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
  44 #define CREATE_TRACE_POINTS
  45 #include "trace_booke.h"
  46
  47 unsigned long kvmppc_booke_handlers;
  48
  49 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
  50 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  51
  52 struct kvm_stats_debugfs_item debugfs_entries[] = {
  53         { "mmio",       VCPU_STAT(mmio_exits) },
  54         { "sig",        VCPU_STAT(signal_exits) },
  55         { "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
  56         { "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
  57         { "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
  58         { "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
  59         { "sysc",       VCPU_STAT(syscall_exits) },
  60         { "isi",        VCPU_STAT(isi_exits) },
  61         { "dsi",        VCPU_STAT(dsi_exits) },
  62         { "inst_emu",   VCPU_STAT(emulated_inst_exits) },
  63         { "dec",        VCPU_STAT(dec_exits) },
  64         { "ext_intr",   VCPU_STAT(ext_intr_exits) },
  65         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  66         { "doorbell", VCPU_STAT(dbell_exits) },
  67         { "guest doorbell", VCPU_STAT(gdbell_exits) },
  68         { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
  69         { NULL }
  70 };
  71
  72 /* TODO: use vcpu_printf() */
  73 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
  74 {
  75         int i;
  76
  77         printk("pc:   %08lx msr:  %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
  78         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
  79         printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
  80                                             vcpu->arch.shared->srr1);
  81
  82         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  83
  84         for (i = 0; i < 32; i += 4) {
  85                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  86                        kvmppc_get_gpr(vcpu, i),
  87                        kvmppc_get_gpr(vcpu, i+1),
  88                        kvmppc_get_gpr(vcpu, i+2),
  89                        kvmppc_get_gpr(vcpu, i+3));
  90         }
  91 }
  92
  93 #ifdef CONFIG_SPE
  94 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
  95 {
  96         preempt_disable();
  97         enable_kernel_spe();
  98         kvmppc_save_guest_spe(vcpu);
  99         vcpu->arch.shadow_msr &= ~MSR_SPE;
 100         preempt_enable();
 101 }
 102
 103 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
 104 {
 105         preempt_disable();
 106         enable_kernel_spe();
 107         kvmppc_load_guest_spe(vcpu);
 108         vcpu->arch.shadow_msr |= MSR_SPE;
 109         preempt_enable();
 110 }
 111
 112 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 113 {
 114         if (vcpu->arch.shared->msr & MSR_SPE) {
 115                 if (!(vcpu->arch.shadow_msr & MSR_SPE))
 116                         kvmppc_vcpu_enable_spe(vcpu);
 117         } else if (vcpu->arch.shadow_msr & MSR_SPE) {
 118                 kvmppc_vcpu_disable_spe(vcpu);
 119         }
 120 }
 121 #else
 122 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 123 {
 124 }
 125 #endif
 126
 127 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
 128 {
 129 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV)
 130         /* We always treat the FP bit as enabled from the host
 131            perspective, so only need to adjust the shadow MSR */
 132         vcpu->arch.shadow_msr &= ~MSR_FP;
 133         vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP;
 134 #endif
 135 }
 136
 137 static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu)
 138 {
 139         /* Synchronize guest's desire to get debug interrupts into shadow MSR */
 140 #ifndef CONFIG_KVM_BOOKE_HV
 141         vcpu->arch.shadow_msr &= ~MSR_DE;
 142         vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_DE;
 143 #endif
 144
 145         /* Force enable debug interrupts when user space wants to debug */
 146         if (vcpu->guest_debug) {
 147 #ifdef CONFIG_KVM_BOOKE_HV
 148                 /*
 149                  * Since there is no shadow MSR, sync MSR_DE into the guest
 150                  * visible MSR.
 151                  */
 152                 vcpu->arch.shared->msr |= MSR_DE;
 153 #else
 154                 vcpu->arch.shadow_msr |= MSR_DE;
 155                 vcpu->arch.shared->msr &= ~MSR_DE;
 156 #endif
 157         }
 158 }
 159
 160 /*
 161  * Helper function for "full" MSR writes.  No need to call this if only
 162  * EE/CE/ME/DE/RI are changing.
 163  */
 164 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
 165 {
 166         u32 old_msr = vcpu->arch.shared->msr;
 167
 168 #ifdef CONFIG_KVM_BOOKE_HV
 169         new_msr |= MSR_GS;
 170 #endif
 171
 172         vcpu->arch.shared->msr = new_msr;
 173
 174         kvmppc_mmu_msr_notify(vcpu, old_msr);
 175         kvmppc_vcpu_sync_spe(vcpu);
 176         kvmppc_vcpu_sync_fpu(vcpu);
 177         kvmppc_vcpu_sync_debug(vcpu);
 178 }
 179
 180 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
 181                                        unsigned int priority)
 182 {
 183         trace_kvm_booke_queue_irqprio(vcpu, priority);
 184         set_bit(priority, &vcpu->arch.pending_exceptions);
 185 }
 186
 187 void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
 188                                  ulong dear_flags, ulong esr_flags)
 189 {
 190         vcpu->arch.queued_dear = dear_flags;
 191         vcpu->arch.queued_esr = esr_flags;
 192         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
 193 }
 194
 195 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
 196                                     ulong dear_flags, ulong esr_flags)
 197 {
 198         vcpu->arch.queued_dear = dear_flags;
 199         vcpu->arch.queued_esr = esr_flags;
 200         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 201 }
 202
 203 void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu)
 204 {
 205         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 206 }
 207
 208 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong esr_flags)
 209 {
 210         vcpu->arch.queued_esr = esr_flags;
 211         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 212 }
 213
 214 static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags,
 215                                         ulong esr_flags)
 216 {
 217         vcpu->arch.queued_dear = dear_flags;
 218         vcpu->arch.queued_esr = esr_flags;
 219         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT);
 220 }
 221
 222 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
 223 {
 224         vcpu->arch.queued_esr = esr_flags;
 225         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 226 }
 227
 228 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 229 {
 230         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
 231 }
 232
 233 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 234 {
 235         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 236 }
 237
 238 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 239 {
 240         clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 241 }
 242
 243 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 244                                 struct kvm_interrupt *irq)
 245 {
 246         unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
 247
 248         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 249                 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
 250
 251         kvmppc_booke_queue_irqprio(vcpu, prio);
 252 }
 253
 254 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 255 {
 256         clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
 257         clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
 258 }
 259
 260 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu)
 261 {
 262         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG);
 263 }
 264
 265 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu)
 266 {
 267         clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions);
 268 }
 269
 270 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 271 {
 272         kvmppc_set_srr0(vcpu, srr0);
 273         kvmppc_set_srr1(vcpu, srr1);
 274 }
 275
 276 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 277 {
 278         vcpu->arch.csrr0 = srr0;
 279         vcpu->arch.csrr1 = srr1;
 280 }
 281
 282 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 283 {
 284         if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
 285                 vcpu->arch.dsrr0 = srr0;
 286                 vcpu->arch.dsrr1 = srr1;
 287         } else {
 288                 set_guest_csrr(vcpu, srr0, srr1);
 289         }
 290 }
 291
 292 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 293 {
 294         vcpu->arch.mcsrr0 = srr0;
 295         vcpu->arch.mcsrr1 = srr1;
 296 }
 297
 298 /* Deliver the interrupt of the corresponding priority, if possible. */
 299 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 300                                         unsigned int priority)
 301 {
 302         int allowed = 0;
 303         ulong msr_mask = 0;
 304         bool update_esr = false, update_dear = false, update_epr = false;
 305         ulong crit_raw = vcpu->arch.shared->critical;
 306         ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
 307         bool crit;
 308         bool keep_irq = false;
 309         enum int_class int_class;
