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#include "qemu/osdep.h"
  28#include "cpu.h"
  29#include "qemu/log.h"
  30#include "qemu/error-report.h"
  31#include "sysemu/sysemu.h"
  32#include "sysemu/char.h"
  33#include "hw/qdev.h"
  34#include "sysemu/device_tree.h"
  35#include "sysemu/cpus.h"
  36#include "sysemu/kvm.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/ppc.h"
  42#include "qapi-event.h"
  43#include "hw/boards.h"
  44
  45#include <libfdt.h>
  46#include "hw/ppc/spapr_drc.h"
  47#include "qemu/cutils.h"
  48#include "trace.h"
  49#include "hw/ppc/fdt.h"
  50
  51static sPAPRConfigureConnectorState *spapr_ccs_find(sPAPRMachineState *spapr,
  52                                                    uint32_t drc_index)
  53{
  54    sPAPRConfigureConnectorState *ccs = NULL;
  55
  56    QTAILQ_FOREACH(ccs, &spapr->ccs_list, next) {
  57        if (ccs->drc_index == drc_index) {
  58            break;
  59        }
  60    }
  61
  62    return ccs;
  63}
  64
  65static void spapr_ccs_add(sPAPRMachineState *spapr,
  66                          sPAPRConfigureConnectorState *ccs)
  67{
  68    g_assert(!spapr_ccs_find(spapr, ccs->drc_index));
  69    QTAILQ_INSERT_HEAD(&spapr->ccs_list, ccs, next);
  70}
  71
  72static void spapr_ccs_remove(sPAPRMachineState *spapr,
  73                             sPAPRConfigureConnectorState *ccs)
  74{
  75    QTAILQ_REMOVE(&spapr->ccs_list, ccs, next);
  76    g_free(ccs);
  77}
  78
  79void spapr_ccs_reset_hook(void *opaque)
  80{
  81    sPAPRMachineState *spapr = opaque;
  82    sPAPRConfigureConnectorState *ccs, *ccs_tmp;
  83
  84    QTAILQ_FOREACH_SAFE(ccs, &spapr->ccs_list, next, ccs_tmp) {
  85        spapr_ccs_remove(spapr, ccs);
  86    }
  87}
  88
  89static void rtas_display_character(PowerPCCPU *cpu, sPAPRMachineState *spapr,
  90                                   uint32_t token, uint32_t nargs,
  91                                   target_ulong args,
  92                                   uint32_t nret, target_ulong rets)
  93{
  94    uint8_t c = rtas_ld(args, 0);
  95    VIOsPAPRDevice *sdev = vty_lookup(spapr, 0);
  96
  97    if (!sdev) {
  98        rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
  99    } else {
 100        vty_putchars(sdev, &c, sizeof(c));
 101        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 102    }
 103}
 104
 105static void rtas_power_off(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 106                           uint32_t token, uint32_t nargs, target_ulong args,
 107                           uint32_t nret, target_ulong rets)
 108{
 109    if (nargs != 2 || nret != 1) {
 110        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 111        return;
 112    }
 113    qemu_system_shutdown_request();
 114    cpu_stop_current();
 115    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 116}
 117
 118static void rtas_system_reboot(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 119                               uint32_t token, uint32_t nargs,
 120                               target_ulong args,
 121                               uint32_t nret, target_ulong rets)
 122{
 123    if (nargs != 0 || nret != 1) {
 124        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 125        return;
 126    }
 127    qemu_system_reset_request();
 128    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 129}
 130
 131static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
 132                                         sPAPRMachineState *spapr,
 133                                         uint32_t token, uint32_t nargs,
 134                                         target_ulong args,
 135                                         uint32_t nret, target_ulong rets)
 136{
 137    target_ulong id;
 138    PowerPCCPU *cpu;
 139
 140    if (nargs != 1 || nret != 2) {
 141        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 142        return;
 143    }
 144
 145    id = rtas_ld(args, 0);
 146    cpu = ppc_get_vcpu_by_dt_id(id);
 147    if (cpu != NULL) {
 148        if (CPU(cpu)->halted) {
 149            rtas_st(rets, 1, 0);
 150        } else {
 151            rtas_st(rets, 1, 2);
 152        }
 153
 154        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 155        return;
 156    }
 157
 158    /* Didn't find a matching cpu */
 159    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 160}
 161
 162/*
 163 * Set the timebase offset of the CPU to that of first CPU.
 164 * This helps hotplugged CPU to have the correct timebase offset.
