hw/core/machine-qmp-cmds.c

   1 /*
   2  * QMP commands related to machines and CPUs
   3  *
   4  * Copyright (C) 2014 Red Hat Inc
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9
  10 #include "qemu/osdep.h"
  11 #include "hw/acpi/vmgenid.h"
  12 #include "hw/boards.h"
  13 #include "hw/intc/intc.h"
  14 #include "hw/mem/memory-device.h"
  15 #include "hw/rdma/rdma.h"
  16 #include "qapi/error.h"
  17 #include "qapi/qapi-builtin-visit.h"
  18 #include "qapi/qapi-commands-machine.h"
  19 #include "qapi/qmp/qobject.h"
  20 #include "qapi/qobject-input-visitor.h"
  21 #include "qapi/type-helpers.h"
  22 #include "qemu/main-loop.h"
  23 #include "qemu/uuid.h"
  24 #include "qom/qom-qobject.h"
  25 #include "sysemu/hostmem.h"
  26 #include "sysemu/hw_accel.h"
  27 #include "sysemu/numa.h"
  28 #include "sysemu/runstate.h"
  29 #include "sysemu/sysemu.h"
  30
  31 static void cpustate_to_cpuinfo_s390(CpuInfoS390 *info, const CPUState *cpu)
  32 {
  33 #ifdef TARGET_S390X
  34     S390CPU *s390_cpu = S390_CPU(cpu);
  35     CPUS390XState *env = &s390_cpu->env;
  36
  37     info->cpu_state = env->cpu_state;
  38 #else
  39     abort();
  40 #endif
  41 }
  42
  43 /*
  44  * fast means: we NEVER interrupt vCPU threads to retrieve
  45  * information from KVM.
  46  */
  47 CpuInfoFastList *qmp_query_cpus_fast(Error **errp)
  48 {
  49     MachineState *ms = MACHINE(qdev_get_machine());
  50     MachineClass *mc = MACHINE_GET_CLASS(ms);
  51     CpuInfoFastList *head = NULL, **tail = &head;
  52     SysEmuTarget target = qapi_enum_parse(&SysEmuTarget_lookup, TARGET_NAME,
  53                                           -1, &error_abort);
  54     CPUState *cpu;
  55
  56     CPU_FOREACH(cpu) {
  57         CpuInfoFast *value = g_malloc0(sizeof(*value));
  58
  59         value->cpu_index = cpu->cpu_index;
  60         value->qom_path = object_get_canonical_path(OBJECT(cpu));
  61         value->thread_id = cpu->thread_id;
  62
  63         if (mc->cpu_index_to_instance_props) {
  64             CpuInstanceProperties *props;
  65             props = g_malloc0(sizeof(*props));
  66             *props = mc->cpu_index_to_instance_props(ms, cpu->cpu_index);
  67             value->props = props;
  68         }
  69
  70         value->target = target;
  71         if (target == SYS_EMU_TARGET_S390X) {
  72             cpustate_to_cpuinfo_s390(&value->u.s390x, cpu);
  73         }
  74
  75         QAPI_LIST_APPEND(tail, value);
  76     }
  77
  78     return head;
  79 }
  80
  81 MachineInfoList *qmp_query_machines(Error **errp)
  82 {
  83     GSList *el, *machines = object_class_get_list(TYPE_MACHINE, false);
  84     MachineInfoList *mach_list = NULL;
  85
  86     for (el = machines; el; el = el->next) {
  87         MachineClass *mc = el->data;
  88         MachineInfo *info;
  89
  90         info = g_malloc0(sizeof(*info));
  91         if (mc->is_default) {
  92             info->has_is_default = true;
  93             info->is_default = true;
  94         }
  95
  96         if (mc->alias) {
  97             info->alias = g_strdup(mc->alias);
  98         }
  99
 100         info->name = g_strdup(mc->name);
 101         info->cpu_max = !mc->max_cpus ? 1 : mc->max_cpus;
 102         info->hotpluggable_cpus = mc->has_hotpluggable_cpus;
 103         info->numa_mem_supported = mc->numa_mem_supported;
 104         info->deprecated = !!mc->deprecation_reason;
 105         info->acpi = !!object_class_property_find(OBJECT_CLASS(mc), "acpi");
 106         if (mc->default_cpu_type) {
 107             info->default_cpu_type = g_strdup(mc->default_cpu_type);
 108         }
 109         if (mc->default_ram_id) {
 110             info->default_ram_id = g_strdup(mc->default_ram_id);
 111         }
 112
 113         QAPI_LIST_PREPEND(mach_list, info);
 114     }
 115
 116     g_slist_free(machines);
 117     return mach_list;
 118 }
 119
 120 CurrentMachineParams *qmp_query_current_machine(Error **errp)
 121 {
 122     CurrentMachineParams *params = g_malloc0(sizeof(*params));
 123     params->wakeup_suspend_support = qemu_wakeup_suspend_enabled();
 124
 125     return params;
 126 }
 127
 128 TargetInfo *qmp_query_target(Error **errp)
 129 {
 130     TargetInfo *info = g_malloc0(sizeof(*info));
 131
 132     info->arch = qapi_enum_parse(&SysEmuTarget_lookup, TARGET_NAME, -1,
 133                                  &error_abort);
 134
 135     return info;
 136 }
 137
 138 HotpluggableCPUList *qmp_query_hotpluggable_cpus(Error **errp)
