git.oblomov.eu Git - linux-2.6/blob - arch/powerpc/kvm/booke.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright IBM Corp. 2007
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
  19  */
  20
  21 #include <linux/errno.h>
  22 #include <linux/err.h>
  23 #include <linux/kvm_host.h>
  24 #include <linux/module.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/fs.h>
  27
  28 #include <asm/cputable.h>
  29 #include <asm/uaccess.h>
  30 #include <asm/kvm_ppc.h>
  31 #include "timing.h"
  32 #include <asm/cacheflush.h>
  33 #include <asm/kvm_44x.h>
  34
  35 #include "booke.h"
  36 #include "44x_tlb.h"
  37
  38 unsigned long kvmppc_booke_handlers;
  39
  40 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
  41 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  42
  43 struct kvm_stats_debugfs_item debugfs_entries[] = {
  44         { "mmio",       VCPU_STAT(mmio_exits) },
  45         { "dcr",        VCPU_STAT(dcr_exits) },
  46         { "sig",        VCPU_STAT(signal_exits) },
  47         { "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
  48         { "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
  49         { "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
  50         { "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
  51         { "sysc",       VCPU_STAT(syscall_exits) },
  52         { "isi",        VCPU_STAT(isi_exits) },
  53         { "dsi",        VCPU_STAT(dsi_exits) },
  54         { "inst_emu",   VCPU_STAT(emulated_inst_exits) },
  55         { "dec",        VCPU_STAT(dec_exits) },
  56         { "ext_intr",   VCPU_STAT(ext_intr_exits) },
  57         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  58         { NULL }
  59 };
  60
  61 /* TODO: use vcpu_printf() */
  62 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
  63 {
  64         int i;
  65
  66         printk("pc:   %08lx msr:  %08lx\n", vcpu->arch.pc, vcpu->arch.msr);
  67         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
  68         printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1);
  69
  70         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  71
  72         for (i = 0; i < 32; i += 4) {
  73                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  74                        vcpu->arch.gpr[i],
  75                        vcpu->arch.gpr[i+1],
  76                        vcpu->arch.gpr[i+2],
  77                        vcpu->arch.gpr[i+3]);
  78         }
  79 }
  80
  81 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
  82                                        unsigned int priority)
  83 {
  84         set_bit(priority, &vcpu->arch.pending_exceptions);
  85 }
  86
  87 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
  88 {
  89         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
  90 }
  91
  92 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
  93 {
  94         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
  95 }
  96
  97 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
  98 {
  99         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 100 }
 101
 102 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 103                                 struct kvm_interrupt *irq)
 104 {
 105         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
 106 }
 107
 108 /* Deliver the interrupt of the corresponding priority, if possible. */
 109 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 110                                         unsigned int priority)
 111 {
 112         int allowed = 0;
 113         ulong msr_mask;
 114
 115         switch (priority) {
 116         case BOOKE_IRQPRIO_PROGRAM:
 117         case BOOKE_IRQPRIO_DTLB_MISS:
 118         case BOOKE_IRQPRIO_ITLB_MISS:
 119         case BOOKE_IRQPRIO_SYSCALL:
 120         case BOOKE_IRQPRIO_DATA_STORAGE:
 121         case BOOKE_IRQPRIO_INST_STORAGE:
 122         case BOOKE_IRQPRIO_FP_UNAVAIL:
 123         case BOOKE_IRQPRIO_AP_UNAVAIL:
 124         case BOOKE_IRQPRIO_ALIGNMENT:
 125                 allowed = 1;
 126                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 127                 break;
 128         case BOOKE_IRQPRIO_CRITICAL:
 129         case BOOKE_IRQPRIO_WATCHDOG:
 130                 allowed = vcpu->arch.msr & MSR_CE;
 131                 msr_mask = MSR_ME;
 132                 break;
 133         case BOOKE_IRQPRIO_MACHINE_CHECK:
 134                 allowed = vcpu->arch.msr & MSR_ME;
 135                 msr_mask = 0;
 136                 break;
 137         case BOOKE_IRQPRIO_EXTERNAL:
 138         case BOOKE_IRQPRIO_DECREMENTER:
 139         case BOOKE_IRQPRIO_FIT:
 140                 allowed = vcpu->arch.msr & MSR_EE;
 141                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 142                 break;
 143         case BOOKE_IRQPRIO_DEBUG:
 144                 allowed = vcpu->arch.msr & MSR_DE;
 145                 msr_mask = MSR_ME;
 146                 break;
 147         }
 148
 149         if (allowed) {
 150                 vcpu->arch.srr0 = vcpu->arch.pc;
 151                 vcpu->arch.srr1 = vcpu->arch.msr;
 152                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 153                 kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
 154
 155                 clear_bit(priority, &vcpu->arch.pending_exceptions);
 156         }
 157
 158         return allowed;
 159 }
 160
 161 /* Check pending exceptions and deliver one, if possible. */
 162 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 163 {
 164         unsigned long *pending = &vcpu->arch.pending_exceptions;
 165         unsigned int priority;
 166
 167         priority = __ffs(*pending);
 168         while (priority <= BOOKE_MAX_INTERRUPT) {
 169                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 170                         break;
 171
 172                 priority = find_next_bit(pending,
 173                                          BITS_PER_BYTE * sizeof(*pending),
 174                                          priority + 1);
 175         }
 176 }
 177
 178 /**
 179  * kvmppc_handle_exit
 180  *
 181  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 182  */
 183 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 184                        unsigned int exit_nr)
 185 {
 186         enum emulation_result er;
 187         int r = RESUME_HOST;
 188
 189         /* update before a new last_exit_type is rewritten */
 190         kvmppc_update_timing_stats(vcpu);
 191
 192         local_irq_enable();
 193
 194         run->exit_reason = KVM_EXIT_UNKNOWN;
 195         run->ready_for_interrupt_injection = 1;
 196
 197         switch (exit_nr) {
 198         case BOOKE_INTERRUPT_MACHINE_CHECK:
 199                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 200                 kvmppc_dump_vcpu(vcpu);
 201                 r = RESUME_HOST;
 202                 break;
 203
 204         case BOOKE_INTERRUPT_EXTERNAL:
 205                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 206                 if (need_resched())
 207                         cond_resched();
 208                 r = RESUME_GUEST;
 209                 break;
 210
 211         case BOOKE_INTERRUPT_DECREMENTER:
 212                 /* Since we switched IVPR back to the host's value, the host
 213                  * handled this interrupt the moment we enabled interrupts.
 214                  * Now we just offer it a chance to reschedule the guest. */
 215                 kvmppc_account_exit(vcpu, DEC_EXITS);
 216                 if (need_resched())
 217                         cond_resched();
 218                 r = RESUME_GUEST;
 219                 break;
 220
 221         case BOOKE_INTERRUPT_PROGRAM:
 222                 if (vcpu->arch.msr & MSR_PR) {
 223                         /* Program traps generated by user-level software must be handled
 224                          * by the guest kernel. */
 225                         vcpu->arch.esr = vcpu->arch.fault_esr;
 226                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 227                         r = RESUME_GUEST;
 228                         kvmppc_account_exit(vcpu, USR_PR_INST);
 229                         break;
 230                 }
 231
 232                 er = kvmppc_emulate_instruction(run, vcpu);
 233                 switch (er) {
 234                 case EMULATE_DONE:
 235                         /* don't overwrite subtypes, just account kvm_stats */
 236                         kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 237                         /* Future optimization: only reload non-volatiles if
 238                          * they were actually modified by emulation. */
 239                         r = RESUME_GUEST_NV;
 240                         break;
 241                 case EMULATE_DO_DCR:
 242                         run->exit_reason = KVM_EXIT_DCR;
 243                         r = RESUME_HOST;
 244                         break;
 245                 case EMULATE_FAIL:
 246                         /* XXX Deliver Program interrupt to guest. */
 247                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 248                                __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 249                         /* For debugging, encode the failing instruction and
 250                          * report it to userspace. */
 251                         run->hw.hardware_exit_reason = ~0ULL << 32;
 252                         run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 253                         r = RESUME_HOST;
 254                         break;
 255                 default:
 256                         BUG();
 257                 }
 258                 break;
 259
 260         case BOOKE_INTERRUPT_FP_UNAVAIL:
 261                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 262                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 263                 r = RESUME_GUEST;
 264                 break;
 265
 266         case BOOKE_INTERRUPT_DATA_STORAGE:
 267                 vcpu->arch.dear = vcpu->arch.fault_dear;
 268                 vcpu->arch.esr = vcpu->arch.fault_esr;
 269                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 270                 kvmppc_account_exit(vcpu, DSI_EXITS);
 271                 r = RESUME_GUEST;
 272                 break;
 273
 274         case BOOKE_INTERRUPT_INST_STORAGE:
 275                 vcpu->arch.esr = vcpu->arch.fault_esr;
 276                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 277                 kvmppc_account_exit(vcpu, ISI_EXITS);
 278                 r = RESUME_GUEST;
 279                 break;
 280
 281         case BOOKE_INTERRUPT_SYSCALL:
 282                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 283                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 284                 r = RESUME_GUEST;
 285                 break;
 286
 287         /* XXX move to a 440-specific file. */
 288         case BOOKE_INTERRUPT_DTLB_MISS: {
 289                 struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
 290                 struct kvmppc_44x_tlbe *gtlbe;
 291                 unsigned long eaddr = vcpu->arch.fault_dear;
 292                 int gtlb_index;
 293                 gfn_t gfn;
 294
 295                 /* Check the guest TLB. */
 296                 gtlb_index = kvmppc_44x_dtlb_index(vcpu, eaddr);
 297                 if (gtlb_index < 0) {
 298                         /* The guest didn't have a mapping for it. */
 299                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
 300                         vcpu->arch.dear = vcpu->arch.fault_dear;
 301                         vcpu->arch.esr = vcpu->arch.fault_esr;
 302                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 303                         r = RESUME_GUEST;
 304                         break;
 305                 }
 306
 307                 gtlbe = &vcpu_44x->guest_tlb[gtlb_index];
 308                 vcpu->arch.paddr_accessed = tlb_xlate(gtlbe, eaddr);
 309                 gfn = vcpu->arch.paddr_accessed >> PAGE_SHIFT;
 310
 311                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 312                         /* The guest TLB had a mapping, but the shadow TLB
 313                          * didn't, and it is RAM. This could be because:
 314                          * a) the entry is mapping the host kernel, or
 315                          * b) the guest used a large mapping which we're faking
 316                          * Either way, we need to satisfy the fault without
 317                          * invoking the guest. */
 318                         kvmppc_mmu_map(vcpu, eaddr, vcpu->arch.paddr_accessed, gtlbe->tid,
 319                                        gtlbe->word2, get_tlb_bytes(gtlbe), gtlb_index);
 320                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 321                         r = RESUME_GUEST;
 322                 } else {
 323                         /* Guest has mapped and accessed a page which is not
 324                          * actually RAM. */
 325                         r = kvmppc_emulate_mmio(run, vcpu);
 326                         kvmppc_account_exit(vcpu, MMIO_EXITS);
