1 /* 2 * virtio ccw machine 3 * 4 * Copyright 2012 IBM Corp. 5 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> 6 * 7 * This work is licensed under the terms of the GNU GPL, version 2 or (at 8 * your option) any later version. See the COPYING file in the top-level 9 * directory. 10 */ 11 12 #include "qemu/osdep.h" 13 #include "qapi/error.h" 14 #include "qemu-common.h" 15 #include "cpu.h" 16 #include "hw/boards.h" 17 #include "exec/address-spaces.h" 18 #include "s390-virtio.h" 19 #include "hw/s390x/sclp.h" 20 #include "hw/s390x/s390_flic.h" 21 #include "hw/s390x/ioinst.h" 22 #include "hw/s390x/css.h" 23 #include "virtio-ccw.h" 24 #include "qemu/config-file.h" 25 #include "s390-pci-bus.h" 26 #include "hw/s390x/storage-keys.h" 27 #include "hw/compat.h" 28 #include "ipl.h" 29 #include "hw/s390x/s390-virtio-ccw.h" 30 31 static const char *const reset_dev_types[] = { 32 "virtual-css-bridge", 33 "s390-sclp-event-facility", 34 "s390-flic", 35 "diag288", 36 }; 37 38 void subsystem_reset(void) 39 { 40 DeviceState *dev; 41 int i; 42 43 for (i = 0; i < ARRAY_SIZE(reset_dev_types); i++) { 44 dev = DEVICE(object_resolve_path_type("", reset_dev_types[i], NULL)); 45 if (dev) { 46 qdev_reset_all(dev); 47 } 48 } 49 } 50 51 static int virtio_ccw_hcall_notify(const uint64_t *args) 52 { 53 uint64_t subch_id = args[0]; 54 uint64_t queue = args[1]; 55 SubchDev *sch; 56 int cssid, ssid, schid, m; 57 58 if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) { 59 return -EINVAL; 60 } 61 sch = css_find_subch(m, cssid, ssid, schid); 62 if (!sch || !css_subch_visible(sch)) { 63 return -EINVAL; 64 } 65 if (queue >= VIRTIO_CCW_QUEUE_MAX) { 66 return -EINVAL; 67 } 68 virtio_queue_notify(virtio_ccw_get_vdev(sch), queue); 69 return 0; 70 71 } 72 73 static int virtio_ccw_hcall_early_printk(const uint64_t *args) 74 { 75 uint64_t mem = args[0]; 76 77 if (mem < ram_size) { 78 /* Early printk */ 79 return 0; 80 } 81 return -EINVAL; 82 } 83 84 static void virtio_ccw_register_hcalls(void) 85 { 86 s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY, 87 virtio_ccw_hcall_notify); 88 /* Tolerate early printk. */ 89 s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY, 90 virtio_ccw_hcall_early_printk); 91 } 92 93 void s390_memory_init(ram_addr_t mem_size) 94 { 95 MemoryRegion *sysmem = get_system_memory(); 96 MemoryRegion *ram = g_new(MemoryRegion, 1); 97 98 /* allocate RAM for core */ 99 memory_region_allocate_system_memory(ram, NULL, "s390.ram", mem_size); 100 memory_region_add_subregion(sysmem, 0, ram); 101 102 /* Initialize storage key device */ 103 s390_skeys_init(); 104 } 105 106 static void ccw_init(MachineState *machine) 107 { 108 int ret; 109 VirtualCssBus *css_bus; 110 DeviceState *dev; 111 112 s390_sclp_init(); 113 s390_memory_init(machine->ram_size); 114 115 /* get a BUS */ 116 css_bus = virtual_css_bus_init(); 117 s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline, 118 machine->initrd_filename, "s390-ccw.img", true); 119 s390_flic_init(); 120 121 dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE); 122 object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE, 123 OBJECT(dev), NULL); 124 qdev_init_nofail(dev); 125 126 /* register hypercalls */ 127 virtio_ccw_register_hcalls(); 128 129 /* init CPUs */ 130 s390_init_cpus(machine); 131 132 if (kvm_enabled()) { 133 kvm_s390_enable_css_support(s390_cpu_addr2state(0)); 134 } 135 /* 136 * Create virtual css and set it as default so that non mcss-e 137 * enabled guests only see virtio devices. 