SAFE public projects git trees. - safe/jmp/linux-2.6/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/module.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/fs.h>
  27 #include <asm/cputable.h>
  28 #include <asm/uaccess.h>
  29 #include <asm/kvm_ppc.h>
  30 #include <asm/cacheflush.h>
  31
  32 #include "booke.h"
  33 #include "44x_tlb.h"
  34
  35 unsigned long kvmppc_booke_handlers;
  36
  37 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
  38 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  39
  40 struct kvm_stats_debugfs_item debugfs_entries[] = {
  41         { "mmio",       VCPU_STAT(mmio_exits) },
  42         { "dcr",        VCPU_STAT(dcr_exits) },
  43         { "sig",        VCPU_STAT(signal_exits) },
  44         { "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
  45         { "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
  46         { "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
  47         { "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
  48         { "sysc",       VCPU_STAT(syscall_exits) },
  49         { "isi",        VCPU_STAT(isi_exits) },
  50         { "dsi",        VCPU_STAT(dsi_exits) },
  51         { "inst_emu",   VCPU_STAT(emulated_inst_exits) },
  52         { "dec",        VCPU_STAT(dec_exits) },
  53         { "ext_intr",   VCPU_STAT(ext_intr_exits) },
  54         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  55         { NULL }
  56 };
  57
  58 static const u32 interrupt_msr_mask[16] = {
  59         [BOOKE_INTERRUPT_CRITICAL]      = MSR_ME,
  60         [BOOKE_INTERRUPT_MACHINE_CHECK] = 0,
  61         [BOOKE_INTERRUPT_DATA_STORAGE]  = MSR_CE|MSR_ME|MSR_DE,
  62         [BOOKE_INTERRUPT_INST_STORAGE]  = MSR_CE|MSR_ME|MSR_DE,
  63         [BOOKE_INTERRUPT_EXTERNAL]      = MSR_CE|MSR_ME|MSR_DE,
  64         [BOOKE_INTERRUPT_ALIGNMENT]     = MSR_CE|MSR_ME|MSR_DE,
  65         [BOOKE_INTERRUPT_PROGRAM]       = MSR_CE|MSR_ME|MSR_DE,
  66         [BOOKE_INTERRUPT_FP_UNAVAIL]    = MSR_CE|MSR_ME|MSR_DE,
  67         [BOOKE_INTERRUPT_SYSCALL]       = MSR_CE|MSR_ME|MSR_DE,
  68         [BOOKE_INTERRUPT_AP_UNAVAIL]    = MSR_CE|MSR_ME|MSR_DE,
  69         [BOOKE_INTERRUPT_DECREMENTER]   = MSR_CE|MSR_ME|MSR_DE,
  70         [BOOKE_INTERRUPT_FIT]           = MSR_CE|MSR_ME|MSR_DE,
  71         [BOOKE_INTERRUPT_WATCHDOG]      = MSR_ME,
  72         [BOOKE_INTERRUPT_DTLB_MISS]     = MSR_CE|MSR_ME|MSR_DE,
  73         [BOOKE_INTERRUPT_ITLB_MISS]     = MSR_CE|MSR_ME|MSR_DE,
  74         [BOOKE_INTERRUPT_DEBUG]         = MSR_ME,
  75 };
  76
  77 const unsigned char exception_priority[] = {
  78         [BOOKE_INTERRUPT_DATA_STORAGE] = 0,
  79         [BOOKE_INTERRUPT_INST_STORAGE] = 1,
  80         [BOOKE_INTERRUPT_ALIGNMENT] = 2,
  81         [BOOKE_INTERRUPT_PROGRAM] = 3,
  82         [BOOKE_INTERRUPT_FP_UNAVAIL] = 4,
  83         [BOOKE_INTERRUPT_SYSCALL] = 5,
  84         [BOOKE_INTERRUPT_AP_UNAVAIL] = 6,
  85         [BOOKE_INTERRUPT_DTLB_MISS] = 7,
  86         [BOOKE_INTERRUPT_ITLB_MISS] = 8,
  87         [BOOKE_INTERRUPT_MACHINE_CHECK] = 9,
  88         [BOOKE_INTERRUPT_DEBUG] = 10,
  89         [BOOKE_INTERRUPT_CRITICAL] = 11,
  90         [BOOKE_INTERRUPT_WATCHDOG] = 12,
  91         [BOOKE_INTERRUPT_EXTERNAL] = 13,
  92         [BOOKE_INTERRUPT_FIT] = 14,
