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     /* get a BUS */
 117     css_bus = virtual_css_bus_init();
 118     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
 119                       machine->initrd_filename, "s390-ccw.img",
 120                       "s390-netboot.img", true);
 121     s390_flic_init();
 122
 123     dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
 124     object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
 125                               OBJECT(dev), NULL);
 126     qdev_init_nofail(dev);
 127
 128     /* register hypercalls */
 129     virtio_ccw_register_hcalls();
 130
 131     /* init CPUs */
 132     s390_init_cpus(machine);
 133
 134     if (kvm_enabled()) {
 135         kvm_s390_enable_css_support(s390_cpu_addr2state(0));
 136     }
 137     /*
 138      * Create virtual css and set it as default so that non mcss-e
 139      * enabled guests only see virtio devices.
 140      */
 141     ret = css_create_css_image(VIRTUAL_CSSID, true);
 142     assert(ret == 0);
 143
 144     /* Create VirtIO network adapters */
 145     s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
 146
 147     /* Register savevm handler for guest TOD clock */
 148     register_savevm(NULL, "todclock", 0, 1,
 149                     gtod_save, gtod_load, kvm_state);
 150 }
 151
 152 static void s390_cpu_plug(HotplugHandler *hotplug_dev,
 153                         DeviceState *dev, Error **errp)
 154 {
 155     gchar *name;
 156     S390CPU *cpu = S390_CPU(dev);
 157     CPUState *cs = CPU(dev);
 158
 159     name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
 160     object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
 161                              errp);
 162     g_free(name);
 163 }
 164
 165 static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
 166                                      DeviceState *dev, Error **errp)
 167 {
 168     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 169         s390_cpu_plug(hotplug_dev, dev, errp);
 170     }
 171 }
 172
 173 static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
 174                                                 DeviceState *dev)
 175 {
 176     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 177         return HOTPLUG_HANDLER(machine);
 178     }
 179     return NULL;
 180 }
 181
 182 static void s390_hot_add_cpu(const int64_t id, Error **errp)
 183 {
 184     MachineState *machine = MACHINE(qdev_get_machine());
 185
 186     s390x_new_cpu(machine->cpu_model, id, errp);
 187 }
 188
 189 static void ccw_machine_class_init(ObjectClass *oc, void *data)
 190 {
 191     MachineClass *mc = MACHINE_CLASS(oc);
 192     NMIClass *nc = NMI_CLASS(oc);
 193     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 194     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 195
 196     s390mc->ri_allowed = true;
 197     s390mc->cpu_model_allowed = true;
 198     mc->init = ccw_init;
 199     mc->reset = s390_machine_reset;
 200     mc->hot_add_cpu = s390_hot_add_cpu;
 201     mc->block_default_type = IF_VIRTIO;
 202     mc->no_cdrom = 1;
 203     mc->no_floppy = 1;
 204     mc->no_serial = 1;
 205     mc->no_parallel = 1;
 206     mc->no_sdcard = 1;
 207     mc->use_sclp = 1;
 208     mc->max_cpus = 248;
 209     mc->get_hotplug_handler = s390_get_hotplug_handler;
 210     hc->plug = s390_machine_device_plug;
 211     nc->nmi_monitor_handler = s390_nmi;
 212 }
 213
 214 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
 215 {
 216     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 217
 218     return ms->aes_key_wrap;
 219 }
 220
 221 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
 222                                             Error **errp)
 223 {
 224     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 225
 226     ms->aes_key_wrap = value;
 227 }
 228
 229 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
 230 {
 231     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 232
 233     return ms->dea_key_wrap;
 234 }
 235
 236 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
 237                                             Error **errp)
 238 {
 239     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 240
 241     ms->dea_key_wrap = value;
 242 }
 243
 244 bool ri_allowed(void)
 245 {
 246     if (kvm_enabled()) {
 247         MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
 248         if (object_class_dynamic_cast(OBJECT_CLASS(mc),
 249                                       TYPE_S390_CCW_MACHINE)) {
 250             S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 251
 252             return s390mc->ri_allowed;
 253         }
 254         /*
 255          * Make sure the "none" machine can have ri, otherwise it won't * be
 256          * unlocked in KVM and therefore the host CPU model might be wrong.