 139 {
 140     MachineState *ms = MACHINE(qdev_get_machine());
 141     MachineClass *mc = MACHINE_GET_CLASS(ms);
 142
 143     if (!mc->has_hotpluggable_cpus) {
 144         error_setg(errp, "machine does not support hot-plugging CPUs");
 145         return NULL;
 146     }
 147
 148     return machine_query_hotpluggable_cpus(ms);
 149 }
 150
 151 void qmp_set_numa_node(NumaOptions *cmd, Error **errp)
 152 {
 153     if (phase_check(PHASE_MACHINE_INITIALIZED)) {
 154         error_setg(errp, "The command is permitted only before the machine has been created");
 155         return;
 156     }
 157
 158     set_numa_options(MACHINE(qdev_get_machine()), cmd, errp);
 159 }
 160
 161 static int query_memdev(Object *obj, void *opaque)
 162 {
 163     Error *err = NULL;
 164     MemdevList **list = opaque;
 165     Memdev *m;
 166     QObject *host_nodes;
 167     Visitor *v;
 168
 169     if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
 170         m = g_malloc0(sizeof(*m));
 171
 172         m->id = g_strdup(object_get_canonical_path_component(obj));
 173
 174         m->size = object_property_get_uint(obj, "size", &error_abort);
 175         m->merge = object_property_get_bool(obj, "merge", &error_abort);
 176         m->dump = object_property_get_bool(obj, "dump", &error_abort);
 177         m->prealloc = object_property_get_bool(obj, "prealloc", &error_abort);
 178         m->share = object_property_get_bool(obj, "share", &error_abort);
 179         m->reserve = object_property_get_bool(obj, "reserve", &err);
 180         if (err) {
 181             error_free_or_abort(&err);
 182         } else {
 183             m->has_reserve = true;
 184         }
 185         m->policy = object_property_get_enum(obj, "policy", "HostMemPolicy",
 186                                              &error_abort);
 187         host_nodes = object_property_get_qobject(obj,
 188                                                  "host-nodes",
 189                                                  &error_abort);
 190         v = qobject_input_visitor_new(host_nodes);
 191         visit_type_uint16List(v, NULL, &m->host_nodes, &error_abort);
 192         visit_free(v);
 193         qobject_unref(host_nodes);
 194
 195         QAPI_LIST_PREPEND(*list, m);
 196     }
 197
 198     return 0;
 199 }
 200
 201 MemdevList *qmp_query_memdev(Error **errp)
 202 {
 203     Object *obj = object_get_objects_root();
 204     MemdevList *list = NULL;
 205
 206     object_child_foreach(obj, query_memdev, &list);
 207     return list;
 208 }
 209
 210 HumanReadableText *qmp_x_query_numa(Error **errp)
 211 {
 212     g_autoptr(GString) buf = g_string_new("");
 213     int i, nb_numa_nodes;
 214     NumaNodeMem *node_mem;
 215     CpuInfoFastList *cpu_list, *cpu;
 216     MachineState *ms = MACHINE(qdev_get_machine());
 217
 218     nb_numa_nodes = ms->numa_state ? ms->numa_state->num_nodes : 0;
 219     g_string_append_printf(buf, "%d nodes\n", nb_numa_nodes);
 220     if (!nb_numa_nodes) {
 221         goto done;
 222     }
 223
 224     cpu_list = qmp_query_cpus_fast(&error_abort);
 225     node_mem = g_new0(NumaNodeMem, nb_numa_nodes);
 226
 227     query_numa_node_mem(node_mem, ms);
 228     for (i = 0; i < nb_numa_nodes; i++) {
 229         g_string_append_printf(buf, "node %d cpus:", i);
 230         for (cpu = cpu_list; cpu; cpu = cpu->next) {
 231             if (cpu->value->props && cpu->value->props->has_node_id &&
 232                 cpu->value->props->node_id == i) {
 233                 g_string_append_printf(buf, " %" PRIi64, cpu->value->cpu_index);
 234             }
 235         }
 236         g_string_append_printf(buf, "\n");
 237         g_string_append_printf(buf, "node %d size: %" PRId64 " MB\n", i,
 238                                node_mem[i].node_mem >> 20);
 239         g_string_append_printf(buf, "node %d plugged: %" PRId64 " MB\n", i,
 240                                node_mem[i].node_plugged_mem >> 20);
 241     }
 242     qapi_free_CpuInfoFastList(cpu_list);
 243     g_free(node_mem);
 244
 245  done:
 246     return human_readable_text_from_str(buf);
 247 }
 248
 249 KvmInfo *qmp_query_kvm(Error **errp)
 250 {
 251     KvmInfo *info = g_malloc0(sizeof(*info));
 252
 253     info->enabled = kvm_enabled();
 254     info->present = accel_find("kvm");
 255
 256     return info;
 257 }
 258
 259 UuidInfo *qmp_query_uuid(Error **errp)
 260 {
 261     UuidInfo *info = g_malloc0(sizeof(*info));
 262
