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 #include <asm/time.h>
  40
  41 #include "timing.h"
  42 #include "booke.h"
  43 #include "trace.h"
  44
  45 unsigned long kvmppc_booke_handlers;
  46
  47 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
  48 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  49
  50 struct kvm_stats_debugfs_item debugfs_entries[] = {
  51         { "mmio",       VCPU_STAT(mmio_exits) },
  52         { "dcr",        VCPU_STAT(dcr_exits) },
  53         { "sig",        VCPU_STAT(signal_exits) },
  54         { "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
  55         { "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
  56         { "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
  57         { "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
  58         { "sysc",       VCPU_STAT(syscall_exits) },
  59         { "isi",        VCPU_STAT(isi_exits) },
  60         { "dsi",        VCPU_STAT(dsi_exits) },
  61         { "inst_emu",   VCPU_STAT(emulated_inst_exits) },
  62         { "dec",        VCPU_STAT(dec_exits) },
  63         { "ext_intr",   VCPU_STAT(ext_intr_exits) },
  64         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  65         { "doorbell", VCPU_STAT(dbell_exits) },
  66         { "guest doorbell", VCPU_STAT(gdbell_exits) },
  67         { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
  68         { NULL }
  69 };
  70
  71 /* TODO: use vcpu_printf() */
  72 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
  73 {
  74         int i;
  75
  76         printk("pc:   %08lx msr:  %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
  77         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
  78         printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
  79                                             vcpu->arch.shared->srr1);
  80
  81         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  82
  83         for (i = 0; i < 32; i += 4) {
  84                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  85                        kvmppc_get_gpr(vcpu, i),
  86                        kvmppc_get_gpr(vcpu, i+1),
  87                        kvmppc_get_gpr(vcpu, i+2),
  88                        kvmppc_get_gpr(vcpu, i+3));
  89         }
  90 }
  91
  92 #ifdef CONFIG_SPE
  93 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
  94 {
  95         preempt_disable();
  96         enable_kernel_spe();
  97         kvmppc_save_guest_spe(vcpu);
  98         vcpu->arch.shadow_msr &= ~MSR_SPE;
  99         preempt_enable();
 100 }
 101
 102 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
 103 {
 104         preempt_disable();
 105         enable_kernel_spe();
 106         kvmppc_load_guest_spe(vcpu);
 107         vcpu->arch.shadow_msr |= MSR_SPE;
 108         preempt_enable();
 109 }
 110
 111 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 112 {
 113         if (vcpu->arch.shared->msr & MSR_SPE) {
 114                 if (!(vcpu->arch.shadow_msr & MSR_SPE))
 115                         kvmppc_vcpu_enable_spe(vcpu);
 116         } else if (vcpu->arch.shadow_msr & MSR_SPE) {
 117                 kvmppc_vcpu_disable_spe(vcpu);
 118         }
 119 }
 120 #else
 121 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 122 {
 123 }
 124 #endif
 125
 126 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
 127 {
 128 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV)
 129         /* We always treat the FP bit as enabled from the host
 130            perspective, so only need to adjust the shadow MSR */
 131         vcpu->arch.shadow_msr &= ~MSR_FP;
 132         vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP;
 133 #endif
 134 }
 135
 136 /*
 137  * Helper function for "full" MSR writes.  No need to call this if only
 138  * EE/CE/ME/DE/RI are changing.
 139  */
 140 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
 141 {
 142         u32 old_msr = vcpu->arch.shared->msr;
 143
 144 #ifdef CONFIG_KVM_BOOKE_HV
 145         new_msr |= MSR_GS;
 146 #endif
 147
 148         vcpu->arch.shared->msr = new_msr;
 149
 150         kvmppc_mmu_msr_notify(vcpu, old_msr);
 151         kvmppc_vcpu_sync_spe(vcpu);
 152         kvmppc_vcpu_sync_fpu(vcpu);
 153 }
 154
 155 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
 156                                        unsigned int priority)
 157 {
 158         trace_kvm_booke_queue_irqprio(vcpu, priority);
 159         set_bit(priority, &vcpu->arch.pending_exceptions);
 160 }
 161
 162 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
 163                                         ulong dear_flags, ulong esr_flags)
 164 {
 165         vcpu->arch.queued_dear = dear_flags;
 166         vcpu->arch.queued_esr = esr_flags;
 167         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
 168 }
 169
 170 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
 171                                            ulong dear_flags, ulong esr_flags)
 172 {
 173         vcpu->arch.queued_dear = dear_flags;
 174         vcpu->arch.queued_esr = esr_flags;
 175         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 176 }
 177
 178 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
 179                                            ulong esr_flags)
 180 {
 181         vcpu->arch.queued_esr = esr_flags;
 182         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 183 }
 184
 185 static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags,
 186                                         ulong esr_flags)
 187 {
 188         vcpu->arch.queued_dear = dear_flags;
 189         vcpu->arch.queued_esr = esr_flags;
 190         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT);
 191 }
 192
 193 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
 194 {
 195         vcpu->arch.queued_esr = esr_flags;
 196         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 197 }
 198
 199 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 200 {
 201         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
 202 }
 203
 204 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 205 {
 206         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 207 }
 208
 209 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 210 {
 211         clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 212 }
 213
 214 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 215                                 struct kvm_interrupt *irq)
 216 {
 217         unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
 218
 219         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 220                 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
 221
 222         kvmppc_booke_queue_irqprio(vcpu, prio);
 223 }
 224
 225 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
 226                                   struct kvm_interrupt *irq)
 227 {
 228         clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
 229         clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
 230 }
 231
 232 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu)
 233 {
 234         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG);
 235 }
 236
 237 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu)
 238 {
 239         clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions);
 240 }
 241
 242 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 243 {
 244 #ifdef CONFIG_KVM_BOOKE_HV
 245         mtspr(SPRN_GSRR0, srr0);
