hw/s390x/s390-virtio-ccw.c

   1 /*
   2  * virtio ccw machine
   3  *
   4  * Copyright 2012 IBM Corp.
   5  * Author(s): Cornelia Huck <[email protected]>
   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/s390x/storage-attributes.h"
  28 #include "hw/compat.h"
  29 #include "ipl.h"
  30 #include "hw/s390x/s390-virtio-ccw.h"
  31 #include "hw/s390x/css-bridge.h"
  32 #include "migration/register.h"
  33
  34 static const char *const reset_dev_types[] = {
  35     TYPE_VIRTUAL_CSS_BRIDGE,
  36     "s390-sclp-event-facility",
  37     "s390-flic",
  38     "diag288",
  39 };
  40
  41 void subsystem_reset(void)
  42 {
  43     DeviceState *dev;
  44     int i;
  45
  46     for (i = 0; i < ARRAY_SIZE(reset_dev_types); i++) {
  47         dev = DEVICE(object_resolve_path_type("", reset_dev_types[i], NULL));
  48         if (dev) {
  49             qdev_reset_all(dev);
  50         }
  51     }
  52 }
  53
  54 static int virtio_ccw_hcall_notify(const uint64_t *args)
  55 {
  56     uint64_t subch_id = args[0];
  57     uint64_t queue = args[1];
  58     SubchDev *sch;
  59     int cssid, ssid, schid, m;
  60
  61     if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
  62         return -EINVAL;
  63     }
  64     sch = css_find_subch(m, cssid, ssid, schid);
  65     if (!sch || !css_subch_visible(sch)) {
  66         return -EINVAL;
  67     }
  68     if (queue >= VIRTIO_QUEUE_MAX) {
  69         return -EINVAL;
  70     }
  71     virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
  72     return 0;
  73
  74 }
  75
  76 static int virtio_ccw_hcall_early_printk(const uint64_t *args)
  77 {
  78     uint64_t mem = args[0];
  79
  80     if (mem < ram_size) {
  81         /* Early printk */
  82         return 0;
  83     }
  84     return -EINVAL;
  85 }
  86
  87 static void virtio_ccw_register_hcalls(void)
  88 {
  89     s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY,
  90                                    virtio_ccw_hcall_notify);
  91     /* Tolerate early printk. */
  92     s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
  93                                    virtio_ccw_hcall_early_printk);
  94 }
  95
  96 void s390_memory_init(ram_addr_t mem_size)
  97 {
  98     MemoryRegion *sysmem = get_system_memory();
  99     MemoryRegion *ram = g_new(MemoryRegion, 1);
 100
 101     /* allocate RAM for core */
 102     memory_region_allocate_system_memory(ram, NULL, "s390.ram", mem_size);
 103     memory_region_add_subregion(sysmem, 0, ram);
 104
 105     /* Initialize storage key device */
 106     s390_skeys_init();
 107     /* Initialize storage attributes device */
 108     s390_stattrib_init();
 109 }
 110
 111 static SaveVMHandlers savevm_gtod = {
 112     .save_state = gtod_save,
 113     .load_state = gtod_load,
 114 };
 115
 116 static void ccw_init(MachineState *machine)
 117 {
 118     int ret;
 119     VirtualCssBus *css_bus;
 120     DeviceState *dev;
 121
 122     s390_sclp_init();
 123     s390_memory_init(machine->ram_size);
 124
 125     s390_flic_init();
 126
 127     /* get a BUS */
 128     css_bus = virtual_css_bus_init();
 129     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
 130                       machine->initrd_filename, "s390-ccw.img",
 131                       "s390-netboot.img", true);
 132
 133     dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
 134     object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
 135                               OBJECT(dev), NULL);
 136     qdev_init_nofail(dev);
 137
 138     /* register hypercalls */
 139     virtio_ccw_register_hcalls();
 140
 141     /* init CPUs */
 142     s390_init_cpus(machine);
 143
 144     if (kvm_enabled()) {
 145         kvm_s390_enable_css_support(s390_cpu_addr2state(0));
 146     }
 147     /*
 148      * Non mcss-e enabled guests only see the devices from the default
 149      * css, which is determined by the value of the squash_mcss property.
 150      * Note: we must not squash non virtual devices to css 0xFE.
