1 #include "qemu/osdep.h" 2 #include "qapi/error.h" 3 #include "sysemu/hw_accel.h" 4 #include "sysemu/sysemu.h" 5 #include "qemu/log.h" 6 #include "qemu/error-report.h" 7 #include "cpu.h" 8 #include "exec/exec-all.h" 9 #include "helper_regs.h" 10 #include "hw/ppc/spapr.h" 11 #include "hw/ppc/spapr_cpu_core.h" 12 #include "mmu-hash64.h" 13 #include "cpu-models.h" 14 #include "trace.h" 15 #include "kvm_ppc.h" 16 #include "hw/ppc/spapr_ovec.h" 17 #include "mmu-book3s-v3.h" 18 #include "hw/mem/memory-device.h" 19 20 struct LPCRSyncState { 21 target_ulong value; 22 target_ulong mask; 23 }; 24 25 static void do_lpcr_sync(CPUState *cs, run_on_cpu_data arg) 26 { 27 struct LPCRSyncState *s = arg.host_ptr; 28 PowerPCCPU *cpu = POWERPC_CPU(cs); 29 CPUPPCState *env = &cpu->env; 30 target_ulong lpcr; 31 32 cpu_synchronize_state(cs); 33 lpcr = env->spr[SPR_LPCR]; 34 lpcr &= ~s->mask; 35 lpcr |= s->value; 36 ppc_store_lpcr(cpu, lpcr); 37 } 38 39 static void set_all_lpcrs(target_ulong value, target_ulong mask) 40 { 41 CPUState *cs; 42 struct LPCRSyncState s = { 43 .value = value, 44 .mask = mask 45 }; 46 CPU_FOREACH(cs) { 47 run_on_cpu(cs, do_lpcr_sync, RUN_ON_CPU_HOST_PTR(&s)); 48 } 49 } 50 51 static bool has_spr(PowerPCCPU *cpu, int spr) 52 { 53 /* We can test whether the SPR is defined by checking for a valid name */ 54 return cpu->env.spr_cb[spr].name != NULL; 55 } 56 57 static inline bool valid_ptex(PowerPCCPU *cpu, target_ulong ptex) 58 { 59 /* 60 * hash value/pteg group index is normalized by HPT mask 61 */ 62 if (((ptex & ~7ULL) / HPTES_PER_GROUP) & ~ppc_hash64_hpt_mask(cpu)) { 63 return false; 64 } 65 return true; 66 } 67 68 static bool is_ram_address(sPAPRMachineState *spapr, hwaddr addr) 69 { 70 MachineState *machine = MACHINE(spapr); 71 DeviceMemoryState *dms = machine->device_memory; 72 73 if (addr < machine->ram_size) { 74 return true; 75 } 76 if ((addr >= dms->base) 77 && ((addr - dms->base) < memory_region_size(&dms->mr))) { 78 return true; 79 } 80 81 return false; 82 } 83 84 static target_ulong h_enter(PowerPCCPU *cpu, sPAPRMachineState *spapr, 85 target_ulong opcode, target_ulong *args) 86 { 87 target_ulong flags = args[0]; 88 target_ulong ptex = args[1]; 89 target_ulong pteh = args[2]; 90 target_ulong ptel = args[3]; 91 unsigned apshift; 92 target_ulong raddr; 93 target_ulong slot; 94 const ppc_hash_pte64_t *hptes; 95 96 apshift = ppc_hash64_hpte_page_shift_noslb(cpu, pteh, ptel); 97 if (!apshift) { 98 /* Bad page size encoding */ 99 return H_PARAMETER; 100 } 101 102 raddr = (ptel & HPTE64_R_RPN) & ~((1ULL << apshift) - 1); 103 104 if (is_ram_address(spapr, raddr)) { 105 /* Regular RAM - should have WIMG=0010 */ 106 if ((ptel & HPTE64_R_WIMG) != HPTE64_R_M) { 107 return H_PARAMETER; 108 } 109 } else { 110 target_ulong wimg_flags; 111 /* Looks like an IO address */ 112 /* FIXME: What WIMG combinations could be sensible for IO? 113 * For now we allow WIMG=010x, but are there others? */ 114 /* FIXME: Should we check against registered IO addresses? */ 115 wimg_flags = (ptel & (HPTE64_R_W | HPTE64_R_I | HPTE64_R_M)); 116 117 if (wimg_flags != HPTE64_R_I && 118 wimg_flags != (HPTE64_R_I | HPTE64_R_M)) { 119 return H_PARAMETER; 120 } 121 } 122 123 pteh &= ~0x60ULL; 124 125 if (!valid_ptex(cpu, ptex)) { 126 return H_PARAMETER; 127 } 128 129 slot = ptex & 7ULL; 130 ptex = ptex & ~7ULL; 131 132 if (likely((flags & H_EXACT) == 0)) { 133 hptes = ppc_hash64_map_hptes(cpu, ptex, HPTES_PER_GROUP); 134 for (slot = 0; slot < 8; slot++) { 135 if (!(ppc_hash64_hpte0(cpu, hptes, slot) & HPTE64_V_VALID)) { 136 break; 137 } 138 } 139 ppc_hash64_unmap_hptes(cpu, hptes, ptex, HPTES_PER_GROUP); 140 if (slot == 8) { 141 return H_PTEG_FULL; 142 } 143 } else { 144 hptes = ppc_hash64_map_hptes(cpu, ptex + slot, 1); 145 if (ppc_hash64_hpte0(cpu, hptes, 0) & HPTE64_V_VALID) { 146 ppc_hash64_unmap_hptes(cpu, hptes, ptex + slot, 1); 147 return H_PTEG_FULL; 148 } 149 ppc_hash64_unmap_hptes(cpu, hptes, ptex, 1); 150 } 151 152 ppc_hash64_store_hpte(cpu, ptex + slot, pteh | HPTE64_V_HPTE_DIRTY, ptel); 153 154 args[0] = ptex + slot; 155 return H_SUCCESS; 156 } 157 158 typedef enum { 159 REMOVE_SUCCESS = 0, 160 REMOVE_NOT_FOUND = 1, 161 REMOVE_PARM = 2, 162 REMOVE_HW = 3, 163 } RemoveResult; 164 165 static RemoveResult remove_hpte(PowerPCCPU *cpu, target_ulong ptex, 166 target_ulong avpn, 167 target_ulong flags, 168 target_ulong *vp, target_ulong *rp) 169 { 170 const ppc_hash_pte64_t *hptes; 171 target_ulong v, r; 172 173 if (!valid_ptex(cpu, ptex)) { 174 return REMOVE_PARM; 175 } 176 177 hptes = ppc_hash64_map_hptes(cpu, ptex, 1); 178 v = ppc_hash64_hpte0(cpu, hptes, 0); 179 r = ppc_hash64_hpte1(cpu, hptes, 0); 180 ppc_hash64_unmap_hptes(cpu, hptes, ptex, 1); 181 182 if ((v & HPTE64_V_VALID) == 0 || 183 ((flags & H_AVPN) && (v & ~0x7fULL) != avpn) || 184 ((flags & H_ANDCOND) && (v & avpn) != 0)) { 185 return REMOVE_NOT_FOUND; 186 } 187 *vp = v; 188 *rp = r; 189 ppc_hash64_store_hpte(cpu, ptex, HPTE64_V_HPTE_DIRTY, 0); 190 ppc_hash64_tlb_flush_hpte(cpu, ptex, v, r); 191 return REMOVE_SUCCESS; 192 } 193 194 static target_ulong h_remove(PowerPCCPU *cpu, sPAPRMachineState *spapr, 195 target_ulong opcode, target_ulong *args) 196 { 197 CPUPPCState *env = &cpu->env; 198 target_ulong flags = args[0]; 199 target_ulong ptex = args[1]; 200 target_ulong avpn = args[2]; 201 RemoveResult ret; 202 203 ret = remove_hpte(cpu, ptex, avpn, flags, 204 &args[0], &args[1]); 205 206 switch (ret) { 207 case REMOVE_SUCCESS: 208 check_tlb_flush(env, true); 209 return H_SUCCESS; 210 211 case REMOVE_NOT_FOUND: 212 return H_NOT_FOUND; 213 214 case REMOVE_PARM: 215 return H_PARAMETER; 216 217 case REMOVE_HW: 218 return H_HARDWARE; 219 } 220 221 g_assert_not_reached(); 222 } 223 224 #define H_BULK_REMOVE_TYPE 0xc000000000000000ULL 225 #define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL 226 #define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL 227 #define H_BULK_REMOVE_END 0xc000000000000000ULL 228 #define H_BULK_REMOVE_CODE 0x3000000000000000ULL 229 #define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL 230 #define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL 231 #define H_BULK_REMOVE_PARM 0x2000000000000000ULL 232 #define H_BULK_REMOVE_HW 0x3000000000000000ULL 233 #define H_BULK_REMOVE_RC 0x0c00000000000000ULL 234 #define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL 235 #define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL 236 #define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL 237 #define H_BULK_REMOVE_AVPN 