hw/s390x/sclp.c

   1 /*
   2  * SCLP Support
   3  *
   4  * Copyright IBM, Corp. 2012
   5  *
   6  * Authors:
   7  *  Christian Borntraeger <borntraeger@de.ibm.com>
   8  *  Heinz Graalfs <graalfs@linux.vnet.ibm.com>
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2 or (at your
  11  * option) any later version.  See the COPYING file in the top-level directory.
  12  *
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include "qapi/error.h"
  17 #include "cpu.h"
  18 #include "exec/memory.h"
  19 #include "sysemu/sysemu.h"
  20 #include "exec/address-spaces.h"
  21 #include "hw/boards.h"
  22 #include "hw/s390x/sclp.h"
  23 #include "hw/s390x/event-facility.h"
  24 #include "hw/s390x/s390-pci-bus.h"
  25 #include "hw/s390x/ipl.h"
  26
  27 static inline SCLPDevice *get_sclp_device(void)
  28 {
  29     static SCLPDevice *sclp;
  30
  31     if (!sclp) {
  32         sclp = SCLP(object_resolve_path_type("", TYPE_SCLP, NULL));
  33     }
  34     return sclp;
  35 }
  36
  37 static void prepare_cpu_entries(SCLPDevice *sclp, CPUEntry *entry, int count)
  38 {
  39     uint8_t features[SCCB_CPU_FEATURE_LEN] = { 0 };
  40     int i;
  41
  42     s390_get_feat_block(S390_FEAT_TYPE_SCLP_CPU, features);
  43     for (i = 0; i < count; i++) {
  44         entry[i].address = i;
  45         entry[i].type = 0;
  46         memcpy(entry[i].features, features, sizeof(entry[i].features));
  47     }
  48 }
  49
  50 /* Provide information about the configuration, CPUs and storage */
  51 static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb)
  52 {
  53     ReadInfo *read_info = (ReadInfo *) sccb;
  54     MachineState *machine = MACHINE(qdev_get_machine());
  55     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
  56     CPUState *cpu;
  57     int cpu_count = 0;
  58     int rnsize, rnmax;
  59     int slots = MIN(machine->ram_slots, s390_get_memslot_count());
  60     IplParameterBlock *ipib = s390_ipl_get_iplb();
  61
  62     CPU_FOREACH(cpu) {
  63         cpu_count++;
  64     }
  65
  66     /* CPU information */
  67     read_info->entries_cpu = cpu_to_be16(cpu_count);
  68     read_info->offset_cpu = cpu_to_be16(offsetof(ReadInfo, entries));
  69     read_info->highest_cpu = cpu_to_be16(max_cpus);
  70
  71     read_info->ibc_val = cpu_to_be32(s390_get_ibc_val());
  72
  73     /* Configuration Characteristic (Extension) */
  74     s390_get_feat_block(S390_FEAT_TYPE_SCLP_CONF_CHAR,
  75                          read_info->conf_char);
  76     s390_get_feat_block(S390_FEAT_TYPE_SCLP_CONF_CHAR_EXT,
  77                          read_info->conf_char_ext);
  78
  79     prepare_cpu_entries(sclp, read_info->entries, cpu_count);
  80
  81     read_info->facilities = cpu_to_be64(SCLP_HAS_CPU_INFO |
  82                                         SCLP_HAS_IOA_RECONFIG);
  83
  84     /* Memory Hotplug is only supported for the ccw machine type */
  85     if (mhd) {
  86         mhd->standby_subregion_size = MEM_SECTION_SIZE;
  87         /* Deduct the memory slot already used for core */
  88         if (slots > 0) {
  89             while ((mhd->standby_subregion_size * (slots - 1)
  90                     < mhd->standby_mem_size)) {
  91                 mhd->standby_subregion_size = mhd->standby_subregion_size << 1;
  92             }
  93         }
  94         /*
  95          * Initialize mapping of guest standby memory sections indicating which
  96          * are and are not online. Assume all standby memory begins offline.