  93         [BOOKE_INTERRUPT_DECREMENTER] = 15,
  94 };
  95
  96 const unsigned char priority_exception[] = {
  97         BOOKE_INTERRUPT_DATA_STORAGE,
  98         BOOKE_INTERRUPT_INST_STORAGE,
  99         BOOKE_INTERRUPT_ALIGNMENT,
 100         BOOKE_INTERRUPT_PROGRAM,
 101         BOOKE_INTERRUPT_FP_UNAVAIL,
 102         BOOKE_INTERRUPT_SYSCALL,
 103         BOOKE_INTERRUPT_AP_UNAVAIL,
 104         BOOKE_INTERRUPT_DTLB_MISS,
 105         BOOKE_INTERRUPT_ITLB_MISS,
 106         BOOKE_INTERRUPT_MACHINE_CHECK,
 107         BOOKE_INTERRUPT_DEBUG,
 108         BOOKE_INTERRUPT_CRITICAL,
 109         BOOKE_INTERRUPT_WATCHDOG,
 110         BOOKE_INTERRUPT_EXTERNAL,
 111         BOOKE_INTERRUPT_FIT,
 112         BOOKE_INTERRUPT_DECREMENTER,
 113 };
 114
 115
 116 /* TODO: use vcpu_printf() */
 117 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
 118 {
 119         int i;
 120
 121         printk("pc:   %08lx msr:  %08lx\n", vcpu->arch.pc, vcpu->arch.msr);
 122         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
 123         printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1);
 124
 125         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
 126
 127         for (i = 0; i < 32; i += 4) {
 128                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
 129                        vcpu->arch.gpr[i],
 130                        vcpu->arch.gpr[i+1],
 131                        vcpu->arch.gpr[i+2],
 132                        vcpu->arch.gpr[i+3]);
 133         }
 134 }
 135
 136 static void kvmppc_booke_queue_exception(struct kvm_vcpu *vcpu, int exception)
 137 {
 138         unsigned int priority = exception_priority[exception];
 139         set_bit(priority, &vcpu->arch.pending_exceptions);
 140 }
 141
 142 static void kvmppc_booke_clear_exception(struct kvm_vcpu *vcpu, int exception)
 143 {
 144         unsigned int priority = exception_priority[exception];
 145         clear_bit(priority, &vcpu->arch.pending_exceptions);
 146 }
 147
 148 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
 149 {
 150         kvmppc_booke_queue_exception(vcpu, BOOKE_INTERRUPT_PROGRAM);
 151 }
 152
 153 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 154 {
 155         kvmppc_booke_queue_exception(vcpu, BOOKE_INTERRUPT_DECREMENTER);
 156 }
 157
 158 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 159 {
 160         unsigned int priority = exception_priority[BOOKE_INTERRUPT_DECREMENTER];
 161         return test_bit(priority, &vcpu->arch.pending_exceptions);
 162 }
 163
 164 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 165                                 struct kvm_interrupt *irq)
 166 {
 167         kvmppc_booke_queue_exception(vcpu, BOOKE_INTERRUPT_EXTERNAL);
 168 }
 169
 170 /* Check if we are ready to deliver the interrupt */
 171 static int kvmppc_can_deliver_interrupt(struct kvm_vcpu *vcpu, int interrupt)
 172 {
 173         int r;
 174
 175         switch (interrupt) {
 176         case BOOKE_INTERRUPT_CRITICAL:
 177                 r = vcpu->arch.msr & MSR_CE;
 178                 break;
 179         case BOOKE_INTERRUPT_MACHINE_CHECK:
 180                 r = vcpu->arch.msr & MSR_ME;
 181                 break;
 182         case BOOKE_INTERRUPT_EXTERNAL:
 183                 r = vcpu->arch.msr & MSR_EE;