0x0200000000000000ULL 238 #define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL 239 240 #define H_BULK_REMOVE_MAX_BATCH 4 241 242 static target_ulong h_bulk_remove(PowerPCCPU *cpu, sPAPRMachineState *spapr, 243 target_ulong opcode, target_ulong *args) 244 { 245 CPUPPCState *env = &cpu->env; 246 int i; 247 target_ulong rc = H_SUCCESS; 248 249 for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) { 250 target_ulong *tsh = &args[i*2]; 251 target_ulong tsl = args[i*2 + 1]; 252 target_ulong v, r, ret; 253 254 if ((*tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) { 255 break; 256 } else if ((*tsh & H_BULK_REMOVE_TYPE) != H_BULK_REMOVE_REQUEST) { 257 return H_PARAMETER; 258 } 259 260 *tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS; 261 *tsh |= H_BULK_REMOVE_RESPONSE; 262 263 if ((*tsh & H_BULK_REMOVE_ANDCOND) && (*tsh & H_BULK_REMOVE_AVPN)) { 264 *tsh |= H_BULK_REMOVE_PARM; 265 return H_PARAMETER; 266 } 267 268 ret = remove_hpte(cpu, *tsh & H_BULK_REMOVE_PTEX, tsl, 269 (*tsh & H_BULK_REMOVE_FLAGS) >> 26, 270 &v, &r); 271 272 *tsh |= ret << 60; 273 274 switch (ret) { 275 case REMOVE_SUCCESS: 276 *tsh |= (r & (HPTE64_R_C | HPTE64_R_R)) << 43; 277 break; 278 279 case REMOVE_PARM: 280 rc = H_PARAMETER; 281 goto exit; 282 283 case REMOVE_HW: 284 rc = H_HARDWARE; 285 goto exit; 286 } 287 } 288 exit: 289 check_tlb_flush(env, true); 290 291 return rc; 292 } 293 294 static target_ulong h_protect(PowerPCCPU *cpu, sPAPRMachineState *spapr, 295 target_ulong opcode, target_ulong *args) 296 { 297 CPUPPCState *env = &cpu->env; 298 target_ulong flags = args[0]; 299 target_ulong ptex = args[1]; 300 target_ulong avpn = args[2]; 301 const ppc_hash_pte64_t *hptes; 302 target_ulong v, r; 303 304 if (!valid_ptex(cpu, ptex)) { 305 return H_PARAMETER; 306 } 307 308 hptes = ppc_hash64_map_hptes(cpu, ptex, 1); 309 v = ppc_hash64_hpte0(cpu, hptes, 0); 310 r = ppc_hash64_hpte1(cpu, hptes, 0); 311 ppc_hash64_unmap_hptes(cpu, hptes, ptex, 1); 312 313 if ((v & HPTE64_V_VALID) == 0 || 314 ((flags & H_AVPN) && (v & ~0x7fULL) != avpn)) { 315 return H_NOT_FOUND; 316 } 317 318 r &= ~(HPTE64_R_PP0 | HPTE64_R_PP | HPTE64_R_N | 319 HPTE64_R_KEY_HI | HPTE64_R_KEY_LO); 320 r |= (flags << 55) & HPTE64_R_PP0; 321 r |= (flags << 48) & HPTE64_R_KEY_HI; 322 r |= flags & (HPTE64_R_PP | HPTE64_R_N | HPTE64_R_KEY_LO); 323 ppc_hash64_store_hpte(cpu, ptex, 324 (v & ~HPTE64_V_VALID) | HPTE64_V_HPTE_DIRTY, 0); 325 ppc_hash64_tlb_flush_hpte(cpu, ptex, v, r); 326 /* Flush the tlb */ 327 check_tlb_flush(env, true); 328 /* Don't need a memory barrier, due to qemu's global lock */ 329 ppc_hash64_store_hpte(cpu, ptex, v | HPTE64_V_HPTE_DIRTY, r); 330 return H_SUCCESS; 331 } 332 333 static target_ulong h_read(PowerPCCPU *cpu, sPAPRMachineState *spapr, 334 target_ulong opcode, target_ulong *args) 335 { 336 target_ulong flags = args[0]; 337 target_ulong ptex = args[1]; 338 uint8_t *hpte; 339 int i, ridx, n_entries = 1; 340 341 if (!valid_ptex(cpu, ptex)) { 342 return H_PARAMETER; 343 } 344 345 if (flags & H_READ_4) { 346 /* Clear the two low order bits */ 347 ptex &= ~(3ULL); 348 n_entries = 4; 349 } 350 351 hpte = spapr->htab + (ptex * HASH_PTE_SIZE_64); 352 353 for (i = 0, ridx = 0; i < n_entries; i++) { 354 args[ridx++] = ldq_p(hpte); 355 args[ridx++] = ldq_p(hpte + (HASH_PTE_SIZE_64/2)); 356 hpte += HASH_PTE_SIZE_64; 357 } 358 359 return H_SUCCESS; 360 } 361 362 struct sPAPRPendingHPT { 363 /* These fields are read-only after initialization */ 364 int shift; 365 QemuThread thread; 366 367 /* These fields are protected by the BQL */ 368 bool complete; 369 370 /* These fields are private to the preparation thread if 371 * !complete, otherwise protected by the BQL */ 372 int ret; 373 void *hpt; 374 }; 375 376 static void free_pending_hpt(sPAPRPendingHPT *pending) 377 { 378 if (pending->hpt) { 379 qemu_vfree(pending->hpt); 380 } 381 382 g_free(pending); 383 } 384 385 static void *hpt_prepare_thread(void *opaque) 386 { 387 sPAPRPendingHPT *pending = opaque; 388 size_t size = 1ULL << pending->shift; 389 390 pending->hpt = qemu_memalign(size, size); 391 if (pending->hpt) { 392 memset(pending->hpt, 0, size); 393 pending->ret = H_SUCCESS; 394 } else { 395 pending->ret = H_NO_MEM; 396 } 397 398 qemu_mutex_lock_iothread(); 399 400 if (SPAPR_MACHINE(qdev_get_machine())->pending_hpt == pending) { 401 /* Ready to go */ 402 pending->complete = true; 403 } else { 404 /* We've been cancelled, clean ourselves up */ 405 free_pending_hpt(pending); 406 } 407 408 qemu_mutex_unlock_iothread(); 409 return NULL; 410 } 411 412 /* Must be called with BQL held */ 413 static void cancel_hpt_prepare(sPAPRMachineState *spapr) 414 { 415 sPAPRPendingHPT *pending = spapr->pending_hpt; 416 417 /* Let the thread know it's cancelled */ 418 spapr->pending_hpt = NULL; 419 420 if (!pending) { 421 /* Nothing to do */ 422 return; 423 } 424 425 if (!pending->complete) { 426 /* thread will clean itself up */ 427 return; 428 } 429 430 free_pending_hpt(pending); 431 } 432 433 /* Convert a return code from the KVM ioctl()s implementing resize HPT 434 * into a PAPR hypercall return code */ 435 static target_ulong resize_hpt_convert_rc(int ret) 436 { 437 if (ret >= 100000) { 438 return H_LONG_BUSY_ORDER_100_SEC; 439 } else if (ret >= 10000) { 440 return H_LONG_BUSY_ORDER_10_SEC; 441 } else if (ret >= 1000) { 442 return H_LONG_BUSY_ORDER_1_SEC; 443 } else if (ret >= 100) { 444 return H_LONG_BUSY_ORDER_100_MSEC; 445 } else if (ret >= 10) { 446 return H_LONG_BUSY_ORDER_10_MSEC; 447 } else if (ret > 0) { 448 return H_LONG_BUSY_ORDER_1_MSEC; 449 } 450 451 switch (ret) { 452 case 0: 453 return H_SUCCESS; 454 case -EPERM: 455 return H_AUTHORITY; 456 case -EINVAL: 457 return H_PARAMETER; 458 case -ENXIO: 459 return H_CLOSED; 460 case -ENOSPC: 461 return H_PTEG_FULL; 462 case -EBUSY: 463 return H_BUSY; 464 case -ENOMEM: 465 return H_NO_MEM; 466 default: 467 return H_HARDWARE; 468 } 469 } 470 471 static target_ulong h_resize_hpt_prepare(PowerPCCPU *cpu, 472 sPAPRMachineState *spapr, 473 target_ulong opcode, 474 target_ulong *args) 475 { 476 target_ulong flags = args[0]; 477 int shift = args[1]; 478 sPAPRPendingHPT *pending = spapr->pending_hpt; 479 uint64_t current_ram_size; 480 int rc; 481 482 if (spapr->resize_hpt == SPAPR_RESIZE_HPT_DISABLED) { 483 return H_AUTHORITY; 484 } 485 486 if (!spapr->htab_shift) { 487 /* Radix guest, no HPT */ 488 return H_NOT_AVAILABLE; 489 } 490 491 trace_spapr_h_resize_hpt_prepare(flags, shift); 492 493 if (flags != 0) { 494 return H_PARAMETER; 495 } 496 497 if (shift && ((shift < 18) || (shift > 46))) { 498 return H_PARAMETER; 499 } 500 501 current_ram_size = MACHINE(spapr)->ram_size + get_plugged_memory_size(); 502 503 /* We only allow the guest to allocate an HPT one order above what 504 * we'd normally give them (to stop a small guest claiming a huge 505 * chunk of resources in the HPT */ 506 if (shift > (spapr_hpt_shift_for_ramsize(current_ram_size) + 1)) { 507 return H_RESOURCE; 508 } 509 510 rc = kvmppc_resize_hpt_prepare(cpu, flags, shift); 511 if (rc != -ENOSYS) { 512 return resize_hpt_convert_rc(rc); 513 } 514 515 if (pending) { 516 /* something already in progress */ 517 if (pending->shift == shift) { 518 /* and it's suitable */ 519 if (pending->complete) { 520 return pending->ret; 521 } else { 522 return H_LONG_BUSY_ORDER_100_MSEC; 523 } 524 } 525 526 /* not suitable, cancel and replace */ 527 cancel_hpt_prepare(spapr); 528 } 529 530 if (!shift) { 531 /* nothing to do */ 532 return H_SUCCESS; 533 } 534 535 /* start new prepare */ 536 537 pending = g_new0(sPAPRPendingHPT, 1); 538 pending->shift = shift; 539 pending->ret = H_HARDWARE; 540 541 qemu_thread_create(&pending->thread, "sPAPR HPT prepare", 542 hpt_prepare_thread, pending, QEMU_THREAD_DETACHED); 543 544 spapr->pending_hpt = pending; 545 546 /* In theory we could estimate the time more accurately based on 547 * the new size, but there's not much point */ 548 return H_LONG_BUSY_ORDER_100_MSEC; 549 } 550 551 static uint64_t new_hpte_load0(void *htab, uint64_t pteg, int slot) 552 { 553 uint8_t *addr = htab; 554 555 addr += pteg * HASH_PTEG_SIZE_64; 556 addr += slot * HASH_PTE_SIZE_64; 557 return ldq_p(addr); 558 } 559 560 static void new_hpte_store(void *htab, uint64_t pteg, int slot, 561 uint64_t pte0, uint64_t pte1) 562 { 563 uint8_t *addr = htab; 564 565 addr += pteg * HASH_PTEG_SIZE_64; 566 addr += slot * HASH_PTE_SIZE_64; 567 568 stq_p(addr, pte0); 569 stq_p(addr + HASH_PTE_SIZE_64 / 2, pte1); 570 } 571 572 static int rehash_hpte(PowerPCCPU *cpu, 573 const ppc_hash_pte64_t *hptes, 574 void *old_hpt, uint64_t oldsize, 575 void *new_hpt, uint64_t newsize, 576 uint64_t pteg, int slot) 577 { 578 uint64_t old_hash_mask = (oldsize >> 7) - 1; 579 uint64_t new_hash_mask = (newsize >> 7) - 1; 580 target_ulong pte0 = ppc_hash64_hpte0(cpu, hptes, slot); 581 target_ulong pte1; 582 uint64_t avpn; 583 unsigned base_pg_shift; 584 uint64_t hash, new_pteg, replace_pte0; 585 586 if (!(pte0 & HPTE64_V_VALID) || !(pte0 & HPTE64_V_BOLTED)) { 587 return H_SUCCESS; 588 } 589 590 pte1 = ppc_hash64_hpte1(cpu, hptes, slot); 591 592 base_pg_shift = ppc_hash64_hpte_page_shift_noslb(cpu, pte0, pte1); 593 assert(base_pg_shift); /* H_ENTER shouldn't allow a bad encoding */ 594 avpn = HPTE64_V_AVPN_VAL(pte0) & ~(((1ULL << base_pg_shift) - 1) >> 23); 595 596 if (pte0 & HPTE64_V_SECONDARY) { 597 pteg = ~pteg; 598 } 599 600 if ((pte0 & HPTE64_V_SSIZE) == HPTE64_V_SSIZE_256M) { 601 uint64_t offset, vsid; 602 603 /* We only have 28 - 23 bits of offset in avpn */ 604 offset = (avpn & 0x1f) << 23; 605 vsid = avpn >> 5; 606 /* We can find more bits from the pteg value */ 607 if (base_pg_shift < 23) { 608 offset |= ((vsid ^ pteg) & old_hash_mask) << base_pg_shift; 609 } 610 611 hash = vsid ^ (offset >> base_pg_shift); 612 } else if ((pte0 & HPTE64_V_SSIZE) == HPTE64_V_SSIZE_1T) { 613 uint64_t offset, vsid; 614 615 /* We only have 40 - 23 bits of seg_off in avpn */ 616 offset = (avpn & 0x1ffff) << 23; 617 vsid = avpn >> 17; 618 if (base_pg_shift < 23) { 619 offset |= ((vsid ^ (vsid << 25) ^ pteg) & old_hash_mask) 620 << base_pg_shift; 621 } 622 623 hash = vsid ^ (vsid << 25) ^ (offset >> base_pg_shift); 624 } else { 625 error_report("rehash_pte: Bad segment size in HPTE"); 626 return H_HARDWARE; 627 } 628 629 new_pteg = hash & new_hash_mask; 630 if (pte0 & HPTE64_V_SECONDARY) { 631 assert(~pteg == (hash & old_hash_mask)); 632 new_pteg = ~new_pteg; 633 } else { 634 assert(pteg == (hash & old_hash_mask)); 635 } 636 assert((oldsize != newsize) || (pteg == new_pteg)); 637 replace_pte0 = new_hpte_load0(new_hpt, new_pteg, slot); 638 /* 639 * Strictly speaking, we don't need all these tests, since we only 640 * ever rehash bolted HPTEs. We might in future handle non-bolted 641 * HPTEs, though so make the logic correct for those cases as 642 * well. 643 */ 644 if (replace_pte0 & HPTE64_V_VALID) { 645 assert(newsize < oldsize); 646 if (replace_pte0 & HPTE64_V_BOLTED) { 647 if (pte0 & HPTE64_V_BOLTED) { 648 /* Bolted collision, nothing we can do */ 649 return H_PTEG_FULL; 650 } else { 651 /* Discard this hpte */ 652 return H_SUCCESS; 653 } 654 } 655 } 656 657 new_hpte_store(new_hpt, new_pteg, slot, pte0, pte1); 658 return H_SUCCESS; 659 } 660 661 static int rehash_hpt(PowerPCCPU *cpu, 662 void *old_hpt, uint64_t oldsize, 663 void *new_hpt, uint64_t newsize) 664 { 665 uint64_t n_ptegs = oldsize >> 7; 666 uint64_t pteg; 667 int slot; 668 int rc; 669 670 for (pteg = 0; pteg < n_ptegs; pteg++) { 671 hwaddr ptex = pteg * HPTES_PER_GROUP; 672 const ppc_hash_pte64_t *hptes 673 = ppc_hash64_map_hptes(cpu, ptex, HPTES_PER_GROUP); 674 675 if (!hptes) { 676 return H_HARDWARE; 677 } 678 679 for (slot = 0; slot < HPTES_PER_GROUP; slot++) { 680 rc = rehash_hpte(cpu, hptes, old_hpt, oldsize, new_hpt, newsize, 681 pteg, slot); 682 if (rc != H_SUCCESS) { 683 ppc_hash64_unmap_hptes(cpu, hptes, ptex, HPTES_PER_GROUP); 684 return rc; 685 } 686 } 687 ppc_hash64_unmap_hptes(cpu, hptes, ptex, HPTES_PER_GROUP); 688 } 689 690 return H_SUCCESS; 691 } 692 693 static void do_push_sregs_to_kvm_pr(CPUState *cs, run_on_cpu_data data) 694 { 695 int ret; 696 697 cpu_synchronize_state(cs); 698 699 ret = kvmppc_put_books_sregs(POWERPC_CPU(cs)); 700 if (ret < 0) { 701 error_report("failed to push sregs to KVM: %s", strerror(-ret)); 702 exit(1); 703 } 704 } 705 706 static void push_sregs_to_kvm_pr(sPAPRMachineState *spapr) 707 { 708 CPUState *cs; 709 710 /* 711 * This is a hack for the benefit of KVM PR - it abuses the SDR1 712 * slot in kvm_sregs to communicate the userspace address of the 713 * HPT 714 */ 715 if (!kvm_enabled() || !spapr->htab) { 716 return; 717 } 718 719 CPU_FOREACH(cs) { 720 run_on_cpu(cs, do_push_sregs_to_kvm_pr, RUN_ON_CPU_NULL); 721 } 722 } 723 724 static target_ulong h_resize_hpt_commit(PowerPCCPU *cpu, 725 sPAPRMachineState *spapr, 726 target_ulong opcode, 727 target_ulong *args) 728 { 729 target_ulong flags = args[0]; 730 target_ulong shift = args[1]; 731 sPAPRPendingHPT *pending = spapr->pending_hpt; 732 int rc; 733 size_t newsize; 734 735 if (spapr->resize_hpt == SPAPR_RESIZE_HPT_DISABLED) { 736 return H_AUTHORITY; 737 } 738 739 if (!spapr->htab_shift) { 740 /* Radix guest, no HPT */ 741 return H_NOT_AVAILABLE; 742 } 743 744 trace_spapr_h_resize_hpt_commit(flags, shift); 745 746 rc = kvmppc_resize_hpt_commit(cpu, flags, shift); 747 if (rc != -ENOSYS) { 748 rc = resize_hpt_convert_rc(rc); 749 if (rc == H_SUCCESS) { 750 /* Need to set the new htab_shift in the machine state */ 751 spapr->htab_shift = shift; 752 } 753 return rc; 754 } 755 756 if (flags != 0) { 757 return H_PARAMETER; 758 } 759 760 if (!pending || (pending->shift != shift)) { 761 /* no matching prepare */ 762 return H_CLOSED; 763 } 764 765 if (!pending->complete) { 766 /* prepare has not completed */ 767 return H_BUSY; 768 } 769 770 /* Shouldn't have got past PREPARE without an HPT */ 771 g_assert(spapr->htab_shift); 772 773 newsize = 1ULL << pending->shift; 774 rc = rehash_hpt(cpu, spapr->htab, HTAB_SIZE(spapr), 775 pending->hpt, newsize); 776 if (rc == H_SUCCESS) { 777 qemu_vfree(spapr->htab); 778 spapr->htab = pending->hpt; 779 spapr->htab_shift = pending->shift; 780 781 push_sregs_to_kvm_pr(spapr); 782 783 pending->hpt = NULL; /* so it's not free()d */ 784 } 785 786 /* Clean up */ 787 spapr->pending_hpt = NULL; 788 free_pending_hpt(pending); 789 790 return rc; 791 } 792 793 static target_ulong h_set_sprg0(PowerPCCPU *cpu, sPAPRMachineState *spapr, 794 target_ulong opcode, target_ulong *args) 795 { 796 cpu_synchronize_state(CPU(cpu)); 797 cpu->env.spr[SPR_SPRG0] = args[0]; 798 799 return H_SUCCESS; 800 } 801 802 static target_ulong h_set_dabr(PowerPCCPU *cpu, sPAPRMachineState *spapr, 803 target_ulong opcode, target_ulong *args) 804 { 805 if (!has_spr(cpu, SPR_DABR)) { 806 return H_HARDWARE; /* DABR register not available */ 807 } 808 cpu_synchronize_state(CPU(cpu)); 809 810 if (has_spr(cpu, SPR_DABRX)) { 811 cpu->env.spr[SPR_DABRX] = 0x3; /* Use Problem and Privileged state */ 812 } else if (!(args[0] & 0x4)) { /* Breakpoint Translation set? */ 813 return H_RESERVED_DABR; 814 } 815 816 cpu->env.spr[SPR_DABR] = args[0]; 817 return H_SUCCESS; 818 } 819 820 static target_ulong h_set_xdabr(PowerPCCPU *cpu, sPAPRMachineState *spapr, 821 target_ulong opcode, target_ulong *args) 822 { 823 target_ulong dabrx = args[1]; 824 825 if (!has_spr(cpu, SPR_DABR) || !has_spr(cpu, SPR_DABRX)) { 826 return H_HARDWARE; 827 } 828 829 if ((dabrx & ~0xfULL) != 0 || (dabrx & H_DABRX_HYPERVISOR) != 0 830 || (dabrx & (H_DABRX_KERNEL | H_DABRX_USER)) == 0) { 831 return H_PARAMETER; 832 } 833 834 cpu_synchronize_state(CPU(cpu)); 835 cpu->env.spr[SPR_DABRX] = dabrx; 836 cpu->env.spr[SPR_DABR] = args[0]; 837 838 return H_SUCCESS; 839 } 840 841 static target_ulong h_page_init(PowerPCCPU *cpu, sPAPRMachineState *spapr, 842 target_ulong opcode, target_ulong *args) 843 { 844 target_ulong flags = args[0]; 845 hwaddr dst = args[1]; 846 hwaddr src = args[2]; 847 hwaddr len = TARGET_PAGE_SIZE; 848 uint8_t *pdst, *psrc; 849 target_long ret = H_SUCCESS; 850 851 if (flags & ~(H_ICACHE_SYNCHRONIZE | H_ICACHE_INVALIDATE 852 | H_COPY_PAGE | H_ZERO_PAGE)) { 853 qemu_log_mask(LOG_UNIMP, "h_page_init: Bad flags (" TARGET_FMT_lx "\n", 854 flags); 855 return H_PARAMETER; 856 } 857 858 /* Map-in destination */ 859 if (!is_ram_address(spapr, dst) || (dst & ~TARGET_PAGE_MASK) != 0) { 860 return H_PARAMETER; 861 } 862 pdst = cpu_physical_memory_map(dst, &len, 1); 863 if (!pdst || len != TARGET_PAGE_SIZE) { 864 return H_PARAMETER; 865 } 866 867 if (flags & H_COPY_PAGE) { 868 /* Map-in source, copy to destination, and unmap source again */ 869 if (!is_ram_address(spapr, src) || (src & ~TARGET_PAGE_MASK) != 0) { 870 ret = H_PARAMETER; 871 goto unmap_out; 872 } 873 psrc = cpu_physical_memory_map(src, &len, 0); 874 if (!psrc || len != TARGET_PAGE_SIZE) { 875 ret = H_PARAMETER; 876 goto unmap_out; 877 } 878 memcpy(pdst, psrc, len); 879 cpu_physical_memory_unmap(psrc, len, 0, len); 880 } else if (flags & H_ZERO_PAGE) { 881 memset(pdst, 0, len); /* Just clear the destination page */ 882 } 883 884 if (kvm_enabled() && (flags & H_ICACHE_SYNCHRONIZE) != 0) { 885 kvmppc_dcbst_range(cpu, pdst, len); 886 } 887 if (flags & (H_ICACHE_SYNCHRONIZE | H_ICACHE_INVALIDATE)) { 888 if (kvm_enabled()) { 889 kvmppc_icbi_range(cpu, pdst, len); 890 } else { 891 tb_flush(CPU(cpu)); 892 } 893 } 894 895 unmap_out: 896 cpu_physical_memory_unmap(pdst, TARGET_PAGE_SIZE, 1, len); 897 return ret; 898 } 899 900 #define FLAGS_REGISTER_VPA 0x0000200000000000ULL 901 #define FLAGS_REGISTER_DTL 0x0000400000000000ULL 902 #define FLAGS_REGISTER_SLBSHADOW 0x0000600000000000ULL 903 #define FLAGS_DEREGISTER_VPA 0x0000a00000000000ULL 904 #define FLAGS_DEREGISTER_DTL 0x0000c00000000000ULL 905 #define FLAGS_DEREGISTER_SLBSHADOW 0x0000e00000000000ULL 906 907 #define VPA_MIN_SIZE 640 908 #define VPA_SIZE_OFFSET 0x4 909 #define VPA_SHARED_PROC_OFFSET 0x9 910 #define VPA_SHARED_PROC_VAL 0x2 911 912 static target_ulong register_vpa(PowerPCCPU *cpu, target_ulong vpa) 913 { 914 CPUState *cs = CPU(cpu); 915 CPUPPCState *env = &cpu->env; 916 sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu); 917 uint16_t size; 918 uint8_t tmp; 919 920 if (vpa == 0) { 921 hcall_dprintf("Can't cope with registering a VPA at logical 0\n"); 922 return H_HARDWARE; 923 } 924 925 if (vpa % env->dcache_line_size) { 926 return H_PARAMETER; 927 } 928 /* FIXME: bounds check the address */ 929 930 size = lduw_be_phys(cs->as, vpa + 0x4); 931 932 if (size < VPA_MIN_SIZE) { 933 return H_PARAMETER; 934 } 935 936 /* VPA is not allowed to cross a page boundary */ 937 if ((vpa / 4096) != ((vpa + size - 1) / 4096)) { 938 return H_PARAMETER; 939 } 940 941 spapr_cpu->vpa_addr = vpa; 942 943 tmp = ldub_phys(cs->as, spapr_cpu->vpa_addr + VPA_SHARED_PROC_OFFSET); 944 tmp |= VPA_SHARED_PROC_VAL; 945 stb_phys(cs->as, spapr_cpu->vpa_addr + VPA_SHARED_PROC_OFFSET, tmp); 946 947 return H_SUCCESS; 948 } 949 950 static target_ulong deregister_vpa(PowerPCCPU *cpu, target_ulong vpa) 951 { 952 sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu); 953 954 if (spapr_cpu->slb_shadow_addr) { 955 return H_RESOURCE; 956 } 957 958 if (spapr_cpu->dtl_addr) { 959 return H_RESOURCE; 960 } 961 962 spapr_cpu->vpa_addr = 0; 963 return H_SUCCESS; 964 } 965 966 static target_ulong register_slb_shadow(PowerPCCPU *cpu, target_ulong addr) 967 { 968 sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu); 969 uint32_t size; 970 971 if (addr == 0) { 972 hcall_dprintf("Can't cope with SLB shadow at logical 0\n"); 973 return H_HARDWARE; 974 } 975 976 size = ldl_be_phys(CPU(cpu)->as, addr + 0x4); 977 if (size < 0x8) { 978 return H_PARAMETER; 979 } 980 981 if ((addr / 4096) != ((addr + size - 1) / 4096)) { 982 return H_PARAMETER; 983 } 984 985 if (!spapr_cpu->vpa_addr) { 986 return H_RESOURCE; 987 } 988 989 spapr_cpu->slb_shadow_addr = addr; 990 spapr_cpu->slb_shadow_size = size; 991 992 return H_SUCCESS; 993 } 994 995 static target_ulong deregister_slb_shadow(PowerPCCPU *cpu, target_ulong addr) 996 { 997 sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu); 998 999 spapr_cpu->slb_shadow_addr = 0; 1000 spapr_cpu->slb_shadow_size = 0; 1001 return H_SUCCESS; 1002 } 1003 1004 static target_ulong register_dtl(PowerPCCPU *cpu, target_ulong addr) 1005 { 1006 sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu); 1007 uint32_t size; 1008 1009 if (addr == 0) { 1010 hcall_dprintf("Can't cope with DTL at logical 0\n"); 1011 return H_HARDWARE; 1012 } 1013 1014 size = ldl_be_phys(CPU(cpu)->as, addr + 0x4); 1015 1016 if (size < 48) { 1017 return H_PARAMETER; 1018 } 1019 1020 if (!spapr_cpu->vpa_addr) { 1021 return H_RESOURCE; 1022 } 1023 1024 spapr_cpu->dtl_addr = addr; 1025 spapr_cpu->dtl_size = size; 1026 1027 return H_SUCCESS; 1028 } 1029 1030 static target_ulong deregister_dtl(PowerPCCPU *cpu, target_ulong addr) 1031 { 1032 sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu); 1033 1034 spapr_cpu->dtl_addr = 0; 1035 spapr_cpu->dtl_size = 0; 1036 1037 return H_SUCCESS; 1038 } 1039 1040 static target_ulong h_register_vpa(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1041 target_ulong opcode, target_ulong *args) 1042 { 1043 target_ulong flags = args[0]; 1044 target_ulong procno = args[1]; 1045 target_ulong vpa = args[2]; 1046 target_ulong ret = H_PARAMETER; 1047 PowerPCCPU *tcpu; 1048 1049 tcpu = spapr_find_cpu(procno); 1050 if (!tcpu) { 1051 return H_PARAMETER; 1052 } 1053 1054 switch (flags) { 1055 case FLAGS_REGISTER_VPA: 1056 ret = register_vpa(tcpu, vpa); 1057 break; 1058 1059 case FLAGS_DEREGISTER_VPA: 1060 ret = deregister_vpa(tcpu, vpa); 1061 break; 1062 1063 case FLAGS_REGISTER_SLBSHADOW: 1064 ret = register_slb_shadow(tcpu, vpa); 1065 break; 1066 1067 case FLAGS_DEREGISTER_SLBSHADOW: 1068 ret = deregister_slb_shadow(tcpu, vpa); 1069 break; 1070 1071 case FLAGS_REGISTER_DTL: 1072 ret = register_dtl(tcpu, vpa); 1073 break; 1074 1075 case FLAGS_DEREGISTER_DTL: 1076 ret = deregister_dtl(tcpu, vpa); 1077 break; 1078 } 1079 1080 return ret; 1081 } 1082 1083 static target_ulong h_cede(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1084 target_ulong opcode, target_ulong *args) 1085 { 1086 CPUPPCState *env = &cpu->env; 1087 CPUState *cs = CPU(cpu); 1088 1089 env->msr |= (1ULL << MSR_EE); 1090 hreg_compute_hflags(env); 1091 if (!cpu_has_work(cs)) { 1092 cs->halted = 1; 1093 cs->exception_index = EXCP_HLT; 1094 cs->exit_request = 1; 1095 } 1096 return H_SUCCESS; 1097 } 1098 1099 static target_ulong h_rtas(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1100 target_ulong opcode, target_ulong *args) 1101 { 1102 target_ulong rtas_r3 = args[0]; 1103 uint32_t token = rtas_ld(rtas_r3, 0); 1104 uint32_t nargs = rtas_ld(rtas_r3, 1); 1105 uint32_t nret = rtas_ld(rtas_r3, 2); 1106 1107 return spapr_rtas_call(cpu, spapr, token, nargs, rtas_r3 + 12, 1108 nret, rtas_r3 + 12 + 4*nargs); 1109 } 1110 1111 static target_ulong h_logical_load(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1112 target_ulong opcode, target_ulong *args) 1113 { 1114 CPUState *cs = CPU(cpu); 1115 target_ulong size = args[0]; 1116 target_ulong addr = args[1]; 1117 1118 switch (size) { 1119 case 1: 1120 args[0] = ldub_phys(cs->as, addr); 1121 return H_SUCCESS; 1122 case 2: 1123 args[0] = lduw_phys(cs->as, addr); 1124 return H_SUCCESS; 1125 case 4: 1126 args[0] = ldl_phys(cs->as, addr); 1127 return H_SUCCESS; 1128 case 8: 1129 args[0] = ldq_phys(cs->as, addr); 1130 return H_SUCCESS; 1131 } 1132 return H_PARAMETER; 1133 } 1134 1135 static target_ulong h_logical_store(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1136 target_ulong opcode, target_ulong *args) 1137 { 1138 CPUState *cs = CPU(cpu); 1139 1140 target_ulong size = args[0]; 1141 target_ulong addr = args[1]; 1142 target_ulong val = args[2]; 1143 1144 switch (size) { 1145 case 1: 1146 stb_phys(cs->as, addr, val); 1147 return H_SUCCESS; 1148 case 2: 1149 stw_phys(cs->as, addr, val); 1150 return H_SUCCESS; 1151 case 4: 1152 stl_phys(cs->as, addr, val); 1153 return H_SUCCESS; 1154 case 8: 1155 stq_phys(cs->as, addr, val); 1156 return H_SUCCESS; 1157 } 1158 return H_PARAMETER; 1159 } 1160 1161 static target_ulong h_logical_memop(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1162 target_ulong opcode, target_ulong *args) 1163 { 1164 CPUState *cs = CPU(cpu); 1165 1166 target_ulong dst = args[0]; /* Destination address */ 1167 target_ulong src = args[1]; /* Source address */ 1168 target_ulong esize = args[2]; /* Element size (0=1,1=2,2=4,3=8) */ 1169 target_ulong count = args[3]; /* Element count */ 1170 target_ulong op = args[4]; /* 0 = copy, 1 = invert */ 1171 uint64_t tmp; 1172 unsigned int mask = (1 << esize) - 1; 1173 int step = 1 << esize; 1174 1175 if (count > 0x80000000) { 1176 return H_PARAMETER; 1177 } 1178 1179 if ((dst & mask) || (src & mask) || (op > 1)) { 1180 return H_PARAMETER; 1181 } 1182 1183 if (dst >= src && dst < (src + (count << esize))) { 1184 dst = dst + ((count - 1) << esize); 1185 src = src + ((count - 1) << esize); 1186 step = -step; 1187 } 1188 1189 while (count--) { 1190 switch (esize) { 1191 case 0: 1192 tmp = ldub_phys(cs->as, src); 1193 break; 1194 case 1: 1195 tmp = lduw_phys(cs->as, src); 1196 break; 1197 case 2: 1198 tmp = ldl_phys(cs->as, src); 1199 break; 1200 case 3: 1201 tmp = ldq_phys(cs->as, src); 1202 break; 1203 default: 1204 return H_PARAMETER; 1205 } 1206 if (op == 1) { 1207 tmp = ~tmp; 1208 } 1209 switch (esize) { 1210 case 0: 1211 stb_phys(cs->as, dst, tmp); 1212 break; 1213 case 1: 1214 stw_phys(cs->as, dst, tmp); 1215 break; 1216 case 2: 1217 stl_phys(cs->as, dst, tmp); 1218 break; 1219 case 3: 1220 stq_phys(cs->as, dst, tmp); 1221 break; 1222 } 1223 dst = dst + step; 1224 src = src + step; 1225 } 1226 1227 return H_SUCCESS; 1228 } 1229 1230 static target_ulong h_logical_icbi(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1231 target_ulong opcode, target_ulong *args) 1232 { 1233 /* Nothing to do on emulation, KVM will trap this in the kernel */ 1234 return H_SUCCESS; 1235 } 1236 1237 static target_ulong h_logical_dcbf(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1238 