  97          */
  98         if (mhd->standby_state_map == 0) {
  99             if (mhd->standby_mem_size % mhd->standby_subregion_size) {
 100                 mhd->standby_state_map = g_malloc0((mhd->standby_mem_size /
 101                                              mhd->standby_subregion_size + 1) *
 102                                              (mhd->standby_subregion_size /
 103                                              MEM_SECTION_SIZE));
 104             } else {
 105                 mhd->standby_state_map = g_malloc0(mhd->standby_mem_size /
 106                                                    MEM_SECTION_SIZE);
 107             }
 108         }
 109         mhd->padded_ram_size = ram_size + mhd->pad_size;
 110         mhd->rzm = 1 << mhd->increment_size;
 111
 112         read_info->facilities |= cpu_to_be64(SCLP_FC_ASSIGN_ATTACH_READ_STOR);
 113     }
 114     read_info->mha_pow = s390_get_mha_pow();
 115     read_info->hmfai = cpu_to_be32(s390_get_hmfai());
 116
 117     rnsize = 1 << (sclp->increment_size - 20);
 118     if (rnsize <= 128) {
 119         read_info->rnsize = rnsize;
 120     } else {
 121         read_info->rnsize = 0;
 122         read_info->rnsize2 = cpu_to_be32(rnsize);
 123     }
 124
 125     rnmax = machine->maxram_size >> sclp->increment_size;
 126     if (rnmax < 0x10000) {
 127         read_info->rnmax = cpu_to_be16(rnmax);
 128     } else {
 129         read_info->rnmax = cpu_to_be16(0);
 130         read_info->rnmax2 = cpu_to_be64(rnmax);
 131     }
 132
 133     if (ipib && ipib->flags & DIAG308_FLAGS_LP_VALID) {
 134         memcpy(&read_info->loadparm, &ipib->loadparm,
 135                sizeof(read_info->loadparm));
 136     } else {
 137         s390_ipl_set_loadparm(read_info->loadparm);
 138     }
 139
 140     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
 141 }
 142
 143 static void read_storage_element0_info(SCLPDevice *sclp, SCCB *sccb)
 144 {
 145     int i, assigned;
 146     int subincrement_id = SCLP_STARTING_SUBINCREMENT_ID;
 147     ReadStorageElementInfo *storage_info = (ReadStorageElementInfo *) sccb;
 148     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
 149
 150     if (!mhd) {
 151         sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
 152         return;
 153     }
 154
 155     if ((ram_size >> mhd->increment_size) >= 0x10000) {
 156         sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
 157         return;
 158     }
 159
 160     /* Return information regarding core memory */
 161     storage_info->max_id = cpu_to_be16(mhd->standby_mem_size ? 1 : 0);
 162     assigned = ram_size >> mhd->increment_size;
 163     storage_info->assigned = cpu_to_be16(assigned);
 164
 165     for (i = 0; i < assigned; i++) {
 166         storage_info->entries[i] = cpu_to_be32(subincrement_id);
 167         subincrement_id += SCLP_INCREMENT_UNIT;
 168     }
 169     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
 170 }
 171
 172 static void read_storage_element1_info(SCLPDevice *sclp, SCCB *sccb)
 173 {
 174     ReadStorageElementInfo *storage_info = (ReadStorageElementInfo *) sccb;
 175     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
 176
 177     if (!mhd) {
 178         sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
 179         return;
 180     }
 181
 182     if ((mhd->standby_mem_size >> mhd->increment_size) >= 0x10000) {
 183         sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
 184         return;
 185     }
 186
 187     /* Return information regarding standby memory */
 188     storage_info->max_id = cpu_to_be16(mhd->standby_mem_size ? 1 : 0);
 189     storage_info->assigned = cpu_to_be16(mhd->standby_mem_size >>
