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 "cpu.h" 28 #include "sysemu/sysemu.h" 29 #include "sysemu/char.h" 30 #include "hw/qdev.h" 31 #include "sysemu/device_tree.h" 32 33 #include "hw/ppc/spapr.h" 34 #include "hw/ppc/spapr_vio.h" 35 #include "qapi-event.h" 36 37 #include <libfdt.h> 38 #include "hw/ppc/spapr_drc.h" 39 40 /* #define DEBUG_SPAPR */ 41 42 #ifdef DEBUG_SPAPR 43 #define DPRINTF(fmt, ...) \ 44 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) 45 #else 46 #define DPRINTF(fmt, ...) \ 47 do { } while (0) 48 #endif 49 50 51 static void rtas_display_character(PowerPCCPU *cpu, sPAPREnvironment *spapr, 52 uint32_t token, uint32_t nargs, 53 target_ulong args, 54 uint32_t nret, target_ulong rets) 55 { 56 uint8_t c = rtas_ld(args, 0); 57 VIOsPAPRDevice *sdev = vty_lookup(spapr, 0); 58 59 if (!sdev) { 60 rtas_st(rets, 0, RTAS_OUT_HW_ERROR); 61 } else { 62 vty_putchars(sdev, &c, sizeof(c)); 63 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 64 } 65 } 66 67 static void rtas_power_off(PowerPCCPU *cpu, sPAPREnvironment *spapr, 68 uint32_t token, uint32_t nargs, target_ulong args, 69 uint32_t nret, target_ulong rets) 70 { 71 if (nargs != 2 || nret != 1) { 72 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 73 return; 74 } 75 qemu_system_shutdown_request(); 76 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 77 } 78 79 static void rtas_system_reboot(PowerPCCPU *cpu, sPAPREnvironment *spapr, 80 uint32_t token, uint32_t nargs, 81 target_ulong args, 82 uint32_t nret, target_ulong rets) 83 { 84 if (nargs != 0 || nret != 1) { 85 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 86 return; 87 } 88 qemu_system_reset_request(); 89 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 90 } 91 92 static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_, 93 sPAPREnvironment *spapr, 94 uint32_t token, uint32_t nargs, 95 target_ulong args, 96 uint32_t nret, target_ulong rets) 97 { 98 target_ulong id; 99 PowerPCCPU *cpu; 100 101 if (nargs != 1 || nret != 2) { 102 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 103 return; 104 } 105 106 id = rtas_ld(args, 0); 107 cpu = ppc_get_vcpu_by_dt_id(id); 108 if (cpu != NULL) { 109 if (CPU(cpu)->halted) { 110 rtas_st(rets, 1, 0); 111 } else { 112 rtas_st(rets, 1, 2); 113 } 114 115 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 116 return; 117 } 118 119 /* Didn't find a matching cpu */ 120 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 121 } 122 123 static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPREnvironment *spapr, 124 uint32_t token, uint32_t nargs, 125 target_ulong args, 126 uint32_t nret, target_ulong rets) 127 { 128 target_ulong id, start, r3; 129 PowerPCCPU *cpu; 130 131 if (nargs != 3 || nret != 1) { 132 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 133 return; 134 } 135 136 id = rtas_ld(args, 0); 137 start = rtas_ld(args, 1); 138 r3 = rtas_ld(args, 2); 139 140 cpu = ppc_get_vcpu_by_dt_id(id); 141 if (cpu != NULL) { 142 CPUState *cs = CPU(cpu); 143 CPUPPCState *env = &cpu->env; 144 145 if (!cs->halted) { 146 rtas_st(rets, 0, RTAS_OUT_HW_ERROR); 147 return; 148 } 149 150 /* This will make sure qemu state is up to date with kvm, and 151 * mark it dirty so our changes get flushed back before the 152 * new cpu enters */ 153 kvm_cpu_synchronize_state(cs); 154 155 env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME); 156 env->nip = start; 157 env->gpr[3] = r3; 158 cs->halted = 0; 159 160 qemu_cpu_kick(cs); 161 162 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 163 return; 164 } 165 166 /* Didn't find a matching cpu */ 167 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 168 } 169 170 static void rtas_stop_self(PowerPCCPU *cpu, sPAPREnvironment *spapr, 171 uint32_t token, uint32_t nargs, 172 target_ulong args, 173 uint32_t nret, target_ulong rets) 174 { 175 CPUState *cs = CPU(cpu); 176 CPUPPCState *env = &cpu->env; 177 178 cs->halted = 1; 179 cpu_exit(cs); 180 /* 181 * While stopping a CPU, the guest calls H_CPPR which 182 * effectively disables interrupts on XICS level. 