target_ulong opcode, target_ulong *args) 1239 { 1240 /* Nothing to do on emulation, KVM will trap this in the kernel */ 1241 return H_SUCCESS; 1242 } 1243 1244 static target_ulong h_set_mode_resource_le(PowerPCCPU *cpu, 1245 target_ulong mflags, 1246 target_ulong value1, 1247 target_ulong value2) 1248 { 1249 if (value1) { 1250 return H_P3; 1251 } 1252 if (value2) { 1253 return H_P4; 1254 } 1255 1256 switch (mflags) { 1257 case H_SET_MODE_ENDIAN_BIG: 1258 set_all_lpcrs(0, LPCR_ILE); 1259 spapr_pci_switch_vga(true); 1260 return H_SUCCESS; 1261 1262 case H_SET_MODE_ENDIAN_LITTLE: 1263 set_all_lpcrs(LPCR_ILE, LPCR_ILE); 1264 spapr_pci_switch_vga(false); 1265 return H_SUCCESS; 1266 } 1267 1268 return H_UNSUPPORTED_FLAG; 1269 } 1270 1271 static target_ulong h_set_mode_resource_addr_trans_mode(PowerPCCPU *cpu, 1272 target_ulong mflags, 1273 target_ulong value1, 1274 target_ulong value2) 1275 { 1276 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 1277 1278 if (!(pcc->insns_flags2 & PPC2_ISA207S)) { 1279 return H_P2; 1280 } 1281 if (value1) { 1282 return H_P3; 1283 } 1284 if (value2) { 1285 return H_P4; 1286 } 1287 1288 if (mflags == AIL_RESERVED) { 1289 return H_UNSUPPORTED_FLAG; 1290 } 1291 1292 set_all_lpcrs(mflags << LPCR_AIL_SHIFT, LPCR_AIL); 1293 1294 return H_SUCCESS; 1295 } 1296 1297 static target_ulong h_set_mode(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1298 target_ulong opcode, target_ulong *args) 1299 { 1300 target_ulong resource = args[1]; 1301 target_ulong ret = H_P2; 1302 1303 switch (resource) { 1304 case H_SET_MODE_RESOURCE_LE: 1305 ret = h_set_mode_resource_le(cpu, args[0], args[2], args[3]); 1306 break; 1307 case H_SET_MODE_RESOURCE_ADDR_TRANS_MODE: 1308 ret = h_set_mode_resource_addr_trans_mode(cpu, args[0], 1309 args[2], args[3]); 1310 break; 1311 } 1312 1313 return ret; 1314 } 1315 1316 static target_ulong h_clean_slb(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1317 target_ulong opcode, target_ulong *args) 1318 { 1319 qemu_log_mask(LOG_UNIMP, "Unimplemented SPAPR hcall 0x"TARGET_FMT_lx"%s\n", 1320 opcode, " (H_CLEAN_SLB)"); 1321 return H_FUNCTION; 1322 } 1323 1324 static target_ulong h_invalidate_pid(PowerPCCPU *cpu, sPAPRMachineState *spapr, 1325 target_ulong opcode, target_ulong *args) 1326 { 1327 qemu_log_mask(LOG_UNIMP, "Unimplemented SPAPR hcall 0x"TARGET_FMT_lx"%s\n", 1328 opcode, " (H_INVALIDATE_PID)"); 1329 return H_FUNCTION; 1330 } 1331 1332 static void spapr_check_setup_free_hpt(sPAPRMachineState *spapr, 1333 uint64_t patbe_old, uint64_t patbe_new) 1334 { 1335 /* 1336 * We have 4 Options: 1337 * HASH->HASH || RADIX->RADIX || NOTHING->RADIX : Do Nothing 1338 * HASH->RADIX : Free HPT 1339 * RADIX->HASH : Allocate HPT 1340 * NOTHING->HASH : Allocate HPT 1341 * Note: NOTHING implies the case where we said the guest could choose 1342 * later and so assumed radix and now it's called H_REG_PROC_TBL 1343 */ 1344 1345 if ((patbe_old & PATBE1_GR) == (patbe_new & PATBE1_GR)) { 1346 /* We assume RADIX, so this catches all the "Do Nothing" cases */ 1347 } else if (!(patbe_old & PATBE1_GR)) { 1348 /* HASH->RADIX : Free HPT */ 1349 spapr_free_hpt(spapr); 1350 } else if (!(patbe_new & PATBE1_GR)) { 1351 /* RADIX->HASH || NOTHING->HASH : Allocate HPT */ 1352 spapr_setup_hpt_and_vrma(spapr); 1353 } 1354 return; 1355 } 1356 1357 #define FLAGS_MASK 0x01FULL 1358 #define FLAG_MODIFY 0x10 1359 #define FLAG_REGISTER 0x08 1360 #define FLAG_RADIX 0x04 1361 #define FLAG_HASH_PROC_TBL 0x02 1362 #define FLAG_GTSE 0x01 1363 1364 static target_ulong h_register_process_table(PowerPCCPU *cpu, 1365 sPAPRMachineState *spapr, 1366 target_ulong opcode, 1367 target_ulong *args) 1368 { 1369 target_ulong flags = args[0]; 1370 target_ulong proc_tbl = args[1]; 1371 target_ulong page_size = args[2]; 1372 target_ulong table_size = args[3]; 1373 uint64_t cproc; 1374 1375 if (flags & ~FLAGS_MASK) { /* Check no reserved bits are set */ 1376 return H_PARAMETER; 1377 } 1378 if (flags & FLAG_MODIFY) { 1379 if (flags & FLAG_REGISTER) { 1380 if (flags & FLAG_RADIX) { /* Register new RADIX process table */ 1381 if (proc_tbl & 0xfff || proc_tbl >> 60) { 1382 return H_P2; 1383 } else if (page_size) { 1384 return H_P3; 1385 } else if (table_size > 24) { 1386 return H_P4; 1387 } 1388 cproc = PATBE1_GR | proc_tbl | table_size; 1389 } else { /* Register new HPT process table */ 1390 if (flags & FLAG_HASH_PROC_TBL) { /* Hash with Segment Tables */ 1391 /* TODO - Not Supported */ 1392 /* Technically caused by flag bits => H_PARAMETER */ 1393 return H_PARAMETER; 1394 } else { /* Hash with SLB */ 1395 if (proc_tbl >> 38) { 1396 return H_P2; 1397 } else if (page_size & ~0x7) { 1398 return H_P3; 1399 } else if (table_size > 24) { 1400 return H_P4; 1401 } 1402 } 1403 cproc = (proc_tbl << 25) | page_size << 5 | table_size; 1404 } 1405 1406 } else { /* Deregister current process table */ 1407 /* Set to benign value: (current GR) | 0. This allows 1408 * deregistration in KVM to succeed even if the radix bit in flags 1409 * doesn't match the radix bit in the old PATB. */ 1410 cproc = spapr->patb_entry & PATBE1_GR; 1411 } 1412 } else { /* Maintain current registration */ 1413 if (!(flags & FLAG_RADIX) != !(spapr->patb_entry & PATBE1_GR)) { 1414 /* Technically caused by flag bits => H_PARAMETER */ 1415 return H_PARAMETER; /* Existing Process Table Mismatch */ 1416 } 1417 cproc = spapr->patb_entry; 1418 } 1419 1420 /* Check if we need to setup OR free the hpt */ 1421 spapr_check_setup_free_hpt(spapr, spapr->patb_entry, cproc); 1422 1423 spapr->patb_entry = cproc; /* Save new process table */ 1424 1425 /* Update the UPRT and GTSE bits in the LPCR for all cpus */ 1426 set_all_lpcrs(((flags & (FLAG_RADIX | FLAG_HASH_PROC_TBL)) ? LPCR_UPRT : 0) | 1427 ((flags & FLAG_GTSE) ? LPCR_GTSE : 0), 1428 LPCR_UPRT | LPCR_GTSE); 1429 1430 if (kvm_enabled()) { 1431 return kvmppc_configure_v3_mmu(cpu, flags & FLAG_RADIX, 1432 flags & FLAG_GTSE, cproc); 1433 } 1434 return H_SUCCESS; 1435 } 1436 1437 #define H_SIGNAL_SYS_RESET_ALL -1 1438 #define H_SIGNAL_SYS_RESET_ALLBUTSELF -2 1439 1440 static target_ulong h_signal_sys_reset(PowerPCCPU *cpu, 1441 sPAPRMachineState *spapr, 1442 target_ulong opcode, target_ulong *args) 1443 { 1444 target_long target = args[0]; 1445 CPUState *cs; 1446 1447 if (target < 0) { 1448 /* Broadcast */ 1449 if (target < H_SIGNAL_SYS_RESET_ALLBUTSELF) { 1450 return H_PARAMETER; 1451 } 1452 1453 CPU_FOREACH(cs) { 1454 PowerPCCPU *c = POWERPC_CPU(cs); 1455 1456 if (target == H_SIGNAL_SYS_RESET_ALLBUTSELF) { 1457 