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  * Copyright 2010-2011 Freescale Semiconductor, Inc.
  17  *
  18  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  19  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
  20  *          Scott Wood <scottwood@freescale.com>
  21  *          Varun Sethi <varun.sethi@freescale.com>
  22  */
  23
  24 #include <linux/errno.h>
  25 #include <linux/err.h>
  26 #include <linux/kvm_host.h>
  27 #include <linux/gfp.h>
  28 #include <linux/module.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/fs.h>
  31
  32 #include <asm/cputable.h>
  33 #include <asm/uaccess.h>
  34 #include <asm/kvm_ppc.h>
  35 #include <asm/cacheflush.h>
  36 #include <asm/dbell.h>
  37 #include <asm/hw_irq.h>
  38 #include <asm/irq.h>
  39
  40 #include "timing.h"
  41 #include "booke.h"
  42
  43 unsigned long kvmppc_booke_handlers;
  44
  45 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
  46 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  47
  48 struct kvm_stats_debugfs_item debugfs_entries[] = {
  49         { "mmio",       VCPU_STAT(mmio_exits) },
  50         { "dcr",        VCPU_STAT(dcr_exits) },
  51         { "sig",        VCPU_STAT(signal_exits) },
  52         { "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
  53         { "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
  54         { "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
  55         { "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
  56         { "sysc",       VCPU_STAT(syscall_exits) },
  57         { "isi",        VCPU_STAT(isi_exits) },
  58         { "dsi",        VCPU_STAT(dsi_exits) },
  59         { "inst_emu",   VCPU_STAT(emulated_inst_exits) },
  60         { "dec",        VCPU_STAT(dec_exits) },
  61         { "ext_intr",   VCPU_STAT(ext_intr_exits) },
  62         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  63         { "doorbell", VCPU_STAT(dbell_exits) },
  64         { "guest doorbell", VCPU_STAT(gdbell_exits) },
  65         { NULL }
  66 };
  67
  68 /* TODO: use vcpu_printf() */
  69 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
  70 {
  71         int i;
  72
  73         printk("pc:   %08lx msr:  %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
  74         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
  75         printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
  76                                             vcpu->arch.shared->srr1);
  77
  78         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  79
  80         for (i = 0; i < 32; i += 4) {
  81                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  82                        kvmppc_get_gpr(vcpu, i),
  83                        kvmppc_get_gpr(vcpu, i+1),
  84                        kvmppc_get_gpr(vcpu, i+2),
  85                        kvmppc_get_gpr(vcpu, i+3));
  86         }
  87 }
  88
  89 #ifdef CONFIG_SPE
  90 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
  91 {
  92         preempt_disable();
  93         enable_kernel_spe();
  94         kvmppc_save_guest_spe(vcpu);
  95         vcpu->arch.shadow_msr &= ~MSR_SPE;
  96         preempt_enable();
  97 }
  98
  99 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
 100 {
 101         preempt_disable();
 102         enable_kernel_spe();
 103         kvmppc_load_guest_spe(vcpu);
 104         vcpu->arch.shadow_msr |= MSR_SPE;
 105         preempt_enable();
 106 }
 107
 108 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 109 {
 110         if (vcpu->arch.shared->msr & MSR_SPE) {
 111                 if (!(vcpu->arch.shadow_msr & MSR_SPE))
 112                         kvmppc_vcpu_enable_spe(vcpu);
 113         } else if (vcpu->arch.shadow_msr & MSR_SPE) {
 114                 kvmppc_vcpu_disable_spe(vcpu);
 115         }
 116 }
 117 #else
 118 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 119 {
 120 }
 121 #endif
 122
 123 /*
 124  * Helper function for "full" MSR writes.  No need to call this if only
 125  * EE/CE/ME/DE/RI are changing.