 246         mtspr(SPRN_GSRR1, srr1);
 247 #else
 248         vcpu->arch.shared->srr0 = srr0;
 249         vcpu->arch.shared->srr1 = srr1;
 250 #endif
 251 }
 252
 253 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 254 {
 255         vcpu->arch.csrr0 = srr0;
 256         vcpu->arch.csrr1 = srr1;
 257 }
 258
 259 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 260 {
 261         if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
 262                 vcpu->arch.dsrr0 = srr0;
 263                 vcpu->arch.dsrr1 = srr1;
 264         } else {
 265                 set_guest_csrr(vcpu, srr0, srr1);
 266         }
 267 }
 268
 269 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 270 {
 271         vcpu->arch.mcsrr0 = srr0;
 272         vcpu->arch.mcsrr1 = srr1;
 273 }
 274
 275 static unsigned long get_guest_dear(struct kvm_vcpu *vcpu)
 276 {
 277 #ifdef CONFIG_KVM_BOOKE_HV
 278         return mfspr(SPRN_GDEAR);
 279 #else
 280         return vcpu->arch.shared->dar;
 281 #endif
 282 }
 283
 284 static void set_guest_dear(struct kvm_vcpu *vcpu, unsigned long dear)
 285 {
 286 #ifdef CONFIG_KVM_BOOKE_HV
 287         mtspr(SPRN_GDEAR, dear);
 288 #else
 289         vcpu->arch.shared->dar = dear;
 290 #endif
 291 }
 292
 293 static unsigned long get_guest_esr(struct kvm_vcpu *vcpu)
 294 {
 295 #ifdef CONFIG_KVM_BOOKE_HV
 296         return mfspr(SPRN_GESR);
 297 #else
 298         return vcpu->arch.shared->esr;
 299 #endif
 300 }
 301
 302 static void set_guest_esr(struct kvm_vcpu *vcpu, u32 esr)
 303 {
 304 #ifdef CONFIG_KVM_BOOKE_HV
 305         mtspr(SPRN_GESR, esr);
 306 #else
 307         vcpu->arch.shared->esr = esr;
 308 #endif
 309 }
 310
 311 static unsigned long get_guest_epr(struct kvm_vcpu *vcpu)
 312 {
 313 #ifdef CONFIG_KVM_BOOKE_HV
 314         return mfspr(SPRN_GEPR);
 315 #else
 316         return vcpu->arch.epr;
 317 #endif
 318 }
 319
 320 /* Deliver the interrupt of the corresponding priority, if possible. */
 321 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 322                                         unsigned int priority)
 323 {
 324         int allowed = 0;
 325         ulong msr_mask = 0;
 326         bool update_esr = false, update_dear = false, update_epr = false;
 327         ulong crit_raw = vcpu->arch.shared->critical;
 328         ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
 329         bool crit;
 330         bool keep_irq = false;
 331         enum int_class int_class;
 332         ulong new_msr = vcpu->arch.shared->msr;
 333
 334         /* Truncate crit indicators in 32 bit mode */
 335         if (!(vcpu->arch.shared->msr & MSR_SF)) {
 336                 crit_raw &= 0xffffffff;
 337                 crit_r1 &= 0xffffffff;
 338         }
 339
 340         /* Critical section when crit == r1 */
 341         crit = (crit_raw == crit_r1);
 342         /* ... and we're in supervisor mode */
 343         crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 344
 345         if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
 346                 priority = BOOKE_IRQPRIO_EXTERNAL;
 347                 keep_irq = true;
 348         }
 349
 350         if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_enabled)
 351                 update_epr = true;
 352
 353         switch (priority) {
 354         case BOOKE_IRQPRIO_DTLB_MISS:
 355         case BOOKE_IRQPRIO_DATA_STORAGE:
 356         case BOOKE_IRQPRIO_ALIGNMENT:
 357                 update_dear = true;
 358                 /* fall through */
 359         case BOOKE_IRQPRIO_INST_STORAGE:
 360         case BOOKE_IRQPRIO_PROGRAM:
 361                 update_esr = true;
 362                 /* fall through */
 363         case BOOKE_IRQPRIO_ITLB_MISS:
 364         case BOOKE_IRQPRIO_SYSCALL:
 365         case BOOKE_IRQPRIO_FP_UNAVAIL:
 366         case BOOKE_IRQPRIO_SPE_UNAVAIL:
 367         case BOOKE_IRQPRIO_SPE_FP_DATA:
 368         case BOOKE_IRQPRIO_SPE_FP_ROUND:
 369         case BOOKE_IRQPRIO_AP_UNAVAIL:
 370                 allowed = 1;
 371                 msr_mask = MSR_CE | MSR_ME | MSR_DE;
 372                 int_class = INT_CLASS_NONCRIT;
 373                 break;
 374         case BOOKE_IRQPRIO_WATCHDOG:
 375         case BOOKE_IRQPRIO_CRITICAL:
 376         case BOOKE_IRQPRIO_DBELL_CRIT:
 377                 allowed = vcpu->arch.shared->msr & MSR_CE;
 378                 allowed = allowed && !crit;
 379                 msr_mask = MSR_ME;
 380                 int_class = INT_CLASS_CRIT;
 381                 break;
 382         case BOOKE_IRQPRIO_MACHINE_CHECK:
 383                 allowed = vcpu->arch.shared->msr & MSR_ME;
 384                 allowed = allowed && !crit;
 385                 int_class = INT_CLASS_MC;
 386                 break;
 387         case BOOKE_IRQPRIO_DECREMENTER:
 388         case BOOKE_IRQPRIO_FIT:
 389                 keep_irq = true;
 390                 /* fall through */
 391         case BOOKE_IRQPRIO_EXTERNAL:
 392         case BOOKE_IRQPRIO_DBELL:
 393                 allowed = vcpu->arch.shared->msr & MSR_EE;
 394                 allowed = allowed && !crit;
 395                 msr_mask = MSR_CE | MSR_ME | MSR_DE;
 396                 int_class = INT_CLASS_NONCRIT;
 397                 break;
 398         case BOOKE_IRQPRIO_DEBUG:
 399                 allowed = vcpu->arch.shared->msr & MSR_DE;
 400                 allowed = allowed && !crit;
 401                 msr_mask = MSR_ME;
 402                 int_class = INT_CLASS_CRIT;
 403                 break;
 404         }
 405
 406         if (allowed) {
 407                 switch (int_class) {
 408                 case INT_CLASS_NONCRIT:
 409                         set_guest_srr(vcpu, vcpu->arch.pc,
 410                                       vcpu->arch.shared->msr);
 411                         break;
 412                 case INT_CLASS_CRIT:
 413                         set_guest_csrr(vcpu, vcpu->arch.pc,
 414                                        vcpu->arch.shared->msr);
 415                         break;
 416                 case INT_CLASS_DBG:
 417                         set_guest_dsrr(vcpu, vcpu->arch.pc,
 418                                        vcpu->arch.shared->msr);
 419                         break;
 420                 case INT_CLASS_MC:
 421                         set_guest_mcsrr(vcpu, vcpu->arch.pc,
 422                                         vcpu->arch.shared->msr);
 423                         break;
 424                 }
 425
 426                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 427                 if (update_esr == true)
 428                         set_guest_esr(vcpu, vcpu->arch.queued_esr);
 429                 if (update_dear == true)
 430                         set_guest_dear(vcpu, vcpu->arch.queued_dear);
 431                 if (update_epr == true)
 432                         kvm_make_request(KVM_REQ_EPR_EXIT, vcpu);
 433
 434                 new_msr &= msr_mask;
 435 #if defined(CONFIG_64BIT)
 436                 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
 437                         new_msr |= MSR_CM;
 438 #endif
 439                 kvmppc_set_msr(vcpu, new_msr);
 440
 441                 if (!keep_irq)
 442                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 443         }
 444
 445 #ifdef CONFIG_KVM_BOOKE_HV
 446         /*
 447          * If an interrupt is pending but masked, raise a guest doorbell
 448          * so that we are notified when the guest enables the relevant
 449          * MSR bit.
