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 <[email protected]>
  19  *          Christian Ehrhardt <[email protected]>
  20  *          Scott Wood <[email protected]>
  21  *          Varun Sethi <[email protected]>
  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 <linux/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_successful_poll", VCPU_STAT(halt_successful_poll) },
  66         { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
  67         { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
  68         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  69         { "doorbell", VCPU_STAT(dbell_exits) },
  70         { "guest doorbell", VCPU_STAT(gdbell_exits) },
  71         { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
  72         { NULL }
  73 };
  74
  75 /* TODO: use vcpu_printf() */
  76 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
  77 {
  78         int i;
  79
  80         printk("pc:   %08lx msr:  %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
  81         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
  82         printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
  83                                             vcpu->arch.shared->srr1);
  84
  85         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  86
  87         for (i = 0; i < 32; i += 4) {
  88                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  89                        kvmppc_get_gpr(vcpu, i),
  90                        kvmppc_get_gpr(vcpu, i+1),
  91                        kvmppc_get_gpr(vcpu, i+2),
  92                        kvmppc_get_gpr(vcpu, i+3));
  93         }
  94 }
  95
  96 #ifdef CONFIG_SPE
  97 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
  98 {
  99         preempt_disable();
 100         enable_kernel_spe();
 101         kvmppc_save_guest_spe(vcpu);
 102         disable_kernel_spe();
 103         vcpu->arch.shadow_msr &= ~MSR_SPE;
 104         preempt_enable();
 105 }
 106
 107 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
 108 {
 109         preempt_disable();
 110         enable_kernel_spe();
 111         kvmppc_load_guest_spe(vcpu);
 112         disable_kernel_spe();
 113         vcpu->arch.shadow_msr |= MSR_SPE;
 114         preempt_enable();
 115 }
 116
 117 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 118 {
 119         if (vcpu->arch.shared->msr & MSR_SPE) {
 120                 if (!(vcpu->arch.shadow_msr & MSR_SPE))
 121                         kvmppc_vcpu_enable_spe(vcpu);
 122         } else if (vcpu->arch.shadow_msr & MSR_SPE) {
 123                 kvmppc_vcpu_disable_spe(vcpu);
 124         }
 125 }
 126 #else
 127 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 128 {
 129 }
 130 #endif
 131
 132 /*
 133  * Load up guest vcpu FP state if it's needed.
 134  * It also set the MSR_FP in thread so that host know
 135  * we're holding FPU, and then host can help to save
 136  * guest vcpu FP state if other threads require to use FPU.
 137  * This simulates an FP unavailable fault.
 138  *
 139  * It requires to be called with preemption disabled.
 140  */
 141 static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
 142 {
 143 #ifdef CONFIG_PPC_FPU
 144         if (!(current->thread.regs->msr & MSR_FP)) {
 145                 enable_kernel_fp();
 146                 load_fp_state(&vcpu->arch.fp);
 147                 disable_kernel_fp();
 148                 current->thread.fp_save_area = &vcpu->arch.fp;
 149                 current->thread.regs->msr |= MSR_FP;
 150         }
 151 #endif
 152 }
 153
 154 /*
 155  * Save guest vcpu FP state into thread.
 156  * It requires to be called with preemption disabled.
 157  */
 158 static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
 159 {
 160 #ifdef CONFIG_PPC_FPU
 161         if (current->thread.regs->msr & MSR_FP)
 162                 giveup_fpu(current);
 163         current->thread.fp_save_area = NULL;
 164 #endif
 165 }
 166
 167 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
 168 {
 169 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV)
 170         /* We always treat the FP bit as enabled from the host
 171            perspective, so only need to adjust the shadow MSR */
 172         vcpu->arch.shadow_msr &= ~MSR_FP;
 173         vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP;
 174 #endif
 175 }
 176
 177 /*
 178  * Simulate AltiVec unavailable fault to load guest state
 179  * from thread to AltiVec unit.
 180  * It requires to be called with preemption disabled.
 181  */
 182 static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu)
 183 {
 184 #ifdef CONFIG_ALTIVEC
 185         if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
 186                 if (!(current->thread.regs->msr & MSR_VEC)) {
 187                         enable_kernel_altivec();
 188                         load_vr_state(&vcpu->arch.vr);
 189                         disable_kernel_altivec();
 190                         current->thread.vr_save_area = &vcpu->arch.vr;
 191                         current->thread.regs->msr |= MSR_VEC;
 192                 }
 193         }
 194 #endif
 195 }
 196
 197 /*
 198  * Save guest vcpu AltiVec state into thread.
