linux/arch/powerpc/kvm/booke.c
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   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
  34#include "booke.h"
  35
  36unsigned long kvmppc_booke_handlers;
  37
  38#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
  39#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  40
  41struct kvm_stats_debugfs_item debugfs_entries[] = {
  42        { "mmio",       VCPU_STAT(mmio_exits) },
  43        { "dcr",        VCPU_STAT(dcr_exits) },
  44        { "sig",        VCPU_STAT(signal_exits) },
  45        { "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
  46        { "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
  47        { "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
  48        { "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
  49        { "sysc",       VCPU_STAT(syscall_exits) },
  50        { "isi",        VCPU_STAT(isi_exits) },
  51        { "dsi",        VCPU_STAT(dsi_exits) },
  52        { "inst_emu",   VCPU_STAT(emulated_inst_exits) },
  53        { "dec",        VCPU_STAT(dec_exits) },
  54        { "ext_intr",   VCPU_STAT(ext_intr_exits) },
  55        { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  56        { NULL }
  57};
  58
  59/* TODO: use vcpu_printf() */
  60void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
  61{
  62        int i;
  63
  64        printk("pc:   %08lx msr:  %08lx\n", vcpu->arch.pc, vcpu->arch.msr);
  65        printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
  66        printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1);
  67
  68        printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  69
  70        for (i = 0; i < 32; i += 4) {
  71                printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  72                       vcpu->arch.gpr[i],
  73                       vcpu->arch.gpr[i+1],
  74                       vcpu->arch.gpr[i+2],
  75                       vcpu->arch.gpr[i+3]);
  76        }
  77}
  78
  79static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
  80                                       unsigned int priority)
  81{
  82        set_bit(priority, &vcpu->arch.pending_exceptions);
  83}
  84
  85void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
  86{
  87        kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
  88}
  89
  90void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
  91{
  92        kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
  93}
  94
  95int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
  96{
  97        return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
  98}
  99
 100void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 101                                struct kvm_interrupt *irq)
 102{
 103        kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
 104}
 105
 106/* Deliver the interrupt of the corresponding priority, if possible. */
 107static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 108                                        unsigned int priority)
 109{
 110        int allowed = 0;
 111        ulong msr_mask;
 112
 113        switch (priority) {
 114        case BOOKE_IRQPRIO_PROGRAM:
 115        case BOOKE_IRQPRIO_DTLB_MISS:
 116        case BOOKE_IRQPRIO_ITLB_MISS:
 117        case BOOKE_IRQPRIO_SYSCALL:
 118        case BOOKE_IRQPRIO_DATA_STORAGE:
 119        case BOOKE_IRQPRIO_INST_STORAGE:
 120        case BOOKE_IRQPRIO_FP_UNAVAIL:
 121        case BOOKE_IRQPRIO_SPE_UNAVAIL:
 122        case BOOKE_IRQPRIO_SPE_FP_DATA:
 123        case BOOKE_IRQPRIO_SPE_FP_ROUND:
 124        case BOOKE_IRQPRIO_AP_UNAVAIL:
 125        case BOOKE_IRQPRIO_ALIGNMENT:
 126                allowed = 1;
 127                msr_mask = MSR_CE|MSR_ME|MSR_DE;
 128                break;
 129        case BOOKE_IRQPRIO_CRITICAL:
 130        case BOOKE_IRQPRIO_WATCHDOG:
 131                allowed = vcpu->arch.msr & MSR_CE;
 132                msr_mask = MSR_ME;
 133                break;
 134        case BOOKE_IRQPRIO_MACHINE_CHECK:
 135                allowed = vcpu->arch.msr & MSR_ME;
 136                msr_mask = 0;
 137                break;
 138        case BOOKE_IRQPRIO_EXTERNAL:
 139        case BOOKE_IRQPRIO_DECREMENTER:
 140        case BOOKE_IRQPRIO_FIT:
 141                allowed = vcpu->arch.msr & MSR_EE;
 142                msr_mask = MSR_CE|MSR_ME|MSR_DE;
 143                break;
 144        case BOOKE_IRQPRIO_DEBUG:
 145                allowed = vcpu->arch.msr & MSR_DE;
 146                msr_mask = MSR_ME;
 147                break;
 148        }
 149
 150        if (allowed) {
 151                vcpu->arch.srr0 = vcpu->arch.pc;
 152                vcpu->arch.srr1 = vcpu->arch.msr;
 153                vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 154                kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
 155
 156                clear_bit(priority, &vcpu->arch.pending_exceptions);
 157        }
 158
 159        return allowed;
 160}
 161
 162/* Check pending exceptions and deliver one, if possible. */
 163void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 164{
 165        unsigned long *pending = &vcpu->arch.pending_exceptions;
 166        unsigned int priority;
 167
 168        priority = __ffs(*pending);
 169        while (priority <= BOOKE_IRQPRIO_MAX) {
 170                if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 171                        break;
