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 54 static 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 70 static 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 83 static 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 96 static 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 } 126 127 static 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 PowerPCCPUClass *pcc; 136 target_ulong 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 pcc = POWERPC_CPU_GET_CLASS(newcpu); 156 157 if (!CPU(newcpu)->halted) { 158 rtas_st(rets, 0, RTAS_OUT_HW_ERROR); 159 return; 160 } 161 162 cpu_synchronize_state(CPU(newcpu)); 163 164 env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME); 165 166 /* Enable Power-saving mode Exit Cause exceptions for the new CPU */ 167 lpcr = env->spr[SPR_LPCR]; 168 if (!pcc->interrupts_big_endian(callcpu)) { 169 lpcr |= LPCR_ILE; 170 } 171 if (env->mmu_model == POWERPC_MMU_3_00) { 172 /* 173 * New cpus are expected to start in the same radix/hash mode 174 * as the existing CPUs 175 */ 176 if (ppc64_v3_radix(callcpu)) { 177 lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR; 178 } else { 179 lpcr &= ~(LPCR_UPRT | LPCR_GTSE | LPCR_HR); 180 } 181 env->spr[SPR_PSSCR] &= ~PSSCR_EC; 182 } 183 ppc_store_lpcr(newcpu, lpcr); 184 185 /* 186 * Set the timebase offset of the new CPU to that of the invoking 187 * CPU. This helps hotplugged CPU to have the correct timebase 188 * offset. 189 */ 190 newcpu->env.tb_env->tb_offset = callcpu->env.tb_env->tb_offset; 191 192 spapr_cpu_set_entry_state(newcpu, start, r3); 193 194 qemu_cpu_kick(CPU(newcpu)); 195 196 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 197 } 198 199 static void rtas_stop_self(PowerPCCPU *cpu, SpaprMachineState *spapr, 200 uint32_t token, uint32_t nargs, 201 target_ulong args, 202 uint32_t nret, target_ulong rets) 203 { 204 CPUState *cs = CPU(cpu); 205 CPUPPCState *env = &cpu->env; 206 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 207 208 /* Disable Power-saving mode Exit Cause exceptions for the CPU. 209 * This could deliver an interrupt on a dying CPU and crash the 210 * guest. 211 * For the same reason, set PSSCR_EC. 212 */ 213 ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm); 214 env->spr[SPR_PSSCR] |= PSSCR_EC; 215 cs->halted = 1; 216 kvmppc_set_reg_ppc_online(cpu, 0); 217 qemu_cpu_kick(cs); 218 } 219 220 static void rtas_ibm_suspend_me(PowerPCCPU *cpu, SpaprMachineState *spapr, 221 uint32_t token, uint32_t nargs, 222 target_ulong args, 223 uint32_t nret, target_ulong rets) 224 { 225 CPUState *cs; 226 227 if (nargs != 0 || nret != 1) { 228 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 229 return; 230 } 231 232 CPU_FOREACH(cs) { 233 PowerPCCPU *c = POWERPC_CPU(cs); 234 CPUPPCState *e = &c->env; 235 if (c == cpu) { 236 continue; 237 } 238 239 /* See h_join */ 240 if (!cs->halted || (e->msr & (1ULL << MSR_EE))) { 241 rtas_st(rets, 0, H_MULTI_THREADS_ACTIVE); 242 return; 243 } 244 } 245 246 qemu_system_suspend_request(); 247 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 248 } 249 250 static inline int sysparm_st(target_ulong addr, target_ulong len, 251 const void *val, uint16_t vallen) 252 { 253 hwaddr phys = ppc64_phys_to_real(addr); 254 255 if (len < 2) { 256 return RTAS_OUT_SYSPARM_PARAM_ERROR; 257 } 258 stw_be_phys(&address_space_memory, phys, vallen); 259 cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen)); 260 return RTAS_OUT_SUCCESS; 261 } 262 263 static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu, 264 SpaprMachineState *spapr, 265 uint32_t token, uint32_t nargs, 266 target_ulong args, 267 uint32_t nret, target_ulong rets) 268 { 269 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 270 MachineState *ms = MACHINE(qdev_get_machine()); 271 unsigned int max_cpus = ms->smp.max_cpus; 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 max_cpus, 284 current_machine->ram_size / MiB, 285 ms->smp.cpus, 286 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, ¶m_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 } 321 322 static 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 } 341 342 static 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 qemu_system_guest_panicked(NULL); 349 350 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 351 } 352 353 static void rtas_set_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr, 354 uint32_t token, uint32_t nargs, 355 target_ulong args, uint32_t nret, 356 target_ulong rets) 357 { 358 int32_t power_domain; 359 360 if (nargs != 2 || nret != 2) { 361 