 126  */
 127 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
 128 {
 129         u32 old_msr = vcpu->arch.shared->msr;
 130
 131 #ifdef CONFIG_KVM_BOOKE_HV
 132         new_msr |= MSR_GS;
 133 #endif
 134
 135         vcpu->arch.shared->msr = new_msr;
 136
 137         kvmppc_mmu_msr_notify(vcpu, old_msr);
 138         kvmppc_vcpu_sync_spe(vcpu);
 139 }
 140
 141 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
 142                                        unsigned int priority)
 143 {
 144         set_bit(priority, &vcpu->arch.pending_exceptions);
 145 }
 146
 147 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
 148                                         ulong dear_flags, ulong esr_flags)
 149 {
 150         vcpu->arch.queued_dear = dear_flags;
 151         vcpu->arch.queued_esr = esr_flags;
 152         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
 153 }
 154
 155 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
 156                                            ulong dear_flags, ulong esr_flags)
 157 {
 158         vcpu->arch.queued_dear = dear_flags;
 159         vcpu->arch.queued_esr = esr_flags;
 160         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 161 }
 162
 163 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
 164                                            ulong esr_flags)
 165 {
 166         vcpu->arch.queued_esr = esr_flags;
 167         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 168 }
 169
 170 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
 171 {
 172         vcpu->arch.queued_esr = esr_flags;
 173         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 174 }
 175
 176 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 177 {
 178         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
 179 }
 180
 181 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 182 {
 183         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 184 }
 185
 186 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 187 {
 188         clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 189 }
 190
 191 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 192                                 struct kvm_interrupt *irq)
 193 {
 194         unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
 195
 196         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 197                 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
 198
 199         kvmppc_booke_queue_irqprio(vcpu, prio);
 200 }
 201
 202 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
 203                                   struct kvm_interrupt *irq)
 204 {
 205         clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
 206         clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
 207 }
 208
 209 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 210 {
 211 #ifdef CONFIG_KVM_BOOKE_HV
 212         mtspr(SPRN_GSRR0, srr0);
 213         mtspr(SPRN_GSRR1, srr1);
 214 #else
 215         vcpu->arch.shared->srr0 = srr0;
 216         vcpu->arch.shared->srr1 = srr1;
 217 #endif
 218 }
 219
 220 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 221 {
 222         vcpu->arch.csrr0 = srr0;
 223         vcpu->arch.csrr1 = srr1;
 224 }
 225
 226 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 227 {
 228         if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
 229                 vcpu->arch.dsrr0 = srr0;
 230                 vcpu->arch.dsrr1 = srr1;
 231         } else {
 232                 set_guest_csrr(vcpu, srr0, srr1);
 233         }
 234 }
 235
 236 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 237 {
 238         vcpu->arch.mcsrr0 = srr0;
 239         vcpu->arch.mcsrr1 = srr1;
 240 }
 241
 242 static unsigned long get_guest_dear(struct kvm_vcpu *vcpu)
 243 {
 244 #ifdef CONFIG_KVM_BOOKE_HV
 245         return mfspr(SPRN_GDEAR);
 246 #else
 247         return vcpu->arch.shared->dar;
 248 #endif
 249 }
 250
 251 static void set_guest_dear(struct kvm_vcpu *vcpu, unsigned long dear)
 252 {
 253 #ifdef CONFIG_KVM_BOOKE_HV
 254         mtspr(SPRN_GDEAR, dear);
 255 #else
 256         vcpu->arch.shared->dar = dear;
 257 #endif
 258 }
 259
 260 static unsigned long get_guest_esr(struct kvm_vcpu *vcpu)
 261 {
 262 #ifdef CONFIG_KVM_BOOKE_HV
 263         return mfspr(SPRN_GESR);
 264 #else
 265         return vcpu->arch.shared->esr;
 266 #endif
 267 }
 268
 269 static void set_guest_esr(struct kvm_vcpu *vcpu, u32 esr)
 270 {
 271 #ifdef CONFIG_KVM_BOOKE_HV
 272         mtspr(SPRN_GESR, esr);
 273 #else
 274         vcpu->arch.shared->esr = esr;
 275 #endif
 276 }
 277
 278 /* Deliver the interrupt of the corresponding priority, if possible. */
 279 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 280                                         unsigned int priority)
 281 {
 282         int allowed = 0;
 283         ulong uninitialized_var(msr_mask);
 284         bool update_esr = false, update_dear = false;
 285         ulong crit_raw = vcpu->arch.shared->critical;
 286         ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
 287         bool crit;
 288         bool keep_irq = false;
 289         enum int_class int_class;
 290
 291         /* Truncate crit indicators in 32 bit mode */
 292         if (!(vcpu->arch.shared->msr & MSR_SF)) {
 293                 crit_raw &= 0xffffffff;
 294                 crit_r1 &= 0xffffffff;
 295         }
 296
 297         /* Critical section when crit == r1 */
 298         crit = (crit_raw == crit_r1);
 299         /* ... and we're in supervisor mode */
 300         crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 301
 302         if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
 303                 priority = BOOKE_IRQPRIO_EXTERNAL;