 310         ulong new_msr = vcpu->arch.shared->msr;
 311
 312         /* Truncate crit indicators in 32 bit mode */
 313         if (!(vcpu->arch.shared->msr & MSR_SF)) {
 314                 crit_raw &= 0xffffffff;
 315                 crit_r1 &= 0xffffffff;
 316         }
 317
 318         /* Critical section when crit == r1 */
 319         crit = (crit_raw == crit_r1);
 320         /* ... and we're in supervisor mode */
 321         crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 322
 323         if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
 324                 priority = BOOKE_IRQPRIO_EXTERNAL;
 325                 keep_irq = true;
 326         }
 327
 328         if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags)
 329                 update_epr = true;
 330
 331         switch (priority) {
 332         case BOOKE_IRQPRIO_DTLB_MISS:
 333         case BOOKE_IRQPRIO_DATA_STORAGE:
 334         case BOOKE_IRQPRIO_ALIGNMENT:
 335                 update_dear = true;
 336                 /* fall through */
 337         case BOOKE_IRQPRIO_INST_STORAGE:
 338         case BOOKE_IRQPRIO_PROGRAM:
 339                 update_esr = true;
 340                 /* fall through */
 341         case BOOKE_IRQPRIO_ITLB_MISS:
 342         case BOOKE_IRQPRIO_SYSCALL:
 343         case BOOKE_IRQPRIO_FP_UNAVAIL:
 344         case BOOKE_IRQPRIO_SPE_UNAVAIL:
 345         case BOOKE_IRQPRIO_SPE_FP_DATA:
 346         case BOOKE_IRQPRIO_SPE_FP_ROUND:
 347         case BOOKE_IRQPRIO_AP_UNAVAIL:
 348                 allowed = 1;
 349                 msr_mask = MSR_CE | MSR_ME | MSR_DE;
 350                 int_class = INT_CLASS_NONCRIT;
 351                 break;
 352         case BOOKE_IRQPRIO_WATCHDOG:
 353         case BOOKE_IRQPRIO_CRITICAL:
 354         case BOOKE_IRQPRIO_DBELL_CRIT:
 355                 allowed = vcpu->arch.shared->msr & MSR_CE;
 356                 allowed = allowed && !crit;
 357                 msr_mask = MSR_ME;
 358                 int_class = INT_CLASS_CRIT;
 359                 break;
 360         case BOOKE_IRQPRIO_MACHINE_CHECK:
 361                 allowed = vcpu->arch.shared->msr & MSR_ME;
 362                 allowed = allowed && !crit;
 363                 int_class = INT_CLASS_MC;
 364                 break;
 365         case BOOKE_IRQPRIO_DECREMENTER:
 366         case BOOKE_IRQPRIO_FIT:
 367                 keep_irq = true;
 368                 /* fall through */
 369         case BOOKE_IRQPRIO_EXTERNAL:
 370         case BOOKE_IRQPRIO_DBELL:
 371                 allowed = vcpu->arch.shared->msr & MSR_EE;
 372                 allowed = allowed && !crit;
 373                 msr_mask = MSR_CE | MSR_ME | MSR_DE;
 374                 int_class = INT_CLASS_NONCRIT;
 375                 break;
 376         case BOOKE_IRQPRIO_DEBUG:
 377                 allowed = vcpu->arch.shared->msr & MSR_DE;
 378                 allowed = allowed && !crit;
 379                 msr_mask = MSR_ME;
 380                 int_class = INT_CLASS_CRIT;
 381                 break;
 382         }
 383
 384         if (allowed) {
 385                 switch (int_class) {
 386                 case INT_CLASS_NONCRIT:
 387                         set_guest_srr(vcpu, vcpu->arch.pc,
 388                                       vcpu->arch.shared->msr);
 389                         break;
 390                 case INT_CLASS_CRIT:
 391                         set_guest_csrr(vcpu, vcpu->arch.pc,
 392                                        vcpu->arch.shared->msr);
 393                         break;
 394                 case INT_CLASS_DBG:
 395                         set_guest_dsrr(vcpu, vcpu->arch.pc,
 396                                        vcpu->arch.shared->msr);
 397                         break;
 398                 case INT_CLASS_MC:
 399                         set_guest_mcsrr(vcpu, vcpu->arch.pc,
 400                                         vcpu->arch.shared->msr);
 401                         break;
 402                 }
 403
 404                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 405                 if (update_esr == true)
 406                         kvmppc_set_esr(vcpu, vcpu->arch.queued_esr);
 407                 if (update_dear == true)
 408                         kvmppc_set_dar(vcpu, vcpu->arch.queued_dear);
 409                 if (update_epr == true) {
 410                         if (vcpu->arch.epr_flags & KVMPPC_EPR_USER)
 411                                 kvm_make_request(KVM_REQ_EPR_EXIT, vcpu);
 412                         else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) {
 413                                 BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC);
 414                                 kvmppc_mpic_set_epr(vcpu);
 415                         }
 416                 }
 417
 418                 new_msr &= msr_mask;
 419 #if defined(CONFIG_64BIT)
 420                 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
 421                         new_msr |= MSR_CM;
 422 #endif
 423                 kvmppc_set_msr(vcpu, new_msr);
 424
 425                 if (!keep_irq)
 426                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 427         }
 428
 429 #ifdef CONFIG_KVM_BOOKE_HV
 430         /*
 431          * If an interrupt is pending but masked, raise a guest doorbell
 432          * so that we are notified when the guest enables the relevant
 433          * MSR bit.
 434          */
 435         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
 436                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
 437         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
 438                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
 439         if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
 440                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
 441 #endif
 442
 443         return allowed;
 444 }
 445
 446 /*
 447  * Return the number of jiffies until the next timeout.  If the timeout is
 448  * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA
 449  * because the larger value can break the timer APIs.
 450  */
 451 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu)
 452 {
 453         u64 tb, wdt_tb, wdt_ticks = 0;
 454         u64 nr_jiffies = 0;
 455         u32 period = TCR_GET_WP(vcpu->arch.tcr);
 456
 457         wdt_tb = 1ULL << (63 - period);
 458         tb = get_tb();
 459         /*
 460          * The watchdog timeout will hapeen when TB bit corresponding
 461          * to watchdog will toggle from 0 to 1.
 462          */
 463         if (tb & wdt_tb)
 464                 wdt_ticks = wdt_tb;
 465
 466         wdt_ticks += wdt_tb - (tb & (wdt_tb - 1));
 467
 468         /* Convert timebase ticks to jiffies */
 469         nr_jiffies = wdt_ticks;
 470
 471         if (do_div(nr_jiffies, tb_ticks_per_jiffy))
 472                 nr_jiffies++;
 473
 474         return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA);
 475 }
 476
 477 static void arm_next_watchdog(struct kvm_vcpu *vcpu)
 478 {
 479         unsigned long nr_jiffies;
 480         unsigned long flags;
 481
 482         /*
 483          * If TSR_ENW and TSR_WIS are not set then no need to exit to
 484          * userspace, so clear the KVM_REQ_WATCHDOG request.
 485          */
 486         if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS))
 487                 clear_bit(KVM_REQ_WATCHDOG, &vcpu->requests);
 488
 489         spin_lock_irqsave(&vcpu->arch.wdt_lock, flags);
 490         nr_jiffies = watchdog_next_timeout(vcpu);
 491         /*
 492          * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA
 493          * then do not run the watchdog timer as this can break timer APIs.
 494          */
 495         if (nr_jiffies < NEXT_TIMER_MAX_DELTA)
 496                 mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies);
 497         else
 498                 del_timer(&vcpu->arch.wdt_timer);
 499         spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags);
 500 }
 501
 502 void kvmppc_watchdog_func(unsigned long data)
 503 {
 504         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
 505         u32 tsr, new_tsr;
 506         int final;
 507
 508         do {
 509                 new_tsr = tsr = vcpu->arch.tsr;
 510                 final = 0;
 511
 512                 /* Time out event */
 513                 if (tsr & TSR_ENW) {
 514                         if (tsr & TSR_WIS)
 515                                 final = 1;
 516                         else
 517                                 new_tsr = tsr | TSR_WIS;
 518                 } else {
 519                         new_tsr = tsr | TSR_ENW;
 520                 }
 521         } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr);
 522
 523         if (new_tsr & TSR_WIS) {
 524                 smp_wmb();
 525                 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
 526                 kvm_vcpu_kick(vcpu);
 527         }
 528
 529         /*
 530          * If this is final watchdog expiry and some action is required
 531          * then exit to userspace.
 532          */
 533         if (final && (vcpu->arch.tcr & TCR_WRC_MASK) &&
 534             vcpu->arch.watchdog_enabled) {
 535                 smp_wmb();
 536                 kvm_make_request(KVM_REQ_WATCHDOG, vcpu);
 537                 kvm_vcpu_kick(vcpu);
 538         }
 539
 540         /*
 541          * Stop running the watchdog timer after final expiration to
 542          * prevent the host from being flooded with timers if the
 543          * guest sets a short period.