183 * However decrementer interrupts in TCG can still 184 * wake the CPU up so here we disable interrupts in MSR 185 * as well. 186 * As rtas_start_cpu() resets the whole MSR anyway, there is 187 * no need to bother with specific bits, we just clear it. 188 */ 189 env->msr = 0; 190 } 191 192 static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu, 193 sPAPREnvironment *spapr, 194 uint32_t token, uint32_t nargs, 195 target_ulong args, 196 uint32_t nret, target_ulong rets) 197 { 198 target_ulong parameter = rtas_ld(args, 0); 199 target_ulong buffer = rtas_ld(args, 1); 200 target_ulong length = rtas_ld(args, 2); 201 target_ulong ret = RTAS_OUT_SUCCESS; 202 203 switch (parameter) { 204 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: { 205 char *param_val = g_strdup_printf("MaxEntCap=%d,MaxPlatProcs=%d", 206 max_cpus, smp_cpus); 207 rtas_st_buffer(buffer, length, (uint8_t *)param_val, strlen(param_val)); 208 g_free(param_val); 209 break; 210 } 211 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: { 212 uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED; 213 214 rtas_st_buffer(buffer, length, ¶m_val, sizeof(param_val)); 215 break; 216 } 217 case RTAS_SYSPARM_UUID: 218 rtas_st_buffer(buffer, length, qemu_uuid, (qemu_uuid_set ? 16 : 0)); 219 break; 220 default: 221 ret = RTAS_OUT_NOT_SUPPORTED; 222 } 223 224 rtas_st(rets, 0, ret); 225 } 226 227 static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu, 228 sPAPREnvironment *spapr, 229 uint32_t token, uint32_t nargs, 230 target_ulong args, 231 uint32_t nret, target_ulong rets) 232 { 233 target_ulong parameter = rtas_ld(args, 0); 234 target_ulong ret = RTAS_OUT_NOT_SUPPORTED; 235 236 switch (parameter) { 237 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: 238 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: 239 case RTAS_SYSPARM_UUID: 240 ret = RTAS_OUT_NOT_AUTHORIZED; 241 break; 242 } 243 244 rtas_st(rets, 0, ret); 245 } 246 247 static void rtas_ibm_os_term(PowerPCCPU *cpu, 248 sPAPREnvironment *spapr, 249 uint32_t token, uint32_t nargs, 250 target_ulong args, 251 uint32_t nret, target_ulong rets) 252 { 253 target_ulong ret = 0; 254 255 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, &error_abort); 256 257 rtas_st(rets, 0, ret); 258 } 259 260 static void rtas_set_power_level(PowerPCCPU *cpu, sPAPREnvironment *spapr, 261 uint32_t token, uint32_t nargs, 262 target_ulong args, uint32_t nret, 263 target_ulong rets) 264 { 265 int32_t power_domain; 266 267 if (nargs != 2 || nret != 2) { 268 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 269 return; 270 } 271 272 /* we currently only use a single, "live insert" powerdomain for 273 * hotplugged/dlpar'd resources, so the power is always live/full (100) 274 */ 275 power_domain = rtas_ld(args, 0); 276 if (power_domain != -1) { 277 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); 278 return; 279 } 280 281 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 282 rtas_st(rets, 1, 100); 283 } 284 285 static void rtas_get_power_level(PowerPCCPU *cpu, sPAPREnvironment *spapr, 286 uint32_t token, uint32_t nargs, 287 target_ulong args, uint32_t nret, 288 target_ulong rets) 289 { 290 int32_t power_domain; 291 292 if (nargs != 1 || nret != 2) { 293 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 294 return; 295 } 296 297 /* we currently only use a single, "live insert" powerdomain for 298 * hotplugged/dlpar'd resources, so the power is always live/full (100) 299 */ 300 power_domain = rtas_ld(args, 0); 301 if (power_domain != -1) { 302 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); 303 return; 304 } 305 306 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 307 rtas_st(rets, 1, 100); 308 } 309 310 static bool sensor_type_is_dr(uint32_t sensor_type) 311 { 312 switch (sensor_type) { 313 case RTAS_SENSOR_TYPE_ISOLATION_STATE: 314 case RTAS_SENSOR_TYPE_DR: 315 case RTAS_SENSOR_TYPE_ALLOCATION_STATE: 316 return true; 317 } 318 319 return false; 320 } 321 322 static void rtas_set_indicator(PowerPCCPU *cpu, sPAPREnvironment *spapr, 323 uint32_t token, uint32_t nargs, 324 target_ulong args, uint32_t nret, 325 target_ulong rets) 326 { 327 uint32_t sensor_type; 328 uint32_t sensor_index; 329 uint32_t sensor_state; 330 sPAPRDRConnector *drc; 331 sPAPRDRConnectorClass *drck; 332 333 if (nargs != 3 || nret != 1) { 334 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 335 return; 336 } 337 338 sensor_type = rtas_ld(args, 0); 339 sensor_index = rtas_ld(args, 1); 340 sensor_state = rtas_ld(args, 2); 341 342 if (!sensor_type_is_dr(sensor_type)) { 343 goto out_unimplemented; 344 } 345 346 /* if this is a DR sensor we can assume sensor_index == drc_index */ 347 drc = spapr_dr_connector_by_index(sensor_index); 348 if (!drc) { 349 DPRINTF("rtas_set_indicator: invalid sensor/DRC index: %xh\n", 350 sensor_index); 351 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 352 return; 353 } 354 drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); 355 356 switch (sensor_type) { 357 case RTAS_SENSOR_TYPE_ISOLATION_STATE: 358 drck->set_isolation_state(drc, sensor_state); 359 break; 360 case RTAS_SENSOR_TYPE_DR: 361 drck->set_indicator_state(drc, sensor_state); 362 