qemu/hw/ppc/spapr_rtas.c
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   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 "qemu/log.h"
  30#include "qemu/error-report.h"
  31#include "sysemu/sysemu.h"
  32#include "sysemu/device_tree.h"
  33#include "sysemu/cpus.h"
  34#include "sysemu/hw_accel.h"
  35#include "sysemu/runstate.h"
  36#include "kvm_ppc.h"
  37
  38#include "hw/ppc/spapr.h"
  39#include "hw/ppc/spapr_vio.h"
  40#include "hw/ppc/spapr_rtas.h"
  41#include "hw/ppc/spapr_cpu_core.h"
  42#include "hw/ppc/ppc.h"
  43
  44#include <libfdt.h>
  45#include "hw/ppc/spapr_drc.h"
  46#include "qemu/cutils.h"
  47#include "trace.h"
  48#include "hw/ppc/fdt.h"
  49#include "target/ppc/mmu-hash64.h"
  50#include "target/ppc/mmu-book3s-v3.h"
  51#include "migration/blocker.h"
  52#include "helper_regs.h"
  53
  54static void rtas_display_character(PowerPCCPU *cpu, SpaprMachineState *spapr,
  55                                   uint32_t token, uint32_t nargs,
  56                                   target_ulong args,
  57                                   uint32_t nret, target_ulong rets)
  58{
  59    uint8_t c = rtas_ld(args, 0);
  60    SpaprVioDevice *sdev = vty_lookup(spapr, 0);
  61
  62    if (!sdev) {
  63        rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
  64    } else {
  65        vty_putchars(sdev, &c, sizeof(c));
  66        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
  67    }
  68}
  69
  70static void rtas_power_off(PowerPCCPU *cpu, SpaprMachineState *spapr,
  71                           uint32_t token, uint32_t nargs, target_ulong args,
  72                           uint32_t nret, target_ulong rets)
  73{
  74    if (nargs != 2 || nret != 1) {
  75        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
  76        return;
  77    }
  78    qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
  79    cpu_stop_current();
  80    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
  81}
  82
  83static void rtas_system_reboot(PowerPCCPU *cpu, SpaprMachineState *spapr,
  84                               uint32_t token, uint32_t nargs,
  85                               target_ulong args,
  86                               uint32_t nret, target_ulong rets)
  87{
  88    if (nargs != 0 || nret != 1) {
  89        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
  90        return;
  91    }
  92    qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
  93    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
  94}
  95
  96static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
  97                                         SpaprMachineState *spapr,
  98                                         uint32_t token, uint32_t nargs,
  99                                         target_ulong args,
 100                                         uint32_t nret, target_ulong rets)
 101{
 102    target_ulong id;
 103    PowerPCCPU *cpu;
 104
 105    if (nargs != 1 || nret != 2) {
 106        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 107        return;
 108    }
 109
 110    id = rtas_ld(args, 0);
 111    cpu = spapr_find_cpu(id);
 112    if (cpu != NULL) {
 113        if (CPU(cpu)->halted) {
 114            rtas_st(rets, 1, 0);
 115        } else {
 116            rtas_st(rets, 1, 2);
 117        }
 118
 119        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 120        return;
 121    }
 122
 123    /* Didn't find a matching cpu */
 124    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 125}
 126
 127static void rtas_start_cpu(PowerPCCPU *callcpu, SpaprMachineState *spapr,
 128                           uint32_t token, uint32_t nargs,
 129                           target_ulong args,
 130                           uint32_t nret, target_ulong rets)
 131{
 132    target_ulong id, start, r3;
 133    PowerPCCPU *newcpu;
 134    CPUPPCState *env;
 135    target_ulong lpcr;
 136    target_ulong caller_lpcr;
 137
 138    if (nargs != 3 || nret != 1) {
 139        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 140        return;
 141    }
 142
 143    id = rtas_ld(args, 0);
 144    start = rtas_ld(args, 1);
 145    r3 = rtas_ld(args, 2);
 146
 147    newcpu = spapr_find_cpu(id);
 148    if (!newcpu) {
 149        /* Didn't find a matching cpu */
 150        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 151        return;
