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/qdict.h"
32 #include "qom/qom-qobject.h"
33
gic_cap_new(int version)34 static GICCapability *gic_cap_new(int version)
35 {
36 GICCapability *cap = g_new0(GICCapability, 1);
37 cap->version = version;
38 /* by default, support none */
39 cap->emulated = false;
40 cap->kernel = false;
41 return cap;
42 }
43
gic_cap_kvm_probe(GICCapability * v2,GICCapability * v3)44 static inline void gic_cap_kvm_probe(GICCapability *v2, GICCapability *v3)
45 {
46 #ifdef CONFIG_KVM
47 int fdarray[3];
48
49 if (!kvm_arm_create_scratch_host_vcpu(NULL, fdarray, NULL)) {
50 return;
51 }
52
53 /* Test KVM GICv2 */
54 if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V2)) {
55 v2->kernel = true;
56 }
57
58 /* Test KVM GICv3 */
59 if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V3)) {
60 v3->kernel = true;
61 }
62
63 kvm_arm_destroy_scratch_host_vcpu(fdarray);
64 #endif
65 }
66
qmp_query_gic_capabilities(Error ** errp)67 GICCapabilityList *qmp_query_gic_capabilities(Error **errp)
68 {
69 GICCapabilityList *head = NULL;
70 GICCapability *v2 = gic_cap_new(2), *v3 = gic_cap_new(3);
71
72 v2->emulated = true;
73 v3->emulated = true;
74
75 gic_cap_kvm_probe(v2, v3);
76
77 QAPI_LIST_PREPEND(head, v2);
78 QAPI_LIST_PREPEND(head, v3);
79
80 return head;
81 }
82
83 QEMU_BUILD_BUG_ON(ARM_MAX_VQ > 16);
84
85 /*
86 * These are cpu model features we want to advertise. The order here
87 * matters as this is the order in which qmp_query_cpu_model_expansion
88 * will attempt to set them. If there are dependencies between features,
89 * then the order that considers those dependencies must be used.
90 */
91 static const char *cpu_model_advertised_features[] = {
92 "aarch64", "pmu", "sve",
93 "sve128", "sve256", "sve384", "sve512",
94 "sve640", "sve768", "sve896", "sve1024", "sve1152", "sve1280",
95 "sve1408", "sve1536", "sve1664", "sve1792", "sve1920", "sve2048",
96 "kvm-no-adjvtime", "kvm-steal-time",
97 "pauth", "pauth-impdef", "pauth-qarma3",
98 NULL
99 };
100
qmp_query_cpu_model_expansion(CpuModelExpansionType type,CpuModelInfo * model,Error ** errp)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;
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 obj = object_new(object_class_get_name(oc));
154
155 if (model->props) {
156 Visitor *visitor;
157 Error *err = NULL;
158
159 visitor = qobject_input_visitor_new(model->props);
160 if (!visit_start_struct(visitor, "model.props", NULL, 0, errp)) {
161 visit_free(visitor);
162 object_unref(obj);
163 return NULL;
164 }
165
166 qdict_in = qobject_to(QDict, model->props);
167 i = 0;
168 while ((name = cpu_model_advertised_features[i++]) != NULL) {
169 if (qdict_get(qdict_in, name)) {
170 if (!object_property_set(obj, name, visitor, &err)) {
171 break;
172 }
173 }
174 }
175
176 if (!err) {
177 visit_check_struct(visitor, &err);
178 }
179 if (!err) {
180 arm_cpu_finalize_features(ARM_CPU(obj), &err);
181 }
182 visit_end_struct(visitor, NULL);
183 visit_free(visitor);
184 if (err) {
185 object_unref(obj);
186 error_propagate(errp, err);
187 return NULL;
188 }
189 } else {
190 arm_cpu_finalize_features(ARM_CPU(obj), &error_abort);
191 }
192
193 expansion_info = g_new0(CpuModelExpansionInfo, 1);
194 expansion_info->model = g_malloc0(sizeof(*expansion_info->model));
195 expansion_info->model->name = g_strdup(model->name);
196
197 qdict_out = qdict_new();
198
199 i = 0;
200 while ((name = cpu_model_advertised_features[i++]) != NULL) {
201 ObjectProperty *prop = object_property_find(obj, name);
202 if (prop) {
203 QObject *value;
204
205 assert(prop->get);
206 value = object_property_get_qobject(obj, name, &error_abort);
207
208 qdict_put_obj(qdict_out, name, value);
209 }
210 }
211
212 if (!qdict_size(qdict_out)) {
213 qobject_unref(qdict_out);
214 } else {
215 expansion_info->model->props = QOBJECT(qdict_out);
216 }
217
218 object_unref(obj);
219
220 return expansion_info;
221 }
222
arm_cpu_add_definition(gpointer data,gpointer user_data)223 static void arm_cpu_add_definition(gpointer data, gpointer user_data)
224 {
225 ObjectClass *oc = data;
226 CpuDefinitionInfoList **cpu_list = user_data;
227 CpuDefinitionInfo *info;
228 const char *typename;
229
230 typename = object_class_get_name(oc);
231 info = g_malloc0(sizeof(*info));
232 info->name = cpu_model_from_type(typename);
233 info->q_typename = g_strdup(typename);
234
235 QAPI_LIST_PREPEND(*cpu_list, info);
236 }
237
qmp_query_cpu_definitions(Error ** errp)238 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
239 {
240 CpuDefinitionInfoList *cpu_list = NULL;
241 GSList *list;
242
243 list = object_class_get_list(TYPE_ARM_CPU, false);
244 g_slist_foreach(list, arm_cpu_add_definition, &cpu_list);
245 g_slist_free(list);
246
247 return cpu_list;
248 }
249