 304                 keep_irq = true;
 305         }
 306
 307         switch (priority) {
 308         case BOOKE_IRQPRIO_DTLB_MISS:
 309         case BOOKE_IRQPRIO_DATA_STORAGE:
 310                 update_dear = true;
 311                 /* fall through */
 312         case BOOKE_IRQPRIO_INST_STORAGE:
 313         case BOOKE_IRQPRIO_PROGRAM:
 314                 update_esr = true;
 315                 /* fall through */
 316         case BOOKE_IRQPRIO_ITLB_MISS:
 317         case BOOKE_IRQPRIO_SYSCALL:
 318         case BOOKE_IRQPRIO_FP_UNAVAIL:
 319         case BOOKE_IRQPRIO_SPE_UNAVAIL:
 320         case BOOKE_IRQPRIO_SPE_FP_DATA:
 321         case BOOKE_IRQPRIO_SPE_FP_ROUND:
 322         case BOOKE_IRQPRIO_AP_UNAVAIL:
 323         case BOOKE_IRQPRIO_ALIGNMENT:
 324                 allowed = 1;
 325                 msr_mask = MSR_GS | MSR_CE | MSR_ME | MSR_DE;
 326                 int_class = INT_CLASS_NONCRIT;
 327                 break;
 328         case BOOKE_IRQPRIO_CRITICAL:
 329                 allowed = vcpu->arch.shared->msr & MSR_CE;
 330                 allowed = allowed && !crit;
 331                 msr_mask = MSR_GS | MSR_ME;
 332                 int_class = INT_CLASS_CRIT;
 333                 break;
 334         case BOOKE_IRQPRIO_MACHINE_CHECK:
 335                 allowed = vcpu->arch.shared->msr & MSR_ME;
 336                 allowed = allowed && !crit;
 337                 msr_mask = MSR_GS;
 338                 int_class = INT_CLASS_MC;
 339                 break;
 340         case BOOKE_IRQPRIO_DECREMENTER:
 341         case BOOKE_IRQPRIO_FIT:
 342                 keep_irq = true;
 343                 /* fall through */
 344         case BOOKE_IRQPRIO_EXTERNAL:
 345                 allowed = vcpu->arch.shared->msr & MSR_EE;
 346                 allowed = allowed && !crit;
 347                 msr_mask = MSR_GS | MSR_CE | MSR_ME | MSR_DE;
 348                 int_class = INT_CLASS_NONCRIT;
 349                 break;
 350         case BOOKE_IRQPRIO_DEBUG:
 351                 allowed = vcpu->arch.shared->msr & MSR_DE;
 352                 allowed = allowed && !crit;
 353                 msr_mask = MSR_GS | MSR_ME;
 354                 int_class = INT_CLASS_CRIT;
 355                 break;
 356         }
 357
 358         if (allowed) {
 359                 switch (int_class) {
 360                 case INT_CLASS_NONCRIT:
 361                         set_guest_srr(vcpu, vcpu->arch.pc,
 362                                       vcpu->arch.shared->msr);
 363                         break;
 364                 case INT_CLASS_CRIT:
 365                         set_guest_csrr(vcpu, vcpu->arch.pc,
 366                                        vcpu->arch.shared->msr);
 367                         break;
 368                 case INT_CLASS_DBG:
 369                         set_guest_dsrr(vcpu, vcpu->arch.pc,
 370                                        vcpu->arch.shared->msr);
 371                         break;
 372                 case INT_CLASS_MC:
 373                         set_guest_mcsrr(vcpu, vcpu->arch.pc,
 374                                         vcpu->arch.shared->msr);
 375                         break;
 376                 }
 377
 378                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 379                 if (update_esr == true)
 380                         set_guest_esr(vcpu, vcpu->arch.queued_esr);
 381                 if (update_dear == true)
 382                         set_guest_dear(vcpu, vcpu->arch.queued_dear);
 383                 kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
 384
 385                 if (!keep_irq)
 386                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 387         }
 388
 389 #ifdef CONFIG_KVM_BOOKE_HV
 390         /*
 391          * If an interrupt is pending but masked, raise a guest doorbell
 392          * so that we are notified when the guest enables the relevant
 393          * MSR bit.
 394          */
 395         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
 396                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
 397         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
 398                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
 399         if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
 400                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
 401 #endif
 402
 403         return allowed;
 404 }
 405
 406 static void update_timer_ints(struct kvm_vcpu *vcpu)
 407 {
 408         if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
 409                 kvmppc_core_queue_dec(vcpu);
 410         else
 411                 kvmppc_core_dequeue_dec(vcpu);
 412 }
 413
 414 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
 415 {
 416         unsigned long *pending = &vcpu->arch.pending_exceptions;
 417         unsigned int priority;
 418
 419         if (vcpu->requests) {
 420                 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) {
 421                         smp_mb();
 422                         update_timer_ints(vcpu);
 423                 }
 424         }
 425
 426         priority = __ffs(*pending);
 427         while (priority <= BOOKE_IRQPRIO_MAX) {
 428                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 429                         break;
 430
 431                 priority = find_next_bit(pending,
 432                                          BITS_PER_BYTE * sizeof(*pending),
 433                                          priority + 1);
 434         }
 435
 436         /* Tell the guest about our interrupt status */
 437         vcpu->arch.shared->int_pending = !!*pending;
 438 }
 439
