2 * QEMU System Emulator, accelerator interfaces
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2014 Red Hat Inc.
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:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
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
26 #include "sysemu/accel.h"
27 #include "qemu-common.h"
28 #include "sysemu/arch_init.h"
29 #include "sysemu/sysemu.h"
30 #include "sysemu/kvm.h"
31 #include "sysemu/qtest.h"
32 #include "hw/xen/xen.h"
33 #include "qom/object.h"
36 static bool tcg_allowed = true;
38 static int tcg_init(MachineClass *mc)
40 tcg_exec_init(tcg_tb_size * 1024 * 1024);
44 static const TypeInfo accel_type = {
46 .parent = TYPE_OBJECT,
47 .class_size = sizeof(AccelClass),
48 .instance_size = sizeof(AccelState),
51 /* Lookup AccelClass from opt_name. Returns NULL if not found */
52 static AccelClass *accel_find(const char *opt_name)
54 char *class_name = g_strdup_printf(ACCEL_CLASS_NAME("%s"), opt_name);
55 AccelClass *ac = ACCEL_CLASS(object_class_by_name(class_name));
60 int configure_accelerator(MachineClass *mc)
65 bool accel_initialised = false;
66 bool init_failed = false;
67 AccelClass *acc = NULL;
69 p = qemu_opt_get(qemu_get_machine_opts(), "accel");
71 /* Use the default "accelerator", tcg */
75 while (!accel_initialised && *p != '\0') {
79 p = get_opt_name(buf, sizeof(buf), p, ':');
80 acc = accel_find(buf);
82 fprintf(stderr, "\"%s\" accelerator not found.\n", buf);
85 if (acc->available && !acc->available()) {
86 printf("%s not supported for this target\n",
90 *(acc->allowed) = true;
94 fprintf(stderr, "failed to initialize %s: %s\n",
97 *(acc->allowed) = false;
99 accel_initialised = true;
103 if (!accel_initialised) {
105 fprintf(stderr, "No accelerator found!\n");
111 fprintf(stderr, "Back to %s accelerator.\n", acc->name);
114 return !accel_initialised;
118 static void tcg_accel_class_init(ObjectClass *oc, void *data)
120 AccelClass *ac = ACCEL_CLASS(oc);
122 ac->available = tcg_available;
124 ac->allowed = &tcg_allowed;
127 #define TYPE_TCG_ACCEL ACCEL_CLASS_NAME("tcg")
129 static const TypeInfo tcg_accel_type = {
130 .name = TYPE_TCG_ACCEL,
131 .parent = TYPE_ACCEL,
132 .class_init = tcg_accel_class_init,
135 static void register_accel_types(void)
137 type_register_static(&accel_type);
138 type_register_static(&tcg_accel_type);
141 type_init(register_accel_types);