 257          */
 258         return true;
 259     }
 260     return 0;
 261 }
 262
 263 bool cpu_model_allowed(void)
 264 {
 265     MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
 266     if (object_class_dynamic_cast(OBJECT_CLASS(mc),
 267                                   TYPE_S390_CCW_MACHINE)) {
 268         S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 269
 270         return s390mc->cpu_model_allowed;
 271     }
 272     /* allow CPU model qmp queries with the "none" machine */
 273     return true;
 274 }
 275
 276 static inline void s390_machine_initfn(Object *obj)
 277 {
 278     object_property_add_bool(obj, "aes-key-wrap",
 279                              machine_get_aes_key_wrap,
 280                              machine_set_aes_key_wrap, NULL);
 281     object_property_set_description(obj, "aes-key-wrap",
 282             "enable/disable AES key wrapping using the CPACF wrapping key",
 283             NULL);
 284     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 285
 286     object_property_add_bool(obj, "dea-key-wrap",
 287                              machine_get_dea_key_wrap,
 288                              machine_set_dea_key_wrap, NULL);
 289     object_property_set_description(obj, "dea-key-wrap",
 290             "enable/disable DEA key wrapping using the CPACF wrapping key",
 291             NULL);
 292     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 293 }
 294
 295 static const TypeInfo ccw_machine_info = {
 296     .name          = TYPE_S390_CCW_MACHINE,
 297     .parent        = TYPE_MACHINE,
 298     .abstract      = true,
 299     .instance_size = sizeof(S390CcwMachineState),
 300     .instance_init = s390_machine_initfn,
 301     .class_size = sizeof(S390CcwMachineClass),
 302     .class_init    = ccw_machine_class_init,
 303     .interfaces = (InterfaceInfo[]) {
 304         { TYPE_NMI },
 305         { TYPE_HOTPLUG_HANDLER},
 306         { }
 307     },
 308 };
 309
 310 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 311     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 312                                                   void *data)                 \
 313     {                                                                         \
 314         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 315         ccw_machine_##suffix##_class_options(mc);                             \
 316         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 317         if (latest) {                                                         \
 318             mc->alias = "s390-ccw-virtio";                                    \
 319             mc->is_default = 1;                                               \
 320         }                                                                     \
 321     }                                                                         \
 322     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 323     {                                                                         \
 324         MachineState *machine = MACHINE(obj);                                 \
 325         ccw_machine_##suffix##_instance_options(machine);                     \
 326     }                                                                         \
 327     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 328         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 329         .parent = TYPE_S390_CCW_MACHINE,                                      \
 330         .class_init = ccw_machine_##suffix##_class_init,                      \
 331         .instance_init = ccw_machine_##suffix##_instance_init,                \
 332     };                                                                        \
 333     static void ccw_machine_register_##suffix(void)                           \
 334     {                                                                         \
 335         type_register_static(&ccw_machine_##suffix##_info);                   \
 336     }                                                                         \
 337     type_init(ccw_machine_register_##suffix)
 338
 339 #define CCW_COMPAT_2_8 \
 340         HW_COMPAT_2_8 \
 341         {\
 342             .driver   = TYPE_S390_FLIC_COMMON,\
 343             .property = "adapter_routes_max_batch",\
 344             .value    = "64",\
 345         },
 346
 347 #define CCW_COMPAT_2_7 \
