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 #include <asm/cputable.h>
  28 #include <asm/uaccess.h>
  29 #include <asm/kvm_ppc.h>
  30 #include <asm/cacheflush.h>
  31
  32 #include "booke.h"
  33 #include "44x_tlb.h"
  34
  35 unsigned long kvmppc_booke_handlers;
  36
  37 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
  38 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  39
  40 struct kvm_stats_debugfs_item debugfs_entries[] = {
  41         { "mmio",       VCPU_STAT(mmio_exits) },
  42         { "dcr",        VCPU_STAT(dcr_exits) },
  43         { "sig",        VCPU_STAT(signal_exits) },
  44         { "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
  45         { "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
  46         { "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
  47         { "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
  48         { "sysc",       VCPU_STAT(syscall_exits) },
  49         { "isi",        VCPU_STAT(isi_exits) },
  50         { "dsi",        VCPU_STAT(dsi_exits) },
  51         { "inst_emu",   VCPU_STAT(emulated_inst_exits) },
  52         { "dec",        VCPU_STAT(dec_exits) },
  53         { "ext_intr",   VCPU_STAT(ext_intr_exits) },
  54         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  55         { NULL }
  56 };
  57
  58 /* TODO: use vcpu_printf() */
  59 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
  60 {
  61         int i;
  62
  63         printk("pc:   %08lx msr:  %08lx\n", vcpu->arch.pc, vcpu->arch.msr);
  64         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
  65         printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1);
  66
  67         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  68
  69         for (i = 0; i < 32; i += 4) {
  70                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  71                        vcpu->arch.gpr[i],
  72                        vcpu->arch.gpr[i+1],
  73                        vcpu->arch.gpr[i+2],
  74                        vcpu->arch.gpr[i+3]);
  75         }
  76 }
  77
  78 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
  79                                        unsigned int priority)
  80 {
  81         set_bit(priority, &vcpu->arch.pending_exceptions);
  82 }
  83
  84 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
  85 {
  86         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
  87 }
  88
  89 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
  90 {
  91         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
  92 }
  93
  94 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
  95 {
  96         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
  97 }
  98
  99 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 100                                 struct kvm_interrupt *irq)
 101 {
 102         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
 103 }
 104
 105 /* Deliver the interrupt of the corresponding priority, if possible. */
 106 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 107                                         unsigned int priority)
 108 {
 109         int allowed = 0;
 110         ulong msr_mask;
 111
 112         switch (priority) {
 113         case BOOKE_IRQPRIO_PROGRAM:
 114         case BOOKE_IRQPRIO_DTLB_MISS:
 115         case BOOKE_IRQPRIO_ITLB_MISS:
 116         case BOOKE_IRQPRIO_SYSCALL:
 117         case BOOKE_IRQPRIO_DATA_STORAGE:
 118         case BOOKE_IRQPRIO_INST_STORAGE:
 119         case BOOKE_IRQPRIO_FP_UNAVAIL:
 120         case BOOKE_IRQPRIO_AP_UNAVAIL:
 121         case BOOKE_IRQPRIO_ALIGNMENT:
 122                 allowed = 1;
 123                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 124                 break;
 125         case BOOKE_IRQPRIO_CRITICAL:
 126         case BOOKE_IRQPRIO_WATCHDOG:
 127                 allowed = vcpu->arch.msr & MSR_CE;
 128                 msr_mask = MSR_ME;
 129                 break;
 130         case BOOKE_IRQPRIO_MACHINE_CHECK:
 131                 allowed = vcpu->arch.msr & MSR_ME;
 132                 msr_mask = 0;
 133                 break;
 134         case BOOKE_IRQPRIO_EXTERNAL:
 135         case BOOKE_IRQPRIO_DECREMENTER:
 136         case BOOKE_IRQPRIO_FIT:
 137                 allowed = vcpu->arch.msr & MSR_EE;
 138                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 139                 break;
 140         case BOOKE_IRQPRIO_DEBUG:
 141                 allowed = vcpu->arch.msr & MSR_DE;
 142                 msr_mask = MSR_ME;
 143                 break;
 144         }
 145
 146         if (allowed) {
 147                 vcpu->arch.srr0 = vcpu->arch.pc;
 148                 vcpu->arch.srr1 = vcpu->arch.msr;
 149                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 150                 kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
 151
 152                 clear_bit(priority, &vcpu->arch.pending_exceptions);
 153         }
 154
 155         return allowed;
 156 }
 157
 158 /* Check pending exceptions and deliver one, if possible. */
 159 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 160 {
 161         unsigned long *pending = &vcpu->arch.pending_exceptions;
 162         unsigned int priority;
 163
 164         priority = __ffs(*pending);
 165         while (priority <= BOOKE_MAX_INTERRUPT) {
 166                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 167                         break;
 168
 169                 priority = find_next_bit(pending,
 170                                          BITS_PER_BYTE * sizeof(*pending),
 171                                          priority + 1);
 172         }
 173 }
 174
 175 /**
 176  * kvmppc_handle_exit
 177  *
 178  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 179  */
 180 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 181                        unsigned int exit_nr)
 182 {
 183         enum emulation_result er;
 184         int r = RESUME_HOST;
 185
 186         local_irq_enable();
 187
 188         run->exit_reason = KVM_EXIT_UNKNOWN;
 189         run->ready_for_interrupt_injection = 1;
 190
 191         switch (exit_nr) {
 192         case BOOKE_INTERRUPT_MACHINE_CHECK:
 193                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 194                 kvmppc_dump_vcpu(vcpu);
 195                 r = RESUME_HOST;
 196                 break;
 197
 198         case BOOKE_INTERRUPT_EXTERNAL:
 199                 vcpu->stat.ext_intr_exits++;
 200                 if (need_resched())
 201                         cond_resched();
 202                 r = RESUME_GUEST;
 203                 break;
 204
 205         case BOOKE_INTERRUPT_DECREMENTER:
 206                 /* Since we switched IVPR back to the host's value, the host
 207                  * handled this interrupt the moment we enabled interrupts.
