target/ppc/mmu-radix64.c

   1 /*
   2  *  PowerPC Radix MMU mulation helpers for QEMU.
   3  *
   4  *  Copyright (c) 2016 Suraj Jitindar Singh, IBM Corporation
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "cpu.h"
  22 #include "exec/exec-all.h"
  23 #include "qemu/error-report.h"
  24 #include "sysemu/kvm.h"
  25 #include "kvm_ppc.h"
  26 #include "exec/log.h"
  27 #include "internal.h"
  28 #include "mmu-radix64.h"
  29 #include "mmu-book3s-v3.h"
  30
  31 static bool ppc_radix64_get_fully_qualified_addr(const CPUPPCState *env,
  32                                                  vaddr eaddr,
  33                                                  uint64_t *lpid, uint64_t *pid)
  34 {
  35     /* When EA(2:11) are nonzero, raise a segment interrupt */
  36     if (eaddr & ~R_EADDR_VALID_MASK) {
  37         return false;
  38     }
  39
  40     if (msr_hv) { /* MSR[HV] -> Hypervisor/bare metal */
  41         switch (eaddr & R_EADDR_QUADRANT) {
  42         case R_EADDR_QUADRANT0:
  43             *lpid = 0;
  44             *pid = env->spr[SPR_BOOKS_PID];
  45             break;
  46         case R_EADDR_QUADRANT1:
  47             *lpid = env->spr[SPR_LPIDR];
  48             *pid = env->spr[SPR_BOOKS_PID];
  49             break;
  50         case R_EADDR_QUADRANT2:
  51             *lpid = env->spr[SPR_LPIDR];
  52             *pid = 0;
  53             break;
  54         case R_EADDR_QUADRANT3:
  55             *lpid = 0;
  56             *pid = 0;
  57             break;
  58         default:
  59             g_assert_not_reached();
  60         }
  61     } else {  /* !MSR[HV] -> Guest */
  62         switch (eaddr & R_EADDR_QUADRANT) {
  63         case R_EADDR_QUADRANT0: /* Guest application */
  64             *lpid = env->spr[SPR_LPIDR];
  65             *pid = env->spr[SPR_BOOKS_PID];
  66             break;
  67         case R_EADDR_QUADRANT1: /* Illegal */
  68         case R_EADDR_QUADRANT2:
  69             return false;
  70         case R_EADDR_QUADRANT3: /* Guest OS */
  71             *lpid = env->spr[SPR_LPIDR];
  72             *pid = 0; /* pid set to 0 -> addresses guest operating system */
  73             break;
  74         default:
  75             g_assert_not_reached();
  76         }
  77     }
  78
  79     return true;
  80 }
  81
  82 static void ppc_radix64_raise_segi(PowerPCCPU *cpu, MMUAccessType access_type,
  83                                    vaddr eaddr)
  84 {
  85     CPUState *cs = CPU(cpu);
  86     CPUPPCState *env = &cpu->env;
  87
  88     switch (access_type) {
  89     case MMU_INST_FETCH:
  90         /* Instruction Segment Interrupt */
  91         cs->exception_index = POWERPC_EXCP_ISEG;
  92         break;
  93     case MMU_DATA_STORE:
  94     case MMU_DATA_LOAD:
  95         /* Data Segment Interrupt */
  96         cs->exception_index = POWERPC_EXCP_DSEG;
  97         env->spr[SPR_DAR] = eaddr;
  98         break;
  99     default:
 100         g_assert_not_reached();
 101     }
 102     env->error_code = 0;
 103 }
 104
 105 static inline const char *access_str(MMUAccessType access_type)
 106 {
 107     return access_type == MMU_DATA_LOAD ? "reading" :
 108         (access_type == MMU_DATA_STORE ? "writing" : "execute");
 109 }
 110
 111 static void ppc_radix64_raise_si(PowerPCCPU *cpu, MMUAccessType access_type,
 112                                  vaddr eaddr, uint32_t cause)
 113 {
 114     CPUState *cs = CPU(cpu);
 115     CPUPPCState *env = &cpu->env;
 116
 117     qemu_log_mask(CPU_LOG_MMU, "%s for %s @0x%"VADDR_PRIx" cause %08x\n",
 118                   __func__, access_str(access_type),
 119                   eaddr, cause);
 120
 121     switch (access_type) {
 122     case MMU_INST_FETCH:
 123         /* Instruction Storage Interrupt */
 124         cs->exception_index = POWERPC_EXCP_ISI;
 125         env->error_code = cause;
