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     if (kvm_enabled()) {
 148         kvm_s390_enable_css_support(s390_cpu_addr2state(0));
 149     }
 150     /*
 151      * Non mcss-e enabled guests only see the devices from the default
 152      * css, which is determined by the value of the squash_mcss property.
 153      * Note: we must not squash non virtual devices to css 0xFE.
 154      */
 155     if (css_bus->squash_mcss) {
 156         ret = css_create_css_image(0, true);
 157     } else {
 158         ret = css_create_css_image(VIRTUAL_CSSID, true);
 159     }
 160     assert(ret == 0);
 161
 162     /* Create VirtIO network adapters */
 163     s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
 164
 165     /* Register savevm handler for guest TOD clock */
 166     register_savevm_live(NULL, "todclock", 0, 1, &savevm_gtod, kvm_state);
 167 }
 168
 169 static void s390_cpu_plug(HotplugHandler *hotplug_dev,
 170                         DeviceState *dev, Error **errp)
 171 {
 172     gchar *name;
 173     S390CPU *cpu = S390_CPU(dev);
 174     CPUState *cs = CPU(dev);
 175
 176     name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
 177     object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
 178                              errp);
 179     g_free(name);
 180 }
 181
 182 static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
 183                                      DeviceState *dev, Error **errp)
 184 {
 185     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 186         s390_cpu_plug(hotplug_dev, dev, errp);
 187     }
 188 }
 189
 190 static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
 191                                                 DeviceState *dev)
 192 {
 193     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 194         return HOTPLUG_HANDLER(machine);
 195     }
 196     return NULL;
 197 }
 198
 199 static void s390_hot_add_cpu(const int64_t id, Error **errp)
 200 {
 201     MachineState *machine = MACHINE(qdev_get_machine());
 202
 203     s390x_new_cpu(machine->cpu_model, id, errp);
 204 }
 205
 206 static void ccw_machine_class_init(ObjectClass *oc, void *data)
 207 {
 208     MachineClass *mc = MACHINE_CLASS(oc);
 209     NMIClass *nc = NMI_CLASS(oc);
 210     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 211     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 212
 213     s390mc->ri_allowed = true;
 214     s390mc->cpu_model_allowed = true;
 215     s390mc->css_migration_enabled = true;
 216     s390mc->gs_allowed = true;
 217     mc->init = ccw_init;
 218     mc->reset = s390_machine_reset;
 219     mc->hot_add_cpu = s390_hot_add_cpu;
 220     mc->block_default_type = IF_VIRTIO;
 221     mc->no_cdrom = 1;
 222     mc->no_floppy = 1;
 223     mc->no_serial = 1;
 224     mc->no_parallel = 1;
 225     mc->no_sdcard = 1;
 226     mc->use_sclp = 1;
 227     mc->max_cpus = 248;
 228     mc->get_hotplug_handler = s390_get_hotplug_handler;
 229     hc->plug = s390_machine_device_plug;
 230     nc->nmi_monitor_handler = s390_nmi;
 231 }
 232
 233 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
 234 {
 235     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 236
 237     return ms->aes_key_wrap;
 238 }
 239
 240 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
 241                                             Error **errp)
 242 {
 243     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 244
 245     ms->aes_key_wrap = value;
 246 }
 247
 248 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
 249 {
 250     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 251
 252     return ms->dea_key_wrap;
 253 }
 254
 255 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
 256                                             Error **errp)
 257 {
 258     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 259
 260     ms->dea_key_wrap = value;
 261 }
 262
 263 static S390CcwMachineClass *current_mc;
 264
 265 static S390CcwMachineClass *get_machine_class(void)
 266 {
 267     if (unlikely(!current_mc)) {
 268         /*
 269         * No s390 ccw machine was instantiated, we are likely to
 270         * be called for the 'none' machine. The properties will
 271         * have their after-initialization values.