 152    }
 153
 154    env = &newcpu->env;
 155
 156    if (!CPU(newcpu)->halted) {
 157        rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
 158        return;
 159    }
 160
 161    cpu_synchronize_state(CPU(newcpu));
 162
 163    env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
 164    hreg_compute_hflags(env);
 165
 166    caller_lpcr = callcpu->env.spr[SPR_LPCR];
 167    lpcr = env->spr[SPR_LPCR];
 168
 169    /* Set ILE the same way */
 170    lpcr = (lpcr & ~LPCR_ILE) | (caller_lpcr & LPCR_ILE);
 171
 172    /* Set AIL the same way */
 173    lpcr = (lpcr & ~LPCR_AIL) | (caller_lpcr & LPCR_AIL);
 174
 175    if (env->mmu_model == POWERPC_MMU_3_00) {
 176        /*
 177         * New cpus are expected to start in the same radix/hash mode
 178         * as the existing CPUs
 179         */
 180        if (ppc64_v3_radix(callcpu)) {
 181            lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR;
 182        } else {
 183            lpcr &= ~(LPCR_UPRT | LPCR_GTSE | LPCR_HR);
 184        }
 185        env->spr[SPR_PSSCR] &= ~PSSCR_EC;
 186    }
 187    ppc_store_lpcr(newcpu, lpcr);
 188
 189    /*
 190     * Set the timebase offset of the new CPU to that of the invoking
 191     * CPU.  This helps hotplugged CPU to have the correct timebase
 192     * offset.
 193     */
 194    newcpu->env.tb_env->tb_offset = callcpu->env.tb_env->tb_offset;
 195
 196    spapr_cpu_set_entry_state(newcpu, start, 0, r3, 0);
 197
 198    qemu_cpu_kick(CPU(newcpu));
 199
 200    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 201}
 202
 203static void rtas_stop_self(PowerPCCPU *cpu, SpaprMachineState *spapr,
 204                           uint32_t token, uint32_t nargs,
 205                           target_ulong args,
 206                           uint32_t nret, target_ulong rets)
 207{
 208    CPUState *cs = CPU(cpu);
 209    CPUPPCState *env = &cpu->env;
 210    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
 211
 212    /* Disable Power-saving mode Exit Cause exceptions for the CPU.
 213     * This could deliver an interrupt on a dying CPU and crash the
 214     * guest.
 215     * For the same reason, set PSSCR_EC.
 216     */
 217    env->spr[SPR_PSSCR] |= PSSCR_EC;
 218    cs->halted = 1;
 219    ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm);
 220    kvmppc_set_reg_ppc_online(cpu, 0);
 221    qemu_cpu_kick(cs);
 222}
 223
 224static void rtas_ibm_suspend_me(PowerPCCPU *cpu, SpaprMachineState *spapr,
 225                                uint32_t token, uint32_t nargs,
 226                                target_ulong args,
 227                                uint32_t nret, target_ulong rets)
 228{
 229    CPUState *cs;
 230
 231    if (nargs != 0 || nret != 1) {
 232        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 233        return;
 234    }
 235
 236    CPU_FOREACH(cs) {
 237        PowerPCCPU *c = POWERPC_CPU(cs);
 238        CPUPPCState *e = &c->env;
 239        if (c == cpu) {
 240            continue;
 241        }
 242
 243        /* See h_join */
 244        if (!cs->halted || (e->msr & (1ULL << MSR_EE))) {
 245            rtas_st(rets, 0, H_MULTI_THREADS_ACTIVE);
 246            return;
 247        }
 248    }
 249
 250    qemu_system_suspend_request();
 251    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 252}
 253
 254static inline int sysparm_st(target_ulong addr, target_ulong len,
 255                             const void *val, uint16_t vallen)
 256{
 257    hwaddr phys = ppc64_phys_to_real(addr);
 258
 259    if (len < 2) {
 260        return RTAS_OUT_SYSPARM_PARAM_ERROR;
 261    }
 262    stw_be_phys(&address_space_memory, phys, vallen);
 263    cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen));
 264    return RTAS_OUT_SUCCESS;
 265}
 266
 267static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
 268                                          SpaprMachineState *spapr,
 269                                          uint32_t token, uint32_t nargs,
 270                                          target_ulong args,
 271                                          uint32_t nret, target_ulong rets)
 272{
 273    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
 274    MachineState *ms = MACHINE(spapr);
 275    target_ulong parameter = rtas_ld(args, 0);
