LXR qemu/hw/ppc/spapr

   1/*
   2 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
   3 *
   4 * Hypercall based emulated RTAS
   5 *
   6 * Copyright (c) 2010-2011 David Gibson, IBM Corporation.
   7 *
   8 * Permission is hereby granted, free of charge, to any person obtaining a copy
   9 * of this software and associated documentation files (the "Software"), to deal
  10 * in the Software without restriction, including without limitation the rights
  11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12 * copies of the Software, and to permit persons to whom the Software is
  13 * furnished to do so, subject to the following conditions:
  14 *
  15 * The above copyright notice and this permission notice shall be included in
  16 * all copies or substantial portions of the Software.
  17 *
  18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24 * THE SOFTWARE.
  25 *
  26 */
  27
  28#include "qemu/osdep.h"
  29#include "cpu.h"
  30#include "qemu/log.h"
  31#include "qemu/error-report.h"
  32#include "sysemu/sysemu.h"
  33#include "sysemu/device_tree.h"
  34#include "sysemu/cpus.h"
  35#include "sysemu/hw_accel.h"
  36#include "sysemu/runstate.h"
  37#include "kvm_ppc.h"
  38
  39#include "hw/ppc/spapr.h"
  40#include "hw/ppc/spapr_vio.h"
  41#include "hw/ppc/spapr_rtas.h"
  42#include "hw/ppc/spapr_cpu_core.h"
  43#include "hw/ppc/ppc.h"
  44#include "hw/boards.h"
  45
  46#include <libfdt.h>
  47#include "hw/ppc/spapr_drc.h"
  48#include "qemu/cutils.h"
  49#include "trace.h"
  50#include "hw/ppc/fdt.h"
  51#include "target/ppc/mmu-hash64.h"
  52#include "target/ppc/mmu-book3s-v3.h"
  53#include "migration/blocker.h"
  54
  55static void rtas_display_character(PowerPCCPU *cpu, SpaprMachineState *spapr,
  56                                   uint32_t token, uint32_t nargs,
  57                                   target_ulong args,
  58                                   uint32_t nret, target_ulong rets)
  59{
  60    uint8_t c = rtas_ld(args, 0);
  61    SpaprVioDevice *sdev = vty_lookup(spapr, 0);
  62
  63    if (!sdev) {
  64        rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
  65    } else {
  66        vty_putchars(sdev, &c, sizeof(c));
  67        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
  68    }
  69}
  70
  71static void rtas_power_off(PowerPCCPU *cpu, SpaprMachineState *spapr,
  72                           uint32_t token, uint32_t nargs, target_ulong args,
  73                           uint32_t nret, target_ulong rets)
  74{
  75    if (nargs != 2 || nret != 1) {
  76        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
  77        return;
  78    }
  79    qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
  80    cpu_stop_current();
  81    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
  82}
  83
  84static void rtas_system_reboot(PowerPCCPU *cpu, SpaprMachineState *spapr,
  85                               uint32_t token, uint32_t nargs,
  86                               target_ulong args,
  87                               uint32_t nret, target_ulong rets)
  88{
  89    if (nargs != 0 || nret != 1) {
  90        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
  91        return;
  92    }
  93    qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
  94    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
  95}
  96
  97static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
  98                                         SpaprMachineState *spapr,
  99                                         uint32_t token, uint32_t nargs,
 100                                         target_ulong args,
 101                                         uint32_t nret, target_ulong rets)
 102{
 103    target_ulong id;
 104    PowerPCCPU *cpu;
 105
 106    if (nargs != 1 || nret != 2) {
 107        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 108        return;
 109    }
 110
 111    id = rtas_ld(args, 0);
 112    cpu = spapr_find_cpu(id);
 113    if (cpu != NULL) {
 114        if (CPU(cpu)->halted) {
 115            rtas_st(rets, 1, 0);
 116        } else {
 117            rtas_st(rets, 1, 2);
 118        }
 119
 120        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 121        return;
 122    }
 123
 124    /* Didn't find a matching cpu */
 125    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 126}
 127
 128static void rtas_start_cpu(PowerPCCPU *callcpu, SpaprMachineState *spapr,
 129                           uint32_t token, uint32_t nargs,