138 */ 139 ret = css_create_css_image(VIRTUAL_CSSID, true); 140 assert(ret == 0); 141 142 /* Create VirtIO network adapters */ 143 s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw"); 144 145 /* Register savevm handler for guest TOD clock */ 146 register_savevm(NULL, "todclock", 0, 1, 147 gtod_save, gtod_load, kvm_state); 148 } 149 150 static void s390_cpu_plug(HotplugHandler *hotplug_dev, 151 DeviceState *dev, Error **errp) 152 { 153 gchar *name; 154 S390CPU *cpu = S390_CPU(dev); 155 CPUState *cs = CPU(dev); 156 157 name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num); 158 object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name, 159 errp); 160 g_free(name); 161 } 162 163 static void s390_machine_device_plug(HotplugHandler *hotplug_dev, 164 DeviceState *dev, Error **errp) 165 { 166 if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { 167 s390_cpu_plug(hotplug_dev, dev, errp); 168 } 169 } 170 171 static HotplugHandler *s390_get_hotplug_handler(MachineState *machine, 172 DeviceState *dev) 173 { 174 if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { 175 return HOTPLUG_HANDLER(machine); 176 } 177 return NULL; 178 } 179 180 static void s390_hot_add_cpu(const int64_t id, Error **errp) 181 { 182 MachineState *machine = MACHINE(qdev_get_machine()); 183 184 s390x_new_cpu(machine->cpu_model, id, errp); 185 } 186 187 static void ccw_machine_class_init(ObjectClass *oc, void *data) 188 { 189 MachineClass *mc = MACHINE_CLASS(oc); 190 NMIClass *nc = NMI_CLASS(oc); 191 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc); 192 S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc); 193 194 s390mc->ri_allowed = true; 195 mc->init = ccw_init; 196 mc->reset = s390_machine_reset; 197 mc->hot_add_cpu = s390_hot_add_cpu; 198 mc->block_default_type = IF_VIRTIO; 199 mc->no_cdrom = 1; 200 mc->no_floppy = 1; 201 mc->no_serial = 1; 202 mc->no_parallel = 1; 203 mc->no_sdcard = 1; 204 mc->use_sclp = 1; 205 mc->max_cpus = 248; 206 mc->get_hotplug_handler = s390_get_hotplug_handler; 207 hc->plug = s390_machine_device_plug; 208 nc->nmi_monitor_handler = s390_nmi; 209 } 210 211 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp) 212 { 213 S390CcwMachineState *ms = S390_CCW_MACHINE(obj); 214 215 return ms->aes_key_wrap; 216 } 217 218 static inline void machine_set_aes_key_wrap(Object *obj, bool value, 219 Error **errp) 220 { 221 S390CcwMachineState *ms = S390_CCW_MACHINE(obj); 222 223 ms->aes_key_wrap = value; 224 } 225 226 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp) 227 { 228 S390CcwMachineState *ms = S390_CCW_MACHINE(obj); 229 230 return ms->dea_key_wrap; 231 } 232 233 static inline void machine_set_dea_key_wrap(Object *obj, bool value, 234 Error **errp) 235 { 236 S390CcwMachineState *ms = S390_CCW_MACHINE(obj); 237 238 ms->dea_key_wrap = value; 239 } 240 241 bool ri_allowed(void) 242 { 243 if (kvm_enabled()) { 244 MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine()); 245 if (object_class_dynamic_cast(OBJECT_CLASS(mc), 246 TYPE_S390_CCW_MACHINE)) { 247 S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc); 248 249 return s390mc->ri_allowed; 250 } 251 } 252 return 0; 253 } 254 255 static inline void s390_machine_initfn(Object *obj) 256 { 257 object_property_add_bool(obj, "aes-key-wrap", 258 machine_get_aes_key_wrap, 259 machine_set_aes_key_wrap, NULL); 260 object_property_set_description(obj, "aes-key-wrap", 261 "enable/disable AES key wrapping using the CPACF wrapping key", 262 NULL); 263 object_property_set_bool(obj, true, "aes-key-wrap", NULL); 264 265 object_property_add_bool(obj, "dea-key-wrap", 266 machine_get_dea_key_wrap, 267 machine_set_dea_key_wrap, NULL); 268 object_property_set_description(obj, "dea-key-wrap", 269 "enable/disable DEA key wrapping using the CPACF wrapping key", 270 NULL); 271 object_property_set_bool(obj, true, "dea-key-wrap", NULL); 272 } 273 274 static const TypeInfo ccw_machine_info = { 275 .name = TYPE_S390_CCW_MACHINE, 276 .parent = TYPE_MACHINE, 277 .abstract = true, 278 .instance_size = sizeof(S390CcwMachineState), 279 .instance_init = s390_machine_initfn, 280 .class_size = sizeof(S390CcwMachineClass), 281 .class_init = ccw_machine_class_init, 282 .interfaces = (InterfaceInfo[]) { 283 { TYPE_NMI }, 284 { TYPE_HOTPLUG_HANDLER}, 285 { } 286 }, 287 }; 288 289 #define DEFINE_CCW_MACHINE(suffix, verstr, latest) \ 290 static void ccw_machine_##suffix##_class_init(ObjectClass *oc, \ 291 void *data) \ 292 { \ 293 MachineClass *mc = MACHINE_CLASS(oc); \ 294 ccw_machine_##suffix##_class_options(mc); \ 295 mc->desc = "VirtIO-ccw based S390 machine v" verstr; \ 296 if (latest) { \ 297 mc->alias = "s390-ccw-virtio"; \ 298 mc->is_default = 1; \ 299 } \ 300 } \ 301 static void ccw_machine_##suffix##_instance_init(Object *obj) \ 302 { \ 303 MachineState *machine = MACHINE(obj); \ 304 ccw_machine_##suffix##_instance_options(machine); \ 305 } \ 306 static const TypeInfo ccw_machine_##suffix##_info = { \ 307 .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr), \ 308 .parent = TYPE_S390_CCW_MACHINE, \ 309 .class_init = ccw_machine_##suffix##_class_init, \ 310 .instance_init = ccw_machine_##suffix##_instance_init, \ 311 }; \ 312 static void ccw_machine_register_##suffix(void) \ 313 { \ 314 type_register_static(&ccw_machine_##suffix##_info); \ 315 } \ 316 type_init(ccw_machine_register_##suffix) 317 318 #define CCW_COMPAT_2_6 \ 319 HW_COMPAT_2_6 \ 320 {\ 321 .driver = TYPE_S390_IPL,\ 322 .property = "iplbext_migration",\ 323 .value = "off",\ 324 }, 325 326 #define CCW_COMPAT_2_5 \ 327 CCW_COMPAT_2_6 \ 328 HW_COMPAT_2_5 329 330 #define CCW_COMPAT_2_4 \ 331 HW_COMPAT_2_4 \ 332 {\ 333 .driver = TYPE_S390_SKEYS,\ 334 .property = "migration-enabled",\ 335 .value = "off",\ 336 },{\ 337 .driver = "virtio-blk-ccw",\ 338 .property = "max_revision",\ 339 .value = "0",\ 340 },{\ 341 .driver = "virtio-balloon-ccw",\ 342 .property = "max_revision",\ 343 .value = "0",\ 344 },{\ 345 .driver = "virtio-serial-ccw",\ 346 .property = "max_revision",\ 347 .value = "0",\ 348 },{\ 349 .driver = "virtio-9p-ccw",\ 350 .property = "max_revision",\ 351 .value = "0",\ 352 },{\ 353 .driver = "virtio-rng-ccw",\ 354 .property = "max_revision",\ 355 .value = "0",\ 356 },{\ 357 .driver = "virtio-net-ccw",\ 358 .property = "max_revision",\ 359 .value = "0",\ 360 },{\ 361 .driver = "virtio-scsi-ccw",\ 362 .property = "max_revision",\ 363 .value = "0",\ 364 },{\ 365 .driver = "vhost-scsi-ccw",\ 366 .property = "max_revision",\ 367 .value = "0",\ 368 }, 369 370 static void ccw_machine_2_7_instance_options(MachineState *machine) 371 { 372 } 373 374 static void ccw_machine_2_7_class_options(MachineClass *mc) 375 { 376 } 377 DEFINE_CCW_MACHINE(2_7, "2.7", true); 378 379 static void ccw_machine_2_6_instance_options(MachineState *machine) 380 { 381 ccw_machine_2_7_instance_options(machine); 382 } 383 384 static void ccw_machine_2_6_class_options(MachineClass *mc) 385 { 386 S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc); 387 388 s390mc->ri_allowed = false; 389 ccw_machine_2_7_class_options(mc); 390 SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_6); 391 } 392 DEFINE_CCW_MACHINE(2_6, "2.6", false); 393 394 static void ccw_machine_2_5_instance_options(MachineState *machine) 395 { 396 ccw_machine_2_6_instance_options(machine); 397 } 398 399 static void ccw_machine_2_5_class_options(MachineClass *mc) 400 { 401 ccw_machine_2_6_class_options(mc); 402 SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5); 403 } 404 DEFINE_CCW_MACHINE(2_5, "2.5", false); 405 406 static void ccw_machine_2_4_instance_options(MachineState *machine) 407 { 408 ccw_machine_2_5_instance_options(machine); 409 } 410 411 static void ccw_machine_2_4_class_options(MachineClass *mc) 412 { 413 ccw_machine_2_5_class_options(mc); 414 SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4); 415 } 416 DEFINE_CCW_MACHINE(2_4, "2.4", false); 417 418 static void ccw_machine_register_types(void) 419 { 420 type_register_static(&ccw_machine_info); 421 } 422 423 type_init(ccw_machine_register_types) 424