 276    target_ulong buffer = rtas_ld(args, 1);
 277    target_ulong length = rtas_ld(args, 2);
 278    target_ulong ret;
 279
 280    switch (parameter) {
 281    case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
 282        g_autofree char *param_val = g_strdup_printf("MaxEntCap=%d,"
 283                                                     "DesMem=%" PRIu64 ","
 284                                                     "DesProcs=%d,"
 285                                                     "MaxPlatProcs=%d",
 286                                                     ms->smp.max_cpus,
 287                                                     ms->ram_size / MiB,
 288                                                     ms->smp.cpus,
 289                                                     ms->smp.max_cpus);
 290        if (pcc->n_host_threads > 0) {
 291            /*
 292             * Add HostThrs property. This property is not present in PAPR but
 293             * is expected by some guests to communicate the number of physical
 294             * host threads per core on the system so that they can scale
 295             * information which varies based on the thread configuration.
 296             */
 297            g_autofree char *hostthr_val = g_strdup_printf(",HostThrs=%d",
 298                                                           pcc->n_host_threads);
 299            char *old = param_val;
 300
 301            param_val = g_strconcat(param_val, hostthr_val, NULL);
 302            g_free(old);
 303        }
 304        ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
 305        break;
 306    }
 307    case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
 308        uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
 309
 310        ret = sysparm_st(buffer, length, &param_val, sizeof(param_val));
 311        break;
 312    }
 313    case RTAS_SYSPARM_UUID:
 314        ret = sysparm_st(buffer, length, (unsigned char *)&qemu_uuid,
 315                         (qemu_uuid_set ? 16 : 0));
 316        break;
 317    default:
 318        ret = RTAS_OUT_NOT_SUPPORTED;
 319    }
 320
 321    rtas_st(rets, 0, ret);
 322}
 323
 324static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
 325                                          SpaprMachineState *spapr,
 326                                          uint32_t token, uint32_t nargs,
 327                                          target_ulong args,
 328                                          uint32_t nret, target_ulong rets)
 329{
 330    target_ulong parameter = rtas_ld(args, 0);
 331    target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
 332
 333    switch (parameter) {
 334    case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS:
 335    case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
 336    case RTAS_SYSPARM_UUID:
 337        ret = RTAS_OUT_NOT_AUTHORIZED;
 338        break;
 339    }
 340
 341    rtas_st(rets, 0, ret);
 342}
 343
 344static void rtas_ibm_os_term(PowerPCCPU *cpu,
 345                            SpaprMachineState *spapr,
 346                            uint32_t token, uint32_t nargs,
 347                            target_ulong args,
 348                            uint32_t nret, target_ulong rets)
 349{
 350    target_ulong msgaddr = rtas_ld(args, 0);
 351    char msg[512];
 352
 353    cpu_physical_memory_read(msgaddr, msg, sizeof(msg) - 1);
 354    msg[sizeof(msg) - 1] = 0;
 355
 356    error_report("OS terminated: %s", msg);
 357    qemu_system_guest_panicked(NULL);
 358
 359    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 360}
 361
 362static void rtas_set_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
 363                                 uint32_t token, uint32_t nargs,
 364                                 target_ulong args, uint32_t nret,
 365                                 target_ulong rets)
 366{
 367    int32_t power_domain;
 368
 369    if (nargs != 2 || nret != 2) {
 370        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 371        return;
 372    }
 373
 374    /* we currently only use a single, "live insert" powerdomain for
 375     * hotplugged/dlpar'd resources, so the power is always live/full (100)
 376     */
 377    power_domain = rtas_ld(args, 0);
 378    if (power_domain != -1) {
 379        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 380        return;
