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
  34 #include "booke.h"
  35
  36 unsigned 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
  41 struct 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() */
  60 void 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                        kvmppc_get_gpr(vcpu, i),
  73                        kvmppc_get_gpr(vcpu, i+1),
  74                        kvmppc_get_gpr(vcpu, i+2),
  75                        kvmppc_get_gpr(vcpu, i+3));
  76         }
  77 }
  78
  79 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
  80                                        unsigned int priority)
  81 {
  82         set_bit(priority, &vcpu->arch.pending_exceptions);
  83 }
  84
  85 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
  86 {
  87         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
  88 }
  89
  90 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
  91 {
  92         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
  93 }
  94
  95 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
  96 {
  97         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
  98 }
  99
 100 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 101 {
 102         clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 103 }
 104
 105 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 106                                 struct kvm_interrupt *irq)
 107 {
 108         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
 109 }
 110
 111 /* Deliver the interrupt of the corresponding priority, if possible. */
 112 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 113                                         unsigned int priority)
 114 {
 115         int allowed = 0;
 116         ulong msr_mask;
 117
 118         switch (priority) {
 119         case BOOKE_IRQPRIO_PROGRAM:
 120         case BOOKE_IRQPRIO_DTLB_MISS:
 121         case BOOKE_IRQPRIO_ITLB_MISS:
 122         case BOOKE_IRQPRIO_SYSCALL:
 123         case BOOKE_IRQPRIO_DATA_STORAGE:
 124         case BOOKE_IRQPRIO_INST_STORAGE:
 125         case BOOKE_IRQPRIO_FP_UNAVAIL:
 126         case BOOKE_IRQPRIO_SPE_UNAVAIL:
 127         case BOOKE_IRQPRIO_SPE_FP_DATA:
 128         case BOOKE_IRQPRIO_SPE_FP_ROUND:
 129         case BOOKE_IRQPRIO_AP_UNAVAIL:
 130         case BOOKE_IRQPRIO_ALIGNMENT:
 131                 allowed = 1;
 132                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 133                 break;
 134         case BOOKE_IRQPRIO_CRITICAL:
 135         case BOOKE_IRQPRIO_WATCHDOG:
 136                 allowed = vcpu->arch.msr & MSR_CE;
 137                 msr_mask = MSR_ME;
 138                 break;
 139         case BOOKE_IRQPRIO_MACHINE_CHECK:
 140                 allowed = vcpu->arch.msr & MSR_ME;
 141                 msr_mask = 0;
 142                 break;
 143         case BOOKE_IRQPRIO_EXTERNAL:
 144         case BOOKE_IRQPRIO_DECREMENTER:
 145         case BOOKE_IRQPRIO_FIT:
 146                 allowed = vcpu->arch.msr & MSR_EE;
 147                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 148                 break;
 149         case BOOKE_IRQPRIO_DEBUG:
 150                 allowed = vcpu->arch.msr & MSR_DE;
 151                 msr_mask = MSR_ME;
 152                 break;
 153         }
 154
 155         if (allowed) {
 156                 vcpu->arch.srr0 = vcpu->arch.pc;
 157                 vcpu->arch.srr1 = vcpu->arch.msr;
 158                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 159                 kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
 160
 161                 clear_bit(priority, &vcpu->arch.pending_exceptions);
 162         }
 163
 164         return allowed;
 165 }
 166
 167 /* Check pending exceptions and deliver one, if possible. */
 168 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 169 {
 170         unsigned long *pending = &vcpu->arch.pending_exceptions;
 171         unsigned int priority;
 172
 173         priority = __ffs(*pending);
 174         while (priority <= BOOKE_IRQPRIO_MAX) {
 175                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 176                         break;
 177
 178                 priority = find_next_bit(pending,
 179                                          BITS_PER_BYTE * sizeof(*pending),
 180                                          priority + 1);
 181         }
 182 }
 183
 184 /**
 185  * kvmppc_handle_exit
 186  *
 187  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 188  */
 189 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 190                        unsigned int exit_nr)
 191 {
 192         enum emulation_result er;
 193         int r = RESUME_HOST;
 194
 195         /* update before a new last_exit_type is rewritten */
 196         kvmppc_update_timing_stats(vcpu);
 197
 198         local_irq_enable();
 199
 200         run->exit_reason = KVM_EXIT_UNKNOWN;
 201         run->ready_for_interrupt_injection = 1;
 202
 203         switch (exit_nr) {
 204         case BOOKE_INTERRUPT_MACHINE_CHECK:
 205                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 206                 kvmppc_dump_vcpu(vcpu);
 207                 r = RESUME_HOST;
 208                 break;
 209
 210         case BOOKE_INTERRUPT_EXTERNAL:
 211                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 212                 if (need_resched())
 213                         cond_resched();
 214                 r = RESUME_GUEST;
 215                 break;
 216
 217         case BOOKE_INTERRUPT_DECREMENTER:
 218                 /* Since we switched IVPR back to the host's value, the host
 219                  * handled this interrupt the moment we enabled interrupts.