 544          * Timers will resume when TSR/TCR is updated next time.
 545          */
 546         if (!final)
 547                 arm_next_watchdog(vcpu);
 548 }
 549
 550 static void update_timer_ints(struct kvm_vcpu *vcpu)
 551 {
 552         if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
 553                 kvmppc_core_queue_dec(vcpu);
 554         else
 555                 kvmppc_core_dequeue_dec(vcpu);
 556
 557         if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS))
 558                 kvmppc_core_queue_watchdog(vcpu);
 559         else
 560                 kvmppc_core_dequeue_watchdog(vcpu);
 561 }
 562
 563 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
 564 {
 565         unsigned long *pending = &vcpu->arch.pending_exceptions;
 566         unsigned int priority;
 567
 568         priority = __ffs(*pending);
 569         while (priority < BOOKE_IRQPRIO_MAX) {
 570                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 571                         break;
 572
 573                 priority = find_next_bit(pending,
 574                                          BITS_PER_BYTE * sizeof(*pending),
 575                                          priority + 1);
 576         }
 577
 578         /* Tell the guest about our interrupt status */
 579         vcpu->arch.shared->int_pending = !!*pending;
 580 }
 581
 582 /* Check pending exceptions and deliver one, if possible. */
 583 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 584 {
 585         int r = 0;
 586         WARN_ON_ONCE(!irqs_disabled());
 587
 588         kvmppc_core_check_exceptions(vcpu);
 589
 590         if (vcpu->requests) {
 591                 /* Exception delivery raised request; start over */
 592                 return 1;
 593         }
 594
 595         if (vcpu->arch.shared->msr & MSR_WE) {
 596                 local_irq_enable();
 597                 kvm_vcpu_block(vcpu);
 598                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 599                 hard_irq_disable();
 600
 601                 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
 602                 r = 1;
 603         };
 604
 605         return r;
 606 }
 607
 608 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 609 {
 610         int r = 1; /* Indicate we want to get back into the guest */
 611
 612         if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
 613                 update_timer_ints(vcpu);
 614 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 615         if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
 616                 kvmppc_core_flush_tlb(vcpu);
 617 #endif
 618
 619         if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) {
 620                 vcpu->run->exit_reason = KVM_EXIT_WATCHDOG;
 621                 r = 0;
 622         }
 623
 624         if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) {
 625                 vcpu->run->epr.epr = 0;
 626                 vcpu->arch.epr_needed = true;
 627                 vcpu->run->exit_reason = KVM_EXIT_EPR;
 628                 r = 0;
 629         }
 630
 631         return r;
 632 }
 633
 634 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 635 {
 636         int ret, s;
 637         struct debug_reg debug;
 638
 639         if (!vcpu->arch.sane) {
 640                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 641                 return -EINVAL;
 642         }
 643
 644         s = kvmppc_prepare_to_enter(vcpu);
 645         if (s <= 0) {
 646                 ret = s;
 647                 goto out;
 648         }
 649         /* interrupts now hard-disabled */
 650
 651 #ifdef CONFIG_PPC_FPU
 652         /* Save userspace FPU state in stack */
 653         enable_kernel_fp();
 654
 655         /*
 656          * Since we can't trap on MSR_FP in GS-mode, we consider the guest
 657          * as always using the FPU.  Kernel usage of FP (via
 658          * enable_kernel_fp()) in this thread must not occur while
 659          * vcpu->fpu_active is set.
 660          */
 661         vcpu->fpu_active = 1;
 662
 663         kvmppc_load_guest_fp(vcpu);
 664 #endif
 665
 666         /* Switch to guest debug context */
 667         debug = vcpu->arch.shadow_dbg_reg;
 668         switch_booke_debug_regs(&debug);
 669         debug = current->thread.debug;
 670         current->thread.debug = vcpu->arch.shadow_dbg_reg;
 671
 672         vcpu->arch.pgdir = current->mm->pgd;
 673         kvmppc_fix_ee_before_entry();
 674
 675         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
 676
 677         /* No need for kvm_guest_exit. It's done in handle_exit.
 678            We also get here with interrupts enabled. */
 679
 680         /* Switch back to user space debug context */
 681         switch_booke_debug_regs(&debug);
 682         current->thread.debug = debug;
 683
 684 #ifdef CONFIG_PPC_FPU
 685         kvmppc_save_guest_fp(vcpu);
 686
 687         vcpu->fpu_active = 0;
 688 #endif
 689
 690 out:
 691         vcpu->mode = OUTSIDE_GUEST_MODE;
 692         return ret;
 693 }
 694
 695 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
 696 {
 697         enum emulation_result er;
 698
 699         er = kvmppc_emulate_instruction(run, vcpu);
 700         switch (er) {
 701         case EMULATE_DONE:
 702                 /* don't overwrite subtypes, just account kvm_stats */
 703                 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 704                 /* Future optimization: only reload non-volatiles if
 705                  * they were actually modified by emulation. */
 706                 return RESUME_GUEST_NV;
 707
 708         case EMULATE_AGAIN:
 709                 return RESUME_GUEST;
 710
 711         case EMULATE_FAIL:
 712                 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 713                        __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 714                 /* For debugging, encode the failing instruction and
 715                  * report it to userspace. */
 716                 run->hw.hardware_exit_reason = ~0ULL << 32;
 717                 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 718                 kvmppc_core_queue_program(vcpu, ESR_PIL);
 719                 return RESUME_HOST;
 720
 721         case EMULATE_EXIT_USER:
 722                 return RESUME_HOST;
 723
 724         default:
 725                 BUG();
 726         }
 727 }
 728
 729 static int kvmppc_handle_debug(struct kvm_run *run, struct kvm_vcpu *vcpu)
 730 {
 731         struct debug_reg *dbg_reg = &(vcpu->arch.shadow_dbg_reg);
 732         u32 dbsr = vcpu->arch.dbsr;
 733
 734         run->debug.arch.status = 0;
 735         run->debug.arch.address = vcpu->arch.pc;
 736
 737         if (dbsr & (DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4)) {
 738                 run->debug.arch.status |= KVMPPC_DEBUG_BREAKPOINT;
 739         } else {
 740                 if (dbsr & (DBSR_DAC1W | DBSR_DAC2W))
 741                         run->debug.arch.status |= KVMPPC_DEBUG_WATCH_WRITE;
 742                 else if (dbsr & (DBSR_DAC1R | DBSR_DAC2R))
 743                         run->debug.arch.status |= KVMPPC_DEBUG_WATCH_READ;
 744                 if (dbsr & (DBSR_DAC1R | DBSR_DAC1W))
 745                         run->debug.arch.address = dbg_reg->dac1;
 746                 else if (dbsr & (DBSR_DAC2R | DBSR_DAC2W))
 747                         run->debug.arch.address = dbg_reg->dac2;
 748         }
 749
 750         return RESUME_HOST;
 751 }
 752
 753 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
 754 {
 755         ulong r1, ip, msr, lr;
 756
 757         asm("mr %0, 1" : "=r"(r1));
 758         asm("mflr %0" : "=r"(lr));
 759         asm("mfmsr %0" : "=r"(msr));
 760         asm("bl 1f; 1: mflr %0" : "=r"(ip));
 761
 762         memset(regs, 0, sizeof(*regs));
 763         regs->gpr[1] = r1;
 764         regs->nip = ip;
 765         regs->msr = msr;
 766         regs->link = lr;
 767 }
 768
 769 /*
 770  * For interrupts needed to be handled by host interrupt handlers,
 771  * corresponding host handler are called from here in similar way
 772  * (but not exact) as they are called from low level handler
 773  * (such as from arch/powerpc/kernel/head_fsl_booke.S).
