Pileus Git - ~andy/linux/blob - arch/powerpc/kvm/book3s.c

   1 /*
   2  * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
   3  *
   4  * Authors:
   5  *    Alexander Graf <agraf@suse.de>
   6  *    Kevin Wolf <mail@kevin-wolf.de>
   7  *
   8  * Description:
   9  * This file is derived from arch/powerpc/kvm/44x.c,
  10  * by Hollis Blanchard <hollisb@us.ibm.com>.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License, version 2, as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/kvm_host.h>
  18 #include <linux/err.h>
  19 #include <linux/slab.h>
  20
  21 #include <asm/reg.h>
  22 #include <asm/cputable.h>
  23 #include <asm/cacheflush.h>
  24 #include <asm/tlbflush.h>
  25 #include <asm/uaccess.h>
  26 #include <asm/io.h>
  27 #include <asm/kvm_ppc.h>
  28 #include <asm/kvm_book3s.h>
  29 #include <asm/mmu_context.h>
  30 #include <linux/gfp.h>
  31 #include <linux/sched.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/highmem.h>
  34
  35 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  36
  37 /* #define EXIT_DEBUG */
  38 /* #define EXIT_DEBUG_SIMPLE */
  39 /* #define DEBUG_EXT */
  40
  41 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
  42                              ulong msr);
  43
  44 /* Some compatibility defines */
  45 #ifdef CONFIG_PPC_BOOK3S_32
  46 #define MSR_USER32 MSR_USER
  47 #define MSR_USER64 MSR_USER
  48 #define HW_PAGE_SIZE PAGE_SIZE
  49 #endif
  50
  51 struct kvm_stats_debugfs_item debugfs_entries[] = {
  52         { "exits",       VCPU_STAT(sum_exits) },
  53         { "mmio",        VCPU_STAT(mmio_exits) },
  54         { "sig",         VCPU_STAT(signal_exits) },
  55         { "sysc",        VCPU_STAT(syscall_exits) },
  56         { "inst_emu",    VCPU_STAT(emulated_inst_exits) },
  57         { "dec",         VCPU_STAT(dec_exits) },
  58         { "ext_intr",    VCPU_STAT(ext_intr_exits) },
  59         { "queue_intr",  VCPU_STAT(queue_intr) },
  60         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  61         { "pf_storage",  VCPU_STAT(pf_storage) },
  62         { "sp_storage",  VCPU_STAT(sp_storage) },
  63         { "pf_instruc",  VCPU_STAT(pf_instruc) },
  64         { "sp_instruc",  VCPU_STAT(sp_instruc) },
  65         { "ld",          VCPU_STAT(ld) },
  66         { "ld_slow",     VCPU_STAT(ld_slow) },
  67         { "st",          VCPU_STAT(st) },
  68         { "st_slow",     VCPU_STAT(st_slow) },
  69         { NULL }
  70 };
  71
  72 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
  73 {
  74 }
  75
  76 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
  77 {
  78 }
  79
  80 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
  81 {
  82 #ifdef CONFIG_PPC_BOOK3S_64
  83         memcpy(to_svcpu(vcpu)->slb, to_book3s(vcpu)->slb_shadow, sizeof(to_svcpu(vcpu)->slb));
  84         memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu,
  85                sizeof(get_paca()->shadow_vcpu));
  86         to_svcpu(vcpu)->slb_max = to_book3s(vcpu)->slb_shadow_max;
  87 #endif
  88
  89 #ifdef CONFIG_PPC_BOOK3S_32
  90         current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu;
  91 #endif
  92 }
  93
  94 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
  95 {
  96 #ifdef CONFIG_PPC_BOOK3S_64
  97         memcpy(to_book3s(vcpu)->slb_shadow, to_svcpu(vcpu)->slb, sizeof(to_svcpu(vcpu)->slb));
  98         memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
  99                sizeof(get_paca()->shadow_vcpu));
 100         to_book3s(vcpu)->slb_shadow_max = to_svcpu(vcpu)->slb_max;
 101 #endif
 102
 103         kvmppc_giveup_ext(vcpu, MSR_FP);
 104         kvmppc_giveup_ext(vcpu, MSR_VEC);
 105         kvmppc_giveup_ext(vcpu, MSR_VSX);
 106 }
 107
 108 #if defined(EXIT_DEBUG)
 109 static u32 kvmppc_get_dec(struct kvm_vcpu *vcpu)
 110 {
 111         u64 jd = mftb() - vcpu->arch.dec_jiffies;
 112         return vcpu->arch.dec - jd;
 113 }
 114 #endif
 115
 116 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
 117 {
 118         ulong smsr = vcpu->arch.shared->msr;
 119
 120         /* Guest MSR values */
 121         smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_DE;
 122         /* Process MSR values */
 123         smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
 124         /* External providers the guest reserved */
 125         smsr |= (vcpu->arch.shared->msr & vcpu->arch.guest_owned_ext);
 126         /* 64-bit Process MSR values */
 127 #ifdef CONFIG_PPC_BOOK3S_64
 128         smsr |= MSR_ISF | MSR_HV;
 129 #endif
 130         vcpu->arch.shadow_msr = smsr;
 131 }
 132
 133 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 134 {
 135         ulong old_msr = vcpu->arch.shared->msr;
 136
 137 #ifdef EXIT_DEBUG
 138         printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
 139 #endif
 140
 141         msr &= to_book3s(vcpu)->msr_mask;
 142         vcpu->arch.shared->msr = msr;
 143         kvmppc_recalc_shadow_msr(vcpu);
 144
 145         if (msr & (MSR_WE|MSR_POW)) {
 146                 if (!vcpu->arch.pending_exceptions) {
 147                         kvm_vcpu_block(vcpu);
 148                         vcpu->stat.halt_wakeup++;
 149                 }
 150         }
 151
 152         if ((vcpu->arch.shared->msr & (MSR_PR|MSR_IR|MSR_DR)) !=
 153                    (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
 154                 kvmppc_mmu_flush_segments(vcpu);
 155                 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
 156         }
 157
 158         /* Preload FPU if it's enabled */
 159         if (vcpu->arch.shared->msr & MSR_FP)
 160                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
 161 }
 162
 163 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 164 {
 165         vcpu->arch.srr0 = kvmppc_get_pc(vcpu);
 166         vcpu->arch.srr1 = vcpu->arch.shared->msr | flags;
 167         kvmppc_set_pc(vcpu, to_book3s(vcpu)->hior + vec);
 168         vcpu->arch.mmu.reset_msr(vcpu);
 169 }
 170
 171 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
 172 {
 173         unsigned int prio;
 174
 175         switch (vec) {
 176         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
 177         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
 178         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
 179         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
 180         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
 181         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
 182         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
 183         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
 184         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
 185         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
 186         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
 187         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
 188         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
 189         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
 190         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
 191         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 192         }
 193
 194         return prio;
 195 }
 196