 190                                          mhd->increment_size);
 191     storage_info->standby = cpu_to_be16(mhd->standby_mem_size >>
 192                                         mhd->increment_size);
 193     sccb->h.response_code = cpu_to_be16(SCLP_RC_STANDBY_READ_COMPLETION);
 194 }
 195
 196 static void attach_storage_element(SCLPDevice *sclp, SCCB *sccb,
 197                                    uint16_t element)
 198 {
 199     int i, assigned, subincrement_id;
 200     AttachStorageElement *attach_info = (AttachStorageElement *) sccb;
 201     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
 202
 203     if (!mhd) {
 204         sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
 205         return;
 206     }
 207
 208     if (element != 1) {
 209         sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
 210         return;
 211     }
 212
 213     assigned = mhd->standby_mem_size >> mhd->increment_size;
 214     attach_info->assigned = cpu_to_be16(assigned);
 215     subincrement_id = ((ram_size >> mhd->increment_size) << 16)
 216                       + SCLP_STARTING_SUBINCREMENT_ID;
 217     for (i = 0; i < assigned; i++) {
 218         attach_info->entries[i] = cpu_to_be32(subincrement_id);
 219         subincrement_id += SCLP_INCREMENT_UNIT;
 220     }
 221     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION);
 222 }
 223
 224 static void assign_storage(SCLPDevice *sclp, SCCB *sccb)
 225 {
 226     MemoryRegion *mr = NULL;
 227     uint64_t this_subregion_size;
 228     AssignStorage *assign_info = (AssignStorage *) sccb;
 229     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
 230     ram_addr_t assign_addr;
 231     MemoryRegion *sysmem = get_system_memory();
 232
 233     if (!mhd) {
 234         sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
 235         return;
 236     }
 237     assign_addr = (assign_info->rn - 1) * mhd->rzm;
 238
 239     if ((assign_addr % MEM_SECTION_SIZE == 0) &&
 240         (assign_addr >= mhd->padded_ram_size)) {
 241         /* Re-use existing memory region if found */
 242         mr = memory_region_find(sysmem, assign_addr, 1).mr;
 243         memory_region_unref(mr);
 244         if (!mr) {
 245
 246             MemoryRegion *standby_ram = g_new(MemoryRegion, 1);
 247
 248             /* offset to align to standby_subregion_size for allocation */
 249             ram_addr_t offset = assign_addr -
 250                                 (assign_addr - mhd->padded_ram_size)
 251                                 % mhd->standby_subregion_size;
 252
 253             /* strlen("standby.ram") + 4 (Max of KVM_MEMORY_SLOTS) +  NULL */
 254             char id[16];
 255             snprintf(id, 16, "standby.ram%d",
 256                      (int)((offset - mhd->padded_ram_size) /
 257                      mhd->standby_subregion_size) + 1);
 258
 259             /* Allocate a subregion of the calculated standby_subregion_size */
 260             if (offset + mhd->standby_subregion_size >
 261                 mhd->padded_ram_size + mhd->standby_mem_size) {
 262                 this_subregion_size = mhd->padded_ram_size +
 263                   mhd->standby_mem_size - offset;
 264             } else {
 265                 this_subregion_size = mhd->standby_subregion_size;
 266             }
 267
 268             memory_region_init_ram(standby_ram, NULL, id, this_subregion_size,
 269                                    &error_fatal);
 270             /* This is a hack to make memory hotunplug work again. Once we have
 271              * subdevices, we have to unparent them when unassigning memory,
 272              * instead of doing it via the ref count of the MemoryRegion. */