 440 /* Check pending exceptions and deliver one, if possible. */
 441 void kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 442 {
 443         WARN_ON_ONCE(!irqs_disabled());
 444
 445         kvmppc_core_check_exceptions(vcpu);
 446
 447         if (vcpu->arch.shared->msr & MSR_WE) {
 448                 local_irq_enable();
 449                 kvm_vcpu_block(vcpu);
 450                 local_irq_disable();
 451
 452                 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
 453                 kvmppc_core_check_exceptions(vcpu);
 454         };
 455 }
 456
 457 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 458 {
 459         int ret;
 460
 461         if (!vcpu->arch.sane) {
 462                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 463                 return -EINVAL;
 464         }
 465
 466         if (!current->thread.kvm_vcpu) {
 467                 WARN(1, "no vcpu\n");
 468                 return -EPERM;
 469         }
 470
 471         local_irq_disable();
 472
 473         kvmppc_core_prepare_to_enter(vcpu);
 474
 475         if (signal_pending(current)) {
 476                 kvm_run->exit_reason = KVM_EXIT_INTR;
 477                 ret = -EINTR;
 478                 goto out;
 479         }
 480
 481         kvm_guest_enter();
 482         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
 483         kvm_guest_exit();
 484
 485 out:
 486         local_irq_enable();
 487         return ret;
 488 }
 489
 490 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
 491 {
 492         enum emulation_result er;
 493
 494         er = kvmppc_emulate_instruction(run, vcpu);
 495         switch (er) {
 496         case EMULATE_DONE:
 497                 /* don't overwrite subtypes, just account kvm_stats */
 498                 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 499                 /* Future optimization: only reload non-volatiles if
 500                  * they were actually modified by emulation. */
 501                 return RESUME_GUEST_NV;
 502
 503         case EMULATE_DO_DCR:
 504                 run->exit_reason = KVM_EXIT_DCR;
 505                 return RESUME_HOST;
 506
 507         case EMULATE_FAIL:
 508                 /* XXX Deliver Program interrupt to guest. */
 509                 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 510                        __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 511                 /* For debugging, encode the failing instruction and
 512                  * report it to userspace. */
 513                 run->hw.hardware_exit_reason = ~0ULL << 32;
 514                 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 515                 return RESUME_HOST;
 516
 517         default:
 518                 BUG();
 519         }
 520 }
 521
 522 /**
 523  * kvmppc_handle_exit
 524  *
 525  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 526  */
 527 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 528                        unsigned int exit_nr)
 529 {
 530         int r = RESUME_HOST;
 531
 532         /* update before a new last_exit_type is rewritten */
 533         kvmppc_update_timing_stats(vcpu);
 534
 535         switch (exit_nr) {
 536         case BOOKE_INTERRUPT_EXTERNAL:
 537                 do_IRQ(current->thread.regs);
 538                 break;
 539
 540         case BOOKE_INTERRUPT_DECREMENTER:
 541                 timer_interrupt(current->thread.regs);
 542                 break;
 543
 544 #if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64)
 545         case BOOKE_INTERRUPT_DOORBELL:
 546                 doorbell_exception(current->thread.regs);
 547                 break;
 548 #endif
 549         case BOOKE_INTERRUPT_MACHINE_CHECK:
 550                 /* FIXME */
 551                 break;
 552         }
 553
 554         local_irq_enable();
 555
 556         run->exit_reason = KVM_EXIT_UNKNOWN;
 557         run->ready_for_interrupt_injection = 1;
 558
 559         switch (exit_nr) {
 560         case BOOKE_INTERRUPT_MACHINE_CHECK:
 561                 kvm_resched(vcpu);
 562                 r = RESUME_GUEST;
 563                 break;
 564
 565         case BOOKE_INTERRUPT_EXTERNAL:
 566                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 567                 kvm_resched(vcpu);
 568                 r = RESUME_GUEST;
 569                 break;
 570
 571         case BOOKE_INTERRUPT_DECREMENTER:
 572                 kvmppc_account_exit(vcpu, DEC_EXITS);
 573                 kvm_resched(vcpu);
 574                 r = RESUME_GUEST;
 575                 break;
 576
 577         case BOOKE_INTERRUPT_DOORBELL:
 578                 kvmppc_account_exit(vcpu, DBELL_EXITS);
 579                 kvm_resched(vcpu);
 580                 r = RESUME_GUEST;
 581                 break;
 582
 583         case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
 584                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 585
 586                 /*
 587                  * We are here because there is a pending guest interrupt
 588                  * which could not be delivered as MSR_CE or MSR_ME was not
 589                  * set.  Once we break from here we will retry delivery.
 590                  */
 591                 r = RESUME_GUEST;
 592                 break;
 593
 594         case BOOKE_INTERRUPT_GUEST_DBELL:
 595                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 596
 597                 /*
 598                  * We are here because there is a pending guest interrupt
 599                  * which could not be delivered as MSR_EE was not set.  Once
 600                  * we break from here we will retry delivery.