 199  * It requires to be called with preemption disabled.
 200  */
 201 static inline void kvmppc_save_guest_altivec(struct kvm_vcpu *vcpu)
 202 {
 203 #ifdef CONFIG_ALTIVEC
 204         if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
 205                 if (current->thread.regs->msr & MSR_VEC)
 206                         giveup_altivec(current);
 207                 current->thread.vr_save_area = NULL;
 208         }
 209 #endif
 210 }
 211
 212 static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu)
 213 {
 214         /* Synchronize guest's desire to get debug interrupts into shadow MSR */
 215 #ifndef CONFIG_KVM_BOOKE_HV
 216         vcpu->arch.shadow_msr &= ~MSR_DE;
 217         vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_DE;
 218 #endif
 219
 220         /* Force enable debug interrupts when user space wants to debug */
 221         if (vcpu->guest_debug) {
 222 #ifdef CONFIG_KVM_BOOKE_HV
 223                 /*
 224                  * Since there is no shadow MSR, sync MSR_DE into the guest
 225                  * visible MSR.
 226                  */
 227                 vcpu->arch.shared->msr |= MSR_DE;
 228 #else
 229                 vcpu->arch.shadow_msr |= MSR_DE;
 230                 vcpu->arch.shared->msr &= ~MSR_DE;
 231 #endif
 232         }
 233 }
 234
 235 /*
 236  * Helper function for "full" MSR writes.  No need to call this if only
 237  * EE/CE/ME/DE/RI are changing.
 238  */
 239 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
 240 {
 241         u32 old_msr = vcpu->arch.shared->msr;
 242
 243 #ifdef CONFIG_KVM_BOOKE_HV
 244         new_msr |= MSR_GS;
 245 #endif
 246
 247         vcpu->arch.shared->msr = new_msr;
 248
 249         kvmppc_mmu_msr_notify(vcpu, old_msr);
 250         kvmppc_vcpu_sync_spe(vcpu);
 251         kvmppc_vcpu_sync_fpu(vcpu);
 252         kvmppc_vcpu_sync_debug(vcpu);
 253 }
 254
 255 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
 256                                        unsigned int priority)
 257 {
 258         trace_kvm_booke_queue_irqprio(vcpu, priority);
 259         set_bit(priority, &vcpu->arch.pending_exceptions);
 260 }
 261
 262 void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
 263                                  ulong dear_flags, ulong esr_flags)
 264 {
 265         vcpu->arch.queued_dear = dear_flags;
 266         vcpu->arch.queued_esr = esr_flags;
 267         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
 268 }
 269
 270 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
 271                                     ulong dear_flags, ulong esr_flags)
 272 {
 273         vcpu->arch.queued_dear = dear_flags;
 274         vcpu->arch.queued_esr = esr_flags;
 275         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 276 }
 277
 278 void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu)
 279 {
 280         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 281 }
 282
 283 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong esr_flags)
 284 {
 285         vcpu->arch.queued_esr = esr_flags;
 286         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 287 }
 288
 289 static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags,
 290                                         ulong esr_flags)
 291 {
 292         vcpu->arch.queued_dear = dear_flags;
 293         vcpu->arch.queued_esr = esr_flags;
 294         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT);
 295 }
 296
 297 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
 298 {
 299         vcpu->arch.queued_esr = esr_flags;
 300         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 301 }
 302
 303 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 304 {
 305         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
 306 }
 307
 308 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 309 {
 310         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 311 }
 312
 313 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 314 {
 315         clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 316 }
 317
 318 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 319                                 struct kvm_interrupt *irq)
 320 {
 321         unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
 322
 323         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 324                 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
 325
 326         kvmppc_booke_queue_irqprio(vcpu, prio);
 327 }
 328
 329 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 330 {
 331         clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
 332         clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