 381    }
 382
 383    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 384    rtas_st(rets, 1, 100);
 385}
 386
 387static void rtas_get_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
 388                                  uint32_t token, uint32_t nargs,
 389                                  target_ulong args, uint32_t nret,
 390                                  target_ulong rets)
 391{
 392    int32_t power_domain;
 393
 394    if (nargs != 1 || nret != 2) {
 395        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 396        return;
 397    }
 398
 399    /* we currently only use a single, "live insert" powerdomain for
 400     * hotplugged/dlpar'd resources, so the power is always live/full (100)
 401     */
 402    power_domain = rtas_ld(args, 0);
 403    if (power_domain != -1) {
 404        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 405        return;
 406    }
 407
 408    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 409    rtas_st(rets, 1, 100);
 410}
 411
 412static void rtas_ibm_nmi_register(PowerPCCPU *cpu,
 413                                  SpaprMachineState *spapr,
 414                                  uint32_t token, uint32_t nargs,
 415                                  target_ulong args,
 416                                  uint32_t nret, target_ulong rets)
 417{
 418    hwaddr rtas_addr;
 419    target_ulong sreset_addr, mce_addr;
 420
 421    if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
 422        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 423        return;
 424    }
 425
 426    rtas_addr = spapr_get_rtas_addr();
 427    if (!rtas_addr) {
 428        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 429        return;
 430    }
 431
 432    sreset_addr = rtas_ld(args, 0);
 433    mce_addr = rtas_ld(args, 1);
 434
 435    /* PAPR requires these are in the first 32M of memory and within RMA */
 436    if (sreset_addr >= 32 * MiB || sreset_addr >= spapr->rma_size ||
 437           mce_addr >= 32 * MiB ||    mce_addr >= spapr->rma_size) {
 438        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 439        return;
 440    }
 441
 442    if (kvm_enabled()) {
 443        if (kvmppc_set_fwnmi(cpu) < 0) {
 444            rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 445            return;
 446        }
 447    }
 448
 449    spapr->fwnmi_system_reset_addr = sreset_addr;
 450    spapr->fwnmi_machine_check_addr = mce_addr;
 451
 452    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 453}
 454
 455static void rtas_ibm_nmi_interlock(PowerPCCPU *cpu,
 456                                   SpaprMachineState *spapr,
 457                                   uint32_t token, uint32_t nargs,
 458                                   target_ulong args,
 459                                   uint32_t nret, target_ulong rets)
 460{
 461    if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
 462        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 463        return;
 464    }
 465
 466    if (spapr->fwnmi_machine_check_addr == -1) {
 467        qemu_log_mask(LOG_GUEST_ERROR,
 468"FWNMI: ibm,nmi-interlock RTAS called with FWNMI not registered.\n");
 469
 470        /* NMI register not called */
 471        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 472        return;
 473    }
 474
 475    if (spapr->fwnmi_machine_check_interlock != cpu->vcpu_id) {
 476        /*
 477         * The vCPU that hit the NMI should invoke "ibm,nmi-interlock"
 478         * This should be PARAM_ERROR, but Linux calls "ibm,nmi-interlock"
 479         * for system reset interrupts, despite them not being interlocked.
 480         * PowerVM silently ignores this and returns success here. Returning
 481         * failure causes Linux to print the error "FWNMI: nmi-interlock
 482         * failed: -3", although no other apparent ill effects, this is a
 483         * regression for the user when enabling FWNMI. So for now, match
 484         * PowerVM. When most Linux clients are fixed, this could be
 485         * changed.
 486         */
 487        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 488        return;
 489    }
 490
 491    /*
 492     * vCPU issuing "ibm,nmi-interlock" is done with NMI handling,
 493     * hence unset fwnmi_machine_check_interlock.
