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/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      * Create virtual css and set it as default so that non mcss-e
 140      * enabled guests only see virtio devices.
 141      */
 142     ret = css_create_css_image(VIRTUAL_CSSID, true);
 143     assert(ret == 0);
 144
 145     /* Create VirtIO network adapters */
 146     s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
 147
 148     /* Register savevm handler for guest TOD clock */
 149     register_savevm(NULL, "todclock", 0, 1,
 150                     gtod_save, gtod_load, kvm_state);
 151 }
 152
 153 static void s390_cpu_plug(HotplugHandler *hotplug_dev,
 154                         DeviceState *dev, Error **errp)
 155 {
 156     gchar *name;
 157     S390CPU *cpu = S390_CPU(dev);
 158     CPUState *cs = CPU(dev);
 159
 160     name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
 161     object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
 162                              errp);
 163     g_free(name);
 164 }
 165
 166 static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
 167                                      DeviceState *dev, Error **errp)
 168 {
 169     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 170         s390_cpu_plug(hotplug_dev, dev, errp);
 171     }
 172 }
 173
 174 static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
 175                                                 DeviceState *dev)
 176 {
 177     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 178         return HOTPLUG_HANDLER(machine);
 179     }
 180     return NULL;
 181 }
 182
 183 static void s390_hot_add_cpu(const int64_t id, Error **errp)
 184 {
 185     MachineState *machine = MACHINE(qdev_get_machine());
 186
 187     s390x_new_cpu(machine->cpu_model, id, errp);
 188 }
 189
 190 static void ccw_machine_class_init(ObjectClass *oc, void *data)
 191 {
 192     MachineClass *mc = MACHINE_CLASS(oc);
 193     NMIClass *nc = NMI_CLASS(oc);
 194     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 195     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 196
 197     s390mc->ri_allowed = true;
 198     s390mc->cpu_model_allowed = true;
 199     mc->init = ccw_init;
 200     mc->reset = s390_machine_reset;
 201     mc->hot_add_cpu = s390_hot_add_cpu;
 202     mc->block_default_type = IF_VIRTIO;
 203     mc->no_cdrom = 1;
 204     mc->no_floppy = 1;
 205     mc->no_serial = 1;
 206     mc->no_parallel = 1;
 207     mc->no_sdcard = 1;
 208     mc->use_sclp = 1;
 209     mc->max_cpus = 248;
 210     mc->get_hotplug_handler = s390_get_hotplug_handler;
 211     hc->plug = s390_machine_device_plug;
 212     nc->nmi_monitor_handler = s390_nmi;
 213 }
 214
 215 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
 216 {
 217     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 218
 219     return ms->aes_key_wrap;
 220 }
 221
 222 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
 223                                             Error **errp)
 224 {
 225     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 226
 227     ms->aes_key_wrap = value;
 228 }
 229
 230 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
 231 {
 232     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 233
 234     return ms->dea_key_wrap;
 235 }
 236
 237 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
 238                                             Error **errp)
 239 {
 240     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 241
 242     ms->dea_key_wrap = value;
 243 }
 244
 245 bool ri_allowed(void)
 246 {
 247     if (kvm_enabled()) {
 248         MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
 249         if (object_class_dynamic_cast(OBJECT_CLASS(mc),
 250                                       TYPE_S390_CCW_MACHINE)) {
 251             S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 252
 253             return s390mc->ri_allowed;
 254         }
 255         /*
 256          * Make sure the "none" machine can have ri, otherwise it won't * be
 257          * unlocked in KVM and therefore the host CPU model might be wrong.
