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/gfp.h>
  25 #include <linux/module.h>
  26 #include <linux/vmalloc.h>
  27 #include <linux/fs.h>
  28
  29 #include <asm/cputable.h>
  30 #include <asm/uaccess.h>
  31 #include <asm/kvm_ppc.h>
  32 #include "timing.h"
  33 #include <asm/cacheflush.h>
  34
  35 #include "booke.h"
  36
  37 unsigned long kvmppc_booke_handlers;
  38
  39 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
  40 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  41
  42 struct kvm_stats_debugfs_item debugfs_entries[] = {
  43         { "mmio",       VCPU_STAT(mmio_exits) },
  44         { "dcr",        VCPU_STAT(dcr_exits) },
  45         { "sig",        VCPU_STAT(signal_exits) },
  46         { "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
  47         { "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
  48         { "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
  49         { "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
  50         { "sysc",       VCPU_STAT(syscall_exits) },
  51         { "isi",        VCPU_STAT(isi_exits) },
  52         { "dsi",        VCPU_STAT(dsi_exits) },
  53         { "inst_emu",   VCPU_STAT(emulated_inst_exits) },
  54         { "dec",        VCPU_STAT(dec_exits) },
  55         { "ext_intr",   VCPU_STAT(ext_intr_exits) },
  56         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  57         { NULL }
  58 };
  59
  60 /* TODO: use vcpu_printf() */
  61 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
  62 {
  63         int i;
  64
  65         printk("pc:   %08lx msr:  %08lx\n", vcpu->arch.pc, vcpu->arch.msr);
  66         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
  67         printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1);
  68
  69         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  70
  71         for (i = 0; i < 32; i += 4) {
  72                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  73                        kvmppc_get_gpr(vcpu, i),
  74                        kvmppc_get_gpr(vcpu, i+1),
  75                        kvmppc_get_gpr(vcpu, i+2),
  76                        kvmppc_get_gpr(vcpu, i+3));
  77         }
  78 }
  79
  80 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
  81                                        unsigned int priority)
  82 {
  83         set_bit(priority, &vcpu->arch.pending_exceptions);
  84 }
  85
  86 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
  87                                         ulong dear_flags, ulong esr_flags)
  88 {
  89         vcpu->arch.queued_dear = dear_flags;
  90         vcpu->arch.queued_esr = esr_flags;
  91         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
  92 }
  93
  94 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
  95                                            ulong dear_flags, ulong esr_flags)
  96 {
  97         vcpu->arch.queued_dear = dear_flags;
  98         vcpu->arch.queued_esr = esr_flags;
  99         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 100 }
 101
 102 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
 103                                            ulong esr_flags)
 104 {
 105         vcpu->arch.queued_esr = esr_flags;
 106         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 107 }
 108
 109 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
 110 {
 111         vcpu->arch.queued_esr = esr_flags;
 112         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 113 }
 114
 115 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 116 {
 117         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
 118 }
 119
 120 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 121 {
 122         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 123 }
 124
 125 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 126 {
 127         clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 128 }
 129
 130 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 131                                 struct kvm_interrupt *irq)
 132 {
 133         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
 134 }
 135
 136 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
 137                                   struct kvm_interrupt *irq)
 138 {
 139         clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
 140 }
 141
 142 /* Deliver the interrupt of the corresponding priority, if possible. */
 143 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 144                                         unsigned int priority)