 774  */
 775 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
 776                                      unsigned int exit_nr)
 777 {
 778         struct pt_regs regs;
 779
 780         switch (exit_nr) {
 781         case BOOKE_INTERRUPT_EXTERNAL:
 782                 kvmppc_fill_pt_regs(&regs);
 783                 do_IRQ(&regs);
 784                 break;
 785         case BOOKE_INTERRUPT_DECREMENTER:
 786                 kvmppc_fill_pt_regs(&regs);
 787                 timer_interrupt(&regs);
 788                 break;
 789 #if defined(CONFIG_PPC_DOORBELL)
 790         case BOOKE_INTERRUPT_DOORBELL:
 791                 kvmppc_fill_pt_regs(&regs);
 792                 doorbell_exception(&regs);
 793                 break;
 794 #endif
 795         case BOOKE_INTERRUPT_MACHINE_CHECK:
 796                 /* FIXME */
 797                 break;
 798         case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
 799                 kvmppc_fill_pt_regs(&regs);
 800                 performance_monitor_exception(&regs);
 801                 break;
 802         case BOOKE_INTERRUPT_WATCHDOG:
 803                 kvmppc_fill_pt_regs(&regs);
 804 #ifdef CONFIG_BOOKE_WDT
 805                 WatchdogException(&regs);
 806 #else
 807                 unknown_exception(&regs);
 808 #endif
 809                 break;
 810         case BOOKE_INTERRUPT_CRITICAL:
 811                 unknown_exception(&regs);
 812                 break;
 813         case BOOKE_INTERRUPT_DEBUG:
 814                 /* Save DBSR before preemption is enabled */
 815                 vcpu->arch.dbsr = mfspr(SPRN_DBSR);
 816                 kvmppc_clear_dbsr();
 817                 break;
 818         }
 819 }
 820
 821 static int kvmppc_resume_inst_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 822                                   enum emulation_result emulated, u32 last_inst)
 823 {
 824         switch (emulated) {
 825         case EMULATE_AGAIN:
 826                 return RESUME_GUEST;
 827
 828         case EMULATE_FAIL:
 829                 pr_debug("%s: load instruction from guest address %lx failed\n",
 830                        __func__, vcpu->arch.pc);
 831                 /* For debugging, encode the failing instruction and
 832                  * report it to userspace. */
 833                 run->hw.hardware_exit_reason = ~0ULL << 32;
 834                 run->hw.hardware_exit_reason |= last_inst;
 835                 kvmppc_core_queue_program(vcpu, ESR_PIL);
 836                 return RESUME_HOST;
 837
 838         default:
 839                 BUG();
 840         }
 841 }
 842
 843 /**
 844  * kvmppc_handle_exit
 845  *
 846  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 847  */
 848 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 849                        unsigned int exit_nr)
 850 {
 851         int r = RESUME_HOST;
 852         int s;
 853         int idx;
 854         u32 last_inst = KVM_INST_FETCH_FAILED;
 855         enum emulation_result emulated = EMULATE_DONE;
 856
 857         /* update before a new last_exit_type is rewritten */
 858         kvmppc_update_timing_stats(vcpu);
 859
 860         /* restart interrupts if they were meant for the host */
 861         kvmppc_restart_interrupt(vcpu, exit_nr);
 862
 863         /*
 864          * get last instruction before beeing preempted
 865          * TODO: for e6500 check also BOOKE_INTERRUPT_LRAT_ERROR & ESR_DATA
 866          */
 867         switch (exit_nr) {
 868         case BOOKE_INTERRUPT_DATA_STORAGE:
 869         case BOOKE_INTERRUPT_DTLB_MISS:
 870         case BOOKE_INTERRUPT_HV_PRIV:
 871                 emulated = kvmppc_get_last_inst(vcpu, false, &last_inst);
 872                 break;
 873         default:
 874                 break;
 875         }
 876
 877         local_irq_enable();
 878
 879         trace_kvm_exit(exit_nr, vcpu);
 880         kvm_guest_exit();
 881
 882         run->exit_reason = KVM_EXIT_UNKNOWN;
 883         run->ready_for_interrupt_injection = 1;
 884
 885         if (emulated != EMULATE_DONE) {
 886                 r = kvmppc_resume_inst_load(run, vcpu, emulated, last_inst);
 887                 goto out;
 888         }
 889
 890         switch (exit_nr) {
 891         case BOOKE_INTERRUPT_MACHINE_CHECK:
 892                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 893                 kvmppc_dump_vcpu(vcpu);
 894                 /* For debugging, send invalid exit reason to user space */
 895                 run->hw.hardware_exit_reason = ~1ULL << 32;
 896                 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
 897                 r = RESUME_HOST;
 898                 break;
 899
 900         case BOOKE_INTERRUPT_EXTERNAL:
 901                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 902                 r = RESUME_GUEST;
 903                 break;
 904
 905         case BOOKE_INTERRUPT_DECREMENTER:
 906                 kvmppc_account_exit(vcpu, DEC_EXITS);
 907                 r = RESUME_GUEST;
 908                 break;
 909
 910         case BOOKE_INTERRUPT_WATCHDOG:
 911                 r = RESUME_GUEST;
 912                 break;
 913
 914         case BOOKE_INTERRUPT_DOORBELL:
 915                 kvmppc_account_exit(vcpu, DBELL_EXITS);
 916                 r = RESUME_GUEST;
 917                 break;
 918
 919         case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
 920                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 921
 922                 /*
 923                  * We are here because there is a pending guest interrupt
 924                  * which could not be delivered as MSR_CE or MSR_ME was not
 925                  * set.  Once we break from here we will retry delivery.
 926                  */
 927                 r = RESUME_GUEST;
 928                 break;
 929
 930         case BOOKE_INTERRUPT_GUEST_DBELL:
 931                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 932
 933                 /*
 934                  * We are here because there is a pending guest interrupt
 935                  * which could not be delivered as MSR_EE was not set.  Once
 936                  * we break from here we will retry delivery.
 937                  */
 938                 r = RESUME_GUEST;
 939                 break;
 940
 941         case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
 942                 r = RESUME_GUEST;
 943                 break;
 944
 945         case BOOKE_INTERRUPT_HV_PRIV:
 946                 r = emulation_exit(run, vcpu);
 947                 break;
 948
 949         case BOOKE_INTERRUPT_PROGRAM:
 950                 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
 951                         /*
 952                          * Program traps generated by user-level software must
 953                          * be handled by the guest kernel.
 954                          *
 955                          * In GS mode, hypervisor privileged instructions trap
 956                          * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
 957                          * actual program interrupts, handled by the guest.
 958                          */
 959                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
 960                         r = RESUME_GUEST;
 961                         kvmppc_account_exit(vcpu, USR_PR_INST);
 962                         break;
 963                 }
 964
 965                 r = emulation_exit(run, vcpu);
 966                 break;
 967
 968         case BOOKE_INTERRUPT_FP_UNAVAIL:
 969                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 970                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 971                 r = RESUME_GUEST;
 972                 break;
 973
 974 #ifdef CONFIG_SPE
 975         case BOOKE_INTERRUPT_SPE_UNAVAIL: {
 976                 if (vcpu->arch.shared->msr & MSR_SPE)
 977                         kvmppc_vcpu_enable_spe(vcpu);
 978                 else
 979                         kvmppc_booke_queue_irqprio(vcpu,
 980                                                    BOOKE_IRQPRIO_SPE_UNAVAIL);
 981                 r = RESUME_GUEST;
 982                 break;
 983         }
 984
 985         case BOOKE_INTERRUPT_SPE_FP_DATA:
 986                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 987                 r = RESUME_GUEST;
 988                 break;
 989
 990         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 991                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 992                 r = RESUME_GUEST;
 993                 break;
 994 #else
 995         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 996                 /*
 997                  * Guest wants SPE, but host kernel doesn't support it.  Send
 998                  * an "unimplemented operation" program check to the guest.
 999                  */
1000                 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
1001                 r = RESUME_GUEST;
1002                 break;
1003
1004         /*
1005          * These really should never happen without CONFIG_SPE,
1006          * as we should never enable the real MSR[SPE] in the guest.