 130                           target_ulong args,
 131                           uint32_t nret, target_ulong rets)
 132{
 133    target_ulong id, start, r3;
 134    PowerPCCPU *newcpu;
 135    CPUPPCState *env;
 136    PowerPCCPUClass *pcc;
 137    target_ulong lpcr;
 138
 139    if (nargs != 3 || nret != 1) {
 140        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 141        return;
 142    }
 143
 144    id = rtas_ld(args, 0);
 145    start = rtas_ld(args, 1);
 146    r3 = rtas_ld(args, 2);
 147
 148    newcpu = spapr_find_cpu(id);
 149    if (!newcpu) {
 150        /* Didn't find a matching cpu */
 151        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 152        return;
 153    }
 154
 155    env = &newcpu->env;
 156    pcc = POWERPC_CPU_GET_CLASS(newcpu);
 157
 158    if (!CPU(newcpu)->halted) {
 159        rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
 160        return;
 161    }
 162
 163    cpu_synchronize_state(CPU(newcpu));
 164
 165    env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
 166
 167    /* Enable Power-saving mode Exit Cause exceptions for the new CPU */
 168    lpcr = env->spr[SPR_LPCR];
 169    if (!pcc->interrupts_big_endian(callcpu)) {
 170        lpcr |= LPCR_ILE;
 171    }
 172    if (env->mmu_model == POWERPC_MMU_3_00) {
 173        /*
 174         * New cpus are expected to start in the same radix/hash mode
 175         * as the existing CPUs
 176         */
 177        if (ppc64_v3_radix(callcpu)) {
 178            lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR;
 179        } else {
 180            lpcr &= ~(LPCR_UPRT | LPCR_GTSE | LPCR_HR);
 181        }
 182        env->spr[SPR_PSSCR] &= ~PSSCR_EC;
 183    }
 184    ppc_store_lpcr(newcpu, lpcr);
 185
 186    /*
 187     * Set the timebase offset of the new CPU to that of the invoking
 188     * CPU.  This helps hotplugged CPU to have the correct timebase
 189     * offset.
 190     */
 191    newcpu->env.tb_env->tb_offset = callcpu->env.tb_env->tb_offset;
 192
 193    spapr_cpu_set_entry_state(newcpu, start, 0, r3, 0);
 194
 195    qemu_cpu_kick(CPU(newcpu));
 196
 197    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 198}
 199
 200static void rtas_stop_self(PowerPCCPU *cpu, SpaprMachineState *spapr,
 201                           uint32_t token, uint32_t nargs,
 202                           target_ulong args,
 203                           uint32_t nret, target_ulong rets)
 204{
 205    CPUState *cs = CPU(cpu);
 206    CPUPPCState *env = &cpu->env;
 207    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
 208
 209    /* Disable Power-saving mode Exit Cause exceptions for the CPU.
 210     * This could deliver an interrupt on a dying CPU and crash the
 211     * guest.
 212     * For the same reason, set PSSCR_EC.
 213     */
 214    ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm);
 215    env->spr[SPR_PSSCR] |= PSSCR_EC;
 216    cs->halted = 1;
 217    kvmppc_set_reg_ppc_online(cpu, 0);
 218    qemu_cpu_kick(cs);
 219}
 220
 221static void rtas_ibm_suspend_me(PowerPCCPU *cpu, SpaprMachineState *spapr,
 222                           uint32_t token, uint32_t nargs,
 223                           target_ulong args,
 224                           uint32_t nret, target_ulong rets)
 225{
 226    CPUState *cs;
 227
 228    if (nargs != 0 || nret != 1) {
 229        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 230        return;
 231    }
 232
 233    CPU_FOREACH(cs) {
 234        PowerPCCPU *c = POWERPC_CPU(cs);
 235        CPUPPCState *e = &c->env;
 236        if (c == cpu) {
 237            continue;
 238        }
 239
 240        /* See h_join */
 241        if (!cs->halted || (e->msr & (1ULL << MSR_EE))) {
 242            rtas_st(rets, 0, H_MULTI_THREADS_ACTIVE);
 243            return;
 244        }
 245    }
 246
 247    qemu_system_suspend_request();
 248    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 249}
 250
 251static inline int sysparm_st(target_ulong addr, target_ulong len,
 252                             const void *val, uint16_t vallen)
 253{
 254    hwaddr phys = ppc64_phys_to_real(addr);
 255
 256    if (len < 2) {
 257        return RTAS_OUT_SYSPARM_PARAM_ERROR;
 258    }
 259    stw_be_phys(&address_space_memory, phys, vallen);
 260    cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen));
 261    return RTAS_OUT_SUCCESS;
 262}
 263
 264static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
 265                                          SpaprMachineState *spapr,