 145 {
 146         int allowed = 0;
 147         ulong uninitialized_var(msr_mask);
 148         bool update_esr = false, update_dear = false;
 149
 150         switch (priority) {
 151         case BOOKE_IRQPRIO_DTLB_MISS:
 152         case BOOKE_IRQPRIO_DATA_STORAGE:
 153                 update_dear = true;
 154                 /* fall through */
 155         case BOOKE_IRQPRIO_INST_STORAGE:
 156         case BOOKE_IRQPRIO_PROGRAM:
 157                 update_esr = true;
 158                 /* fall through */
 159         case BOOKE_IRQPRIO_ITLB_MISS:
 160         case BOOKE_IRQPRIO_SYSCALL:
 161         case BOOKE_IRQPRIO_FP_UNAVAIL:
 162         case BOOKE_IRQPRIO_SPE_UNAVAIL:
 163         case BOOKE_IRQPRIO_SPE_FP_DATA:
 164         case BOOKE_IRQPRIO_SPE_FP_ROUND:
 165         case BOOKE_IRQPRIO_AP_UNAVAIL:
 166         case BOOKE_IRQPRIO_ALIGNMENT:
 167                 allowed = 1;
 168                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 169                 break;
 170         case BOOKE_IRQPRIO_CRITICAL:
 171         case BOOKE_IRQPRIO_WATCHDOG:
 172                 allowed = vcpu->arch.msr & MSR_CE;
 173                 msr_mask = MSR_ME;
 174                 break;
 175         case BOOKE_IRQPRIO_MACHINE_CHECK:
 176                 allowed = vcpu->arch.msr & MSR_ME;
 177                 msr_mask = 0;
 178                 break;
 179         case BOOKE_IRQPRIO_EXTERNAL:
 180         case BOOKE_IRQPRIO_DECREMENTER:
 181         case BOOKE_IRQPRIO_FIT:
 182                 allowed = vcpu->arch.msr & MSR_EE;
 183                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 184                 break;
 185         case BOOKE_IRQPRIO_DEBUG:
 186                 allowed = vcpu->arch.msr & MSR_DE;
 187                 msr_mask = MSR_ME;
 188                 break;
 189         }
 190
 191         if (allowed) {
 192                 vcpu->arch.srr0 = vcpu->arch.pc;
 193                 vcpu->arch.srr1 = vcpu->arch.msr;
 194                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 195                 if (update_esr == true)
 196                         vcpu->arch.esr = vcpu->arch.queued_esr;
 197                 if (update_dear == true)
 198                         vcpu->arch.dear = vcpu->arch.queued_dear;
 199                 kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
 200
 201                 clear_bit(priority, &vcpu->arch.pending_exceptions);
 202         }
 203
 204         return allowed;
 205 }
 206
 207 /* Check pending exceptions and deliver one, if possible. */
 208 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 209 {
 210         unsigned long *pending = &vcpu->arch.pending_exceptions;
 211         unsigned int priority;
 212
 213         priority = __ffs(*pending);
 214         while (priority <= BOOKE_IRQPRIO_MAX) {
 215                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 216                         break;
 217
 218                 priority = find_next_bit(pending,
 219                                          BITS_PER_BYTE * sizeof(*pending),
 220                                          priority + 1);
 221         }
 222 }
 223
 224 /**
 225  * kvmppc_handle_exit
 226  *
 227  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 228  */
 229 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 230                        unsigned int exit_nr)
 231 {
 232         enum emulation_result er;
 233         int r = RESUME_HOST;
 234
 235         /* update before a new last_exit_type is rewritten */
 236         kvmppc_update_timing_stats(vcpu);
 237
 238         local_irq_enable();
 239
 240         run->exit_reason = KVM_EXIT_UNKNOWN;
 241         run->ready_for_interrupt_injection = 1;
 242
 243         switch (exit_nr) {
 244         case BOOKE_INTERRUPT_MACHINE_CHECK:
 245                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 246                 kvmppc_dump_vcpu(vcpu);
 247                 r = RESUME_HOST;
 248                 break;
 249
 250         case BOOKE_INTERRUPT_EXTERNAL:
 251                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 252                 if (need_resched())
 253                         cond_resched();
 254                 r = RESUME_GUEST;
 255                 break;
 256
 257         case BOOKE_INTERRUPT_DECREMENTER:
 258                 /* Since we switched IVPR back to the host's value, the host
 259                  * handled this interrupt the moment we enabled interrupts.
