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 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
  86                                         ulong dear_flags, ulong esr_flags)
  87 {
  88         vcpu->arch.queued_dear = dear_flags;
  89         vcpu->arch.queued_esr = esr_flags;
  90         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
  91 }
  92
  93 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
  94                                            ulong dear_flags, ulong esr_flags)
  95 {
  96         vcpu->arch.queued_dear = dear_flags;
  97         vcpu->arch.queued_esr = esr_flags;
  98         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
  99 }
 100
 101 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
 102                                            ulong esr_flags)
 103 {
 104         vcpu->arch.queued_esr = esr_flags;
 105         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 106 }
 107
 108 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
 109 {
 110         vcpu->arch.queued_esr = esr_flags;
 111         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 112 }
 113
 114 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 115 {
 116         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
 117 }
 118
 119 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 120 {
 121         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 122 }
 123
 124 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 125 {
 126         clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 127 }
 128
 129 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 130                                 struct kvm_interrupt *irq)
 131 {
 132         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
 133 }
 134
 135 /* Deliver the interrupt of the corresponding priority, if possible. */
 136 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 137                                         unsigned int priority)
 138 {
 139         int allowed = 0;
 140         ulong msr_mask;
 141         bool update_esr = false, update_dear = false;
 142
 143         switch (priority) {
 144         case BOOKE_IRQPRIO_DTLB_MISS:
 145         case BOOKE_IRQPRIO_DATA_STORAGE:
 146                 update_dear = true;
 147                 /* fall through */
 148         case BOOKE_IRQPRIO_INST_STORAGE:
 149         case BOOKE_IRQPRIO_PROGRAM:
 150                 update_esr = true;
 151                 /* fall through */
 152         case BOOKE_IRQPRIO_ITLB_MISS:
 153         case BOOKE_IRQPRIO_SYSCALL:
 154         case BOOKE_IRQPRIO_FP_UNAVAIL:
 155         case BOOKE_IRQPRIO_SPE_UNAVAIL:
 156         case BOOKE_IRQPRIO_SPE_FP_DATA:
 157         case BOOKE_IRQPRIO_SPE_FP_ROUND:
 158         case BOOKE_IRQPRIO_AP_UNAVAIL:
 159         case BOOKE_IRQPRIO_ALIGNMENT:
 160                 allowed = 1;
 161                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 162                 break;
 163         case BOOKE_IRQPRIO_CRITICAL:
 164         case BOOKE_IRQPRIO_WATCHDOG:
 165                 allowed = vcpu->arch.msr & MSR_CE;
 166                 msr_mask = MSR_ME;
 167                 break;
 168         case BOOKE_IRQPRIO_MACHINE_CHECK:
 169                 allowed = vcpu->arch.msr & MSR_ME;
 170                 msr_mask = 0;
 171                 break;
 172         case BOOKE_IRQPRIO_EXTERNAL:
 173         case BOOKE_IRQPRIO_DECREMENTER:
 174         case BOOKE_IRQPRIO_FIT:
 175                 allowed = vcpu->arch.msr & MSR_EE;
 176                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 177                 break;
 178         case BOOKE_IRQPRIO_DEBUG:
 179                 allowed = vcpu->arch.msr & MSR_DE;
 180                 msr_mask = MSR_ME;
 181                 break;
 182         }
 183
 184         if (allowed) {
 185                 vcpu->arch.srr0 = vcpu->arch.pc;
 186                 vcpu->arch.srr1 = vcpu->arch.msr;
 187                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 188                 if (update_esr == true)
 189                         vcpu->arch.esr = vcpu->arch.queued_esr;
 190                 if (update_dear == true)
 191                         vcpu->arch.dear = vcpu->arch.queued_dear;
 192                 kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
 193
 194                 clear_bit(priority, &vcpu->arch.pending_exceptions);
 195         }
 196
 197         return allowed;
 198 }
 199
 200 /* Check pending exceptions and deliver one, if possible. */
 201 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 202 {
 203         unsigned long *pending = &vcpu->arch.pending_exceptions;
 204         unsigned int priority;
 205
 206         priority = __ffs(*pending);
 207         while (priority <= BOOKE_IRQPRIO_MAX) {
 208                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 209                         break;
 210
 211                 priority = find_next_bit(pending,
 212                                          BITS_PER_BYTE * sizeof(*pending),
 213                                          priority + 1);
 214         }
 215 }
 216
 217 /**
 218  * kvmppc_handle_exit
 219  *
 220  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 221  */
 222 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 223                        unsigned int exit_nr)
 224 {
 225         enum emulation_result er;
 226         int r = RESUME_HOST;
 227
 228         /* update before a new last_exit_type is rewritten */
 229         kvmppc_update_timing_stats(vcpu);
 230
 231         local_irq_enable();
 232
 233         run->exit_reason = KVM_EXIT_UNKNOWN;
 234         run->ready_for_interrupt_injection = 1;
 235
 236         switch (exit_nr) {
 237         case BOOKE_INTERRUPT_MACHINE_CHECK:
 238                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 239                 kvmppc_dump_vcpu(vcpu);
 240                 r = RESUME_HOST;
 241                 break;
 242
 243         case BOOKE_INTERRUPT_EXTERNAL:
 244                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 245                 if (need_resched())
 246                         cond_resched();
 247                 r = RESUME_GUEST;
 248                 break;
 249
 250         case BOOKE_INTERRUPT_DECREMENTER:
 251                 /* Since we switched IVPR back to the host's value, the host
 252                  * handled this interrupt the moment we enabled interrupts.
