diff options
| -rw-r--r-- | arch_init.c | 5 | ||||
| -rw-r--r-- | arch_init.h | 1 | ||||
| -rw-r--r-- | qemu-config.c | 14 | ||||
| -rw-r--r-- | qemu-options.hx | 10 | ||||
| -rw-r--r-- | vl.c | 102 |
5 files changed, 120 insertions, 12 deletions
diff --git a/arch_init.c b/arch_init.c index 0c09f9118e..484b39d4dd 100644 --- a/arch_init.c +++ b/arch_init.c @@ -709,6 +709,11 @@ int audio_available(void) #endif } +int tcg_available(void) +{ + return 1; +} + int kvm_available(void) { #ifdef CONFIG_KVM diff --git a/arch_init.h b/arch_init.h index 86ebc149bc..2de9f0852d 100644 --- a/arch_init.h +++ b/arch_init.h @@ -27,6 +27,7 @@ void do_smbios_option(const char *optarg); void cpudef_init(void); int audio_available(void); void audio_init(qemu_irq *isa_pic, PCIBus *pci_bus); +int tcg_available(void); int kvm_available(void); int xen_available(void); diff --git a/qemu-config.c b/qemu-config.c index 14d34194d0..5d7ffa2f23 100644 --- a/qemu-config.c +++ b/qemu-config.c @@ -450,6 +450,19 @@ QemuOptsList qemu_option_rom_opts = { }, }; +static QemuOptsList qemu_machine_opts = { + .name = "machine", + .head = QTAILQ_HEAD_INITIALIZER(qemu_machine_opts.head), + .desc = { + { + .name = "accel", + .type = QEMU_OPT_STRING, + .help = "accelerator list", + }, + { /* End of list */ } + }, +}; + static QemuOptsList *vm_config_groups[32] = { &qemu_drive_opts, &qemu_chardev_opts, @@ -464,6 +477,7 @@ static QemuOptsList *vm_config_groups[32] = { &qemu_trace_opts, #endif &qemu_option_rom_opts, + &qemu_machine_opts, NULL, }; diff --git a/qemu-options.hx b/qemu-options.hx index 489df10c46..9f121adcdb 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -2030,6 +2030,16 @@ Enable KVM full virtualization support. This option is only available if KVM support is enabled when compiling. ETEXI +DEF("machine", HAS_ARG, QEMU_OPTION_machine, \ + "-machine accel=accel1[:accel2] use an accelerator (kvm,xen,tcg), default is tcg\n", QEMU_ARCH_ALL) +STEXI +@item -machine accel=@var{accels} +@findex -machine +This is use to enable an accelerator, in kvm,xen,tcg. +By default, it use only tcg. If there a more than one accelerator +specified, the next one is used if the first don't work. +ETEXI + DEF("xen-domid", HAS_ARG, QEMU_OPTION_xen_domid, "-xen-domid id specify xen guest domain id\n", QEMU_ARCH_ALL) DEF("xen-create", 0, QEMU_OPTION_xen_create, @@ -257,6 +257,7 @@ static NotifierList exit_notifiers = static NotifierList machine_init_done_notifiers = NOTIFIER_LIST_INITIALIZER(machine_init_done_notifiers); +static int tcg_allowed = 1; int kvm_allowed = 0; uint32_t xen_domid; enum xen_mode xen_mode = XEN_EMULATE; @@ -1876,6 +1877,82 @@ static int debugcon_parse(const char *devname) return 0; } +static int tcg_init(void) +{ + return 0; +} + +static struct { + const char *opt_name; + const char *name; + int (*available)(void); + int (*init)(void); + int *allowed; +} accel_list[] = { + { "tcg", "tcg", tcg_available, tcg_init, &tcg_allowed }, + { "kvm", "KVM", kvm_available, kvm_init, &kvm_allowed }, +}; + +static int configure_accelerator(void) +{ + const char *p = NULL; + char buf[10]; + int i, ret; + bool accel_initalised = 0; + bool init_failed = 0; + + QemuOptsList *list = qemu_find_opts("machine"); + if (!QTAILQ_EMPTY(&list->head)) { + p = qemu_opt_get(QTAILQ_FIRST(&list->head), "accel"); + } + + if (p == NULL) { + /* Use the default "accelerator", tcg */ + p = "tcg"; + } + + while (!accel_initalised && *p != '\0') { + if (*p == ':') { + p++; + } + p = get_opt_name(buf, sizeof (buf), p, ':'); + for (i = 0; i < ARRAY_SIZE(accel_list); i++) { + if (strcmp(accel_list[i].opt_name, buf) == 0) { + ret = accel_list[i].init(); + if (ret < 0) { + init_failed = 1; + if (!accel_list[i].available()) { + printf("%s not supported for this target\n", + accel_list[i].name); + } else { + fprintf(stderr, "failed to initialize %s: %s\n", + accel_list[i].name, + strerror(-ret)); + } + } else { + accel_initalised = 1; + *(accel_list[i].allowed) = 1; + } + break; + } + } + if (i == ARRAY_SIZE(accel_list)) { + fprintf(stderr, "\"%s\" accelerator does not exist.\n", buf); + } + } + + if (!accel_initalised) { + fprintf(stderr, "No accelerator found!\n"); + exit(1); + } + + if (init_failed) { + fprintf(stderr, "Back to %s accelerator.\n", accel_list[i].name); + } + + return !accel_initalised; +} + void qemu_add_exit_notifier(Notifier *notify) { notifier_list_add(&exit_notifiers, notify); @@ -2576,7 +2653,18 @@ int main(int argc, char **argv, char **envp) do_smbios_option(optarg); break; case QEMU_OPTION_enable_kvm: - kvm_allowed = 1; + olist = qemu_find_opts("machine"); + qemu_opts_reset(olist); + qemu_opts_parse(olist, "accel=kvm", 0); + break; + case QEMU_OPTION_machine: + olist = qemu_find_opts("machine"); + qemu_opts_reset(olist); + opts = qemu_opts_parse(olist, optarg, 0); + if (!opts) { + fprintf(stderr, "parse error: %s\n", optarg); + exit(1); + } break; case QEMU_OPTION_usb: usb_enabled = 1; @@ -2896,17 +2984,7 @@ int main(int argc, char **argv, char **envp) exit(1); } - if (kvm_allowed) { - int ret = kvm_init(); - if (ret < 0) { - if (!kvm_available()) { - printf("KVM not supported for this target\n"); - } else { - fprintf(stderr, "failed to initialize KVM: %s\n", strerror(-ret)); - } - exit(1); - } - } + configure_accelerator(); if (qemu_init_main_loop()) { fprintf(stderr, "qemu_init_main_loop failed\n"); |