 260                  * Now we just offer it a chance to reschedule the guest. */
 261                 kvmppc_account_exit(vcpu, DEC_EXITS);
 262                 if (need_resched())
 263                         cond_resched();
 264                 r = RESUME_GUEST;
 265                 break;
 266
 267         case BOOKE_INTERRUPT_PROGRAM:
 268                 if (vcpu->arch.msr & MSR_PR) {
 269                         /* Program traps generated by user-level software must be handled
 270                          * by the guest kernel. */
 271                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
 272                         r = RESUME_GUEST;
 273                         kvmppc_account_exit(vcpu, USR_PR_INST);
 274                         break;
 275                 }
 276
 277                 er = kvmppc_emulate_instruction(run, vcpu);
 278                 switch (er) {
 279                 case EMULATE_DONE:
 280                         /* don't overwrite subtypes, just account kvm_stats */
 281                         kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 282                         /* Future optimization: only reload non-volatiles if
 283                          * they were actually modified by emulation. */
 284                         r = RESUME_GUEST_NV;
 285                         break;
 286                 case EMULATE_DO_DCR:
 287                         run->exit_reason = KVM_EXIT_DCR;
 288                         r = RESUME_HOST;
 289                         break;
 290                 case EMULATE_FAIL:
 291                         /* XXX Deliver Program interrupt to guest. */
 292                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 293                                __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 294                         /* For debugging, encode the failing instruction and
 295                          * report it to userspace. */
 296                         run->hw.hardware_exit_reason = ~0ULL << 32;
 297                         run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 298                         r = RESUME_HOST;
 299                         break;
 300                 default:
 301                         BUG();
 302                 }
 303                 break;
 304
 305         case BOOKE_INTERRUPT_FP_UNAVAIL:
 306                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 307                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 308                 r = RESUME_GUEST;
 309                 break;
 310
 311         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 312                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
 313                 r = RESUME_GUEST;
 314                 break;
 315
 316         case BOOKE_INTERRUPT_SPE_FP_DATA:
 317                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 318                 r = RESUME_GUEST;
 319                 break;
 320
 321         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 322                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 323                 r = RESUME_GUEST;
 324                 break;
 325
 326         case BOOKE_INTERRUPT_DATA_STORAGE:
 327                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
 328                                                vcpu->arch.fault_esr);
 329                 kvmppc_account_exit(vcpu, DSI_EXITS);
 330                 r = RESUME_GUEST;
 331                 break;
 332
 333         case BOOKE_INTERRUPT_INST_STORAGE:
 334                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
 335                 kvmppc_account_exit(vcpu, ISI_EXITS);
 336                 r = RESUME_GUEST;
 337                 break;
 338
 339         case BOOKE_INTERRUPT_SYSCALL:
 340                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 341                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 342                 r = RESUME_GUEST;
 343                 break;
 344
 345         case BOOKE_INTERRUPT_DTLB_MISS: {
 346                 unsigned long eaddr = vcpu->arch.fault_dear;
 347                 int gtlb_index;
 348                 gpa_t gpaddr;
 349                 gfn_t gfn;
 350
 351                 /* Check the guest TLB. */
 352                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
 353                 if (gtlb_index < 0) {
 354                         /* The guest didn't have a mapping for it. */
 355                         kvmppc_core_queue_dtlb_miss(vcpu,
 356                                                     vcpu->arch.fault_dear,
 357                                                     vcpu->arch.fault_esr);
 358                         kvmppc_mmu_dtlb_miss(vcpu);
 359                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 360                         r = RESUME_GUEST;
 361                         break;
 362                 }
 363
