hw/s390x/s390-virtio-ccw.c

   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/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 #include "cpu_models.h"
  34
  35 static const char *const reset_dev_types[] = {
  36     TYPE_VIRTUAL_CSS_BRIDGE,
  37     "s390-sclp-event-facility",
  38     "s390-flic",
  39     "diag288",
  40 };
  41
  42 void subsystem_reset(void)
  43 {
  44     DeviceState *dev;
  45     int i;
  46
  47     for (i = 0; i < ARRAY_SIZE(reset_dev_types); i++) {
  48         dev = DEVICE(object_resolve_path_type("", reset_dev_types[i], NULL));
  49         if (dev) {
  50             qdev_reset_all(dev);
  51         }
  52     }
  53 }
  54
  55 static int virtio_ccw_hcall_notify(const uint64_t *args)
  56 {
  57     uint64_t subch_id = args[0];
  58     uint64_t queue = args[1];
  59     SubchDev *sch;
  60     int cssid, ssid, schid, m;
  61
  62     if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
  63         return -EINVAL;
  64     }
  65     sch = css_find_subch(m, cssid, ssid, schid);
  66     if (!sch || !css_subch_visible(sch)) {
  67         return -EINVAL;
  68     }
  69     if (queue >= VIRTIO_QUEUE_MAX) {
  70         return -EINVAL;
  71     }
  72     virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
  73     return 0;
  74
  75 }
  76
  77 static int virtio_ccw_hcall_early_printk(const uint64_t *args)
  78 {
  79     uint64_t mem = args[0];
  80
  81     if (mem < ram_size) {
  82         /* Early printk */
  83         return 0;
  84     }
  85     return -EINVAL;
  86 }
  87
  88 static void virtio_ccw_register_hcalls(void)
  89 {
  90     s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY,
  91                                    virtio_ccw_hcall_notify);
  92     /* Tolerate early printk. */
  93     s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
  94                                    virtio_ccw_hcall_early_printk);
  95 }
  96
  97 void s390_memory_init(ram_addr_t mem_size)
  98 {
  99     MemoryRegion *sysmem = get_system_memory();
 100     MemoryRegion *ram = g_new(MemoryRegion, 1);
 101
 102     /* allocate RAM for core */
 103     memory_region_allocate_system_memory(ram, NULL, "s390.ram", mem_size);
 104     memory_region_add_subregion(sysmem, 0, ram);
 105
 106     /* Initialize storage key device */
 107     s390_skeys_init();
 108     /* Initialize storage attributes device */
 109     s390_stattrib_init();
 110 }
 111
 112 static SaveVMHandlers savevm_gtod = {
 113     .save_state = gtod_save,
 114     .load_state = gtod_load,
 115 };
 116
 117 static void ccw_init(MachineState *machine)
 118 {
 119     int ret;
 120     VirtualCssBus *css_bus;
 121
 122     s390_sclp_init();
 123     s390_memory_init(machine->ram_size);
 124
 125     /* init CPUs (incl. CPU model) early so s390_has_feature() works */
 126     s390_init_cpus(machine);
 127
 128     s390_flic_init();
 129
 130     /* get a BUS */
 131     css_bus = virtual_css_bus_init();
 132     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
 133                       machine->initrd_filename, "s390-ccw.img",
 134                       "s390-netboot.img", true);
 135
 136     if (s390_has_feat(S390_FEAT_ZPCI)) {
 137         DeviceState *dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
 138         object_property_add_child(qdev_get_machine(),
 139                                   TYPE_S390_PCI_HOST_BRIDGE,
 140                                   OBJECT(dev), NULL);
 141         qdev_init_nofail(dev);
 142     }
 143
 144     /* register hypercalls */
 145     virtio_ccw_register_hcalls();
 146
 147     s390_enable_css_support(s390_cpu_addr2state(0));
 148     /*
 149      * Non mcss-e enabled guests only see the devices from the default
 150      * css, which is determined by the value of the squash_mcss property.
