Pileus Git - ~andy/linux/blob - 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:  %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
  66         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
  67         printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
  68                                             vcpu->arch.shared->srr1);
  69
  70         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  71
  72         for (i = 0; i < 32; i += 4) {
  73                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  74                        kvmppc_get_gpr(vcpu, i),
  75                        kvmppc_get_gpr(vcpu, i+1),
  76                        kvmppc_get_gpr(vcpu, i+2),
  77                        kvmppc_get_gpr(vcpu, i+3));
  78         }
  79 }
  80
  81 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
  82                                        unsigned int priority)
  83 {
  84         set_bit(priority, &vcpu->arch.pending_exceptions);
  85 }
  86
  87 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
  88                                         ulong dear_flags, ulong esr_flags)
  89 {
  90         vcpu->arch.queued_dear = dear_flags;
  91         vcpu->arch.queued_esr = esr_flags;
  92         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
  93 }
  94
  95 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
  96                                            ulong dear_flags, ulong esr_flags)
  97 {
  98         vcpu->arch.queued_dear = dear_flags;
  99         vcpu->arch.queued_esr = esr_flags;
 100         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 101 }
 102
 103 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
 104                                            ulong esr_flags)
 105 {
 106         vcpu->arch.queued_esr = esr_flags;
 107         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 108 }
 109
 110 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
 111 {
 112         vcpu->arch.queued_esr = esr_flags;
 113         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 114 }
 115
 116 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 117 {
 118         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
 119 }
 120
 121 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 122 {
 123         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 124 }
 125
 126 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 127 {
 128         clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 129 }
 130
 131 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 132                                 struct kvm_interrupt *irq)
 133 {
 134         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
 135 }
 136
 137 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
 138                                   struct kvm_interrupt *irq)
 139 {
 140         clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
 141 }
 142
 143 /* Deliver the interrupt of the corresponding priority, if possible. */
 144 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 145                                         unsigned int priority)
 146 {
 147         int allowed = 0;
 148         ulong uninitialized_var(msr_mask);
 149         bool update_esr = false, update_dear = false;
 150
 151         switch (priority) {
 152         case BOOKE_IRQPRIO_DTLB_MISS:
 153         case BOOKE_IRQPRIO_DATA_STORAGE:
 154                 update_dear = true;
 155                 /* fall through */
 156         case BOOKE_IRQPRIO_INST_STORAGE:
 157         case BOOKE_IRQPRIO_PROGRAM:
 158                 update_esr = true;
 159                 /* fall through */
 160         case BOOKE_IRQPRIO_ITLB_MISS:
 161         case BOOKE_IRQPRIO_SYSCALL:
 162         case BOOKE_IRQPRIO_FP_UNAVAIL:
 163         case BOOKE_IRQPRIO_SPE_UNAVAIL:
 164         case BOOKE_IRQPRIO_SPE_FP_DATA:
 165         case BOOKE_IRQPRIO_SPE_FP_ROUND:
 166         case BOOKE_IRQPRIO_AP_UNAVAIL:
 167         case BOOKE_IRQPRIO_ALIGNMENT:
 168                 allowed = 1;
 169                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 170                 break;
 171         case BOOKE_IRQPRIO_CRITICAL:
 172         case BOOKE_IRQPRIO_WATCHDOG:
 173                 allowed = vcpu->arch.shared->msr & MSR_CE;
 174                 msr_mask = MSR_ME;
 175                 break;
 176         case BOOKE_IRQPRIO_MACHINE_CHECK:
 177                 allowed = vcpu->arch.shared->msr & MSR_ME;
 178                 msr_mask = 0;
 179                 break;
 180         case BOOKE_IRQPRIO_EXTERNAL:
 181         case BOOKE_IRQPRIO_DECREMENTER:
 182         case BOOKE_IRQPRIO_FIT:
 183                 allowed = vcpu->arch.shared->msr & MSR_EE;
 184                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 185                 break;
 186         case BOOKE_IRQPRIO_DEBUG:
 187                 allowed = vcpu->arch.shared->msr & MSR_DE;
 188                 msr_mask = MSR_ME;
 189                 break;
 190         }
 191
 192         if (allowed) {
 193                 vcpu->arch.shared->srr0 = vcpu->arch.pc;
 194                 vcpu->arch.shared->srr1 = vcpu->arch.shared->msr;
 195                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 196                 if (update_esr == true)
 197                         vcpu->arch.esr = vcpu->arch.queued_esr;
 198                 if (update_dear == true)
 199                         vcpu->arch.shared->dar = vcpu->arch.queued_dear;
 200                 kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
 201
 202                 clear_bit(priority, &vcpu->arch.pending_exceptions);
 203         }
 204
 205         return allowed;