 601                  */
 602                 r = RESUME_GUEST;
 603                 break;
 604
 605         case BOOKE_INTERRUPT_HV_PRIV:
 606                 r = emulation_exit(run, vcpu);
 607                 break;
 608
 609         case BOOKE_INTERRUPT_PROGRAM:
 610                 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
 611                         /* Program traps generated by user-level software must be handled
 612                          * by the guest kernel. */
 613                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
 614                         r = RESUME_GUEST;
 615                         kvmppc_account_exit(vcpu, USR_PR_INST);
 616                         break;
 617                 }
 618
 619                 r = emulation_exit(run, vcpu);
 620                 break;
 621
 622         case BOOKE_INTERRUPT_FP_UNAVAIL:
 623                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 624                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 625                 r = RESUME_GUEST;
 626                 break;
 627
 628 #ifdef CONFIG_SPE
 629         case BOOKE_INTERRUPT_SPE_UNAVAIL: {
 630                 if (vcpu->arch.shared->msr & MSR_SPE)
 631                         kvmppc_vcpu_enable_spe(vcpu);
 632                 else
 633                         kvmppc_booke_queue_irqprio(vcpu,
 634                                                    BOOKE_IRQPRIO_SPE_UNAVAIL);
 635                 r = RESUME_GUEST;
 636                 break;
 637         }
 638
 639         case BOOKE_INTERRUPT_SPE_FP_DATA:
 640                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 641                 r = RESUME_GUEST;
 642                 break;
 643
 644         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 645                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 646                 r = RESUME_GUEST;
 647                 break;
 648 #else
 649         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 650                 /*
 651                  * Guest wants SPE, but host kernel doesn't support it.  Send
 652                  * an "unimplemented operation" program check to the guest.
 653                  */
 654                 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
 655                 r = RESUME_GUEST;
 656                 break;
 657
 658         /*
 659          * These really should never happen without CONFIG_SPE,
 660          * as we should never enable the real MSR[SPE] in the guest.
 661          */
 662         case BOOKE_INTERRUPT_SPE_FP_DATA:
 663         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 664                 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
 665                        __func__, exit_nr, vcpu->arch.pc);
 666                 run->hw.hardware_exit_reason = exit_nr;
 667                 r = RESUME_HOST;
 668                 break;
 669 #endif
 670
 671         case BOOKE_INTERRUPT_DATA_STORAGE:
 672                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
 673                                                vcpu->arch.fault_esr);
 674                 kvmppc_account_exit(vcpu, DSI_EXITS);
 675                 r = RESUME_GUEST;
 676                 break;
 677
 678         case BOOKE_INTERRUPT_INST_STORAGE:
 679                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
 680                 kvmppc_account_exit(vcpu, ISI_EXITS);
 681                 r = RESUME_GUEST;
 682                 break;
 683
 684 #ifdef CONFIG_KVM_BOOKE_HV
 685         case BOOKE_INTERRUPT_HV_SYSCALL:
 686                 if (!(vcpu->arch.shared->msr & MSR_PR)) {
 687                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 688                 } else {
 689                         /*
 690                          * hcall from guest userspace -- send privileged
 691                          * instruction program check.
 692                          */
 693                         kvmppc_core_queue_program(vcpu, ESR_PPR);
 694                 }
 695
 696                 r = RESUME_GUEST;
 697                 break;
 698 #else
 699         case BOOKE_INTERRUPT_SYSCALL:
 700                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
 701                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
 702                         /* KVM PV hypercalls */
 703                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 704                         r = RESUME_GUEST;
 705                 } else {
 706                         /* Guest syscalls */
 707                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 708                 }
 709                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 710                 r = RESUME_GUEST;
 711                 break;
 712 #endif
 713
 714         case BOOKE_INTERRUPT_DTLB_MISS: {
 715                 unsigned long eaddr = vcpu->arch.fault_dear;
 716                 int gtlb_index;
 717                 gpa_t gpaddr;
 718                 gfn_t gfn;
 719
 720 #ifdef CONFIG_KVM_E500
 721                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
 722                     (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
 723                         kvmppc_map_magic(vcpu);
 724                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 725                         r = RESUME_GUEST;
 726
 727                         break;
 728                 }
 729 #endif
 730
 731                 /* Check the guest TLB. */
 732                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
 733                 if (gtlb_index < 0) {
 734                         /* The guest didn't have a mapping for it. */
 735                         kvmppc_core_queue_dtlb_miss(vcpu,
 736                                                     vcpu->arch.fault_dear,
 737                                                     vcpu->arch.fault_esr);
 738                         kvmppc_mmu_dtlb_miss(vcpu);
 739                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 740                         r = RESUME_GUEST;