 151      * Note: we must not squash non virtual devices to css 0xFE.
 152      */
 153     if (css_bus->squash_mcss) {
 154         ret = css_create_css_image(0, true);
 155     } else {
 156         ret = css_create_css_image(VIRTUAL_CSSID, true);
 157     }
 158     assert(ret == 0);
 159
 160     /* Create VirtIO network adapters */
 161     s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
 162
 163     /* Register savevm handler for guest TOD clock */
 164     register_savevm_live(NULL, "todclock", 0, 1, &savevm_gtod, NULL);
 165 }
 166
 167 static void s390_cpu_plug(HotplugHandler *hotplug_dev,
 168                         DeviceState *dev, Error **errp)
 169 {
 170     gchar *name;
 171     S390CPU *cpu = S390_CPU(dev);
 172     CPUState *cs = CPU(dev);
 173
 174     name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
 175     object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
 176                              errp);
 177     g_free(name);
 178 }
 179
 180 static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
 181                                      DeviceState *dev, Error **errp)
 182 {
 183     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 184         s390_cpu_plug(hotplug_dev, dev, errp);
 185     }
 186 }
 187
 188 static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
 189                                                 DeviceState *dev)
 190 {
 191     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 192         return HOTPLUG_HANDLER(machine);
 193     }
 194     return NULL;
 195 }
 196
 197 static void s390_hot_add_cpu(const int64_t id, Error **errp)
 198 {
 199     MachineState *machine = MACHINE(qdev_get_machine());
 200
 201     s390x_new_cpu(machine->cpu_model, id, errp);
 202 }
 203
 204 static void ccw_machine_class_init(ObjectClass *oc, void *data)
 205 {
 206     MachineClass *mc = MACHINE_CLASS(oc);
 207     NMIClass *nc = NMI_CLASS(oc);
 208     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 209     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 210
 211     s390mc->ri_allowed = true;
 212     s390mc->cpu_model_allowed = true;
 213     s390mc->css_migration_enabled = true;
 214     s390mc->gs_allowed = true;
 215     mc->init = ccw_init;
 216     mc->reset = s390_machine_reset;
 217     mc->hot_add_cpu = s390_hot_add_cpu;
 218     mc->block_default_type = IF_VIRTIO;
 219     mc->no_cdrom = 1;
 220     mc->no_floppy = 1;
 221     mc->no_serial = 1;
 222     mc->no_parallel = 1;
 223     mc->no_sdcard = 1;
 224     mc->use_sclp = 1;
 225     mc->max_cpus = 248;
 226     mc->get_hotplug_handler = s390_get_hotplug_handler;
 227     hc->plug = s390_machine_device_plug;
 228     nc->nmi_monitor_handler = s390_nmi;
 229 }
 230
 231 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
 232 {
 233     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 234
 235     return ms->aes_key_wrap;
 236 }
 237
 238 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
 239                                             Error **errp)
 240 {
 241     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 242
 243     ms->aes_key_wrap = value;
 244 }
 245
 246 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
 247 {
 248     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 249
 250     return ms->dea_key_wrap;
 251 }
 252
 253 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
 254                                             Error **errp)
 255 {
 256     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 257
 258     ms->dea_key_wrap = value;
 259 }
 260
 261 static S390CcwMachineClass *current_mc;
 262
 263 static S390CcwMachineClass *get_machine_class(void)
 264 {
 265     if (unlikely(!current_mc)) {
 266         /*
 267         * No s390 ccw machine was instantiated, we are likely to
 268         * be called for the 'none' machine. The properties will
 269         * have their after-initialization values.
