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