 208                  * Now we just offer it a chance to reschedule the guest. */
 209
 210                 /* XXX At this point the TLB still holds our shadow TLB, so if
 211                  * we do reschedule the host will fault over it. Perhaps we
 212                  * should politely restore the host's entries to minimize
 213                  * misses before ceding control. */
 214                 vcpu->stat.dec_exits++;
 215                 if (need_resched())
 216                         cond_resched();
 217                 r = RESUME_GUEST;
 218                 break;
 219
 220         case BOOKE_INTERRUPT_PROGRAM:
 221                 if (vcpu->arch.msr & MSR_PR) {
 222                         /* Program traps generated by user-level software must be handled
 223                          * by the guest kernel. */
 224                         vcpu->arch.esr = vcpu->arch.fault_esr;
 225                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 226                         r = RESUME_GUEST;
 227                         break;
 228                 }
 229
 230                 er = kvmppc_emulate_instruction(run, vcpu);
 231                 switch (er) {
 232                 case EMULATE_DONE:
 233                         /* Future optimization: only reload non-volatiles if
 234                          * they were actually modified by emulation. */
 235                         vcpu->stat.emulated_inst_exits++;
 236                         r = RESUME_GUEST_NV;
 237                         break;
 238                 case EMULATE_DO_DCR:
 239                         run->exit_reason = KVM_EXIT_DCR;
 240                         vcpu->stat.dcr_exits++;
 241                         r = RESUME_HOST;
 242                         break;
 243                 case EMULATE_FAIL:
 244                         /* XXX Deliver Program interrupt to guest. */
 245                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 246                                __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 247                         /* For debugging, encode the failing instruction and
 248                          * report it to userspace. */
 249                         run->hw.hardware_exit_reason = ~0ULL << 32;
 250                         run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 251                         r = RESUME_HOST;
 252                         break;
 253                 default:
 254                         BUG();
 255                 }
 256                 break;
 257
 258         case BOOKE_INTERRUPT_FP_UNAVAIL:
 259                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 260                 r = RESUME_GUEST;
 261                 break;
 262
 263         case BOOKE_INTERRUPT_DATA_STORAGE:
 264                 vcpu->arch.dear = vcpu->arch.fault_dear;
 265                 vcpu->arch.esr = vcpu->arch.fault_esr;
 266                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 267                 vcpu->stat.dsi_exits++;
 268                 r = RESUME_GUEST;
 269                 break;
 270
 271         case BOOKE_INTERRUPT_INST_STORAGE:
 272                 vcpu->arch.esr = vcpu->arch.fault_esr;
 273                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 274                 vcpu->stat.isi_exits++;
 275                 r = RESUME_GUEST;
 276                 break;
 277
 278         case BOOKE_INTERRUPT_SYSCALL:
 279                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 280                 vcpu->stat.syscall_exits++;
 281                 r = RESUME_GUEST;
 282                 break;
 283
 284         case BOOKE_INTERRUPT_DTLB_MISS: {
 285                 struct kvmppc_44x_tlbe *gtlbe;
 286                 unsigned long eaddr = vcpu->arch.fault_dear;
 287                 gfn_t gfn;
 288
 289                 /* Check the guest TLB. */
 290                 gtlbe = kvmppc_44x_dtlb_search(vcpu, eaddr);
 291                 if (!gtlbe) {
 292                         /* The guest didn't have a mapping for it. */
 293                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
 294                         vcpu->arch.dear = vcpu->arch.fault_dear;
 295                         vcpu->arch.esr = vcpu->arch.fault_esr;
 296                         vcpu->stat.dtlb_real_miss_exits++;
 297                         r = RESUME_GUEST;
 298                         break;
 299                 }
 300
 301                 vcpu->arch.paddr_accessed = tlb_xlate(gtlbe, eaddr);
 302                 gfn = vcpu->arch.paddr_accessed >> PAGE_SHIFT;
 303