 270         */
 271         current_mc = S390_MACHINE_CLASS(
 272                      object_class_by_name(TYPE_S390_CCW_MACHINE));
 273     }
 274     return current_mc;
 275 }
 276
 277 bool ri_allowed(void)
 278 {
 279     /* for "none" machine this results in true */
 280     return get_machine_class()->ri_allowed;
 281 }
 282
 283 bool cpu_model_allowed(void)
 284 {
 285     /* for "none" machine this results in true */
 286     return get_machine_class()->cpu_model_allowed;
 287 }
 288
 289 bool gs_allowed(void)
 290 {
 291     /* for "none" machine this results in true */
 292     return get_machine_class()->gs_allowed;
 293 }
 294
 295 static char *machine_get_loadparm(Object *obj, Error **errp)
 296 {
 297     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 298
 299     return g_memdup(ms->loadparm, sizeof(ms->loadparm));
 300 }
 301
 302 static void machine_set_loadparm(Object *obj, const char *val, Error **errp)
 303 {
 304     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 305     int i;
 306
 307     for (i = 0; i < sizeof(ms->loadparm) && val[i]; i++) {
 308         uint8_t c = qemu_toupper(val[i]); /* mimic HMC */
 309
 310         if (('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || (c == '.') ||
 311             (c == ' ')) {
 312             ms->loadparm[i] = c;
 313         } else {
 314             error_setg(errp, "LOADPARM: invalid character '%c' (ASCII 0x%02x)",
 315                        c, c);
 316             return;
 317         }
 318     }
 319
 320     for (; i < sizeof(ms->loadparm); i++) {
 321         ms->loadparm[i] = ' '; /* pad right with spaces */
 322     }
 323 }
 324 static inline bool machine_get_squash_mcss(Object *obj, Error **errp)
 325 {
 326     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 327
 328     return ms->s390_squash_mcss;
 329 }
 330
 331 static inline void machine_set_squash_mcss(Object *obj, bool value,
 332                                            Error **errp)
 333 {
 334     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 335
 336     ms->s390_squash_mcss = value;
 337 }
 338
 339 static inline void s390_machine_initfn(Object *obj)
 340 {
 341     object_property_add_bool(obj, "aes-key-wrap",
 342                              machine_get_aes_key_wrap,
 343                              machine_set_aes_key_wrap, NULL);
 344     object_property_set_description(obj, "aes-key-wrap",
 345             "enable/disable AES key wrapping using the CPACF wrapping key",
 346             NULL);
 347     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 348
 349     object_property_add_bool(obj, "dea-key-wrap",
 350                              machine_get_dea_key_wrap,
 351                              machine_set_dea_key_wrap, NULL);
 352     object_property_set_description(obj, "dea-key-wrap",
 353             "enable/disable DEA key wrapping using the CPACF wrapping key",
 354             NULL);
 355     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 356     object_property_add_str(obj, "loadparm",
 357             machine_get_loadparm, machine_set_loadparm, NULL);
 358     object_property_set_description(obj, "loadparm",
 359             "Up to 8 chars in set of [A-Za-z0-9. ] (lower case chars converted"
 360             " to upper case) to pass to machine loader, boot manager,"
 361             " and guest kernel",
 362             NULL);
 363     object_property_add_bool(obj, "s390-squash-mcss",
 364                              machine_get_squash_mcss,
 365                              machine_set_squash_mcss, NULL);
 366     object_property_set_description(obj, "s390-squash-mcss",
 367             "enable/disable squashing subchannels into the default css",
 368             NULL);
 369     object_property_set_bool(obj, false, "s390-squash-mcss", NULL);
 370 }
 371
 372 static const TypeInfo ccw_machine_info = {
 373     .name          = TYPE_S390_CCW_MACHINE,
 374     .parent        = TYPE_MACHINE,
 375     .abstract      = true,
 376     .instance_size = sizeof(S390CcwMachineState),
 377     .instance_init = s390_machine_initfn,
 378     .class_size = sizeof(S390CcwMachineClass),
 379     .class_init    = ccw_machine_class_init,
 380     .interfaces = (InterfaceInfo[]) {
 381         { TYPE_NMI },
 382         { TYPE_HOTPLUG_HANDLER},
 383         { }
 384     },
 385 };
 386
 387 bool css_migration_enabled(void)