 258          */
 259         return true;
 260     }
 261     return 0;
 262 }
 263
 264 bool cpu_model_allowed(void)
 265 {
 266     MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
 267     if (object_class_dynamic_cast(OBJECT_CLASS(mc),
 268                                   TYPE_S390_CCW_MACHINE)) {
 269         S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 270
 271         return s390mc->cpu_model_allowed;
 272     }
 273     /* allow CPU model qmp queries with the "none" machine */
 274     return true;
 275 }
 276
 277 static inline void s390_machine_initfn(Object *obj)
 278 {
 279     object_property_add_bool(obj, "aes-key-wrap",
 280                              machine_get_aes_key_wrap,
 281                              machine_set_aes_key_wrap, NULL);
 282     object_property_set_description(obj, "aes-key-wrap",
 283             "enable/disable AES key wrapping using the CPACF wrapping key",
 284             NULL);
 285     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 286
 287     object_property_add_bool(obj, "dea-key-wrap",
 288                              machine_get_dea_key_wrap,
 289                              machine_set_dea_key_wrap, NULL);
 290     object_property_set_description(obj, "dea-key-wrap",
 291             "enable/disable DEA key wrapping using the CPACF wrapping key",
 292             NULL);
 293     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 294 }
 295
 296 static const TypeInfo ccw_machine_info = {
 297     .name          = TYPE_S390_CCW_MACHINE,
 298     .parent        = TYPE_MACHINE,
 299     .abstract      = true,
 300     .instance_size = sizeof(S390CcwMachineState),
 301     .instance_init = s390_machine_initfn,
 302     .class_size = sizeof(S390CcwMachineClass),
 303     .class_init    = ccw_machine_class_init,
 304     .interfaces = (InterfaceInfo[]) {
 305         { TYPE_NMI },
 306         { TYPE_HOTPLUG_HANDLER},
 307         { }
 308     },
 309 };
 310
 311 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 312     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 313                                                   void *data)                 \
 314     {                                                                         \
 315         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 316         ccw_machine_##suffix##_class_options(mc);                             \
 317         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 318         if (latest) {                                                         \
 319             mc->alias = "s390-ccw-virtio";                                    \
 320             mc->is_default = 1;                                               \
 321         }                                                                     \
 322     }                                                                         \
 323     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 324     {                                                                         \
 325         MachineState *machine = MACHINE(obj);                                 \
 326         ccw_machine_##suffix##_instance_options(machine);                     \
 327     }                                                                         \
 328     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 329         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 330         .parent = TYPE_S390_CCW_MACHINE,                                      \
 331         .class_init = ccw_machine_##suffix##_class_init,                      \
 332         .instance_init = ccw_machine_##suffix##_instance_init,                \
 333     };                                                                        \
 334     static void ccw_machine_register_##suffix(void)                           \
 335     {                                                                         \
 336         type_register_static(&ccw_machine_##suffix##_info);                   \
 337     }                                                                         \
 338     type_init(ccw_machine_register_##suffix)
 339
 340 #define CCW_COMPAT_2_9 \
 341         HW_COMPAT_2_9
 342
 343 #define CCW_COMPAT_2_8 \
 344         HW_COMPAT_2_8 \
 345         {\
 346             .driver   = TYPE_S390_FLIC_COMMON,\
 347             .property = "adapter_routes_max_batch",\
 348             .value    = "64",\
 349         },
 350
 351 #define CCW_COMPAT_2_7 \
 352         HW_COMPAT_2_7
 353
 354 #define CCW_COMPAT_2_6 \
 355         HW_COMPAT_2_6 \
 356         {\
 357             .driver   = TYPE_S390_IPL,\
