xref: /openbmc/qemu/accel/accel-target.c (revision 2b74dd91)
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_system_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