 253                  * Now we just offer it a chance to reschedule the guest. */
 254                 kvmppc_account_exit(vcpu, DEC_EXITS);
 255                 if (need_resched())
 256                         cond_resched();
 257                 r = RESUME_GUEST;
 258                 break;
 259
 260         case BOOKE_INTERRUPT_PROGRAM:
 261                 if (vcpu->arch.msr & MSR_PR) {
 262                         /* Program traps generated by user-level software must be handled
 263                          * by the guest kernel. */
 264                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
 265                         r = RESUME_GUEST;
 266                         kvmppc_account_exit(vcpu, USR_PR_INST);
 267                         break;
 268                 }
 269
 270                 er = kvmppc_emulate_instruction(run, vcpu);
 271                 switch (er) {
 272                 case EMULATE_DONE:
 273                         /* don't overwrite subtypes, just account kvm_stats */
 274                         kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 275                         /* Future optimization: only reload non-volatiles if
 276                          * they were actually modified by emulation. */
 277                         r = RESUME_GUEST_NV;
 278                         break;
 279                 case EMULATE_DO_DCR:
 280                         run->exit_reason = KVM_EXIT_DCR;
 281                         r = RESUME_HOST;
 282                         break;
 283                 case EMULATE_FAIL:
 284                         /* XXX Deliver Program interrupt to guest. */
 285                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 286                                __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 287                         /* For debugging, encode the failing instruction and
 288                          * report it to userspace. */
 289                         run->hw.hardware_exit_reason = ~0ULL << 32;
 290                         run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 291                         r = RESUME_HOST;
 292                         break;
 293                 default:
 294                         BUG();
 295                 }
 296                 break;
 297
 298         case BOOKE_INTERRUPT_FP_UNAVAIL:
 299                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 300                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 301                 r = RESUME_GUEST;
 302                 break;
 303
 304         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 305                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
 306                 r = RESUME_GUEST;
 307                 break;
 308
 309         case BOOKE_INTERRUPT_SPE_FP_DATA:
 310                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 311                 r = RESUME_GUEST;
 312                 break;
 313
 314         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 315                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 316                 r = RESUME_GUEST;
 317                 break;
 318
 319         case BOOKE_INTERRUPT_DATA_STORAGE:
 320                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
 321                                                vcpu->arch.fault_esr);
 322                 kvmppc_account_exit(vcpu, DSI_EXITS);
 323                 r = RESUME_GUEST;
 324                 break;
 325
 326         case BOOKE_INTERRUPT_INST_STORAGE:
 327                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
 328                 kvmppc_account_exit(vcpu, ISI_EXITS);
 329                 r = RESUME_GUEST;
 330                 break;
 331
 332         case BOOKE_INTERRUPT_SYSCALL:
 333                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 334                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 335                 r = RESUME_GUEST;
 336                 break;
 337
 338         case BOOKE_INTERRUPT_DTLB_MISS: {
 339                 unsigned long eaddr = vcpu->arch.fault_dear;
 340                 int gtlb_index;
 341                 gpa_t gpaddr;
 342                 gfn_t gfn;
 343
 344                 /* Check the guest TLB. */
 345                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
 346                 if (gtlb_index < 0) {
 347                         /* The guest didn't have a mapping for it. */
 348                         kvmppc_core_queue_dtlb_miss(vcpu,
 349                                                     vcpu->arch.fault_dear,
 350                                                     vcpu->arch.fault_esr);
 351                         kvmppc_mmu_dtlb_miss(vcpu);
 352                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 353                         r = RESUME_GUEST;
 354                         break;
 355                 }
 356
