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     mc->init = ccw_init;
 197     mc->reset = s390_machine_reset;
 198     mc->hot_add_cpu = s390_hot_add_cpu;
 199     mc->block_default_type = IF_VIRTIO;
 200     mc->no_cdrom = 1;
 201     mc->no_floppy = 1;
 202     mc->no_serial = 1;
 203     mc->no_parallel = 1;
 204     mc->no_sdcard = 1;
 205     mc->use_sclp = 1;
 206     mc->max_cpus = 248;
 207     mc->get_hotplug_handler = s390_get_hotplug_handler;
 208     hc->plug = s390_machine_device_plug;
 209     nc->nmi_monitor_handler = s390_nmi;
 210 }
 211
 212 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
 213 {
 214     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 215
 216     return ms->aes_key_wrap;
 217 }
 218
 219 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
 220                                             Error **errp)
 221 {
 222     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 223
 224     ms->aes_key_wrap = value;
 225 }
 226
 227 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
 228 {
 229     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 230
 231     return ms->dea_key_wrap;
 232 }
 233
 234 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
 235                                             Error **errp)
 236 {
 237     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 238
 239     ms->dea_key_wrap = value;
 240 }
 241
 242 bool ri_allowed(void)
 243 {
 244     if (kvm_enabled()) {
 245         MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
 246         if (object_class_dynamic_cast(OBJECT_CLASS(mc),
 247                                       TYPE_S390_CCW_MACHINE)) {
 248             S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 249
 250             return s390mc->ri_allowed;
 251         }
 252     }
 253     return 0;
 254 }
 255
 256 static inline void s390_machine_initfn(Object *obj)
 257 {
 258     object_property_add_bool(obj, "aes-key-wrap",
 259                              machine_get_aes_key_wrap,
 260                              machine_set_aes_key_wrap, NULL);
 261     object_property_set_description(obj, "aes-key-wrap",
 262             "enable/disable AES key wrapping using the CPACF wrapping key",
 263             NULL);
 264     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 265
 266     object_property_add_bool(obj, "dea-key-wrap",
 267                              machine_get_dea_key_wrap,
 268                              machine_set_dea_key_wrap, NULL);
 269     object_property_set_description(obj, "dea-key-wrap",
 270             "enable/disable DEA key wrapping using the CPACF wrapping key",
 271             NULL);
 272     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 273 }
 274
 275 static const TypeInfo ccw_machine_info = {
 276     .name          = TYPE_S390_CCW_MACHINE,
 277     .parent        = TYPE_MACHINE,
 278     .abstract      = true,
 279     .instance_size = sizeof(S390CcwMachineState),
 280     .instance_init = s390_machine_initfn,
 281     .class_size = sizeof(S390CcwMachineClass),
 282     .class_init    = ccw_machine_class_init,
 283     .interfaces = (InterfaceInfo[]) {
 284         { TYPE_NMI },
 285         { TYPE_HOTPLUG_HANDLER},
 286         { }
 287     },
 288 };
 289
 290 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 291     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 292                                                   void *data)                 \
 293     {                                                                         \
 294         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 295         ccw_machine_##suffix##_class_options(mc);                             \
 296         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 297         if (latest) {                                                         \
 298             mc->alias = "s390-ccw-virtio";                                    \
 299             mc->is_default = 1;                                               \
 300         }                                                                     \
 301     }                                                                         \
 302     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 303     {                                                                         \
 304         MachineState *machine = MACHINE(obj);                                 \
 305         ccw_machine_##suffix##_instance_options(machine);                     \
 306     }                                                                         \
 307     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 308         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 309         .parent = TYPE_S390_CCW_MACHINE,                                      \
