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 "hw/qdev.h" 33 #include "sysemu/device_tree.h" 34 #include "sysemu/cpus.h" 35 #include "sysemu/hw_accel.h" 36 37 #include "hw/ppc/spapr.h" 38 #include "hw/ppc/spapr_vio.h" 39 #include "hw/ppc/spapr_rtas.h" 40 #include "hw/ppc/spapr_cpu_core.h" 41 #include "hw/ppc/ppc.h" 42 #include "hw/boards.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 52 static void rtas_display_character(PowerPCCPU *cpu, sPAPRMachineState *spapr, 53 uint32_t token, uint32_t nargs, 54 target_ulong args, 55 uint32_t nret, target_ulong rets) 56 { 57 uint8_t c = rtas_ld(args, 0); 58 VIOsPAPRDevice *sdev = vty_lookup(spapr, 0); 59 60 if (!sdev) { 61 rtas_st(rets, 0, RTAS_OUT_HW_ERROR); 62 } else { 63 vty_putchars(sdev, &c, sizeof(c)); 64 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 65 } 66 } 67 68 static void rtas_power_off(PowerPCCPU *cpu, sPAPRMachineState *spapr, 69 uint32_t token, uint32_t nargs, target_ulong args, 70 uint32_t nret, target_ulong rets) 71 { 72 if (nargs != 2 || nret != 1) { 73 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 74 return; 75 } 76 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); 77 cpu_stop_current(); 78 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 79 } 80 81 static void rtas_system_reboot(PowerPCCPU *cpu, sPAPRMachineState *spapr, 82 uint32_t token, uint32_t nargs, 83 target_ulong args, 84 uint32_t nret, target_ulong rets) 85 { 86 if (nargs != 0 || nret != 1) { 87 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 88 return; 89 } 90 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 91 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 92 } 93 94 static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_, 95 sPAPRMachineState *spapr, 96 uint32_t token, uint32_t nargs, 97 target_ulong args, 98 uint32_t nret, target_ulong rets) 99 { 100 target_ulong id; 101 PowerPCCPU *cpu; 102 103 if (nargs != 1 || nret != 2) { 104 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 105 return; 106 } 107 108 id = rtas_ld(args, 0); 109 cpu = spapr_find_cpu(id); 110 if (cpu != NULL) { 111 if (CPU(cpu)->halted) { 112 rtas_st(rets, 1, 0); 113 } else { 114 rtas_st(rets, 1, 2); 115 } 116 117 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 118 return; 119 } 120 121 /* Didn't find a matching cpu */ 122 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 123 } 124 125 static void rtas_start_cpu(PowerPCCPU *callcpu, sPAPRMachineState *spapr, 126 uint32_t token, uint32_t nargs, 127 target_ulong args, 128 uint32_t nret, target_ulong rets) 129 { 130 target_ulong id, start, r3; 131 PowerPCCPU *newcpu; 132 CPUPPCState *env; 133 PowerPCCPUClass *pcc; 134 target_ulong lpcr; 135 136 if (nargs != 3 || nret != 1) { 137 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 138 return; 139 } 140 141 id = rtas_ld(args, 0); 142 start = rtas_ld(args, 1); 143 r3 = rtas_ld(args, 2); 144 145 newcpu = spapr_find_cpu(id); 146 if (!newcpu) { 147 /* Didn't find a matching cpu */ 148 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 149 return; 150 } 151 152 env = &newcpu->env; 153 pcc = POWERPC_CPU_GET_CLASS(newcpu); 154 155 if (!CPU(newcpu)->halted) { 156 rtas_st(rets, 0, RTAS_OUT_HW_ERROR); 157 return; 158 } 159 160 cpu_synchronize_state(CPU(newcpu)); 161 162 env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME); 163 164 /* Enable Power-saving mode Exit Cause exceptions for the new CPU */ 165 lpcr = env->spr[SPR_LPCR]; 166 if (!pcc->interrupts_big_endian(callcpu)) { 167 lpcr |= LPCR_ILE; 168 } 169 if (env->mmu_model == POWERPC_MMU_3_00) { 170 /* 171 * New cpus are expected to start in the same radix/hash mode 172 * as the existing CPUs 173 */ 174 if (ppc64_radix_guest(callcpu)) { 175 lpcr |= LPCR_UPRT | LPCR_GTSE; 176 } else { 177 lpcr &= ~(LPCR_UPRT | LPCR_GTSE); 178 } 179 } 180 ppc_store_lpcr(newcpu, lpcr); 181 182 /* 183 * Set the timebase offset of the new CPU to that of the invoking 184 * CPU. This helps hotplugged CPU to have the correct timebase 185 * offset. 