1007          */
1008         case BOOKE_INTERRUPT_SPE_FP_DATA:
1009         case BOOKE_INTERRUPT_SPE_FP_ROUND:
1010                 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
1011                        __func__, exit_nr, vcpu->arch.pc);
1012                 run->hw.hardware_exit_reason = exit_nr;
1013                 r = RESUME_HOST;
1014                 break;
1015 #endif
1016
1017         case BOOKE_INTERRUPT_DATA_STORAGE:
1018                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
1019                                                vcpu->arch.fault_esr);
1020                 kvmppc_account_exit(vcpu, DSI_EXITS);
1021                 r = RESUME_GUEST;
1022                 break;
1023
1024         case BOOKE_INTERRUPT_INST_STORAGE:
1025                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
1026                 kvmppc_account_exit(vcpu, ISI_EXITS);
1027                 r = RESUME_GUEST;
1028                 break;
1029
1030         case BOOKE_INTERRUPT_ALIGNMENT:
1031                 kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear,
1032                                             vcpu->arch.fault_esr);
1033                 r = RESUME_GUEST;
1034                 break;
1035
1036 #ifdef CONFIG_KVM_BOOKE_HV
1037         case BOOKE_INTERRUPT_HV_SYSCALL:
1038                 if (!(vcpu->arch.shared->msr & MSR_PR)) {
1039                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1040                 } else {
1041                         /*
1042                          * hcall from guest userspace -- send privileged
1043                          * instruction program check.
1044                          */
1045                         kvmppc_core_queue_program(vcpu, ESR_PPR);
1046                 }
1047
1048                 r = RESUME_GUEST;
1049                 break;
1050 #else
1051         case BOOKE_INTERRUPT_SYSCALL:
1052                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1053                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1054                         /* KVM PV hypercalls */
1055                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1056                         r = RESUME_GUEST;
1057                 } else {
1058                         /* Guest syscalls */
1059                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
1060                 }
1061                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
1062                 r = RESUME_GUEST;
1063                 break;
1064 #endif
1065
1066         case BOOKE_INTERRUPT_DTLB_MISS: {
1067                 unsigned long eaddr = vcpu->arch.fault_dear;
1068                 int gtlb_index;
1069                 gpa_t gpaddr;
1070                 gfn_t gfn;
1071
1072 #ifdef CONFIG_KVM_E500V2
1073                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1074                     (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1075                         kvmppc_map_magic(vcpu);
1076                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1077                         r = RESUME_GUEST;
1078
1079                         break;
1080                 }
1081 #endif
1082
1083                 /* Check the guest TLB. */
1084                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1085                 if (gtlb_index < 0) {
1086                         /* The guest didn't have a mapping for it. */
1087                         kvmppc_core_queue_dtlb_miss(vcpu,
1088                                                     vcpu->arch.fault_dear,
1089                                                     vcpu->arch.fault_esr);
1090                         kvmppc_mmu_dtlb_miss(vcpu);
1091                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
1092                         r = RESUME_GUEST;
1093                         break;
1094                 }
1095
1096                 idx = srcu_read_lock(&vcpu->kvm->srcu);
1097
1098                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1099                 gfn = gpaddr >> PAGE_SHIFT;
1100
1101                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1102                         /* The guest TLB had a mapping, but the shadow TLB
1103                          * didn't, and it is RAM. This could be because:
1104                          * a) the entry is mapping the host kernel, or
1105                          * b) the guest used a large mapping which we're faking
1106                          * Either way, we need to satisfy the fault without
1107                          * invoking the guest. */
1108                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1109                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1110                         r = RESUME_GUEST;
1111                 } else {
1112                         /* Guest has mapped and accessed a page which is not
1113                          * actually RAM. */
1114                         vcpu->arch.paddr_accessed = gpaddr;
1115                         vcpu->arch.vaddr_accessed = eaddr;
1116                         r = kvmppc_emulate_mmio(run, vcpu);
1117                         kvmppc_account_exit(vcpu, MMIO_EXITS);
1118                 }
1119
1120                 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1121                 break;
1122         }
1123
1124         case BOOKE_INTERRUPT_ITLB_MISS: {
1125                 unsigned long eaddr = vcpu->arch.pc;
1126                 gpa_t gpaddr;
1127                 gfn_t gfn;
1128                 int gtlb_index;
1129
1130                 r = RESUME_GUEST;
1131
1132                 /* Check the guest TLB. */
1133                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1134                 if (gtlb_index < 0) {
1135                         /* The guest didn't have a mapping for it. */
1136                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
1137                         kvmppc_mmu_itlb_miss(vcpu);
1138                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
1139                         break;
1140                 }
1141
1142                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
1143
1144                 idx = srcu_read_lock(&vcpu->kvm->srcu);
1145
1146                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1147                 gfn = gpaddr >> PAGE_SHIFT;
1148
1149                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1150                         /* The guest TLB had a mapping, but the shadow TLB
1151                          * didn't. This could be because:
1152                          * a) the entry is mapping the host kernel, or
1153                          * b) the guest used a large mapping which we're faking
1154                          * Either way, we need to satisfy the fault without
1155                          * invoking the guest. */
1156                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1157                 } else {
1158                         /* Guest mapped and leaped at non-RAM! */
1159                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
1160                 }
1161
1162                 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1163                 break;
1164         }
1165
1166         case BOOKE_INTERRUPT_DEBUG: {
1167                 r = kvmppc_handle_debug(run, vcpu);
1168                 if (r == RESUME_HOST)
1169                         run->exit_reason = KVM_EXIT_DEBUG;
1170                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
1171                 break;
1172         }
1173
1174         default:
1175                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
1176                 BUG();
1177         }
1178
1179 out:
1180         /*
1181          * To avoid clobbering exit_reason, only check for signals if we
1182          * aren't already exiting to userspace for some other reason.
1183          */
1184         if (!(r & RESUME_HOST)) {
1185                 s = kvmppc_prepare_to_enter(vcpu);
1186                 if (s <= 0)
1187                         r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
1188                 else {
1189                         /* interrupts now hard-disabled */
1190                         kvmppc_fix_ee_before_entry();
1191                 }
1192         }
1193
1194         return r;
1195 }
1196
1197 static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr)
1198 {
1199         u32 old_tsr = vcpu->arch.tsr;
1200
1201         vcpu->arch.tsr = new_tsr;
1202
1203         if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS))
1204                 arm_next_watchdog(vcpu);
1205
1206         update_timer_ints(vcpu);
1207 }
1208
1209 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
1210 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1211 {
1212         int i;
1213         int r;
1214
1215         vcpu->arch.pc = 0;
1216         vcpu->arch.shared->pir = vcpu->vcpu_id;
1217         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
1218         kvmppc_set_msr(vcpu, 0);
1219
1220 #ifndef CONFIG_KVM_BOOKE_HV
1221         vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS;
1222         vcpu->arch.shadow_pid = 1;
1223         vcpu->arch.shared->msr = 0;
1224 #endif
1225
1226         /* Eye-catching numbers so we know if the guest takes an interrupt
1227          * before it's programmed its own IVPR/IVORs. */
1228         vcpu->arch.ivpr = 0x55550000;
1229         for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
