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         ulong crit_raw = vcpu->arch.shared->critical;
 151         ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
 152         bool crit;
 153
 154         /* Truncate crit indicators in 32 bit mode */
 155         if (!(vcpu->arch.shared->msr & MSR_SF)) {
 156                 crit_raw &= 0xffffffff;
 157                 crit_r1 &= 0xffffffff;
 158         }
 159
 160         /* Critical section when crit == r1 */
 161         crit = (crit_raw == crit_r1);
 162         /* ... and we're in supervisor mode */
 163         crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 164
 165         switch (priority) {
 166         case BOOKE_IRQPRIO_DTLB_MISS:
 167         case BOOKE_IRQPRIO_DATA_STORAGE:
 168                 update_dear = true;
 169                 /* fall through */
 170         case BOOKE_IRQPRIO_INST_STORAGE:
 171         case BOOKE_IRQPRIO_PROGRAM:
 172                 update_esr = true;
 173                 /* fall through */
 174         case BOOKE_IRQPRIO_ITLB_MISS:
 175         case BOOKE_IRQPRIO_SYSCALL:
 176         case BOOKE_IRQPRIO_FP_UNAVAIL:
 177         case BOOKE_IRQPRIO_SPE_UNAVAIL:
 178         case BOOKE_IRQPRIO_SPE_FP_DATA:
 179         case BOOKE_IRQPRIO_SPE_FP_ROUND:
 180         case BOOKE_IRQPRIO_AP_UNAVAIL:
 181         case BOOKE_IRQPRIO_ALIGNMENT:
 182                 allowed = 1;
 183                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 184                 break;
 185         case BOOKE_IRQPRIO_CRITICAL:
 186         case BOOKE_IRQPRIO_WATCHDOG:
 187                 allowed = vcpu->arch.shared->msr & MSR_CE;
 188                 msr_mask = MSR_ME;
 189                 break;
 190         case BOOKE_IRQPRIO_MACHINE_CHECK:
 191                 allowed = vcpu->arch.shared->msr & MSR_ME;
 192                 msr_mask = 0;
 193                 break;
 194         case BOOKE_IRQPRIO_EXTERNAL:
 195         case BOOKE_IRQPRIO_DECREMENTER:
 196         case BOOKE_IRQPRIO_FIT:
 197                 allowed = vcpu->arch.shared->msr & MSR_EE;
 198                 allowed = allowed && !crit;
 199                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
 200                 break;
 201         case BOOKE_IRQPRIO_DEBUG:
 202                 allowed = vcpu->arch.shared->msr & MSR_DE;
 203                 msr_mask = MSR_ME;
 204                 break;
 205         }
 206
 207         if (allowed) {
 208                 vcpu->arch.shared->srr0 = vcpu->arch.pc;
 209                 vcpu->arch.shared->srr1 = vcpu->arch.shared->msr;
 210                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 211                 if (update_esr == true)
 212                         vcpu->arch.esr = vcpu->arch.queued_esr;
 213                 if (update_dear == true)
 214                         vcpu->arch.shared->dar = vcpu->arch.queued_dear;
 215                 kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
 216
 217                 clear_bit(priority, &vcpu->arch.pending_exceptions);
 218         }
 219
 220         return allowed;
 221 }
 222
 223 /* Check pending exceptions and deliver one, if possible. */
 224 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 225 {
 226         unsigned long *pending = &vcpu->arch.pending_exceptions;
 227         unsigned int priority;
 228
 229         priority = __ffs(*pending);
 230         while (priority <= BOOKE_IRQPRIO_MAX) {
 231                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 232                         break;
 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         /* update before a new last_exit_type is rewritten */
 252         kvmppc_update_timing_stats(vcpu);
 253
 254         local_irq_enable();
 255
 256         run->exit_reason = KVM_EXIT_UNKNOWN;
 257         run->ready_for_interrupt_injection = 1;
 258
 259         switch (exit_nr) {
 260         case BOOKE_INTERRUPT_MACHINE_CHECK:
 261                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 262                 kvmppc_dump_vcpu(vcpu);
 263                 r = RESUME_HOST;
 264                 break;
 265
 266         case BOOKE_INTERRUPT_EXTERNAL:
 267                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 268                 if (need_resched())
 269                         cond_resched();
 270                 r = RESUME_GUEST;
 271                 break;
 272
 273         case BOOKE_INTERRUPT_DECREMENTER:
 274                 /* Since we switched IVPR back to the host's value, the host
 275                  * handled this interrupt the moment we enabled interrupts.