 184                 break;
 185         case BOOKE_INTERRUPT_DECREMENTER:
 186                 r = vcpu->arch.msr & MSR_EE;
 187                 break;
 188         case BOOKE_INTERRUPT_FIT:
 189                 r = vcpu->arch.msr & MSR_EE;
 190                 break;
 191         case BOOKE_INTERRUPT_WATCHDOG:
 192                 r = vcpu->arch.msr & MSR_CE;
 193                 break;
 194         case BOOKE_INTERRUPT_DEBUG:
 195                 r = vcpu->arch.msr & MSR_DE;
 196                 break;
 197         default:
 198                 r = 1;
 199         }
 200
 201         return r;
 202 }
 203
 204 static void kvmppc_booke_deliver_interrupt(struct kvm_vcpu *vcpu, int interrupt)
 205 {
 206         switch (interrupt) {
 207         case BOOKE_INTERRUPT_DECREMENTER:
 208                 vcpu->arch.tsr |= TSR_DIS;
 209                 break;
 210         }
 211
 212         vcpu->arch.srr0 = vcpu->arch.pc;
 213         vcpu->arch.srr1 = vcpu->arch.msr;
 214         vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[interrupt];
 215         kvmppc_set_msr(vcpu, vcpu->arch.msr & interrupt_msr_mask[interrupt]);
 216 }
 217
 218 /* Check pending exceptions and deliver one, if possible. */
 219 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 220 {
 221         unsigned long *pending = &vcpu->arch.pending_exceptions;
 222         unsigned int exception;
 223         unsigned int priority;
 224
 225         priority = __ffs(*pending);
 226         while (priority <= BOOKE_MAX_INTERRUPT) {
 227                 exception = priority_exception[priority];
 228                 if (kvmppc_can_deliver_interrupt(vcpu, exception)) {
 229                         kvmppc_booke_clear_exception(vcpu, exception);
 230                         kvmppc_booke_deliver_interrupt(vcpu, exception);
 231                         break;
 232                 }
 233
 234                 priority = find_next_bit(pending,
 235                                          BITS_PER_BYTE * sizeof(*pending),
 236                                          priority + 1);
 237         }
 238 }
 239
 240 /**
 241  * kvmppc_handle_exit
 242  *
 243  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 244  */
 245 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 246                        unsigned int exit_nr)
 247 {
 248         enum emulation_result er;
 249         int r = RESUME_HOST;
 250
 251         local_irq_enable();
 252
 253         run->exit_reason = KVM_EXIT_UNKNOWN;
 254         run->ready_for_interrupt_injection = 1;
 255
 256         switch (exit_nr) {
 257         case BOOKE_INTERRUPT_MACHINE_CHECK:
 258                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 259                 kvmppc_dump_vcpu(vcpu);
 260                 r = RESUME_HOST;
 261                 break;
 262
 263         case BOOKE_INTERRUPT_EXTERNAL:
 264                 vcpu->stat.ext_intr_exits++;
 265                 if (need_resched())
 266                         cond_resched();
 267                 r = RESUME_GUEST;
 268                 break;
 269
 270         case BOOKE_INTERRUPT_DECREMENTER:
 271                 /* Since we switched IVPR back to the host's value, the host
 272                  * handled this interrupt the moment we enabled interrupts.