 357                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 358                 gfn = gpaddr >> PAGE_SHIFT;
 359
 360                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 361                         /* The guest TLB had a mapping, but the shadow TLB
 362                          * didn't, and it is RAM. This could be because:
 363                          * a) the entry is mapping the host kernel, or
 364                          * b) the guest used a large mapping which we're faking
 365                          * Either way, we need to satisfy the fault without
 366                          * invoking the guest. */
 367                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 368                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 369                         r = RESUME_GUEST;
 370                 } else {
 371                         /* Guest has mapped and accessed a page which is not
 372                          * actually RAM. */
 373                         vcpu->arch.paddr_accessed = gpaddr;
 374                         r = kvmppc_emulate_mmio(run, vcpu);
 375                         kvmppc_account_exit(vcpu, MMIO_EXITS);
 376                 }
 377
 378                 break;
 379         }
 380
 381         case BOOKE_INTERRUPT_ITLB_MISS: {
 382                 unsigned long eaddr = vcpu->arch.pc;
 383                 gpa_t gpaddr;
 384                 gfn_t gfn;
 385                 int gtlb_index;
 386
 387                 r = RESUME_GUEST;
 388
 389                 /* Check the guest TLB. */
 390                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
 391                 if (gtlb_index < 0) {
 392                         /* The guest didn't have a mapping for it. */
 393                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 394                         kvmppc_mmu_itlb_miss(vcpu);
 395                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 396                         break;
 397                 }
 398
 399                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 400
 401                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 402                 gfn = gpaddr >> PAGE_SHIFT;
 403
 404                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 405                         /* The guest TLB had a mapping, but the shadow TLB
 406                          * didn't. This could be because:
 407                          * a) the entry is mapping the host kernel, or
 408                          * b) the guest used a large mapping which we're faking
 409                          * Either way, we need to satisfy the fault without
 410                          * invoking the guest. */
 411                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 412                 } else {
 413                         /* Guest mapped and leaped at non-RAM! */
 414                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 415                 }
 416
 417                 break;
 418         }
 419
 420         case BOOKE_INTERRUPT_DEBUG: {
 421                 u32 dbsr;
 422
 423                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 424
 425                 /* clear IAC events in DBSR register */
 426                 dbsr = mfspr(SPRN_DBSR);
 427                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 428                 mtspr(SPRN_DBSR, dbsr);
 429
 430                 run->exit_reason = KVM_EXIT_DEBUG;
 431                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
 432                 r = RESUME_HOST;
 433                 break;
 434         }
 435
 436         default:
 437                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 438                 BUG();
 439         }
 440
 441         local_irq_disable();
 442
 443         kvmppc_core_deliver_interrupts(vcpu);
 444
 445         if (!(r & RESUME_HOST)) {
 446                 /* To avoid clobbering exit_reason, only check for signals if
 447                  * we aren't already exiting to userspace for some other
 448                  * reason. */
 449                 if (signal_pending(current)) {
 450                         run->exit_reason = KVM_EXIT_INTR;
 451                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 452                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 453                 }
 454         }
 455
 456         return r;
 457 }
 458
 459 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 460 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 461 {
 462         vcpu->arch.pc = 0;
 463         vcpu->arch.msr = 0;
 464         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
 465
 466         vcpu->arch.shadow_pid = 1;
 467
 468         /* Eye-catching number so we know if the guest takes an interrupt
 469          * before it's programmed its own IVPR. */
 470         vcpu->arch.ivpr = 0x55550000;
 471