 126         break;
 127     case MMU_DATA_STORE:
 128         cause |= DSISR_ISSTORE;
 129         /* fall through */
 130     case MMU_DATA_LOAD:
 131         /* Data Storage Interrupt */
 132         cs->exception_index = POWERPC_EXCP_DSI;
 133         env->spr[SPR_DSISR] = cause;
 134         env->spr[SPR_DAR] = eaddr;
 135         env->error_code = 0;
 136         break;
 137     default:
 138         g_assert_not_reached();
 139     }
 140 }
 141
 142 static void ppc_radix64_raise_hsi(PowerPCCPU *cpu, MMUAccessType access_type,
 143                                   vaddr eaddr, hwaddr g_raddr, uint32_t cause)
 144 {
 145     CPUState *cs = CPU(cpu);
 146     CPUPPCState *env = &cpu->env;
 147
 148     qemu_log_mask(CPU_LOG_MMU, "%s for %s @0x%"VADDR_PRIx" 0x%"
 149                   HWADDR_PRIx" cause %08x\n",
 150                   __func__, access_str(access_type),
 151                   eaddr, g_raddr, cause);
 152
 153     switch (access_type) {
 154     case MMU_INST_FETCH:
 155         /* H Instruction Storage Interrupt */
 156         cs->exception_index = POWERPC_EXCP_HISI;
 157         env->spr[SPR_ASDR] = g_raddr;
 158         env->error_code = cause;
 159         break;
 160     case MMU_DATA_STORE:
 161         cause |= DSISR_ISSTORE;
 162         /* fall through */
 163     case MMU_DATA_LOAD:
 164         /* H Data Storage Interrupt */
 165         cs->exception_index = POWERPC_EXCP_HDSI;
 166         env->spr[SPR_HDSISR] = cause;
 167         env->spr[SPR_HDAR] = eaddr;
 168         env->spr[SPR_ASDR] = g_raddr;
 169         env->error_code = 0;
 170         break;
 171     default:
 172         g_assert_not_reached();
 173     }
 174 }
 175
 176 static bool ppc_radix64_check_prot(PowerPCCPU *cpu, MMUAccessType access_type,
 177                                    uint64_t pte, int *fault_cause, int *prot,
 178                                    int mmu_idx, bool partition_scoped)
 179 {
 180     CPUPPCState *env = &cpu->env;
 181     int need_prot;
 182
 183     /* Check Page Attributes (pte58:59) */
 184     if ((pte & R_PTE_ATT) == R_PTE_ATT_NI_IO && access_type == MMU_INST_FETCH) {
 185         /*
 186          * Radix PTE entries with the non-idempotent I/O attribute are treated
 187          * as guarded storage
 188          */
 189         *fault_cause |= SRR1_NOEXEC_GUARD;
 190         return true;
 191     }
 192
 193     /* Determine permissions allowed by Encoded Access Authority */
 194     if (!partition_scoped && (pte & R_PTE_EAA_PRIV) && msr_pr) {
 195         *prot = 0;
 196     } else if (mmuidx_pr(mmu_idx) || (pte & R_PTE_EAA_PRIV) ||
 197                partition_scoped) {
 198         *prot = ppc_radix64_get_prot_eaa(pte);
 199     } else { /* !msr_pr && !(pte & R_PTE_EAA_PRIV) && !partition_scoped */
 200         *prot = ppc_radix64_get_prot_eaa(pte);
 201         *prot &= ppc_radix64_get_prot_amr(cpu); /* Least combined permissions */
 202     }
 203
 204     /* Check if requested access type is allowed */
 205     need_prot = prot_for_access_type(access_type);
 206     if (need_prot & ~*prot) { /* Page Protected for that Access */
 207         *fault_cause |= DSISR_PROTFAULT;
 208         return true;
 209     }
 210
 211     return false;
 212 }
 213
 214 static void ppc_radix64_set_rc(PowerPCCPU *cpu, MMUAccessType access_type,
 215                                uint64_t pte, hwaddr pte_addr, int *prot)
 216 {
 217     CPUState *cs = CPU(cpu);
 218     uint64_t npte;
 219
 220     npte = pte | R_PTE_R; /* Always set reference bit */
 221
 222     if (access_type == MMU_DATA_STORE) { /* Store/Write */
 223         npte |= R_PTE_C; /* Set change bit */
 224     } else {
 225         /*
 226          * Treat the page as read-only for now, so that a later write
 227          * will pass through this function again to set the C bit.