 327                 }
 328
 329                 break;
 330         }
 331
 332         /* XXX move to a 440-specific file. */
 333         case BOOKE_INTERRUPT_ITLB_MISS: {
 334                 struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
 335                 struct kvmppc_44x_tlbe *gtlbe;
 336                 unsigned long eaddr = vcpu->arch.pc;
 337                 gpa_t gpaddr;
 338                 gfn_t gfn;
 339                 int gtlb_index;
 340
 341                 r = RESUME_GUEST;
 342
 343                 /* Check the guest TLB. */
 344                 gtlb_index = kvmppc_44x_itlb_index(vcpu, eaddr);
 345                 if (gtlb_index < 0) {
 346                         /* The guest didn't have a mapping for it. */
 347                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 348                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 349                         break;
 350                 }
 351
 352                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 353
 354                 gtlbe = &vcpu_44x->guest_tlb[gtlb_index];
 355                 gpaddr = tlb_xlate(gtlbe, eaddr);
 356                 gfn = gpaddr >> PAGE_SHIFT;
 357
 358                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 359                         /* The guest TLB had a mapping, but the shadow TLB
 360                          * didn't. This could be because:
 361                          * a) the entry is mapping the host kernel, or
 362                          * b) the guest used a large mapping which we're faking
 363                          * Either way, we need to satisfy the fault without
 364                          * invoking the guest. */
 365                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlbe->tid,
 366                                        gtlbe->word2, get_tlb_bytes(gtlbe), gtlb_index);
 367                 } else {
 368                         /* Guest mapped and leaped at non-RAM! */
 369                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 370                 }
 371
 372                 break;
 373         }
 374
 375         case BOOKE_INTERRUPT_DEBUG: {
 376                 u32 dbsr;
 377
 378                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 379
 380                 /* clear IAC events in DBSR register */
 381                 dbsr = mfspr(SPRN_DBSR);
 382                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 383                 mtspr(SPRN_DBSR, dbsr);
 384
 385                 run->exit_reason = KVM_EXIT_DEBUG;
 386                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
 387                 r = RESUME_HOST;
 388                 break;
 389         }
 390
 391         default:
 392                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 393                 BUG();
 394         }
 395
 396         local_irq_disable();
 397
 398         kvmppc_core_deliver_interrupts(vcpu);
 399
 400         if (!(r & RESUME_HOST)) {
 401                 /* To avoid clobbering exit_reason, only check for signals if
 402                  * we aren't already exiting to userspace for some other
 403                  * reason. */
 404                 if (signal_pending(current)) {
 405                         run->exit_reason = KVM_EXIT_INTR;
 406                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 407                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 408                 }
 409         }
 410
 411         return r;
 412 }
 413
 414 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 415 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 416 {
 417         vcpu->arch.pc = 0;
 418         vcpu->arch.msr = 0;
 419         vcpu->arch.gpr[1] = (16<<20) - 8; /* -8 for the callee-save LR slot */
 420
 421         vcpu->arch.shadow_pid = 1;
 422
 423         /* Eye-catching number so we know if the guest takes an interrupt
 424          * before it's programmed its own IVPR. */
 425         vcpu->arch.ivpr = 0x55550000;
 426
 427         kvmppc_init_timing_stats(vcpu);
 428
 429         return kvmppc_core_vcpu_setup(vcpu);
 430 }
 431
 432 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 433 {
 434         int i;
 435
 436         regs->pc = vcpu->arch.pc;
 437         regs->cr = vcpu->arch.cr;
 438         regs->ctr = vcpu->arch.ctr;
 439         regs->lr = vcpu->arch.lr;