 276                  * Now we just offer it a chance to reschedule the guest. */
 277                 kvmppc_account_exit(vcpu, DEC_EXITS);
 278                 if (need_resched())
 279                         cond_resched();
 280                 r = RESUME_GUEST;
 281                 break;
 282
 283         case BOOKE_INTERRUPT_PROGRAM:
 284                 if (vcpu->arch.shared->msr & MSR_PR) {
 285                         /* Program traps generated by user-level software must be handled
 286                          * by the guest kernel. */
 287                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
 288                         r = RESUME_GUEST;
 289                         kvmppc_account_exit(vcpu, USR_PR_INST);
 290                         break;
 291                 }
 292
 293                 er = kvmppc_emulate_instruction(run, vcpu);
 294                 switch (er) {
 295                 case EMULATE_DONE:
 296                         /* don't overwrite subtypes, just account kvm_stats */
 297                         kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 298                         /* Future optimization: only reload non-volatiles if
 299                          * they were actually modified by emulation. */
 300                         r = RESUME_GUEST_NV;
 301                         break;
 302                 case EMULATE_DO_DCR:
 303                         run->exit_reason = KVM_EXIT_DCR;
 304                         r = RESUME_HOST;
 305                         break;
 306                 case EMULATE_FAIL:
 307                         /* XXX Deliver Program interrupt to guest. */
 308                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 309                                __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 310                         /* For debugging, encode the failing instruction and
 311                          * report it to userspace. */
 312                         run->hw.hardware_exit_reason = ~0ULL << 32;
 313                         run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 314                         r = RESUME_HOST;
 315                         break;
 316                 default:
 317                         BUG();
 318                 }
 319                 break;
 320
 321         case BOOKE_INTERRUPT_FP_UNAVAIL:
 322                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 323                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 324                 r = RESUME_GUEST;
 325                 break;
 326
 327         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 328                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
 329                 r = RESUME_GUEST;
 330                 break;
 331
 332         case BOOKE_INTERRUPT_SPE_FP_DATA:
 333                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 334                 r = RESUME_GUEST;
 335                 break;
 336
 337         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 338                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 339                 r = RESUME_GUEST;
 340                 break;
 341
 342         case BOOKE_INTERRUPT_DATA_STORAGE:
 343                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
 344                                                vcpu->arch.fault_esr);
 345                 kvmppc_account_exit(vcpu, DSI_EXITS);
 346                 r = RESUME_GUEST;
 347                 break;
 348
 349         case BOOKE_INTERRUPT_INST_STORAGE:
 350                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
 351                 kvmppc_account_exit(vcpu, ISI_EXITS);
 352                 r = RESUME_GUEST;
 353                 break;
 354
 355         case BOOKE_INTERRUPT_SYSCALL:
 356                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
 357                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
 358                         /* KVM PV hypercalls */
 359                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 360                         r = RESUME_GUEST;
 361                 } else {
 362                         /* Guest syscalls */
 363                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 364                 }
 365                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 366                 r = RESUME_GUEST;
 367                 break;
 368
 369         case BOOKE_INTERRUPT_DTLB_MISS: {
 370                 unsigned long eaddr = vcpu->arch.fault_dear;
 371                 int gtlb_index;
 372                 gpa_t gpaddr;
 373                 gfn_t gfn;
 374
 375                 /* Check the guest TLB. */
 376                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
 377                 if (gtlb_index < 0) {
 378                         /* The guest didn't have a mapping for it. */
 379                         kvmppc_core_queue_dtlb_miss(vcpu,
 380                                                     vcpu->arch.fault_dear,
 381                                                     vcpu->arch.fault_esr);