if (c == cpu) { 1458 continue; 1459 } 1460 } 1461 run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL); 1462 } 1463 return H_SUCCESS; 1464 1465 } else { 1466 /* Unicast */ 1467 cs = CPU(spapr_find_cpu(target)); 1468 if (cs) { 1469 run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL); 1470 return H_SUCCESS; 1471 } 1472 return H_PARAMETER; 1473 } 1474 } 1475 1476 static uint32_t cas_check_pvr(sPAPRMachineState *spapr, PowerPCCPU *cpu, 1477 target_ulong *addr, bool *raw_mode_supported, 1478 Error **errp) 1479 { 1480 bool explicit_match = false; /* Matched the CPU's real PVR */ 1481 uint32_t max_compat = spapr->max_compat_pvr; 1482 uint32_t best_compat = 0; 1483 int i; 1484 1485 /* 1486 * We scan the supplied table of PVRs looking for two things 1487 * 1. Is our real CPU PVR in the list? 1488 * 2. What's the "best" listed logical PVR 1489 */ 1490 for (i = 0; i < 512; ++i) { 1491 uint32_t pvr, pvr_mask; 1492 1493 pvr_mask = ldl_be_phys(&address_space_memory, *addr); 1494 pvr = ldl_be_phys(&address_space_memory, *addr + 4); 1495 *addr += 8; 1496 1497 if (~pvr_mask & pvr) { 1498 break; /* Terminator record */ 1499 } 1500 1501 if ((cpu->env.spr[SPR_PVR] & pvr_mask) == (pvr & pvr_mask)) { 1502 explicit_match = true; 1503 } else { 1504 if (ppc_check_compat(cpu, pvr, best_compat, max_compat)) { 1505 best_compat = pvr; 1506 } 1507 } 1508 } 1509 1510 if ((best_compat == 0) && (!explicit_match || max_compat)) { 1511 /* We couldn't find a suitable compatibility mode, and either 1512 * the guest doesn't support "raw" mode for this CPU, or raw 1513 * mode is disabled because a maximum compat mode is set */ 1514 error_setg(errp, "Couldn't negotiate a suitable PVR during CAS"); 1515 return 0; 1516 } 1517 1518 *raw_mode_supported = explicit_match; 1519 1520 /* Parsing finished */ 1521 trace_spapr_cas_pvr(cpu->compat_pvr, explicit_match, best_compat); 1522 1523 return best_compat; 1524 } 1525 1526 static target_ulong h_client_architecture_support(PowerPCCPU *cpu, 1527 sPAPRMachineState *spapr, 1528 target_ulong opcode, 1529 target_ulong *args) 1530 { 1531 /* Working address in data buffer */ 1532 target_ulong addr = ppc64_phys_to_real(args[0]); 1533 target_ulong ov_table; 1534 uint32_t cas_pvr; 1535 sPAPROptionVector *ov1_guest, *ov5_guest, *ov5_cas_old, *ov5_updates; 1536 bool guest_radix; 1537 Error *local_err = NULL; 1538 bool raw_mode_supported = false; 1539 1540 cas_pvr = cas_check_pvr(spapr, cpu, &addr, &raw_mode_supported, &local_err); 1541 if (local_err) { 1542 error_report_err(local_err); 1543 return H_HARDWARE; 1544 } 1545 1546 /* Update CPUs */ 1547 if (cpu->compat_pvr != cas_pvr) { 1548 ppc_set_compat_all(cas_pvr, &local_err); 1549 if (local_err) { 1550 /* We fail to set compat mode (likely because running with KVM PR), 1551 * but maybe we can fallback to raw mode if the guest supports it. 1552 */ 1553 if (!raw_mode_supported) { 1554 error_report_err(local_err); 1555 return H_HARDWARE; 1556 } 1557 error_free(local_err); 1558 local_err = NULL; 1559 } 1560 } 1561 1562 /* For the future use: here @ov_table points to the first option vector */ 1563 ov_table = addr; 1564 1565 ov1_guest = spapr_ovec_parse_vector(ov_table, 1); 1566 ov5_guest = spapr_ovec_parse_vector(ov_table, 5); 1567 if (spapr_ovec_test(ov5_guest, OV5_MMU_BOTH)) { 1568 error_report("guest requested hash and radix MMU, which is invalid."); 1569 exit(EXIT_FAILURE); 1570 } 1571 /* The radix/hash bit in byte 24 requires special handling: */ 1572 guest_radix = spapr_ovec_test(ov5_guest, OV5_MMU_RADIX_300); 1573 spapr_ovec_clear(ov5_guest, OV5_MMU_RADIX_300); 1574 1575 /* 1576 * HPT resizing is a bit of a special case, because when enabled 1577 * we assume an HPT guest will support it until it says it 1578 * doesn't, instead of assuming it won't support it until it says 1579 * it does. Strictly speaking that approach could break for 1580 * guests which don't make a CAS call, but those are so old we 1581 * don't care about them. Without that assumption we'd have to 1582 * make at least a temporary allocation of an HPT sized for max 1583 * memory, which could be impossibly difficult under KVM HV if 1584 * maxram is large. 1585 */ 1586 if (!guest_radix && !spapr_ovec_test(ov5_guest, OV5_HPT_RESIZE)) { 1587 int maxshift = spapr_hpt_shift_for_ramsize(MACHINE(spapr)->maxram_size); 1588 1589 if (spapr->resize_hpt == SPAPR_RESIZE_HPT_REQUIRED) { 1590 error_report( 1591 "h_client_architecture_support: Guest doesn't support HPT resizing, but resize-hpt=required"); 1592 exit(1); 1593 } 1594 1595 if (spapr->htab_shift < maxshift) { 1596 /* Guest doesn't know about HPT resizing, so we 1597 * pre-emptively resize for the maximum permitted RAM. At 1598 * the point this is called, nothing should have been 1599 * entered into the existing HPT */ 1600 spapr_reallocate_hpt(spapr, maxshift, &error_fatal); 1601 push_sregs_to_kvm_pr(spapr); 1602 } 1603 } 1604 1605 /* NOTE: there are actually a number of ov5 bits where input from the 1606 * guest is always zero, and the platform/QEMU enables them independently 1607 * of guest input. To model these properly we'd want some sort of mask, 1608 * but since they only currently apply to memory migration as defined 1609 * by LoPAPR 1.1, 14.5.4.8, which QEMU doesn't implement, we don't need 1610 * to worry about this for now. 1611 */ 1612 ov5_cas_old = spapr_ovec_clone(spapr->ov5_cas); 1613 1614 /* also clear the radix/hash bit from the current ov5_cas bits to 1615 * be in sync with the newly ov5 bits. Else the radix bit will be 1616 * seen as being removed and this will generate a reset loop 1617 */ 1618 spapr_ovec_clear(ov5_cas_old, OV5_MMU_RADIX_300); 1619 1620 /* full range of negotiated ov5 capabilities */ 1621 spapr_ovec_intersect(spapr->ov5_cas, spapr->ov5, ov5_guest); 1622 spapr_ovec_cleanup(ov5_guest); 1623 /* capabilities that have been added since CAS-generated guest reset. 