 228          */
 229         *prot &= ~PAGE_WRITE;
 230     }
 231
 232     if (pte ^ npte) { /* If pte has changed then write it back */
 233         stq_phys(cs->as, pte_addr, npte);
 234     }
 235 }
 236
 237 static int ppc_radix64_next_level(AddressSpace *as, vaddr eaddr,
 238                                   uint64_t *pte_addr, uint64_t *nls,
 239                                   int *psize, uint64_t *pte, int *fault_cause)
 240 {
 241     uint64_t index, pde;
 242
 243     if (*nls < 5) { /* Directory maps less than 2**5 entries */
 244         *fault_cause |= DSISR_R_BADCONFIG;
 245         return 1;
 246     }
 247
 248     /* Read page <directory/table> entry from guest address space */
 249     pde = ldq_phys(as, *pte_addr);
 250     if (!(pde & R_PTE_VALID)) {         /* Invalid Entry */
 251         *fault_cause |= DSISR_NOPTE;
 252         return 1;
 253     }
 254
 255     *pte = pde;
 256     *psize -= *nls;
 257     if (!(pde & R_PTE_LEAF)) { /* Prepare for next iteration */
 258         *nls = pde & R_PDE_NLS;
 259         index = eaddr >> (*psize - *nls);       /* Shift */
 260         index &= ((1UL << *nls) - 1);           /* Mask */
 261         *pte_addr = (pde & R_PDE_NLB) + (index * sizeof(pde));
 262     }
 263     return 0;
 264 }
 265
 266 static int ppc_radix64_walk_tree(AddressSpace *as, vaddr eaddr,
 267                                  uint64_t base_addr, uint64_t nls,
 268                                  hwaddr *raddr, int *psize, uint64_t *pte,
 269                                  int *fault_cause, hwaddr *pte_addr)
 270 {
 271     uint64_t index, pde, rpn , mask;
 272
 273     if (nls < 5) { /* Directory maps less than 2**5 entries */
 274         *fault_cause |= DSISR_R_BADCONFIG;
 275         return 1;
 276     }
 277
 278     index = eaddr >> (*psize - nls);    /* Shift */
 279     index &= ((1UL << nls) - 1);       /* Mask */
 280     *pte_addr = base_addr + (index * sizeof(pde));
 281     do {
 282         int ret;
 283
 284         ret = ppc_radix64_next_level(as, eaddr, pte_addr, &nls, psize, &pde,
 285                                      fault_cause);
 286         if (ret) {
 287             return ret;
 288         }
 289     } while (!(pde & R_PTE_LEAF));
 290
 291     *pte = pde;
 292     rpn = pde & R_PTE_RPN;
 293     mask = (1UL << *psize) - 1;
 294
 295     /* Or high bits of rpn and low bits to ea to form whole real addr */
 296     *raddr = (rpn & ~mask) | (eaddr & mask);
 297     return 0;
 298 }
 299
 300 static bool validate_pate(PowerPCCPU *cpu, uint64_t lpid, ppc_v3_pate_t *pate)
 301 {
 302     CPUPPCState *env = &cpu->env;
 303
 304     if (!(pate->dw0 & PATE0_HR)) {
 305         return false;
 306     }
 307     if (lpid == 0 && !msr_hv) {
 308         return false;
 309     }
 310     if ((pate->dw0 & PATE1_R_PRTS) < 5) {
 311         return false;
 312     }
 313     /* More checks ... */
 314     return true;
 315 }
 316
 317 static int ppc_radix64_partition_scoped_xlate(PowerPCCPU *cpu,
 318                                               MMUAccessType access_type,
 319                                               vaddr eaddr, hwaddr g_raddr,
 320                                               ppc_v3_pate_t pate,
 321                                               hwaddr *h_raddr, int *h_prot,
 322                                               int *h_page_size, bool pde_addr,