 450          */
 451         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
 452                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
 453         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
 454                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
 455         if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
 456                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
 457 #endif
 458
 459         return allowed;
 460 }
 461
 462 /*
 463  * Return the number of jiffies until the next timeout.  If the timeout is
 464  * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA
 465  * because the larger value can break the timer APIs.
 466  */
 467 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu)
 468 {
 469         u64 tb, wdt_tb, wdt_ticks = 0;
 470         u64 nr_jiffies = 0;
 471         u32 period = TCR_GET_WP(vcpu->arch.tcr);
 472
 473         wdt_tb = 1ULL << (63 - period);
 474         tb = get_tb();
 475         /*
 476          * The watchdog timeout will hapeen when TB bit corresponding
 477          * to watchdog will toggle from 0 to 1.
 478          */
 479         if (tb & wdt_tb)
 480                 wdt_ticks = wdt_tb;
 481
 482         wdt_ticks += wdt_tb - (tb & (wdt_tb - 1));
 483
 484         /* Convert timebase ticks to jiffies */
 485         nr_jiffies = wdt_ticks;
 486
 487         if (do_div(nr_jiffies, tb_ticks_per_jiffy))
 488                 nr_jiffies++;
 489
 490         return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA);
 491 }
 492
 493 static void arm_next_watchdog(struct kvm_vcpu *vcpu)
 494 {
 495         unsigned long nr_jiffies;
 496         unsigned long flags;
 497
 498         /*
 499          * If TSR_ENW and TSR_WIS are not set then no need to exit to
 500          * userspace, so clear the KVM_REQ_WATCHDOG request.
 501          */
 502         if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS))
 503                 clear_bit(KVM_REQ_WATCHDOG, &vcpu->requests);
 504
 505         spin_lock_irqsave(&vcpu->arch.wdt_lock, flags);
 506         nr_jiffies = watchdog_next_timeout(vcpu);
 507         /*
 508          * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA
 509          * then do not run the watchdog timer as this can break timer APIs.
 510          */
 511         if (nr_jiffies < NEXT_TIMER_MAX_DELTA)
 512                 mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies);
 513         else
 514                 del_timer(&vcpu->arch.wdt_timer);
 515         spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags);
 516 }
 517
 518 void kvmppc_watchdog_func(unsigned long data)
 519 {
 520         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
 521         u32 tsr, new_tsr;
 522         int final;
 523
 524         do {
 525                 new_tsr = tsr = vcpu->arch.tsr;
 526                 final = 0;
 527
 528                 /* Time out event */
 529                 if (tsr & TSR_ENW) {
 530                         if (tsr & TSR_WIS)
 531                                 final = 1;
 532                         else
 533                                 new_tsr = tsr | TSR_WIS;
 534                 } else {
 535                         new_tsr = tsr | TSR_ENW;
 536                 }
 537         } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr);
 538
 539         if (new_tsr & TSR_WIS) {
 540                 smp_wmb();
 541                 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
 542                 kvm_vcpu_kick(vcpu);
 543         }
 544
 545         /*
 546          * If this is final watchdog expiry and some action is required
 547          * then exit to userspace.
 548          */
 549         if (final && (vcpu->arch.tcr & TCR_WRC_MASK) &&
 550             vcpu->arch.watchdog_enabled) {
 551                 smp_wmb();
 552                 kvm_make_request(KVM_REQ_WATCHDOG, vcpu);
 553                 kvm_vcpu_kick(vcpu);
 554         }
 555
 556         /*
 557          * Stop running the watchdog timer after final expiration to
 558          * prevent the host from being flooded with timers if the
 559          * guest sets a short period.
 560          * Timers will resume when TSR/TCR is updated next time.
 561          */
 562         if (!final)
 563                 arm_next_watchdog(vcpu);
 564 }
 565
 566 static void update_timer_ints(struct kvm_vcpu *vcpu)
 567 {
 568         if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
 569                 kvmppc_core_queue_dec(vcpu);
 570         else
 571                 kvmppc_core_dequeue_dec(vcpu);
 572
 573         if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS))
 574                 kvmppc_core_queue_watchdog(vcpu);
 575         else
 576                 kvmppc_core_dequeue_watchdog(vcpu);
 577 }
 578
 579 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
 580 {
 581         unsigned long *pending = &vcpu->arch.pending_exceptions;
 582         unsigned int priority;
 583
 584         priority = __ffs(*pending);
 585         while (priority < BOOKE_IRQPRIO_MAX) {
 586                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 587                         break;
 588
 589                 priority = find_next_bit(pending,
 590                                          BITS_PER_BYTE * sizeof(*pending),
 591                                          priority + 1);
 592         }
 593
 594         /* Tell the guest about our interrupt status */
 595         vcpu->arch.shared->int_pending = !!*pending;
 596 }
 597
 598 /* Check pending exceptions and deliver one, if possible. */
 599 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 600 {
 601         int r = 0;
 602         WARN_ON_ONCE(!irqs_disabled());
 603
 604         kvmppc_core_check_exceptions(vcpu);
 605
 606         if (vcpu->requests) {
 607                 /* Exception delivery raised request; start over */
 608                 return 1;
 609         }
 610
 611         if (vcpu->arch.shared->msr & MSR_WE) {
 612                 local_irq_enable();
 613                 kvm_vcpu_block(vcpu);
 614                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 615                 local_irq_disable();
 616
 617                 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
 618                 r = 1;
 619         };
 620
 621         return r;
 622 }
 623
 624 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 625 {
 626         int r = 1; /* Indicate we want to get back into the guest */
 627
 628         if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
 629                 update_timer_ints(vcpu);
 630 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 631         if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
 632                 kvmppc_core_flush_tlb(vcpu);
 633 #endif
 634
 635         if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) {
 636                 vcpu->run->exit_reason = KVM_EXIT_WATCHDOG;
 637                 r = 0;
 638         }
 639
 640         if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) {
 641                 vcpu->run->epr.epr = 0;
 642                 vcpu->arch.epr_needed = true;
 643                 vcpu->run->exit_reason = KVM_EXIT_EPR;
 644                 r = 0;
 645         }
 646
 647         return r;
 648 }
 649
 650 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 651 {
 652         int ret, s;
 653 #ifdef CONFIG_PPC_FPU
 654         unsigned int fpscr;
 655         int fpexc_mode;
 656         u64 fpr[32];
 657 #endif
 658
 659         if (!vcpu->arch.sane) {
 660                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 661                 return -EINVAL;
 662         }
 663
 664         local_irq_disable();
 665         s = kvmppc_prepare_to_enter(vcpu);
 666         if (s <= 0) {
 667                 local_irq_enable();
 668                 ret = s;
 669                 goto out;
 670         }
 671         kvmppc_lazy_ee_enable();
 672
 673         kvm_guest_enter();
 674
 675 #ifdef CONFIG_PPC_FPU
 676         /* Save userspace FPU state in stack */
 677         enable_kernel_fp();
 678         memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
 679         fpscr = current->thread.fpscr.val;
 680         fpexc_mode = current->thread.fpexc_mode;
 681
 682         /* Restore guest FPU state to thread */
 683         memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr));
 684         current->thread.fpscr.val = vcpu->arch.fpscr;
 685
 686         /*
 687          * Since we can't trap on MSR_FP in GS-mode, we consider the guest
 688          * as always using the FPU.  Kernel usage of FP (via
 689          * enable_kernel_fp()) in this thread must not occur while
 690          * vcpu->fpu_active is set.