 388 {
 389     return get_machine_class()->css_migration_enabled;
 390 }
 391
 392 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 393     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 394                                                   void *data)                 \
 395     {                                                                         \
 396         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 397         ccw_machine_##suffix##_class_options(mc);                             \
 398         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 399         if (latest) {                                                         \
 400             mc->alias = "s390-ccw-virtio";                                    \
 401             mc->is_default = 1;                                               \
 402         }                                                                     \
 403     }                                                                         \
 404     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 405     {                                                                         \
 406         MachineState *machine = MACHINE(obj);                                 \
 407         current_mc = S390_MACHINE_CLASS(MACHINE_GET_CLASS(machine));          \
 408         ccw_machine_##suffix##_instance_options(machine);                     \
 409     }                                                                         \
 410     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 411         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 412         .parent = TYPE_S390_CCW_MACHINE,                                      \
 413         .class_init = ccw_machine_##suffix##_class_init,                      \
 414         .instance_init = ccw_machine_##suffix##_instance_init,                \
 415     };                                                                        \
 416     static void ccw_machine_register_##suffix(void)                           \
 417     {                                                                         \
 418         type_register_static(&ccw_machine_##suffix##_info);                   \
 419     }                                                                         \
 420     type_init(ccw_machine_register_##suffix)
 421
 422 #define CCW_COMPAT_2_10 \
 423         HW_COMPAT_2_10
 424
 425 #define CCW_COMPAT_2_9 \
 426         HW_COMPAT_2_9 \
 427         {\
 428             .driver   = TYPE_S390_STATTRIB,\
 429             .property = "migration-enabled",\
 430             .value    = "off",\
 431         },
 432
 433 #define CCW_COMPAT_2_8 \
 434         HW_COMPAT_2_8 \
 435         {\
 436             .driver   = TYPE_S390_FLIC_COMMON,\
 437             .property = "adapter_routes_max_batch",\
 438             .value    = "64",\
 439         },
 440
 441 #define CCW_COMPAT_2_7 \
 442         HW_COMPAT_2_7
 443
 444 #define CCW_COMPAT_2_6 \
 445         HW_COMPAT_2_6 \
 446         {\
 447             .driver   = TYPE_S390_IPL,\
 448             .property = "iplbext_migration",\
 449             .value    = "off",\
 450         }, {\
 451             .driver   = TYPE_VIRTUAL_CSS_BRIDGE,\
 452             .property = "css_dev_path",\
 453             .value    = "off",\
 454         },
 455
 456 #define CCW_COMPAT_2_5 \
 457         HW_COMPAT_2_5
 458
 459 #define CCW_COMPAT_2_4 \
 460         HW_COMPAT_2_4 \
 461         {\
 462             .driver   = TYPE_S390_SKEYS,\
 463             .property = "migration-enabled",\
 464             .value    = "off",\
 465         },{\
 466             .driver   = "virtio-blk-ccw",\
 467             .property = "max_revision",\
 468             .value    = "0",\
 469         },{\
 470             .driver   = "virtio-balloon-ccw",\
 471             .property = "max_revision",\
 472             .value    = "0",\
 473         },{\
 474             .driver   = "virtio-serial-ccw",\
 475             .property = "max_revision",\
 476             .value    = "0",\
 477         },{\
 478             .driver   = "virtio-9p-ccw",\
 479             .property = "max_revision",\
 480             .value    = "0",\
 481         },{\
 482             .driver   = "virtio-rng-ccw",\
 483             .property = "max_revision",\
 484             .value    = "0",\
 485         },{\