 273             object_ref(OBJECT(standby_ram));
 274             object_unparent(OBJECT(standby_ram));
 275             memory_region_add_subregion(sysmem, offset, standby_ram);
 276         }
 277         /* The specified subregion is no longer in standby */
 278         mhd->standby_state_map[(assign_addr - mhd->padded_ram_size)
 279                                / MEM_SECTION_SIZE] = 1;
 280     }
 281     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION);
 282 }
 283
 284 static void unassign_storage(SCLPDevice *sclp, SCCB *sccb)
 285 {
 286     MemoryRegion *mr = NULL;
 287     AssignStorage *assign_info = (AssignStorage *) sccb;
 288     sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
 289     ram_addr_t unassign_addr;
 290     MemoryRegion *sysmem = get_system_memory();
 291
 292     if (!mhd) {
 293         sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
 294         return;
 295     }
 296     unassign_addr = (assign_info->rn - 1) * mhd->rzm;
 297
 298     /* if the addr is a multiple of 256 MB */
 299     if ((unassign_addr % MEM_SECTION_SIZE == 0) &&
 300         (unassign_addr >= mhd->padded_ram_size)) {
 301         mhd->standby_state_map[(unassign_addr -
 302                            mhd->padded_ram_size) / MEM_SECTION_SIZE] = 0;
 303
 304         /* find the specified memory region and destroy it */
 305         mr = memory_region_find(sysmem, unassign_addr, 1).mr;
 306         memory_region_unref(mr);
 307         if (mr) {
 308             int i;
 309             int is_removable = 1;
 310             ram_addr_t map_offset = (unassign_addr - mhd->padded_ram_size -
 311                                      (unassign_addr - mhd->padded_ram_size)
 312                                      % mhd->standby_subregion_size);
 313             /* Mark all affected subregions as 'standby' once again */
 314             for (i = 0;
 315                  i < (mhd->standby_subregion_size / MEM_SECTION_SIZE);
 316                  i++) {
 317
 318                 if (mhd->standby_state_map[i + map_offset / MEM_SECTION_SIZE]) {
 319                     is_removable = 0;
 320                     break;
 321                 }
 322             }
 323             if (is_removable) {
 324                 memory_region_del_subregion(sysmem, mr);
 325                 object_unref(OBJECT(mr));
 326             }
 327         }
 328     }
 329     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION);
 330 }
 331
 332 /* Provide information about the CPU */
 333 static void sclp_read_cpu_info(SCLPDevice *sclp, SCCB *sccb)
 334 {
 335     ReadCpuInfo *cpu_info = (ReadCpuInfo *) sccb;
 336     CPUState *cpu;
 337     int cpu_count = 0;
 338
 339     CPU_FOREACH(cpu) {
 340         cpu_count++;
 341     }
 342
 343     cpu_info->nr_configured = cpu_to_be16(cpu_count);
 344     cpu_info->offset_configured = cpu_to_be16(offsetof(ReadCpuInfo, entries));
 345     cpu_info->nr_standby = cpu_to_be16(0);
 346
 347     /* The standby offset is 16-byte for each CPU */
 348     cpu_info->offset_standby = cpu_to_be16(cpu_info->offset_configured
 349         + cpu_info->nr_configured*sizeof(CPUEntry));
 350
 351     prepare_cpu_entries(sclp, cpu_info->entries, cpu_count);
 352
 353     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
 354 }
 355
 356 static void sclp_configure_io_adapter(SCLPDevice *sclp, SCCB *sccb,
 357                                       bool configure)
 358 {
 359     int rc;
 360
 361     if (be16_to_cpu(sccb->h.length) < 16) {
 362         rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
 363         goto out_err;
 364     }
 365
 366     switch (((IoaCfgSccb *)sccb)->atype) {