1624 * if capabilities have since been removed, generate another reset 1625 */ 1626 ov5_updates = spapr_ovec_new(); 1627 spapr->cas_reboot = spapr_ovec_diff(ov5_updates, 1628 ov5_cas_old, spapr->ov5_cas); 1629 /* Now that processing is finished, set the radix/hash bit for the 1630 * guest if it requested a valid mode; otherwise terminate the boot. */ 1631 if (guest_radix) { 1632 if (kvm_enabled() && !kvmppc_has_cap_mmu_radix()) { 1633 error_report("Guest requested unavailable MMU mode (radix)."); 1634 exit(EXIT_FAILURE); 1635 } 1636 spapr_ovec_set(spapr->ov5_cas, OV5_MMU_RADIX_300); 1637 } else { 1638 if (kvm_enabled() && kvmppc_has_cap_mmu_radix() 1639 && !kvmppc_has_cap_mmu_hash_v3()) { 1640 error_report("Guest requested unavailable MMU mode (hash)."); 1641 exit(EXIT_FAILURE); 1642 } 1643 } 1644 spapr->cas_legacy_guest_workaround = !spapr_ovec_test(ov1_guest, 1645 OV1_PPC_3_00); 1646 if (!spapr->cas_reboot) { 1647 /* If spapr_machine_reset() did not set up a HPT but one is necessary 1648 * (because the guest isn't going to use radix) then set it up here. */ 1649 if ((spapr->patb_entry & PATBE1_GR) && !guest_radix) { 1650 /* legacy hash or new hash: */ 1651 spapr_setup_hpt_and_vrma(spapr); 1652 } 1653 spapr->cas_reboot = 1654 (spapr_h_cas_compose_response(spapr, args[1], args[2], 1655 ov5_updates) != 0); 1656 } 1657 spapr_ovec_cleanup(ov5_updates); 1658 1659 if (spapr->cas_reboot) { 1660 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 1661 } 1662 1663 return H_SUCCESS; 1664 } 1665 1666 static target_ulong h_get_cpu_characteristics(PowerPCCPU *cpu, 1667 sPAPRMachineState *spapr, 1668 target_ulong opcode, 1669 target_ulong *args) 1670 { 1671 uint64_t characteristics = H_CPU_CHAR_HON_BRANCH_HINTS & 1672 ~H_CPU_CHAR_THR_RECONF_TRIG; 1673 uint64_t behaviour = H_CPU_BEHAV_FAVOUR_SECURITY; 1674 uint8_t safe_cache = spapr_get_cap(spapr, SPAPR_CAP_CFPC); 1675 uint8_t safe_bounds_check = spapr_get_cap(spapr, SPAPR_CAP_SBBC); 1676 uint8_t safe_indirect_branch = spapr_get_cap(spapr, SPAPR_CAP_IBS); 1677 1678 switch (safe_cache) { 1679 case SPAPR_CAP_WORKAROUND: 1680 characteristics |= H_CPU_CHAR_L1D_FLUSH_ORI30; 1681 characteristics |= H_CPU_CHAR_L1D_FLUSH_TRIG2; 1682 characteristics |= H_CPU_CHAR_L1D_THREAD_PRIV; 1683 behaviour |= H_CPU_BEHAV_L1D_FLUSH_PR; 1684 break; 1685 case SPAPR_CAP_FIXED: 1686 break; 1687 default: /* broken */ 1688 assert(safe_cache == SPAPR_CAP_BROKEN); 1689 behaviour |= H_CPU_BEHAV_L1D_FLUSH_PR; 1690 break; 1691 } 1692 1693 switch (safe_bounds_check) { 1694 case SPAPR_CAP_WORKAROUND: 1695 characteristics |= H_CPU_CHAR_SPEC_BAR_ORI31; 1696 behaviour |= H_CPU_BEHAV_BNDS_CHK_SPEC_BAR; 1697 break; 1698 case SPAPR_CAP_FIXED: 1699 break; 1700 default: /* broken */ 1701 assert(safe_bounds_check == SPAPR_CAP_BROKEN); 1702 behaviour |= H_CPU_BEHAV_BNDS_CHK_SPEC_BAR; 1703 break; 1704 } 1705 1706 switch (safe_indirect_branch) { 1707 case SPAPR_CAP_FIXED_CCD: 1708 characteristics |= H_CPU_CHAR_CACHE_COUNT_DIS; 1709 break; 1710 case SPAPR_CAP_FIXED_IBS: 1711 characteristics |= H_CPU_CHAR_BCCTRL_SERIALISED; 1712 break; 1713 default: /* broken */ 1714 assert(safe_indirect_branch == SPAPR_CAP_BROKEN); 1715 break; 1716 } 1717 1718 args[0] = characteristics; 1719 args[1] = behaviour; 1720 1721 return H_SUCCESS; 1722 } 1723 1724 static spapr_hcall_fn papr_hypercall_table[(MAX_HCALL_OPCODE / 4) + 1]; 1725 static spapr_hcall_fn kvmppc_hypercall_table[KVMPPC_HCALL_MAX - KVMPPC_HCALL_BASE + 1]; 1726 1727 void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn) 1728 { 1729 spapr_hcall_fn *slot; 1730 1731 if (opcode <= MAX_HCALL_OPCODE) { 1732 assert((opcode & 0x3) == 0); 1733 1734 slot = &papr_hypercall_table[opcode / 4]; 1735 } else { 1736 assert((opcode >= KVMPPC_HCALL_BASE) && (opcode <= KVMPPC_HCALL_MAX)); 1737 1738 slot = &kvmppc_hypercall_table[opcode - KVMPPC_HCALL_BASE]; 1739 } 1740 1741 assert(!(*slot)); 1742 *slot = fn; 1743 } 1744 1745 target_ulong spapr_hypercall(PowerPCCPU *cpu, target_ulong opcode, 1746 target_ulong *args) 1747 { 1748 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); 1749 1750 if ((opcode <= MAX_HCALL_OPCODE) 1751 && ((opcode & 0x3) == 0)) { 1752 spapr_hcall_fn fn = papr_hypercall_table[opcode / 4]; 1753 1754 if (fn) { 1755 return fn(cpu, spapr, opcode, args); 1756 } 1757 } else if ((opcode >= KVMPPC_HCALL_BASE) && 1758 (opcode <= KVMPPC_HCALL_MAX)) { 1759 spapr_hcall_fn fn = kvmppc_hypercall_table[opcode - KVMPPC_HCALL_BASE]; 1760 1761 if (fn) { 1762 return fn(cpu, spapr, opcode, args); 1763 } 1764 } 1765 1766 qemu_log_mask(LOG_UNIMP, "Unimplemented SPAPR hcall 0x" TARGET_FMT_lx "\n", 1767 opcode); 1768 return H_FUNCTION; 1769 } 1770 1771 static void hypercall_register_types(void) 1772 { 1773 /* hcall-pft */ 1774 spapr_register_hypercall(H_ENTER, h_enter); 1775 spapr_register_hypercall(H_REMOVE, h_remove); 1776 spapr_register_hypercall(H_PROTECT, h_protect); 1777 spapr_register_hypercall(H_READ, h_read); 1778 1779 /* hcall-bulk */ 1780 spapr_register_hypercall(H_BULK_REMOVE, h_bulk_remove); 1781 1782 /* hcall-hpt-resize */ 1783 spapr_register_hypercall(H_RESIZE_HPT_PREPARE, h_resize_hpt_prepare); 1784 spapr_register_hypercall(H_RESIZE_HPT_COMMIT, h_resize_hpt_commit); 1785 1786 /* hcall-splpar */ 1787 spapr_register_hypercall(H_REGISTER_VPA, h_register_vpa); 1788 spapr_register_hypercall(H_CEDE, h_cede); 1789 spapr_register_hypercall(H_SIGNAL_SYS_RESET, h_signal_sys_reset); 1790 1791 /* processor register resource access h-calls */ 1792 spapr_register_hypercall(H_SET_SPRG0, h_set_sprg0); 1793 spapr_register_hypercall(H_SET_DABR, h_set_dabr); 1794 spapr_register_hypercall(H_SET_XDABR, h_set_xdabr); 1795 spapr_register_hypercall(H_PAGE_INIT, h_page_init); 1796 spapr_register_hypercall(H_SET_MODE, h_set_mode); 1797 1798 /* In Memory Table MMU h-calls */ 1799 spapr_register_hypercall(H_CLEAN_SLB, h_clean_slb); 1800 spapr_register_hypercall(H_INVALIDATE_PID, h_invalidate_pid); 1801 spapr_register_hypercall(H_REGISTER_PROC_TBL, h_register_process_table); 1802 1803 /* hcall-get-cpu-characteristics */ 1804 spapr_register_hypercall(H_GET_CPU_CHARACTERISTICS, 1805 h_get_cpu_characteristics); 1806 1807 /* "debugger" hcalls (also used by SLOF). Note: We do -not- differenciate 1808 * here between the "CI" and the "CACHE" variants, they will use whatever 1809 * mapping attributes qemu is using. When using KVM, the kernel will 1810 * enforce the attributes more strongly 1811 */ 1812 spapr_register_hypercall(H_LOGICAL_CI_LOAD, h_logical_load); 1813 spapr_register_hypercall(H_LOGICAL_CI_STORE, h_logical_store); 1814 spapr_register_hypercall(H_LOGICAL_CACHE_LOAD, h_logical_load); 1815 spapr_register_hypercall(H_LOGICAL_CACHE_STORE, h_logical_store); 1816 spapr_register_hypercall(H_LOGICAL_ICBI, h_logical_icbi); 1817 spapr_register_hypercall(H_LOGICAL_DCBF, h_logical_dcbf); 1818 spapr_register_hypercall(KVMPPC_H_LOGICAL_MEMOP, h_logical_memop); 1819 1820 /* qemu/KVM-PPC specific hcalls */ 1821 spapr_register_hypercall(KVMPPC_H_RTAS, h_rtas); 1822 1823 /* ibm,client-architecture-support support */ 1824 spapr_register_hypercall(KVMPPC_H_CAS, h_client_architecture_support); 1825 } 1826 1827 type_init(hypercall_register_types) 1828