 472         kvmppc_init_timing_stats(vcpu);
 473
 474         return kvmppc_core_vcpu_setup(vcpu);
 475 }
 476
 477 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 478 {
 479         int i;
 480
 481         regs->pc = vcpu->arch.pc;
 482         regs->cr = kvmppc_get_cr(vcpu);
 483         regs->ctr = vcpu->arch.ctr;
 484         regs->lr = vcpu->arch.lr;
 485         regs->xer = kvmppc_get_xer(vcpu);
 486         regs->msr = vcpu->arch.msr;
 487         regs->srr0 = vcpu->arch.srr0;
 488         regs->srr1 = vcpu->arch.srr1;
 489         regs->pid = vcpu->arch.pid;
 490         regs->sprg0 = vcpu->arch.sprg0;
 491         regs->sprg1 = vcpu->arch.sprg1;
 492         regs->sprg2 = vcpu->arch.sprg2;
 493         regs->sprg3 = vcpu->arch.sprg3;
 494         regs->sprg5 = vcpu->arch.sprg4;
 495         regs->sprg6 = vcpu->arch.sprg5;
 496         regs->sprg7 = vcpu->arch.sprg6;
 497
 498         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 499                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 500
 501         return 0;
 502 }
 503
 504 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 505 {
 506         int i;
 507
 508         vcpu->arch.pc = regs->pc;
 509         kvmppc_set_cr(vcpu, regs->cr);
 510         vcpu->arch.ctr = regs->ctr;
 511         vcpu->arch.lr = regs->lr;
 512         kvmppc_set_xer(vcpu, regs->xer);
 513         kvmppc_set_msr(vcpu, regs->msr);
 514         vcpu->arch.srr0 = regs->srr0;
 515         vcpu->arch.srr1 = regs->srr1;
 516         vcpu->arch.sprg0 = regs->sprg0;
 517         vcpu->arch.sprg1 = regs->sprg1;
 518         vcpu->arch.sprg2 = regs->sprg2;
 519         vcpu->arch.sprg3 = regs->sprg3;
 520         vcpu->arch.sprg5 = regs->sprg4;
 521         vcpu->arch.sprg6 = regs->sprg5;
 522         vcpu->arch.sprg7 = regs->sprg6;
 523
 524         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 525                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 526
 527         return 0;
 528 }
 529
 530 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 531                                   struct kvm_sregs *sregs)
 532 {
 533         return -ENOTSUPP;
 534 }
 535
 536 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 537                                   struct kvm_sregs *sregs)
 538 {
 539         return -ENOTSUPP;
 540 }
 541
 542 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 543 {
 544         return -ENOTSUPP;
 545 }
 546
 547 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 548 {
 549         return -ENOTSUPP;
 550 }
 551
 552 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 553                                   struct kvm_translation *tr)
 554 {
 555         return kvmppc_core_vcpu_translate(vcpu, tr);
 556 }
 557
 558 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 559 {
 560         return -ENOTSUPP;
 561 }
 562
 563 int __init kvmppc_booke_init(void)
 564 {
 565         unsigned long ivor[16];
 566         unsigned long max_ivor = 0;
 567         int i;
 568
 569         /* We install our own exception handlers by hijacking IVPR. IVPR must
 570          * be 16-bit aligned, so we need a 64KB allocation. */
 571         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
 572                                                  VCPU_SIZE_ORDER);
 573         if (!kvmppc_booke_handlers)
 574                 return -ENOMEM;
 575
 576         /* XXX make sure our handlers are smaller than Linux's */
 577
 578         /* Copy our interrupt handlers to match host IVORs. That way we don't
 579          * have to swap the IVORs on every guest/host transition. */
 580         ivor[0] = mfspr(SPRN_IVOR0);
 581         ivor[1] = mfspr(SPRN_IVOR1);
 582         ivor[2] = mfspr(SPRN_IVOR2);
 583         ivor[3] = mfspr(SPRN_IVOR3);
 584         ivor[4] = mfspr(SPRN_IVOR4);
 585         ivor[5] = mfspr(SPRN_IVOR5);
 586         ivor[6] = mfspr(SPRN_IVOR6);
 587         ivor[7] = mfspr(SPRN_IVOR7);
 588         ivor[8] = mfspr(SPRN_IVOR8);
 589         ivor[9] = mfspr(SPRN_IVOR9);
 590         ivor[10] = mfspr(SPRN_IVOR10);
 591         ivor[11] = mfspr(SPRN_IVOR11);
 592         ivor[12] = mfspr(SPRN_IVOR12);
 593         ivor[13] = mfspr(SPRN_IVOR13);
 594         ivor[14] = mfspr(SPRN_IVOR14);
 595         ivor[15] = mfspr(SPRN_IVOR15);
 596
 597         for (i = 0; i < 16; i++) {
 598                 if (ivor[i] > max_ivor)
 599                         max_ivor = ivor[i];
 600
 601                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
 602                        kvmppc_handlers_start + i * kvmppc_handler_len,
 603                        kvmppc_handler_len);
 604         }
 605         flush_icache_range(kvmppc_booke_handlers,
 606                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 607
 608         return 0;
 609 }
 610
 611 void __exit kvmppc_booke_exit(void)
 612 {
 613         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
 614         kvm_exit();
 615 }