 367     case SCLP_RECONFIG_PCI_ATYPE:
 368         if (s390_has_feat(S390_FEAT_ZPCI)) {
 369             if (configure) {
 370                 s390_pci_sclp_configure(sccb);
 371             } else {
 372                 s390_pci_sclp_deconfigure(sccb);
 373             }
 374             return;
 375         }
 376         /* fallthrough */
 377     default:
 378         rc = SCLP_RC_ADAPTER_TYPE_NOT_RECOGNIZED;
 379     }
 380
 381  out_err:
 382     sccb->h.response_code = cpu_to_be16(rc);
 383 }
 384
 385 static void sclp_execute(SCLPDevice *sclp, SCCB *sccb, uint32_t code)
 386 {
 387     SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
 388     SCLPEventFacility *ef = sclp->event_facility;
 389     SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
 390
 391     switch (code & SCLP_CMD_CODE_MASK) {
 392     case SCLP_CMDW_READ_SCP_INFO:
 393     case SCLP_CMDW_READ_SCP_INFO_FORCED:
 394         sclp_c->read_SCP_info(sclp, sccb);
 395         break;
 396     case SCLP_CMDW_READ_CPU_INFO:
 397         sclp_c->read_cpu_info(sclp, sccb);
 398         break;
 399     case SCLP_READ_STORAGE_ELEMENT_INFO:
 400         if (code & 0xff00) {
 401             sclp_c->read_storage_element1_info(sclp, sccb);
 402         } else {
 403             sclp_c->read_storage_element0_info(sclp, sccb);
 404         }
 405         break;
 406     case SCLP_ATTACH_STORAGE_ELEMENT:
 407         sclp_c->attach_storage_element(sclp, sccb, (code & 0xff00) >> 8);
 408         break;
 409     case SCLP_ASSIGN_STORAGE:
 410         sclp_c->assign_storage(sclp, sccb);
 411         break;
 412     case SCLP_UNASSIGN_STORAGE:
 413         sclp_c->unassign_storage(sclp, sccb);
 414         break;
 415     case SCLP_CMDW_CONFIGURE_IOA:
 416         sclp_configure_io_adapter(sclp, sccb, true);
 417         break;
 418     case SCLP_CMDW_DECONFIGURE_IOA:
 419         sclp_configure_io_adapter(sclp, sccb, false);
 420         break;
 421     default:
 422         efc->command_handler(ef, sccb, code);
 423         break;
 424     }
 425 }
 426
 427 int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
 428 {
 429     SCLPDevice *sclp = get_sclp_device();
 430     SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
 431     int r = 0;
 432     SCCB work_sccb;
 433
 434     hwaddr sccb_len = sizeof(SCCB);
 435
 436     /* first some basic checks on program checks */
 437     if (env->psw.mask & PSW_MASK_PSTATE) {
 438         r = -PGM_PRIVILEGED;
 439         goto out;
 440     }
 441     if (cpu_physical_memory_is_io(sccb)) {
 442         r = -PGM_ADDRESSING;
 443         goto out;
 444     }
 445     if ((sccb & ~0x1fffUL) == 0 || (sccb & ~0x1fffUL) == env->psa
 446         || (sccb & ~0x7ffffff8UL) != 0) {
 447         r = -PGM_SPECIFICATION;
 448         goto out;
 449     }
 450
 451     /*
 452      * we want to work on a private copy of the sccb, to prevent guests
 453      * from playing dirty tricks by modifying the memory content after
 454      * the host has checked the values
 455      */
 456     cpu_physical_memory_read(sccb, &work_sccb, sccb_len);
 457
 458     /* Valid sccb sizes */
 459     if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader) ||
 460         be16_to_cpu(work_sccb.h.length) > SCCB_SIZE) {
 461         r = -PGM_SPECIFICATION;
 462         goto out;
 463     }
 464
 465     sclp_c->execute(sclp, &work_sccb, code);
 466
 467     cpu_physical_memory_write(sccb, &work_sccb,
 468                               be16_to_cpu(work_sccb.h.length));
 469
 470     sclp_c->service_interrupt(sclp, sccb);
 471
 472 out:
 473     return r;
 474 }
 475
 476 static void service_interrupt(SCLPDevice *sclp, uint32_t sccb)
 477 {