 220                  * Now we just offer it a chance to reschedule the guest. */
 221                 kvmppc_account_exit(vcpu, DEC_EXITS);
 222                 if (need_resched())
 223                         cond_resched();
 224                 r = RESUME_GUEST;
 225                 break;
 226
 227         case BOOKE_INTERRUPT_PROGRAM:
 228                 if (vcpu->arch.msr & MSR_PR) {
 229                         /* Program traps generated by user-level software must be handled
 230                          * by the guest kernel. */
 231                         vcpu->arch.esr = vcpu->arch.fault_esr;
 232                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 233                         r = RESUME_GUEST;
 234                         kvmppc_account_exit(vcpu, USR_PR_INST);
 235                         break;
 236                 }
 237
 238                 er = kvmppc_emulate_instruction(run, vcpu);
 239                 switch (er) {
 240                 case EMULATE_DONE:
 241                         /* don't overwrite subtypes, just account kvm_stats */
 242                         kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 243                         /* Future optimization: only reload non-volatiles if
 244                          * they were actually modified by emulation. */
 245                         r = RESUME_GUEST_NV;
 246                         break;
 247                 case EMULATE_DO_DCR:
 248                         run->exit_reason = KVM_EXIT_DCR;
 249                         r = RESUME_HOST;
 250                         break;
 251                 case EMULATE_FAIL:
 252                         /* XXX Deliver Program interrupt to guest. */
 253                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 254                                __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 255                         /* For debugging, encode the failing instruction and
 256                          * report it to userspace. */
 257                         run->hw.hardware_exit_reason = ~0ULL << 32;
 258                         run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 259                         r = RESUME_HOST;
 260                         break;
 261                 default:
 262                         BUG();
 263                 }
 264                 break;
 265
 266         case BOOKE_INTERRUPT_FP_UNAVAIL:
 267                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 268                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 269                 r = RESUME_GUEST;
 270                 break;
 271
 272         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 273                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
 274                 r = RESUME_GUEST;
 275                 break;
 276
 277         case BOOKE_INTERRUPT_SPE_FP_DATA:
 278                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 279                 r = RESUME_GUEST;
 280                 break;
 281
 282         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 283                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 284                 r = RESUME_GUEST;
 285                 break;
 286
 287         case BOOKE_INTERRUPT_DATA_STORAGE:
 288                 vcpu->arch.dear = vcpu->arch.fault_dear;
 289                 vcpu->arch.esr = vcpu->arch.fault_esr;
 290                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 291                 kvmppc_account_exit(vcpu, DSI_EXITS);
 292                 r = RESUME_GUEST;
 293                 break;
 294
 295         case BOOKE_INTERRUPT_INST_STORAGE:
 296                 vcpu->arch.esr = vcpu->arch.fault_esr;
 297                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 298                 kvmppc_account_exit(vcpu, ISI_EXITS);
 299                 r = RESUME_GUEST;
 300                 break;
 301
 302         case BOOKE_INTERRUPT_SYSCALL:
 303                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 304                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 305                 r = RESUME_GUEST;
 306                 break;
 307
 308         case BOOKE_INTERRUPT_DTLB_MISS: {
 309                 unsigned long eaddr = vcpu->arch.fault_dear;
 310                 int gtlb_index;
 311                 gpa_t gpaddr;
 312                 gfn_t gfn;
 313
 314                 /* Check the guest TLB. */
 315                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
 316                 if (gtlb_index < 0) {
 317                         /* The guest didn't have a mapping for it. */
 318                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
 319                         vcpu->arch.dear = vcpu->arch.fault_dear;
 320                         vcpu->arch.esr = vcpu->arch.fault_esr;
 321                         kvmppc_mmu_dtlb_miss(vcpu);
 322                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 323                         r = RESUME_GUEST;