 206 }
 207
 208 /* Check pending exceptions and deliver one, if possible. */
 209 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 210 {
 211         unsigned long *pending = &vcpu->arch.pending_exceptions;
 212         unsigned int priority;
 213
 214         priority = __ffs(*pending);
 215         while (priority <= BOOKE_IRQPRIO_MAX) {
 216                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 217                         break;
 218
 219                 priority = find_next_bit(pending,
 220                                          BITS_PER_BYTE * sizeof(*pending),
 221                                          priority + 1);
 222         }
 223 }
 224
 225 /**
 226  * kvmppc_handle_exit
 227  *
 228  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 229  */
 230 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 231                        unsigned int exit_nr)
 232 {
 233         enum emulation_result er;
 234         int r = RESUME_HOST;
 235
 236         /* update before a new last_exit_type is rewritten */
 237         kvmppc_update_timing_stats(vcpu);
 238
 239         local_irq_enable();
 240
 241         run->exit_reason = KVM_EXIT_UNKNOWN;
 242         run->ready_for_interrupt_injection = 1;
 243
 244         switch (exit_nr) {
 245         case BOOKE_INTERRUPT_MACHINE_CHECK:
 246                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 247                 kvmppc_dump_vcpu(vcpu);
 248                 r = RESUME_HOST;
 249                 break;
 250
 251         case BOOKE_INTERRUPT_EXTERNAL:
 252                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 253                 if (need_resched())
 254                         cond_resched();
 255                 r = RESUME_GUEST;
 256                 break;
 257
 258         case BOOKE_INTERRUPT_DECREMENTER:
 259                 /* Since we switched IVPR back to the host's value, the host
 260                  * handled this interrupt the moment we enabled interrupts.
 261                  * Now we just offer it a chance to reschedule the guest. */
 262                 kvmppc_account_exit(vcpu, DEC_EXITS);
 263                 if (need_resched())
 264                         cond_resched();
 265                 r = RESUME_GUEST;
 266                 break;
 267
 268         case BOOKE_INTERRUPT_PROGRAM:
 269                 if (vcpu->arch.shared->msr & MSR_PR) {
 270                         /* Program traps generated by user-level software must be handled
 271                          * by the guest kernel. */
 272                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
 273                         r = RESUME_GUEST;
 274                         kvmppc_account_exit(vcpu, USR_PR_INST);
 275                         break;
 276                 }
 277
 278                 er = kvmppc_emulate_instruction(run, vcpu);
 279                 switch (er) {
 280                 case EMULATE_DONE:
 281                         /* don't overwrite subtypes, just account kvm_stats */
 282                         kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 283                         /* Future optimization: only reload non-volatiles if
 284                          * they were actually modified by emulation. */
 285                         r = RESUME_GUEST_NV;
 286                         break;
 287                 case EMULATE_DO_DCR:
 288                         run->exit_reason = KVM_EXIT_DCR;
 289                         r = RESUME_HOST;
 290                         break;
 291                 case EMULATE_FAIL:
 292                         /* XXX Deliver Program interrupt to guest. */
 293                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 294                                __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 295                         /* For debugging, encode the failing instruction and
 296                          * report it to userspace. */
 297                         run->hw.hardware_exit_reason = ~0ULL << 32;
 298                         run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 299                         r = RESUME_HOST;
 300                         break;
 301                 default:
 302                         BUG();
 303                 }
 304                 break;
 305
 306         case BOOKE_INTERRUPT_FP_UNAVAIL:
 307                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 308                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 309                 r = RESUME_GUEST;
 310                 break;
 311
 312         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 313                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
 314                 r = RESUME_GUEST;
 315                 break;
 316
 317         case BOOKE_INTERRUPT_SPE_FP_DATA:
 318                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 319                 r = RESUME_GUEST;
 320                 break;
 321
 322         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 323                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 324                 r = RESUME_GUEST;
 325                 break;
 326
 327         case BOOKE_INTERRUPT_DATA_STORAGE:
 328                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
 329                                                vcpu->arch.fault_esr);
 330                 kvmppc_account_exit(vcpu, DSI_EXITS);
 331                 r = RESUME_GUEST;
 332                 break;
 333
 334         case BOOKE_INTERRUPT_INST_STORAGE:
 335                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
 336                 kvmppc_account_exit(vcpu, ISI_EXITS);