 272         */
 273         current_mc = S390_MACHINE_CLASS(
 274                      object_class_by_name(TYPE_S390_CCW_MACHINE));
 275     }
 276     return current_mc;
 277 }
 278
 279 bool ri_allowed(void)
 280 {
 281     if (!kvm_enabled()) {
 282         return false;
 283     }
 284     /* for "none" machine this results in true */
 285     return get_machine_class()->ri_allowed;
 286 }
 287
 288 bool cpu_model_allowed(void)
 289 {
 290     /* for "none" machine this results in true */
 291     return get_machine_class()->cpu_model_allowed;
 292 }
 293
 294 bool gs_allowed(void)
 295 {
 296     if (kvm_enabled()) {
 297         MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
 298         if (object_class_dynamic_cast(OBJECT_CLASS(mc),
 299                                       TYPE_S390_CCW_MACHINE)) {
 300             S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 301
 302             return s390mc->gs_allowed;
 303         }
 304         /* Make sure the "none" machine can have gs */
 305         return true;
 306     }
 307     return false;
 308 }
 309
 310 static char *machine_get_loadparm(Object *obj, Error **errp)
 311 {
 312     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 313
 314     return g_memdup(ms->loadparm, sizeof(ms->loadparm));
 315 }
 316
 317 static void machine_set_loadparm(Object *obj, const char *val, Error **errp)
 318 {
 319     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 320     int i;
 321
 322     for (i = 0; i < sizeof(ms->loadparm) && val[i]; i++) {
 323         uint8_t c = qemu_toupper(val[i]); /* mimic HMC */
 324
 325         if (('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || (c == '.') ||
 326             (c == ' ')) {
 327             ms->loadparm[i] = c;
 328         } else {
 329             error_setg(errp, "LOADPARM: invalid character '%c' (ASCII 0x%02x)",
 330                        c, c);
 331             return;
 332         }
 333     }
 334
 335     for (; i < sizeof(ms->loadparm); i++) {
 336         ms->loadparm[i] = ' '; /* pad right with spaces */
 337     }
 338 }
 339 static inline bool machine_get_squash_mcss(Object *obj, Error **errp)
 340 {
 341     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 342
 343     return ms->s390_squash_mcss;
 344 }
 345
 346 static inline void machine_set_squash_mcss(Object *obj, bool value,
 347                                            Error **errp)
 348 {
 349     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 350
 351     ms->s390_squash_mcss = value;
 352 }
 353
 354 static inline void s390_machine_initfn(Object *obj)
 355 {
 356     object_property_add_bool(obj, "aes-key-wrap",
 357                              machine_get_aes_key_wrap,
 358                              machine_set_aes_key_wrap, NULL);
 359     object_property_set_description(obj, "aes-key-wrap",
 360             "enable/disable AES key wrapping using the CPACF wrapping key",
 361             NULL);
 362     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 363
 364     object_property_add_bool(obj, "dea-key-wrap",
 365                              machine_get_dea_key_wrap,
 366                              machine_set_dea_key_wrap, NULL);
 367     object_property_set_description(obj, "dea-key-wrap",
 368             "enable/disable DEA key wrapping using the CPACF wrapping key",
 369             NULL);
 370     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 371     object_property_add_str(obj, "loadparm",
 372             machine_get_loadparm, machine_set_loadparm, NULL);
 373     object_property_set_description(obj, "loadparm",
 374             "Up to 8 chars in set of [A-Za-z0-9. ] (lower case chars converted"
 375             " to upper case) to pass to machine loader, boot manager,"
 376             " and guest kernel",
 377             NULL);
 378     object_property_add_bool(obj, "s390-squash-mcss",
 379                              machine_get_squash_mcss,
 380                              machine_set_squash_mcss, NULL);
 381     object_property_set_description(obj, "s390-squash-mcss",
 382             "enable/disable squashing subchannels into the default css",
 383             NULL);
 384     object_property_set_bool(obj, false, "s390-squash-mcss", NULL);
 385 }
 386
 387 static const TypeInfo ccw_machine_info = {
 388     .name          = TYPE_S390_CCW_MACHINE,
 389     .parent        = TYPE_MACHINE,
 390     .abstract      = true,
 391     .instance_size = sizeof(S390CcwMachineState),
 392     .instance_init = s390_machine_initfn,
