oc); if (mc) { cpu->ignore_memory_transaction_failures = mc->ignore_memory_transaction_failures; } } if (dev->hotplugged) { cpu_synchronize_post_init(cpu); cpu_resume(cpu); } /* NOTE: latest generic point where the cpu is fully realized */ trace_init_vcpu(cpu); } static void cpu_common_unrealizefn(DeviceState *dev, Error **errp) { CPUState *cpu = CPU(dev); /* NOTE: latest generic point before the cpu is fully unrealized */ trace_fini_vcpu(cpu); cpu_exec_unrealizefn(cpu); } static void cpu_common_initfn(Object *obj) { CPUState *cpu = CPU(obj); CPUClass *cc = CPU_GET_CLASS(obj); cpu->cpu_index = UNASSIGNED_CPU_INDEX; cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs; /* *-user doesn't have configurable SMP topology */ /* the default value is changed by qemu_init_vcpu() for softmmu */ cpu->nr_cores = 1; cpu->nr_threads = 1; qemu_mutex_init(&cpu->work_mutex); QTAILQ_INIT(&cpu->breakpoints); QTAILQ_INIT(&cpu->watchpoints); cpu_exec_initfn(cpu); } static void cpu_common_finalize(Object *obj) { } static int64_t cpu_common_get_arch_id(CPUState *cpu) { return cpu->cpu_index; } static vaddr cpu_adjust_watchpoint_address(CPUState *cpu, vaddr addr, int len) { return addr; } static void generic_handle_interrupt(CPUState *cpu, int mask) { cpu->interrupt_request |= mask; if (!qemu_cpu_is_self(cpu)) { qemu_cpu_kick(cpu); } } CPUInterruptHandler cpu_interrupt_handler = generic_handle_interrupt; static void cpu_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); CPUClass *k = CPU_CLASS(klass); k->class_by_name = cpu_common_class_by_name; k->parse_features = cpu_common_parse_features; k->reset = cpu_common_reset; k->get_arch_id = cpu_common_get_arch_id; k->has_work = cpu_common_has_work; k->get_paging_enabled = cpu_common_get_paging_enabled; k->get_memory_mapping = cpu_common_get_memory_mapping; k->write_elf32_qemunote = cpu_common_write_elf32_qemunote; k->write_elf32_note = cpu_common_write_elf32_note; k->write_elf64_qemunote = cpu_common_write_elf64_qemunote; k->write_elf64_note = cpu_common_write_elf64_note; k->gdb_read_register = cpu_common_gdb_read_register; k->gdb_write_register = cpu_common_gdb_write_register; k->virtio_is_big_endian = cpu_common_virtio_is_big_endian; k->debug_excp_handler = cpu_common_noop; k->debug_check_watchpoint = cpu_common_debug_check_watchpoint; k->cpu_exec_enter = cpu_common_noop; k->cpu_exec_exit = cpu_common_noop; k->cpu_exec_interrupt = cpu_common_exec_interrupt; k->adjust_watchpoint_address = cpu_adjust_watchpoint_address; set_bit(DEVICE_CATEGORY_CPU, dc->categories); dc->realize = cpu_common_realizefn; dc->unrealize = cpu_common_unrealizefn; dc->props = cpu_common_props; /* * Reason: CPUs still need special care by board code: wiring up * IRQs, adding reset handlers, halting non-first CPUs, ... */ dc->user_creatable = false; } static const TypeInfo cpu_type_info = { .name = TYPE_CPU, .parent = TYPE_DEVICE, .instance_size = sizeof(CPUState), .instance_init = cpu_common_initfn, .instance_finalize = cpu_common_finalize, .abstract = true, .class_size = sizeof(CPUClass), .class_init = cpu_class_init, }; static void cpu_register_types(void) { type_register_static(&cpu_type_info); } type_init(cpu_register_types)