 337                 r = RESUME_GUEST;
 338                 break;
 339
 340         case BOOKE_INTERRUPT_SYSCALL:
 341                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 342                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 343                 r = RESUME_GUEST;
 344                 break;
 345
 346         case BOOKE_INTERRUPT_DTLB_MISS: {
 347                 unsigned long eaddr = vcpu->arch.fault_dear;
 348                 int gtlb_index;
 349                 gpa_t gpaddr;
 350                 gfn_t gfn;
 351
 352                 /* Check the guest TLB. */
 353                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
 354                 if (gtlb_index < 0) {
 355                         /* The guest didn't have a mapping for it. */
 356                         kvmppc_core_queue_dtlb_miss(vcpu,
 357                                                     vcpu->arch.fault_dear,
 358                                                     vcpu->arch.fault_esr);
 359                         kvmppc_mmu_dtlb_miss(vcpu);
 360                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 361                         r = RESUME_GUEST;
 362                         break;
 363                 }
 364
 365                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 366                 gfn = gpaddr >> PAGE_SHIFT;
 367
 368                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 369                         /* The guest TLB had a mapping, but the shadow TLB
 370                          * didn't, and it is RAM. This could be because:
 371                          * a) the entry is mapping the host kernel, or
 372                          * b) the guest used a large mapping which we're faking
 373                          * Either way, we need to satisfy the fault without
 374                          * invoking the guest. */
 375                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 376                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 377                         r = RESUME_GUEST;
 378                 } else {
 379                         /* Guest has mapped and accessed a page which is not
 380                          * actually RAM. */
 381                         vcpu->arch.paddr_accessed = gpaddr;
 382                         r = kvmppc_emulate_mmio(run, vcpu);
 383                         kvmppc_account_exit(vcpu, MMIO_EXITS);
 384                 }
 385
 386                 break;
 387         }
 388
 389         case BOOKE_INTERRUPT_ITLB_MISS: {
 390                 unsigned long eaddr = vcpu->arch.pc;
 391                 gpa_t gpaddr;
 392                 gfn_t gfn;
 393                 int gtlb_index;
 394
 395                 r = RESUME_GUEST;
 396
 397                 /* Check the guest TLB. */
 398                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
 399                 if (gtlb_index < 0) {
 400                         /* The guest didn't have a mapping for it. */
 401                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 402                         kvmppc_mmu_itlb_miss(vcpu);
 403                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 404                         break;
 405                 }
 406
 407                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 408
 409                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 410                 gfn = gpaddr >> PAGE_SHIFT;
 411
 412                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 413                         /* The guest TLB had a mapping, but the shadow TLB
 414                          * didn't. This could be because:
 415                          * a) the entry is mapping the host kernel, or
 416                          * b) the guest used a large mapping which we're faking
 417                          * Either way, we need to satisfy the fault without
 418                          * invoking the guest. */
 419                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 420                 } else {
 421                         /* Guest mapped and leaped at non-RAM! */
 422                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 423                 }
 424
 425                 break;
 426         }
 427
 428         case BOOKE_INTERRUPT_DEBUG: {
 429                 u32 dbsr;
 430
 431                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 432
 433                 /* clear IAC events in DBSR register */
 434                 dbsr = mfspr(SPRN_DBSR);
 435                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 436                 mtspr(SPRN_DBSR, dbsr);
 437
 438                 run->exit_reason = KVM_EXIT_DEBUG;
 439                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
 440                 r = RESUME_HOST;
 441                 break;
 442         }
 443
 444         default:
 445                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 446                 BUG();
 447         }
 448
 449         local_irq_disable();
 450
 451         kvmppc_core_deliver_interrupts(vcpu);
 452
 453         if (!(r & RESUME_HOST)) {
 454                 /* To avoid clobbering exit_reason, only check for signals if
 455                  * we aren't already exiting to userspace for some other
 456                  * reason. */
 457                 if (signal_pending(current)) {
 458                         run->exit_reason = KVM_EXIT_INTR;
 459                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 460                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 461                 }