 691          */
 692         vcpu->fpu_active = 1;
 693
 694         kvmppc_load_guest_fp(vcpu);
 695 #endif
 696
 697         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
 698
 699         /* No need for kvm_guest_exit. It's done in handle_exit.
 700            We also get here with interrupts enabled. */
 701
 702 #ifdef CONFIG_PPC_FPU
 703         kvmppc_save_guest_fp(vcpu);
 704
 705         vcpu->fpu_active = 0;
 706
 707         /* Save guest FPU state from thread */
 708         memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr));
 709         vcpu->arch.fpscr = current->thread.fpscr.val;
 710
 711         /* Restore userspace FPU state from stack */
 712         memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
 713         current->thread.fpscr.val = fpscr;
 714         current->thread.fpexc_mode = fpexc_mode;
 715 #endif
 716
 717 out:
 718         vcpu->mode = OUTSIDE_GUEST_MODE;
 719         return ret;
 720 }
 721
 722 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
 723 {
 724         enum emulation_result er;
 725
 726         er = kvmppc_emulate_instruction(run, vcpu);
 727         switch (er) {
 728         case EMULATE_DONE:
 729                 /* don't overwrite subtypes, just account kvm_stats */
 730                 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 731                 /* Future optimization: only reload non-volatiles if
 732                  * they were actually modified by emulation. */
 733                 return RESUME_GUEST_NV;
 734
 735         case EMULATE_DO_DCR:
 736                 run->exit_reason = KVM_EXIT_DCR;
 737                 return RESUME_HOST;
 738
 739         case EMULATE_FAIL:
 740                 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 741                        __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 742                 /* For debugging, encode the failing instruction and
 743                  * report it to userspace. */
 744                 run->hw.hardware_exit_reason = ~0ULL << 32;
 745                 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 746                 kvmppc_core_queue_program(vcpu, ESR_PIL);
 747                 return RESUME_HOST;
 748
 749         default:
 750                 BUG();
 751         }
 752 }
 753
 754 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
 755 {
 756         ulong r1, ip, msr, lr;
 757
 758         asm("mr %0, 1" : "=r"(r1));
 759         asm("mflr %0" : "=r"(lr));
 760         asm("mfmsr %0" : "=r"(msr));
 761         asm("bl 1f; 1: mflr %0" : "=r"(ip));
 762
 763         memset(regs, 0, sizeof(*regs));
 764         regs->gpr[1] = r1;
 765         regs->nip = ip;
 766         regs->msr = msr;
 767         regs->link = lr;
 768 }
 769
 770 /*
 771  * For interrupts needed to be handled by host interrupt handlers,
 772  * corresponding host handler are called from here in similar way
 773  * (but not exact) as they are called from low level handler
 774  * (such as from arch/powerpc/kernel/head_fsl_booke.S).
 775  */
 776 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
 777                                      unsigned int exit_nr)
 778 {
 779         struct pt_regs regs;
 780
 781         switch (exit_nr) {
 782         case BOOKE_INTERRUPT_EXTERNAL:
 783                 kvmppc_fill_pt_regs(&regs);
 784                 do_IRQ(&regs);
 785                 break;
 786         case BOOKE_INTERRUPT_DECREMENTER:
 787                 kvmppc_fill_pt_regs(&regs);
 788                 timer_interrupt(&regs);
 789                 break;
 790 #if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64)
 791         case BOOKE_INTERRUPT_DOORBELL:
 792                 kvmppc_fill_pt_regs(&regs);
 793                 doorbell_exception(&regs);
 794                 break;
 795 #endif
 796         case BOOKE_INTERRUPT_MACHINE_CHECK:
 797                 /* FIXME */
 798                 break;
 799         case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
 800                 kvmppc_fill_pt_regs(&regs);
 801                 performance_monitor_exception(&regs);
 802                 break;
 803         case BOOKE_INTERRUPT_WATCHDOG:
 804                 kvmppc_fill_pt_regs(&regs);
 805 #ifdef CONFIG_BOOKE_WDT
 806                 WatchdogException(&regs);
 807 #else
 808                 unknown_exception(&regs);
 809 #endif
 810                 break;
 811         case BOOKE_INTERRUPT_CRITICAL:
 812                 unknown_exception(&regs);
 813                 break;
 814         }
 815 }
 816
 817 /**
 818  * kvmppc_handle_exit
 819  *
 820  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 821  */
 822 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 823                        unsigned int exit_nr)
 824 {
 825         int r = RESUME_HOST;
 826         int s;
 827
 828         /* update before a new last_exit_type is rewritten */
 829         kvmppc_update_timing_stats(vcpu);
 830
 831         /* restart interrupts if they were meant for the host */
 832         kvmppc_restart_interrupt(vcpu, exit_nr);
 833
 834         local_irq_enable();
 835
 836         trace_kvm_exit(exit_nr, vcpu);
 837         kvm_guest_exit();
 838
 839         run->exit_reason = KVM_EXIT_UNKNOWN;
 840         run->ready_for_interrupt_injection = 1;
 841
 842         switch (exit_nr) {
 843         case BOOKE_INTERRUPT_MACHINE_CHECK:
 844                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 845                 kvmppc_dump_vcpu(vcpu);
 846                 /* For debugging, send invalid exit reason to user space */
 847                 run->hw.hardware_exit_reason = ~1ULL << 32;
 848                 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
 849                 r = RESUME_HOST;
 850                 break;
 851
 852         case BOOKE_INTERRUPT_EXTERNAL:
 853                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 854                 r = RESUME_GUEST;
 855                 break;
 856
 857         case BOOKE_INTERRUPT_DECREMENTER:
 858                 kvmppc_account_exit(vcpu, DEC_EXITS);
 859                 r = RESUME_GUEST;
 860                 break;
 861
 862         case BOOKE_INTERRUPT_WATCHDOG:
 863                 r = RESUME_GUEST;
 864                 break;
 865
 866         case BOOKE_INTERRUPT_DOORBELL:
 867                 kvmppc_account_exit(vcpu, DBELL_EXITS);
 868                 r = RESUME_GUEST;
 869                 break;
 870
 871         case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
 872                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 873
 874                 /*
 875                  * We are here because there is a pending guest interrupt
 876                  * which could not be delivered as MSR_CE or MSR_ME was not
 877                  * set.  Once we break from here we will retry delivery.