 197 static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 198                                           unsigned int vec)
 199 {
 200         clear_bit(kvmppc_book3s_vec2irqprio(vec),
 201                   &vcpu->arch.pending_exceptions);
 202 }
 203
 204 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 205 {
 206         vcpu->stat.queue_intr++;
 207
 208         set_bit(kvmppc_book3s_vec2irqprio(vec),
 209                 &vcpu->arch.pending_exceptions);
 210 #ifdef EXIT_DEBUG
 211         printk(KERN_INFO "Queueing interrupt %x\n", vec);
 212 #endif
 213 }
 214
 215
 216 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 217 {
 218         to_book3s(vcpu)->prog_flags = flags;
 219         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM);
 220 }
 221
 222 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 223 {
 224         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 225 }
 226
 227 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 228 {
 229         return test_bit(BOOK3S_INTERRUPT_DECREMENTER >> 7, &vcpu->arch.pending_exceptions);
 230 }
 231
 232 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 233 {
 234         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 235 }
 236
 237 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 238                                 struct kvm_interrupt *irq)
 239 {
 240         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 241 }
 242
 243 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
 244                                   struct kvm_interrupt *irq)
 245 {
 246         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 247 }
 248
 249 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
 250 {
 251         int deliver = 1;
 252         int vec = 0;
 253         ulong flags = 0ULL;
 254
 255         switch (priority) {
 256         case BOOK3S_IRQPRIO_DECREMENTER:
 257                 deliver = vcpu->arch.shared->msr & MSR_EE;
 258                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 259                 break;
 260         case BOOK3S_IRQPRIO_EXTERNAL:
 261                 deliver = vcpu->arch.shared->msr & MSR_EE;
 262                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 263                 break;
 264         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 265                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 266                 break;
 267         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 268                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 269                 break;
 270         case BOOK3S_IRQPRIO_DATA_STORAGE:
 271                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 272                 break;
 273         case BOOK3S_IRQPRIO_INST_STORAGE:
 274                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 275                 break;
 276         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 277                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 278                 break;
 279         case BOOK3S_IRQPRIO_INST_SEGMENT:
 280                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 281                 break;
 282         case BOOK3S_IRQPRIO_ALIGNMENT:
 283                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 284                 break;
 285         case BOOK3S_IRQPRIO_PROGRAM:
 286                 vec = BOOK3S_INTERRUPT_PROGRAM;
 287                 flags = to_book3s(vcpu)->prog_flags;
 288                 break;
 289         case BOOK3S_IRQPRIO_VSX:
 290                 vec = BOOK3S_INTERRUPT_VSX;
 291                 break;
 292         case BOOK3S_IRQPRIO_ALTIVEC:
 293                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 294                 break;
 295         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 296                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 297                 break;
 298         case BOOK3S_IRQPRIO_SYSCALL:
 299                 vec = BOOK3S_INTERRUPT_SYSCALL;
 300                 break;
 301         case BOOK3S_IRQPRIO_DEBUG:
 302                 vec = BOOK3S_INTERRUPT_TRACE;
 303                 break;
 304         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 305                 vec = BOOK3S_INTERRUPT_PERFMON;
 306                 break;
 307         default:
 308                 deliver = 0;
 309                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 310                 break;
 311         }
 312
 313 #if 0
 314         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 315 #endif
 316
 317         if (deliver)
 318                 kvmppc_inject_interrupt(vcpu, vec, flags);
 319
 320         return deliver;
 321 }
 322
 323 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 324 {
 325         unsigned long *pending = &vcpu->arch.pending_exceptions;
 326         unsigned int priority;
 327
 328 #ifdef EXIT_DEBUG
 329         if (vcpu->arch.pending_exceptions)
 330                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 331 #endif
 332         priority = __ffs(*pending);
 333         while (priority < BOOK3S_IRQPRIO_MAX) {
 334                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 335                     (priority != BOOK3S_IRQPRIO_DECREMENTER)) {
 336                         /* DEC interrupts get cleared by mtdec */
 337                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 338                         break;
 339                 }
 340
 341                 priority = find_next_bit(pending,
 342                                          BITS_PER_BYTE * sizeof(*pending),
 343                                          priority + 1);
 344         }
 345 }
 346
 347 void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
 348 {
 349         u32 host_pvr;
 350
 351         vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
 352         vcpu->arch.pvr = pvr;
 353 #ifdef CONFIG_PPC_BOOK3S_64
 354         if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
 355                 kvmppc_mmu_book3s_64_init(vcpu);
 356                 to_book3s(vcpu)->hior = 0xfff00000;
 357                 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
 358         } else
 359 #endif
 360         {
 361                 kvmppc_mmu_book3s_32_init(vcpu);
 362                 to_book3s(vcpu)->hior = 0;
 363                 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
 364         }
 365
 366         /* If we are in hypervisor level on 970, we can tell the CPU to
 367          * treat DCBZ as 32 bytes store */
 368         vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
 369         if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
 370             !strcmp(cur_cpu_spec->platform, "ppc970"))
 371                 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 372
 373         /* Cell performs badly if MSR_FEx are set. So let's hope nobody
 374            really needs them in a VM on Cell and force disable them. */
 375         if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
 376                 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
 377
 378 #ifdef CONFIG_PPC_BOOK3S_32
 379         /* 32 bit Book3S always has 32 byte dcbz */
 380         vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 381 #endif