 348         HW_COMPAT_2_7
 349
 350 #define CCW_COMPAT_2_6 \
 351         HW_COMPAT_2_6 \
 352         {\
 353             .driver   = TYPE_S390_IPL,\
 354             .property = "iplbext_migration",\
 355             .value    = "off",\
 356         }, {\
 357             .driver   = TYPE_VIRTUAL_CSS_BRIDGE,\
 358             .property = "css_dev_path",\
 359             .value    = "off",\
 360         },
 361
 362 #define CCW_COMPAT_2_5 \
 363         HW_COMPAT_2_5
 364
 365 #define CCW_COMPAT_2_4 \
 366         HW_COMPAT_2_4 \
 367         {\
 368             .driver   = TYPE_S390_SKEYS,\
 369             .property = "migration-enabled",\
 370             .value    = "off",\
 371         },{\
 372             .driver   = "virtio-blk-ccw",\
 373             .property = "max_revision",\
 374             .value    = "0",\
 375         },{\
 376             .driver   = "virtio-balloon-ccw",\
 377             .property = "max_revision",\
 378             .value    = "0",\
 379         },{\
 380             .driver   = "virtio-serial-ccw",\
 381             .property = "max_revision",\
 382             .value    = "0",\
 383         },{\
 384             .driver   = "virtio-9p-ccw",\
 385             .property = "max_revision",\
 386             .value    = "0",\
 387         },{\
 388             .driver   = "virtio-rng-ccw",\
 389             .property = "max_revision",\
 390             .value    = "0",\
 391         },{\
 392             .driver   = "virtio-net-ccw",\
 393             .property = "max_revision",\
 394             .value    = "0",\
 395         },{\
 396             .driver   = "virtio-scsi-ccw",\
 397             .property = "max_revision",\
 398             .value    = "0",\
 399         },{\
 400             .driver   = "vhost-scsi-ccw",\
 401             .property = "max_revision",\
 402             .value    = "0",\
 403         },
 404
 405 static void ccw_machine_2_9_instance_options(MachineState *machine)
 406 {
 407 }
 408
 409 static void ccw_machine_2_9_class_options(MachineClass *mc)
 410 {
 411 }
 412 DEFINE_CCW_MACHINE(2_9, "2.9", true);
 413
 414 static void ccw_machine_2_8_instance_options(MachineState *machine)
 415 {
 416     ccw_machine_2_9_instance_options(machine);
 417 }
 418
 419 static void ccw_machine_2_8_class_options(MachineClass *mc)
 420 {
 421     ccw_machine_2_9_class_options(mc);
 422     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_8);
 423 }
 424 DEFINE_CCW_MACHINE(2_8, "2.8", false);
 425
 426 static void ccw_machine_2_7_instance_options(MachineState *machine)
 427 {
 428     ccw_machine_2_8_instance_options(machine);
 429 }
 430
 431 static void ccw_machine_2_7_class_options(MachineClass *mc)
 432 {
 433     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 434
 435     s390mc->cpu_model_allowed = false;
 436     ccw_machine_2_8_class_options(mc);
 437     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_7);
 438 }
 439 DEFINE_CCW_MACHINE(2_7, "2.7", false);
 440
 441 static void ccw_machine_2_6_instance_options(MachineState *machine)
 442 {
 443     ccw_machine_2_7_instance_options(machine);
 444 }
 445
 446 static void ccw_machine_2_6_class_options(MachineClass *mc)
 447 {
 448     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 449
 450     s390mc->ri_allowed = false;
 451     ccw_machine_2_7_class_options(mc);
 452     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_6);
 453 }
 454 DEFINE_CCW_MACHINE(2_6, "2.6", false);
 455
 456 static void ccw_machine_2_5_instance_options(MachineState *machine)
 457 {
 458     ccw_machine_2_6_instance_options(machine);
 459 }
 460
 461 static void ccw_machine_2_5_class_options(MachineClass *mc)
 462 {
 463     ccw_machine_2_6_class_options(mc);
 464     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 465 }
 466 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 467
 468 static void ccw_machine_2_4_instance_options(MachineState *machine)
 469 {
 470     ccw_machine_2_5_instance_options(machine);
 471 }
 472
 473 static void ccw_machine_2_4_class_options(MachineClass *mc)
 474 {
 475     ccw_machine_2_5_class_options(mc);
 476     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 477 }
 478 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 479
 480 static void ccw_machine_register_types(void)
 481 {
 482     type_register_static(&ccw_machine_info);
 483 }
 484
 485 type_init(ccw_machine_register_types)