 266                                          uint32_t token, uint32_t nargs,
 267                                          target_ulong args,
 268                                          uint32_t nret, target_ulong rets)
 269{
 270    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
 271    MachineState *ms = MACHINE(spapr);
 272    target_ulong parameter = rtas_ld(args, 0);
 273    target_ulong buffer = rtas_ld(args, 1);
 274    target_ulong length = rtas_ld(args, 2);
 275    target_ulong ret;
 276
 277    switch (parameter) {
 278    case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
 279        char *param_val = g_strdup_printf("MaxEntCap=%d,"
 280                                          "DesMem=%" PRIu64 ","
 281                                          "DesProcs=%d,"
 282                                          "MaxPlatProcs=%d",
 283                                          ms->smp.max_cpus,
 284                                          ms->ram_size / MiB,
 285                                          ms->smp.cpus,
 286                                          ms->smp.max_cpus);
 287        if (pcc->n_host_threads > 0) {
 288            char *hostthr_val, *old = param_val;
 289
 290            /*
 291             * Add HostThrs property. This property is not present in PAPR but
 292             * is expected by some guests to communicate the number of physical
 293             * host threads per core on the system so that they can scale
 294             * information which varies based on the thread configuration.
 295             */
 296            hostthr_val = g_strdup_printf(",HostThrs=%d", pcc->n_host_threads);
 297            param_val = g_strconcat(param_val, hostthr_val, NULL);
 298            g_free(hostthr_val);
 299            g_free(old);
 300        }
 301        ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
 302        g_free(param_val);
 303        break;
 304    }
 305    case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
 306        uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
 307
 308        ret = sysparm_st(buffer, length, &param_val, sizeof(param_val));
 309        break;
 310    }
 311    case RTAS_SYSPARM_UUID:
 312        ret = sysparm_st(buffer, length, (unsigned char *)&qemu_uuid,
 313                         (qemu_uuid_set ? 16 : 0));
 314        break;
 315    default:
 316        ret = RTAS_OUT_NOT_SUPPORTED;
 317    }
 318
 319    rtas_st(rets, 0, ret);
 320}
 321
 322static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
 323                                          SpaprMachineState *spapr,
 324                                          uint32_t token, uint32_t nargs,
 325                                          target_ulong args,
 326                                          uint32_t nret, target_ulong rets)
 327{
 328    target_ulong parameter = rtas_ld(args, 0);
 329    target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
 330
 331    switch (parameter) {
 332    case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS:
 333    case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
 334    case RTAS_SYSPARM_UUID:
 335        ret = RTAS_OUT_NOT_AUTHORIZED;
 336        break;
 337    }
 338
 339    rtas_st(rets, 0, ret);
 340}
 341
 342static void rtas_ibm_os_term(PowerPCCPU *cpu,
 343                            SpaprMachineState *spapr,
 344                            uint32_t token, uint32_t nargs,
 345                            target_ulong args,
 346                            uint32_t nret, target_ulong rets)
 347{
 348    target_ulong msgaddr = rtas_ld(args, 0);
 349    char msg[512];
 350
 351    cpu_physical_memory_read(msgaddr, msg, sizeof(msg) - 1);
 352    msg[sizeof(msg) - 1] = 0;
 353
 354    error_report("OS terminated: %s", msg);
 355    qemu_system_guest_panicked(NULL);
 356
 357    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 358}
 359
 360static void rtas_set_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
 361                                 uint32_t token, uint32_t nargs,
 362                                 target_ulong args, uint32_t nret,
 363                                 target_ulong rets)
 364{
 365    int32_t power_domain;
 366
 367    if (nargs != 2 || nret != 2) {
 368        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 369        return;
 370    }
 371
 372    /* we currently only use a single, "live insert" powerdomain for
 373     * hotplugged/dlpar'd resources, so the power is always live/full (100)