 151      */
 152     if (css_bus->squash_mcss) {
 153         ret = css_create_css_image(0, true);
 154     } else {
 155         ret = css_create_css_image(VIRTUAL_CSSID, true);
 156     }
 157     assert(ret == 0);
 158
 159     /* Create VirtIO network adapters */
 160     s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
 161
 162     /* Register savevm handler for guest TOD clock */
 163     register_savevm_live(NULL, "todclock", 0, 1, &savevm_gtod, kvm_state);
 164 }
 165
 166 static void s390_cpu_plug(HotplugHandler *hotplug_dev,
 167                         DeviceState *dev, Error **errp)
 168 {
 169     gchar *name;
 170     S390CPU *cpu = S390_CPU(dev);
 171     CPUState *cs = CPU(dev);
 172
 173     name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
 174     object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
 175                              errp);
 176     g_free(name);
 177 }
 178
 179 static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
 180                                      DeviceState *dev, Error **errp)
 181 {
 182     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 183         s390_cpu_plug(hotplug_dev, dev, errp);
 184     }
 185 }
 186
 187 static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
 188                                                 DeviceState *dev)
 189 {
 190     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 191         return HOTPLUG_HANDLER(machine);
 192     }
 193     return NULL;
 194 }
 195
 196 static void s390_hot_add_cpu(const int64_t id, Error **errp)
 197 {
 198     MachineState *machine = MACHINE(qdev_get_machine());
 199
 200     s390x_new_cpu(machine->cpu_model, id, errp);
 201 }
 202
 203 static void ccw_machine_class_init(ObjectClass *oc, void *data)
 204 {
 205     MachineClass *mc = MACHINE_CLASS(oc);
 206     NMIClass *nc = NMI_CLASS(oc);
 207     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 208     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 209
 210     s390mc->ri_allowed = true;
 211     s390mc->cpu_model_allowed = true;
 212     s390mc->css_migration_enabled = true;
 213     mc->init = ccw_init;
 214     mc->reset = s390_machine_reset;
 215     mc->hot_add_cpu = s390_hot_add_cpu;
 216     mc->block_default_type = IF_VIRTIO;
 217     mc->no_cdrom = 1;
 218     mc->no_floppy = 1;
 219     mc->no_serial = 1;
 220     mc->no_parallel = 1;
 221     mc->no_sdcard = 1;
 222     mc->use_sclp = 1;
 223     mc->max_cpus = 248;
 224     mc->get_hotplug_handler = s390_get_hotplug_handler;
 225     hc->plug = s390_machine_device_plug;
 226     nc->nmi_monitor_handler = s390_nmi;
 227 }
 228
 229 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
 230 {
 231     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 232
 233     return ms->aes_key_wrap;
 234 }
 235
 236 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
 237                                             Error **errp)
 238 {
 239     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 240
 241     ms->aes_key_wrap = value;
 242 }
 243
 244 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
 245 {
 246     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 247
 248     return ms->dea_key_wrap;
 249 }
 250
 251 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
 252                                             Error **errp)
 253 {
 254     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 255
 256     ms->dea_key_wrap = value;
 257 }
 258
 259 static S390CcwMachineClass *current_mc;
 260
 261 static S390CcwMachineClass *get_machine_class(void)
 262 {
 263     if (unlikely(!current_mc)) {
 264         /*
 265         * No s390 ccw machine was instantiated, we are likely to
 266         * be called for the 'none' machine. The properties will
 267         * have their after-initialization values.
 268         */
 269         current_mc = S390_MACHINE_CLASS(
 270                      object_class_by_name(TYPE_S390_CCW_MACHINE));
 271     }
 272     return current_mc;
 273 }
 274
 275 bool ri_allowed(void)
 276 {
 277     if (!kvm_enabled()) {
 278         return false;
 279     }
 280     /* for "none" machine this results in true */
 281     return get_machine_class()->ri_allowed;
 282 }
 283
 284 bool cpu_model_allowed(void)
 285 {
 286     /* for "none" machine this results in true */
 287     return get_machine_class()->cpu_model_allowed;
 288 }
 289
 290 static char *machine_get_loadparm(Object *obj, Error **errp)
 291 {
 292     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 293
 294     return g_memdup(ms->loadparm, sizeof(ms->loadparm));
 295 }
 296
 297 static void machine_set_loadparm(Object *obj, const char *val, Error **errp)
 298 {
 299     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 300     int i;
 301
 302     for (i = 0; i < sizeof(ms->loadparm) && val[i]; i++) {
 303         uint8_t c = toupper(val[i]); /* mimic HMC */
 304
 305         if (('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || (c == '.') ||
 306             (c == ' ')) {
 307             ms->loadparm[i] = c;
 308         } else {
 309             error_setg(errp, "LOADPARM: invalid character '%c' (ASCII 0x%02x)",
 310                        c, c);
 311             return;
 312         }
 313     }
 314
 315     for (; i < sizeof(ms->loadparm); i++) {