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 362 return; 363 } 364 365 /* we currently only use a single, "live insert" powerdomain for 366 * hotplugged/dlpar'd resources, so the power is always live/full (100) 367 */ 368 power_domain = rtas_ld(args, 0); 369 if (power_domain != -1) { 370 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); 371 return; 372 } 373 374 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 375 rtas_st(rets, 1, 100); 376 } 377 378 static void rtas_get_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr, 379 uint32_t token, uint32_t nargs, 380 target_ulong args, uint32_t nret, 381 target_ulong rets) 382 { 383 int32_t power_domain; 384 385 if (nargs != 1 || nret != 2) { 386 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 387 return; 388 } 389 390 /* we currently only use a single, "live insert" powerdomain for 391 * hotplugged/dlpar'd resources, so the power is always live/full (100) 392 */ 393 power_domain = rtas_ld(args, 0); 394 if (power_domain != -1) { 395 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); 396 return; 397 } 398 399 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 400 rtas_st(rets, 1, 100); 401 } 402 403 static struct rtas_call { 404 const char *name; 405 spapr_rtas_fn fn; 406 } rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE]; 407 408 target_ulong spapr_rtas_call(PowerPCCPU *cpu, SpaprMachineState *spapr, 409 uint32_t token, uint32_t nargs, target_ulong args, 410 uint32_t nret, target_ulong rets) 411 { 412 if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) { 413 struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE); 414 415 if (call->fn) { 416 call->fn(cpu, spapr, token, nargs, args, nret, rets); 417 return H_SUCCESS; 418 } 419 } 420 421 /* HACK: Some Linux early debug code uses RTAS display-character, 422 * but assumes the token value is 0xa (which it is on some real 423 * machines) without looking it up in the device tree. This 424 * special case makes this work */ 425 if (token == 0xa) { 426 rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets); 427 return H_SUCCESS; 428 } 429 430 hcall_dprintf("Unknown RTAS token 0x%x\n", token); 431 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 432 return H_PARAMETER; 433 } 434 435 uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args, 436 uint32_t nret, uint64_t rets) 437 { 438 int token; 439 440 for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) { 441 if (strcmp(cmd, rtas_table[token].name) == 0) { 442 SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); 443 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 444 445 rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE, 446 nargs, args, nret, rets); 447 return H_SUCCESS; 448 } 449 } 450 return H_PARAMETER; 451 } 452 453 void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn) 454 { 455 assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)); 456 457 token -= RTAS_TOKEN_BASE; 458 459 assert(!name || !rtas_table[token].name); 460 461 rtas_table[token].name = name; 462 rtas_table[token].fn = fn; 463 } 464 465 void spapr_dt_rtas_tokens(void *fdt, int rtas) 466 { 467 int i; 468 469 for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) { 470 struct rtas_call *call = &rtas_table[i]; 471 472 if (!call->name) { 473 continue; 474 } 475 476 _FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE)); 477 } 478 } 479 480 static void core_rtas_register_types(void) 481 { 482 spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character", 483 rtas_display_character); 484 spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off); 485 spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot", 486 rtas_system_reboot); 487 spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state", 488 rtas_query_cpu_stopped_state); 489 spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu); 490 spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self); 491 spapr_rtas_register(RTAS_IBM_SUSPEND_ME, "ibm,suspend-me", 492 rtas_ibm_suspend_me); 493 spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER, 494 "ibm,get-system-parameter", 495 rtas_ibm_get_system_parameter); 496 spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER, 497 "ibm,set-system-parameter", 498 rtas_ibm_set_system_parameter); 499 spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term", 500 rtas_ibm_os_term); 501 spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level", 502 rtas_set_power_level); 503 spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level", 504 rtas_get_power_level); 505 } 506 507 type_init(core_rtas_register_types) 508