 273                  * Now we just offer it a chance to reschedule the guest. */
 274
 275                 /* XXX At this point the TLB still holds our shadow TLB, so if
 276                  * we do reschedule the host will fault over it. Perhaps we
 277                  * should politely restore the host's entries to minimize
 278                  * misses before ceding control. */
 279                 vcpu->stat.dec_exits++;
 280                 if (need_resched())
 281                         cond_resched();
 282                 r = RESUME_GUEST;
 283                 break;
 284
 285         case BOOKE_INTERRUPT_PROGRAM:
 286                 if (vcpu->arch.msr & MSR_PR) {
 287                         /* Program traps generated by user-level software must be handled
 288                          * by the guest kernel. */
 289                         vcpu->arch.esr = vcpu->arch.fault_esr;
 290                         kvmppc_booke_queue_exception(vcpu, BOOKE_INTERRUPT_PROGRAM);
 291                         r = RESUME_GUEST;
 292                         break;
 293                 }
 294
 295                 er = kvmppc_emulate_instruction(run, vcpu);
 296                 switch (er) {
 297                 case EMULATE_DONE:
 298                         /* Future optimization: only reload non-volatiles if
 299                          * they were actually modified by emulation. */
 300                         vcpu->stat.emulated_inst_exits++;
 301                         r = RESUME_GUEST_NV;
 302                         break;
 303                 case EMULATE_DO_DCR:
 304                         run->exit_reason = KVM_EXIT_DCR;
 305                         vcpu->stat.dcr_exits++;
 306                         r = RESUME_HOST;
 307                         break;
 308                 case EMULATE_FAIL:
 309                         /* XXX Deliver Program interrupt to guest. */
 310                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 311                                __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 312                         /* For debugging, encode the failing instruction and
 313                          * report it to userspace. */
 314                         run->hw.hardware_exit_reason = ~0ULL << 32;
 315                         run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 316                         r = RESUME_HOST;
 317                         break;
 318                 default:
 319                         BUG();
 320                 }
 321                 break;
 322
 323         case BOOKE_INTERRUPT_FP_UNAVAIL:
 324                 kvmppc_booke_queue_exception(vcpu, exit_nr);
 325                 r = RESUME_GUEST;
 326                 break;
 327
 328         case BOOKE_INTERRUPT_DATA_STORAGE:
 329                 vcpu->arch.dear = vcpu->arch.fault_dear;
 330                 vcpu->arch.esr = vcpu->arch.fault_esr;
 331                 kvmppc_booke_queue_exception(vcpu, exit_nr);
 332                 vcpu->stat.dsi_exits++;
 333                 r = RESUME_GUEST;
 334                 break;
 335
 336         case BOOKE_INTERRUPT_INST_STORAGE:
 337                 vcpu->arch.esr = vcpu->arch.fault_esr;
 338                 kvmppc_booke_queue_exception(vcpu, exit_nr);
 339                 vcpu->stat.isi_exits++;
 340                 r = RESUME_GUEST;
 341                 break;
 342
 343         case BOOKE_INTERRUPT_SYSCALL:
 344                 kvmppc_booke_queue_exception(vcpu, exit_nr);
 345                 vcpu->stat.syscall_exits++;
 346                 r = RESUME_GUEST;
 347                 break;
 348
 349         case BOOKE_INTERRUPT_DTLB_MISS: {
 350                 struct kvmppc_44x_tlbe *gtlbe;
 351                 unsigned long eaddr = vcpu->arch.fault_dear;
 352                 gfn_t gfn;
 353
 354                 /* Check the guest TLB. */
 355                 gtlbe = kvmppc_44x_dtlb_search(vcpu, eaddr);
 356                 if (!gtlbe) {
 357                         /* The guest didn't have a mapping for it. */
 358                         kvmppc_booke_queue_exception(vcpu, exit_nr);
 359                         vcpu->arch.dear = vcpu->arch.fault_dear;
 360                         vcpu->arch.esr = vcpu->arch.fault_esr;
 361                         vcpu->stat.dtlb_real_miss_exits++;
 362                         r = RESUME_GUEST;
 363                         break;
 364                 }
 365
 366                 vcpu->arch.paddr_accessed = tlb_xlate(gtlbe, eaddr);