 440         regs->xer = vcpu->arch.xer;
 441         regs->msr = vcpu->arch.msr;
 442         regs->srr0 = vcpu->arch.srr0;
 443         regs->srr1 = vcpu->arch.srr1;
 444         regs->pid = vcpu->arch.pid;
 445         regs->sprg0 = vcpu->arch.sprg0;
 446         regs->sprg1 = vcpu->arch.sprg1;
 447         regs->sprg2 = vcpu->arch.sprg2;
 448         regs->sprg3 = vcpu->arch.sprg3;
 449         regs->sprg5 = vcpu->arch.sprg4;
 450         regs->sprg6 = vcpu->arch.sprg5;
 451         regs->sprg7 = vcpu->arch.sprg6;
 452
 453         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 454                 regs->gpr[i] = vcpu->arch.gpr[i];
 455
 456         return 0;
 457 }
 458
 459 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 460 {
 461         int i;
 462
 463         vcpu->arch.pc = regs->pc;
 464         vcpu->arch.cr = regs->cr;
 465         vcpu->arch.ctr = regs->ctr;
 466         vcpu->arch.lr = regs->lr;
 467         vcpu->arch.xer = regs->xer;
 468         kvmppc_set_msr(vcpu, regs->msr);
 469         vcpu->arch.srr0 = regs->srr0;
 470         vcpu->arch.srr1 = regs->srr1;
 471         vcpu->arch.sprg0 = regs->sprg0;
 472         vcpu->arch.sprg1 = regs->sprg1;
 473         vcpu->arch.sprg2 = regs->sprg2;
 474         vcpu->arch.sprg3 = regs->sprg3;
 475         vcpu->arch.sprg5 = regs->sprg4;
 476         vcpu->arch.sprg6 = regs->sprg5;
 477         vcpu->arch.sprg7 = regs->sprg6;
 478
 479         for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
 480                 vcpu->arch.gpr[i] = regs->gpr[i];
 481
 482         return 0;
 483 }
 484
 485 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 486                                   struct kvm_sregs *sregs)
 487 {
 488         return -ENOTSUPP;
 489 }
 490
 491 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 492                                   struct kvm_sregs *sregs)
 493 {
 494         return -ENOTSUPP;
 495 }
 496
 497 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 498 {
 499         return -ENOTSUPP;
 500 }
 501
 502 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 503 {
 504         return -ENOTSUPP;
 505 }
 506
 507 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 508                                   struct kvm_translation *tr)
 509 {
 510         return kvmppc_core_vcpu_translate(vcpu, tr);
 511 }
 512
 513 int kvmppc_booke_init(void)
 514 {
 515         unsigned long ivor[16];
 516         unsigned long max_ivor = 0;
 517         int i;
 518
 519         /* We install our own exception handlers by hijacking IVPR. IVPR must
 520          * be 16-bit aligned, so we need a 64KB allocation. */
 521         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
 522                                                  VCPU_SIZE_ORDER);
 523         if (!kvmppc_booke_handlers)
 524                 return -ENOMEM;
 525
 526         /* XXX make sure our handlers are smaller than Linux's */
 527
 528         /* Copy our interrupt handlers to match host IVORs. That way we don't
 529          * have to swap the IVORs on every guest/host transition. */
 530         ivor[0] = mfspr(SPRN_IVOR0);
 531         ivor[1] = mfspr(SPRN_IVOR1);
 532         ivor[2] = mfspr(SPRN_IVOR2);
 533         ivor[3] = mfspr(SPRN_IVOR3);
 534         ivor[4] = mfspr(SPRN_IVOR4);
 535         ivor[5] = mfspr(SPRN_IVOR5);
 536         ivor[6] = mfspr(SPRN_IVOR6);
 537         ivor[7] = mfspr(SPRN_IVOR7);
 538         ivor[8] = mfspr(SPRN_IVOR8);
 539         ivor[9] = mfspr(SPRN_IVOR9);
 540         ivor[10] = mfspr(SPRN_IVOR10);
 541         ivor[11] = mfspr(SPRN_IVOR11);
 542         ivor[12] = mfspr(SPRN_IVOR12);
 543         ivor[13] = mfspr(SPRN_IVOR13);
 544         ivor[14] = mfspr(SPRN_IVOR14);
 545         ivor[15] = mfspr(SPRN_IVOR15);
 546
 547         for (i = 0; i < 16; i++) {
 548                 if (ivor[i] > max_ivor)
 549                         max_ivor = ivor[i];
 550
 551                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
 552                        kvmppc_handlers_start + i * kvmppc_handler_len,
 553                        kvmppc_handler_len);
 554         }
 555         flush_icache_range(kvmppc_booke_handlers,
 556                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 557
 558         return 0;
 559 }
 560
 561 void __exit kvmppc_booke_exit(void)
 562 {
 563         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
 564         kvm_exit();
 565 }