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
  31 static const char *const reset_dev_types[] = {
  32     "virtual-css-bridge",
  33     "s390-sclp-event-facility",
  34     "s390-flic",
  35     "diag288",
  36 };
  37
  38 void subsystem_reset(void)
  39 {
  40     DeviceState *dev;
  41     int i;
  42
  43     for (i = 0; i < ARRAY_SIZE(reset_dev_types); i++) {
  44         dev = DEVICE(object_resolve_path_type("", reset_dev_types[i], NULL));
  45         if (dev) {
  46             qdev_reset_all(dev);
  47         }
  48     }
  49 }
  50
  51 static int virtio_ccw_hcall_notify(const uint64_t *args)
  52 {
  53     uint64_t subch_id = args[0];
  54     uint64_t queue = args[1];
  55     SubchDev *sch;
  56     int cssid, ssid, schid, m;
  57
  58     if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
  59         return -EINVAL;
  60     }
  61     sch = css_find_subch(m, cssid, ssid, schid);
  62     if (!sch || !css_subch_visible(sch)) {
  63         return -EINVAL;
  64     }
  65     if (queue >= VIRTIO_CCW_QUEUE_MAX) {
  66         return -EINVAL;
  67     }
  68     virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
  69     return 0;
  70
  71 }
  72
  73 static int virtio_ccw_hcall_early_printk(const uint64_t *args)
  74 {
  75     uint64_t mem = args[0];
  76
  77     if (mem < ram_size) {
  78         /* Early printk */
  79         return 0;
  80     }
  81     return -EINVAL;
  82 }
  83
  84 static void virtio_ccw_register_hcalls(void)
  85 {
  86     s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY,
  87                                    virtio_ccw_hcall_notify);
  88     /* Tolerate early printk. */
  89     s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
  90                                    virtio_ccw_hcall_early_printk);
  91 }
  92
  93 void s390_memory_init(ram_addr_t mem_size)
  94 {
  95     MemoryRegion *sysmem = get_system_memory();
  96     MemoryRegion *ram = g_new(MemoryRegion, 1);
  97
  98     /* allocate RAM for core */
  99     memory_region_allocate_system_memory(ram, NULL, "s390.ram", mem_size);
 100     memory_region_add_subregion(sysmem, 0, ram);
 101
 102     /* Initialize storage key device */
 103     s390_skeys_init();
 104 }
 105
 106 static void ccw_init(MachineState *machine)
 107 {
 108     int ret;
 109     VirtualCssBus *css_bus;
 110     DeviceState *dev;
 111
 112     s390_sclp_init();
 113     s390_memory_init(machine->ram_size);
 114
 115     /* get a BUS */
 116     css_bus = virtual_css_bus_init();
 117     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
 118                       machine->initrd_filename, "s390-ccw.img", true);
 119     s390_flic_init();
 120
 121     dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
 122     object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
 123                               OBJECT(dev), NULL);
 124     qdev_init_nofail(dev);
 125
 126     /* register hypercalls */
 127     virtio_ccw_register_hcalls();
 128
 129     /* init CPUs */
 130     s390_init_cpus(machine);
 131
 132     if (kvm_enabled()) {
 133         kvm_s390_enable_css_support(s390_cpu_addr2state(0));
 134     }
 135     /*
 136      * Create virtual css and set it as default so that non mcss-e
 137      * enabled guests only see virtio devices.
 138      */
 139     ret = css_create_css_image(VIRTUAL_CSSID, true);
 140     assert(ret == 0);
 141
 142     /* Create VirtIO network adapters */
 143     s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
 144
 145     /* Register savevm handler for guest TOD clock */
 146     register_savevm(NULL, "todclock", 0, 1,
 147                     gtod_save, gtod_load, kvm_state);
 148 }
 149
 150 static void s390_cpu_plug(HotplugHandler *hotplug_dev,
 151                         DeviceState *dev, Error **errp)
 152 {
 153     gchar *name;
 154     S390CPU *cpu = S390_CPU(dev);
 155     CPUState *cs = CPU(dev);
 156
 157     name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
 158     object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
 159                              errp);
 160     g_free(name);
 161 }
 162
 163 static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
 164                                      DeviceState *dev, Error **errp)
 165 {
 166     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 167         s390_cpu_plug(hotplug_dev, dev, errp);
 168     }
 169 }
 170
 171 static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
 172                                                 DeviceState *dev)
 173 {
 174     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 175         return HOTPLUG_HANDLER(machine);
 176     }
 177     return NULL;
 178 }
 179
 180 static void s390_hot_add_cpu(const int64_t id, Error **errp)
 181 {
 182     MachineState *machine = MACHINE(qdev_get_machine());
 183     Error *err = NULL;
 184
 185     s390x_new_cpu(machine->cpu_model, id, &err);
 186     error_propagate(errp, err);
 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     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 = 255;
 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     return 0;
 255 }
 256
 257 static inline void s390_machine_initfn(Object *obj)
 258 {
 259     object_property_add_bool(obj, "aes-key-wrap",
 260                              machine_get_aes_key_wrap,
 261                              machine_set_aes_key_wrap, NULL);
 262     object_property_set_description(obj, "aes-key-wrap",
 263             "enable/disable AES key wrapping using the CPACF wrapping key",
 264             NULL);
 265     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 266
 267     object_property_add_bool(obj, "dea-key-wrap",
 268                              machine_get_dea_key_wrap,
 269                              machine_set_dea_key_wrap, NULL);
 270     object_property_set_description(obj, "dea-key-wrap",
 271             "enable/disable DEA key wrapping using the CPACF wrapping key",
 272             NULL);
 273     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 274 }
 275