 382
 383         /* On some CPUs we can execute paired single operations natively */
 384         asm ( "mfpvr %0" : "=r"(host_pvr));
 385         switch (host_pvr) {
 386         case 0x00080200:        /* lonestar 2.0 */
 387         case 0x00088202:        /* lonestar 2.2 */
 388         case 0x70000100:        /* gekko 1.0 */
 389         case 0x00080100:        /* gekko 2.0 */
 390         case 0x00083203:        /* gekko 2.3a */
 391         case 0x00083213:        /* gekko 2.3b */
 392         case 0x00083204:        /* gekko 2.4 */
 393         case 0x00083214:        /* gekko 2.4e (8SE) - retail HW2 */
 394         case 0x00087200:        /* broadway */
 395                 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
 396                 /* Enable HID2.PSE - in case we need it later */
 397                 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
 398         }
 399 }
 400
 401 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
 402  * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
 403  * emulate 32 bytes dcbz length.
 404  *
 405  * The Book3s_64 inventors also realized this case and implemented a special bit
 406  * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
 407  *
 408  * My approach here is to patch the dcbz instruction on executing pages.
 409  */
 410 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
 411 {
 412         struct page *hpage;
 413         u64 hpage_offset;
 414         u32 *page;
 415         int i;
 416
 417         hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 418         if (is_error_page(hpage))
 419                 return;
 420
 421         hpage_offset = pte->raddr & ~PAGE_MASK;
 422         hpage_offset &= ~0xFFFULL;
 423         hpage_offset /= 4;
 424
 425         get_page(hpage);
 426         page = kmap_atomic(hpage, KM_USER0);
 427
 428         /* patch dcbz into reserved instruction, so we trap */
 429         for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
 430                 if ((page[i] & 0xff0007ff) == INS_DCBZ)
 431                         page[i] &= 0xfffffff7;
 432
 433         kunmap_atomic(page, KM_USER0);
 434         put_page(hpage);
 435 }
 436
 437 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
 438                          struct kvmppc_pte *pte)
 439 {
 440         int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
 441         int r;
 442
 443         if (relocated) {
 444                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
 445         } else {
 446                 pte->eaddr = eaddr;
 447                 pte->raddr = eaddr & 0xffffffff;
 448                 pte->vpage = VSID_REAL | eaddr >> 12;
 449                 pte->may_read = true;
 450                 pte->may_write = true;
 451                 pte->may_execute = true;
 452                 r = 0;
 453         }
 454
 455         return r;
 456 }
 457
 458 static hva_t kvmppc_bad_hva(void)
 459 {
 460         return PAGE_OFFSET;
 461 }
 462
 463 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
 464                                bool read)
 465 {
 466         hva_t hpage;
 467
 468         if (read && !pte->may_read)
 469                 goto err;
 470
 471         if (!read && !pte->may_write)
 472                 goto err;
 473
 474         hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 475         if (kvm_is_error_hva(hpage))
 476                 goto err;
 477
 478         return hpage | (pte->raddr & ~PAGE_MASK);
 479 err:
 480         return kvmppc_bad_hva();
 481 }
 482
 483 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 484               bool data)
 485 {
 486         struct kvmppc_pte pte;
 487
 488         vcpu->stat.st++;
 489
 490         if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
 491                 return -ENOENT;
 492
 493         *eaddr = pte.raddr;
 494
 495         if (!pte.may_write)
 496                 return -EPERM;
 497
 498         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 499                 return EMULATE_DO_MMIO;
 500
 501         return EMULATE_DONE;
 502 }
 503
 504 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 505                       bool data)
 506 {
 507         struct kvmppc_pte pte;
 508         hva_t hva = *eaddr;
 509
 510         vcpu->stat.ld++;
 511
 512         if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
 513                 goto nopte;
 514
 515         *eaddr = pte.raddr;
 516
 517         hva = kvmppc_pte_to_hva(vcpu, &pte, true);
 518         if (kvm_is_error_hva(hva))
 519                 goto mmio;
 520
 521         if (copy_from_user(ptr, (void __user *)hva, size)) {
 522                 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
 523                 goto mmio;
 524         }
 525
 526         return EMULATE_DONE;
 527
 528 nopte:
 529         return -ENOENT;
 530 mmio:
 531         return EMULATE_DO_MMIO;
 532 }
 533
 534 static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
 535 {
 536         return kvm_is_visible_gfn(vcpu->kvm, gfn);
 537 }
 538
 539 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
 540                             ulong eaddr, int vec)
 541 {
 542         bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
 543         int r = RESUME_GUEST;
 544         int relocated;
 545         int page_found = 0;
 546         struct kvmppc_pte pte;
 547         bool is_mmio = false;
 548         bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
 549         bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
 550         u64 vsid;
 551
 552         relocated = data ? dr : ir;
 553
 554         /* Resolve real address if translation turned on */
 555         if (relocated) {
 556                 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
 557         } else {
 558                 pte.may_execute = true;
 559                 pte.may_read = true;
 560                 pte.may_write = true;
 561                 pte.raddr = eaddr & 0xffffffff;
 562                 pte.eaddr = eaddr;
 563                 pte.vpage = eaddr >> 12;
 564         }
 565
 566         switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
 567         case 0:
 568                 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
 569                 break;
 570         case MSR_DR:
 571         case MSR_IR:
 572                 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
 573
 574                 if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
 575                         pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
 576                 else
 577                         pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
 578                 pte.vpage |= vsid;
 579
 580                 if (vsid == -1)
 581                         page_found = -EINVAL;
 582                 break;
 583         }
 584
 585         if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 586            (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
 587                 /*
 588                  * If we do the dcbz hack, we have to NX on every execution,
 589                  * so we can patch the executing code. This renders our guest
 590                  * NX-less.