 741                         break;
 742                 }
 743
 744                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 745                 gfn = gpaddr >> PAGE_SHIFT;
 746
 747                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 748                         /* The guest TLB had a mapping, but the shadow TLB
 749                          * didn't, and it is RAM. This could be because:
 750                          * a) the entry is mapping the host kernel, or
 751                          * b) the guest used a large mapping which we're faking
 752                          * Either way, we need to satisfy the fault without
 753                          * invoking the guest. */
 754                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 755                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 756                         r = RESUME_GUEST;
 757                 } else {
 758                         /* Guest has mapped and accessed a page which is not
 759                          * actually RAM. */
 760                         vcpu->arch.paddr_accessed = gpaddr;
 761                         r = kvmppc_emulate_mmio(run, vcpu);
 762                         kvmppc_account_exit(vcpu, MMIO_EXITS);
 763                 }
 764
 765                 break;
 766         }
 767
 768         case BOOKE_INTERRUPT_ITLB_MISS: {
 769                 unsigned long eaddr = vcpu->arch.pc;
 770                 gpa_t gpaddr;
 771                 gfn_t gfn;
 772                 int gtlb_index;
 773
 774                 r = RESUME_GUEST;
 775
 776                 /* Check the guest TLB. */
 777                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
 778                 if (gtlb_index < 0) {
 779                         /* The guest didn't have a mapping for it. */
 780                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 781                         kvmppc_mmu_itlb_miss(vcpu);
 782                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 783                         break;
 784                 }
 785
 786                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 787
 788                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 789                 gfn = gpaddr >> PAGE_SHIFT;
 790
 791                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 792                         /* The guest TLB had a mapping, but the shadow TLB
 793                          * didn't. This could be because:
 794                          * a) the entry is mapping the host kernel, or
 795                          * b) the guest used a large mapping which we're faking
 796                          * Either way, we need to satisfy the fault without
 797                          * invoking the guest. */
 798                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 799                 } else {
 800                         /* Guest mapped and leaped at non-RAM! */
 801                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 802                 }
 803
 804                 break;
 805         }
 806
 807         case BOOKE_INTERRUPT_DEBUG: {
 808                 u32 dbsr;
 809
 810                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 811
 812                 /* clear IAC events in DBSR register */
 813                 dbsr = mfspr(SPRN_DBSR);
 814                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 815                 mtspr(SPRN_DBSR, dbsr);
 816
 817                 run->exit_reason = KVM_EXIT_DEBUG;
 818                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
 819                 r = RESUME_HOST;
 820                 break;
 821         }
 822
 823         default:
 824                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 825                 BUG();
 826         }
 827
 828         local_irq_disable();
 829
 830         kvmppc_core_prepare_to_enter(vcpu);
 831
 832         if (!(r & RESUME_HOST)) {
 833                 /* To avoid clobbering exit_reason, only check for signals if
 834                  * we aren't already exiting to userspace for some other
 835                  * reason. */
 836                 if (signal_pending(current)) {
 837                         run->exit_reason = KVM_EXIT_INTR;
 838                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 839                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 840                 }
 841         }
 842
 843         return r;
 844 }
 845
 846 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 847 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 848 {
 849         int i;
 850         int r;
 851
 852         vcpu->arch.pc = 0;
 853         vcpu->arch.shared->pir = vcpu->vcpu_id;
 854         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
 855         kvmppc_set_msr(vcpu, 0);
 856
 857 #ifndef CONFIG_KVM_BOOKE_HV
 858         vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
 859         vcpu->arch.shadow_pid = 1;
 860         vcpu->arch.shared->msr = 0;
 861 #endif
 862
 863         /* Eye-catching numbers so we know if the guest takes an interrupt
 864          * before it's programmed its own IVPR/IVORs. */
 865         vcpu->arch.ivpr = 0x55550000;
 866         for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
 867                 vcpu->arch.ivor[i] = 0x7700 | i * 4;
 868
 869         kvmppc_init_timing_stats(vcpu);
 870
 871         r = kvmppc_core_vcpu_setup(vcpu);
 872         kvmppc_sanity_check(vcpu);
 873         return r;
 874 }
 875
 876 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 877 {
 878         int i;
 879
 880         regs->pc = vcpu->arch.pc;
 881         regs->cr = kvmppc_get_cr(vcpu);
 882         regs->ctr = vcpu->arch.ctr;
 883         regs->lr = vcpu->arch.lr;
 884         regs->xer = kvmppc_get_xer(vcpu);
 885         regs->msr = vcpu->arch.shared->msr;
 886         regs->srr0 = vcpu->arch.shared->srr0;
 887         regs->srr1 = vcpu->arch.shared->srr1;