 478     SCLPEventFacility *ef = sclp->event_facility;
 479     SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
 480
 481     uint32_t param = sccb & ~3;
 482
 483     /* Indicate whether an event is still pending */
 484     param |= efc->event_pending(ef) ? 1 : 0;
 485
 486     if (!param) {
 487         /* No need to send an interrupt, there's nothing to be notified about */
 488         return;
 489     }
 490     s390_sclp_extint(param);
 491 }
 492
 493 void sclp_service_interrupt(uint32_t sccb)
 494 {
 495     SCLPDevice *sclp = get_sclp_device();
 496     SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
 497
 498     sclp_c->service_interrupt(sclp, sccb);
 499 }
 500
 501 /* qemu object creation and initialization functions */
 502
 503 void s390_sclp_init(void)
 504 {
 505     Object *new = object_new(TYPE_SCLP);
 506
 507     object_property_add_child(qdev_get_machine(), TYPE_SCLP, new,
 508                               NULL);
 509     object_unref(OBJECT(new));
 510     qdev_init_nofail(DEVICE(new));
 511 }
 512
 513 static void sclp_realize(DeviceState *dev, Error **errp)
 514 {
 515     MachineState *machine = MACHINE(qdev_get_machine());
 516     SCLPDevice *sclp = SCLP(dev);
 517     Error *err = NULL;
 518     uint64_t hw_limit;
 519     int ret;
 520
 521     object_property_set_bool(OBJECT(sclp->event_facility), true, "realized",
 522                              &err);
 523     if (err) {
 524         goto out;
 525     }
 526     /*
 527      * qdev_device_add searches the sysbus for TYPE_SCLP_EVENTS_BUS. As long
 528      * as we can't find a fitting bus via the qom tree, we have to add the
 529      * event facility to the sysbus, so e.g. a sclp console can be created.
 530      */
 531     qdev_set_parent_bus(DEVICE(sclp->event_facility), sysbus_get_default());
 532
 533     ret = s390_set_memory_limit(machine->maxram_size, &hw_limit);
 534     if (ret == -E2BIG) {
 535         error_setg(&err, "host supports a maximum of %" PRIu64 " GB",
 536                    hw_limit >> 30);
 537     } else if (ret) {
 538         error_setg(&err, "setting the guest size failed");
 539     }
 540
 541 out:
 542     error_propagate(errp, err);
 543 }
 544
 545 static void sclp_memory_init(SCLPDevice *sclp)
 546 {
 547     MachineState *machine = MACHINE(qdev_get_machine());
 548     ram_addr_t initial_mem = machine->ram_size;
 549     ram_addr_t max_mem = machine->maxram_size;
 550     ram_addr_t standby_mem = max_mem - initial_mem;
 551     ram_addr_t pad_mem = 0;
 552     int increment_size = 20;
 553
 554     /* The storage increment size is a multiple of 1M and is a power of 2.
 555      * The number of storage increments must be MAX_STORAGE_INCREMENTS or fewer.
 556      * The variable 'increment_size' is an exponent of 2 that can be
 557      * used to calculate the size (in bytes) of an increment. */
 558     while ((initial_mem >> increment_size) > MAX_STORAGE_INCREMENTS) {
 559         increment_size++;
 560     }
 561     if (machine->ram_slots) {
 562         while ((standby_mem >> increment_size) > MAX_STORAGE_INCREMENTS) {
 563             increment_size++;
 564         }
 565     }
 566     sclp->increment_size = increment_size;
 567
 568     /* The core and standby memory areas need to be aligned with
 569      * the increment size.  In effect, this can cause the
 570      * user-specified memory size to be rounded down to align
 571      * with the nearest increment boundary. */
 572     initial_mem = initial_mem >> increment_size << increment_size;
 573     standby_mem = standby_mem >> increment_size << increment_size;
 574
 575     /* If the size of ram is not on a MEM_SECTION_SIZE boundary,