 494     */
 495    spapr->fwnmi_machine_check_interlock = -1;
 496    qemu_cond_signal(&spapr->fwnmi_machine_check_interlock_cond);
 497    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 498    migrate_del_blocker(spapr->fwnmi_migration_blocker);
 499}
 500
 501static struct rtas_call {
 502    const char *name;
 503    spapr_rtas_fn fn;
 504} rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
 505
 506target_ulong spapr_rtas_call(PowerPCCPU *cpu, SpaprMachineState *spapr,
 507                             uint32_t token, uint32_t nargs, target_ulong args,
 508                             uint32_t nret, target_ulong rets)
 509{
 510    if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
 511        struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);
 512
 513        if (call->fn) {
 514            call->fn(cpu, spapr, token, nargs, args, nret, rets);
 515            return H_SUCCESS;
 516        }
 517    }
 518
 519    /* HACK: Some Linux early debug code uses RTAS display-character,
 520     * but assumes the token value is 0xa (which it is on some real
 521     * machines) without looking it up in the device tree.  This
 522     * special case makes this work */
 523    if (token == 0xa) {
 524        rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
 525        return H_SUCCESS;
 526    }
 527
 528    hcall_dprintf("Unknown RTAS token 0x%x\n", token);
 529    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 530    return H_PARAMETER;
 531}
 532
 533uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
 534                         uint32_t nret, uint64_t rets)
 535{
 536    int token;
 537
 538    for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) {
 539        if (strcmp(cmd, rtas_table[token].name) == 0) {
 540            SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 541            PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
 542
 543            rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE,
 544                                 nargs, args, nret, rets);
 545            return H_SUCCESS;
 546        }
 547    }
 548    return H_PARAMETER;
 549}
 550
 551void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
 552{
 553    assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));
 554
 555    token -= RTAS_TOKEN_BASE;
 556
 557    assert(!name || !rtas_table[token].name);
 558
 559    rtas_table[token].name = name;
 560    rtas_table[token].fn = fn;
 561}
 562
 563void spapr_dt_rtas_tokens(void *fdt, int rtas)
 564{
 565    int i;
 566
 567    for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
 568        struct rtas_call *call = &rtas_table[i];
 569
 570        if (!call->name) {
 571            continue;
 572        }
 573
 574        _FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE));
 575    }
 576}
 577
 578hwaddr spapr_get_rtas_addr(void)
 579{
 580    SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 581    int rtas_node;
 582    const fdt32_t *rtas_data;
 583    void *fdt = spapr->fdt_blob;
 584
 585    /* fetch rtas addr from fdt */
 586    rtas_node = fdt_path_offset(fdt, "/rtas");
 587    if (rtas_node < 0) {
 588        return 0;
 589    }
 590
 591    rtas_data = fdt_getprop(fdt, rtas_node, "linux,rtas-base", NULL);
 592    if (!rtas_data) {
 593        return 0;
 594    }
 595
 596    /*
 597     * We assume that the OS called RTAS instantiate-rtas, but some other
 598     * OS might call RTAS instantiate-rtas-64 instead. This fine as of now
 599     * as SLOF only supports 32-bit variant.
 600     */
 601    return (hwaddr)fdt32_to_cpu(*rtas_data);
 602}
 603
 604static void core_rtas_register_types(void)
 605{
 606    spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
 607                        rtas_display_character);
 608    spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
 609    spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
 610                        rtas_system_reboot);
 611    spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
 612                        rtas_query_cpu_stopped_state);
 613    spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
 614    spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
 615    spapr_rtas_register(RTAS_IBM_SUSPEND_ME, "ibm,suspend-me",
 616                        rtas_ibm_suspend_me);
 617    spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
 618                        "ibm,get-system-parameter",
 619                        rtas_ibm_get_system_parameter);
 620    spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
 621                        "ibm,set-system-parameter",
 622                        rtas_ibm_set_system_parameter);
 623    spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
 624                        rtas_ibm_os_term);
 625    spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
 626                        rtas_set_power_level);
 627    spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
 628                        rtas_get_power_level);
 629    spapr_rtas_register(RTAS_IBM_NMI_REGISTER, "ibm,nmi-register",
 630                        rtas_ibm_nmi_register);
 631    spapr_rtas_register(RTAS_IBM_NMI_INTERLOCK, "ibm,nmi-interlock",
 632                        rtas_ibm_nmi_interlock);
 633}
 634
 635type_init(core_rtas_register_types)
 636