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