 591                  */
 592                 pte.may_execute = !data;
 593         }
 594
 595         if (page_found == -ENOENT) {
 596                 /* Page not found in guest PTE entries */
 597                 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 598                 vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
 599                 vcpu->arch.shared->msr |=
 600                         (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
 601                 kvmppc_book3s_queue_irqprio(vcpu, vec);
 602         } else if (page_found == -EPERM) {
 603                 /* Storage protection */
 604                 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 605                 vcpu->arch.shared->dsisr =
 606                         to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE;
 607                 vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
 608                 vcpu->arch.shared->msr |=
 609                         (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
 610                 kvmppc_book3s_queue_irqprio(vcpu, vec);
 611         } else if (page_found == -EINVAL) {
 612                 /* Page not found in guest SLB */
 613                 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 614                 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
 615         } else if (!is_mmio &&
 616                    kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
 617                 /* The guest's PTE is not mapped yet. Map on the host */
 618                 kvmppc_mmu_map_page(vcpu, &pte);
 619                 if (data)
 620                         vcpu->stat.sp_storage++;
 621                 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 622                         (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
 623                         kvmppc_patch_dcbz(vcpu, &pte);
 624         } else {
 625                 /* MMIO */
 626                 vcpu->stat.mmio_exits++;
 627                 vcpu->arch.paddr_accessed = pte.raddr;
 628                 r = kvmppc_emulate_mmio(run, vcpu);
 629                 if ( r == RESUME_HOST_NV )
 630                         r = RESUME_HOST;
 631         }
 632
 633         return r;
 634 }
 635
 636 static inline int get_fpr_index(int i)
 637 {
 638 #ifdef CONFIG_VSX
 639         i *= 2;
 640 #endif
 641         return i;
 642 }
 643
 644 /* Give up external provider (FPU, Altivec, VSX) */
 645 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
 646 {
 647         struct thread_struct *t = &current->thread;
 648         u64 *vcpu_fpr = vcpu->arch.fpr;
 649 #ifdef CONFIG_VSX
 650         u64 *vcpu_vsx = vcpu->arch.vsr;
 651 #endif
 652         u64 *thread_fpr = (u64*)t->fpr;
 653         int i;
 654
 655         if (!(vcpu->arch.guest_owned_ext & msr))
 656                 return;
 657
 658 #ifdef DEBUG_EXT
 659         printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
 660 #endif
 661
 662         switch (msr) {
 663         case MSR_FP:
 664                 giveup_fpu(current);
 665                 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
 666                         vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];
 667
 668                 vcpu->arch.fpscr = t->fpscr.val;
 669                 break;
 670         case MSR_VEC:
 671 #ifdef CONFIG_ALTIVEC
 672                 giveup_altivec(current);
 673                 memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
 674                 vcpu->arch.vscr = t->vscr;
 675 #endif
 676                 break;
 677         case MSR_VSX:
 678 #ifdef CONFIG_VSX
 679                 __giveup_vsx(current);
 680                 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
 681                         vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1];
 682 #endif
 683                 break;
 684         default:
 685                 BUG();
 686         }
 687
 688         vcpu->arch.guest_owned_ext &= ~msr;
 689         current->thread.regs->msr &= ~msr;
 690         kvmppc_recalc_shadow_msr(vcpu);
 691 }
 692
 693 static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
 694 {
 695         ulong srr0 = kvmppc_get_pc(vcpu);
 696         u32 last_inst = kvmppc_get_last_inst(vcpu);
 697         int ret;
 698
 699         ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
 700         if (ret == -ENOENT) {
 701                 ulong msr = vcpu->arch.shared->msr;
 702
 703                 msr = kvmppc_set_field(msr, 33, 33, 1);
 704                 msr = kvmppc_set_field(msr, 34, 36, 0);
 705                 vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
 706                 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
 707                 return EMULATE_AGAIN;
 708         }
 709
 710         return EMULATE_DONE;
 711 }
 712
 713 static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
 714 {
 715
 716         /* Need to do paired single emulation? */
 717         if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
 718                 return EMULATE_DONE;
 719
 720         /* Read out the instruction */
 721         if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
 722                 /* Need to emulate */
 723                 return EMULATE_FAIL;
 724
 725         return EMULATE_AGAIN;
 726 }
 727
 728 /* Handle external providers (FPU, Altivec, VSX) */
 729 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
 730                              ulong msr)
 731 {
 732         struct thread_struct *t = &current->thread;
 733         u64 *vcpu_fpr = vcpu->arch.fpr;
 734 #ifdef CONFIG_VSX
 735         u64 *vcpu_vsx = vcpu->arch.vsr;
 736 #endif
 737         u64 *thread_fpr = (u64*)t->fpr;
 738         int i;
 739
 740         /* When we have paired singles, we emulate in software */
 741         if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
 742                 return RESUME_GUEST;
 743
 744         if (!(vcpu->arch.shared->msr & msr)) {
 745                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 746                 return RESUME_GUEST;
 747         }
 748
 749         /* We already own the ext */
 750         if (vcpu->arch.guest_owned_ext & msr) {
 751                 return RESUME_GUEST;
 752         }
 753
 754 #ifdef DEBUG_EXT
 755         printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
 756 #endif
 757
 758         current->thread.regs->msr |= msr;
 759
 760         switch (msr) {
 761         case MSR_FP:
 762                 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
 763                         thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];
 764
 765                 t->fpscr.val = vcpu->arch.fpscr;
 766                 t->fpexc_mode = 0;
 767                 kvmppc_load_up_fpu();
 768                 break;
 769         case MSR_VEC:
 770 #ifdef CONFIG_ALTIVEC
 771                 memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
 772                 t->vscr = vcpu->arch.vscr;
 773                 t->vrsave = -1;
 774                 kvmppc_load_up_altivec();
 775 #endif
 776                 break;
 777         case MSR_VSX:
 778 #ifdef CONFIG_VSX
 779                 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
 780                         thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
 781                 kvmppc_load_up_vsx();
 782 #endif
 783                 break;
 784         default:
 785                 BUG();
 786         }
 787
 788         vcpu->arch.guest_owned_ext |= msr;
 789
 790         kvmppc_recalc_shadow_msr(vcpu);
 791
 792         return RESUME_GUEST;
 793 }
 794
 795 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 796                        unsigned int exit_nr)
 797 {
 798         int r = RESUME_HOST;
 799
 800         vcpu->stat.sum_exits++;
 801
 802         run->exit_reason = KVM_EXIT_UNKNOWN;
 803         run->ready_for_interrupt_injection = 1;
 804 #ifdef EXIT_DEBUG
 805         printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | dec=0x%x | msr=0x%lx\n",
 806                 exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu),
 807                 kvmppc_get_dec(vcpu), to_svcpu(vcpu)->shadow_srr1);
 808 #elif defined (EXIT_DEBUG_SIMPLE)
 809         if ((exit_nr != 0x900) && (exit_nr != 0x500))
 810                 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | msr=0x%lx\n",
 811                         exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu),
 812                         vcpu->arch.shared->msr);
 813 #endif
 814         kvm_resched(vcpu);
 815         switch (exit_nr) {
 816         case BOOK3S_INTERRUPT_INST_STORAGE:
 817                 vcpu->stat.pf_instruc++;
 818
 819 #ifdef CONFIG_PPC_BOOK3S_32
 820                 /* We set segments as unused segments when invalidating them. So
 821                  * treat the respective fault as segment fault. */
 822                 if (to_svcpu(vcpu)->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT]
 823                     == SR_INVALID) {
 824                         kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
 825                         r = RESUME_GUEST;
 826                         break;
 827                 }
 828 #endif
 829
 830                 /* only care about PTEG not found errors, but leave NX alone */
 831                 if (to_svcpu(vcpu)->shadow_srr1 & 0x40000000) {
 832                         r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
 833                         vcpu->stat.sp_instruc++;
 834                 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 835                           (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
 836                         /*
 837                          * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
 838                          *     so we can't use the NX bit inside the guest. Let's cross our fingers,
 839                          *     that no guest that needs the dcbz hack does NX.
 840                          */
 841                         kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
 842                         r = RESUME_GUEST;
 843                 } else {
 844                         vcpu->arch.shared->msr |=
 845                                 to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
 846                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 847                         kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
 848                         r = RESUME_GUEST;
 849                 }
 850                 break;
 851         case BOOK3S_INTERRUPT_DATA_STORAGE:
 852         {
 853                 ulong dar = kvmppc_get_fault_dar(vcpu);
 854                 vcpu->stat.pf_storage++;
 855
 856 #ifdef CONFIG_PPC_BOOK3S_32
 857                 /* We set segments as unused segments when invalidating them. So
 858                  * treat the respective fault as segment fault. */
 859                 if ((to_svcpu(vcpu)->sr[dar >> SID_SHIFT]) == SR_INVALID) {
 860                         kvmppc_mmu_map_segment(vcpu, dar);
 861                         r = RESUME_GUEST;
 862                         break;
 863                 }
 864 #endif
 865
 866                 /* The only case we need to handle is missing shadow PTEs */
 867                 if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) {
 868                         r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
 869                 } else {
 870                         vcpu->arch.shared->dar = dar;
 871                         vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
 872                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 873                         kvmppc_mmu_pte_flush(vcpu, dar, ~0xFFFUL);
 874                         r = RESUME_GUEST;
 875                 }
 876                 break;
 877         }
 878         case BOOK3S_INTERRUPT_DATA_SEGMENT:
 879                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
 880                         vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 881                         kvmppc_book3s_queue_irqprio(vcpu,
 882                                 BOOK3S_INTERRUPT_DATA_SEGMENT);
 883                 }
 884                 r = RESUME_GUEST;
 885                 break;
 886         case BOOK3S_INTERRUPT_INST_SEGMENT:
 887                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
 888                         kvmppc_book3s_queue_irqprio(vcpu,
 889                                 BOOK3S_INTERRUPT_INST_SEGMENT);
 890                 }
 891                 r = RESUME_GUEST;
 892                 break;
 893         /* We're good on these - the host merely wanted to get our attention */
 894         case BOOK3S_INTERRUPT_DECREMENTER:
 895                 vcpu->stat.dec_exits++;
 896                 r = RESUME_GUEST;
 897                 break;
 898         case BOOK3S_INTERRUPT_EXTERNAL:
 899                 vcpu->stat.ext_intr_exits++;