1230                 vcpu->arch.ivor[i] = 0x7700 | i * 4;
1231
1232         kvmppc_init_timing_stats(vcpu);
1233
1234         r = kvmppc_core_vcpu_setup(vcpu);
1235         kvmppc_sanity_check(vcpu);
1236         return r;
1237 }
1238
1239 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
1240 {
1241         /* setup watchdog timer once */
1242         spin_lock_init(&vcpu->arch.wdt_lock);
1243         setup_timer(&vcpu->arch.wdt_timer, kvmppc_watchdog_func,
1244                     (unsigned long)vcpu);
1245
1246         return 0;
1247 }
1248
1249 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
1250 {
1251         del_timer_sync(&vcpu->arch.wdt_timer);
1252 }
1253
1254 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1255 {
1256         int i;
1257
1258         regs->pc = vcpu->arch.pc;
1259         regs->cr = kvmppc_get_cr(vcpu);
1260         regs->ctr = vcpu->arch.ctr;
1261         regs->lr = vcpu->arch.lr;
1262         regs->xer = kvmppc_get_xer(vcpu);
1263         regs->msr = vcpu->arch.shared->msr;
1264         regs->srr0 = kvmppc_get_srr0(vcpu);
1265         regs->srr1 = kvmppc_get_srr1(vcpu);
1266         regs->pid = vcpu->arch.pid;
1267         regs->sprg0 = kvmppc_get_sprg0(vcpu);
1268         regs->sprg1 = kvmppc_get_sprg1(vcpu);
1269         regs->sprg2 = kvmppc_get_sprg2(vcpu);
1270         regs->sprg3 = kvmppc_get_sprg3(vcpu);
1271         regs->sprg4 = kvmppc_get_sprg4(vcpu);
1272         regs->sprg5 = kvmppc_get_sprg5(vcpu);
1273         regs->sprg6 = kvmppc_get_sprg6(vcpu);
1274         regs->sprg7 = kvmppc_get_sprg7(vcpu);
1275
1276         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1277                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1278
1279         return 0;
1280 }
1281
1282 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1283 {
1284         int i;
1285
1286         vcpu->arch.pc = regs->pc;
1287         kvmppc_set_cr(vcpu, regs->cr);
1288         vcpu->arch.ctr = regs->ctr;
1289         vcpu->arch.lr = regs->lr;
1290         kvmppc_set_xer(vcpu, regs->xer);
1291         kvmppc_set_msr(vcpu, regs->msr);
1292         kvmppc_set_srr0(vcpu, regs->srr0);
1293         kvmppc_set_srr1(vcpu, regs->srr1);
1294         kvmppc_set_pid(vcpu, regs->pid);
1295         kvmppc_set_sprg0(vcpu, regs->sprg0);
1296         kvmppc_set_sprg1(vcpu, regs->sprg1);
1297         kvmppc_set_sprg2(vcpu, regs->sprg2);
1298         kvmppc_set_sprg3(vcpu, regs->sprg3);
1299         kvmppc_set_sprg4(vcpu, regs->sprg4);
1300         kvmppc_set_sprg5(vcpu, regs->sprg5);
1301         kvmppc_set_sprg6(vcpu, regs->sprg6);
1302         kvmppc_set_sprg7(vcpu, regs->sprg7);
1303
1304         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1305                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1306
1307         return 0;
1308 }
1309
1310 static void get_sregs_base(struct kvm_vcpu *vcpu,
1311                            struct kvm_sregs *sregs)
1312 {
1313         u64 tb = get_tb();
1314
1315         sregs->u.e.features |= KVM_SREGS_E_BASE;
1316
1317         sregs->u.e.csrr0 = vcpu->arch.csrr0;
1318         sregs->u.e.csrr1 = vcpu->arch.csrr1;
1319         sregs->u.e.mcsr = vcpu->arch.mcsr;
1320         sregs->u.e.esr = kvmppc_get_esr(vcpu);
1321         sregs->u.e.dear = kvmppc_get_dar(vcpu);
1322         sregs->u.e.tsr = vcpu->arch.tsr;
1323         sregs->u.e.tcr = vcpu->arch.tcr;
1324         sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1325         sregs->u.e.tb = tb;
1326         sregs->u.e.vrsave = vcpu->arch.vrsave;
1327 }
1328
1329 static int set_sregs_base(struct kvm_vcpu *vcpu,
1330                           struct kvm_sregs *sregs)
1331 {
1332         if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1333                 return 0;
1334
1335         vcpu->arch.csrr0 = sregs->u.e.csrr0;
1336         vcpu->arch.csrr1 = sregs->u.e.csrr1;
1337         vcpu->arch.mcsr = sregs->u.e.mcsr;
1338         kvmppc_set_esr(vcpu, sregs->u.e.esr);
1339         kvmppc_set_dar(vcpu, sregs->u.e.dear);
1340         vcpu->arch.vrsave = sregs->u.e.vrsave;
1341         kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1342
1343         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1344                 vcpu->arch.dec = sregs->u.e.dec;
1345                 kvmppc_emulate_dec(vcpu);
1346         }
1347
1348         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR)
1349                 kvmppc_set_tsr(vcpu, sregs->u.e.tsr);
1350
1351         return 0;
1352 }
1353
1354 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1355                               struct kvm_sregs *sregs)
1356 {
1357         sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1358
1359         sregs->u.e.pir = vcpu->vcpu_id;
1360         sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1361         sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1362         sregs->u.e.decar = vcpu->arch.decar;
1363         sregs->u.e.ivpr = vcpu->arch.ivpr;
1364 }
1365
1366 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1367                              struct kvm_sregs *sregs)
1368 {
1369         if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1370                 return 0;
1371
1372         if (sregs->u.e.pir != vcpu->vcpu_id)
1373                 return -EINVAL;
1374
1375         vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1376         vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1377         vcpu->arch.decar = sregs->u.e.decar;
1378         vcpu->arch.ivpr = sregs->u.e.ivpr;
1379
1380         return 0;
1381 }
1382
1383 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1384 {
1385         sregs->u.e.features |= KVM_SREGS_E_IVOR;
1386
1387         sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1388         sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1389         sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1390         sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1391         sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1392         sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1393         sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1394         sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1395         sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1396         sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1397         sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1398         sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1399         sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1400         sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1401         sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1402         sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1403         return 0;
1404 }
1405
1406 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1407 {
1408         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1409                 return 0;
1410
1411         vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1412         vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1413         vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1414         vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1415         vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1416         vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1417         vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1418         vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1419         vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1420         vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1421         vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1422         vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1423         vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1424         vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1425         vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1426         vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1427
1428         return 0;
1429 }
1430
1431 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1432                                   struct kvm_sregs *sregs)
1433 {
1434         sregs->pvr = vcpu->arch.pvr;
1435
1436         get_sregs_base(vcpu, sregs);
1437         get_sregs_arch206(vcpu, sregs);
1438         return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
1439 }
1440
1441 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1442                                   struct kvm_sregs *sregs)
1443 {
1444         int ret;
1445
1446         if (vcpu->arch.pvr != sregs->pvr)
1447                 return -EINVAL;
1448
1449         ret = set_sregs_base(vcpu, sregs);
1450         if (ret < 0)
1451                 return ret;
1452
1453         ret = set_sregs_arch206(vcpu, sregs);
1454         if (ret < 0)
1455                 return ret;
1456
1457         return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
1458 }
1459
1460 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1461 {
1462         int r = 0;
1463         union kvmppc_one_reg val;
1464         int size;
1465
1466         size = one_reg_size(reg->id);
1467         if (size > sizeof(val))
1468                 return -EINVAL;
1469
1470         switch (reg->id) {
1471         case KVM_REG_PPC_IAC1:
1472                 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.iac1);
1473                 break;
1474         case KVM_REG_PPC_IAC2:
1475                 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.iac2);
1476                 break;
1477 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1478         case KVM_REG_PPC_IAC3:
1479                 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.iac3);
1480                 break;
1481         case KVM_REG_PPC_IAC4:
1482                 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.iac4);
1483                 break;
1484 #endif
1485         case KVM_REG_PPC_DAC1:
1486                 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.dac1);
1487                 break;
1488         case KVM_REG_PPC_DAC2:
1489                 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.dac2);
1490                 break;
1491         case KVM_REG_PPC_EPR: {
1492                 u32 epr = kvmppc_get_epr(vcpu);
1493                 val = get_reg_val(reg->id, epr);
1494                 break;
1495         }
1496 #if defined(CONFIG_64BIT)
1497         case KVM_REG_PPC_EPCR:
1498                 val = get_reg_val(reg->id, vcpu->arch.epcr);
1499                 break;
1500 #endif
1501         case KVM_REG_PPC_TCR:
1502                 val = get_reg_val(reg->id, vcpu->arch.tcr);
1503                 break;
1504         case KVM_REG_PPC_TSR:
1505                 val = get_reg_val(reg->id, vcpu->arch.tsr);
1506                 break;
1507         case KVM_REG_PPC_DEBUG_INST:
1508                 val = get_reg_val(reg->id, KVMPPC_INST_EHPRIV_DEBUG);
1509                 break;
1510         case KVM_REG_PPC_VRSAVE:
1511                 val = get_reg_val(reg->id, vcpu->arch.vrsave);
1512                 break;
1513         default:
1514                 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, reg->id, &val);
1515                 break;
1516         }
1517
1518         if (r)
1519                 return r;
1520
1521         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1522                 r = -EFAULT;
1523
1524         return r;
1525 }
1526
1527 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1528 {
1529         int r = 0;
1530         union kvmppc_one_reg val;
1531         int size;
1532
1533         size = one_reg_size(reg->id);
1534         if (size > sizeof(val))
1535                 return -EINVAL;
1536
1537         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1538                 return -EFAULT;
1539
1540         switch (reg->id) {
1541         case KVM_REG_PPC_IAC1:
1542                 vcpu->arch.dbg_reg.iac1 = set_reg_val(reg->id, val);
1543                 break;
1544         case KVM_REG_PPC_IAC2:
1545                 vcpu->arch.dbg_reg.iac2 = set_reg_val(reg->id, val);
1546                 break;
1547 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1548         case KVM_REG_PPC_IAC3:
1549                 vcpu->arch.dbg_reg.iac3 = set_reg_val(reg->id, val);
1550                 break;
1551         case KVM_REG_PPC_IAC4:
1552                 vcpu->arch.dbg_reg.iac4 = set_reg_val(reg->id, val);
1553                 break;
1554 #endif
1555         case KVM_REG_PPC_DAC1:
1556                 vcpu->arch.dbg_reg.dac1 = set_reg_val(reg->id, val);
1557                 break;
1558         case KVM_REG_PPC_DAC2:
1559                 vcpu->arch.dbg_reg.dac2 = set_reg_val(reg->id, val);
1560                 break;
1561         case KVM_REG_PPC_EPR: {
1562                 u32 new_epr = set_reg_val(reg->id, val);
1563                 kvmppc_set_epr(vcpu, new_epr);
1564                 break;
1565         }
1566 #if defined(CONFIG_64BIT)
1567         case KVM_REG_PPC_EPCR: {
1568                 u32 new_epcr = set_reg_val(reg->id, val);
1569                 kvmppc_set_epcr(vcpu, new_epcr);
1570                 break;
1571         }
1572 #endif
1573         case KVM_REG_PPC_OR_TSR: {
1574                 u32 tsr_bits = set_reg_val(reg->id, val);
1575                 kvmppc_set_tsr_bits(vcpu, tsr_bits);
1576                 break;
1577         }
1578         case KVM_REG_PPC_CLEAR_TSR: {
1579                 u32 tsr_bits = set_reg_val(reg->id, val);
1580                 kvmppc_clr_tsr_bits(vcpu, tsr_bits);
1581                 break;
1582         }
1583         case KVM_REG_PPC_TSR: {
1584                 u32 tsr = set_reg_val(reg->id, val);
1585                 kvmppc_set_tsr(vcpu, tsr);
1586                 break;
1587         }
1588         case KVM_REG_PPC_TCR: {
1589                 u32 tcr = set_reg_val(reg->id, val);
1590                 kvmppc_set_tcr(vcpu, tcr);
1591                 break;
1592         }
1593         case KVM_REG_PPC_VRSAVE:
1594                 vcpu->arch.vrsave = set_reg_val(reg->id, val);
1595                 break;
1596         default:
1597                 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, reg->id, &val);
1598                 break;
1599         }
1600
1601         return r;
1602 }
1603
1604 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1605 {
1606         return -ENOTSUPP;
1607 }
1608
1609 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1610 {
1611         return -ENOTSUPP;
1612 }
1613
1614 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1615                                   struct kvm_translation *tr)
1616 {
1617         int r;
1618
1619         r = kvmppc_core_vcpu_translate(vcpu, tr);
1620         return r;
1621 }
1622
1623 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1624 {
1625         return -ENOTSUPP;
1626 }
1627
1628 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
1629                               struct kvm_memory_slot *dont)
1630 {
1631 }
1632
1633 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
1634                                unsigned long npages)
1635 {
1636         return 0;
1637 }
1638
1639 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1640                                       struct kvm_memory_slot *memslot,
1641                                       struct kvm_userspace_memory_region *mem)
1642 {
1643         return 0;
1644 }
1645
1646 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1647                                 struct kvm_userspace_memory_region *mem,
1648                                 const struct kvm_memory_slot *old)
1649 {
1650 }
1651
1652 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
1653 {
1654 }
1655
1656 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr)
1657 {
1658 #if defined(CONFIG_64BIT)
1659         vcpu->arch.epcr = new_epcr;
1660 #ifdef CONFIG_KVM_BOOKE_HV
1661         vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM;
1662         if (vcpu->arch.epcr  & SPRN_EPCR_ICM)
1663                 vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM;
1664 #endif
1665 #endif
1666 }
1667
1668 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1669 {
1670         vcpu->arch.tcr = new_tcr;
1671         arm_next_watchdog(vcpu);
1672         update_timer_ints(vcpu);
1673 }
1674
1675 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1676 {
1677         set_bits(tsr_bits, &vcpu->arch.tsr);
1678         smp_wmb();
1679         kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1680         kvm_vcpu_kick(vcpu);
1681 }
1682
1683 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1684 {
1685         clear_bits(tsr_bits, &vcpu->arch.tsr);
1686
1687         /*
1688          * We may have stopped the watchdog due to
1689          * being stuck on final expiration.
1690          */
1691         if (tsr_bits & (TSR_ENW | TSR_WIS))
1692                 arm_next_watchdog(vcpu);
1693
1694         update_timer_ints(vcpu);
1695 }
1696
1697 void kvmppc_decrementer_func(unsigned long data)
1698 {
1699         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
1700
1701         if (vcpu->arch.tcr & TCR_ARE) {
1702                 vcpu->arch.dec = vcpu->arch.decar;
1703                 kvmppc_emulate_dec(vcpu);
1704         }
1705
1706         kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1707 }
1708
1709 static int kvmppc_booke_add_breakpoint(struct debug_reg *dbg_reg,
1710                                        uint64_t addr, int index)
1711 {
1712         switch (index) {
1713         case 0:
1714                 dbg_reg->dbcr0 |= DBCR0_IAC1;
1715                 dbg_reg->iac1 = addr;
1716                 break;
1717         case 1:
1718                 dbg_reg->dbcr0 |= DBCR0_IAC2;
1719                 dbg_reg->iac2 = addr;
1720                 break;
1721 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1722         case 2:
1723                 dbg_reg->dbcr0 |= DBCR0_IAC3;
1724                 dbg_reg->iac3 = addr;
1725                 break;
1726         case 3:
1727                 dbg_reg->dbcr0 |= DBCR0_IAC4;
1728                 dbg_reg->iac4 = addr;
1729                 break;
1730 #endif
1731         default:
1732                 return -EINVAL;
1733         }
1734
1735         dbg_reg->dbcr0 |= DBCR0_IDM;
1736         return 0;
1737 }
1738
1739 static int kvmppc_booke_add_watchpoint(struct debug_reg *dbg_reg, uint64_t addr,
1740                                        int type, int index)
1741 {
1742         switch (index) {
1743         case 0:
1744                 if (type & KVMPPC_DEBUG_WATCH_READ)
1745                         dbg_reg->dbcr0 |= DBCR0_DAC1R;
1746                 if (type & KVMPPC_DEBUG_WATCH_WRITE)
1747                         dbg_reg->dbcr0 |= DBCR0_DAC1W;
1748                 dbg_reg->dac1 = addr;
1749                 break;
1750         case 1:
1751                 if (type & KVMPPC_DEBUG_WATCH_READ)
1752                         dbg_reg->dbcr0 |= DBCR0_DAC2R;
1753                 if (type & KVMPPC_DEBUG_WATCH_WRITE)
1754                         dbg_reg->dbcr0 |= DBCR0_DAC2W;
1755                 dbg_reg->dac2 = addr;
1756                 break;
1757         default:
1758                 return -EINVAL;