 304                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 305                         /* The guest TLB had a mapping, but the shadow TLB
 306                          * didn't, and it is RAM. This could be because:
 307                          * a) the entry is mapping the host kernel, or
 308                          * b) the guest used a large mapping which we're faking
 309                          * Either way, we need to satisfy the fault without
 310                          * invoking the guest. */
 311                         kvmppc_mmu_map(vcpu, eaddr, gfn, gtlbe->tid,
 312                                        gtlbe->word2);
 313                         vcpu->stat.dtlb_virt_miss_exits++;
 314                         r = RESUME_GUEST;
 315                 } else {
 316                         /* Guest has mapped and accessed a page which is not
 317                          * actually RAM. */
 318                         r = kvmppc_emulate_mmio(run, vcpu);
 319                         vcpu->stat.mmio_exits++;
 320                 }
 321
 322                 break;
 323         }
 324
 325         case BOOKE_INTERRUPT_ITLB_MISS: {
 326                 struct kvmppc_44x_tlbe *gtlbe;
 327                 unsigned long eaddr = vcpu->arch.pc;
 328                 gfn_t gfn;
 329
 330                 r = RESUME_GUEST;
 331
 332                 /* Check the guest TLB. */
 333                 gtlbe = kvmppc_44x_itlb_search(vcpu, eaddr);
 334                 if (!gtlbe) {
 335                         /* The guest didn't have a mapping for it. */
 336                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 337                         vcpu->stat.itlb_real_miss_exits++;
 338                         break;
 339                 }
 340
 341                 vcpu->stat.itlb_virt_miss_exits++;
 342
 343                 gfn = tlb_xlate(gtlbe, eaddr) >> PAGE_SHIFT;
 344
 345                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 346                         /* The guest TLB had a mapping, but the shadow TLB
 347                          * didn't. This could be because:
 348                          * a) the entry is mapping the host kernel, or
 349                          * b) the guest used a large mapping which we're faking
 350                          * Either way, we need to satisfy the fault without
 351                          * invoking the guest. */
 352                         kvmppc_mmu_map(vcpu, eaddr, gfn, gtlbe->tid,
 353                                        gtlbe->word2);
 354                 } else {
 355                         /* Guest mapped and leaped at non-RAM! */
 356                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 357                 }
 358
 359                 break;
 360         }
 361
 362         case BOOKE_INTERRUPT_DEBUG: {
 363                 u32 dbsr;
 364
 365                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 366
 367                 /* clear IAC events in DBSR register */
 368                 dbsr = mfspr(SPRN_DBSR);
 369                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 370                 mtspr(SPRN_DBSR, dbsr);
 371
 372                 run->exit_reason = KVM_EXIT_DEBUG;
 373                 r = RESUME_HOST;
 374                 break;
 375         }
 376
 377         default:
 378                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 379                 BUG();
 380         }
 381
 382         local_irq_disable();
 383
 384         kvmppc_core_deliver_interrupts(vcpu);
 385
 386         if (!(r & RESUME_HOST)) {
 387                 /* To avoid clobbering exit_reason, only check for signals if
 388                  * we aren't already exiting to userspace for some other
 389                  * reason. */
 390                 if (signal_pending(current)) {
 391                         run->exit_reason = KVM_EXIT_INTR;
 392                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 393                         vcpu->stat.signal_exits++;
 394                 }
 395         }
 396
 397         return r;
 398 }
 399
 400 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 401 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 402 {
 403         vcpu->arch.pc = 0;
 404         vcpu->arch.msr = 0;
 405         vcpu->arch.gpr[1] = (16<<20) - 8; /* -8 for the callee-save LR slot */
 406
 407         vcpu->arch.shadow_pid = 1;
 408
 409         /* Eye-catching number so we know if the guest takes an interrupt
 410          * before it's programmed its own IVPR. */
 411         vcpu->arch.ivpr = 0x55550000;
 412
 413         return kvmppc_core_vcpu_setup(vcpu);
 414 }
 415
 416 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 417 {