 900                 r = RESUME_GUEST;
 901                 break;
 902         case BOOK3S_INTERRUPT_PERFMON:
 903                 r = RESUME_GUEST;
 904                 break;
 905         case BOOK3S_INTERRUPT_PROGRAM:
 906         {
 907                 enum emulation_result er;
 908                 ulong flags;
 909
 910 program_interrupt:
 911                 flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull;
 912
 913                 if (vcpu->arch.shared->msr & MSR_PR) {
 914 #ifdef EXIT_DEBUG
 915                         printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
 916 #endif
 917                         if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
 918                             (INS_DCBZ & 0xfffffff7)) {
 919                                 kvmppc_core_queue_program(vcpu, flags);
 920                                 r = RESUME_GUEST;
 921                                 break;
 922                         }
 923                 }
 924
 925                 vcpu->stat.emulated_inst_exits++;
 926                 er = kvmppc_emulate_instruction(run, vcpu);
 927                 switch (er) {
 928                 case EMULATE_DONE:
 929                         r = RESUME_GUEST_NV;
 930                         break;
 931                 case EMULATE_AGAIN:
 932                         r = RESUME_GUEST;
 933                         break;
 934                 case EMULATE_FAIL:
 935                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 936                                __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
 937                         kvmppc_core_queue_program(vcpu, flags);
 938                         r = RESUME_GUEST;
 939                         break;
 940                 case EMULATE_DO_MMIO:
 941                         run->exit_reason = KVM_EXIT_MMIO;
 942                         r = RESUME_HOST_NV;
 943                         break;
 944                 default:
 945                         BUG();
 946                 }
 947                 break;
 948         }
 949         case BOOK3S_INTERRUPT_SYSCALL:
 950                 // XXX make user settable
 951                 if (vcpu->arch.osi_enabled &&
 952                     (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
 953                     (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
 954                         u64 *gprs = run->osi.gprs;
 955                         int i;
 956
 957                         run->exit_reason = KVM_EXIT_OSI;
 958                         for (i = 0; i < 32; i++)
 959                                 gprs[i] = kvmppc_get_gpr(vcpu, i);
 960                         vcpu->arch.osi_needed = 1;
 961                         r = RESUME_HOST_NV;
 962
 963                 } else {
 964                         vcpu->stat.syscall_exits++;
 965                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 966                         r = RESUME_GUEST;
 967                 }
 968                 break;
 969         case BOOK3S_INTERRUPT_FP_UNAVAIL:
 970         case BOOK3S_INTERRUPT_ALTIVEC:
 971         case BOOK3S_INTERRUPT_VSX:
 972         {
 973                 int ext_msr = 0;
 974
 975                 switch (exit_nr) {
 976                 case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP;  break;
 977                 case BOOK3S_INTERRUPT_ALTIVEC:    ext_msr = MSR_VEC; break;
 978                 case BOOK3S_INTERRUPT_VSX:        ext_msr = MSR_VSX; break;
 979                 }
 980
 981                 switch (kvmppc_check_ext(vcpu, exit_nr)) {
 982                 case EMULATE_DONE:
 983                         /* everything ok - let's enable the ext */
 984                         r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
 985                         break;
 986                 case EMULATE_FAIL:
 987                         /* we need to emulate this instruction */
 988                         goto program_interrupt;
 989                         break;
 990                 default:
 991                         /* nothing to worry about - go again */
 992                         break;
 993                 }
 994                 break;
 995         }
 996         case BOOK3S_INTERRUPT_ALIGNMENT:
 997                 if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
 998                         vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
 999                                 kvmppc_get_last_inst(vcpu));
1000                         vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
1001                                 kvmppc_get_last_inst(vcpu));
1002                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1003                 }
1004                 r = RESUME_GUEST;
1005                 break;
1006         case BOOK3S_INTERRUPT_MACHINE_CHECK:
1007         case BOOK3S_INTERRUPT_TRACE:
1008                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1009                 r = RESUME_GUEST;
1010                 break;
1011         default:
1012                 /* Ugh - bork here! What did we get? */
1013                 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
1014                         exit_nr, kvmppc_get_pc(vcpu), to_svcpu(vcpu)->shadow_srr1);
1015                 r = RESUME_HOST;
1016                 BUG();
1017                 break;
1018         }
1019
1020
1021         if (!(r & RESUME_HOST)) {
1022                 /* To avoid clobbering exit_reason, only check for signals if
1023                  * we aren't already exiting to userspace for some other
1024                  * reason. */
1025                 if (signal_pending(current)) {
1026 #ifdef EXIT_DEBUG
1027                         printk(KERN_EMERG "KVM: Going back to host\n");
1028 #endif
1029                         vcpu->stat.signal_exits++;
1030                         run->exit_reason = KVM_EXIT_INTR;
1031                         r = -EINTR;
1032                 } else {
1033                         /* In case an interrupt came in that was triggered
1034                          * from userspace (like DEC), we need to check what
1035                          * to inject now! */
1036                         kvmppc_core_deliver_interrupts(vcpu);
1037                 }
1038         }
1039
1040 #ifdef EXIT_DEBUG
1041         printk(KERN_EMERG "KVM exit: vcpu=0x%p pc=0x%lx r=0x%x\n", vcpu, kvmppc_get_pc(vcpu), r);
1042 #endif
1043
1044         return r;
1045 }
1046
1047 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1048 {