 382                         kvmppc_mmu_dtlb_miss(vcpu);
 383                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 384                         r = RESUME_GUEST;
 385                         break;
 386                 }
 387
 388                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 389                 gfn = gpaddr >> PAGE_SHIFT;
 390
 391                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 392                         /* The guest TLB had a mapping, but the shadow TLB
 393                          * didn't, and it is RAM. This could be because:
 394                          * a) the entry is mapping the host kernel, or
 395                          * b) the guest used a large mapping which we're faking
 396                          * Either way, we need to satisfy the fault without
 397                          * invoking the guest. */
 398                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 399                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 400                         r = RESUME_GUEST;
 401                 } else {
 402                         /* Guest has mapped and accessed a page which is not
 403                          * actually RAM. */
 404                         vcpu->arch.paddr_accessed = gpaddr;
 405                         r = kvmppc_emulate_mmio(run, vcpu);
 406                         kvmppc_account_exit(vcpu, MMIO_EXITS);
 407                 }
 408
 409                 break;
 410         }
 411
 412         case BOOKE_INTERRUPT_ITLB_MISS: {
 413                 unsigned long eaddr = vcpu->arch.pc;
 414                 gpa_t gpaddr;
 415                 gfn_t gfn;
 416                 int gtlb_index;
 417
 418                 r = RESUME_GUEST;
 419
 420                 /* Check the guest TLB. */
 421                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
 422                 if (gtlb_index < 0) {
 423                         /* The guest didn't have a mapping for it. */
 424                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 425                         kvmppc_mmu_itlb_miss(vcpu);
 426                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 427                         break;
 428                 }
 429
 430                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 431
 432                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 433                 gfn = gpaddr >> PAGE_SHIFT;
 434
 435                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 436                         /* The guest TLB had a mapping, but the shadow TLB
 437                          * didn't. This could be because:
 438                          * a) the entry is mapping the host kernel, or
 439                          * b) the guest used a large mapping which we're faking
 440                          * Either way, we need to satisfy the fault without
 441                          * invoking the guest. */
 442                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 443                 } else {
 444                         /* Guest mapped and leaped at non-RAM! */
 445                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 446                 }
 447
 448                 break;
 449         }
 450
 451         case BOOKE_INTERRUPT_DEBUG: {
 452                 u32 dbsr;
 453
 454                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 455
 456                 /* clear IAC events in DBSR register */
 457                 dbsr = mfspr(SPRN_DBSR);
 458                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 459                 mtspr(SPRN_DBSR, dbsr);
 460
 461                 run->exit_reason = KVM_EXIT_DEBUG;
 462                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
 463                 r = RESUME_HOST;
 464                 break;
 465         }
 466
 467         default:
 468                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 469                 BUG();
 470         }
 471
 472         local_irq_disable();
 473
 474         kvmppc_core_deliver_interrupts(vcpu);
 475
 476         if (!(r & RESUME_HOST)) {
 477                 /* To avoid clobbering exit_reason, only check for signals if
 478                  * we aren't already exiting to userspace for some other
 479                  * reason. */
 480                 if (signal_pending(current)) {
 481                         run->exit_reason = KVM_EXIT_INTR;
 482                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 483                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 484                 }
 485         }
 486
 487         return r;
 488 }
 489
 490 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 491 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 492 {
 493         vcpu->arch.pc = 0;
 494         vcpu->arch.shared->msr = 0;
 495         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
 496
 497         vcpu->arch.shadow_pid = 1;
 498
 499         /* Eye-catching number so we know if the guest takes an interrupt
 500          * before it's programmed its own IVPR. */