 418         int i;
 419
 420         regs->pc = vcpu->arch.pc;
 421         regs->cr = vcpu->arch.cr;
 422         regs->ctr = vcpu->arch.ctr;
 423         regs->lr = vcpu->arch.lr;
 424         regs->xer = vcpu->arch.xer;
 425         regs->msr = vcpu->arch.msr;
 426         regs->srr0 = vcpu->arch.srr0;
 427         regs->srr1 = vcpu->arch.srr1;
 428         regs->pid = vcpu->arch.pid;
 429         regs->sprg0 = vcpu->arch.sprg0;
 430         regs->sprg1 = vcpu->arch.sprg1;
 431         regs->sprg2 = vcpu->arch.sprg2;
 432         regs->sprg3 = vcpu->arch.sprg3;
 433         regs->sprg5 = vcpu->arch.sprg4;
 434         regs->sprg6 = vcpu->arch.sprg5;
 435         regs->sprg7 = vcpu->arch.sprg6;
 436
 437         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 438                 regs->gpr[i] = vcpu->arch.gpr[i];
 439
 440         return 0;
 441 }
 442
 443 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 444 {
 445         int i;
 446
 447         vcpu->arch.pc = regs->pc;
 448         vcpu->arch.cr = regs->cr;
 449         vcpu->arch.ctr = regs->ctr;
 450         vcpu->arch.lr = regs->lr;
 451         vcpu->arch.xer = regs->xer;
 452         kvmppc_set_msr(vcpu, regs->msr);
 453         vcpu->arch.srr0 = regs->srr0;
 454         vcpu->arch.srr1 = regs->srr1;
 455         vcpu->arch.sprg0 = regs->sprg0;
 456         vcpu->arch.sprg1 = regs->sprg1;
 457         vcpu->arch.sprg2 = regs->sprg2;
 458         vcpu->arch.sprg3 = regs->sprg3;
 459         vcpu->arch.sprg5 = regs->sprg4;
 460         vcpu->arch.sprg6 = regs->sprg5;
 461         vcpu->arch.sprg7 = regs->sprg6;
 462
 463         for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
 464                 vcpu->arch.gpr[i] = regs->gpr[i];
 465
 466         return 0;
 467 }
 468
 469 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 470                                   struct kvm_sregs *sregs)
 471 {
 472         return -ENOTSUPP;
 473 }
 474
 475 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 476                                   struct kvm_sregs *sregs)
 477 {
 478         return -ENOTSUPP;
 479 }
 480
 481 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 482 {
 483         return -ENOTSUPP;
 484 }
 485
 486 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 487 {
 488         return -ENOTSUPP;
 489 }
 490
 491 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 492                                   struct kvm_translation *tr)
 493 {
 494         return kvmppc_core_vcpu_translate(vcpu, tr);
 495 }
 496
 497 int kvmppc_booke_init(void)
 498 {
 499         unsigned long ivor[16];
 500         unsigned long max_ivor = 0;
 501         int i;
 502
 503         /* We install our own exception handlers by hijacking IVPR. IVPR must
 504          * be 16-bit aligned, so we need a 64KB allocation. */
 505         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
 506                                                  VCPU_SIZE_ORDER);
 507         if (!kvmppc_booke_handlers)
 508                 return -ENOMEM;
 509
 510         /* XXX make sure our handlers are smaller than Linux's */
 511
 512         /* Copy our interrupt handlers to match host IVORs. That way we don't
 513          * have to swap the IVORs on every guest/host transition. */
 514         ivor[0] = mfspr(SPRN_IVOR0);
 515         ivor[1] = mfspr(SPRN_IVOR1);
 516         ivor[2] = mfspr(SPRN_IVOR2);
 517         ivor[3] = mfspr(SPRN_IVOR3);
 518         ivor[4] = mfspr(SPRN_IVOR4);
 519         ivor[5] = mfspr(SPRN_IVOR5);
 520         ivor[6] = mfspr(SPRN_IVOR6);
 521         ivor[7] = mfspr(SPRN_IVOR7);
 522         ivor[8] = mfspr(SPRN_IVOR8);
 523         ivor[9] = mfspr(SPRN_IVOR9);
 524         ivor[10] = mfspr(SPRN_IVOR10);
 525         ivor[11] = mfspr(SPRN_IVOR11);
 526         ivor[12] = mfspr(SPRN_IVOR12);
 527         ivor[13] = mfspr(SPRN_IVOR13);
 528         ivor[14] = mfspr(SPRN_IVOR14);
 529         ivor[15] = mfspr(SPRN_IVOR15);
 530
 531         for (i = 0; i < 16; i++) {
 532                 if (ivor[i] > max_ivor)
 533                         max_ivor = ivor[i];
 534
 535                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
 536                        kvmppc_handlers_start + i * kvmppc_handler_len,
 537                        kvmppc_handler_len);
 538         }
 539         flush_icache_range(kvmppc_booke_handlers,
 540                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 541
 542         return 0;
 543 }
 544
 545 void __exit kvmppc_booke_exit(void)
 546 {
 547         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
 548         kvm_exit();
 549 }