1049         return 0;
1050 }
1051
1052 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1053 {
1054         int i;
1055
1056         regs->pc = kvmppc_get_pc(vcpu);
1057         regs->cr = kvmppc_get_cr(vcpu);
1058         regs->ctr = kvmppc_get_ctr(vcpu);
1059         regs->lr = kvmppc_get_lr(vcpu);
1060         regs->xer = kvmppc_get_xer(vcpu);
1061         regs->msr = vcpu->arch.shared->msr;
1062         regs->srr0 = vcpu->arch.srr0;
1063         regs->srr1 = vcpu->arch.srr1;
1064         regs->pid = vcpu->arch.pid;
1065         regs->sprg0 = vcpu->arch.sprg0;
1066         regs->sprg1 = vcpu->arch.sprg1;
1067         regs->sprg2 = vcpu->arch.sprg2;
1068         regs->sprg3 = vcpu->arch.sprg3;
1069         regs->sprg5 = vcpu->arch.sprg4;
1070         regs->sprg6 = vcpu->arch.sprg5;
1071         regs->sprg7 = vcpu->arch.sprg6;
1072
1073         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1074                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1075
1076         return 0;
1077 }
1078
1079 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1080 {
1081         int i;
1082
1083         kvmppc_set_pc(vcpu, regs->pc);
1084         kvmppc_set_cr(vcpu, regs->cr);
1085         kvmppc_set_ctr(vcpu, regs->ctr);
1086         kvmppc_set_lr(vcpu, regs->lr);
1087         kvmppc_set_xer(vcpu, regs->xer);
1088         kvmppc_set_msr(vcpu, regs->msr);
1089         vcpu->arch.srr0 = regs->srr0;
1090         vcpu->arch.srr1 = regs->srr1;
1091         vcpu->arch.sprg0 = regs->sprg0;
1092         vcpu->arch.sprg1 = regs->sprg1;
1093         vcpu->arch.sprg2 = regs->sprg2;
1094         vcpu->arch.sprg3 = regs->sprg3;
1095         vcpu->arch.sprg5 = regs->sprg4;
1096         vcpu->arch.sprg6 = regs->sprg5;
1097         vcpu->arch.sprg7 = regs->sprg6;
1098
1099         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1100                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1101
1102         return 0;
1103 }
1104
1105 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1106                                   struct kvm_sregs *sregs)
1107 {
1108         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1109         int i;
1110
1111         sregs->pvr = vcpu->arch.pvr;
1112
1113         sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
1114         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1115                 for (i = 0; i < 64; i++) {
1116                         sregs->u.s.ppc64.slb[i].slbe = vcpu3s->slb[i].orige | i;
1117                         sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv;
1118                 }
1119         } else {
1120                 for (i = 0; i < 16; i++) {
1121                         sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
1122                         sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
1123                 }
1124                 for (i = 0; i < 8; i++) {
1125                         sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
1126                         sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
1127                 }
1128         }
1129
1130         return 0;
1131 }
1132
1133 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1134                                   struct kvm_sregs *sregs)
1135 {
1136         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1137         int i;
1138
1139         kvmppc_set_pvr(vcpu, sregs->pvr);
1140
1141         vcpu3s->sdr1 = sregs->u.s.sdr1;
1142         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1143                 for (i = 0; i < 64; i++) {
1144                         vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
1145                                                     sregs->u.s.ppc64.slb[i].slbe);
1146                 }
1147         } else {
1148                 for (i = 0; i < 16; i++) {
1149                         vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
1150                 }
1151                 for (i = 0; i < 8; i++) {
1152                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
1153                                        (u32)sregs->u.s.ppc32.ibat[i]);
1154                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
1155                                        (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
1156                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
1157                                        (u32)sregs->u.s.ppc32.dbat[i]);
1158                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
1159                                        (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
1160                 }
1161         }
1162
1163         /* Flush the MMU after messing with the segments */
1164         kvmppc_mmu_pte_flush(vcpu, 0, 0);
1165
1166         return 0;
1167 }
1168
1169 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1170 {
1171         return -ENOTSUPP;
1172 }
1173
1174 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1175 {
1176         return -ENOTSUPP;
1177 }
1178
1179 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1180                                   struct kvm_translation *tr)
1181 {
1182         return 0;
1183 }
1184
1185 /*
1186  * Get (and clear) the dirty memory log for a memory slot.
1187  */
1188 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1189                                       struct kvm_dirty_log *log)
1190 {
1191         struct kvm_memory_slot *memslot;
1192         struct kvm_vcpu *vcpu;
1193         ulong ga, ga_end;
1194         int is_dirty = 0;
1195         int r;
1196         unsigned long n;
1197
1198         mutex_lock(&kvm->slots_lock);
1199
1200         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1201         if (r)
1202                 goto out;
1203
1204         /* If nothing is dirty, don't bother messing with page tables. */
1205         if (is_dirty) {
1206                 memslot = &kvm->memslots->memslots[log->slot];
1207
1208                 ga = memslot->base_gfn << PAGE_SHIFT;
1209                 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1210
1211                 kvm_for_each_vcpu(n, vcpu, kvm)
1212                         kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1213
1214                 n = kvm_dirty_bitmap_bytes(memslot);
1215                 memset(memslot->dirty_bitmap, 0, n);
1216         }
1217
1218         r = 0;
1219 out:
1220         mutex_unlock(&kvm->slots_lock);
1221         return r;
1222 }
