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 "hw/core/accel-cpu.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 }; 42 43 /* Lookup AccelClass from opt_name. Returns NULL if not found */ 44 AccelClass *accel_find(const char *opt_name) 45 { 46 char *class_name = g_strdup_printf(ACCEL_CLASS_NAME("%s"), opt_name); 47 AccelClass *ac = ACCEL_CLASS(module_object_class_by_name(class_name)); 48 g_free(class_name); 49 return ac; 50 } 51 52 /* Return the name of the current accelerator */ 53 const char *current_accel_name(void) 54 { 55 AccelClass *ac = ACCEL_GET_CLASS(current_accel()); 56 57 return ac->name; 58 } 59 60 static void accel_init_cpu_int_aux(ObjectClass *klass, void *opaque) 61 { 62 CPUClass *cc = CPU_CLASS(klass); 63 AccelCPUClass *accel_cpu = opaque; 64 65 /* 66 * The first callback allows accel-cpu to run initializations 67 * for the CPU, customizing CPU behavior according to the accelerator. 68 * 69 * The second one allows the CPU to customize the accel-cpu 70 * behavior according to the CPU. 71 * 72 * The second is currently only used by TCG, to specialize the 73 * TCGCPUOps depending on the CPU type. 74 */ 75 cc->accel_cpu = accel_cpu; 76 if (accel_cpu->cpu_class_init) { 77 accel_cpu->cpu_class_init(cc); 78 } 79 if (cc->init_accel_cpu) { 80 cc->init_accel_cpu(accel_cpu, cc); 81 } 82 } 83 84 /* initialize the arch-specific accel CpuClass interfaces */ 85 static void accel_init_cpu_interfaces(AccelClass *ac) 86 { 87 const char *ac_name; /* AccelClass name */ 88 char *acc_name; /* AccelCPUClass name */ 89 ObjectClass *acc; /* AccelCPUClass */ 90 91 ac_name = object_class_get_name(OBJECT_CLASS(ac)); 92 g_assert(ac_name != NULL); 93 94 acc_name = g_strdup_printf("%s-%s", ac_name, CPU_RESOLVING_TYPE); 95 acc = object_class_by_name(acc_name); 96 g_free(acc_name); 97 98 if (acc) { 99 object_class_foreach(accel_init_cpu_int_aux, 100 CPU_RESOLVING_TYPE, false, acc); 101 } 102 } 103 104 void accel_init_interfaces(AccelClass *ac) 105 { 106 #ifndef CONFIG_USER_ONLY 107 accel_init_ops_interfaces(ac); 108 #endif /* !CONFIG_USER_ONLY */ 109 110 accel_init_cpu_interfaces(ac); 111 } 112 113 void accel_cpu_instance_init(CPUState *cpu) 114 { 115 CPUClass *cc = CPU_GET_CLASS(cpu); 116 117 if (cc->accel_cpu && cc->accel_cpu->cpu_instance_init) { 118 cc->accel_cpu->cpu_instance_init(cpu); 119 } 120 } 121 122 bool accel_cpu_common_realize(CPUState *cpu, Error **errp) 123 { 124 CPUClass *cc = CPU_GET_CLASS(cpu); 125 AccelState *accel = current_accel(); 126 AccelClass *acc = ACCEL_GET_CLASS(accel); 127 128 /* target specific realization */ 129 if (cc->accel_cpu && cc->accel_cpu->cpu_target_realize 130 && !cc->accel_cpu->cpu_target_realize(cpu, errp)) { 131 return false; 132 } 133 134 /* generic realization */ 135 if (acc->cpu_common_realize && !acc->cpu_common_realize(cpu, errp)) { 136 return false; 137 } 138 139 return true; 140 } 141 142 void accel_cpu_common_unrealize(CPUState *cpu) 143 { 144 AccelState *accel = current_accel(); 145 AccelClass *acc = ACCEL_GET_CLASS(accel); 146 147 /* generic unrealization */ 148 if (acc->cpu_common_unrealize) { 149 acc->cpu_common_unrealize(cpu); 150 } 151 } 152 153 int accel_supported_gdbstub_sstep_flags(void) 154 { 155 AccelState *accel = current_accel(); 156 AccelClass *acc = ACCEL_GET_CLASS(accel); 157 if (acc->gdbstub_supported_sstep_flags) { 158 return acc->gdbstub_supported_sstep_flags(); 159 } 160 return 0; 161 } 162 163 static const TypeInfo accel_cpu_type = { 164 .name = TYPE_ACCEL_CPU, 165 .parent = TYPE_OBJECT, 166 .abstract = true, 167 .class_size = sizeof(AccelCPUClass), 168 }; 169 170 static void register_accel_types(void) 171 { 172 type_register_static(&accel_type); 173 type_register_static(&accel_cpu_type); 174 } 175 176 type_init(register_accel_types); 177