xref: /openbmc/qemu/accel/accel-system.c (revision 0017c64e)
1 /*
2  * QEMU accel class, system emulation components
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 "hw/boards.h"
29 #include "sysemu/cpus.h"
30 #include "qemu/error-report.h"
31 #include "accel-system.h"
32 
33 int accel_init_machine(AccelState *accel, MachineState *ms)
34 {
35     AccelClass *acc = ACCEL_GET_CLASS(accel);
36     int ret;
37     ms->accelerator = accel;
38     *(acc->allowed) = true;
39     ret = acc->init_machine(ms);
40     if (ret < 0) {
41         ms->accelerator = NULL;
42         *(acc->allowed) = false;
43         object_unref(OBJECT(accel));
44     } else {
45         object_set_accelerator_compat_props(acc->compat_props);
46     }
47     return ret;
48 }
49 
50 AccelState *current_accel(void)
51 {
52     return current_machine->accelerator;
53 }
54 
55 void accel_setup_post(MachineState *ms)
56 {
57     AccelState *accel = ms->accelerator;
58     AccelClass *acc = ACCEL_GET_CLASS(accel);
59     if (acc->setup_post) {
60         acc->setup_post(ms, accel);
61     }
62 }
63 
64 /* initialize the arch-independent accel operation interfaces */
65 void accel_init_ops_interfaces(AccelClass *ac)
66 {
67     const char *ac_name;
68     char *ops_name;
69     ObjectClass *oc;
70     AccelOpsClass *ops;
71 
72     ac_name = object_class_get_name(OBJECT_CLASS(ac));
73     g_assert(ac_name != NULL);
74 
75     ops_name = g_strdup_printf("%s" ACCEL_OPS_SUFFIX, ac_name);
76     ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));
77     oc = module_object_class_by_name(ops_name);
78     if (!oc) {
79         error_report("fatal: could not load module for type '%s'", ops_name);
80         exit(1);
81     }
82     g_free(ops_name);
83     ops = ACCEL_OPS_CLASS(oc);
84     /*
85      * all accelerators need to define ops, providing at least a mandatory
86      * non-NULL create_vcpu_thread operation.
87      */
88     g_assert(ops != NULL);
89     if (ops->ops_init) {
90         ops->ops_init(ops);
91     }
92     cpus_register_accel(ops);
93 }
94 
95 static const TypeInfo accel_ops_type_info = {
96     .name = TYPE_ACCEL_OPS,
97     .parent = TYPE_OBJECT,
98     .abstract = true,
99     .class_size = sizeof(AccelOpsClass),
100 };
101 
102 static void accel_system_register_types(void)
103 {
104     type_register_static(&accel_ops_type_info);
105 }
106 type_init(accel_system_register_types);
107