 364                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 365                 gfn = gpaddr >> PAGE_SHIFT;
 366
 367                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 368                         /* The guest TLB had a mapping, but the shadow TLB
 369                          * didn't, and it is RAM. This could be because:
 370                          * a) the entry is mapping the host kernel, or
 371                          * b) the guest used a large mapping which we're faking
 372                          * Either way, we need to satisfy the fault without
 373                          * invoking the guest. */
 374                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 375                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 376                         r = RESUME_GUEST;
 377                 } else {
 378                         /* Guest has mapped and accessed a page which is not
 379                          * actually RAM. */
 380                         vcpu->arch.paddr_accessed = gpaddr;
 381                         r = kvmppc_emulate_mmio(run, vcpu);
 382                         kvmppc_account_exit(vcpu, MMIO_EXITS);
 383                 }
 384
 385                 break;
 386         }
 387
 388         case BOOKE_INTERRUPT_ITLB_MISS: {
 389                 unsigned long eaddr = vcpu->arch.pc;
 390                 gpa_t gpaddr;
 391                 gfn_t gfn;
 392                 int gtlb_index;
 393
 394                 r = RESUME_GUEST;
 395
 396                 /* Check the guest TLB. */
 397                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
 398                 if (gtlb_index < 0) {
 399                         /* The guest didn't have a mapping for it. */
 400                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 401                         kvmppc_mmu_itlb_miss(vcpu);
 402                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 403                         break;
 404                 }
 405
 406                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 407
 408                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 409                 gfn = gpaddr >> PAGE_SHIFT;
 410
 411                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 412                         /* The guest TLB had a mapping, but the shadow TLB
 413                          * didn't. This could be because:
 414                          * a) the entry is mapping the host kernel, or
 415                          * b) the guest used a large mapping which we're faking
 416                          * Either way, we need to satisfy the fault without
 417                          * invoking the guest. */
 418                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 419                 } else {
 420                         /* Guest mapped and leaped at non-RAM! */
 421                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 422                 }
 423
 424                 break;
 425         }
 426
 427         case BOOKE_INTERRUPT_DEBUG: {
 428                 u32 dbsr;
 429
 430                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 431
 432                 /* clear IAC events in DBSR register */
 433                 dbsr = mfspr(SPRN_DBSR);
 434                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 435                 mtspr(SPRN_DBSR, dbsr);
 436
 437                 run->exit_reason = KVM_EXIT_DEBUG;
 438                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
 439                 r = RESUME_HOST;
 440                 break;
 441         }
 442
 443         default:
 444                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 445                 BUG();
 446         }
 447
 448         local_irq_disable();
 449
 450         kvmppc_core_deliver_interrupts(vcpu);
 451
 452         if (!(r & RESUME_HOST)) {
 453                 /* To avoid clobbering exit_reason, only check for signals if
 454                  * we aren't already exiting to userspace for some other
 455                  * reason. */
 456                 if (signal_pending(current)) {
 457                         run->exit_reason = KVM_EXIT_INTR;
 458                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 459                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 460                 }
 461         }
 462
 463         return r;
 464 }
 465
 466 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 467 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 468 {
 469         vcpu->arch.pc = 0;
 470         vcpu->arch.msr = 0;
 471         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
 472
 473         vcpu->arch.shadow_pid = 1;
 474
 475         /* Eye-catching number so we know if the guest takes an interrupt
 476          * before it's programmed its own IVPR. */
 477         vcpu->arch.ivpr = 0x55550000;
 478
 479         kvmppc_init_timing_stats(vcpu);