 165 */
 166static void spapr_cpu_update_tb_offset(PowerPCCPU *cpu)
 167{
 168    PowerPCCPU *fcpu = POWERPC_CPU(first_cpu);
 169
 170    cpu->env.tb_env->tb_offset = fcpu->env.tb_env->tb_offset;
 171}
 172
 173static void spapr_cpu_set_endianness(PowerPCCPU *cpu)
 174{
 175    PowerPCCPU *fcpu = POWERPC_CPU(first_cpu);
 176    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(fcpu);
 177
 178    if (!pcc->interrupts_big_endian(fcpu)) {
 179        cpu->env.spr[SPR_LPCR] |= LPCR_ILE;
 180    }
 181}
 182
 183static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPRMachineState *spapr,
 184                           uint32_t token, uint32_t nargs,
 185                           target_ulong args,
 186                           uint32_t nret, target_ulong rets)
 187{
 188    target_ulong id, start, r3;
 189    PowerPCCPU *cpu;
 190
 191    if (nargs != 3 || nret != 1) {
 192        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 193        return;
 194    }
 195
 196    id = rtas_ld(args, 0);
 197    start = rtas_ld(args, 1);
 198    r3 = rtas_ld(args, 2);
 199
 200    cpu = ppc_get_vcpu_by_dt_id(id);
 201    if (cpu != NULL) {
 202        CPUState *cs = CPU(cpu);
 203        CPUPPCState *env = &cpu->env;
 204
 205        if (!cs->halted) {
 206            rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
 207            return;
 208        }
 209
 210        /* This will make sure qemu state is up to date with kvm, and
 211         * mark it dirty so our changes get flushed back before the
 212         * new cpu enters */
 213        kvm_cpu_synchronize_state(cs);
 214
 215        env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
 216        env->nip = start;
 217        env->gpr[3] = r3;
 218        cs->halted = 0;
 219        spapr_cpu_set_endianness(cpu);
 220        spapr_cpu_update_tb_offset(cpu);
 221
 222        qemu_cpu_kick(cs);
 223
 224        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 225        return;
 226    }
 227
 228    /* Didn't find a matching cpu */
 229    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 230}
 231
 232static void rtas_stop_self(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 233                           uint32_t token, uint32_t nargs,
 234                           target_ulong args,
 235                           uint32_t nret, target_ulong rets)
 236{
 237    CPUState *cs = CPU(cpu);
 238    CPUPPCState *env = &cpu->env;
 239
 240    cs->halted = 1;
 241    qemu_cpu_kick(cs);
 242    /*
 243     * While stopping a CPU, the guest calls H_CPPR which
 244     * effectively disables interrupts on XICS level.
 245     * However decrementer interrupts in TCG can still
 246     * wake the CPU up so here we disable interrupts in MSR
 247     * as well.
 248     * As rtas_start_cpu() resets the whole MSR anyway, there is
 249     * no need to bother with specific bits, we just clear it.
 250     */
 251    env->msr = 0;
 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    target_ulong parameter = rtas_ld(args, 0);
 274    target_ulong buffer = rtas_ld(args, 1);
 275    target_ulong length = rtas_ld(args, 2);
 276    target_ulong ret;
 277
 278    switch (parameter) {
 279    case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
 280        char *param_val = g_strdup_printf("MaxEntCap=%d,"
 281                                          "DesMem=%llu,"
 282                                          "DesProcs=%d,"
 283                                          "MaxPlatProcs=%d",
 284                                          max_cpus,
 285                                          current_machine->ram_size / M_BYTE,
 286                                          smp_cpus,
 287                                          max_cpus);
 288        ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
 289        g_free(param_val);
 290        break;
 291    }
 292    case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
 293        uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
 294
 295        ret = sysparm_st(buffer, length, &param_val, sizeof(param_val));
 296        break;
 297    }
 298    case RTAS_SYSPARM_UUID:
 299        ret = sysparm_st(buffer, length, (unsigned char *)&qemu_uuid,
 300                         (qemu_uuid_set ? 16 : 0));
 301        break;
 302    default:
 303        ret = RTAS_OUT_NOT_SUPPORTED;
 304    }
 305
 306    rtas_st(rets, 0, ret);
 307}
 308
 309static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
 310                                          sPAPRMachineState *spapr,