 393     .class_size = sizeof(S390CcwMachineClass),
 394     .class_init    = ccw_machine_class_init,
 395     .interfaces = (InterfaceInfo[]) {
 396         { TYPE_NMI },
 397         { TYPE_HOTPLUG_HANDLER},
 398         { }
 399     },
 400 };
 401
 402 bool css_migration_enabled(void)
 403 {
 404     return get_machine_class()->css_migration_enabled;
 405 }
 406
 407 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 408     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 409                                                   void *data)                 \
 410     {                                                                         \
 411         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 412         ccw_machine_##suffix##_class_options(mc);                             \
 413         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 414         if (latest) {                                                         \
 415             mc->alias = "s390-ccw-virtio";                                    \
 416             mc->is_default = 1;                                               \
 417         }                                                                     \
 418     }                                                                         \
 419     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 420     {                                                                         \
 421         MachineState *machine = MACHINE(obj);                                 \
 422         current_mc = S390_MACHINE_CLASS(MACHINE_GET_CLASS(machine));          \
 423         ccw_machine_##suffix##_instance_options(machine);                     \
 424     }                                                                         \
 425     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 426         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 427         .parent = TYPE_S390_CCW_MACHINE,                                      \
 428         .class_init = ccw_machine_##suffix##_class_init,                      \
 429         .instance_init = ccw_machine_##suffix##_instance_init,                \
 430     };                                                                        \
 431     static void ccw_machine_register_##suffix(void)                           \
 432     {                                                                         \
 433         type_register_static(&ccw_machine_##suffix##_info);                   \
 434     }                                                                         \
 435     type_init(ccw_machine_register_##suffix)
 436
 437 #define CCW_COMPAT_2_10 \
 438         HW_COMPAT_2_10
 439
 440 #define CCW_COMPAT_2_9 \
 441         HW_COMPAT_2_9 \
 442         {\
 443             .driver   = TYPE_S390_STATTRIB,\
 444             .property = "migration-enabled",\
 445             .value    = "off",\
 446         },
 447
 448 #define CCW_COMPAT_2_8 \
 449         HW_COMPAT_2_8 \
 450         {\
 451             .driver   = TYPE_S390_FLIC_COMMON,\
 452             .property = "adapter_routes_max_batch",\
 453             .value    = "64",\
 454         },
 455
 456 #define CCW_COMPAT_2_7 \
 457         HW_COMPAT_2_7
 458
 459 #define CCW_COMPAT_2_6 \
 460         HW_COMPAT_2_6 \
 461         {\
 462             .driver   = TYPE_S390_IPL,\
 463             .property = "iplbext_migration",\
 464             .value    = "off",\
 465         }, {\
 466             .driver   = TYPE_VIRTUAL_CSS_BRIDGE,\
 467             .property = "css_dev_path",\
 468             .value    = "off",\
 469         },
 470
 471 #define CCW_COMPAT_2_5 \
 472         HW_COMPAT_2_5
 473
 474 #define CCW_COMPAT_2_4 \
 475         HW_COMPAT_2_4 \
 476         {\
 477             .driver   = TYPE_S390_SKEYS,\
 478             .property = "migration-enabled",\
 479             .value    = "off",\
 480         },{\
 481             .driver   = "virtio-blk-ccw",\
 482             .property = "max_revision",\
 483             .value    = "0",\
 484         },{\
 485             .driver   = "virtio-balloon-ccw",\
 486             .property = "max_revision",\
 487             .value    = "0",\
 488         },{\
 489             .driver   = "virtio-serial-ccw",\
 490             .property = "max_revision",\
 491             .value    = "0",\
 492         },{\
 493             .driver   = "virtio-9p-ccw",\
 494             .property = "max_revision",\
 495             .value    = "0",\
 496         },{\