 888         regs->pid = vcpu->arch.pid;
 889         regs->sprg0 = vcpu->arch.shared->sprg0;
 890         regs->sprg1 = vcpu->arch.shared->sprg1;
 891         regs->sprg2 = vcpu->arch.shared->sprg2;
 892         regs->sprg3 = vcpu->arch.shared->sprg3;
 893         regs->sprg4 = vcpu->arch.shared->sprg4;
 894         regs->sprg5 = vcpu->arch.shared->sprg5;
 895         regs->sprg6 = vcpu->arch.shared->sprg6;
 896         regs->sprg7 = vcpu->arch.shared->sprg7;
 897
 898         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 899                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 900
 901         return 0;
 902 }
 903
 904 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 905 {
 906         int i;
 907
 908         vcpu->arch.pc = regs->pc;
 909         kvmppc_set_cr(vcpu, regs->cr);
 910         vcpu->arch.ctr = regs->ctr;
 911         vcpu->arch.lr = regs->lr;
 912         kvmppc_set_xer(vcpu, regs->xer);
 913         kvmppc_set_msr(vcpu, regs->msr);
 914         vcpu->arch.shared->srr0 = regs->srr0;
 915         vcpu->arch.shared->srr1 = regs->srr1;
 916         kvmppc_set_pid(vcpu, regs->pid);
 917         vcpu->arch.shared->sprg0 = regs->sprg0;
 918         vcpu->arch.shared->sprg1 = regs->sprg1;
 919         vcpu->arch.shared->sprg2 = regs->sprg2;
 920         vcpu->arch.shared->sprg3 = regs->sprg3;
 921         vcpu->arch.shared->sprg4 = regs->sprg4;
 922         vcpu->arch.shared->sprg5 = regs->sprg5;
 923         vcpu->arch.shared->sprg6 = regs->sprg6;
 924         vcpu->arch.shared->sprg7 = regs->sprg7;
 925
 926         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 927                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 928
 929         return 0;
 930 }
 931
 932 static void get_sregs_base(struct kvm_vcpu *vcpu,
 933                            struct kvm_sregs *sregs)
 934 {
 935         u64 tb = get_tb();
 936
 937         sregs->u.e.features |= KVM_SREGS_E_BASE;
 938
 939         sregs->u.e.csrr0 = vcpu->arch.csrr0;
 940         sregs->u.e.csrr1 = vcpu->arch.csrr1;
 941         sregs->u.e.mcsr = vcpu->arch.mcsr;
 942         sregs->u.e.esr = get_guest_esr(vcpu);
 943         sregs->u.e.dear = get_guest_dear(vcpu);
 944         sregs->u.e.tsr = vcpu->arch.tsr;
 945         sregs->u.e.tcr = vcpu->arch.tcr;
 946         sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
 947         sregs->u.e.tb = tb;
 948         sregs->u.e.vrsave = vcpu->arch.vrsave;
 949 }
 950
 951 static int set_sregs_base(struct kvm_vcpu *vcpu,
 952                           struct kvm_sregs *sregs)
 953 {
 954         if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
 955                 return 0;
 956
 957         vcpu->arch.csrr0 = sregs->u.e.csrr0;
 958         vcpu->arch.csrr1 = sregs->u.e.csrr1;
 959         vcpu->arch.mcsr = sregs->u.e.mcsr;
 960         set_guest_esr(vcpu, sregs->u.e.esr);
 961         set_guest_dear(vcpu, sregs->u.e.dear);
 962         vcpu->arch.vrsave = sregs->u.e.vrsave;
 963         kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
 964
 965         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
 966                 vcpu->arch.dec = sregs->u.e.dec;
 967                 kvmppc_emulate_dec(vcpu);
 968         }
 969
 970         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) {
 971                 vcpu->arch.tsr = sregs->u.e.tsr;
 972                 update_timer_ints(vcpu);
 973         }
 974
 975         return 0;
 976 }
 977
 978 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
 979                               struct kvm_sregs *sregs)
 980 {
 981         sregs->u.e.features |= KVM_SREGS_E_ARCH206;
 982
 983         sregs->u.e.pir = vcpu->vcpu_id;
 984         sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
 985         sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
 986         sregs->u.e.decar = vcpu->arch.decar;
 987         sregs->u.e.ivpr = vcpu->arch.ivpr;
 988 }
 989
 990 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
 991                              struct kvm_sregs *sregs)
 992 {
 993         if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
 994                 return 0;
 995
 996         if (sregs->u.e.pir != vcpu->vcpu_id)
 997                 return -EINVAL;
 998
 999         vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1000         vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1001         vcpu->arch.decar = sregs->u.e.decar;
1002         vcpu->arch.ivpr = sregs->u.e.ivpr;
1003
1004         return 0;
1005 }
1006
1007 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1008 {
1009         sregs->u.e.features |= KVM_SREGS_E_IVOR;
1010
1011         sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1012         sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1013         sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1014         sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1015         sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1016         sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1017         sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1018         sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1019         sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1020         sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1021         sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1022         sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1023         sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1024         sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1025         sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1026         sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1027 }
1028
1029 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1030 {
1031         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1032                 return 0;
1033