 358             .property = "iplbext_migration",\
 359             .value    = "off",\
 360         }, {\
 361             .driver   = TYPE_VIRTUAL_CSS_BRIDGE,\
 362             .property = "css_dev_path",\
 363             .value    = "off",\
 364         },
 365
 366 #define CCW_COMPAT_2_5 \
 367         HW_COMPAT_2_5
 368
 369 #define CCW_COMPAT_2_4 \
 370         HW_COMPAT_2_4 \
 371         {\
 372             .driver   = TYPE_S390_SKEYS,\
 373             .property = "migration-enabled",\
 374             .value    = "off",\
 375         },{\
 376             .driver   = "virtio-blk-ccw",\
 377             .property = "max_revision",\
 378             .value    = "0",\
 379         },{\
 380             .driver   = "virtio-balloon-ccw",\
 381             .property = "max_revision",\
 382             .value    = "0",\
 383         },{\
 384             .driver   = "virtio-serial-ccw",\
 385             .property = "max_revision",\
 386             .value    = "0",\
 387         },{\
 388             .driver   = "virtio-9p-ccw",\
 389             .property = "max_revision",\
 390             .value    = "0",\
 391         },{\
 392             .driver   = "virtio-rng-ccw",\
 393             .property = "max_revision",\
 394             .value    = "0",\
 395         },{\
 396             .driver   = "virtio-net-ccw",\
 397             .property = "max_revision",\
 398             .value    = "0",\
 399         },{\
 400             .driver   = "virtio-scsi-ccw",\
 401             .property = "max_revision",\
 402             .value    = "0",\
 403         },{\
 404             .driver   = "vhost-scsi-ccw",\
 405             .property = "max_revision",\
 406             .value    = "0",\
 407         },
 408
 409 static void ccw_machine_2_10_instance_options(MachineState *machine)
 410 {
 411 }
 412
 413 static void ccw_machine_2_10_class_options(MachineClass *mc)
 414 {
 415 }
 416 DEFINE_CCW_MACHINE(2_10, "2.10", true);
 417
 418 static void ccw_machine_2_9_instance_options(MachineState *machine)
 419 {
 420     ccw_machine_2_10_instance_options(machine);
 421 }
 422
 423 static void ccw_machine_2_9_class_options(MachineClass *mc)
 424 {
 425     ccw_machine_2_10_class_options(mc);
 426     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_9);
 427 }
 428 DEFINE_CCW_MACHINE(2_9, "2.9", false);
 429
 430 static void ccw_machine_2_8_instance_options(MachineState *machine)
 431 {
 432     ccw_machine_2_9_instance_options(machine);
 433 }
 434
 435 static void ccw_machine_2_8_class_options(MachineClass *mc)
 436 {
 437     ccw_machine_2_9_class_options(mc);
 438     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_8);
 439 }
 440 DEFINE_CCW_MACHINE(2_8, "2.8", false);
 441
 442 static void ccw_machine_2_7_instance_options(MachineState *machine)
 443 {
 444     ccw_machine_2_8_instance_options(machine);
 445 }
 446
 447 static void ccw_machine_2_7_class_options(MachineClass *mc)
 448 {
 449     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 450
 451     s390mc->cpu_model_allowed = false;
 452     ccw_machine_2_8_class_options(mc);
 453     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_7);
 454 }
 455 DEFINE_CCW_MACHINE(2_7, "2.7", false);
 456
 457 static void ccw_machine_2_6_instance_options(MachineState *machine)
 458 {
 459     ccw_machine_2_7_instance_options(machine);
 460 }
 461
 462 static void ccw_machine_2_6_class_options(MachineClass *mc)
 463 {
 464     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 465
 466     s390mc->ri_allowed = false;
 467     ccw_machine_2_7_class_options(mc);
 468     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_6);
 469 }
 470 DEFINE_CCW_MACHINE(2_6, "2.6", false);
 471
 472 static void ccw_machine_2_5_instance_options(MachineState *machine)
 473 {
 474     ccw_machine_2_6_instance_options(machine);
 475 }
 476
 477 static void ccw_machine_2_5_class_options(MachineClass *mc)
 478 {
 479     ccw_machine_2_6_class_options(mc);
 480     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 481 }
 482 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 483
 484 static void ccw_machine_2_4_instance_options(MachineState *machine)
 485 {
 486     ccw_machine_2_5_instance_options(machine);
 487 }
 488
 489 static void ccw_machine_2_4_class_options(MachineClass *mc)
 490 {
 491     ccw_machine_2_5_class_options(mc);
 492     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 493 }
 494 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 495
 496 static void ccw_machine_register_types(void)
 497 {
 498     type_register_static(&ccw_machine_info);
 499 }
 500
 501 type_init(ccw_machine_register_types)