 576        calculate the pad size necessary to force this boundary. */
 577     if (machine->ram_slots && standby_mem) {
 578         sclpMemoryHotplugDev *mhd = init_sclp_memory_hotplug_dev();
 579
 580         if (initial_mem % MEM_SECTION_SIZE) {
 581             pad_mem = MEM_SECTION_SIZE - initial_mem % MEM_SECTION_SIZE;
 582         }
 583         mhd->increment_size = increment_size;
 584         mhd->pad_size = pad_mem;
 585         mhd->standby_mem_size = standby_mem;
 586     }
 587     machine->ram_size = initial_mem;
 588     machine->maxram_size = initial_mem + pad_mem + standby_mem;
 589     /* let's propagate the changed ram size into the global variable. */
 590     ram_size = initial_mem;
 591 }
 592
 593 static void sclp_init(Object *obj)
 594 {
 595     SCLPDevice *sclp = SCLP(obj);
 596     Object *new;
 597
 598     new = object_new(TYPE_SCLP_EVENT_FACILITY);
 599     object_property_add_child(obj, TYPE_SCLP_EVENT_FACILITY, new, NULL);
 600     object_unref(new);
 601     sclp->event_facility = EVENT_FACILITY(new);
 602
 603     sclp_memory_init(sclp);
 604 }
 605
 606 static void sclp_class_init(ObjectClass *oc, void *data)
 607 {
 608     SCLPDeviceClass *sc = SCLP_CLASS(oc);
 609     DeviceClass *dc = DEVICE_CLASS(oc);
 610
 611     dc->desc = "SCLP (Service-Call Logical Processor)";
 612     dc->realize = sclp_realize;
 613     dc->hotpluggable = false;
 614     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 615
 616     sc->read_SCP_info = read_SCP_info;
 617     sc->read_storage_element0_info = read_storage_element0_info;
 618     sc->read_storage_element1_info = read_storage_element1_info;
 619     sc->attach_storage_element = attach_storage_element;
 620     sc->assign_storage = assign_storage;
 621     sc->unassign_storage = unassign_storage;
 622     sc->read_cpu_info = sclp_read_cpu_info;
 623     sc->execute = sclp_execute;
 624     sc->service_interrupt = service_interrupt;
 625 }
 626
 627 static TypeInfo sclp_info = {
 628     .name = TYPE_SCLP,
 629     .parent = TYPE_DEVICE,
 630     .instance_init = sclp_init,
 631     .instance_size = sizeof(SCLPDevice),
 632     .class_init = sclp_class_init,
 633     .class_size = sizeof(SCLPDeviceClass),
 634 };
 635
 636 sclpMemoryHotplugDev *init_sclp_memory_hotplug_dev(void)
 637 {
 638     DeviceState *dev;
 639     dev = qdev_create(NULL, TYPE_SCLP_MEMORY_HOTPLUG_DEV);
 640     object_property_add_child(qdev_get_machine(),
 641                               TYPE_SCLP_MEMORY_HOTPLUG_DEV,
 642                               OBJECT(dev), NULL);
 643     qdev_init_nofail(dev);
 644     return SCLP_MEMORY_HOTPLUG_DEV(object_resolve_path(
 645                                    TYPE_SCLP_MEMORY_HOTPLUG_DEV, NULL));
 646 }
 647
 648 sclpMemoryHotplugDev *get_sclp_memory_hotplug_dev(void)
 649 {
 650     return SCLP_MEMORY_HOTPLUG_DEV(object_resolve_path(
 651                                    TYPE_SCLP_MEMORY_HOTPLUG_DEV, NULL));
 652 }
 653
 654 static void sclp_memory_hotplug_dev_class_init(ObjectClass *klass,
 655                                                void *data)
 656 {
 657     DeviceClass *dc = DEVICE_CLASS(klass);
 658
 659     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 660 }
 661
 662 static TypeInfo sclp_memory_hotplug_dev_info = {
 663     .name = TYPE_SCLP_MEMORY_HOTPLUG_DEV,
 664     .parent = TYPE_SYS_BUS_DEVICE,
 665     .instance_size = sizeof(sclpMemoryHotplugDev),
 666     .class_init = sclp_memory_hotplug_dev_class_init,
 667 };
 668
 669 static void register_types(void)
 670 {
 671     type_register_static(&sclp_memory_hotplug_dev_info);
 672     type_register_static(&sclp_info);
 673 }
 674 type_init(register_types);