 480
 481         return kvmppc_core_vcpu_setup(vcpu);
 482 }
 483
 484 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 485 {
 486         int i;
 487
 488         regs->pc = vcpu->arch.pc;
 489         regs->cr = kvmppc_get_cr(vcpu);
 490         regs->ctr = vcpu->arch.ctr;
 491         regs->lr = vcpu->arch.lr;
 492         regs->xer = kvmppc_get_xer(vcpu);
 493         regs->msr = vcpu->arch.msr;
 494         regs->srr0 = vcpu->arch.srr0;
 495         regs->srr1 = vcpu->arch.srr1;
 496         regs->pid = vcpu->arch.pid;
 497         regs->sprg0 = vcpu->arch.sprg0;
 498         regs->sprg1 = vcpu->arch.sprg1;
 499         regs->sprg2 = vcpu->arch.sprg2;
 500         regs->sprg3 = vcpu->arch.sprg3;
 501         regs->sprg5 = vcpu->arch.sprg4;
 502         regs->sprg6 = vcpu->arch.sprg5;
 503         regs->sprg7 = vcpu->arch.sprg6;
 504
 505         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 506                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 507
 508         return 0;
 509 }
 510
 511 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 512 {
 513         int i;
 514
 515         vcpu->arch.pc = regs->pc;
 516         kvmppc_set_cr(vcpu, regs->cr);
 517         vcpu->arch.ctr = regs->ctr;
 518         vcpu->arch.lr = regs->lr;
 519         kvmppc_set_xer(vcpu, regs->xer);
 520         kvmppc_set_msr(vcpu, regs->msr);
 521         vcpu->arch.srr0 = regs->srr0;
 522         vcpu->arch.srr1 = regs->srr1;
 523         vcpu->arch.sprg0 = regs->sprg0;
 524         vcpu->arch.sprg1 = regs->sprg1;
 525         vcpu->arch.sprg2 = regs->sprg2;
 526         vcpu->arch.sprg3 = regs->sprg3;
 527         vcpu->arch.sprg5 = regs->sprg4;
 528         vcpu->arch.sprg6 = regs->sprg5;
 529         vcpu->arch.sprg7 = regs->sprg6;
 530
 531         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 532                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 533
 534         return 0;
 535 }
 536
 537 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 538                                   struct kvm_sregs *sregs)
 539 {
 540         return -ENOTSUPP;
 541 }
 542
 543 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 544                                   struct kvm_sregs *sregs)
 545 {
 546         return -ENOTSUPP;
 547 }
 548
 549 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 550 {
 551         return -ENOTSUPP;
 552 }
 553
 554 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 555 {
 556         return -ENOTSUPP;
 557 }
 558
 559 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 560                                   struct kvm_translation *tr)
 561 {
 562         int r;
 563
 564         r = kvmppc_core_vcpu_translate(vcpu, tr);
 565         return r;
 566 }
 567
 568 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 569 {
 570         return -ENOTSUPP;
 571 }
 572
 573 int __init kvmppc_booke_init(void)
 574 {
 575         unsigned long ivor[16];
 576         unsigned long max_ivor = 0;
 577         int i;
 578
 579         /* We install our own exception handlers by hijacking IVPR. IVPR must
 580          * be 16-bit aligned, so we need a 64KB allocation. */
 581         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
 582                                                  VCPU_SIZE_ORDER);
 583         if (!kvmppc_booke_handlers)
 584                 return -ENOMEM;
 585
 586         /* XXX make sure our handlers are smaller than Linux's */
 587
 588         /* Copy our interrupt handlers to match host IVORs. That way we don't
 589          * have to swap the IVORs on every guest/host transition. */
 590         ivor[0] = mfspr(SPRN_IVOR0);
 591         ivor[1] = mfspr(SPRN_IVOR1);
 592         ivor[2] = mfspr(SPRN_IVOR2);
 593         ivor[3] = mfspr(SPRN_IVOR3);
 594         ivor[4] = mfspr(SPRN_IVOR4);
 595         ivor[5] = mfspr(SPRN_IVOR5);
 596         ivor[6] = mfspr(SPRN_IVOR6);
 597         ivor[7] = mfspr(SPRN_IVOR7);
 598         ivor[8] = mfspr(SPRN_IVOR8);
 599         ivor[9] = mfspr(SPRN_IVOR9);
 600         ivor[10] = mfspr(SPRN_IVOR10);
 601         ivor[11] = mfspr(SPRN_IVOR11);
 602         ivor[12] = mfspr(SPRN_IVOR12);
 603         ivor[13] = mfspr(SPRN_IVOR13);
 604         ivor[14] = mfspr(SPRN_IVOR14);
 605         ivor[15] = mfspr(SPRN_IVOR15);
 606
 607         for (i = 0; i < 16; i++) {
 608                 if (ivor[i] > max_ivor)
 609                         max_ivor = ivor[i];
 610
 611                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
 612                        kvmppc_handlers_start + i * kvmppc_handler_len,
 613                        kvmppc_handler_len);
 614         }
 615         flush_icache_range(kvmppc_booke_handlers,
 616                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 617
 618         return 0;
 619 }
 620
 621 void __exit kvmppc_booke_exit(void)
 622 {
 623         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
 624         kvm_exit();
 625 }