 323                                               int mmu_idx, bool guest_visible)
 324 {
 325     int fault_cause = 0;
 326     hwaddr pte_addr;
 327     uint64_t pte;
 328
 329     qemu_log_mask(CPU_LOG_MMU, "%s for %s @0x%"VADDR_PRIx
 330                   " mmu_idx %u (prot %c%c%c) 0x%"HWADDR_PRIx"\n",
 331                   __func__, access_str(access_type),
 332                   eaddr, mmu_idx,
 333                   *h_prot & PAGE_READ ? 'r' : '-',
 334                   *h_prot & PAGE_WRITE ? 'w' : '-',
 335                   *h_prot & PAGE_EXEC ? 'x' : '-',
 336                   g_raddr);
 337
 338     *h_page_size = PRTBE_R_GET_RTS(pate.dw0);
 339     /* No valid pte or access denied due to protection */
 340     if (ppc_radix64_walk_tree(CPU(cpu)->as, g_raddr, pate.dw0 & PRTBE_R_RPDB,
 341                               pate.dw0 & PRTBE_R_RPDS, h_raddr, h_page_size,
 342                               &pte, &fault_cause, &pte_addr) ||
 343         ppc_radix64_check_prot(cpu, access_type, pte,
 344                                &fault_cause, h_prot, mmu_idx, true)) {
 345         if (pde_addr) { /* address being translated was that of a guest pde */
 346             fault_cause |= DSISR_PRTABLE_FAULT;
 347         }
 348         if (guest_visible) {
 349             ppc_radix64_raise_hsi(cpu, access_type, eaddr, g_raddr, fault_cause);
 350         }
 351         return 1;
 352     }
 353
 354     if (guest_visible) {
 355         ppc_radix64_set_rc(cpu, access_type, pte, pte_addr, h_prot);
 356     }
 357
 358     return 0;
 359 }
 360
 361 static int ppc_radix64_process_scoped_xlate(PowerPCCPU *cpu,
 362                                             MMUAccessType access_type,
 363                                             vaddr eaddr, uint64_t pid,
 364                                             ppc_v3_pate_t pate, hwaddr *g_raddr,
 365                                             int *g_prot, int *g_page_size,
 366                                             int mmu_idx, bool guest_visible)
 367 {
 368     CPUState *cs = CPU(cpu);
 369     CPUPPCState *env = &cpu->env;
 370     uint64_t offset, size, prtbe_addr, prtbe0, base_addr, nls, index, pte;
 371     int fault_cause = 0, h_page_size, h_prot;
 372     hwaddr h_raddr, pte_addr;
 373     int ret;
 374
 375     qemu_log_mask(CPU_LOG_MMU, "%s for %s @0x%"VADDR_PRIx
 376                   " mmu_idx %u pid %"PRIu64"\n",
 377                   __func__, access_str(access_type),
 378                   eaddr, mmu_idx, pid);
 379
 380     /* Index Process Table by PID to Find Corresponding Process Table Entry */
 381     offset = pid * sizeof(struct prtb_entry);
 382     size = 1ULL << ((pate.dw1 & PATE1_R_PRTS) + 12);
 383     if (offset >= size) {
 384         /* offset exceeds size of the process table */
 385         if (guest_visible) {
 386             ppc_radix64_raise_si(cpu, access_type, eaddr, DSISR_NOPTE);
 387         }
 388         return 1;
 389     }
 390     prtbe_addr = (pate.dw1 & PATE1_R_PRTB) + offset;
 391
 392     if (cpu->vhyp) {
 393         prtbe0 = ldq_phys(cs->as, prtbe_addr);
 394     } else {
 395         /*
 396          * Process table addresses are subject to partition-scoped
 397          * translation
 398          *
 399          * On a Radix host, the partition-scoped page table for LPID=0
 400          * is only used to translate the effective addresses of the
 401          * process table entries.