 263     info->UUID = qemu_uuid_unparse_strdup(&qemu_uuid);
 264     return info;
 265 }
 266
 267 void qmp_system_reset(Error **errp)
 268 {
 269     qemu_system_reset_request(SHUTDOWN_CAUSE_HOST_QMP_SYSTEM_RESET);
 270 }
 271
 272 void qmp_system_powerdown(Error **errp)
 273 {
 274     qemu_system_powerdown_request();
 275 }
 276
 277 void qmp_system_wakeup(Error **errp)
 278 {
 279     if (!qemu_wakeup_suspend_enabled()) {
 280         error_setg(errp,
 281                    "wake-up from suspend is not supported by this guest");
 282         return;
 283     }
 284
 285     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, errp);
 286 }
 287
 288 MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
 289 {
 290     return qmp_memory_device_list();
 291 }
 292
 293 MemoryInfo *qmp_query_memory_size_summary(Error **errp)
 294 {
 295     MemoryInfo *mem_info = g_new0(MemoryInfo, 1);
 296     MachineState *ms = MACHINE(qdev_get_machine());
 297
 298     mem_info->base_memory = ms->ram_size;
 299
 300     mem_info->plugged_memory = get_plugged_memory_size();
 301     mem_info->has_plugged_memory =
 302         mem_info->plugged_memory != (uint64_t)-1;
 303
 304     return mem_info;
 305 }
 306
 307 static int qmp_x_query_rdma_foreach(Object *obj, void *opaque)
 308 {
 309     RdmaProvider *rdma;
 310     RdmaProviderClass *k;
 311     GString *buf = opaque;
 312
 313     if (object_dynamic_cast(obj, INTERFACE_RDMA_PROVIDER)) {
 314         rdma = RDMA_PROVIDER(obj);
 315         k = RDMA_PROVIDER_GET_CLASS(obj);
 316         if (k->format_statistics) {
 317             k->format_statistics(rdma, buf);
 318         } else {
 319             g_string_append_printf(buf,
 320                                    "RDMA statistics not available for %s.\n",
 321                                    object_get_typename(obj));
 322         }
 323     }
 324
 325     return 0;
 326 }
 327
 328 HumanReadableText *qmp_x_query_rdma(Error **errp)
 329 {
 330     g_autoptr(GString) buf = g_string_new("");
 331
 332     object_child_foreach_recursive(object_get_root(),
 333                                    qmp_x_query_rdma_foreach, buf);
 334
 335     return human_readable_text_from_str(buf);
 336 }
 337
 338 HumanReadableText *qmp_x_query_ramblock(Error **errp)
 339 {
 340     g_autoptr(GString) buf = ram_block_format();
 341
 342     return human_readable_text_from_str(buf);
 343 }
 344
 345 static int qmp_x_query_irq_foreach(Object *obj, void *opaque)
 346 {
 347     InterruptStatsProvider *intc;
 348     InterruptStatsProviderClass *k;
 349     GString *buf = opaque;
 350
 351     if (object_dynamic_cast(obj, TYPE_INTERRUPT_STATS_PROVIDER)) {
 352         intc = INTERRUPT_STATS_PROVIDER(obj);
 353         k = INTERRUPT_STATS_PROVIDER_GET_CLASS(obj);
 354         uint64_t *irq_counts;
 355         unsigned int nb_irqs, i;
 356         if (k->get_statistics &&
 357             k->get_statistics(intc, &irq_counts, &nb_irqs)) {
 358             if (nb_irqs > 0) {
 359                 g_string_append_printf(buf, "IRQ statistics for %s:\n",
 360                                        object_get_typename(obj));
 361                 for (i = 0; i < nb_irqs; i++) {
 362                     if (irq_counts[i] > 0) {
 363                         g_string_append_printf(buf, "%2d: %" PRId64 "\n", i,
 364                                                irq_counts[i]);
 365                     }
 366                 }
 367             }
 368         } else {
 369             g_string_append_printf(buf,
 370                                    "IRQ statistics not available for %s.\n",
 371                                    object_get_typename(obj));
 372         }
 373     }
 374
 375     return 0;
 376 }
 377
 378 HumanReadableText *qmp_x_query_irq(Error **errp)
 379 {
 380     g_autoptr(GString) buf = g_string_new("");
 381
 382     object_child_foreach_recursive(object_get_root(),
 383                                    qmp_x_query_irq_foreach, buf);
 384
 385     return human_readable_text_from_str(buf);
 386 }
 387
 388 GuidInfo *qmp_query_vm_generation_id(Error **errp)
 389 {
 390     GuidInfo *info;
 391     VmGenIdState *vms;
 392     Object *obj = find_vmgenid_dev();
 393
 394     if (!obj) {
 395         error_setg(errp, "VM Generation ID device not found");
 396         return NULL;
 397     }
 398     vms = VMGENID(obj);
 399
 400     info = g_malloc0(sizeof(*info));
 401     info->guid = qemu_uuid_unparse_strdup(&vms->guid);
 402     return info;
 403 }