 172
 173                priority = find_next_bit(pending,
 174                                         BITS_PER_BYTE * sizeof(*pending),
 175                                         priority + 1);
 176        }
 177}
 178
 179/**
 180 * kvmppc_handle_exit
 181 *
 182 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 183 */
 184int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 185                       unsigned int exit_nr)
 186{
 187        enum emulation_result er;
 188        int r = RESUME_HOST;
 189
 190        /* update before a new last_exit_type is rewritten */
 191        kvmppc_update_timing_stats(vcpu);
 192
 193        local_irq_enable();
 194
 195        run->exit_reason = KVM_EXIT_UNKNOWN;
 196        run->ready_for_interrupt_injection = 1;
 197
 198        switch (exit_nr) {
 199        case BOOKE_INTERRUPT_MACHINE_CHECK:
 200                printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 201                kvmppc_dump_vcpu(vcpu);
 202                r = RESUME_HOST;
 203                break;
 204
 205        case BOOKE_INTERRUPT_EXTERNAL:
 206                kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 207                if (need_resched())
 208                        cond_resched();
 209                r = RESUME_GUEST;
 210                break;
 211
 212        case BOOKE_INTERRUPT_DECREMENTER:
 213                /* Since we switched IVPR back to the host's value, the host
 214                 * handled this interrupt the moment we enabled interrupts.
 215                 * Now we just offer it a chance to reschedule the guest. */
 216                kvmppc_account_exit(vcpu, DEC_EXITS);
 217                if (need_resched())
 218                        cond_resched();
 219                r = RESUME_GUEST;
 220                break;
 221
 222        case BOOKE_INTERRUPT_PROGRAM:
 223                if (vcpu->arch.msr & MSR_PR) {
 224                        /* Program traps generated by user-level software must be handled
 225                         * by the guest kernel. */
 226                        vcpu->arch.esr = vcpu->arch.fault_esr;
 227                        kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 228                        r = RESUME_GUEST;
 229                        kvmppc_account_exit(vcpu, USR_PR_INST);
 230                        break;
 231                }
 232
 233                er = kvmppc_emulate_instruction(run, vcpu);
 234                switch (er) {
 235                case EMULATE_DONE:
 236                        /* don't overwrite subtypes, just account kvm_stats */
 237                        kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 238                        /* Future optimization: only reload non-volatiles if
 239                         * they were actually modified by emulation. */
 240                        r = RESUME_GUEST_NV;
 241                        break;
 242                case EMULATE_DO_DCR:
 243                        run->exit_reason = KVM_EXIT_DCR;
 244                        r = RESUME_HOST;
 245                        break;
 246                case EMULATE_FAIL:
 247                        /* XXX Deliver Program interrupt to guest. */
 248                        printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 249                               __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 250                        /* For debugging, encode the failing instruction and
 251                         * report it to userspace. */
 252                        run->hw.hardware_exit_reason = ~0ULL << 32;
 253                        run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 254                        r = RESUME_HOST;
 255                        break;
 256                default:
 257                        BUG();
 258                }
 259                break;
 260
 261        case BOOKE_INTERRUPT_FP_UNAVAIL:
 262                kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 263                kvmppc_account_exit(vcpu, FP_UNAVAIL);
 264                r = RESUME_GUEST;
 265                break;
 266
 267        case BOOKE_INTERRUPT_SPE_UNAVAIL:
 268                kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
 269                r = RESUME_GUEST;
 270                break;
 271
 272        case BOOKE_INTERRUPT_SPE_FP_DATA:
 273                kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 274                r = RESUME_GUEST;
 275                break;
 276
 277        case BOOKE_INTERRUPT_SPE_FP_ROUND:
 278                kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 279                r = RESUME_GUEST;
 280                break;
 281
 282        case BOOKE_INTERRUPT_DATA_STORAGE:
 283                vcpu->arch.dear = vcpu->arch.fault_dear;
 284                vcpu->arch.esr = vcpu->arch.fault_esr;
 285                kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 286                kvmppc_account_exit(vcpu, DSI_EXITS);
 287                r = RESUME_GUEST;
 288                break;
 289
 290        case BOOKE_INTERRUPT_INST_STORAGE:
 291                vcpu->arch.esr = vcpu->arch.fault_esr;
 292                kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 293                kvmppc_account_exit(vcpu, ISI_EXITS);
 294                r = RESUME_GUEST;
 295                break;
 296
 297        case BOOKE_INTERRUPT_SYSCALL:
 298                kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 299                kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 300                r = RESUME_GUEST;
 301                break;
 302
 303        case BOOKE_INTERRUPT_DTLB_MISS: {
 304                unsigned long eaddr = vcpu->arch.fault_dear;
 305                int gtlb_index;
 306                gpa_t gpaddr;
 307                gfn_t gfn;
 308
 309                /* Check the guest TLB. */
 310                gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
 311                if (gtlb_index < 0) {
 312                        /* The guest didn't have a mapping for it. */
 313                        kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
 314                        vcpu->arch.dear = vcpu->arch.fault_dear;
 315                        vcpu->arch.esr = vcpu->arch.fault_esr;
 316                        kvmppc_mmu_dtlb_miss(vcpu);
 317                        kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 318                        r = RESUME_GUEST;
 319                        break;
 320                }
 321
 322                gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 323                gfn = gpaddr >> PAGE_SHIFT;
 324
 325                if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 326                        /* The guest TLB had a mapping, but the shadow TLB
 327                         * didn't, and it is RAM. This could be because:
 328                         * a) the entry is mapping the host kernel, or
 329                         * b) the guest used a large mapping which we're faking
 330                         * Either way, we need to satisfy the fault without
 331                         * invoking the guest. */
 332                        kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 333                        kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 334                        r = RESUME_GUEST;
 335                } else {
 336                        /* Guest has mapped and accessed a page which is not
 337                         * actually RAM. */
 338                        vcpu->arch.paddr_accessed = gpaddr;
 339                        r = kvmppc_emulate_mmio(run, vcpu);
 340                        kvmppc_account_exit(vcpu, MMIO_EXITS);
 341                }
 342
 343                break;
 344        }
 345
 346        case BOOKE_INTERRUPT_ITLB_MISS: {
 347                unsigned long eaddr = vcpu->arch.pc;
 348                gpa_t gpaddr;
 349                gfn_t gfn;
 350                int gtlb_index;
 351
 352                r = RESUME_GUEST;
 353
 354                /* Check the guest TLB. */
 355                gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
 356                if (gtlb_index < 0) {
 357                        /* The guest didn't have a mapping for it. */
 358                        kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 359                        kvmppc_mmu_itlb_miss(vcpu);
 360                        kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 361                        break;
 362                }
 363
 364                kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 365
 366                gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 367                gfn = gpaddr >> PAGE_SHIFT;
 368
 369                if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 370                        /* The guest TLB had a mapping, but the shadow TLB
 371                         * didn't. This could be because:
 372                         * a) the entry is mapping the host kernel, or
 373                         * b) the guest used a large mapping which we're faking
 374                         * Either way, we need to satisfy the fault without
 375                         * invoking the guest. */
 376                        kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 377                } else {
 378                        /* Guest mapped and leaped at non-RAM! */
 379                        kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 380                }
 381
 382                break;
 383        }
 384
 385        case BOOKE_INTERRUPT_DEBUG: {
 386                u32 dbsr;
 387
 388                vcpu->arch.pc = mfspr(SPRN_CSRR0);
 389
 390                /* clear IAC events in DBSR register */
 391                dbsr = mfspr(SPRN_DBSR);
 392                dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 393                mtspr(SPRN_DBSR, dbsr);
 394
 395                run->exit_reason = KVM_EXIT_DEBUG;
 396                kvmppc_account_exit(vcpu, DEBUG_EXITS);
 397                r = RESUME_HOST;
 398                break;
 399        }
 400
 401        default:
 402                printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 403                BUG();
 404        }
 405
 406        local_irq_disable();
 407
 408        kvmppc_core_deliver_interrupts(vcpu);
 409
 410        if (!(r & RESUME_HOST)) {
 411                /* To avoid clobbering exit_reason, only check for signals if
 412                 * we aren't already exiting to userspace for some other
 413                 * reason. */
 414                if (signal_pending(current)) {
 415                        run->exit_reason = KVM_EXIT_INTR;
