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     DeviceState *dev;
 122
 123     s390_sclp_init();
 124     s390_memory_init(machine->ram_size);
 125
 126     /* init CPUs */
 127     s390_init_cpus(machine);
 128
 129     s390_flic_init();
 130
 131     /* get a BUS */
 132     css_bus = virtual_css_bus_init();
 133     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
 134                       machine->initrd_filename, "s390-ccw.img",
 135                       "s390-netboot.img", true);
 136
 137     dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
 138     object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
 139                               OBJECT(dev), NULL);
 140     qdev_init_nofail(dev);
 141
 142     /* register hypercalls */
 143     virtio_ccw_register_hcalls();
 144
 145     if (kvm_enabled()) {
 146         kvm_s390_enable_css_support(s390_cpu_addr2state(0));
 147     }
 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, kvm_state);
 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     if (!kvm_enabled()) {
 280         return false;
 281     }
 282     /* for "none" machine this results in true */
 283     return get_machine_class()->ri_allowed;
 284 }
 285
 286 bool cpu_model_allowed(void)
 287 {
 288     /* for "none" machine this results in true */
 289     return get_machine_class()->cpu_model_allowed;
 290 }
 291
 292 bool gs_allowed(void)
 293 {
 294     if (kvm_enabled()) {
 295         MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
 296         if (object_class_dynamic_cast(OBJECT_CLASS(mc),
 297                                       TYPE_S390_CCW_MACHINE)) {
 298             S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 299
 300             return s390mc->gs_allowed;
 301         }
 302         /* Make sure the "none" machine can have gs */
 303         return true;
 304     }
 305     return false;
 306 }
 307
 308 static char *machine_get_loadparm(Object *obj, Error **errp)
 309 {
 310     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 311
 312     return g_memdup(ms->loadparm, sizeof(ms->loadparm));
 313 }
 314
 315 static void machine_set_loadparm(Object *obj, const char *val, Error **errp)
 316 {
 317     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 318     int i;
 319
 320     for (i = 0; i < sizeof(ms->loadparm) && val[i]; i++) {
 321         uint8_t c = qemu_toupper(val[i]); /* mimic HMC */
 322
 323         if (('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || (c == '.') ||
 324             (c == ' ')) {
 325             ms->loadparm[i] = c;
 326         } else {
 327             error_setg(errp, "LOADPARM: invalid character '%c' (ASCII 0x%02x)",
 328                        c, c);
 329             return;
 330         }
 331     }
 332
 333     for (; i < sizeof(ms->loadparm); i++) {
 334         ms->loadparm[i] = ' '; /* pad right with spaces */
 335     }
 336 }
 337 static inline bool machine_get_squash_mcss(Object *obj, Error **errp)
 338 {
 339     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 340
 341     return ms->s390_squash_mcss;
 342 }
 343
 344 static inline void machine_set_squash_mcss(Object *obj, bool value,
 345                                            Error **errp)
 346 {
 347     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 348
 349     ms->s390_squash_mcss = value;
 350 }
 351
 352 static inline void s390_machine_initfn(Object *obj)
 353 {
 354     object_property_add_bool(obj, "aes-key-wrap",
 355                              machine_get_aes_key_wrap,
 356                              machine_set_aes_key_wrap, NULL);
 357     object_property_set_description(obj, "aes-key-wrap",
 358             "enable/disable AES key wrapping using the CPACF wrapping key",
 359             NULL);
 360     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 361
 362     object_property_add_bool(obj, "dea-key-wrap",
 363                              machine_get_dea_key_wrap,
 364                              machine_set_dea_key_wrap, NULL);
 365     object_property_set_description(obj, "dea-key-wrap",
 366             "enable/disable DEA key wrapping using the CPACF wrapping key",
 367             NULL);
 368     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 369     object_property_add_str(obj, "loadparm",
 370             machine_get_loadparm, machine_set_loadparm, NULL);
 371     object_property_set_description(obj, "loadparm",
 372             "Up to 8 chars in set of [A-Za-z0-9. ] (lower case chars converted"
 373             " to upper case) to pass to machine loader, boot manager,"