 276 static const TypeInfo ccw_machine_info = {
 277     .name          = TYPE_S390_CCW_MACHINE,
 278     .parent        = TYPE_MACHINE,
 279     .abstract      = true,
 280     .instance_size = sizeof(S390CcwMachineState),
 281     .instance_init = s390_machine_initfn,
 282     .class_size = sizeof(S390CcwMachineClass),
 283     .class_init    = ccw_machine_class_init,
 284     .interfaces = (InterfaceInfo[]) {
 285         { TYPE_NMI },
 286         { TYPE_HOTPLUG_HANDLER},
 287         { }
 288     },
 289 };
 290
 291 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 292     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 293                                                   void *data)                 \
 294     {                                                                         \
 295         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 296         ccw_machine_##suffix##_class_options(mc);                             \
 297         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 298         if (latest) {                                                         \
 299             mc->alias = "s390-ccw-virtio";                                    \
 300             mc->is_default = 1;                                               \
 301         }                                                                     \
 302     }                                                                         \
 303     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 304     {                                                                         \
 305         MachineState *machine = MACHINE(obj);                                 \
 306         ccw_machine_##suffix##_instance_options(machine);                     \
 307     }                                                                         \
 308     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 309         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 310         .parent = TYPE_S390_CCW_MACHINE,                                      \
 311         .class_init = ccw_machine_##suffix##_class_init,                      \
 312         .instance_init = ccw_machine_##suffix##_instance_init,                \
 313     };                                                                        \
 314     static void ccw_machine_register_##suffix(void)                           \
 315     {                                                                         \
 316         type_register_static(&ccw_machine_##suffix##_info);                   \
 317     }                                                                         \
 318     type_init(ccw_machine_register_##suffix)
 319
 320 #define CCW_COMPAT_2_6 \
 321         HW_COMPAT_2_6 \
 322         {\
 323             .driver   = TYPE_S390_IPL,\
 324             .property = "iplbext_migration",\
 325             .value    = "off",\
 326         },
 327
 328 #define CCW_COMPAT_2_5 \
 329         CCW_COMPAT_2_6 \
 330         HW_COMPAT_2_5
 331
 332 #define CCW_COMPAT_2_4 \
 333         CCW_COMPAT_2_5 \
 334         HW_COMPAT_2_4 \
 335         {\
 336             .driver   = TYPE_S390_SKEYS,\
 337             .property = "migration-enabled",\
 338             .value    = "off",\
 339         },{\
 340             .driver   = "virtio-blk-ccw",\
 341             .property = "max_revision",\
 342             .value    = "0",\
 343         },{\
 344             .driver   = "virtio-balloon-ccw",\
 345             .property = "max_revision",\
 346             .value    = "0",\
 347         },{\
 348             .driver   = "virtio-serial-ccw",\
 349             .property = "max_revision",\
 350             .value    = "0",\
 351         },{\
 352             .driver   = "virtio-9p-ccw",\
 353             .property = "max_revision",\
 354             .value    = "0",\
 355         },{\
 356             .driver   = "virtio-rng-ccw",\
 357             .property = "max_revision",\
 358             .value    = "0",\
 359         },{\
 360             .driver   = "virtio-net-ccw",\
 361             .property = "max_revision",\
 362             .value    = "0",\
 363         },{\
 364             .driver   = "virtio-scsi-ccw",\
 365             .property = "max_revision",\
 366             .value    = "0",\
 367         },{\
 368             .driver   = "vhost-scsi-ccw",\
 369             .property = "max_revision",\
 370             .value    = "0",\
 371         },
 372
 373 static void ccw_machine_2_7_instance_options(MachineState *machine)
 374 {
 375 }
 376
 377 static void ccw_machine_2_7_class_options(MachineClass *mc)
 378 {
 379 }
 380 DEFINE_CCW_MACHINE(2_7, "2.7", true);
 381
 382 static void ccw_machine_2_6_instance_options(MachineState *machine)
 383 {
 384     ccw_machine_2_7_instance_options(machine);
 385 }
 386
 387 static void ccw_machine_2_6_class_options(MachineClass *mc)
 388 {
 389     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
 390
 391     s390mc->ri_allowed = false;
 392     ccw_machine_2_7_class_options(mc);
 393     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_6);
 394 }
 395 DEFINE_CCW_MACHINE(2_6, "2.6", false);
 396
 397 static void ccw_machine_2_5_instance_options(MachineState *machine)
 398 {
 399     ccw_machine_2_6_instance_options(machine);
 400 }
 401
 402 static void ccw_machine_2_5_class_options(MachineClass *mc)
 403 {
 404     ccw_machine_2_6_class_options(mc);
 405     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 406 }
 407 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 408
 409 static void ccw_machine_2_4_instance_options(MachineState *machine)
 410 {
 411     ccw_machine_2_5_instance_options(machine);
 412 }
 413
 414 static void ccw_machine_2_4_class_options(MachineClass *mc)
 415 {
 416     ccw_machine_2_5_class_options(mc);
 417     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 418 }
 419 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 420
 421 static void ccw_machine_register_types(void)
 422 {
 423     type_register_static(&ccw_machine_info);
 424 }
 425
 426 type_init(ccw_machine_register_types)