 310         .class_init = ccw_machine_##suffix##_class_init,                      \
 311         .instance_init = ccw_machine_##suffix##_instance_init,                \
 312     };                                                                        \
 313     static void ccw_machine_register_##suffix(void)                           \
 314     {                                                                         \
 315         type_register_static(&ccw_machine_##suffix##_info);                   \
 316     }                                                                         \
 317     type_init(ccw_machine_register_##suffix)
 318
 319 #define CCW_COMPAT_2_7 \
 320         HW_COMPAT_2_7
 321
 322 #define CCW_COMPAT_2_6 \
 323         CCW_COMPAT_2_7 \
 324         HW_COMPAT_2_6 \
 325         {\
 326             .driver   = TYPE_S390_IPL,\
 327             .property = "iplbext_migration",\
 328             .value    = "off",\
 329         }, {\
 330             .driver   = TYPE_VIRTUAL_CSS_BRIDGE,\
 331             .property = "css_dev_path",\
 332             .value    = "off",\
 333         },
 334
 335 #define CCW_COMPAT_2_5 \
 336         CCW_COMPAT_2_6 \
 337         HW_COMPAT_2_5
 338
 339 #define CCW_COMPAT_2_4 \
 340         HW_COMPAT_2_4 \
 341         {\
 342             .driver   = TYPE_S390_SKEYS,\
 343             .property = "migration-enabled",\
 344             .value    = "off",\
 345         },{\
 346             .driver   = "virtio-blk-ccw",\
 347             .property = "max_revision",\
 348             .value    = "0",\
 349         },{\
 350             .driver   = "virtio-balloon-ccw",\
 351             .property = "max_revision",\
 352             .value    = "0",\
 353         },{\
 354             .driver   = "virtio-serial-ccw",\
 355             .property = "max_revision",\
 356             .value    = "0",\
 357         },{\
 358             .driver   = "virtio-9p-ccw",\
 359             .property = "max_revision",\
 360             .value    = "0",\
 361         },{\
 362             .driver   = "virtio-rng-ccw",\
 363             .property = "max_revision",\
 364             .value    = "0",\
 365         },{\
 366             .driver   = "virtio-net-ccw",\
 367             .property = "max_revision",\
 368             .value    = "0",\
 369         },{\
 370             .driver   = "virtio-scsi-ccw",\
 371             .property = "max_revision",\
 372             .value    = "0",\
 373         },{\
 374             .driver   = "vhost-scsi-ccw",\
 375             .property = "max_revision",\
 376             .value    = "0",\
 377         },
 378
 379 static void ccw_machine_2_8_instance_options(MachineState *machine)
 380 {
 381 }
 382
 383 static void ccw_machine_2_8_class_options(MachineClass *mc)
 384 {
 385 }
 386 DEFINE_CCW_MACHINE(2_8, "2.8", true);
 387
 388 static void ccw_machine_2_7_instance_options(MachineState *machine)
 389 {
 390     ccw_machine_2_8_instance_options(machine);
 391 }
 392
 393 static void ccw_machine_2_7_class_options(MachineClass *mc)
 394 {
 395     ccw_machine_2_8_class_options(mc);
 396     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_7);
 397 }
 398 DEFINE_CCW_MACHINE(2_7, "2.7", false);
 399
 400 static void ccw_machine_2_6_instance_options(MachineState *machine)
 401 {
 402     ccw_machine_2_7_instance_options(machine);
 403 }
 404
 405 static void ccw_machine_2_6_class_options(MachineClass *mc)
 406 {
 407     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 408
 409     s390mc->ri_allowed = false;
 410     ccw_machine_2_7_class_options(mc);
 411     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_6);
 412 }
 413 DEFINE_CCW_MACHINE(2_6, "2.6", false);
 414
 415 static void ccw_machine_2_5_instance_options(MachineState *machine)
 416 {
 417     ccw_machine_2_6_instance_options(machine);
 418 }
 419
 420 static void ccw_machine_2_5_class_options(MachineClass *mc)
 421 {
 422     ccw_machine_2_6_class_options(mc);
 423     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 424 }
 425 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 426
 427 static void ccw_machine_2_4_instance_options(MachineState *machine)
 428 {
 429     ccw_machine_2_5_instance_options(machine);
 430 }
 431
 432 static void ccw_machine_2_4_class_options(MachineClass *mc)
 433 {
 434     ccw_machine_2_5_class_options(mc);
 435     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 436 }
 437 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 438
 439 static void ccw_machine_register_types(void)
 440 {
 441     type_register_static(&ccw_machine_info);
 442 }
 443
 444 type_init(ccw_machine_register_types)