 316         ms->loadparm[i] = ' '; /* pad right with spaces */
 317     }
 318 }
 319 static inline bool machine_get_squash_mcss(Object *obj, Error **errp)
 320 {
 321     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 322
 323     return ms->s390_squash_mcss;
 324 }
 325
 326 static inline void machine_set_squash_mcss(Object *obj, bool value,
 327                                            Error **errp)
 328 {
 329     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 330
 331     ms->s390_squash_mcss = value;
 332 }
 333
 334 static inline void s390_machine_initfn(Object *obj)
 335 {
 336     object_property_add_bool(obj, "aes-key-wrap",
 337                              machine_get_aes_key_wrap,
 338                              machine_set_aes_key_wrap, NULL);
 339     object_property_set_description(obj, "aes-key-wrap",
 340             "enable/disable AES key wrapping using the CPACF wrapping key",
 341             NULL);
 342     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 343
 344     object_property_add_bool(obj, "dea-key-wrap",
 345                              machine_get_dea_key_wrap,
 346                              machine_set_dea_key_wrap, NULL);
 347     object_property_set_description(obj, "dea-key-wrap",
 348             "enable/disable DEA key wrapping using the CPACF wrapping key",
 349             NULL);
 350     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 351     object_property_add_str(obj, "loadparm",
 352             machine_get_loadparm, machine_set_loadparm, NULL);
 353     object_property_set_description(obj, "loadparm",
 354             "Up to 8 chars in set of [A-Za-z0-9. ] (lower case chars converted"
 355             " to upper case) to pass to machine loader, boot manager,"
 356             " and guest kernel",
 357             NULL);
 358     object_property_add_bool(obj, "s390-squash-mcss",
 359                              machine_get_squash_mcss,
 360                              machine_set_squash_mcss, NULL);
 361     object_property_set_description(obj, "s390-squash-mcss",
 362             "enable/disable squashing subchannels into the default css",
 363             NULL);
 364     object_property_set_bool(obj, false, "s390-squash-mcss", NULL);
 365 }
 366
 367 static const TypeInfo ccw_machine_info = {
 368     .name          = TYPE_S390_CCW_MACHINE,
 369     .parent        = TYPE_MACHINE,
 370     .abstract      = true,
 371     .instance_size = sizeof(S390CcwMachineState),
 372     .instance_init = s390_machine_initfn,
 373     .class_size = sizeof(S390CcwMachineClass),
 374     .class_init    = ccw_machine_class_init,
 375     .interfaces = (InterfaceInfo[]) {
 376         { TYPE_NMI },
 377         { TYPE_HOTPLUG_HANDLER},
 378         { }
 379     },
 380 };
 381
 382 bool css_migration_enabled(void)
 383 {
 384     return get_machine_class()->css_migration_enabled;
 385 }
 386
 387 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 388     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 389                                                   void *data)                 \
 390     {                                                                         \
 391         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 392         ccw_machine_##suffix##_class_options(mc);                             \
 393         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 394         if (latest) {                                                         \
 395             mc->alias = "s390-ccw-virtio";                                    \
 396             mc->is_default = 1;                                               \
 397         }                                                                     \
 398     }                                                                         \
 399     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 400     {                                                                         \
 401         MachineState *machine = MACHINE(obj);                                 \
 402         current_mc = S390_MACHINE_CLASS(MACHINE_GET_CLASS(machine));          \
 403         ccw_machine_##suffix##_instance_options(machine);                     \
 404     }                                                                         \
 405     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 406         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 407         .parent = TYPE_S390_CCW_MACHINE,                                      \
 408         .class_init = ccw_machine_##suffix##_class_init,                      \
 409         .instance_init = ccw_machine_##suffix##_instance_init,                \
 410     };                                                                        \
 411     static void ccw_machine_register_##suffix(void)                           \
 412     {                                                                         \
 413         type_register_static(&ccw_machine_##suffix##_info);                   \
 414     }                                                                         \
 415     type_init(ccw_machine_register_##suffix)
 416
 417 #define CCW_COMPAT_2_9 \
 418         HW_COMPAT_2_9 \
 419         {\
 420             .driver   = TYPE_S390_STATTRIB,\
 421             .property = "migration-enabled",\