 878                  */
 879                 r = RESUME_GUEST;
 880                 break;
 881
 882         case BOOKE_INTERRUPT_GUEST_DBELL:
 883                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 884
 885                 /*
 886                  * We are here because there is a pending guest interrupt
 887                  * which could not be delivered as MSR_EE was not set.  Once
 888                  * we break from here we will retry delivery.
 889                  */
 890                 r = RESUME_GUEST;
 891                 break;
 892
 893         case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
 894                 r = RESUME_GUEST;
 895                 break;
 896
 897         case BOOKE_INTERRUPT_HV_PRIV:
 898                 r = emulation_exit(run, vcpu);
 899                 break;
 900
 901         case BOOKE_INTERRUPT_PROGRAM:
 902                 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
 903                         /*
 904                          * Program traps generated by user-level software must
 905                          * be handled by the guest kernel.
 906                          *
 907                          * In GS mode, hypervisor privileged instructions trap
 908                          * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
 909                          * actual program interrupts, handled by the guest.
 910                          */
 911                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
 912                         r = RESUME_GUEST;
 913                         kvmppc_account_exit(vcpu, USR_PR_INST);
 914                         break;
 915                 }
 916
 917                 r = emulation_exit(run, vcpu);
 918                 break;
 919
 920         case BOOKE_INTERRUPT_FP_UNAVAIL:
 921                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 922                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 923                 r = RESUME_GUEST;
 924                 break;
 925
 926 #ifdef CONFIG_SPE
 927         case BOOKE_INTERRUPT_SPE_UNAVAIL: {
 928                 if (vcpu->arch.shared->msr & MSR_SPE)
 929                         kvmppc_vcpu_enable_spe(vcpu);
 930                 else
 931                         kvmppc_booke_queue_irqprio(vcpu,
 932                                                    BOOKE_IRQPRIO_SPE_UNAVAIL);
 933                 r = RESUME_GUEST;
 934                 break;
 935         }
 936
 937         case BOOKE_INTERRUPT_SPE_FP_DATA:
 938                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 939                 r = RESUME_GUEST;
 940                 break;
 941
 942         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 943                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 944                 r = RESUME_GUEST;
 945                 break;
 946 #else
 947         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 948                 /*
 949                  * Guest wants SPE, but host kernel doesn't support it.  Send
 950                  * an "unimplemented operation" program check to the guest.
 951                  */
 952                 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
 953                 r = RESUME_GUEST;
 954                 break;
 955
 956         /*
 957          * These really should never happen without CONFIG_SPE,
 958          * as we should never enable the real MSR[SPE] in the guest.
 959          */
 960         case BOOKE_INTERRUPT_SPE_FP_DATA:
 961         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 962                 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
 963                        __func__, exit_nr, vcpu->arch.pc);
 964                 run->hw.hardware_exit_reason = exit_nr;
 965                 r = RESUME_HOST;
 966                 break;
 967 #endif
 968
 969         case BOOKE_INTERRUPT_DATA_STORAGE:
 970                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
 971                                                vcpu->arch.fault_esr);
 972                 kvmppc_account_exit(vcpu, DSI_EXITS);
 973                 r = RESUME_GUEST;
 974                 break;
 975
 976         case BOOKE_INTERRUPT_INST_STORAGE:
 977                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
 978                 kvmppc_account_exit(vcpu, ISI_EXITS);
 979                 r = RESUME_GUEST;
 980                 break;
 981
 982         case BOOKE_INTERRUPT_ALIGNMENT:
 983                 kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear,
 984                                             vcpu->arch.fault_esr);
 985                 r = RESUME_GUEST;
 986                 break;
 987
 988 #ifdef CONFIG_KVM_BOOKE_HV
 989         case BOOKE_INTERRUPT_HV_SYSCALL:
 990                 if (!(vcpu->arch.shared->msr & MSR_PR)) {
 991                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 992                 } else {
 993                         /*
 994                          * hcall from guest userspace -- send privileged
 995                          * instruction program check.