 324                         break;
 325                 }
 326
 327                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 328                 gfn = gpaddr >> PAGE_SHIFT;
 329
 330                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 331                         /* The guest TLB had a mapping, but the shadow TLB
 332                          * didn't, and it is RAM. This could be because:
 333                          * a) the entry is mapping the host kernel, or
 334                          * b) the guest used a large mapping which we're faking
 335                          * Either way, we need to satisfy the fault without
 336                          * invoking the guest. */
 337                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 338                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 339                         r = RESUME_GUEST;
 340                 } else {
 341                         /* Guest has mapped and accessed a page which is not
 342                          * actually RAM. */
 343                         vcpu->arch.paddr_accessed = gpaddr;
 344                         r = kvmppc_emulate_mmio(run, vcpu);
 345                         kvmppc_account_exit(vcpu, MMIO_EXITS);
 346                 }
 347
 348                 break;
 349         }
 350
 351         case BOOKE_INTERRUPT_ITLB_MISS: {
 352                 unsigned long eaddr = vcpu->arch.pc;
 353                 gpa_t gpaddr;
 354                 gfn_t gfn;
 355                 int gtlb_index;
 356
 357                 r = RESUME_GUEST;
 358
 359                 /* Check the guest TLB. */
 360                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
 361                 if (gtlb_index < 0) {
 362                         /* The guest didn't have a mapping for it. */
 363                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 364                         kvmppc_mmu_itlb_miss(vcpu);
 365                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 366                         break;
 367                 }
 368
 369                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 370
 371                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 372                 gfn = gpaddr >> PAGE_SHIFT;
 373
 374                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 375                         /* The guest TLB had a mapping, but the shadow TLB
 376                          * didn't. This could be because:
 377                          * a) the entry is mapping the host kernel, or
 378                          * b) the guest used a large mapping which we're faking
 379                          * Either way, we need to satisfy the fault without
 380                          * invoking the guest. */
 381                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 382                 } else {
 383                         /* Guest mapped and leaped at non-RAM! */
 384                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 385                 }
 386
 387                 break;
 388         }
 389
 390         case BOOKE_INTERRUPT_DEBUG: {
 391                 u32 dbsr;
 392
 393                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 394
 395                 /* clear IAC events in DBSR register */
 396                 dbsr = mfspr(SPRN_DBSR);
 397                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 398                 mtspr(SPRN_DBSR, dbsr);
 399
 400                 run->exit_reason = KVM_EXIT_DEBUG;
 401                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
 402                 r = RESUME_HOST;
 403                 break;
 404         }
 405
 406         default:
 407                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 408                 BUG();
 409         }
 410
 411         local_irq_disable();
 412
 413         kvmppc_core_deliver_interrupts(vcpu);
 414
 415         if (!(r & RESUME_HOST)) {
 416                 /* To avoid clobbering exit_reason, only check for signals if
 417                  * we aren't already exiting to userspace for some other
 418                  * reason. */
 419                 if (signal_pending(current)) {
 420                         run->exit_reason = KVM_EXIT_INTR;
 421                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 422                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 423                 }
 424         }
 425
 426         return r;
 427 }
 428
 429 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 430 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 431 {
 432         vcpu->arch.pc = 0;
 433         vcpu->arch.msr = 0;
 434         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
 435
 436         vcpu->arch.shadow_pid = 1;
 437
 438         /* Eye-catching number so we know if the guest takes an interrupt
 439          * before it's programmed its own IVPR. */