1759         }
1760
1761         dbg_reg->dbcr0 |= DBCR0_IDM;
1762         return 0;
1763 }
1764 void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set)
1765 {
1766         /* XXX: Add similar MSR protection for BookE-PR */
1767 #ifdef CONFIG_KVM_BOOKE_HV
1768         BUG_ON(prot_bitmap & ~(MSRP_UCLEP | MSRP_DEP | MSRP_PMMP));
1769         if (set) {
1770                 if (prot_bitmap & MSR_UCLE)
1771                         vcpu->arch.shadow_msrp |= MSRP_UCLEP;
1772                 if (prot_bitmap & MSR_DE)
1773                         vcpu->arch.shadow_msrp |= MSRP_DEP;
1774                 if (prot_bitmap & MSR_PMM)
1775                         vcpu->arch.shadow_msrp |= MSRP_PMMP;
1776         } else {
1777                 if (prot_bitmap & MSR_UCLE)
1778                         vcpu->arch.shadow_msrp &= ~MSRP_UCLEP;
1779                 if (prot_bitmap & MSR_DE)
1780                         vcpu->arch.shadow_msrp &= ~MSRP_DEP;
1781                 if (prot_bitmap & MSR_PMM)
1782                         vcpu->arch.shadow_msrp &= ~MSRP_PMMP;
1783         }
1784 #endif
1785 }
1786
1787 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
1788                  enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
1789 {
1790         int gtlb_index;
1791         gpa_t gpaddr;
1792
1793 #ifdef CONFIG_KVM_E500V2
1794         if (!(vcpu->arch.shared->msr & MSR_PR) &&
1795             (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1796                 pte->eaddr = eaddr;
1797                 pte->raddr = (vcpu->arch.magic_page_pa & PAGE_MASK) |
1798                              (eaddr & ~PAGE_MASK);
1799                 pte->vpage = eaddr >> PAGE_SHIFT;
1800                 pte->may_read = true;
1801                 pte->may_write = true;
1802                 pte->may_execute = true;
1803
1804                 return 0;
1805         }
1806 #endif
1807
1808         /* Check the guest TLB. */
1809         switch (xlid) {
1810         case XLATE_INST:
1811                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1812                 break;
1813         case XLATE_DATA:
1814                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1815                 break;
1816         default:
1817                 BUG();
1818         }
1819
1820         /* Do we have a TLB entry at all? */
1821         if (gtlb_index < 0)
1822                 return -ENOENT;
1823
1824         gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1825
1826         pte->eaddr = eaddr;
1827         pte->raddr = (gpaddr & PAGE_MASK) | (eaddr & ~PAGE_MASK);
1828         pte->vpage = eaddr >> PAGE_SHIFT;
1829
1830         /* XXX read permissions from the guest TLB */
1831         pte->may_read = true;
1832         pte->may_write = true;
1833         pte->may_execute = true;
1834
1835         return 0;
1836 }
1837
1838 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1839                                          struct kvm_guest_debug *dbg)
1840 {
1841         struct debug_reg *dbg_reg;
1842         int n, b = 0, w = 0;
1843
1844         if (!(dbg->control & KVM_GUESTDBG_ENABLE)) {
1845                 vcpu->arch.shadow_dbg_reg.dbcr0 = 0;
1846                 vcpu->guest_debug = 0;
1847                 kvm_guest_protect_msr(vcpu, MSR_DE, false);
1848                 return 0;
1849         }
1850
1851         kvm_guest_protect_msr(vcpu, MSR_DE, true);
1852         vcpu->guest_debug = dbg->control;
1853         vcpu->arch.shadow_dbg_reg.dbcr0 = 0;
1854         /* Set DBCR0_EDM in guest visible DBCR0 register. */
1855         vcpu->arch.dbg_reg.dbcr0 = DBCR0_EDM;
1856
1857         if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
1858                 vcpu->arch.shadow_dbg_reg.dbcr0 |= DBCR0_IDM | DBCR0_IC;
1859
1860         /* Code below handles only HW breakpoints */
1861         dbg_reg = &(vcpu->arch.shadow_dbg_reg);
1862
1863 #ifdef CONFIG_KVM_BOOKE_HV
1864         /*
1865          * On BookE-HV (e500mc) the guest is always executed with MSR.GS=1
1866          * DBCR1 and DBCR2 are set to trigger debug events when MSR.PR is 0
1867          */
1868         dbg_reg->dbcr1 = 0;
1869         dbg_reg->dbcr2 = 0;
1870 #else
1871         /*
1872          * On BookE-PR (e500v2) the guest is always executed with MSR.PR=1
1873          * We set DBCR1 and DBCR2 to only trigger debug events when MSR.PR
1874          * is set.
1875          */
1876         dbg_reg->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US | DBCR1_IAC3US |
1877                           DBCR1_IAC4US;
1878         dbg_reg->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US;
1879 #endif
1880
1881         if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
1882                 return 0;
1883
1884         for (n = 0; n < (KVMPPC_BOOKE_IAC_NUM + KVMPPC_BOOKE_DAC_NUM); n++) {
1885                 uint64_t addr = dbg->arch.bp[n].addr;
1886                 uint32_t type = dbg->arch.bp[n].type;
1887
1888                 if (type == KVMPPC_DEBUG_NONE)
1889                         continue;
1890
1891                 if (type & !(KVMPPC_DEBUG_WATCH_READ |
1892                              KVMPPC_DEBUG_WATCH_WRITE |
1893                              KVMPPC_DEBUG_BREAKPOINT))
1894                         return -EINVAL;
1895
1896                 if (type & KVMPPC_DEBUG_BREAKPOINT) {
1897                         /* Setting H/W breakpoint */
1898                         if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++))
1899                                 return -EINVAL;
1900                 } else {
1901                         /* Setting H/W watchpoint */
1902                         if (kvmppc_booke_add_watchpoint(dbg_reg, addr,
1903                                                         type, w++))
1904                                 return -EINVAL;
1905                 }
1906         }
1907
1908         return 0;
1909 }
1910
1911 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1912 {
1913         vcpu->cpu = smp_processor_id();
1914         current->thread.kvm_vcpu = vcpu;
1915 }
1916
1917 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
1918 {
1919         current->thread.kvm_vcpu = NULL;
1920         vcpu->cpu = -1;
1921
1922         /* Clear pending debug event in DBSR */
1923         kvmppc_clear_dbsr();
1924 }
1925
1926 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
1927 {
1928         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
1929 }
1930
1931 int kvmppc_core_init_vm(struct kvm *kvm)
1932 {
1933         return kvm->arch.kvm_ops->init_vm(kvm);
1934 }
1935
1936 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
1937 {
1938         return kvm->arch.kvm_ops->vcpu_create(kvm, id);
1939 }
1940
1941 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
1942 {
1943         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
1944 }
1945
1946 void kvmppc_core_destroy_vm(struct kvm *kvm)
1947 {
1948         kvm->arch.kvm_ops->destroy_vm(kvm);
1949 }
1950
1951 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1952 {
1953         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
1954 }
1955
1956 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
1957 {
1958         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
1959 }
1960
1961 int __init kvmppc_booke_init(void)
1962 {
1963 #ifndef CONFIG_KVM_BOOKE_HV
1964         unsigned long ivor[16];
1965         unsigned long *handler = kvmppc_booke_handler_addr;
1966         unsigned long max_ivor = 0;
1967         unsigned long handler_len;
1968         int i;
1969
1970         /* We install our own exception handlers by hijacking IVPR. IVPR must
1971          * be 16-bit aligned, so we need a 64KB allocation. */
1972         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
1973                                                  VCPU_SIZE_ORDER);
1974         if (!kvmppc_booke_handlers)
1975                 return -ENOMEM;
1976
1977         /* XXX make sure our handlers are smaller than Linux's */
1978
1979         /* Copy our interrupt handlers to match host IVORs. That way we don't
1980          * have to swap the IVORs on every guest/host transition. */
1981         ivor[0] = mfspr(SPRN_IVOR0);
1982         ivor[1] = mfspr(SPRN_IVOR1);
1983         ivor[2] = mfspr(SPRN_IVOR2);
1984         ivor[3] = mfspr(SPRN_IVOR3);
1985         ivor[4] = mfspr(SPRN_IVOR4);
1986         ivor[5] = mfspr(SPRN_IVOR5);
1987         ivor[6] = mfspr(SPRN_IVOR6);
1988         ivor[7] = mfspr(SPRN_IVOR7);
1989         ivor[8] = mfspr(SPRN_IVOR8);
1990         ivor[9] = mfspr(SPRN_IVOR9);
1991         ivor[10] = mfspr(SPRN_IVOR10);
1992         ivor[11] = mfspr(SPRN_IVOR11);
1993         ivor[12] = mfspr(SPRN_IVOR12);
1994         ivor[13] = mfspr(SPRN_IVOR13);
1995         ivor[14] = mfspr(SPRN_IVOR14);
1996         ivor[15] = mfspr(SPRN_IVOR15);
1997
1998         for (i = 0; i < 16; i++) {
1999                 if (ivor[i] > max_ivor)
2000                         max_ivor = i;
2001
2002                 handler_len = handler[i + 1] - handler[i];
2003                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
2004                        (void *)handler[i], handler_len);
2005         }
2006
2007         handler_len = handler[max_ivor + 1] - handler[max_ivor];
2008         flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers +
2009                            ivor[max_ivor] + handler_len);
2010 #endif /* !BOOKE_HV */
2011         return 0;
2012 }
2013
2014 void __exit kvmppc_booke_exit(void)
2015 {
2016         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
2017         kvm_exit();
2018 }