1 /*
2 * QEMU System Emulator, accelerator interfaces
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 "sysemu/accel.h"
28 #include "hw/boards.h"
29 #include "sysemu/arch_init.h"
30 #include "sysemu/sysemu.h"
31 #include "sysemu/kvm.h"
32 #include "sysemu/qtest.h"
33 #include "hw/xen/xen.h"
34 #include "qom/object.h"
35 #include "qemu/error-report.h"
36 #include "qemu/option.h"
37
38 static const TypeInfo accel_type = {
39 .name = TYPE_ACCEL,
40 .parent = TYPE_OBJECT,
41 .class_size = sizeof(AccelClass),
42 .instance_size = sizeof(AccelState),
43 };
44
45 /* Lookup AccelClass from opt_name. Returns NULL if not found */
accel_find(const char * opt_name)46 static AccelClass *accel_find(const char *opt_name)
47 {
48 char *class_name = g_strdup_printf(ACCEL_CLASS_NAME("%s"), opt_name);
49 AccelClass *ac = ACCEL_CLASS(object_class_by_name(class_name));
50 g_free(class_name);
51 return ac;
52 }
53
accel_init_machine(AccelClass * acc,MachineState * ms)54 static int accel_init_machine(AccelClass *acc, MachineState *ms)
55 {
56 ObjectClass *oc = OBJECT_CLASS(acc);
57 const char *cname = object_class_get_name(oc);
58 AccelState *accel = ACCEL(object_new(cname));
59 int ret;
60 ms->accelerator = accel;
61 *(acc->allowed) = true;
62 ret = acc->init_machine(ms);
63 if (ret < 0) {
64 ms->accelerator = NULL;
65 *(acc->allowed) = false;
66 object_unref(OBJECT(accel));
67 }
68 return ret;
69 }
70
configure_accelerator(MachineState * ms)71 void configure_accelerator(MachineState *ms)
72 {
73 const char *accel;
74 char **accel_list, **tmp;
75 int ret;
76 bool accel_initialised = false;
77 bool init_failed = false;
78 AccelClass *acc = NULL;
79
80 accel = qemu_opt_get(qemu_get_machine_opts(), "accel");
81 if (accel == NULL) {
82 /* Use the default "accelerator", tcg */
83 accel = "tcg";
84 }
85
86 accel_list = g_strsplit(accel, ":", 0);
87
88 for (tmp = accel_list; !accel_initialised && tmp && *tmp; tmp++) {
89 acc = accel_find(*tmp);
90 if (!acc) {
91 continue;
92 }
93 if (acc->available && !acc->available()) {
94 printf("%s not supported for this target\n",
95 acc->name);
96 continue;
97 }
98 ret = accel_init_machine(acc, ms);
99 if (ret < 0) {
100 init_failed = true;
101 error_report("failed to initialize %s: %s",
102 acc->name, strerror(-ret));
103 } else {
104 accel_initialised = true;
105 }
106 }
107 g_strfreev(accel_list);
108
109 if (!accel_initialised) {
110 if (!init_failed) {
111 error_report("-machine accel=%s: No accelerator found", accel);
112 }
113 exit(1);
114 }
115
116 if (init_failed) {
117 error_report("Back to %s accelerator", acc->name);
118 }
119 }
120
accel_register_compat_props(AccelState * accel)121 void accel_register_compat_props(AccelState *accel)
122 {
123 AccelClass *class = ACCEL_GET_CLASS(accel);
124 register_compat_props_array(class->global_props);
125 }
126
accel_setup_post(MachineState * ms)127 void accel_setup_post(MachineState *ms)
128 {
129 AccelState *accel = ms->accelerator;
130 AccelClass *acc = ACCEL_GET_CLASS(accel);
131 if (acc->setup_post) {
132 acc->setup_post(ms, accel);
133 }
134 }
135
register_accel_types(void)136 static void register_accel_types(void)
137 {
138 type_register_static(&accel_type);
139 }
140
141 type_init(register_accel_types);
142