1034         vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1035         vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1036         vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1037         vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1038         vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1039         vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1040         vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1041         vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1042         vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1043         vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1044         vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1045         vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1046         vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1047         vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1048         vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1049         vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1050
1051         return 0;
1052 }
1053
1054 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1055                                   struct kvm_sregs *sregs)
1056 {
1057         sregs->pvr = vcpu->arch.pvr;
1058
1059         get_sregs_base(vcpu, sregs);
1060         get_sregs_arch206(vcpu, sregs);
1061         kvmppc_core_get_sregs(vcpu, sregs);
1062         return 0;
1063 }
1064
1065 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1066                                   struct kvm_sregs *sregs)
1067 {
1068         int ret;
1069
1070         if (vcpu->arch.pvr != sregs->pvr)
1071                 return -EINVAL;
1072
1073         ret = set_sregs_base(vcpu, sregs);
1074         if (ret < 0)
1075                 return ret;
1076
1077         ret = set_sregs_arch206(vcpu, sregs);
1078         if (ret < 0)
1079                 return ret;
1080
1081         return kvmppc_core_set_sregs(vcpu, sregs);
1082 }
1083
1084 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1085 {
1086         return -EINVAL;
1087 }
1088
1089 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1090 {
1091         return -EINVAL;
1092 }
1093
1094 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1095 {
1096         return -ENOTSUPP;
1097 }
1098
1099 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1100 {
1101         return -ENOTSUPP;
1102 }
1103
1104 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1105                                   struct kvm_translation *tr)
1106 {
1107         int r;
1108
1109         r = kvmppc_core_vcpu_translate(vcpu, tr);
1110         return r;
1111 }
1112
1113 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1114 {
1115         return -ENOTSUPP;
1116 }
1117
1118 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1119                                       struct kvm_userspace_memory_region *mem)
1120 {
1121         return 0;
1122 }
1123
1124 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1125                                 struct kvm_userspace_memory_region *mem)
1126 {
1127 }
1128
1129 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1130 {
1131         vcpu->arch.tcr = new_tcr;
1132         update_timer_ints(vcpu);
1133 }
1134
1135 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1136 {
1137         set_bits(tsr_bits, &vcpu->arch.tsr);
1138         smp_wmb();
1139         kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1140         kvm_vcpu_kick(vcpu);
1141 }
1142
1143 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1144 {
1145         clear_bits(tsr_bits, &vcpu->arch.tsr);
1146         update_timer_ints(vcpu);
1147 }
1148
1149 void kvmppc_decrementer_func(unsigned long data)
1150 {
1151         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
1152
1153         kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1154 }
1155
1156 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1157 {
1158         current->thread.kvm_vcpu = vcpu;
1159 }
1160
1161 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
1162 {
1163         current->thread.kvm_vcpu = NULL;
1164 }
1165
1166 int __init kvmppc_booke_init(void)
1167 {
1168 #ifndef CONFIG_KVM_BOOKE_HV
1169         unsigned long ivor[16];
1170         unsigned long max_ivor = 0;
1171         int i;
1172
1173         /* We install our own exception handlers by hijacking IVPR. IVPR must
1174          * be 16-bit aligned, so we need a 64KB allocation. */
1175         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
1176                                                  VCPU_SIZE_ORDER);
1177         if (!kvmppc_booke_handlers)
1178                 return -ENOMEM;
1179
1180         /* XXX make sure our handlers are smaller than Linux's */
1181
1182         /* Copy our interrupt handlers to match host IVORs. That way we don't
1183          * have to swap the IVORs on every guest/host transition. */
1184         ivor[0] = mfspr(SPRN_IVOR0);
1185         ivor[1] = mfspr(SPRN_IVOR1);
1186         ivor[2] = mfspr(SPRN_IVOR2);
1187         ivor[3] = mfspr(SPRN_IVOR3);
1188         ivor[4] = mfspr(SPRN_IVOR4);
1189         ivor[5] = mfspr(SPRN_IVOR5);
1190         ivor[6] = mfspr(SPRN_IVOR6);
1191         ivor[7] = mfspr(SPRN_IVOR7);
1192         ivor[8] = mfspr(SPRN_IVOR8);
1193         ivor[9] = mfspr(SPRN_IVOR9);
1194         ivor[10] = mfspr(SPRN_IVOR10);
1195         ivor[11] = mfspr(SPRN_IVOR11);
1196         ivor[12] = mfspr(SPRN_IVOR12);
1197         ivor[13] = mfspr(SPRN_IVOR13);
1198         ivor[14] = mfspr(SPRN_IVOR14);
1199         ivor[15] = mfspr(SPRN_IVOR15);
1200
1201         for (i = 0; i < 16; i++) {
1202                 if (ivor[i] > max_ivor)
1203                         max_ivor = ivor[i];
1204
1205                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
1206                        kvmppc_handlers_start + i * kvmppc_handler_len,
1207                        kvmppc_handler_len);
1208         }
1209         flush_icache_range(kvmppc_booke_handlers,
1210                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
1211 #endif /* !BOOKE_HV */
1212         return 0;
1213 }
1214
1215 void __exit kvmppc_booke_exit(void)
1216 {
1217         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
1218         kvm_exit();
1219 }