target/arm/monitor.c

   1 /*
   2  * QEMU monitor.c for ARM.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  20  * THE SOFTWARE.
  21  */
  22
  23 #include "qemu/osdep.h"
  24 #include "hw/boards.h"
  25 #include "kvm_arm.h"
  26 #include "qapi/error.h"
  27 #include "qapi/visitor.h"
  28 #include "qapi/qobject-input-visitor.h"
  29 #include "qapi/qapi-commands-machine-target.h"
  30 #include "qapi/qapi-commands-misc-target.h"
  31 #include "qapi/qmp/qerror.h"
  32 #include "qapi/qmp/qdict.h"
  33 #include "qom/qom-qobject.h"
  34
  35 static GICCapability *gic_cap_new(int version)
  36 {
  37     GICCapability *cap = g_new0(GICCapability, 1);
  38     cap->version = version;
  39     /* by default, support none */
  40     cap->emulated = false;
  41     cap->kernel = false;
  42     return cap;
  43 }
  44
  45 static inline void gic_cap_kvm_probe(GICCapability *v2, GICCapability *v3)
  46 {
  47 #ifdef CONFIG_KVM
  48     int fdarray[3];
  49
  50     if (!kvm_arm_create_scratch_host_vcpu(NULL, fdarray, NULL)) {
  51         return;
  52     }
  53
  54     /* Test KVM GICv2 */
  55     if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V2)) {
  56         v2->kernel = true;
  57     }
  58
  59     /* Test KVM GICv3 */
  60     if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V3)) {
  61         v3->kernel = true;
  62     }
  63
  64     kvm_arm_destroy_scratch_host_vcpu(fdarray);
  65 #endif
  66 }
  67
  68 GICCapabilityList *qmp_query_gic_capabilities(Error **errp)
  69 {
  70     GICCapabilityList *head = NULL;
  71     GICCapability *v2 = gic_cap_new(2), *v3 = gic_cap_new(3);
  72
  73     v2->emulated = true;
  74     v3->emulated = true;
  75
  76     gic_cap_kvm_probe(v2, v3);
  77
  78     QAPI_LIST_PREPEND(head, v2);
  79     QAPI_LIST_PREPEND(head, v3);
  80
  81     return head;
  82 }
  83
  84 QEMU_BUILD_BUG_ON(ARM_MAX_VQ > 16);
  85
  86 /*
  87  * These are cpu model features we want to advertise. The order here
  88  * matters as this is the order in which qmp_query_cpu_model_expansion
  89  * will attempt to set them. If there are dependencies between features,
  90  * then the order that considers those dependencies must be used.
  91  */
  92 static const char *cpu_model_advertised_features[] = {
  93     "aarch64", "pmu", "sve",
  94     "sve128", "sve256", "sve384", "sve512",
  95     "sve640", "sve768", "sve896", "sve1024", "sve1152", "sve1280",
  96     "sve1408", "sve1536", "sve1664", "sve1792", "sve1920", "sve2048",
  97     "kvm-no-adjvtime", "kvm-steal-time",
  98     NULL
  99 };
 100
 101 CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
 102                                                      CpuModelInfo *model,
 103                                                      Error **errp)
 104 {
 105     CpuModelExpansionInfo *expansion_info;
 106     const QDict *qdict_in = NULL;
 107     QDict *qdict_out;
 108     ObjectClass *oc;
 109     Object *obj;
 110     const char *name;
 111     int i;
 112
 113     if (type != CPU_MODEL_EXPANSION_TYPE_FULL) {
 114         error_setg(errp, "The requested expansion type is not supported");
 115         return NULL;
 116     }
 117
 118     if (!kvm_enabled() && !strcmp(model->name, "host")) {
 119         error_setg(errp, "The CPU type '%s' requires KVM", model->name);
 120         return NULL;
 121     }
 122
 123     oc = cpu_class_by_name(TYPE_ARM_CPU, model->name);
 124     if (!oc) {
 125         error_setg(errp, "The CPU type '%s' is not a recognized ARM CPU type",
 126                    model->name);
 127         return NULL;
 128     }
 129
 130     if (kvm_enabled()) {
 131         bool supported = false;
 132
 133         if (!strcmp(model->name, "host") || !strcmp(model->name, "max")) {
 134             /* These are kvmarm's recommended cpu types */
 135             supported = true;
 136         } else if (current_machine->cpu_type) {
 137             const char *cpu_type = current_machine->cpu_type;
 138             int len = strlen(cpu_type) - strlen(ARM_CPU_TYPE_SUFFIX);
 139
 140             if (strlen(model->name) == len &&
 141                 !strncmp(model->name, cpu_type, len)) {
 142                 /* KVM is enabled and we're using this type, so it works. */
 143                 supported = true;
 144             }
 145         }
 146         if (!supported) {
 147             error_setg(errp, "We cannot guarantee the CPU type '%s' works "
 148                              "with KVM on this host", model->name);
 149             return NULL;
 150         }
 151     }
 152
 153     if (model->props) {
 154         qdict_in = qobject_to(QDict, model->props);
 155         if (!qdict_in) {
 156             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 157             return NULL;
 158         }
 159     }
 160
 161     obj = object_new(object_class_get_name(oc));
 162
 163     if (qdict_in) {
 164         Visitor *visitor;
 165         Error *err = NULL;
 166
 167         visitor = qobject_input_visitor_new(model->props);
 168         if (!visit_start_struct(visitor, NULL, NULL, 0, errp)) {
 169             visit_free(visitor);
 170             object_unref(obj);
 171             return NULL;
 172         }
 173
 174         i = 0;
 175         while ((name = cpu_model_advertised_features[i++]) != NULL) {
 176             if (qdict_get(qdict_in, name)) {
 177                 if (!object_property_set(obj, name, visitor, &err)) {
 178                     break;
 179                 }
 180             }
 181         }
 182
 183         if (!err) {
 184             visit_check_struct(visitor, &err);
 185         }
 186         if (!err) {
 187             arm_cpu_finalize_features(ARM_CPU(obj), &err);
 188         }
 189         visit_end_struct(visitor, NULL);
 190         visit_free(visitor);
 191         if (err) {
 192             object_unref(obj);
 193             error_propagate(errp, err);
 194             return NULL;
 195         }
 196     } else {
 197         arm_cpu_finalize_features(ARM_CPU(obj), &error_abort);
 198     }
 199
 200     expansion_info = g_new0(CpuModelExpansionInfo, 1);
 201     expansion_info->model = g_malloc0(sizeof(*expansion_info->model));
 202     expansion_info->model->name = g_strdup(model->name);
 203
 204     qdict_out = qdict_new();
 205
 206     i = 0;
 207     while ((name = cpu_model_advertised_features[i++]) != NULL) {
 208         ObjectProperty *prop = object_property_find(obj, name);
 209         if (prop) {
 210             QObject *value;
 211
 212             assert(prop->get);
 213             value = object_property_get_qobject(obj, name, &error_abort);
 214
 215             qdict_put_obj(qdict_out, name, value);
 216         }
 217     }
 218
 219     if (!qdict_size(qdict_out)) {
 220         qobject_unref(qdict_out);
 221     } else {
 222         expansion_info->model->props = QOBJECT(qdict_out);
 223         expansion_info->model->has_props = true;
 224     }
 225
 226     object_unref(obj);
 227
 228     return expansion_info;
 229 }