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     "pauth", "pauth-impdef",
  99     NULL
 100 };
 101
 102 CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
 103                                                      CpuModelInfo *model,
 104                                                      Error **errp)
 105 {
 106     CpuModelExpansionInfo *expansion_info;
 107     const QDict *qdict_in = NULL;
 108     QDict *qdict_out;
 109     ObjectClass *oc;
 110     Object *obj;
 111     const char *name;
 112     int i;
 113
 114     if (type != CPU_MODEL_EXPANSION_TYPE_FULL) {
 115         error_setg(errp, "The requested expansion type is not supported");
 116         return NULL;
 117     }
 118
 119     if (!kvm_enabled() && !strcmp(model->name, "host")) {
 120         error_setg(errp, "The CPU type '%s' requires KVM", model->name);
 121         return NULL;
 122     }
 123
 124     oc = cpu_class_by_name(TYPE_ARM_CPU, model->name);
 125     if (!oc) {
 126         error_setg(errp, "The CPU type '%s' is not a recognized ARM CPU type",
 127                    model->name);
 128         return NULL;
 129     }
 130
 131     if (kvm_enabled()) {
 132         bool supported = false;
 133
 134         if (!strcmp(model->name, "host") || !strcmp(model->name, "max")) {
 135             /* These are kvmarm's recommended cpu types */
 136             supported = true;
 137         } else if (current_machine->cpu_type) {
 138             const char *cpu_type = current_machine->cpu_type;
 139             int len = strlen(cpu_type) - strlen(ARM_CPU_TYPE_SUFFIX);
 140
 141             if (strlen(model->name) == len &&
 142                 !strncmp(model->name, cpu_type, len)) {
 143                 /* KVM is enabled and we're using this type, so it works. */
 144                 supported = true;
 145             }
 146         }
 147         if (!supported) {
 148             error_setg(errp, "We cannot guarantee the CPU type '%s' works "
 149                              "with KVM on this host", model->name);
 150             return NULL;
 151         }
 152     }
 153
 154     if (model->props) {
 155         qdict_in = qobject_to(QDict, model->props);
 156         if (!qdict_in) {
 157             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 158             return NULL;
 159         }
 160     }
 161
 162     obj = object_new(object_class_get_name(oc));
 163
 164     if (qdict_in) {
 165         Visitor *visitor;
 166         Error *err = NULL;
 167
 168         visitor = qobject_input_visitor_new(model->props);
 169         if (!visit_start_struct(visitor, NULL, NULL, 0, errp)) {
 170             visit_free(visitor);
 171             object_unref(obj);
 172             return NULL;
 173         }
 174
 175         i = 0;
 176         while ((name = cpu_model_advertised_features[i++]) != NULL) {
 177             if (qdict_get(qdict_in, name)) {
 178                 if (!object_property_set(obj, name, visitor, &err)) {
 179                     break;
 180                 }
 181             }
 182         }
 183
 184         if (!err) {
 185             visit_check_struct(visitor, &err);
 186         }
 187         if (!err) {
 188             arm_cpu_finalize_features(ARM_CPU(obj), &err);
 189         }
 190         visit_end_struct(visitor, NULL);
 191         visit_free(visitor);
 192         if (err) {
 193             object_unref(obj);
 194             error_propagate(errp, err);
 195             return NULL;
 196         }
 197     } else {
 198         arm_cpu_finalize_features(ARM_CPU(obj), &error_abort);
 199     }
 200
 201     expansion_info = g_new0(CpuModelExpansionInfo, 1);
 202     expansion_info->model = g_malloc0(sizeof(*expansion_info->model));
 203     expansion_info->model->name = g_strdup(model->name);
 204
 205     qdict_out = qdict_new();
 206
 207     i = 0;
 208     while ((name = cpu_model_advertised_features[i++]) != NULL) {
 209         ObjectProperty *prop = object_property_find(obj, name);
 210         if (prop) {
 211             QObject *value;
 212
 213             assert(prop->get);
 214             value = object_property_get_qobject(obj, name, &error_abort);
 215
 216             qdict_put_obj(qdict_out, name, value);
 217         }
 218     }
 219
 220     if (!qdict_size(qdict_out)) {
 221         qobject_unref(qdict_out);
 222     } else {
 223         expansion_info->model->props = QOBJECT(qdict_out);
 224         expansion_info->model->has_props = true;
 225     }
 226
 227     object_unref(obj);
 228
 229     return expansion_info;
 230 }