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 "hw/core/cpu.h" 30 #include "accel/accel-ops.h" 31 #include "accel/accel-cpu-ops.h" 32 #include "system/cpus.h" 33 #include "qemu/error-report.h" 34 #include "accel-internal.h" 35 36 int accel_init_machine(AccelState *accel, MachineState *ms) 37 { 38 AccelClass *acc = ACCEL_GET_CLASS(accel); 39 int ret; 40 ms->accelerator = accel; 41 *(acc->allowed) = true; 42 ret = acc->init_machine(accel, ms); 43 if (ret < 0) { 44 ms->accelerator = NULL; 45 *(acc->allowed) = false; 46 object_unref(OBJECT(accel)); 47 } else { 48 object_set_accelerator_compat_props(acc->compat_props); 49 } 50 return ret; 51 } 52 53 AccelState *current_accel(void) 54 { 55 return current_machine->accelerator; 56 } 57 58 void accel_setup_post(MachineState *ms) 59 { 60 AccelState *accel = ms->accelerator; 61 AccelClass *acc = ACCEL_GET_CLASS(accel); 62 if (acc->setup_post) { 63 acc->setup_post(accel); 64 } 65 } 66 67 void accel_pre_resume(MachineState *ms, bool step_pending) 68 { 69 AccelState *accel = ms->accelerator; 70 AccelClass *acc = ACCEL_GET_CLASS(accel); 71 if (acc->pre_resume_vm) { 72 acc->pre_resume_vm(accel, step_pending); 73 } 74 } 75 76 /* initialize the arch-independent accel operation interfaces */ 77 void accel_init_ops_interfaces(AccelClass *ac) 78 { 79 const char *ac_name; 80 char *ops_name; 81 ObjectClass *oc; 82 AccelOpsClass *ops; 83 84 ac_name = object_class_get_name(OBJECT_CLASS(ac)); 85 g_assert(ac_name != NULL); 86 87 ops_name = g_strdup_printf("%s" ACCEL_OPS_SUFFIX, ac_name); 88 oc = module_object_class_by_name(ops_name); 89 if (!oc) { 90 error_report("fatal: could not load module for type '%s'", ops_name); 91 exit(1); 92 } 93 g_free(ops_name); 94 /* 95 * all accelerators need to define ops, providing at least a mandatory 96 * non-NULL create_vcpu_thread operation. 97 */ 98 ops = ACCEL_OPS_CLASS(oc); 99 ac->ops = ops; 100 if (ops->ops_init) { 101 ops->ops_init(ac); 102 } 103 cpus_register_accel(ops); 104 } 105 106 static const TypeInfo accel_ops_type_info = { 107 .name = TYPE_ACCEL_OPS, 108 .parent = TYPE_OBJECT, 109 .abstract = true, 110 .class_size = sizeof(AccelOpsClass), 111 }; 112 113 static void accel_system_register_types(void) 114 { 115 type_register_static(&accel_ops_type_info); 116 } 117 type_init(accel_system_register_types); 118