break; 363 case RTAS_SENSOR_TYPE_ALLOCATION_STATE: 364 drck->set_allocation_state(drc, sensor_state); 365 break; 366 default: 367 goto out_unimplemented; 368 } 369 370 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 371 return; 372 373 out_unimplemented: 374 /* currently only DR-related sensors are implemented */ 375 DPRINTF("rtas_set_indicator: sensor/indicator not implemented: %d\n", 376 sensor_type); 377 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); 378 } 379 380 static struct rtas_call { 381 const char *name; 382 spapr_rtas_fn fn; 383 } rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE]; 384 385 target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPREnvironment *spapr, 386 uint32_t token, uint32_t nargs, target_ulong args, 387 uint32_t nret, target_ulong rets) 388 { 389 if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) { 390 struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE); 391 392 if (call->fn) { 393 call->fn(cpu, spapr, token, nargs, args, nret, rets); 394 return H_SUCCESS; 395 } 396 } 397 398 /* HACK: Some Linux early debug code uses RTAS display-character, 399 * but assumes the token value is 0xa (which it is on some real 400 * machines) without looking it up in the device tree. This 401 * special case makes this work */ 402 if (token == 0xa) { 403 rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets); 404 return H_SUCCESS; 405 } 406 407 hcall_dprintf("Unknown RTAS token 0x%x\n", token); 408 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 409 return H_PARAMETER; 410 } 411 412 void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn) 413 { 414 if (!((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX))) { 415 fprintf(stderr, "RTAS invalid token 0x%x\n", token); 416 exit(1); 417 } 418 419 token -= RTAS_TOKEN_BASE; 420 if (rtas_table[token].name) { 421 fprintf(stderr, "RTAS call \"%s\" is registered already as 0x%x\n", 422 rtas_table[token].name, token); 423 exit(1); 424 } 425 426 rtas_table[token].name = name; 427 rtas_table[token].fn = fn; 428 } 429 430 int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr, 431 hwaddr rtas_size) 432 { 433 int ret; 434 int i; 435 436 ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size); 437 if (ret < 0) { 438 fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n", 439 fdt_strerror(ret)); 440 return ret; 441 } 442 443 ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-base", 444 rtas_addr); 445 if (ret < 0) { 446 fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n", 447 fdt_strerror(ret)); 448 return ret; 449 } 450 451 ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-entry", 452 rtas_addr); 453 if (ret < 0) { 454 fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n", 455 fdt_strerror(ret)); 456 return ret; 457 } 458 459 ret = qemu_fdt_setprop_cell(fdt, "/rtas", "rtas-size", 460 rtas_size); 461 if (ret < 0) { 462 fprintf(stderr, "Couldn't add rtas-size property: %s\n", 463 fdt_strerror(ret)); 464 return ret; 465 } 466 467 for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) { 468 struct rtas_call *call = &rtas_table[i]; 469 470 if (!call->name) { 471 continue; 472 } 473 474 ret = qemu_fdt_setprop_cell(fdt, "/rtas", call->name, 475 i + RTAS_TOKEN_BASE); 476 if (ret < 0) { 477 fprintf(stderr, "Couldn't add rtas token for %s: %s\n", 478 call->name, fdt_strerror(ret)); 479 return ret; 480 } 481 482 } 483 return 0; 484 } 485 486 static void core_rtas_register_types(void) 487 { 488 spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character", 489 rtas_display_character); 490 spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off); 491 spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot", 492 rtas_system_reboot); 493 spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state", 494 rtas_query_cpu_stopped_state); 495 spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu); 496 spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self); 497 spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER, 498 "ibm,get-system-parameter", 499 rtas_ibm_get_system_parameter); 500 spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER, 501 "ibm,set-system-parameter", 502 rtas_ibm_set_system_parameter); 503 spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term", 504 rtas_ibm_os_term); 505 spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level", 506 rtas_set_power_level); 507 spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level", 508 rtas_get_power_level); 509 spapr_rtas_register(RTAS_SET_INDICATOR, "set-indicator", 510 rtas_set_indicator); 511 } 512 513 type_init(core_rtas_register_types) 514