 311                                          uint32_t token, uint32_t nargs,
 312                                          target_ulong args,
 313                                          uint32_t nret, target_ulong rets)
 314{
 315    target_ulong parameter = rtas_ld(args, 0);
 316    target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
 317
 318    switch (parameter) {
 319    case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS:
 320    case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
 321    case RTAS_SYSPARM_UUID:
 322        ret = RTAS_OUT_NOT_AUTHORIZED;
 323        break;
 324    }
 325
 326    rtas_st(rets, 0, ret);
 327}
 328
 329static void rtas_ibm_os_term(PowerPCCPU *cpu,
 330                            sPAPRMachineState *spapr,
 331                            uint32_t token, uint32_t nargs,
 332                            target_ulong args,
 333                            uint32_t nret, target_ulong rets)
 334{
 335    target_ulong ret = 0;
 336
 337    qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, false, NULL,
 338                                   &error_abort);
 339
 340    rtas_st(rets, 0, ret);
 341}
 342
 343static void rtas_set_power_level(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 344                                 uint32_t token, uint32_t nargs,
 345                                 target_ulong args, uint32_t nret,
 346                                 target_ulong rets)
 347{
 348    int32_t power_domain;
 349
 350    if (nargs != 2 || nret != 2) {
 351        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 352        return;
 353    }
 354
 355    /* we currently only use a single, "live insert" powerdomain for
 356     * hotplugged/dlpar'd resources, so the power is always live/full (100)
 357     */
 358    power_domain = rtas_ld(args, 0);
 359    if (power_domain != -1) {
 360        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 361        return;
 362    }
 363
 364    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 365    rtas_st(rets, 1, 100);
 366}
 367
 368static void rtas_get_power_level(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 369                                  uint32_t token, uint32_t nargs,
 370                                  target_ulong args, uint32_t nret,
 371                                  target_ulong rets)
 372{
 373    int32_t power_domain;
 374
 375    if (nargs != 1 || nret != 2) {
 376        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 377        return;
 378    }
 379
 380    /* we currently only use a single, "live insert" powerdomain for
 381     * hotplugged/dlpar'd resources, so the power is always live/full (100)
 382     */
 383    power_domain = rtas_ld(args, 0);
 384    if (power_domain != -1) {
 385        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 386        return;
 387    }
 388
 389    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 390    rtas_st(rets, 1, 100);
 391}
 392
 393static bool sensor_type_is_dr(uint32_t sensor_type)
 394{
 395    switch (sensor_type) {
 396    case RTAS_SENSOR_TYPE_ISOLATION_STATE:
 397    case RTAS_SENSOR_TYPE_DR:
 398    case RTAS_SENSOR_TYPE_ALLOCATION_STATE:
 399        return true;
 400    }
 401
 402    return false;
 403}
 404
 405static void rtas_set_indicator(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 406                               uint32_t token, uint32_t nargs,
 407                               target_ulong args, uint32_t nret,
 408                               target_ulong rets)
 409{
 410    uint32_t sensor_type;
 411    uint32_t sensor_index;
 412    uint32_t sensor_state;
 413    uint32_t ret = RTAS_OUT_SUCCESS;
 414    sPAPRDRConnector *drc;
 415    sPAPRDRConnectorClass *drck;
 416
 417    if (nargs != 3 || nret != 1) {
 418        ret = RTAS_OUT_PARAM_ERROR;
 419        goto out;
 420    }
 421
 422    sensor_type = rtas_ld(args, 0);
 423    sensor_index = rtas_ld(args, 1);
 424    sensor_state = rtas_ld(args, 2);
 425
 426    if (!sensor_type_is_dr(sensor_type)) {
 427        goto out_unimplemented;
 428    }
 429
 430    /* if this is a DR sensor we can assume sensor_index == drc_index */
 431    drc = spapr_dr_connector_by_index(sensor_index);
 432    if (!drc) {
 433        trace_spapr_rtas_set_indicator_invalid(sensor_index);
 434        ret = RTAS_OUT_PARAM_ERROR;
 435        goto out;
 436    }
 437    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 438
 439    switch (sensor_type) {
 440    case RTAS_SENSOR_TYPE_ISOLATION_STATE:
 441        /* if the guest is configuring a device attached to this
 442         * DRC, we should reset the configuration state at this
 443         * point since it may no longer be reliable (guest released
 444         * device and needs to start over, or unplug occurred so
 445         * the FDT is no longer valid)
 446         */
 447        if (sensor_state == SPAPR_DR_ISOLATION_STATE_ISOLATED) {
 448            sPAPRConfigureConnectorState *ccs = spapr_ccs_find(spapr,
 449                                                               sensor_index);
 450            if (ccs) {
 451                spapr_ccs_remove(spapr, ccs);
 452            }
 453        }
 454        ret = drck->set_isolation_state(drc, sensor_state);
 455        break;
 456    case RTAS_SENSOR_TYPE_DR:
 457        ret = drck->set_indicator_state(drc, sensor_state);
 458        break;
 459    case RTAS_SENSOR_TYPE_ALLOCATION_STATE:
 460        ret = drck->set_allocation_state(drc, sensor_state);
 461        break;
 462    default:
 463        goto out_unimplemented;
 464    }
 465
 466out:
 467    rtas_st(rets, 0, ret);
 468    return;
 469
 470out_unimplemented:
 471    /* currently only DR-related sensors are implemented */
 472    trace_spapr_rtas_set_indicator_not_supported(sensor_index, sensor_type);
 473    rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 474}
 475
 476static void rtas_get_sensor_state(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 477                                  uint32_t token, uint32_t nargs,
 478                                  target_ulong args, uint32_t nret,
 479                                  target_ulong rets)
 480{
 481    uint32_t sensor_type;
 482    uint32_t sensor_index;
 483    uint32_t sensor_state = 0;
 484    sPAPRDRConnector *drc;
 485    sPAPRDRConnectorClass *drck;
 486    uint32_t ret = RTAS_OUT_SUCCESS;
 487
 488    if (nargs != 2 || nret != 2) {
 489        ret = RTAS_OUT_PARAM_ERROR;
 490        goto out;
 491    }
 492
 493    sensor_type = rtas_ld(args, 0);
 494    sensor_index = rtas_ld(args, 1);
 495
 496    if (sensor_type != RTAS_SENSOR_TYPE_ENTITY_SENSE) {
 497        /* currently only DR-related sensors are implemented */
 498        trace_spapr_rtas_get_sensor_state_not_supported(sensor_index,
 499                                                        sensor_type);
 500        ret = RTAS_OUT_NOT_SUPPORTED;
 501        goto out;
 502    }
 503
 504    drc = spapr_dr_connector_by_index(sensor_index);
 505    if (!drc) {
 506        trace_spapr_rtas_get_sensor_state_invalid(sensor_index);
 507        ret = RTAS_OUT_PARAM_ERROR;
 508        goto out;
 509    }
 510    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 511    ret = drck->entity_sense(drc, &sensor_state);
 512
 513out:
 514    rtas_st(rets, 0, ret);
 515    rtas_st(rets, 1, sensor_state);
 516}
 517
 518/* configure-connector work area offsets, int32_t units for field
 519 * indexes, bytes for field offset/len values.
 520 *
 521 * as documented by PAPR+ v2.7, 13.5.3.5
 522 */
 523#define CC_IDX_NODE_NAME_OFFSET 2
 524#define CC_IDX_PROP_NAME_OFFSET 2
 525#define CC_IDX_PROP_LEN 3
 526#define CC_IDX_PROP_DATA_OFFSET 4
 527#define CC_VAL_DATA_OFFSET ((CC_IDX_PROP_DATA_OFFSET + 1) * 4)
 528#define CC_WA_LEN 4096
 529
 530static void configure_connector_st(target_ulong addr, target_ulong offset,
 531                                   const void *buf, size_t len)
 532{
 533    cpu_physical_memory_write(ppc64_phys_to_real(addr + offset),
 534                              buf, MIN(len, CC_WA_LEN - offset));
 535}
 536
 537static void rtas_ibm_configure_connector(PowerPCCPU *cpu,
 538                                         sPAPRMachineState *spapr,
 539                                         uint32_t token, uint32_t nargs,
 540                                         target_ulong args, uint32_t nret,
 541                                         target_ulong rets)
 542{
 543    uint64_t wa_addr;
 544    uint64_t wa_offset;
 545    uint32_t drc_index;
 546    sPAPRDRConnector *drc;
 547    sPAPRDRConnectorClass *drck;
 548    sPAPRConfigureConnectorState *ccs;
 549    sPAPRDRCCResponse resp = SPAPR_DR_CC_RESPONSE_CONTINUE;
 550    int rc;
 551    const void *fdt;
 552
 553    if (nargs != 2 || nret != 1) {
 554        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 555        return;
 556    }
 557
 558    wa_addr = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 0);
 559
 560    drc_index = rtas_ld(wa_addr, 0);
 561    drc = spapr_dr_connector_by_index(drc_index);
 562    if (!drc) {
