machine-qmp-cmds.c (7519B)
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/boards.h" 12 #include "qapi/error.h" 13 #include "qapi/qapi-builtin-visit.h" 14 #include "qapi/qapi-commands-machine.h" 15 #include "qapi/qmp/qerror.h" 16 #include "qapi/qmp/qobject.h" 17 #include "qapi/qobject-input-visitor.h" 18 #include "qapi/type-helpers.h" 19 #include "qemu/main-loop.h" 20 #include "qom/qom-qobject.h" 21 #include "sysemu/hostmem.h" 22 #include "sysemu/hw_accel.h" 23 #include "sysemu/numa.h" 24 #include "sysemu/runstate.h" 25 26 static void cpustate_to_cpuinfo_s390(CpuInfoS390 *info, const CPUState *cpu) 27 { 28 #ifdef TARGET_S390X 29 S390CPU *s390_cpu = S390_CPU(cpu); 30 CPUS390XState *env = &s390_cpu->env; 31 32 info->cpu_state = env->cpu_state; 33 #else 34 abort(); 35 #endif 36 } 37 38 /* 39 * fast means: we NEVER interrupt vCPU threads to retrieve 40 * information from KVM. 41 */ 42 CpuInfoFastList *qmp_query_cpus_fast(Error **errp) 43 { 44 MachineState *ms = MACHINE(qdev_get_machine()); 45 MachineClass *mc = MACHINE_GET_CLASS(ms); 46 CpuInfoFastList *head = NULL, **tail = &head; 47 SysEmuTarget target = qapi_enum_parse(&SysEmuTarget_lookup, TARGET_NAME, 48 -1, &error_abort); 49 CPUState *cpu; 50 51 CPU_FOREACH(cpu) { 52 CpuInfoFast *value = g_malloc0(sizeof(*value)); 53 54 value->cpu_index = cpu->cpu_index; 55 value->qom_path = object_get_canonical_path(OBJECT(cpu)); 56 value->thread_id = cpu->thread_id; 57 58 value->has_props = !!mc->cpu_index_to_instance_props; 59 if (value->has_props) { 60 CpuInstanceProperties *props; 61 props = g_malloc0(sizeof(*props)); 62 *props = mc->cpu_index_to_instance_props(ms, cpu->cpu_index); 63 value->props = props; 64 } 65 66 value->target = target; 67 if (target == SYS_EMU_TARGET_S390X) { 68 cpustate_to_cpuinfo_s390(&value->u.s390x, cpu); 69 } 70 71 QAPI_LIST_APPEND(tail, value); 72 } 73 74 return head; 75 } 76 77 MachineInfoList *qmp_query_machines(Error **errp) 78 { 79 GSList *el, *machines = object_class_get_list(TYPE_MACHINE, false); 80 MachineInfoList *mach_list = NULL; 81 82 for (el = machines; el; el = el->next) { 83 MachineClass *mc = el->data; 84 MachineInfo *info; 85 86 info = g_malloc0(sizeof(*info)); 87 if (mc->is_default) { 88 info->has_is_default = true; 89 info->is_default = true; 90 } 91 92 if (mc->alias) { 93 info->has_alias = true; 94 info->alias = g_strdup(mc->alias); 95 } 96 97 info->name = g_strdup(mc->name); 98 info->cpu_max = !mc->max_cpus ? 1 : mc->max_cpus; 99 info->hotpluggable_cpus = mc->has_hotpluggable_cpus; 100 info->numa_mem_supported = mc->numa_mem_supported; 101 info->deprecated = !!mc->deprecation_reason; 102 if (mc->default_cpu_type) { 103 info->default_cpu_type = g_strdup(mc->default_cpu_type); 104 info->has_default_cpu_type = true; 105 } 106 if (mc->default_ram_id) { 107 info->default_ram_id = g_strdup(mc->default_ram_id); 108 info->has_default_ram_id = true; 109 } 110 111 QAPI_LIST_PREPEND(mach_list, info); 112 } 113 114 g_slist_free(machines); 115 return mach_list; 116 } 117 118 CurrentMachineParams *qmp_query_current_machine(Error **errp) 119 { 120 CurrentMachineParams *params = g_malloc0(sizeof(*params)); 121 params->wakeup_suspend_support = qemu_wakeup_suspend_enabled(); 122 123 return params; 124 } 125 126 TargetInfo *qmp_query_target(Error **errp) 127 { 128 TargetInfo *info = g_malloc0(sizeof(*info)); 129 130 info->arch = qapi_enum_parse(&SysEmuTarget_lookup, TARGET_NAME, -1, 131 &error_abort); 132 133 return info; 134 } 