 374     */
 375    power_domain = rtas_ld(args, 0);
 376    if (power_domain != -1) {
 377        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 378        return;
 379    }
 380
 381    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 382    rtas_st(rets, 1, 100);
 383}
 384
 385static void rtas_get_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
 386                                  uint32_t token, uint32_t nargs,
 387                                  target_ulong args, uint32_t nret,
 388                                  target_ulong rets)
 389{
 390    int32_t power_domain;
 391
 392    if (nargs != 1 || nret != 2) {
 393        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 394        return;
 395    }
 396
 397    /* we currently only use a single, "live insert" powerdomain for
 398     * hotplugged/dlpar'd resources, so the power is always live/full (100)
 399     */
 400    power_domain = rtas_ld(args, 0);
 401    if (power_domain != -1) {
 402        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 403        return;
 404    }
 405
 406    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 407    rtas_st(rets, 1, 100);
 408}
 409
 410static void rtas_ibm_nmi_register(PowerPCCPU *cpu,
 411                                  SpaprMachineState *spapr,
 412                                  uint32_t token, uint32_t nargs,
 413                                  target_ulong args,
 414                                  uint32_t nret, target_ulong rets)
 415{
 416    hwaddr rtas_addr;
 417    target_ulong sreset_addr, mce_addr;
 418
 419    if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
 420        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 421        return;
 422    }
 423
 424    rtas_addr = spapr_get_rtas_addr();
 425    if (!rtas_addr) {
 426        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 427        return;
 428    }
 429
 430    sreset_addr = rtas_ld(args, 0);
 431    mce_addr = rtas_ld(args, 1);
 432
 433    /* PAPR requires these are in the first 32M of memory and within RMA */
 434    if (sreset_addr >= 32 * MiB || sreset_addr >= spapr->rma_size ||
 435           mce_addr >= 32 * MiB ||    mce_addr >= spapr->rma_size) {
 436        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 437        return;
 438    }
 439
 440    if (kvm_enabled()) {
 441        if (kvmppc_set_fwnmi() < 0) {
 442            rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 443            return;
 444        }
 445    }
 446
 447    spapr->fwnmi_system_reset_addr = sreset_addr;
 448    spapr->fwnmi_machine_check_addr = mce_addr;
 449
 450    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 451}
 452
 453static void rtas_ibm_nmi_interlock(PowerPCCPU *cpu,
 454                                   SpaprMachineState *spapr,
 455                                   uint32_t token, uint32_t nargs,
 456                                   target_ulong args,
 457                                   uint32_t nret, target_ulong rets)
 458{
 459    if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
 460        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 461        return;
 462    }
 463
 464    if (spapr->fwnmi_machine_check_addr == -1) {
 465        qemu_log_mask(LOG_GUEST_ERROR,
 466"FWNMI: ibm,nmi-interlock RTAS called with FWNMI not registered.\n");
 467
 468        /* NMI register not called */
 469        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 470        return;
 471    }
 472
 473    if (spapr->fwnmi_machine_check_interlock != cpu->vcpu_id) {
 474        /*
 475         * The vCPU that hit the NMI should invoke "ibm,nmi-interlock"
 476         * This should be PARAM_ERROR, but Linux calls "ibm,nmi-interlock"
 477         * for system reset interrupts, despite them not being interlocked.
 478         * PowerVM silently ignores this and returns success here. Returning
 479         * failure causes Linux to print the error "FWNMI: nmi-interlock
 480         * failed: -3", although no other apparent ill effects, this is a
 481         * regression for the user when enabling FWNMI. So for now, match
 482         * PowerVM. When most Linux clients are fixed, this could be
 483         * changed.
 484         */
 485        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 486        return;
 487    }
 488
 489    /*
 490     * vCPU issuing "ibm,nmi-interlock" is done with NMI handling,
 491     * hence unset fwnmi_machine_check_interlock.