 996                          */
 997                         kvmppc_core_queue_program(vcpu, ESR_PPR);
 998                 }
 999
1000                 r = RESUME_GUEST;
1001                 break;
1002 #else
1003         case BOOKE_INTERRUPT_SYSCALL:
1004                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1005                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1006                         /* KVM PV hypercalls */
1007                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1008                         r = RESUME_GUEST;
1009                 } else {
1010                         /* Guest syscalls */
1011                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
1012                 }
1013                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
1014                 r = RESUME_GUEST;
1015                 break;
1016 #endif
1017
1018         case BOOKE_INTERRUPT_DTLB_MISS: {
1019                 unsigned long eaddr = vcpu->arch.fault_dear;
1020                 int gtlb_index;
1021                 gpa_t gpaddr;
1022                 gfn_t gfn;
1023
1024 #ifdef CONFIG_KVM_E500V2
1025                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1026                     (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1027                         kvmppc_map_magic(vcpu);
1028                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1029                         r = RESUME_GUEST;
1030
1031                         break;
1032                 }
1033 #endif
1034
1035                 /* Check the guest TLB. */
1036                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1037                 if (gtlb_index < 0) {
1038                         /* The guest didn't have a mapping for it. */
1039                         kvmppc_core_queue_dtlb_miss(vcpu,
1040                                                     vcpu->arch.fault_dear,
1041                                                     vcpu->arch.fault_esr);
1042                         kvmppc_mmu_dtlb_miss(vcpu);
1043                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
1044                         r = RESUME_GUEST;
1045                         break;
1046                 }
1047
1048                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1049                 gfn = gpaddr >> PAGE_SHIFT;
1050
1051                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1052                         /* The guest TLB had a mapping, but the shadow TLB
1053                          * didn't, and it is RAM. This could be because:
1054                          * a) the entry is mapping the host kernel, or
1055                          * b) the guest used a large mapping which we're faking
1056                          * Either way, we need to satisfy the fault without
1057                          * invoking the guest. */
1058                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1059                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1060                         r = RESUME_GUEST;
1061                 } else {
1062                         /* Guest has mapped and accessed a page which is not
1063                          * actually RAM. */
1064                         vcpu->arch.paddr_accessed = gpaddr;
1065                         vcpu->arch.vaddr_accessed = eaddr;
1066                         r = kvmppc_emulate_mmio(run, vcpu);
1067                         kvmppc_account_exit(vcpu, MMIO_EXITS);
1068                 }
1069
1070                 break;
1071         }
1072
1073         case BOOKE_INTERRUPT_ITLB_MISS: {
1074                 unsigned long eaddr = vcpu->arch.pc;
1075                 gpa_t gpaddr;
1076                 gfn_t gfn;
1077                 int gtlb_index;
1078
1079                 r = RESUME_GUEST;
1080
1081                 /* Check the guest TLB. */
1082                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1083                 if (gtlb_index < 0) {
1084                         /* The guest didn't have a mapping for it. */
1085                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
1086                         kvmppc_mmu_itlb_miss(vcpu);
1087                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
1088                         break;
1089                 }
1090
1091                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
1092
1093                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1094                 gfn = gpaddr >> PAGE_SHIFT;
1095
1096                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1097                         /* The guest TLB had a mapping, but the shadow TLB
1098                          * didn't. This could be because:
1099                          * a) the entry is mapping the host kernel, or
1100                          * b) the guest used a large mapping which we're faking
1101                          * Either way, we need to satisfy the fault without
1102                          * invoking the guest. */
1103                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1104                 } else {
1105                         /* Guest mapped and leaped at non-RAM! */
1106                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
1107                 }
1108
1109                 break;
1110         }
1111
1112         case BOOKE_INTERRUPT_DEBUG: {
1113                 u32 dbsr;
1114
1115                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
1116
1117                 /* clear IAC events in DBSR register */
1118                 dbsr = mfspr(SPRN_DBSR);
1119                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
1120                 mtspr(SPRN_DBSR, dbsr);
1121
1122                 run->exit_reason = KVM_EXIT_DEBUG;
1123                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
1124                 r = RESUME_HOST;
1125                 break;
1126         }
1127
1128         default:
1129                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
1130                 BUG();
1131         }
1132
1133         /*
1134          * To avoid clobbering exit_reason, only check for signals if we
1135          * aren't already exiting to userspace for some other reason.
1136          */
1137         if (!(r & RESUME_HOST)) {
1138                 local_irq_disable();
1139                 s = kvmppc_prepare_to_enter(vcpu);
1140                 if (s <= 0) {
1141                         local_irq_enable();
1142                         r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
1143                 } else {
1144                         kvmppc_lazy_ee_enable();
1145                 }
1146         }
1147
1148         return r;
1149 }
1150
1151 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
1152 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1153 {
1154         int i;
1155         int r;
1156
1157         vcpu->arch.pc = 0;
1158         vcpu->arch.shared->pir = vcpu->vcpu_id;
1159         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
1160         kvmppc_set_msr(vcpu, 0);
1161
1162 #ifndef CONFIG_KVM_BOOKE_HV
1163         vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
1164         vcpu->arch.shadow_pid = 1;
1165         vcpu->arch.shared->msr = 0;
1166 #endif
1167
1168         /* Eye-catching numbers so we know if the guest takes an interrupt
1169          * before it's programmed its own IVPR/IVORs. */
1170         vcpu->arch.ivpr = 0x55550000;
1171         for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
1172                 vcpu->arch.ivor[i] = 0x7700 | i * 4;
1173
1174         kvmppc_init_timing_stats(vcpu);
1175
1176         r = kvmppc_core_vcpu_setup(vcpu);
1177         kvmppc_sanity_check(vcpu);
1178         return r;
1179 }
1180
1181 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
1182 {
1183         /* setup watchdog timer once */
1184         spin_lock_init(&vcpu->arch.wdt_lock);
1185         setup_timer(&vcpu->arch.wdt_timer, kvmppc_watchdog_func,
1186                     (unsigned long)vcpu);
1187
1188         return 0;
1189 }
1190
1191 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
1192 {
1193         del_timer_sync(&vcpu->arch.wdt_timer);
1194 }
1195
1196 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1197 {
1198         int i;
1199
1200         regs->pc = vcpu->arch.pc;
1201         regs->cr = kvmppc_get_cr(vcpu);
1202         regs->ctr = vcpu->arch.ctr;