135 136 HotpluggableCPUList *qmp_query_hotpluggable_cpus(Error **errp) 137 { 138 MachineState *ms = MACHINE(qdev_get_machine()); 139 MachineClass *mc = MACHINE_GET_CLASS(ms); 140 141 if (!mc->has_hotpluggable_cpus) { 142 error_setg(errp, QERR_FEATURE_DISABLED, "query-hotpluggable-cpus"); 143 return NULL; 144 } 145 146 return machine_query_hotpluggable_cpus(ms); 147 } 148 149 void qmp_set_numa_node(NumaOptions *cmd, Error **errp) 150 { 151 if (phase_check(PHASE_MACHINE_INITIALIZED)) { 152 error_setg(errp, "The command is permitted only before the machine has been created"); 153 return; 154 } 155 156 set_numa_options(MACHINE(qdev_get_machine()), cmd, errp); 157 } 158 159 static int query_memdev(Object *obj, void *opaque) 160 { 161 Error *err = NULL; 162 MemdevList **list = opaque; 163 Memdev *m; 164 QObject *host_nodes; 165 Visitor *v; 166 167 if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) { 168 m = g_malloc0(sizeof(*m)); 169 170 m->id = g_strdup(object_get_canonical_path_component(obj)); 171 m->has_id = !!m->id; 172 173 m->size = object_property_get_uint(obj, "size", &error_abort); 174 m->merge = object_property_get_bool(obj, "merge", &error_abort); 175 m->dump = object_property_get_bool(obj, "dump", &error_abort); 176 m->prealloc = object_property_get_bool(obj, "prealloc", &error_abort); 177 m->share = object_property_get_bool(obj, "share", &error_abort); 178 m->reserve = object_property_get_bool(obj, "reserve", &err); 179 if (err) { 180 error_free_or_abort(&err); 181 } else { 182 m->has_reserve = true; 183 } 184 m->policy = object_property_get_enum(obj, "policy", "HostMemPolicy", 185 &error_abort); 186 host_nodes = object_property_get_qobject(obj, 187 "host-nodes", 188 &error_abort); 189 v = qobject_input_visitor_new(host_nodes); 190 visit_type_uint16List(v, NULL, &m->host_nodes, &error_abort); 191 visit_free(v); 192 qobject_unref(host_nodes); 193 194 QAPI_LIST_PREPEND(*list, m); 195 } 196 197 return 0; 198 } 199 200 MemdevList *qmp_query_memdev(Error **errp) 201 { 202 Object *obj = object_get_objects_root(); 203 MemdevList *list = NULL; 204 205 object_child_foreach(obj, query_memdev, &list); 206 return list; 207 } 208 209 HumanReadableText *qmp_x_query_numa(Error **errp) 210 { 211 g_autoptr(GString) buf = g_string_new(""); 212 int i, nb_numa_nodes; 213 NumaNodeMem *node_mem; 214 CpuInfoFastList *cpu_list, *cpu; 215 MachineState *ms = MACHINE(qdev_get_machine()); 216 217 nb_numa_nodes = ms->numa_state ? ms->numa_state->num_nodes : 0; 218 g_string_append_printf(buf, "%d nodes\n", nb_numa_nodes); 219 if (!nb_numa_nodes) { 220 goto done; 221 } 222 223 cpu_list = qmp_query_cpus_fast(&error_abort); 224 node_mem = g_new0(NumaNodeMem, nb_numa_nodes); 225 226 query_numa_node_mem(node_mem, ms); 227 for (i = 0; i < nb_numa_nodes; i++) { 228 g_string_append_printf(buf, "node %d cpus:", i); 229 for (cpu = cpu_list; cpu; cpu = cpu->next) { 230 if (cpu->value->has_props && cpu->value->props->has_node_id && 231 cpu->value->props->node_id == i) { 232 g_string_append_printf(buf, " %" PRIi64, cpu->value->cpu_index); 233 } 234 } 235 g_string_append_printf(buf, "\n"); 236 g_string_append_printf(buf, "node %d size: %" PRId64 " MB\n", i, 237 node_mem[i].node_mem >> 20); 238 g_string_append_printf(buf, "node %d plugged: %" PRId64 " MB\n", i, 239 node_mem[i].node_plugged_mem >> 20); 240 } 241 qapi_free_CpuInfoFastList(cpu_list); 242 g_free(node_mem); 243 244 done: 245 return human_readable_text_from_str(buf); 246 }