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 GICCapabilityList *gic_cap_list_add(GICCapabilityList *head,
  46                                            GICCapability *cap)
  47 {
  48     GICCapabilityList *item = g_new0(GICCapabilityList, 1);
  49     item->value = cap;
  50     item->next = head;
  51     return item;
  52 }
  53
  54 static inline void gic_cap_kvm_probe(GICCapability *v2, GICCapability *v3)
  55 {
  56 #ifdef CONFIG_KVM
  57     int fdarray[3];
  58
  59     if (!kvm_arm_create_scratch_host_vcpu(NULL, fdarray, NULL)) {
  60         return;
  61     }
  62
  63     /* Test KVM GICv2 */
  64     if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V2)) {
  65         v2->kernel = true;
  66     }
  67
  68     /* Test KVM GICv3 */
  69     if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V3)) {
  70         v3->kernel = true;
  71     }
  72
  73     kvm_arm_destroy_scratch_host_vcpu(fdarray);
  74 #endif
  75 }
  76
  77 GICCapabilityList *qmp_query_gic_capabilities(Error **errp)
  78 {
  79     GICCapabilityList *head = NULL;
  80     GICCapability *v2 = gic_cap_new(2), *v3 = gic_cap_new(3);
  81
  82     v2->emulated = true;
  83     v3->emulated = true;
  84
  85     gic_cap_kvm_probe(v2, v3);
  86
  87     head = gic_cap_list_add(head, v2);
  88     head = gic_cap_list_add(head, v3);
  89
  90     return head;
  91 }
  92
  93 QEMU_BUILD_BUG_ON(ARM_MAX_VQ > 16);
  94
  95 /*
  96  * These are cpu model features we want to advertise. The order here
  97  * matters as this is the order in which qmp_query_cpu_model_expansion
  98  * will attempt to set them. If there are dependencies between features,
  99  * then the order that considers those dependencies must be used.
 100  */
 101 static const char *cpu_model_advertised_features[] = {
 102     "aarch64", "pmu", "sve",
 103     "sve128", "sve256", "sve384", "sve512",
 104     "sve640", "sve768", "sve896", "sve1024", "sve1152", "sve1280",
 105     "sve1408", "sve1536", "sve1664", "sve1792", "sve1920", "sve2048",
 106     "kvm-no-adjvtime",
 107     NULL
 108 };
 109
 110 CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
 111                                                      CpuModelInfo *model,
 112                                                      Error **errp)
 113 {
 114     CpuModelExpansionInfo *expansion_info;
 115     const QDict *qdict_in = NULL;
 116     QDict *qdict_out;
 117     ObjectClass *oc;
 118     Object *obj;
 119     const char *name;
 120     int i;
 121
 122     if (type != CPU_MODEL_EXPANSION_TYPE_FULL) {
 123         error_setg(errp, "The requested expansion type is not supported");
 124         return NULL;
 125     }
 126
 127     if (!kvm_enabled() && !strcmp(model->name, "host")) {
 128         error_setg(errp, "The CPU type '%s' requires KVM", model->name);
 129         return NULL;
 130     }
 131
 132     oc = cpu_class_by_name(TYPE_ARM_CPU, model->name);
 133     if (!oc) {
 134         error_setg(errp, "The CPU type '%s' is not a recognized ARM CPU type",
 135                    model->name);
 136         return NULL;
 137     }
 138
 139     if (kvm_enabled()) {
 140         bool supported = false;
 141
 142         if (!strcmp(model->name, "host") || !strcmp(model->name, "max")) {
 143             /* These are kvmarm's recommended cpu types */
 144             supported = true;
 145         } else if (current_machine->cpu_type) {
 146             const char *cpu_type = current_machine->cpu_type;
 147             int len = strlen(cpu_type) - strlen(ARM_CPU_TYPE_SUFFIX);
 148
 149             if (strlen(model->name) == len &&
 150                 !strncmp(model->name, cpu_type, len)) {
 151                 /* KVM is enabled and we're using this type, so it works. */
 152                 supported = true;
 153             }
 154         }
 155         if (!supported) {
 156             error_setg(errp, "We cannot guarantee the CPU type '%s' works "
 157                              "with KVM on this host", model->name);
 158             return NULL;
 159         }
 160     }
 161
 162     if (model->props) {
 163         qdict_in = qobject_to(QDict, model->props);
 164         if (!qdict_in) {
 165             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 166             return NULL;
 167         }
 168     }
 169
 170     obj = object_new(object_class_get_name(oc));
 171
 172     if (qdict_in) {
 173         Visitor *visitor;
 174         Error *err = NULL;
 175
 176         visitor = qobject_input_visitor_new(model->props);
 177         visit_start_struct(visitor, NULL, NULL, 0, &err);
 178         if (err) {
 179             visit_free(visitor);
 180             object_unref(obj);
 181             error_propagate(errp, err);
 182             return NULL;
 183         }
 184
 185         i = 0;
 186         while ((name = cpu_model_advertised_features[i++]) != NULL) {
 187             if (qdict_get(qdict_in, name)) {
 188                 object_property_set(obj, visitor, name, &err);
 189                 if (err) {
 190                     break;
 191                 }
 192             }
 193         }
 194
 195         if (!err) {
 196             visit_check_struct(visitor, &err);
 197         }
 198         if (!err) {
 199             arm_cpu_finalize_features(ARM_CPU(obj), &err);
 200         }
 201         visit_end_struct(visitor, NULL);
 202         visit_free(visitor);
 203         if (err) {
 204             object_unref(obj);
 205             error_propagate(errp, err);
 206             return NULL;
 207         }
 208     } else {
 209         arm_cpu_finalize_features(ARM_CPU(obj), &error_abort);
 210     }
 211
 212     expansion_info = g_new0(CpuModelExpansionInfo, 1);
 213     expansion_info->model = g_malloc0(sizeof(*expansion_info->model));
 214     expansion_info->model->name = g_strdup(model->name);
 215
 216     qdict_out = qdict_new();
 217
 218     i = 0;
 219     while ((name = cpu_model_advertised_features[i++]) != NULL) {
 220         ObjectProperty *prop = object_property_find(obj, name, NULL);
 221         if (prop) {
 222             QObject *value;
 223
 224             assert(prop->get);
 225             value = object_property_get_qobject(obj, name, &error_abort);
 226
 227             qdict_put_obj(qdict_out, name, value);
 228         }
 229     }
 230
 231     if (!qdict_size(qdict_out)) {
 232         qobject_unref(qdict_out);
 233     } else {
 234         expansion_info->model->props = QOBJECT(qdict_out);
 235         expansion_info->model->has_props = true;
 236     }
 237
 238     object_unref(obj);
 239
 240     return expansion_info;
 241 }