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 */
accel_find(const char * opt_name)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 */
current_accel_name(void)54 const char *current_accel_name(void)
55 {
56 AccelClass *ac = ACCEL_GET_CLASS(current_accel());
57
58 return ac->name;
59 }
60
accel_init_cpu_int_aux(ObjectClass * klass,void * opaque)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 */
accel_init_cpu_interfaces(AccelClass * ac)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
accel_init_interfaces(AccelClass * ac)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
accel_cpu_instance_init(CPUState * cpu)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
accel_cpu_common_realize(CPUState * cpu,Error ** errp)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
accel_cpu_common_unrealize(CPUState * cpu)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
accel_supported_gdbstub_sstep_flags(void)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
register_accel_types(void)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