 374             " and guest kernel",
 375             NULL);
 376     object_property_add_bool(obj, "s390-squash-mcss",
 377                              machine_get_squash_mcss,
 378                              machine_set_squash_mcss, NULL);
 379     object_property_set_description(obj, "s390-squash-mcss",
 380             "enable/disable squashing subchannels into the default css",
 381             NULL);
 382     object_property_set_bool(obj, false, "s390-squash-mcss", NULL);
 383 }
 384
 385 static const TypeInfo ccw_machine_info = {
 386     .name          = TYPE_S390_CCW_MACHINE,
 387     .parent        = TYPE_MACHINE,
 388     .abstract      = true,
 389     .instance_size = sizeof(S390CcwMachineState),
 390     .instance_init = s390_machine_initfn,
 391     .class_size = sizeof(S390CcwMachineClass),
 392     .class_init    = ccw_machine_class_init,
 393     .interfaces = (InterfaceInfo[]) {
 394         { TYPE_NMI },
 395         { TYPE_HOTPLUG_HANDLER},
 396         { }
 397     },
 398 };
 399
 400 bool css_migration_enabled(void)
 401 {
 402     return get_machine_class()->css_migration_enabled;
 403 }
 404
 405 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 406     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 407                                                   void *data)                 \
 408     {                                                                         \
 409         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 410         ccw_machine_##suffix##_class_options(mc);                             \
 411         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 412         if (latest) {                                                         \
 413             mc->alias = "s390-ccw-virtio";                                    \
 414             mc->is_default = 1;                                               \
 415         }                                                                     \
 416     }                                                                         \
 417     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 418     {                                                                         \
 419         MachineState *machine = MACHINE(obj);                                 \
 420         current_mc = S390_MACHINE_CLASS(MACHINE_GET_CLASS(machine));          \
 421         ccw_machine_##suffix##_instance_options(machine);                     \
 422     }                                                                         \
 423     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 424         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 425         .parent = TYPE_S390_CCW_MACHINE,                                      \
 426         .class_init = ccw_machine_##suffix##_class_init,                      \
 427         .instance_init = ccw_machine_##suffix##_instance_init,                \
 428     };                                                                        \
 429     static void ccw_machine_register_##suffix(void)                           \
 430     {                                                                         \
 431         type_register_static(&ccw_machine_##suffix##_info);                   \
 432     }                                                                         \
 433     type_init(ccw_machine_register_##suffix)
 434
 435 #define CCW_COMPAT_2_9 \
 436         HW_COMPAT_2_9 \
 437         {\
 438             .driver   = TYPE_S390_STATTRIB,\
 439             .property = "migration-enabled",\
 440             .value    = "off",\
 441         },
 442
 443 #define CCW_COMPAT_2_8 \
 444         HW_COMPAT_2_8 \
 445         {\
 446             .driver   = TYPE_S390_FLIC_COMMON,\
 447             .property = "adapter_routes_max_batch",\
 448             .value    = "64",\
 449         },
 450
 451 #define CCW_COMPAT_2_7 \
 452         HW_COMPAT_2_7
 453
 454 #define CCW_COMPAT_2_6 \
 455         HW_COMPAT_2_6 \
 456         {\
 457             .driver   = TYPE_S390_IPL,\
 458             .property = "iplbext_migration",\
 459             .value    = "off",\
 460         }, {\
 461             .driver   = TYPE_VIRTUAL_CSS_BRIDGE,\
 462             .property = "css_dev_path",\
 463             .value    = "off",\
 464         },
 465
 466 #define CCW_COMPAT_2_5 \
 467         HW_COMPAT_2_5
 468
 469 #define CCW_COMPAT_2_4 \
 470         HW_COMPAT_2_4 \
 471         {\
 472             .driver   = TYPE_S390_SKEYS,\
 473             .property = "migration-enabled",\
 474             .value    = "off",\
 475         },{\