 367                 gfn = vcpu->arch.paddr_accessed >> PAGE_SHIFT;
 368
 369                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 370                         /* The guest TLB had a mapping, but the shadow TLB
 371                          * didn't, and it is RAM. This could be because:
 372                          * a) the entry is mapping the host kernel, or
 373                          * b) the guest used a large mapping which we're faking
 374                          * Either way, we need to satisfy the fault without
 375                          * invoking the guest. */
 376                         kvmppc_mmu_map(vcpu, eaddr, gfn, gtlbe->tid,
 377                                        gtlbe->word2);
 378                         vcpu->stat.dtlb_virt_miss_exits++;
 379                         r = RESUME_GUEST;
 380                 } else {
 381                         /* Guest has mapped and accessed a page which is not
 382                          * actually RAM. */
 383                         r = kvmppc_emulate_mmio(run, vcpu);
 384                         vcpu->stat.mmio_exits++;
 385                 }
 386
 387                 break;
 388         }
 389
 390         case BOOKE_INTERRUPT_ITLB_MISS: {
 391                 struct kvmppc_44x_tlbe *gtlbe;
 392                 unsigned long eaddr = vcpu->arch.pc;
 393                 gfn_t gfn;
 394
 395                 r = RESUME_GUEST;
 396
 397                 /* Check the guest TLB. */
 398                 gtlbe = kvmppc_44x_itlb_search(vcpu, eaddr);
 399                 if (!gtlbe) {
 400                         /* The guest didn't have a mapping for it. */
 401                         kvmppc_booke_queue_exception(vcpu, exit_nr);
 402                         vcpu->stat.itlb_real_miss_exits++;
 403                         break;
 404                 }
 405
 406                 vcpu->stat.itlb_virt_miss_exits++;
 407
 408                 gfn = tlb_xlate(gtlbe, eaddr) >> PAGE_SHIFT;
 409
 410                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 411                         /* The guest TLB had a mapping, but the shadow TLB
 412                          * didn't. This could be because:
 413                          * a) the entry is mapping the host kernel, or
 414                          * b) the guest used a large mapping which we're faking
 415                          * Either way, we need to satisfy the fault without
 416                          * invoking the guest. */
 417                         kvmppc_mmu_map(vcpu, eaddr, gfn, gtlbe->tid,
 418                                        gtlbe->word2);
 419                 } else {
 420                         /* Guest mapped and leaped at non-RAM! */
 421                         kvmppc_booke_queue_exception(vcpu, BOOKE_INTERRUPT_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                 r = RESUME_HOST;
 439                 break;
 440         }
 441
 442         default:
 443                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 444                 BUG();
 445         }
 446
 447         local_irq_disable();
 448
 449         kvmppc_core_deliver_interrupts(vcpu);
 450
 451         if (!(r & RESUME_HOST)) {
 452                 /* To avoid clobbering exit_reason, only check for signals if
 453                  * we aren't already exiting to userspace for some other
 454                  * reason. */
 455                 if (signal_pending(current)) {
 456                         run->exit_reason = KVM_EXIT_INTR;
 457                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 458                         vcpu->stat.signal_exits++;
 459                 }
 460         }
 461
 462         return r;
 463 }
 464
 465 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 466 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 467 {
 468         vcpu->arch.pc = 0;
 469         vcpu->arch.msr = 0;
 470         vcpu->arch.gpr[1] = (16<<20) - 8; /* -8 for the callee-save LR slot */
 471
 472         vcpu->arch.shadow_pid = 1;
 473
 474         /* Eye-catching number so we know if the guest takes an interrupt
 475          * before it's programmed its own IVPR. */
 476         vcpu->arch.ivpr = 0x55550000;
 477
 478         return kvmppc_core_vcpu_setup(vcpu);
 479 }
 480
 481 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 482 {
 483         int i;
 484
 485         regs->pc = vcpu->arch.pc;
 486         regs->cr = vcpu->arch.cr;
 487         regs->ctr = vcpu->arch.ctr;