 402          */
 403         ret = ppc_radix64_partition_scoped_xlate(cpu, 0, eaddr, prtbe_addr,
 404                                                  pate, &h_raddr, &h_prot,
 405                                                  &h_page_size, true,
 406             /* mmu_idx is 5 because we're translating from hypervisor scope */
 407                                                  5, guest_visible);
 408         if (ret) {
 409             return ret;
 410         }
 411         prtbe0 = ldq_phys(cs->as, h_raddr);
 412     }
 413
 414     /* Walk Radix Tree from Process Table Entry to Convert EA to RA */
 415     *g_page_size = PRTBE_R_GET_RTS(prtbe0);
 416     base_addr = prtbe0 & PRTBE_R_RPDB;
 417     nls = prtbe0 & PRTBE_R_RPDS;
 418     if (msr_hv || cpu->vhyp) {
 419         /*
 420          * Can treat process table addresses as real addresses
 421          */
 422         ret = ppc_radix64_walk_tree(cs->as, eaddr & R_EADDR_MASK, base_addr,
 423                                     nls, g_raddr, g_page_size, &pte,
 424                                     &fault_cause, &pte_addr);
 425         if (ret) {
 426             /* No valid PTE */
 427             if (guest_visible) {
 428                 ppc_radix64_raise_si(cpu, access_type, eaddr, fault_cause);
 429             }
 430             return ret;
 431         }
 432     } else {
 433         uint64_t rpn, mask;
 434
 435         index = (eaddr & R_EADDR_MASK) >> (*g_page_size - nls); /* Shift */
 436         index &= ((1UL << nls) - 1);                            /* Mask */
 437         pte_addr = base_addr + (index * sizeof(pte));
 438
 439         /*
 440          * Each process table address is subject to a partition-scoped
 441          * translation
 442          */
 443         do {
 444             ret = ppc_radix64_partition_scoped_xlate(cpu, 0, eaddr, pte_addr,
 445                                                      pate, &h_raddr, &h_prot,
 446                                                      &h_page_size, true,
 447             /* mmu_idx is 5 because we're translating from hypervisor scope */
 448                                                      5, guest_visible);
 449             if (ret) {
 450                 return ret;
 451             }
 452
 453             ret = ppc_radix64_next_level(cs->as, eaddr & R_EADDR_MASK, &h_raddr,
 454                                          &nls, g_page_size, &pte, &fault_cause);
 455             if (ret) {
 456                 /* No valid pte */
 457                 if (guest_visible) {
 458                     ppc_radix64_raise_si(cpu, access_type, eaddr, fault_cause);
 459                 }
 460                 return ret;
 461             }
 462             pte_addr = h_raddr;
 463         } while (!(pte & R_PTE_LEAF));
 464
 465         rpn = pte & R_PTE_RPN;
 466         mask = (1UL << *g_page_size) - 1;
 467
 468         /* Or high bits of rpn and low bits to ea to form whole real addr */
 469         *g_raddr = (rpn & ~mask) | (eaddr & mask);
 470     }
 471
 472     if (ppc_radix64_check_prot(cpu, access_type, pte, &fault_cause,
 473                                g_prot, mmu_idx, false)) {
 474         /* Access denied due to protection */
 475         if (guest_visible) {
 476             ppc_radix64_raise_si(cpu, access_type, eaddr, fault_cause);
 477         }
 478         return 1;
 479     }
 480
 481     if (guest_visible) {
 482         ppc_radix64_set_rc(cpu, access_type, pte, pte_addr, g_prot);
 483     }
 484
 485     return 0;
 486 }
 487
 488 /*
 489  * Radix tree translation is a 2 steps translation process:
 490  *
 491  * 1. Process-scoped translation:   Guest Eff Addr  -> Guest Real Addr
 492  * 2. Partition-scoped translation: Guest Real Addr -> Host Real Addr
 493  *
 494  *                                  MSR[HV]
 495  *              +-------------+----------------+---------------+
 496  *              |             |     HV = 0     |     HV = 1    |
 497  *              +-------------+----------------+---------------+
 498  *              | Relocation  |    Partition   |      No       |
 499  *              | = Off       |     Scoped     |  Translation  |
 500  *  Relocation  +-------------+----------------+---------------+
 501  *              | Relocation  |   Partition &  |    Process    |
 502  *              | = On        | Process Scoped |    Scoped     |
 503  *              +-------------+----------------+---------------+
 504  */
 505 static bool ppc_radix64_xlate_impl(PowerPCCPU *cpu, vaddr eaddr,
 506                                    MMUAccessType access_type, hwaddr *raddr,
 507                                    int *psizep, int *protp, int mmu_idx,
 508                                    bool guest_visible)
 509 {
 510     CPUPPCState *env = &cpu->env;
 511     uint64_t lpid, pid;
 512     ppc_v3_pate_t pate;
 513     int psize, prot;
 514     hwaddr g_raddr;
 515     bool relocation;
 516
 517     assert(!(mmuidx_hv(mmu_idx) && cpu->vhyp));
 518
 519     relocation = !mmuidx_real(mmu_idx);
 520
 521     /* HV or virtual hypervisor Real Mode Access */
 522     if (!relocation && (mmuidx_hv(mmu_idx) || cpu->vhyp)) {
 523         /* In real mode top 4 effective addr bits (mostly) ignored */
 524         *raddr = eaddr & 0x0FFFFFFFFFFFFFFFULL;
 525
 526         /* In HV mode, add HRMOR if top EA bit is clear */
 527         if (mmuidx_hv(mmu_idx) || !env->has_hv_mode) {
 528             if (!(eaddr >> 63)) {
 529                 *raddr |= env->spr[SPR_HRMOR];
 530            }
 531         }
 532         *protp = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
 533         *psizep = TARGET_PAGE_BITS;
 534         return true;
 535     }
 536
 537     /*
 538      * Check UPRT (we avoid the check in real mode to deal with
 539      * transitional states during kexec.