1223
1224 int kvmppc_core_check_processor_compat(void)
1225 {
1226         return 0;
1227 }
1228
1229 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
1230 {
1231         struct kvmppc_vcpu_book3s *vcpu_book3s;
1232         struct kvm_vcpu *vcpu;
1233         int err = -ENOMEM;
1234
1235         vcpu_book3s = vmalloc(sizeof(struct kvmppc_vcpu_book3s));
1236         if (!vcpu_book3s)
1237                 goto out;
1238
1239         memset(vcpu_book3s, 0, sizeof(struct kvmppc_vcpu_book3s));
1240
1241         vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *)
1242                 kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
1243         if (!vcpu_book3s->shadow_vcpu)
1244                 goto free_vcpu;
1245
1246         vcpu = &vcpu_book3s->vcpu;
1247         err = kvm_vcpu_init(vcpu, kvm, id);
1248         if (err)
1249                 goto free_shadow_vcpu;
1250
1251         vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
1252         if (!vcpu->arch.shared)
1253                 goto uninit_vcpu;
1254
1255         vcpu->arch.host_retip = kvm_return_point;
1256         vcpu->arch.host_msr = mfmsr();
1257 #ifdef CONFIG_PPC_BOOK3S_64
1258         /* default to book3s_64 (970fx) */
1259         vcpu->arch.pvr = 0x3C0301;
1260 #else
1261         /* default to book3s_32 (750) */
1262         vcpu->arch.pvr = 0x84202;
1263 #endif
1264         kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
1265         vcpu_book3s->slb_nr = 64;
1266
1267         /* remember where some real-mode handlers are */
1268         vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem;
1269         vcpu->arch.trampoline_enter = kvmppc_trampoline_enter;
1270         vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
1271 #ifdef CONFIG_PPC_BOOK3S_64
1272         vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall;
1273 #else
1274         vcpu->arch.rmcall = (ulong)kvmppc_rmcall;
1275 #endif
1276
1277         vcpu->arch.shadow_msr = MSR_USER64;
1278
1279         err = kvmppc_mmu_init(vcpu);
1280         if (err < 0)
1281                 goto uninit_vcpu;
1282
1283         return vcpu;
1284
1285 uninit_vcpu:
1286         kvm_vcpu_uninit(vcpu);
1287 free_shadow_vcpu:
1288         kfree(vcpu_book3s->shadow_vcpu);
1289 free_vcpu:
1290         vfree(vcpu_book3s);
1291 out:
1292         return ERR_PTR(err);
1293 }
1294
1295 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
1296 {
1297         struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1298
1299         free_page((unsigned long)vcpu->arch.shared);
1300         kvm_vcpu_uninit(vcpu);
1301         kfree(vcpu_book3s->shadow_vcpu);
1302         vfree(vcpu_book3s);
1303 }
1304
1305 extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
1306 int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1307 {
1308         int ret;
1309         double fpr[32][TS_FPRWIDTH];
1310         unsigned int fpscr;
1311         int fpexc_mode;
1312 #ifdef CONFIG_ALTIVEC
1313         vector128 vr[32];
1314         vector128 vscr;
1315         unsigned long uninitialized_var(vrsave);
1316         int used_vr;
1317 #endif
1318 #ifdef CONFIG_VSX
1319         int used_vsr;
1320 #endif
1321         ulong ext_msr;
1322
1323         /* No need to go into the guest when all we do is going out */
1324         if (signal_pending(current)) {
1325                 kvm_run->exit_reason = KVM_EXIT_INTR;
1326                 return -EINTR;
1327         }
1328
1329         /* Save FPU state in stack */
1330         if (current->thread.regs->msr & MSR_FP)
1331                 giveup_fpu(current);
1332         memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
1333         fpscr = current->thread.fpscr.val;
1334         fpexc_mode = current->thread.fpexc_mode;
1335
1336 #ifdef CONFIG_ALTIVEC
1337         /* Save Altivec state in stack */
1338         used_vr = current->thread.used_vr;
1339         if (used_vr) {
1340                 if (current->thread.regs->msr & MSR_VEC)
1341                         giveup_altivec(current);
1342                 memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
1343                 vscr = current->thread.vscr;
1344                 vrsave = current->thread.vrsave;
1345         }
1346 #endif
1347
1348 #ifdef CONFIG_VSX
1349         /* Save VSX state in stack */
1350         used_vsr = current->thread.used_vsr;
1351         if (used_vsr && (current->thread.regs->msr & MSR_VSX))
1352                         __giveup_vsx(current);
1353 #endif
1354
1355         /* Remember the MSR with disabled extensions */
1356         ext_msr = current->thread.regs->msr;
1357
1358         /* XXX we get called with irq disabled - change that! */
1359         local_irq_enable();
1360
1361         /* Preload FPU if it's enabled */
1362         if (vcpu->arch.shared->msr & MSR_FP)
1363                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1364
1365         ret = __kvmppc_vcpu_entry(kvm_run, vcpu);
1366
1367         local_irq_disable();
1368
1369         current->thread.regs->msr = ext_msr;
1370
1371         /* Make sure we save the guest FPU/Altivec/VSX state */
1372         kvmppc_giveup_ext(vcpu, MSR_FP);
1373         kvmppc_giveup_ext(vcpu, MSR_VEC);
1374         kvmppc_giveup_ext(vcpu, MSR_VSX);
1375
1376         /* Restore FPU state from stack */
1377         memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
1378         current->thread.fpscr.val = fpscr;
1379         current->thread.fpexc_mode = fpexc_mode;
1380
1381 #ifdef CONFIG_ALTIVEC
1382         /* Restore Altivec state from stack */
1383         if (used_vr && current->thread.used_vr) {
1384                 memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
1385                 current->thread.vscr = vscr;
1386                 current->thread.vrsave = vrsave;
1387         }
1388         current->thread.used_vr = used_vr;
1389 #endif
1390
1391 #ifdef CONFIG_VSX
1392         current->thread.used_vsr = used_vsr;
1393 #endif
1394
1395         return ret;
1396 }
1397
1398 static int kvmppc_book3s_init(void)
1399 {
1400         int r;
1401
1402         r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0,
1403                      THIS_MODULE);
1404
1405         if (r)
1406                 return r;
1407
1408         r = kvmppc_mmu_hpte_sysinit();
1409
1410         return r;
1411 }
1412
1413 static void kvmppc_book3s_exit(void)
1414 {
1415         kvmppc_mmu_hpte_sysexit();
1416         kvm_exit();
1417 }
1418
1419 module_init(kvmppc_book3s_init);
1420 module_exit(kvmppc_book3s_exit);