 486             .driver   = "virtio-net-ccw",\
 487             .property = "max_revision",\
 488             .value    = "0",\
 489         },{\
 490             .driver   = "virtio-scsi-ccw",\
 491             .property = "max_revision",\
 492             .value    = "0",\
 493         },{\
 494             .driver   = "vhost-scsi-ccw",\
 495             .property = "max_revision",\
 496             .value    = "0",\
 497         },
 498
 499 static void ccw_machine_2_11_instance_options(MachineState *machine)
 500 {
 501 }
 502
 503 static void ccw_machine_2_11_class_options(MachineClass *mc)
 504 {
 505 }
 506 DEFINE_CCW_MACHINE(2_11, "2.11", true);
 507
 508 static void ccw_machine_2_10_instance_options(MachineState *machine)
 509 {
 510     ccw_machine_2_11_instance_options(machine);
 511     if (css_migration_enabled()) {
 512         css_register_vmstate();
 513     }
 514 }
 515
 516 static void ccw_machine_2_10_class_options(MachineClass *mc)
 517 {
 518     ccw_machine_2_11_class_options(mc);
 519     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_10);
 520 }
 521 DEFINE_CCW_MACHINE(2_10, "2.10", false);
 522
 523 static void ccw_machine_2_9_instance_options(MachineState *machine)
 524 {
 525     ccw_machine_2_10_instance_options(machine);
 526     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ESOP);
 527     s390_cpudef_featoff_greater(12, 1, S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2);
 528     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ZPCI);
 529     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ADAPTER_INT_SUPPRESSION);
 530     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ADAPTER_EVENT_NOTIFICATION);
 531 }
 532
 533 static void ccw_machine_2_9_class_options(MachineClass *mc)
 534 {
 535     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 536
 537     s390mc->gs_allowed = false;
 538     ccw_machine_2_10_class_options(mc);
 539     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_9);
 540     s390mc->css_migration_enabled = false;
 541 }
 542 DEFINE_CCW_MACHINE(2_9, "2.9", false);
 543
 544 static void ccw_machine_2_8_instance_options(MachineState *machine)
 545 {
 546     ccw_machine_2_9_instance_options(machine);
 547 }
 548
 549 static void ccw_machine_2_8_class_options(MachineClass *mc)
 550 {
 551     ccw_machine_2_9_class_options(mc);
 552     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_8);
 553 }
 554 DEFINE_CCW_MACHINE(2_8, "2.8", false);
 555
 556 static void ccw_machine_2_7_instance_options(MachineState *machine)
 557 {
 558     ccw_machine_2_8_instance_options(machine);
 559 }
 560
 561 static void ccw_machine_2_7_class_options(MachineClass *mc)
 562 {
 563     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 564
 565     s390mc->cpu_model_allowed = false;
 566     ccw_machine_2_8_class_options(mc);
 567     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_7);
 568 }
 569 DEFINE_CCW_MACHINE(2_7, "2.7", false);
 570
 571 static void ccw_machine_2_6_instance_options(MachineState *machine)
 572 {
 573     ccw_machine_2_7_instance_options(machine);
 574 }
 575
 576 static void ccw_machine_2_6_class_options(MachineClass *mc)
 577 {
 578     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 579
 580     s390mc->ri_allowed = false;
 581     ccw_machine_2_7_class_options(mc);
 582     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_6);
 583 }
 584 DEFINE_CCW_MACHINE(2_6, "2.6", false);
 585
 586 static void ccw_machine_2_5_instance_options(MachineState *machine)
 587 {
 588     ccw_machine_2_6_instance_options(machine);
 589 }
 590
 591 static void ccw_machine_2_5_class_options(MachineClass *mc)
 592 {
 593     ccw_machine_2_6_class_options(mc);
 594     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 595 }
 596 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 597
 598 static void ccw_machine_2_4_instance_options(MachineState *machine)
 599 {
 600     ccw_machine_2_5_instance_options(machine);
 601 }
 602
 603 static void ccw_machine_2_4_class_options(MachineClass *mc)
 604 {
 605     ccw_machine_2_5_class_options(mc);
 606     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 607 }
 608 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 609
 610 static void ccw_machine_register_types(void)
 611 {
 612     type_register_static(&ccw_machine_info);
 613 }
 614
 615 type_init(ccw_machine_register_types)