 440         vcpu->arch.ivpr = 0x55550000;
 441
 442         kvmppc_init_timing_stats(vcpu);
 443
 444         return kvmppc_core_vcpu_setup(vcpu);
 445 }
 446
 447 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 448 {
 449         int i;
 450
 451         regs->pc = vcpu->arch.pc;
 452         regs->cr = vcpu->arch.cr;
 453         regs->ctr = vcpu->arch.ctr;
 454         regs->lr = vcpu->arch.lr;
 455         regs->xer = vcpu->arch.xer;
 456         regs->msr = vcpu->arch.msr;
 457         regs->srr0 = vcpu->arch.srr0;
 458         regs->srr1 = vcpu->arch.srr1;
 459         regs->pid = vcpu->arch.pid;
 460         regs->sprg0 = vcpu->arch.sprg0;
 461         regs->sprg1 = vcpu->arch.sprg1;
 462         regs->sprg2 = vcpu->arch.sprg2;
 463         regs->sprg3 = vcpu->arch.sprg3;
 464         regs->sprg5 = vcpu->arch.sprg4;
 465         regs->sprg6 = vcpu->arch.sprg5;
 466         regs->sprg7 = vcpu->arch.sprg6;
 467
 468         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 469                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 470
 471         return 0;
 472 }
 473
 474 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 475 {
 476         int i;
 477
 478         vcpu->arch.pc = regs->pc;
 479         vcpu->arch.cr = regs->cr;
 480         vcpu->arch.ctr = regs->ctr;
 481         vcpu->arch.lr = regs->lr;
 482         vcpu->arch.xer = regs->xer;
 483         kvmppc_set_msr(vcpu, regs->msr);
 484         vcpu->arch.srr0 = regs->srr0;
 485         vcpu->arch.srr1 = regs->srr1;
 486         vcpu->arch.sprg0 = regs->sprg0;
 487         vcpu->arch.sprg1 = regs->sprg1;
 488         vcpu->arch.sprg2 = regs->sprg2;
 489         vcpu->arch.sprg3 = regs->sprg3;
 490         vcpu->arch.sprg5 = regs->sprg4;
 491         vcpu->arch.sprg6 = regs->sprg5;
 492         vcpu->arch.sprg7 = regs->sprg6;
 493
 494         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 495                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 496
 497         return 0;
 498 }
 499
 500 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 501                                   struct kvm_sregs *sregs)
 502 {
 503         return -ENOTSUPP;
 504 }
 505
 506 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 507                                   struct kvm_sregs *sregs)
 508 {
 509         return -ENOTSUPP;
 510 }
 511
 512 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 513 {
 514         return -ENOTSUPP;
 515 }
 516
 517 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 518 {
 519         return -ENOTSUPP;
 520 }
 521
 522 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 523                                   struct kvm_translation *tr)
 524 {
 525         return kvmppc_core_vcpu_translate(vcpu, tr);
 526 }
 527
 528 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 529 {
 530         return -ENOTSUPP;
 531 }
 532
 533 int __init kvmppc_booke_init(void)
 534 {
 535         unsigned long ivor[16];
 536         unsigned long max_ivor = 0;
 537         int i;
 538
 539         /* We install our own exception handlers by hijacking IVPR. IVPR must
 540          * be 16-bit aligned, so we need a 64KB allocation. */
 541         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
 542                                                  VCPU_SIZE_ORDER);
 543         if (!kvmppc_booke_handlers)
 544                 return -ENOMEM;
 545
 546         /* XXX make sure our handlers are smaller than Linux's */
 547
 548         /* Copy our interrupt handlers to match host IVORs. That way we don't
 549          * have to swap the IVORs on every guest/host transition. */
 550         ivor[0] = mfspr(SPRN_IVOR0);
 551         ivor[1] = mfspr(SPRN_IVOR1);
 552         ivor[2] = mfspr(SPRN_IVOR2);
 553         ivor[3] = mfspr(SPRN_IVOR3);
 554         ivor[4] = mfspr(SPRN_IVOR4);
 555         ivor[5] = mfspr(SPRN_IVOR5);
 556         ivor[6] = mfspr(SPRN_IVOR6);
 557         ivor[7] = mfspr(SPRN_IVOR7);
 558         ivor[8] = mfspr(SPRN_IVOR8);
 559         ivor[9] = mfspr(SPRN_IVOR9);
 560         ivor[10] = mfspr(SPRN_IVOR10);
 561         ivor[11] = mfspr(SPRN_IVOR11);
 562         ivor[12] = mfspr(SPRN_IVOR12);
 563         ivor[13] = mfspr(SPRN_IVOR13);
 564         ivor[14] = mfspr(SPRN_IVOR14);
 565         ivor[15] = mfspr(SPRN_IVOR15);
 566
 567         for (i = 0; i < 16; i++) {
 568                 if (ivor[i] > max_ivor)
 569                         max_ivor = ivor[i];
 570
 571                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
 572                        kvmppc_handlers_start + i * kvmppc_handler_len,
 573                        kvmppc_handler_len);
 574         }
 575         flush_icache_range(kvmppc_booke_handlers,
 576                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 577
 578         return 0;
 579 }
 580
 581 void __exit kvmppc_booke_exit(void)
 582 {
 583         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
 584         kvm_exit();
 585 }