1 /* 2 * QEMU accel class, components common to system emulation and user mode 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * Copyright (c) 2014 Red Hat Inc. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 #include "qemu/osdep.h" 27 #include "qemu/accel.h" 28 #include "qemu/target-info.h" 29 30 #include "cpu.h" 31 #include "accel/accel-cpu-target.h" 32 33 #ifndef CONFIG_USER_ONLY 34 #include "accel-system.h" 35 #endif /* !CONFIG_USER_ONLY */ 36 37 static const TypeInfo accel_type = { 38 .name = TYPE_ACCEL, 39 .parent = TYPE_OBJECT, 40 .class_size = sizeof(AccelClass), 41 .instance_size = sizeof(AccelState), 42 .abstract = true, 43 }; 44 45 /* Lookup AccelClass from opt_name. Returns NULL if not found */ 46 AccelClass *accel_find(const char *opt_name) 47 { 48 char *class_name = g_strdup_printf(ACCEL_CLASS_NAME("%s"), opt_name); 49 AccelClass *ac = ACCEL_CLASS(module_object_class_by_name(class_name)); 50 g_free(class_name); 51 return ac; 52 } 53 54 /* Return the name of the current accelerator */ 55 const char *current_accel_name(void) 56 { 57 AccelClass *ac = ACCEL_GET_CLASS(current_accel()); 58 59 return ac->name; 60 } 61 62 static void accel_init_cpu_int_aux(ObjectClass *klass, void *opaque) 63 { 64 CPUClass *cc = CPU_CLASS(klass); 65 AccelCPUClass *accel_cpu = opaque; 66 67 /* 68 * The first callback allows accel-cpu to run initializations 69 * for the CPU, customizing CPU behavior according to the accelerator. 70 * 71 * The second one allows the CPU to customize the accel-cpu 72 * behavior according to the CPU. 73 * 74 * The second is currently only used by TCG, to specialize the 75 * TCGCPUOps depending on the CPU type. 76 */ 77 cc->accel_cpu = accel_cpu; 78 if (accel_cpu->cpu_class_init) { 79 accel_cpu->cpu_class_init(cc); 80 } 81 if (cc->init_accel_cpu) { 82 cc->init_accel_cpu(accel_cpu, cc); 83 } 84 } 85 86 /* initialize the arch-specific accel CpuClass interfaces */ 87 static void accel_init_cpu_interfaces(AccelClass *ac) 88 { 89 const char *ac_name; /* AccelClass name */ 90 char *acc_name; /* AccelCPUClass name */ 91 ObjectClass *acc; /* AccelCPUClass */ 92 const char *cpu_resolving_type = target_cpu_type(); 93 94 ac_name = object_class_get_name(OBJECT_CLASS(ac)); 95 g_assert(ac_name != NULL); 96 97 acc_name = g_strdup_printf("%s-%s", ac_name, cpu_resolving_type); 98 acc = object_class_by_name(acc_name); 99 g_free(acc_name); 100 101 if (acc) { 102 object_class_foreach(accel_init_cpu_int_aux, 103 cpu_resolving_type, false, acc); 104 } 105 } 106 107 void accel_init_interfaces(AccelClass *ac) 108 { 109 #ifndef CONFIG_USER_ONLY 110 accel_system_init_ops_interfaces(ac); 111 #endif /* !CONFIG_USER_ONLY */ 112 113 accel_init_cpu_interfaces(ac); 114 } 115 116 void accel_cpu_instance_init(CPUState *cpu) 117 { 118 if (cpu->cc->accel_cpu && cpu->cc->accel_cpu->cpu_instance_init) { 119 cpu->cc->accel_cpu->cpu_instance_init(cpu); 120 } 121 } 122 123 bool accel_cpu_common_realize(CPUState *cpu, Error **errp) 124 { 125 AccelState *accel = current_accel(); 126 AccelClass *acc = ACCEL_GET_CLASS(accel); 127 128 /* target specific realization */ 129 if (cpu->cc->accel_cpu 130 && cpu->cc->accel_cpu->cpu_target_realize 131 && !cpu->cc->accel_cpu->cpu_target_realize(cpu, errp)) { 132 return false; 133 } 134 135 /* generic realization */ 136 if (acc->cpu_common_realize && !acc->cpu_common_realize(cpu, errp)) { 137 return false; 138 } 139 140 return true; 141 } 142 143 void accel_cpu_common_unrealize(CPUState *cpu) 144 { 145 AccelState *accel = current_accel(); 146 AccelClass *acc = ACCEL_GET_CLASS(accel); 147 148 /* generic unrealization */ 149 if (acc->cpu_common_unrealize) { 150 acc->cpu_common_unrealize(cpu); 151 } 152 } 153 154 int accel_supported_gdbstub_sstep_flags(void) 155 { 156 AccelState *accel = current_accel(); 157 AccelClass *acc = ACCEL_GET_CLASS(accel); 158 if (acc->gdbstub_supported_sstep_flags) { 159 return acc->gdbstub_supported_sstep_flags(); 160 } 161 return 0; 162 } 163 164 static const TypeInfo accel_cpu_type = { 165 .name = TYPE_ACCEL_CPU, 166 .parent = TYPE_OBJECT, 167 .abstract = true, 168 .class_size = sizeof(AccelCPUClass), 169 }; 170 171 static void register_accel_types(void) 172 { 173 type_register_static(&accel_type); 174 type_register_static(&accel_cpu_type); 175 } 176 177 type_init(register_accel_types); 178