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 29 #include "cpu.h" 30 #include "accel/accel-cpu-target.h" 31 32 #ifndef CONFIG_USER_ONLY 33 #include "accel-system.h" 34 #endif /* !CONFIG_USER_ONLY */ 35 36 static const TypeInfo accel_type = { 37 .name = TYPE_ACCEL, 38 .parent = TYPE_OBJECT, 39 .class_size = sizeof(AccelClass), 40 .instance_size = sizeof(AccelState), 41 .abstract = true, 42 }; 43 44 /* Lookup AccelClass from opt_name. Returns NULL if not found */ 45 AccelClass *accel_find(const char *opt_name) 46 { 47 char *class_name = g_strdup_printf(ACCEL_CLASS_NAME("%s"), opt_name); 48 AccelClass *ac = ACCEL_CLASS(module_object_class_by_name(class_name)); 49 g_free(class_name); 50 return ac; 51 } 52 53 /* Return the name of the current accelerator */ 54 const char *current_accel_name(void) 55 { 56 AccelClass *ac = ACCEL_GET_CLASS(current_accel()); 57 58 return ac->name; 59 } 60 61 static void accel_init_cpu_int_aux(ObjectClass *klass, void *opaque) 62 { 63 CPUClass *cc = CPU_CLASS(klass); 64 AccelCPUClass *accel_cpu = opaque; 65 66 /* 67 * The first callback allows accel-cpu to run initializations 68 * for the CPU, customizing CPU behavior according to the accelerator. 69 * 70 * The second one allows the CPU to customize the accel-cpu 71 * behavior according to the CPU. 72 * 73 * The second is currently only used by TCG, to specialize the 74 * TCGCPUOps depending on the CPU type. 75 */ 76 cc->accel_cpu = accel_cpu; 77 if (accel_cpu->cpu_class_init) { 78 accel_cpu->cpu_class_init(cc); 79 } 80 if (cc->init_accel_cpu) { 81 cc->init_accel_cpu(accel_cpu, cc); 82 } 83 } 84 85 /* initialize the arch-specific accel CpuClass interfaces */ 86 static void accel_init_cpu_interfaces(AccelClass *ac) 87 { 88 const char *ac_name; /* AccelClass name */ 89 char *acc_name; /* AccelCPUClass name */ 90 ObjectClass *acc; /* AccelCPUClass */ 91 92 ac_name = object_class_get_name(OBJECT_CLASS(ac)); 93 g_assert(ac_name != NULL); 94 95 acc_name = g_strdup_printf("%s-%s", ac_name, CPU_RESOLVING_TYPE); 96 acc = object_class_by_name(acc_name); 97 g_free(acc_name); 98 99 if (acc) { 100 object_class_foreach(accel_init_cpu_int_aux, 101 CPU_RESOLVING_TYPE, false, acc); 102 } 103 } 104 105 void accel_init_interfaces(AccelClass *ac) 106 { 107 #ifndef CONFIG_USER_ONLY 108 accel_system_init_ops_interfaces(ac); 109 #endif /* !CONFIG_USER_ONLY */ 110 111 accel_init_cpu_interfaces(ac); 112 } 113 114 void accel_cpu_instance_init(CPUState *cpu) 115 { 116 if (cpu->cc->accel_cpu && cpu->cc->accel_cpu->cpu_instance_init) { 117 cpu->cc->accel_cpu->cpu_instance_init(cpu); 118 } 119 } 120 121 bool accel_cpu_common_realize(CPUState *cpu, Error **errp) 122 { 123 AccelState *accel = current_accel(); 124 AccelClass *acc = ACCEL_GET_CLASS(accel); 125 126 /* target specific realization */ 127 if (cpu->cc->accel_cpu 128 && cpu->cc->accel_cpu->cpu_target_realize 129 && !cpu->cc->accel_cpu->cpu_target_realize(cpu, errp)) { 130 return false; 131 } 132 133 /* generic realization */ 134 if (acc->cpu_common_realize && !acc->cpu_common_realize(cpu, errp)) { 135 return false; 136 } 137 138 return true; 139 } 140 141 void accel_cpu_common_unrealize(CPUState *cpu) 142 { 143 AccelState *accel = current_accel(); 144 AccelClass *acc = ACCEL_GET_CLASS(accel); 145 146 /* generic unrealization */ 147 if (acc->cpu_common_unrealize) { 148 acc->cpu_common_unrealize(cpu); 149 } 150 } 151 152 int accel_supported_gdbstub_sstep_flags(void) 153 { 154 AccelState *accel = current_accel(); 155 AccelClass *acc = ACCEL_GET_CLASS(accel); 156 if (acc->gdbstub_supported_sstep_flags) { 157 return acc->gdbstub_supported_sstep_flags(); 158 } 159 return 0; 160 } 161 162 static const TypeInfo accel_cpu_type = { 163 .name = TYPE_ACCEL_CPU, 164 .parent = TYPE_OBJECT, 165 .abstract = true, 166 .class_size = sizeof(AccelCPUClass), 167 }; 168 169 static void register_accel_types(void) 170 { 171 type_register_static(&accel_type); 172 type_register_static(&accel_cpu_type); 173 } 174 175 type_init(register_accel_types); 176