 476             .driver   = "virtio-blk-ccw",\
 477             .property = "max_revision",\
 478             .value    = "0",\
 479         },{\
 480             .driver   = "virtio-balloon-ccw",\
 481             .property = "max_revision",\
 482             .value    = "0",\
 483         },{\
 484             .driver   = "virtio-serial-ccw",\
 485             .property = "max_revision",\
 486             .value    = "0",\
 487         },{\
 488             .driver   = "virtio-9p-ccw",\
 489             .property = "max_revision",\
 490             .value    = "0",\
 491         },{\
 492             .driver   = "virtio-rng-ccw",\
 493             .property = "max_revision",\
 494             .value    = "0",\
 495         },{\
 496             .driver   = "virtio-net-ccw",\
 497             .property = "max_revision",\
 498             .value    = "0",\
 499         },{\
 500             .driver   = "virtio-scsi-ccw",\
 501             .property = "max_revision",\
 502             .value    = "0",\
 503         },{\
 504             .driver   = "vhost-scsi-ccw",\
 505             .property = "max_revision",\
 506             .value    = "0",\
 507         },
 508
 509 static void ccw_machine_2_10_instance_options(MachineState *machine)
 510 {
 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 }
 519 DEFINE_CCW_MACHINE(2_10, "2.10", true);
 520
 521 static void ccw_machine_2_9_instance_options(MachineState *machine)
 522 {
 523     ccw_machine_2_10_instance_options(machine);
 524     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ESOP);
 525     s390_cpudef_featoff_greater(12, 1, S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2);
 526     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ZPCI);
 527     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ADAPTER_INT_SUPPRESSION);
 528     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ADAPTER_EVENT_NOTIFICATION);
 529 }
 530
 531 static void ccw_machine_2_9_class_options(MachineClass *mc)
 532 {
 533     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 534
 535     s390mc->gs_allowed = false;
 536     ccw_machine_2_10_class_options(mc);
 537     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_9);
 538     s390mc->css_migration_enabled = false;
 539 }
 540 DEFINE_CCW_MACHINE(2_9, "2.9", false);
 541
 542 static void ccw_machine_2_8_instance_options(MachineState *machine)
 543 {
 544     ccw_machine_2_9_instance_options(machine);
 545 }
 546
 547 static void ccw_machine_2_8_class_options(MachineClass *mc)
 548 {
 549     ccw_machine_2_9_class_options(mc);
 550     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_8);
 551 }
 552 DEFINE_CCW_MACHINE(2_8, "2.8", false);
 553
 554 static void ccw_machine_2_7_instance_options(MachineState *machine)
 555 {
 556     ccw_machine_2_8_instance_options(machine);
 557 }
 558
 559 static void ccw_machine_2_7_class_options(MachineClass *mc)
 560 {
 561     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 562
 563     s390mc->cpu_model_allowed = false;
 564     ccw_machine_2_8_class_options(mc);
 565     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_7);
 566 }
 567 DEFINE_CCW_MACHINE(2_7, "2.7", false);
 568
 569 static void ccw_machine_2_6_instance_options(MachineState *machine)
 570 {
 571     ccw_machine_2_7_instance_options(machine);
 572 }
 573
 574 static void ccw_machine_2_6_class_options(MachineClass *mc)
 575 {
 576     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 577
 578     s390mc->ri_allowed = false;
 579     ccw_machine_2_7_class_options(mc);
 580     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_6);
 581 }
 582 DEFINE_CCW_MACHINE(2_6, "2.6", false);
 583
 584 static void ccw_machine_2_5_instance_options(MachineState *machine)
 585 {
 586     ccw_machine_2_6_instance_options(machine);
 587 }
 588
 589 static void ccw_machine_2_5_class_options(MachineClass *mc)
 590 {
 591     ccw_machine_2_6_class_options(mc);
 592     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 593 }
 594 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 595
 596 static void ccw_machine_2_4_instance_options(MachineState *machine)
 597 {
 598     ccw_machine_2_5_instance_options(machine);
 599 }
 600
 601 static void ccw_machine_2_4_class_options(MachineClass *mc)
 602 {
 603     ccw_machine_2_5_class_options(mc);
 604     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 605 }
 606 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 607
 608 static void ccw_machine_register_types(void)
 609 {
 610     type_register_static(&ccw_machine_info);
 611 }
 612
 613 type_init(ccw_machine_register_types)