 497             .driver   = "virtio-rng-ccw",\
 498             .property = "max_revision",\
 499             .value    = "0",\
 500         },{\
 501             .driver   = "virtio-net-ccw",\
 502             .property = "max_revision",\
 503             .value    = "0",\
 504         },{\
 505             .driver   = "virtio-scsi-ccw",\
 506             .property = "max_revision",\
 507             .value    = "0",\
 508         },{\
 509             .driver   = "vhost-scsi-ccw",\
 510             .property = "max_revision",\
 511             .value    = "0",\
 512         },
 513
 514 static void ccw_machine_2_11_instance_options(MachineState *machine)
 515 {
 516 }
 517
 518 static void ccw_machine_2_11_class_options(MachineClass *mc)
 519 {
 520 }
 521 DEFINE_CCW_MACHINE(2_11, "2.11", true);
 522
 523 static void ccw_machine_2_10_instance_options(MachineState *machine)
 524 {
 525     ccw_machine_2_11_instance_options(machine);
 526     if (css_migration_enabled()) {
 527         css_register_vmstate();
 528     }
 529 }
 530
 531 static void ccw_machine_2_10_class_options(MachineClass *mc)
 532 {
 533     ccw_machine_2_11_class_options(mc);
 534     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_10);
 535 }
 536 DEFINE_CCW_MACHINE(2_10, "2.10", false);
 537
 538 static void ccw_machine_2_9_instance_options(MachineState *machine)
 539 {
 540     ccw_machine_2_10_instance_options(machine);
 541     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ESOP);
 542     s390_cpudef_featoff_greater(12, 1, S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2);
 543     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ZPCI);
 544     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ADAPTER_INT_SUPPRESSION);
 545     s390_cpudef_featoff_greater(12, 1, S390_FEAT_ADAPTER_EVENT_NOTIFICATION);
 546 }
 547
 548 static void ccw_machine_2_9_class_options(MachineClass *mc)
 549 {
 550     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 551
 552     s390mc->gs_allowed = false;
 553     ccw_machine_2_10_class_options(mc);
 554     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_9);
 555     s390mc->css_migration_enabled = false;
 556 }
 557 DEFINE_CCW_MACHINE(2_9, "2.9", false);
 558
 559 static void ccw_machine_2_8_instance_options(MachineState *machine)
 560 {
 561     ccw_machine_2_9_instance_options(machine);
 562 }
 563
 564 static void ccw_machine_2_8_class_options(MachineClass *mc)
 565 {
 566     ccw_machine_2_9_class_options(mc);
 567     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_8);
 568 }
 569 DEFINE_CCW_MACHINE(2_8, "2.8", false);
 570
 571 static void ccw_machine_2_7_instance_options(MachineState *machine)
 572 {
 573     ccw_machine_2_8_instance_options(machine);
 574 }
 575
 576 static void ccw_machine_2_7_class_options(MachineClass *mc)
 577 {
 578     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 579
 580     s390mc->cpu_model_allowed = false;
 581     ccw_machine_2_8_class_options(mc);
 582     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_7);
 583 }
 584 DEFINE_CCW_MACHINE(2_7, "2.7", false);
 585
 586 static void ccw_machine_2_6_instance_options(MachineState *machine)
 587 {
 588     ccw_machine_2_7_instance_options(machine);
 589 }
 590
 591 static void ccw_machine_2_6_class_options(MachineClass *mc)
 592 {
 593     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 594
 595     s390mc->ri_allowed = false;
 596     ccw_machine_2_7_class_options(mc);
 597     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_6);
 598 }
 599 DEFINE_CCW_MACHINE(2_6, "2.6", false);
 600
 601 static void ccw_machine_2_5_instance_options(MachineState *machine)
 602 {
 603     ccw_machine_2_6_instance_options(machine);
 604 }
 605
 606 static void ccw_machine_2_5_class_options(MachineClass *mc)
 607 {
 608     ccw_machine_2_6_class_options(mc);
 609     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 610 }
 611 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 612
 613 static void ccw_machine_2_4_instance_options(MachineState *machine)
 614 {
 615     ccw_machine_2_5_instance_options(machine);
 616 }
 617
 618 static void ccw_machine_2_4_class_options(MachineClass *mc)
 619 {
 620     ccw_machine_2_5_class_options(mc);
 621     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 622 }
 623 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 624
 625 static void ccw_machine_register_types(void)
 626 {
 627     type_register_static(&ccw_machine_info);
 628 }
 629
 630 type_init(ccw_machine_register_types)