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