1203         regs->lr = vcpu->arch.lr;
1204         regs->xer = kvmppc_get_xer(vcpu);
1205         regs->msr = vcpu->arch.shared->msr;
1206         regs->srr0 = vcpu->arch.shared->srr0;
1207         regs->srr1 = vcpu->arch.shared->srr1;
1208         regs->pid = vcpu->arch.pid;
1209         regs->sprg0 = vcpu->arch.shared->sprg0;
1210         regs->sprg1 = vcpu->arch.shared->sprg1;
1211         regs->sprg2 = vcpu->arch.shared->sprg2;
1212         regs->sprg3 = vcpu->arch.shared->sprg3;
1213         regs->sprg4 = vcpu->arch.shared->sprg4;
1214         regs->sprg5 = vcpu->arch.shared->sprg5;
1215         regs->sprg6 = vcpu->arch.shared->sprg6;
1216         regs->sprg7 = vcpu->arch.shared->sprg7;
1217
1218         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1219                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1220
1221         return 0;
1222 }
1223
1224 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1225 {
1226         int i;
1227
1228         vcpu->arch.pc = regs->pc;
1229         kvmppc_set_cr(vcpu, regs->cr);
1230         vcpu->arch.ctr = regs->ctr;
1231         vcpu->arch.lr = regs->lr;
1232         kvmppc_set_xer(vcpu, regs->xer);
1233         kvmppc_set_msr(vcpu, regs->msr);
1234         vcpu->arch.shared->srr0 = regs->srr0;
1235         vcpu->arch.shared->srr1 = regs->srr1;
1236         kvmppc_set_pid(vcpu, regs->pid);
1237         vcpu->arch.shared->sprg0 = regs->sprg0;
1238         vcpu->arch.shared->sprg1 = regs->sprg1;
1239         vcpu->arch.shared->sprg2 = regs->sprg2;
1240         vcpu->arch.shared->sprg3 = regs->sprg3;
1241         vcpu->arch.shared->sprg4 = regs->sprg4;
1242         vcpu->arch.shared->sprg5 = regs->sprg5;
1243         vcpu->arch.shared->sprg6 = regs->sprg6;
1244         vcpu->arch.shared->sprg7 = regs->sprg7;
1245
1246         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1247                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1248
1249         return 0;
1250 }
1251
1252 static void get_sregs_base(struct kvm_vcpu *vcpu,
1253                            struct kvm_sregs *sregs)
1254 {
1255         u64 tb = get_tb();
1256
1257         sregs->u.e.features |= KVM_SREGS_E_BASE;
1258
1259         sregs->u.e.csrr0 = vcpu->arch.csrr0;
1260         sregs->u.e.csrr1 = vcpu->arch.csrr1;
1261         sregs->u.e.mcsr = vcpu->arch.mcsr;
1262         sregs->u.e.esr = get_guest_esr(vcpu);
1263         sregs->u.e.dear = get_guest_dear(vcpu);
1264         sregs->u.e.tsr = vcpu->arch.tsr;
1265         sregs->u.e.tcr = vcpu->arch.tcr;
1266         sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1267         sregs->u.e.tb = tb;
1268         sregs->u.e.vrsave = vcpu->arch.vrsave;
1269 }
1270
1271 static int set_sregs_base(struct kvm_vcpu *vcpu,
1272                           struct kvm_sregs *sregs)
1273 {
1274         if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1275                 return 0;
1276
1277         vcpu->arch.csrr0 = sregs->u.e.csrr0;
1278         vcpu->arch.csrr1 = sregs->u.e.csrr1;
1279         vcpu->arch.mcsr = sregs->u.e.mcsr;
1280         set_guest_esr(vcpu, sregs->u.e.esr);
1281         set_guest_dear(vcpu, sregs->u.e.dear);
1282         vcpu->arch.vrsave = sregs->u.e.vrsave;
1283         kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1284
1285         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1286                 vcpu->arch.dec = sregs->u.e.dec;
1287                 kvmppc_emulate_dec(vcpu);
1288         }
1289
1290         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) {
1291                 u32 old_tsr = vcpu->arch.tsr;
1292
1293                 vcpu->arch.tsr = sregs->u.e.tsr;
1294
1295                 if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS))
1296                         arm_next_watchdog(vcpu);
1297
1298                 update_timer_ints(vcpu);
1299         }
1300
1301         return 0;
1302 }
1303
1304 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1305                               struct kvm_sregs *sregs)
1306 {
1307         sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1308
1309         sregs->u.e.pir = vcpu->vcpu_id;
1310         sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1311         sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1312         sregs->u.e.decar = vcpu->arch.decar;
1313         sregs->u.e.ivpr = vcpu->arch.ivpr;
1314 }
1315
1316 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1317                              struct kvm_sregs *sregs)
1318 {
1319         if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1320                 return 0;
1321
1322         if (sregs->u.e.pir != vcpu->vcpu_id)
1323                 return -EINVAL;
1324
1325         vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1326         vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1327         vcpu->arch.decar = sregs->u.e.decar;
1328         vcpu->arch.ivpr = sregs->u.e.ivpr;
1329
1330         return 0;
1331 }
1332
1333 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1334 {
1335         sregs->u.e.features |= KVM_SREGS_E_IVOR;
1336
1337         sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1338         sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1339         sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1340         sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1341         sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1342         sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1343         sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1344         sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1345         sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1346         sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1347         sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1348         sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1349         sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1350         sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1351         sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1352         sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1353 }
1354
1355 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1356 {
1357         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1358                 return 0;
1359
1360         vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1361         vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1362         vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1363         vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1364         vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1365         vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1366         vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1367         vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1368         vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1369         vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1370         vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1371         vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1372         vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1373         vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1374         vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1375         vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1376
1377         return 0;
1378 }
1379
1380 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1381                                   struct kvm_sregs *sregs)
1382 {
1383         sregs->pvr = vcpu->arch.pvr;
1384
1385         get_sregs_base(vcpu, sregs);
1386         get_sregs_arch206(vcpu, sregs);
1387         kvmppc_core_get_sregs(vcpu, sregs);
1388         return 0;
1389 }
1390
1391 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1392                                   struct kvm_sregs *sregs)
1393 {
1394         int ret;
1395
1396         if (vcpu->arch.pvr != sregs->pvr)
1397                 return -EINVAL;
1398
1399         ret = set_sregs_base(vcpu, sregs);
1400         if (ret < 0)
1401                 return ret;
1402
1403         ret = set_sregs_arch206(vcpu, sregs);
1404         if (ret < 0)
1405                 return ret;
1406
1407         return kvmppc_core_set_sregs(vcpu, sregs);
1408 }
1409
1410 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1411 {
1412         int r = -EINVAL;
1413
1414         switch (reg->id) {