 422             .value    = "off",\
 423         },
 424
 425 #define CCW_COMPAT_2_8 \
 426         HW_COMPAT_2_8 \
 427         {\
 428             .driver   = TYPE_S390_FLIC_COMMON,\
 429             .property = "adapter_routes_max_batch",\
 430             .value    = "64",\
 431         },
 432
 433 #define CCW_COMPAT_2_7 \
 434         HW_COMPAT_2_7
 435
 436 #define CCW_COMPAT_2_6 \
 437         HW_COMPAT_2_6 \
 438         {\
 439             .driver   = TYPE_S390_IPL,\
 440             .property = "iplbext_migration",\
 441             .value    = "off",\
 442         }, {\
 443             .driver   = TYPE_VIRTUAL_CSS_BRIDGE,\
 444             .property = "css_dev_path",\
 445             .value    = "off",\
 446         },
 447
 448 #define CCW_COMPAT_2_5 \
 449         HW_COMPAT_2_5
 450
 451 #define CCW_COMPAT_2_4 \
 452         HW_COMPAT_2_4 \
 453         {\
 454             .driver   = TYPE_S390_SKEYS,\
 455             .property = "migration-enabled",\
 456             .value    = "off",\
 457         },{\
 458             .driver   = "virtio-blk-ccw",\
 459             .property = "max_revision",\
 460             .value    = "0",\
 461         },{\
 462             .driver   = "virtio-balloon-ccw",\
 463             .property = "max_revision",\
 464             .value    = "0",\
 465         },{\
 466             .driver   = "virtio-serial-ccw",\
 467             .property = "max_revision",\
 468             .value    = "0",\
 469         },{\
 470             .driver   = "virtio-9p-ccw",\
 471             .property = "max_revision",\
 472             .value    = "0",\
 473         },{\
 474             .driver   = "virtio-rng-ccw",\
 475             .property = "max_revision",\
 476             .value    = "0",\
 477         },{\
 478             .driver   = "virtio-net-ccw",\
 479             .property = "max_revision",\
 480             .value    = "0",\
 481         },{\
 482             .driver   = "virtio-scsi-ccw",\
 483             .property = "max_revision",\
 484             .value    = "0",\
 485         },{\
 486             .driver   = "vhost-scsi-ccw",\
 487             .property = "max_revision",\
 488             .value    = "0",\
 489         },
 490
 491 static void ccw_machine_2_10_instance_options(MachineState *machine)
 492 {
 493     if (css_migration_enabled()) {
 494         css_register_vmstate();
 495     }
 496 }
 497
 498 static void ccw_machine_2_10_class_options(MachineClass *mc)
 499 {
 500 }
 501 DEFINE_CCW_MACHINE(2_10, "2.10", true);
 502
 503 static void ccw_machine_2_9_instance_options(MachineState *machine)
 504 {
 505     ccw_machine_2_10_instance_options(machine);
 506 }
 507
 508 static void ccw_machine_2_9_class_options(MachineClass *mc)
 509 {
 510     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 511
 512     ccw_machine_2_10_class_options(mc);
 513     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_9);
 514     s390mc->css_migration_enabled = false;
 515 }
 516 DEFINE_CCW_MACHINE(2_9, "2.9", false);
 517
 518 static void ccw_machine_2_8_instance_options(MachineState *machine)
 519 {
 520     ccw_machine_2_9_instance_options(machine);
 521 }
 522
 523 static void ccw_machine_2_8_class_options(MachineClass *mc)
 524 {
 525     ccw_machine_2_9_class_options(mc);
 526     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_8);
 527 }
 528 DEFINE_CCW_MACHINE(2_8, "2.8", false);
 529
 530 static void ccw_machine_2_7_instance_options(MachineState *machine)
 531 {
 532     ccw_machine_2_8_instance_options(machine);
 533 }
 534
 535 static void ccw_machine_2_7_class_options(MachineClass *mc)
 536 {
 537     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 538
 539     s390mc->cpu_model_allowed = false;
 540     ccw_machine_2_8_class_options(mc);
 541     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_7);
 542 }
 543 DEFINE_CCW_MACHINE(2_7, "2.7", false);
 544
 545 static void ccw_machine_2_6_instance_options(MachineState *machine)
 546 {
 547     ccw_machine_2_7_instance_options(machine);
 548 }
 549
 550 static void ccw_machine_2_6_class_options(MachineClass *mc)
 551 {
 552     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 553
 554     s390mc->ri_allowed = false;
 555     ccw_machine_2_7_class_options(mc);
 556     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_6);
 557 }
 558 DEFINE_CCW_MACHINE(2_6, "2.6", false);
 559
 560 static void ccw_machine_2_5_instance_options(MachineState *machine)
 561 {
 562     ccw_machine_2_6_instance_options(machine);
 563 }
 564
 565 static void ccw_machine_2_5_class_options(MachineClass *mc)
 566 {
 567     ccw_machine_2_6_class_options(mc);
 568     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 569 }
 570 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 571
 572 static void ccw_machine_2_4_instance_options(MachineState *machine)
 573 {
 574     ccw_machine_2_5_instance_options(machine);
 575 }
 576
 577 static void ccw_machine_2_4_class_options(MachineClass *mc)
 578 {
 579     ccw_machine_2_5_class_options(mc);
 580     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 581 }
 582 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 583
 584 static void ccw_machine_register_types(void)
 585 {
 586     type_register_static(&ccw_machine_info);
 587 }
 588
 589 type_init(ccw_machine_register_types)