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 | #include "qapi/error.h" |
38 | |
39 | static const TypeInfo accel_type = { |
40 | .name = TYPE_ACCEL, |
41 | .parent = TYPE_OBJECT, |
42 | .class_size = sizeof(AccelClass), |
43 | .instance_size = sizeof(AccelState), |
44 | }; |
45 | |
46 | /* Lookup AccelClass from opt_name. Returns NULL if not found */ |
47 | static AccelClass *accel_find(const char *opt_name) |
48 | { |
49 | char *class_name = g_strdup_printf(ACCEL_CLASS_NAME("%s" ), opt_name); |
50 | AccelClass *ac = ACCEL_CLASS(object_class_by_name(class_name)); |
51 | g_free(class_name); |
52 | return ac; |
53 | } |
54 | |
55 | static int accel_init_machine(AccelClass *acc, MachineState *ms) |
56 | { |
57 | ObjectClass *oc = OBJECT_CLASS(acc); |
58 | const char *cname = object_class_get_name(oc); |
59 | AccelState *accel = ACCEL(object_new(cname)); |
60 | int ret; |
61 | ms->accelerator = accel; |
62 | *(acc->allowed) = true; |
63 | ret = acc->init_machine(ms); |
64 | if (ret < 0) { |
65 | ms->accelerator = NULL; |
66 | *(acc->allowed) = false; |
67 | object_unref(OBJECT(accel)); |
68 | } else { |
69 | object_set_accelerator_compat_props(acc->compat_props); |
70 | } |
71 | return ret; |
72 | } |
73 | |
74 | void configure_accelerator(MachineState *ms, const char *progname) |
75 | { |
76 | const char *accel; |
77 | char **accel_list, **tmp; |
78 | int ret; |
79 | bool accel_initialised = false; |
80 | bool init_failed = false; |
81 | AccelClass *acc = NULL; |
82 | |
83 | accel = qemu_opt_get(qemu_get_machine_opts(), "accel" ); |
84 | if (accel == NULL) { |
85 | /* Select the default accelerator */ |
86 | int pnlen = strlen(progname); |
87 | if (pnlen >= 3 && g_str_equal(&progname[pnlen - 3], "kvm" )) { |
88 | /* If the program name ends with "kvm", we prefer KVM */ |
89 | accel = "kvm:tcg" ; |
90 | } else { |
91 | #if defined(CONFIG_TCG) |
92 | accel = "tcg" ; |
93 | #elif defined(CONFIG_KVM) |
94 | accel = "kvm" ; |
95 | #else |
96 | error_report("No accelerator selected and" |
97 | " no default accelerator available" ); |
98 | exit(1); |
99 | #endif |
100 | } |
101 | } |
102 | |
103 | accel_list = g_strsplit(accel, ":" , 0); |
104 | |
105 | for (tmp = accel_list; !accel_initialised && tmp && *tmp; tmp++) { |
106 | acc = accel_find(*tmp); |
107 | if (!acc) { |
108 | continue; |
109 | } |
110 | ret = accel_init_machine(acc, ms); |
111 | if (ret < 0) { |
112 | init_failed = true; |
113 | error_report("failed to initialize %s: %s" , |
114 | acc->name, strerror(-ret)); |
115 | } else { |
116 | accel_initialised = true; |
117 | } |
118 | } |
119 | g_strfreev(accel_list); |
120 | |
121 | if (!accel_initialised) { |
122 | if (!init_failed) { |
123 | error_report("-machine accel=%s: No accelerator found" , accel); |
124 | } |
125 | exit(1); |
126 | } |
127 | |
128 | if (init_failed) { |
129 | error_report("Back to %s accelerator" , acc->name); |
130 | } |
131 | } |
132 | |
133 | void accel_setup_post(MachineState *ms) |
134 | { |
135 | AccelState *accel = ms->accelerator; |
136 | AccelClass *acc = ACCEL_GET_CLASS(accel); |
137 | if (acc->setup_post) { |
138 | acc->setup_post(ms, accel); |
139 | } |
140 | } |
141 | |
142 | static void register_accel_types(void) |
143 | { |
144 | type_register_static(&accel_type); |
145 | } |
146 | |
147 | type_init(register_accel_types); |
148 | |