 540      */
 541     if (guest_visible && !ppc64_use_proc_tbl(cpu)) {
 542         qemu_log_mask(LOG_GUEST_ERROR,
 543                       "LPCR:UPRT not set in radix mode ! LPCR="
 544                       TARGET_FMT_lx "\n", env->spr[SPR_LPCR]);
 545     }
 546
 547     /* Virtual Mode Access - get the fully qualified address */
 548     if (!ppc_radix64_get_fully_qualified_addr(&cpu->env, eaddr, &lpid, &pid)) {
 549         if (guest_visible) {
 550             ppc_radix64_raise_segi(cpu, access_type, eaddr);
 551         }
 552         return false;
 553     }
 554
 555     /* Get Process Table */
 556     if (cpu->vhyp) {
 557         PPCVirtualHypervisorClass *vhc;
 558         vhc = PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp);
 559         vhc->get_pate(cpu->vhyp, &pate);
 560     } else {
 561         if (!ppc64_v3_get_pate(cpu, lpid, &pate)) {
 562             if (guest_visible) {
 563                 ppc_radix64_raise_si(cpu, access_type, eaddr, DSISR_NOPTE);
 564             }
 565             return false;
 566         }
 567         if (!validate_pate(cpu, lpid, &pate)) {
 568             if (guest_visible) {
 569                 ppc_radix64_raise_si(cpu, access_type, eaddr, DSISR_R_BADCONFIG);
 570             }
 571             return false;
 572         }
 573     }
 574
 575     *psizep = INT_MAX;
 576     *protp = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
 577
 578     /*
 579      * Perform process-scoped translation if relocation enabled.
 580      *
 581      * - Translates an effective address to a host real address in
 582      *   quadrants 0 and 3 when HV=1.
 583      *
 584      * - Translates an effective address to a guest real address.
 585      */
 586     if (relocation) {
 587         int ret = ppc_radix64_process_scoped_xlate(cpu, access_type, eaddr, pid,
 588                                                    pate, &g_raddr, &prot,
 589                                                    &psize, mmu_idx, guest_visible);
 590         if (ret) {
 591             return false;
 592         }
 593         *psizep = MIN(*psizep, psize);
 594         *protp &= prot;
 595     } else {
 596         g_raddr = eaddr & R_EADDR_MASK;
 597     }
 598
 599     if (cpu->vhyp) {
 600         *raddr = g_raddr;
 601     } else {
 602         /*
 603          * Perform partition-scoped translation if !HV or HV access to
 604          * quadrants 1 or 2. Translates a guest real address to a host
 605          * real address.
 606          */
 607         if (lpid || !mmuidx_hv(mmu_idx)) {
 608             int ret;
 609
 610             ret = ppc_radix64_partition_scoped_xlate(cpu, access_type, eaddr,
 611                                                      g_raddr, pate, raddr,
 612                                                      &prot, &psize, false,
 613                                                      mmu_idx, guest_visible);
 614             if (ret) {
 615                 return false;
 616             }
 617             *psizep = MIN(*psizep, psize);
 618             *protp &= prot;
 619         } else {
 620             *raddr = g_raddr;
 621         }
 622     }
 623
 624     return true;
 625 }
 626
 627 bool ppc_radix64_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
 628                        hwaddr *raddrp, int *psizep, int *protp, int mmu_idx,
 629                        bool guest_visible)
 630 {
 631     bool ret = ppc_radix64_xlate_impl(cpu, eaddr, access_type, raddrp,
 632                                       psizep, protp, mmu_idx, guest_visible);
 633
 634     qemu_log_mask(CPU_LOG_MMU, "%s for %s @0x%"VADDR_PRIx
 635                   " mmu_idx %u (prot %c%c%c) -> 0x%"HWADDR_PRIx"\n",
 636                   __func__, access_str(access_type),
 637                   eaddr, mmu_idx,
 638                   *protp & PAGE_READ ? 'r' : '-',
 639                   *protp & PAGE_WRITE ? 'w' : '-',
 640                   *protp & PAGE_EXEC ? 'x' : '-',
 641                   *raddrp);
 642
 643     return ret;
 644 }