 563        trace_spapr_rtas_ibm_configure_connector_invalid(drc_index);
 564        rc = RTAS_OUT_PARAM_ERROR;
 565        goto out;
 566    }
 567
 568    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 569    fdt = drck->get_fdt(drc, NULL);
 570    if (!fdt) {
 571        trace_spapr_rtas_ibm_configure_connector_missing_fdt(drc_index);
 572        rc = SPAPR_DR_CC_RESPONSE_NOT_CONFIGURABLE;
 573        goto out;
 574    }
 575
 576    ccs = spapr_ccs_find(spapr, drc_index);
 577    if (!ccs) {
 578        ccs = g_new0(sPAPRConfigureConnectorState, 1);
 579        (void)drck->get_fdt(drc, &ccs->fdt_offset);
 580        ccs->drc_index = drc_index;
 581        spapr_ccs_add(spapr, ccs);
 582    }
 583
 584    do {
 585        uint32_t tag;
 586        const char *name;
 587        const struct fdt_property *prop;
 588        int fdt_offset_next, prop_len;
 589
 590        tag = fdt_next_tag(fdt, ccs->fdt_offset, &fdt_offset_next);
 591
 592        switch (tag) {
 593        case FDT_BEGIN_NODE:
 594            ccs->fdt_depth++;
 595            name = fdt_get_name(fdt, ccs->fdt_offset, NULL);
 596
 597            /* provide the name of the next OF node */
 598            wa_offset = CC_VAL_DATA_OFFSET;
 599            rtas_st(wa_addr, CC_IDX_NODE_NAME_OFFSET, wa_offset);
 600            configure_connector_st(wa_addr, wa_offset, name, strlen(name) + 1);
 601            resp = SPAPR_DR_CC_RESPONSE_NEXT_CHILD;
 602            break;
 603        case FDT_END_NODE:
 604            ccs->fdt_depth--;
 605            if (ccs->fdt_depth == 0) {
 606                /* done sending the device tree, don't need to track
 607                 * the state anymore
 608                 */
 609                drck->set_configured(drc);
 610                spapr_ccs_remove(spapr, ccs);
 611                ccs = NULL;
 612                resp = SPAPR_DR_CC_RESPONSE_SUCCESS;
 613            } else {
 614                resp = SPAPR_DR_CC_RESPONSE_PREV_PARENT;
 615            }
 616            break;
 617        case FDT_PROP:
 618            prop = fdt_get_property_by_offset(fdt, ccs->fdt_offset,
 619                                              &prop_len);
 620            name = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
 621
 622            /* provide the name of the next OF property */
 623            wa_offset = CC_VAL_DATA_OFFSET;
 624            rtas_st(wa_addr, CC_IDX_PROP_NAME_OFFSET, wa_offset);
 625            configure_connector_st(wa_addr, wa_offset, name, strlen(name) + 1);
 626
 627            /* provide the length and value of the OF property. data gets
 628             * placed immediately after NULL terminator of the OF property's
 629             * name string
 630             */
 631            wa_offset += strlen(name) + 1,
 632            rtas_st(wa_addr, CC_IDX_PROP_LEN, prop_len);
 633            rtas_st(wa_addr, CC_IDX_PROP_DATA_OFFSET, wa_offset);
 634            configure_connector_st(wa_addr, wa_offset, prop->data, prop_len);
 635            resp = SPAPR_DR_CC_RESPONSE_NEXT_PROPERTY;
 636            break;
 637        case FDT_END:
 638            resp = SPAPR_DR_CC_RESPONSE_ERROR;
 639        default:
 640            /* keep seeking for an actionable tag */
 641            break;
 642        }
 643        if (ccs) {
 644            ccs->fdt_offset = fdt_offset_next;
 645        }
 646    } while (resp == SPAPR_DR_CC_RESPONSE_CONTINUE);
 647
 648    rc = resp;
 649out:
 650    rtas_st(rets, 0, rc);
 651}
 652
 653static struct rtas_call {
 654    const char *name;
 655    spapr_rtas_fn fn;
 656} rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
 657
 658target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 659                             uint32_t token, uint32_t nargs, target_ulong args,
 660                             uint32_t nret, target_ulong rets)
 661{
 662    if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
 663        struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);
 664
 665        if (call->fn) {
 666            call->fn(cpu, spapr, token, nargs, args, nret, rets);
 667            return H_SUCCESS;
 668        }
 669    }
 670
 671    /* HACK: Some Linux early debug code uses RTAS display-character,
 672     * but assumes the token value is 0xa (which it is on some real
 673     * machines) without looking it up in the device tree.  This
 674     * special case makes this work */
 675    if (token == 0xa) {
 676        rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
 677        return H_SUCCESS;
 678    }
 679
