| /* |
| * QEMU System Emulator, accelerator interfaces |
| * |
| * Copyright (c) 2003-2008 Fabrice Bellard |
| * Copyright (c) 2014 Red Hat Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "sysemu/accel.h" |
| #include "hw/boards.h" |
| #include "sysemu/arch_init.h" |
| #include "sysemu/sysemu.h" |
| #include "sysemu/kvm.h" |
| #include "sysemu/qtest.h" |
| #include "hw/xen/xen.h" |
| #include "qom/object.h" |
| #include "qemu/error-report.h" |
| #include "qemu/option.h" |
| #include "qapi/error.h" |
| |
| static const TypeInfo accel_type = { |
| .name = TYPE_ACCEL, |
| .parent = TYPE_OBJECT, |
| .class_size = sizeof(AccelClass), |
| .instance_size = sizeof(AccelState), |
| }; |
| |
| /* Lookup AccelClass from opt_name. Returns NULL if not found */ |
| static AccelClass *accel_find(const char *opt_name) |
| { |
| char *class_name = g_strdup_printf(ACCEL_CLASS_NAME("%s"), opt_name); |
| AccelClass *ac = ACCEL_CLASS(object_class_by_name(class_name)); |
| g_free(class_name); |
| return ac; |
| } |
| |
| static int accel_init_machine(AccelClass *acc, MachineState *ms) |
| { |
| ObjectClass *oc = OBJECT_CLASS(acc); |
| const char *cname = object_class_get_name(oc); |
| AccelState *accel = ACCEL(object_new(cname)); |
| int ret; |
| ms->accelerator = accel; |
| *(acc->allowed) = true; |
| ret = acc->init_machine(ms); |
| if (ret < 0) { |
| ms->accelerator = NULL; |
| *(acc->allowed) = false; |
| object_unref(OBJECT(accel)); |
| } |
| return ret; |
| } |
| |
| void configure_accelerator(MachineState *ms, const char *progname) |
| { |
| const char *accel; |
| char **accel_list, **tmp; |
| int ret; |
| bool accel_initialised = false; |
| bool init_failed = false; |
| AccelClass *acc = NULL; |
| |
| accel = qemu_opt_get(qemu_get_machine_opts(), "accel"); |
| if (accel == NULL) { |
| /* Select the default accelerator */ |
| int pnlen = strlen(progname); |
| if (pnlen >= 3 && g_str_equal(&progname[pnlen - 3], "kvm")) { |
| /* If the program name ends with "kvm", we prefer KVM */ |
| accel = "kvm:tcg"; |
| } else { |
| #if defined(CONFIG_TCG) |
| accel = "tcg"; |
| #elif defined(CONFIG_KVM) |
| accel = "kvm"; |
| #else |
| #error "No default accelerator available" |
| #endif |
| } |
| } |
| |
| accel_list = g_strsplit(accel, ":", 0); |
| |
| for (tmp = accel_list; !accel_initialised && tmp && *tmp; tmp++) { |
| acc = accel_find(*tmp); |
| if (!acc) { |
| continue; |
| } |
| if (acc->available && !acc->available()) { |
| printf("%s not supported for this target\n", |
| acc->name); |
| continue; |
| } |
| ret = accel_init_machine(acc, ms); |
| if (ret < 0) { |
| init_failed = true; |
| error_report("failed to initialize %s: %s", |
| acc->name, strerror(-ret)); |
| } else { |
| accel_initialised = true; |
| } |
| } |
| g_strfreev(accel_list); |
| |
| if (!accel_initialised) { |
| if (!init_failed) { |
| error_report("-machine accel=%s: No accelerator found", accel); |
| } |
| exit(1); |
| } |
| |
| if (init_failed) { |
| error_report("Back to %s accelerator", acc->name); |
| } |
| } |
| |
| void accel_setup_post(MachineState *ms) |
| { |
| AccelState *accel = ms->accelerator; |
| AccelClass *acc = ACCEL_GET_CLASS(accel); |
| if (acc->setup_post) { |
| acc->setup_post(ms, accel); |
| } |
| } |
| |
| static void register_accel_types(void) |
| { |
| type_register_static(&accel_type); |
| } |
| |
| type_init(register_accel_types); |