 462         }
 463
 464         return r;
 465 }
 466
 467 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 468 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 469 {
 470         vcpu->arch.pc = 0;
 471         vcpu->arch.shared->msr = 0;
 472         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
 473
 474         vcpu->arch.shadow_pid = 1;
 475
 476         /* Eye-catching number so we know if the guest takes an interrupt
 477          * before it's programmed its own IVPR. */
 478         vcpu->arch.ivpr = 0x55550000;
 479
 480         kvmppc_init_timing_stats(vcpu);
 481
 482         return kvmppc_core_vcpu_setup(vcpu);
 483 }
 484
 485 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 486 {
 487         int i;
 488
 489         regs->pc = vcpu->arch.pc;
 490         regs->cr = kvmppc_get_cr(vcpu);
 491         regs->ctr = vcpu->arch.ctr;
 492         regs->lr = vcpu->arch.lr;
 493         regs->xer = kvmppc_get_xer(vcpu);
 494         regs->msr = vcpu->arch.shared->msr;
 495         regs->srr0 = vcpu->arch.shared->srr0;
 496         regs->srr1 = vcpu->arch.shared->srr1;
 497         regs->pid = vcpu->arch.pid;
 498         regs->sprg0 = vcpu->arch.shared->sprg0;
 499         regs->sprg1 = vcpu->arch.shared->sprg1;
 500         regs->sprg2 = vcpu->arch.shared->sprg2;
 501         regs->sprg3 = vcpu->arch.shared->sprg3;
 502         regs->sprg5 = vcpu->arch.sprg4;
 503         regs->sprg6 = vcpu->arch.sprg5;
 504         regs->sprg7 = vcpu->arch.sprg6;
 505
 506         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 507                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 508
 509         return 0;
 510 }
 511
 512 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 513 {
 514         int i;
 515
 516         vcpu->arch.pc = regs->pc;
 517         kvmppc_set_cr(vcpu, regs->cr);
 518         vcpu->arch.ctr = regs->ctr;
 519         vcpu->arch.lr = regs->lr;
 520         kvmppc_set_xer(vcpu, regs->xer);
 521         kvmppc_set_msr(vcpu, regs->msr);
 522         vcpu->arch.shared->srr0 = regs->srr0;
 523         vcpu->arch.shared->srr1 = regs->srr1;
 524         vcpu->arch.shared->sprg0 = regs->sprg0;
 525         vcpu->arch.shared->sprg1 = regs->sprg1;
 526         vcpu->arch.shared->sprg2 = regs->sprg2;
 527         vcpu->arch.shared->sprg3 = regs->sprg3;
 528         vcpu->arch.sprg5 = regs->sprg4;
 529         vcpu->arch.sprg6 = regs->sprg5;
 530         vcpu->arch.sprg7 = regs->sprg6;
 531
 532         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 533                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 534
 535         return 0;
 536 }
 537
 538 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 539                                   struct kvm_sregs *sregs)
 540 {
 541         return -ENOTSUPP;
 542 }
 543
 544 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 545                                   struct kvm_sregs *sregs)
 546 {
 547         return -ENOTSUPP;
 548 }
 549
 550 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 551 {
 552         return -ENOTSUPP;
 553 }
 554
 555 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 556 {
 557         return -ENOTSUPP;
 558 }
 559
 560 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 561                                   struct kvm_translation *tr)
 562 {
 563         int r;
 564
 565         r = kvmppc_core_vcpu_translate(vcpu, tr);
 566         return r;
 567 }
 568
 569 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 570 {
 571         return -ENOTSUPP;
 572 }
 573
 574 int __init kvmppc_booke_init(void)
 575 {
 576         unsigned long ivor[16];
 577         unsigned long max_ivor = 0;
 578         int i;
 579
 580         /* We install our own exception handlers by hijacking IVPR. IVPR must
 581          * be 16-bit aligned, so we need a 64KB allocation. */
 582         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
 583                                                  VCPU_SIZE_ORDER);
 584         if (!kvmppc_booke_handlers)
 585                 return -ENOMEM;
 586
 587         /* XXX make sure our handlers are smaller than Linux's */
 588
 589         /* Copy our interrupt handlers to match host IVORs. That way we don't
 590          * have to swap the IVORs on every guest/host transition. */
 591         ivor[0] = mfspr(SPRN_IVOR0);
 592         ivor[1] = mfspr(SPRN_IVOR1);
 593         ivor[2] = mfspr(SPRN_IVOR2);
 594         ivor[3] = mfspr(SPRN_IVOR3);
 595         ivor[4] = mfspr(SPRN_IVOR4);
 596         ivor[5] = mfspr(SPRN_IVOR5);
 597         ivor[6] = mfspr(SPRN_IVOR6);
 598         ivor[7] = mfspr(SPRN_IVOR7);
 599         ivor[8] = mfspr(SPRN_IVOR8);
 600         ivor[9] = mfspr(SPRN_IVOR9);
 601         ivor[10] = mfspr(SPRN_IVOR10);
 602         ivor[11] = mfspr(SPRN_IVOR11);
 603         ivor[12] = mfspr(SPRN_IVOR12);
 604         ivor[13] = mfspr(SPRN_IVOR13);
 605         ivor[14] = mfspr(SPRN_IVOR14);
 606         ivor[15] = mfspr(SPRN_IVOR15);
 607
 608         for (i = 0; i < 16; i++) {
 609                 if (ivor[i] > max_ivor)
 610                         max_ivor = ivor[i];
 611
 612                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
 613                        kvmppc_handlers_start + i * kvmppc_handler_len,
 614                        kvmppc_handler_len);
 615         }
 616         flush_icache_range(kvmppc_booke_handlers,
 617                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 618
 619         return 0;
 620 }
 621
 622 void __exit kvmppc_booke_exit(void)
 623 {
 624         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
 625         kvm_exit();
 626 }