 680    hcall_dprintf("Unknown RTAS token 0x%x\n", token);
 681    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 682    return H_PARAMETER;
 683}
 684
 685uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
 686                         uint32_t nret, uint64_t rets)
 687{
 688    int token;
 689
 690    for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) {
 691        if (strcmp(cmd, rtas_table[token].name) == 0) {
 692            sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 693            PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
 694
 695            rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE,
 696                                 nargs, args, nret, rets);
 697            return H_SUCCESS;
 698        }
 699    }
 700    return H_PARAMETER;
 701}
 702
 703void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
 704{
 705    assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));
 706
 707    token -= RTAS_TOKEN_BASE;
 708
 709    assert(!rtas_table[token].name);
 710
 711    rtas_table[token].name = name;
 712    rtas_table[token].fn = fn;
 713}
 714
 715void spapr_dt_rtas_tokens(void *fdt, int rtas)
 716{
 717    int i;
 718
 719    for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
 720        struct rtas_call *call = &rtas_table[i];
 721
 722        if (!call->name) {
 723            continue;
 724        }
 725
 726        _FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE));
 727    }
 728}
 729
 730void spapr_load_rtas(sPAPRMachineState *spapr, void *fdt, hwaddr addr)
 731{
 732    int rtas_node;
 733    int ret;
 734
 735    /* Copy RTAS blob into guest RAM */
 736    cpu_physical_memory_write(addr, spapr->rtas_blob, spapr->rtas_size);
 737
 738    ret = fdt_add_mem_rsv(fdt, addr, spapr->rtas_size);
 739    if (ret < 0) {
 740        error_report("Couldn't add RTAS reserve entry: %s",
 741                     fdt_strerror(ret));
 742        exit(1);
 743    }
 744
 745    /* Update the device tree with the blob's location */
 746    rtas_node = fdt_path_offset(fdt, "/rtas");
 747    assert(rtas_node >= 0);
 748
 749    ret = fdt_setprop_cell(fdt, rtas_node, "linux,rtas-base", addr);
 750    if (ret < 0) {
 751        error_report("Couldn't add linux,rtas-base property: %s",
 752                     fdt_strerror(ret));
 753        exit(1);
 754    }
 755
 756    ret = fdt_setprop_cell(fdt, rtas_node, "linux,rtas-entry", addr);
 757    if (ret < 0) {
 758        error_report("Couldn't add linux,rtas-entry property: %s",
 759                     fdt_strerror(ret));
 760        exit(1);
 761    }
 762
 763    ret = fdt_setprop_cell(fdt, rtas_node, "rtas-size", spapr->rtas_size);
 764    if (ret < 0) {
 765        error_report("Couldn't add rtas-size property: %s",
 766                     fdt_strerror(ret));
 767        exit(1);
 768    }
 769}
 770
 771static void core_rtas_register_types(void)
 772{
 773    spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
 774                        rtas_display_character);
 775    spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
 776    spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
 777                        rtas_system_reboot);
 778    spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
 779                        rtas_query_cpu_stopped_state);
 780    spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
 781    spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
 782    spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
 783                        "ibm,get-system-parameter",
 784                        rtas_ibm_get_system_parameter);
 785    spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
 786                        "ibm,set-system-parameter",
 787                        rtas_ibm_set_system_parameter);
 788    spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
 789                        rtas_ibm_os_term);
 790    spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
 791                        rtas_set_power_level);
 792    spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
 793                        rtas_get_power_level);
 794    spapr_rtas_register(RTAS_SET_INDICATOR, "set-indicator",
 795                        rtas_set_indicator);
 796    spapr_rtas_register(RTAS_GET_SENSOR_STATE, "get-sensor-state",
 797                        rtas_get_sensor_state);
 798    spapr_rtas_register(RTAS_IBM_CONFIGURE_CONNECTOR, "ibm,configure-connector",
 799                        rtas_ibm_configure_connector);
 800}
 801
 802type_init(core_rtas_register_types)
 803