1415         case KVM_REG_PPC_IAC1:
1416         case KVM_REG_PPC_IAC2:
1417         case KVM_REG_PPC_IAC3:
1418         case KVM_REG_PPC_IAC4: {
1419                 int iac = reg->id - KVM_REG_PPC_IAC1;
1420                 r = copy_to_user((u64 __user *)(long)reg->addr,
1421                                  &vcpu->arch.dbg_reg.iac[iac], sizeof(u64));
1422                 break;
1423         }
1424         case KVM_REG_PPC_DAC1:
1425         case KVM_REG_PPC_DAC2: {
1426                 int dac = reg->id - KVM_REG_PPC_DAC1;
1427                 r = copy_to_user((u64 __user *)(long)reg->addr,
1428                                  &vcpu->arch.dbg_reg.dac[dac], sizeof(u64));
1429                 break;
1430         }
1431         case KVM_REG_PPC_EPR: {
1432                 u32 epr = get_guest_epr(vcpu);
1433                 r = put_user(epr, (u32 __user *)(long)reg->addr);
1434                 break;
1435         }
1436 #if defined(CONFIG_64BIT)
1437         case KVM_REG_PPC_EPCR:
1438                 r = put_user(vcpu->arch.epcr, (u32 __user *)(long)reg->addr);
1439                 break;
1440 #endif
1441         default:
1442                 break;
1443         }
1444         return r;
1445 }
1446
1447 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1448 {
1449         int r = -EINVAL;
1450
1451         switch (reg->id) {
1452         case KVM_REG_PPC_IAC1:
1453         case KVM_REG_PPC_IAC2:
1454         case KVM_REG_PPC_IAC3:
1455         case KVM_REG_PPC_IAC4: {
1456                 int iac = reg->id - KVM_REG_PPC_IAC1;
1457                 r = copy_from_user(&vcpu->arch.dbg_reg.iac[iac],
1458                              (u64 __user *)(long)reg->addr, sizeof(u64));
1459                 break;
1460         }
1461         case KVM_REG_PPC_DAC1:
1462         case KVM_REG_PPC_DAC2: {
1463                 int dac = reg->id - KVM_REG_PPC_DAC1;
1464                 r = copy_from_user(&vcpu->arch.dbg_reg.dac[dac],
1465                              (u64 __user *)(long)reg->addr, sizeof(u64));
1466                 break;
1467         }
1468         case KVM_REG_PPC_EPR: {
1469                 u32 new_epr;
1470                 r = get_user(new_epr, (u32 __user *)(long)reg->addr);
1471                 if (!r)
1472                         kvmppc_set_epr(vcpu, new_epr);
1473                 break;
1474         }
1475 #if defined(CONFIG_64BIT)
1476         case KVM_REG_PPC_EPCR: {
1477                 u32 new_epcr;
1478                 r = get_user(new_epcr, (u32 __user *)(long)reg->addr);
1479                 if (r == 0)
1480                         kvmppc_set_epcr(vcpu, new_epcr);
1481                 break;
1482         }
1483 #endif
1484         default:
1485                 break;
1486         }
1487         return r;
1488 }
1489
1490 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1491 {
1492         return -ENOTSUPP;
1493 }
1494
1495 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1496 {
1497         return -ENOTSUPP;
1498 }
1499
1500 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1501                                   struct kvm_translation *tr)
1502 {
1503         int r;
1504
1505         r = kvmppc_core_vcpu_translate(vcpu, tr);
1506         return r;
1507 }
1508
1509 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1510 {
1511         return -ENOTSUPP;
1512 }
1513
1514 void kvmppc_core_free_memslot(struct kvm_memory_slot *free,
1515                               struct kvm_memory_slot *dont)
1516 {
1517 }
1518
1519 int kvmppc_core_create_memslot(struct kvm_memory_slot *slot,
1520                                unsigned long npages)
1521 {
1522         return 0;
1523 }
1524
1525 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1526                                       struct kvm_memory_slot *memslot,
1527                                       struct kvm_userspace_memory_region *mem)
1528 {
1529         return 0;
1530 }
1531
1532 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1533                                 struct kvm_userspace_memory_region *mem,
1534                                 struct kvm_memory_slot old)
1535 {
1536 }
1537
1538 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
1539 {
1540 }
1541
1542 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr)
1543 {
1544 #if defined(CONFIG_64BIT)
1545         vcpu->arch.epcr = new_epcr;
1546 #ifdef CONFIG_KVM_BOOKE_HV
1547         vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM;
1548         if (vcpu->arch.epcr  & SPRN_EPCR_ICM)
1549                 vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM;
1550 #endif
1551 #endif
1552 }
1553
1554 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1555 {
1556         vcpu->arch.tcr = new_tcr;
1557         arm_next_watchdog(vcpu);
1558         update_timer_ints(vcpu);
1559 }
1560
1561 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1562 {
1563         set_bits(tsr_bits, &vcpu->arch.tsr);
1564         smp_wmb();
1565         kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1566         kvm_vcpu_kick(vcpu);
1567 }
1568
1569 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1570 {
1571         clear_bits(tsr_bits, &vcpu->arch.tsr);
1572
1573         /*
1574          * We may have stopped the watchdog due to
1575          * being stuck on final expiration.
1576          */
1577         if (tsr_bits & (TSR_ENW | TSR_WIS))
1578                 arm_next_watchdog(vcpu);
1579
1580         update_timer_ints(vcpu);
1581 }
1582
1583 void kvmppc_decrementer_func(unsigned long data)
1584 {
1585         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
1586
1587         if (vcpu->arch.tcr & TCR_ARE) {
1588                 vcpu->arch.dec = vcpu->arch.decar;
1589                 kvmppc_emulate_dec(vcpu);
1590         }
1591
1592         kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1593 }
1594
1595 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1596 {
1597         vcpu->cpu = smp_processor_id();
1598         current->thread.kvm_vcpu = vcpu;
1599 }
1600
1601 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
1602 {
1603         current->thread.kvm_vcpu = NULL;
1604         vcpu->cpu = -1;
1605 }
1606
1607 int __init kvmppc_booke_init(void)
1608 {
1609 #ifndef CONFIG_KVM_BOOKE_HV
1610         unsigned long ivor[16];
1611         unsigned long *handler = kvmppc_booke_handler_addr;
1612         unsigned long max_ivor = 0;
1613         unsigned long handler_len;
1614         int i;
1615
1616         /* We install our own exception handlers by hijacking IVPR. IVPR must
1617          * be 16-bit aligned, so we need a 64KB allocation. */
1618         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
1619                                                  VCPU_SIZE_ORDER);
1620         if (!kvmppc_booke_handlers)
1621                 return -ENOMEM;
1622
1623         /* XXX make sure our handlers are smaller than Linux's */
1624
1625         /* Copy our interrupt handlers to match host IVORs. That way we don't
1626          * have to swap the IVORs on every guest/host transition. */
1627         ivor[0] = mfspr(SPRN_IVOR0);
1628         ivor[1] = mfspr(SPRN_IVOR1);
1629         ivor[2] = mfspr(SPRN_IVOR2);
1630         ivor[3] = mfspr(SPRN_IVOR3);
1631         ivor[4] = mfspr(SPRN_IVOR4);
1632         ivor[5] = mfspr(SPRN_IVOR5);
1633         ivor[6] = mfspr(SPRN_IVOR6);
1634         ivor[7] = mfspr(SPRN_IVOR7);
1635         ivor[8] = mfspr(SPRN_IVOR8);
1636         ivor[9] = mfspr(SPRN_IVOR9);
1637         ivor[10] = mfspr(SPRN_IVOR10);
1638         ivor[11] = mfspr(SPRN_IVOR11);
1639         ivor[12] = mfspr(SPRN_IVOR12);
1640         ivor[13] = mfspr(SPRN_IVOR13);
1641         ivor[14] = mfspr(SPRN_IVOR14);
1642         ivor[15] = mfspr(SPRN_IVOR15);
1643
1644         for (i = 0; i < 16; i++) {
1645                 if (ivor[i] > max_ivor)
1646                         max_ivor = i;
1647
1648                 handler_len = handler[i + 1] - handler[i];
1649                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
1650                        (void *)handler[i], handler_len);
1651         }
1652
1653         handler_len = handler[max_ivor + 1] - handler[max_ivor];
1654         flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers +
1655                            ivor[max_ivor] + handler_len);
1656 #endif /* !BOOKE_HV */
1657         return 0;
1658 }
1659
1660 void __exit kvmppc_booke_exit(void)
1661 {
1662         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
1663         kvm_exit();
1664 }