186 */ 187 newcpu->env.tb_env->tb_offset = callcpu->env.tb_env->tb_offset; 188 189 spapr_cpu_set_entry_state(newcpu, start, r3); 190 191 qemu_cpu_kick(CPU(newcpu)); 192 193 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 194 } 195 196 static void rtas_stop_self(PowerPCCPU *cpu, sPAPRMachineState *spapr, 197 uint32_t token, uint32_t nargs, 198 target_ulong args, 199 uint32_t nret, target_ulong rets) 200 { 201 CPUState *cs = CPU(cpu); 202 CPUPPCState *env = &cpu->env; 203 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 204 205 /* Disable Power-saving mode Exit Cause exceptions for the CPU. 206 * This could deliver an interrupt on a dying CPU and crash the 207 * guest */ 208 ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm); 209 cs->halted = 1; 210 qemu_cpu_kick(cs); 211 } 212 213 static inline int sysparm_st(target_ulong addr, target_ulong len, 214 const void *val, uint16_t vallen) 215 { 216 hwaddr phys = ppc64_phys_to_real(addr); 217 218 if (len < 2) { 219 return RTAS_OUT_SYSPARM_PARAM_ERROR; 220 } 221 stw_be_phys(&address_space_memory, phys, vallen); 222 cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen)); 223 return RTAS_OUT_SUCCESS; 224 } 225 226 static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu, 227 sPAPRMachineState *spapr, 228 uint32_t token, uint32_t nargs, 229 target_ulong args, 230 uint32_t nret, target_ulong rets) 231 { 232 target_ulong parameter = rtas_ld(args, 0); 233 target_ulong buffer = rtas_ld(args, 1); 234 target_ulong length = rtas_ld(args, 2); 235 target_ulong ret; 236 237 switch (parameter) { 238 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: { 239 char *param_val = g_strdup_printf("MaxEntCap=%d," 240 "DesMem=%llu," 241 "DesProcs=%d," 242 "MaxPlatProcs=%d", 243 max_cpus, 244 current_machine->ram_size / M_BYTE, 245 smp_cpus, 246 max_cpus); 247 ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1); 248 g_free(param_val); 249 break; 250 } 251 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: { 252 uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED; 253 254 ret = sysparm_st(buffer, length, ¶m_val, sizeof(param_val)); 255 break; 256 } 257 case RTAS_SYSPARM_UUID: 258 ret = sysparm_st(buffer, length, (unsigned char *)&qemu_uuid, 259 (qemu_uuid_set ? 16 : 0)); 260 break; 261 default: 262 ret = RTAS_OUT_NOT_SUPPORTED; 263 } 264 265 rtas_st(rets, 0, ret); 266 } 267 268 static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu, 269 sPAPRMachineState *spapr, 270 uint32_t token, uint32_t nargs, 271 target_ulong args, 272 uint32_t nret, target_ulong rets) 273 { 274 target_ulong parameter = rtas_ld(args, 0); 275 target_ulong ret = RTAS_OUT_NOT_SUPPORTED; 276 277 switch (parameter) { 278 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: 279 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: 280 case RTAS_SYSPARM_UUID: 281 ret = RTAS_OUT_NOT_AUTHORIZED; 282 break; 283 } 284 285 rtas_st(rets, 0, ret); 286 } 287 288 static void rtas_ibm_os_term(PowerPCCPU *cpu, 289 sPAPRMachineState *spapr, 290 uint32_t token, uint32_t nargs, 291 target_ulong args, 292 uint32_t nret, target_ulong rets) 293 { 294 qemu_system_guest_panicked(NULL); 295 296 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 297 } 298 299 static void rtas_set_power_level(PowerPCCPU *cpu, sPAPRMachineState *spapr, 300 uint32_t token, uint32_t nargs, 301 target_ulong args, uint32_t nret, 302 target_ulong rets) 303 { 304 int32_t power_domain; 305 306 if (nargs != 2 || nret != 2) { 307 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 308 return; 309 } 310 311 /* we currently only use a single, "live insert" powerdomain for 312 * hotplugged/dlpar'd resources, so the power is always live/full (100) 313 */ 314 power_domain = rtas_ld(args, 0); 315 if (power_domain != -1) { 316 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); 317 return; 318 } 319 320 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 321 rtas_st(rets, 1, 100); 322 } 323 324 static void rtas_get_power_level(PowerPCCPU *cpu, sPAPRMachineState *spapr, 325 uint32_t token, uint32_t nargs, 326 target_ulong args, uint32_t nret, 327 target_ulong rets) 328 { 329 int32_t power_domain; 330 331 if (nargs != 1 || nret != 2) { 332 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 333 return; 334 } 335 336 /* we currently only use a single, "live insert" powerdomain for 337 * hotplugged/dlpar'd resources, so the power is always live/full (100) 338 */ 339 power_domain = rtas_ld(args, 0); 340 if (power_domain != -1) { 341 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); 342 return; 343 } 344 345 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 346 rtas_st(rets, 1, 100); 347 } 348 349 static struct rtas_call { 350 const char *name; 351 spapr_rtas_fn fn; 352 } rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE]; 353 354 target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPRMachineState *spapr, 355 uint32_t token, uint32_t nargs, target_ulong args, 356 uint32_t nret, target_ulong rets) 357 { 358 if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) { 359 struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE); 360 361 if (call->fn) { 362 call->fn(cpu, spapr, token, nargs, args, nret, rets); 363 return H_SUCCESS; 364 } 365 } 366 367 /* HACK: Some Linux early debug code uses RTAS display-character, 368 * but assumes the token value is 0xa (which it is on some real 369 * machines) without looking it up in the device tree. This 370 * special case makes this work */ 371 if (token == 0xa) { 372 rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets); 373 return H_SUCCESS; 374 } 375 376 hcall_dprintf("Unknown RTAS token 0x%x\n", token); 377 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 378 return H_PARAMETER; 379 } 380 381 uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args, 382 uint32_t nret, uint64_t rets) 383 { 384 int token; 385 386 for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) { 387 if (strcmp(cmd, rtas_table[token].name) == 0) { 388 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); 389 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 390 391 rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE, 392 nargs, args, nret, rets); 393 return H_SUCCESS; 394 } 395 } 396 return H_PARAMETER; 397 } 398 399 void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn) 400 { 401 assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)); 402 403 token -= RTAS_TOKEN_BASE; 404 405 assert(!rtas_table[token].name); 406 407 rtas_table[token].name = name; 408 rtas_table[token].fn = fn; 409 } 410 411 void spapr_dt_rtas_tokens(void *fdt, int rtas) 412 { 413 int i; 414 415 for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) { 416 struct rtas_call *call = &rtas_table[i]; 417 418 if (!call->name) { 419 continue; 420 } 421 422 _FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE)); 423 } 424 } 425 426 void spapr_load_rtas(sPAPRMachineState *spapr, void *fdt, hwaddr addr) 427 { 428 int rtas_node; 429 int ret; 430 431 /* Copy RTAS blob into guest RAM */ 432 cpu_physical_memory_write(addr, spapr->rtas_blob, spapr->rtas_size); 433 434 ret = fdt_add_mem_rsv(fdt, addr, spapr->rtas_size); 435 if (ret < 0) { 436 error_report("Couldn't add RTAS reserve entry: %s", 437 fdt_strerror(ret)); 438 exit(1); 439 } 440 441 /* Update the device tree with the blob's location */ 442 rtas_node = fdt_path_offset(fdt, "/rtas"); 443 assert(rtas_node >= 0); 444 445 ret = fdt_setprop_cell(fdt, rtas_node, "linux,rtas-base", addr); 446 if (ret < 0) { 447 error_report("Couldn't add linux,rtas-base property: %s", 448 fdt_strerror(ret)); 449 exit(1); 450 } 451 452 ret = fdt_setprop_cell(fdt, rtas_node, "linux,rtas-entry", addr); 453 if (ret < 0) { 454 error_report("Couldn't add linux,rtas-entry property: %s", 455 fdt_strerror(ret)); 456 exit(1); 457 } 458 459 ret = fdt_setprop_cell(fdt, rtas_node, "rtas-size", spapr->rtas_size); 460 if (ret < 0) { 461 error_report("Couldn't add rtas-size property: %s", 462 fdt_strerror(ret)); 463 exit(1); 464 } 465 } 466 467 static void core_rtas_register_types(void) 468 { 469 spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character", 470 rtas_display_character); 471 spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off); 472 spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot", 473 rtas_system_reboot); 474 spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state", 475 rtas_query_cpu_stopped_state); 476 spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu); 477 spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self); 478 spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER, 479 "ibm,get-system-parameter", 480 rtas_ibm_get_system_parameter); 481 spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER, 482 "ibm,set-system-parameter", 483 rtas_ibm_set_system_parameter); 484 spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term", 485 rtas_ibm_os_term); 486 spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level", 487 rtas_set_power_level); 488 spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level", 489 rtas_get_power_level); 490 } 491 492 type_init(core_rtas_register_types) 493