 492     */
 493    spapr->fwnmi_machine_check_interlock = -1;
 494    qemu_cond_signal(&spapr->fwnmi_machine_check_interlock_cond);
 495    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 496    migrate_del_blocker(spapr->fwnmi_migration_blocker);
 497}
 498
 499static struct rtas_call {
 500    const char *name;
 501    spapr_rtas_fn fn;
 502} rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
 503
 504target_ulong spapr_rtas_call(PowerPCCPU *cpu, SpaprMachineState *spapr,
 505                             uint32_t token, uint32_t nargs, target_ulong args,
 506                             uint32_t nret, target_ulong rets)
 507{
 508    if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
 509        struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);
 510
 511        if (call->fn) {
 512            call->fn(cpu, spapr, token, nargs, args, nret, rets);
 513            return H_SUCCESS;
 514        }
 515    }
 516
 517    /* HACK: Some Linux early debug code uses RTAS display-character,
 518     * but assumes the token value is 0xa (which it is on some real
 519     * machines) without looking it up in the device tree.  This
 520     * special case makes this work */
 521    if (token == 0xa) {
 522        rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
 523        return H_SUCCESS;
 524    }
 525
 526    hcall_dprintf("Unknown RTAS token 0x%x\n", token);
 527    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 528    return H_PARAMETER;
 529}
 530
 531uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
 532                         uint32_t nret, uint64_t rets)
 533{
 534    int token;
 535
 536    for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) {
 537        if (strcmp(cmd, rtas_table[token].name) == 0) {
 538            SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 539            PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
 540
 541            rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE,
 542                                 nargs, args, nret, rets);
 543            return H_SUCCESS;
 544        }
 545    }
 546    return H_PARAMETER;
 547}
 548
 549void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
 550{
 551    assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));
 552
 553    token -= RTAS_TOKEN_BASE;
 554
 555    assert(!name || !rtas_table[token].name);
 556
 557    rtas_table[token].name = name;
 558    rtas_table[token].fn = fn;
 559}
 560
 561void spapr_dt_rtas_tokens(void *fdt, int rtas)
 562{
 563    int i;
 564
 565    for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
 566        struct rtas_call *call = &rtas_table[i];
 567
 568        if (!call->name) {
 569            continue;
 570        }
 571
 572        _FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE));
 573    }
 574}
 575
 576hwaddr spapr_get_rtas_addr(void)
 577{
 578    SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 579    int rtas_node;
 580    const fdt32_t *rtas_data;
 581    void *fdt = spapr->fdt_blob;
 582
 583    /* fetch rtas addr from fdt */
 584    rtas_node = fdt_path_offset(fdt, "/rtas");
 585    if (rtas_node < 0) {
 586        return 0;
 587    }
 588
 589    rtas_data = fdt_getprop(fdt, rtas_node, "linux,rtas-base", NULL);
 590    if (!rtas_data) {
 591        return 0;
 592    }
 593
 594    /*
 595     * We assume that the OS called RTAS instantiate-rtas, but some other
 596     * OS might call RTAS instantiate-rtas-64 instead. This fine as of now
 597     * as SLOF only supports 32-bit variant.
 598     */
 599    return (hwaddr)fdt32_to_cpu(*rtas_data);
 600}
 601
 602static void core_rtas_register_types(void)
 603{
 604    spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
 605                        rtas_display_character);
 606    spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
 607    spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
 608                        rtas_system_reboot);
 609    spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
 610                        rtas_query_cpu_stopped_state);
 611    spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
 612    spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
 613    spapr_rtas_register(RTAS_IBM_SUSPEND_ME, "ibm,suspend-me",
 614                        rtas_ibm_suspend_me);
 615    spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
 616                        "ibm,get-system-parameter",
 617                        rtas_ibm_get_system_parameter);
 618    spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
 619                        "ibm,set-system-parameter",
 620                        rtas_ibm_set_system_parameter);
 621    spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
 622                        rtas_ibm_os_term);
 623    spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
 624                        rtas_set_power_level);
 625    spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
 626                        rtas_get_power_level);
 627    spapr_rtas_register(RTAS_IBM_NMI_REGISTER, "ibm,nmi-register",
 628                        rtas_ibm_nmi_register);
 629    spapr_rtas_register(RTAS_IBM_NMI_INTERLOCK, "ibm,nmi-interlock",
 630                        rtas_ibm_nmi_interlock);
 631}
 632
 633type_init(core_rtas_register_types)
 634