 488         regs->lr = vcpu->arch.lr;
 489         regs->xer = vcpu->arch.xer;
 490         regs->msr = vcpu->arch.msr;
 491         regs->srr0 = vcpu->arch.srr0;
 492         regs->srr1 = vcpu->arch.srr1;
 493         regs->pid = vcpu->arch.pid;
 494         regs->sprg0 = vcpu->arch.sprg0;
 495         regs->sprg1 = vcpu->arch.sprg1;
 496         regs->sprg2 = vcpu->arch.sprg2;
 497         regs->sprg3 = vcpu->arch.sprg3;
 498         regs->sprg5 = vcpu->arch.sprg4;
 499         regs->sprg6 = vcpu->arch.sprg5;
 500         regs->sprg7 = vcpu->arch.sprg6;
 501
 502         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 503                 regs->gpr[i] = vcpu->arch.gpr[i];
 504
 505         return 0;
 506 }
 507
 508 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 509 {
 510         int i;
 511
 512         vcpu->arch.pc = regs->pc;
 513         vcpu->arch.cr = regs->cr;
 514         vcpu->arch.ctr = regs->ctr;
 515         vcpu->arch.lr = regs->lr;
 516         vcpu->arch.xer = regs->xer;
 517         kvmppc_set_msr(vcpu, regs->msr);
 518         vcpu->arch.srr0 = regs->srr0;
 519         vcpu->arch.srr1 = regs->srr1;
 520         vcpu->arch.sprg0 = regs->sprg0;
 521         vcpu->arch.sprg1 = regs->sprg1;
 522         vcpu->arch.sprg2 = regs->sprg2;
 523         vcpu->arch.sprg3 = regs->sprg3;
 524         vcpu->arch.sprg5 = regs->sprg4;
 525         vcpu->arch.sprg6 = regs->sprg5;
 526         vcpu->arch.sprg7 = regs->sprg6;
 527
 528         for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
 529                 vcpu->arch.gpr[i] = regs->gpr[i];
 530
 531         return 0;
 532 }
 533
 534 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 535                                   struct kvm_sregs *sregs)
 536 {
 537         return -ENOTSUPP;
 538 }
 539
 540 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 541                                   struct kvm_sregs *sregs)
 542 {
 543         return -ENOTSUPP;
 544 }
 545
 546 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 547 {
 548         return -ENOTSUPP;
 549 }
 550
 551 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 552 {
 553         return -ENOTSUPP;
 554 }
 555
 556 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 557                                   struct kvm_translation *tr)
 558 {
 559         return kvmppc_core_vcpu_translate(vcpu, tr);
 560 }
 561
 562 int kvmppc_booke_init(void)
 563 {
 564         unsigned long ivor[16];
 565         unsigned long max_ivor = 0;
 566         int i;
 567
 568         /* We install our own exception handlers by hijacking IVPR. IVPR must
 569          * be 16-bit aligned, so we need a 64KB allocation. */
 570         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
 571                                                  VCPU_SIZE_ORDER);
 572         if (!kvmppc_booke_handlers)
 573                 return -ENOMEM;
 574
 575         /* XXX make sure our handlers are smaller than Linux's */
 576
 577         /* Copy our interrupt handlers to match host IVORs. That way we don't
 578          * have to swap the IVORs on every guest/host transition. */
 579         ivor[0] = mfspr(SPRN_IVOR0);
 580         ivor[1] = mfspr(SPRN_IVOR1);
 581         ivor[2] = mfspr(SPRN_IVOR2);
 582         ivor[3] = mfspr(SPRN_IVOR3);
 583         ivor[4] = mfspr(SPRN_IVOR4);
 584         ivor[5] = mfspr(SPRN_IVOR5);
 585         ivor[6] = mfspr(SPRN_IVOR6);
 586         ivor[7] = mfspr(SPRN_IVOR7);
 587         ivor[8] = mfspr(SPRN_IVOR8);
 588         ivor[9] = mfspr(SPRN_IVOR9);
 589         ivor[10] = mfspr(SPRN_IVOR10);
 590         ivor[11] = mfspr(SPRN_IVOR11);
 591         ivor[12] = mfspr(SPRN_IVOR12);
 592         ivor[13] = mfspr(SPRN_IVOR13);
 593         ivor[14] = mfspr(SPRN_IVOR14);
 594         ivor[15] = mfspr(SPRN_IVOR15);
 595
 596         for (i = 0; i < 16; i++) {
 597                 if (ivor[i] > max_ivor)
 598                         max_ivor = ivor[i];
 599
 600                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
 601                        kvmppc_handlers_start + i * kvmppc_handler_len,
 602                        kvmppc_handler_len);
 603         }
 604         flush_icache_range(kvmppc_booke_handlers,
 605                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 606
 607         return 0;
 608 }
 609
 610 void __exit kvmppc_booke_exit(void)
 611 {
 612         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
 613         kvm_exit();
 614 }