 501         vcpu->arch.ivpr = 0x55550000;
 502
 503         kvmppc_init_timing_stats(vcpu);
 504
 505         return kvmppc_core_vcpu_setup(vcpu);
 506 }
 507
 508 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 509 {
 510         int i;
 511
 512         regs->pc = vcpu->arch.pc;
 513         regs->cr = kvmppc_get_cr(vcpu);
 514         regs->ctr = vcpu->arch.ctr;
 515         regs->lr = vcpu->arch.lr;
 516         regs->xer = kvmppc_get_xer(vcpu);
 517         regs->msr = vcpu->arch.shared->msr;
 518         regs->srr0 = vcpu->arch.shared->srr0;
 519         regs->srr1 = vcpu->arch.shared->srr1;
 520         regs->pid = vcpu->arch.pid;
 521         regs->sprg0 = vcpu->arch.shared->sprg0;
 522         regs->sprg1 = vcpu->arch.shared->sprg1;
 523         regs->sprg2 = vcpu->arch.shared->sprg2;
 524         regs->sprg3 = vcpu->arch.shared->sprg3;
 525         regs->sprg5 = vcpu->arch.sprg4;
 526         regs->sprg6 = vcpu->arch.sprg5;
 527         regs->sprg7 = vcpu->arch.sprg6;
 528
 529         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 530                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 531
 532         return 0;
 533 }
 534
 535 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 536 {
 537         int i;
 538
 539         vcpu->arch.pc = regs->pc;
 540         kvmppc_set_cr(vcpu, regs->cr);
 541         vcpu->arch.ctr = regs->ctr;
 542         vcpu->arch.lr = regs->lr;
 543         kvmppc_set_xer(vcpu, regs->xer);
 544         kvmppc_set_msr(vcpu, regs->msr);
 545         vcpu->arch.shared->srr0 = regs->srr0;
 546         vcpu->arch.shared->srr1 = regs->srr1;
 547         vcpu->arch.shared->sprg0 = regs->sprg0;
 548         vcpu->arch.shared->sprg1 = regs->sprg1;
 549         vcpu->arch.shared->sprg2 = regs->sprg2;
 550         vcpu->arch.shared->sprg3 = regs->sprg3;
 551         vcpu->arch.sprg5 = regs->sprg4;
 552         vcpu->arch.sprg6 = regs->sprg5;
 553         vcpu->arch.sprg7 = regs->sprg6;
 554
 555         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 556                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 557
 558         return 0;
 559 }
 560
 561 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 562                                   struct kvm_sregs *sregs)
 563 {
 564         return -ENOTSUPP;
 565 }
 566
 567 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 568                                   struct kvm_sregs *sregs)
 569 {
 570         return -ENOTSUPP;
 571 }
 572
 573 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 574 {
 575         return -ENOTSUPP;
 576 }
 577
 578 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 579 {
 580         return -ENOTSUPP;
 581 }
 582
 583 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 584                                   struct kvm_translation *tr)
 585 {
 586         int r;
 587
 588         r = kvmppc_core_vcpu_translate(vcpu, tr);
 589         return r;
 590 }
 591
 592 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 593 {
 594         return -ENOTSUPP;
 595 }
 596
 597 int __init kvmppc_booke_init(void)
 598 {
 599         unsigned long ivor[16];
 600         unsigned long max_ivor = 0;
 601         int i;
 602
 603         /* We install our own exception handlers by hijacking IVPR. IVPR must
 604          * be 16-bit aligned, so we need a 64KB allocation. */
 605         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
 606                                                  VCPU_SIZE_ORDER);
 607         if (!kvmppc_booke_handlers)
 608                 return -ENOMEM;
 609
 610         /* XXX make sure our handlers are smaller than Linux's */
 611
 612         /* Copy our interrupt handlers to match host IVORs. That way we don't
 613          * have to swap the IVORs on every guest/host transition. */
 614         ivor[0] = mfspr(SPRN_IVOR0);
 615         ivor[1] = mfspr(SPRN_IVOR1);
 616         ivor[2] = mfspr(SPRN_IVOR2);
 617         ivor[3] = mfspr(SPRN_IVOR3);
 618         ivor[4] = mfspr(SPRN_IVOR4);
 619         ivor[5] = mfspr(SPRN_IVOR5);
 620         ivor[6] = mfspr(SPRN_IVOR6);
 621         ivor[7] = mfspr(SPRN_IVOR7);
 622         ivor[8] = mfspr(SPRN_IVOR8);
 623         ivor[9] = mfspr(SPRN_IVOR9);
 624         ivor[10] = mfspr(SPRN_IVOR10);
 625         ivor[11] = mfspr(SPRN_IVOR11);
 626         ivor[12] = mfspr(SPRN_IVOR12);
 627         ivor[13] = mfspr(SPRN_IVOR13);
 628         ivor[14] = mfspr(SPRN_IVOR14);
 629         ivor[15] = mfspr(SPRN_IVOR15);
 630
 631         for (i = 0; i < 16; i++) {
 632                 if (ivor[i] > max_ivor)
 633                         max_ivor = ivor[i];
 634
 635                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
 636                        kvmppc_handlers_start + i * kvmppc_handler_len,
 637                        kvmppc_handler_len);
 638         }
 639         flush_icache_range(kvmppc_booke_handlers,
 640                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 641
 642         return 0;
 643 }
 644
 645 void __exit kvmppc_booke_exit(void)
 646 {
 647         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
 648         kvm_exit();
 649 }