 416                        r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 417                        kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 418                }
 419        }
 420
 421        return r;
 422}
 423
 424/* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 425int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 426{
 427        vcpu->arch.pc = 0;
 428        vcpu->arch.msr = 0;
 429        vcpu->arch.gpr[1] = (16<<20) - 8; /* -8 for the callee-save LR slot */
 430
 431        vcpu->arch.shadow_pid = 1;
 432
 433        /* Eye-catching number so we know if the guest takes an interrupt
 434         * before it's programmed its own IVPR. */
 435        vcpu->arch.ivpr = 0x55550000;
 436
 437        kvmppc_init_timing_stats(vcpu);
 438
 439        return kvmppc_core_vcpu_setup(vcpu);
 440}
 441
 442int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 443{
 444        int i;
 445
 446        regs->pc = vcpu->arch.pc;
 447        regs->cr = vcpu->arch.cr;
 448        regs->ctr = vcpu->arch.ctr;
 449        regs->lr = vcpu->arch.lr;
 450        regs->xer = vcpu->arch.xer;
 451        regs->msr = vcpu->arch.msr;
 452        regs->srr0 = vcpu->arch.srr0;
 453        regs->srr1 = vcpu->arch.srr1;
 454        regs->pid = vcpu->arch.pid;
 455        regs->sprg0 = vcpu->arch.sprg0;
 456        regs->sprg1 = vcpu->arch.sprg1;
 457        regs->sprg2 = vcpu->arch.sprg2;
 458        regs->sprg3 = vcpu->arch.sprg3;
 459        regs->sprg5 = vcpu->arch.sprg4;
 460        regs->sprg6 = vcpu->arch.sprg5;
 461        regs->sprg7 = vcpu->arch.sprg6;
 462
 463        for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 464                regs->gpr[i] = vcpu->arch.gpr[i];
 465
 466        return 0;
 467}
 468
 469int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 470{
 471        int i;
 472
 473        vcpu->arch.pc = regs->pc;
 474        vcpu->arch.cr = regs->cr;
 475        vcpu->arch.ctr = regs->ctr;
 476        vcpu->arch.lr = regs->lr;
 477        vcpu->arch.xer = regs->xer;
 478        kvmppc_set_msr(vcpu, regs->msr);
 479        vcpu->arch.srr0 = regs->srr0;
 480        vcpu->arch.srr1 = regs->srr1;
 481        vcpu->arch.sprg0 = regs->sprg0;
 482        vcpu->arch.sprg1 = regs->sprg1;
 483        vcpu->arch.sprg2 = regs->sprg2;
 484        vcpu->arch.sprg3 = regs->sprg3;
 485        vcpu->arch.sprg5 = regs->sprg4;
 486        vcpu->arch.sprg6 = regs->sprg5;
 487        vcpu->arch.sprg7 = regs->sprg6;
 488
 489        for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
 490                vcpu->arch.gpr[i] = regs->gpr[i];
 491
 492        return 0;
 493}
 494
 495int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 496                                  struct kvm_sregs *sregs)
 497{
 498        return -ENOTSUPP;
 499}
 500
 501int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 502                                  struct kvm_sregs *sregs)
 503{
 504        return -ENOTSUPP;
 505}
 506
 507int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 508{
 509        return -ENOTSUPP;
 510}
 511
 512int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 513{
 514        return -ENOTSUPP;
 515}
 516
 517int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 518                                  struct kvm_translation *tr)
 519{
 520        return kvmppc_core_vcpu_translate(vcpu, tr);
 521}
 522
 523int kvmppc_booke_init(void)
 524{
 525        unsigned long ivor[16];
 526        unsigned long max_ivor = 0;
 527        int i;
 528
 529        /* We install our own exception handlers by hijacking IVPR. IVPR must
 530         * be 16-bit aligned, so we need a 64KB allocation. */
 531        kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
 532                                                 VCPU_SIZE_ORDER);
 533        if (!kvmppc_booke_handlers)
 534                return -ENOMEM;
 535
 536        /* XXX make sure our handlers are smaller than Linux's */
 537
 538        /* Copy our interrupt handlers to match host IVORs. That way we don't
 539         * have to swap the IVORs on every guest/host transition. */
 540        ivor[0] = mfspr(SPRN_IVOR0);
 541        ivor[1] = mfspr(SPRN_IVOR1);
 542        ivor[2] = mfspr(SPRN_IVOR2);
 543        ivor[3] = mfspr(SPRN_IVOR3);
 544        ivor[4] = mfspr(SPRN_IVOR4);
 545        ivor[5] = mfspr(SPRN_IVOR5);
 546        ivor[6] = mfspr(SPRN_IVOR6);
 547        ivor[7] = mfspr(SPRN_IVOR7);
 548        ivor[8] = mfspr(SPRN_IVOR8);
 549        ivor[9] = mfspr(SPRN_IVOR9);
 550        ivor[10] = mfspr(SPRN_IVOR10);
 551        ivor[11] = mfspr(SPRN_IVOR11);
 552        ivor[12] = mfspr(SPRN_IVOR12);
 553        ivor[13] = mfspr(SPRN_IVOR13);
 554        ivor[14] = mfspr(SPRN_IVOR14);
 555        ivor[15] = mfspr(SPRN_IVOR15);
 556
 557        for (i = 0; i < 16; i++) {
 558                if (ivor[i] > max_ivor)
 559                        max_ivor = ivor[i];
 560
 561                memcpy((void *)kvmppc_booke_handlers + ivor[i],
 562                       kvmppc_handlers_start + i * kvmppc_handler_len,
 563                       kvmppc_handler_len);
 564        }
 565        flush_icache_range(kvmppc_booke_handlers,
 566                           kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 567
 568        return 0;
 569}
 570
 571void __exit kvmppc_booke_exit(void)
 572{
 573        free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
 574        kvm_exit();
 575}
 576