 333 }
 334
 335 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu)
 336 {
 337         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG);
 338 }
 339
 340 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu)
 341 {
 342         clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions);
 343 }
 344
 345 void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu)
 346 {
 347         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG);
 348 }
 349
 350 void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu)
 351 {
 352         clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions);
 353 }
 354
 355 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 356 {
 357         kvmppc_set_srr0(vcpu, srr0);
 358         kvmppc_set_srr1(vcpu, srr1);
 359 }
 360
 361 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 362 {
 363         vcpu->arch.csrr0 = srr0;
 364         vcpu->arch.csrr1 = srr1;
 365 }
 366
 367 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 368 {
 369         if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
 370                 vcpu->arch.dsrr0 = srr0;
 371                 vcpu->arch.dsrr1 = srr1;
 372         } else {
 373                 set_guest_csrr(vcpu, srr0, srr1);
 374         }
 375 }
 376
 377 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 378 {
 379         vcpu->arch.mcsrr0 = srr0;
 380         vcpu->arch.mcsrr1 = srr1;
 381 }
 382
 383 /* Deliver the interrupt of the corresponding priority, if possible. */
 384 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 385                                         unsigned int priority)
 386 {
 387         int allowed = 0;
 388         ulong msr_mask = 0;
 389         bool update_esr = false, update_dear = false, update_epr = false;
 390         ulong crit_raw = vcpu->arch.shared->critical;
 391         ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
 392         bool crit;
 393         bool keep_irq = false;
 394         enum int_class int_class;
 395         ulong new_msr = vcpu->arch.shared->msr;
 396
 397         /* Truncate crit indicators in 32 bit mode */
 398         if (!(vcpu->arch.shared->msr & MSR_SF)) {
 399                 crit_raw &= 0xffffffff;
 400                 crit_r1 &= 0xffffffff;
 401         }
 402
 403         /* Critical section when crit == r1 */
 404         crit = (crit_raw == crit_r1);
 405         /* ... and we're in supervisor mode */
 406         crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 407
 408         if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
 409                 priority = BOOKE_IRQPRIO_EXTERNAL;
 410                 keep_irq = true;
 411         }
 412
 413         if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags)
 414                 update_epr = true;
 415
 416         switch (priority) {
 417         case BOOKE_IRQPRIO_DTLB_MISS:
 418         case BOOKE_IRQPRIO_DATA_STORAGE:
 419         case BOOKE_IRQPRIO_ALIGNMENT:
 420                 update_dear = true;
 421                 /* fall through */
 422         case BOOKE_IRQPRIO_INST_STORAGE:
 423         case BOOKE_IRQPRIO_PROGRAM:
 424                 update_esr = true;
 425                 /* fall through */
 426         case BOOKE_IRQPRIO_ITLB_MISS:
 427         case BOOKE_IRQPRIO_SYSCALL:
 428         case BOOKE_IRQPRIO_FP_UNAVAIL:
 429 #ifdef CONFIG_SPE_POSSIBLE
 430         case BOOKE_IRQPRIO_SPE_UNAVAIL:
 431         case BOOKE_IRQPRIO_SPE_FP_DATA:
 432         case BOOKE_IRQPRIO_SPE_FP_ROUND:
 433 #endif
 434 #ifdef CONFIG_ALTIVEC
 435         case BOOKE_IRQPRIO_ALTIVEC_UNAVAIL:
 436         case BOOKE_IRQPRIO_ALTIVEC_ASSIST:
 437 #endif
 438         case BOOKE_IRQPRIO_AP_UNAVAIL:
 439                 allowed = 1;
 440                 msr_mask = MSR_CE | MSR_ME | MSR_DE;
 441                 int_class = INT_CLASS_NONCRIT;
 442                 break;
 443         case BOOKE_IRQPRIO_WATCHDOG:
 444         case BOOKE_IRQPRIO_CRITICAL:
 445         case BOOKE_IRQPRIO_DBELL_CRIT:
 446                 allowed = vcpu->arch.shared->msr & MSR_CE;
 447                 allowed = allowed && !crit;
 448                 msr_mask = MSR_ME;
 449                 int_class = INT_CLASS_CRIT;
 450                 break;
 451         case BOOKE_IRQPRIO_MACHINE_CHECK:
 452                 allowed = vcpu->arch.shared->msr & MSR_ME;
 453                 allowed = allowed && !crit;
 454                 int_class = INT_CLASS_MC;
 455                 break;
 456         case BOOKE_IRQPRIO_DECREMENTER:
 457         case BOOKE_IRQPRIO_FIT:
 458                 keep_irq = true;
 459                 /* fall through */
 460         case BOOKE_IRQPRIO_EXTERNAL:
 461         case BOOKE_IRQPRIO_DBELL:
 462                 allowed = vcpu->arch.shared->msr & MSR_EE;
 463                 allowed = allowed && !crit;
 464                 msr_mask = MSR_CE | MSR_ME | MSR_DE;
 465                 int_class = INT_CLASS_NONCRIT;
 466                 break;
 467         case BOOKE_IRQPRIO_DEBUG:
 468                 allowed = vcpu->arch.shared->msr & MSR_DE;
 469                 allowed = allowed && !crit;
 470                 msr_mask = MSR_ME;
 471                 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC))
 472                         int_class = INT_CLASS_DBG;
 473                 else
 474                         int_class = INT_CLASS_CRIT;
 475
 476                 break;
 477         }
 478
 479         if (allowed) {
 480                 switch (int_class) {
 481                 case INT_CLASS_NONCRIT:
 482                         set_guest_srr(vcpu, vcpu->arch.pc,
 483                                       vcpu->arch.shared->msr);
 484                         break;
 485                 case INT_CLASS_CRIT:
 486                         set_guest_csrr(vcpu, vcpu->arch.pc,
 487                                        vcpu->arch.shared->msr);
 488                         break;
 489                 case INT_CLASS_DBG:
 490                         set_guest_dsrr(vcpu, vcpu->arch.pc,
 491                                        vcpu->arch.shared->msr);
 492                         break;
 493                 case INT_CLASS_MC:
 494                         set_guest_mcsrr(vcpu, vcpu->arch.pc,
 495                                         vcpu->arch.shared->msr);
 496                         break;
 497                 }
 498
 499                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 500                 if (update_esr == true)
 501                         kvmppc_set_esr(vcpu, vcpu->arch.queued_esr);
 502                 if (update_dear == true)
 503                         kvmppc_set_dar(vcpu, vcpu->arch.queued_dear);
 504                 if (update_epr == true) {
 505                         if (vcpu->arch.epr_flags & KVMPPC_EPR_USER)
 506                                 kvm_make_request(KVM_REQ_EPR_EXIT, vcpu);
 507                         else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) {
 508                                 BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC);
 509                                 kvmppc_mpic_set_epr(vcpu);
 510                         }
 511                 }
 512
 513                 new_msr &= msr_mask;
 514 #if defined(CONFIG_64BIT)
 515                 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
 516                         new_msr |= MSR_CM;
 517 #endif
 518                 kvmppc_set_msr(vcpu, new_msr);
 519
 520                 if (!keep_irq)
 521                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 522         }
 523
 524 #ifdef CONFIG_KVM_BOOKE_HV
 525         /*
 526          * If an interrupt is pending but masked, raise a guest doorbell
 527          * so that we are notified when the guest enables the relevant
 528          * MSR bit.
 529          */
 530         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
 531                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
 532         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
 533                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
 534         if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
 535                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
 536 #endif
 537
 538         return allowed;
 539 }
 540
 541 /*
 542  * Return the number of jiffies until the next timeout.  If the timeout is
 543  * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA
 544  * because the larger value can break the timer APIs.
 545  */
 546 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu)
 547 {
 548         u64 tb, wdt_tb, wdt_ticks = 0;
 549         u64 nr_jiffies = 0;
 550         u32 period = TCR_GET_WP(vcpu->arch.tcr);
 551
 552         wdt_tb = 1ULL << (63 - period);
 553         tb = get_tb();
 554         /*
 555          * The watchdog timeout will hapeen when TB bit corresponding
 556          * to watchdog will toggle from 0 to 1.
 557          */
 558         if (tb & wdt_tb)
 559                 wdt_ticks = wdt_tb;
 560
 561         wdt_ticks += wdt_tb - (tb & (wdt_tb - 1));
 562
 563         /* Convert timebase ticks to jiffies */
 564         nr_jiffies = wdt_ticks;
 565
 566         if (do_div(nr_jiffies, tb_ticks_per_jiffy))
 567                 nr_jiffies++;
 568
 569         return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA);
 570 }
 571
 572 static void arm_next_watchdog(struct kvm_vcpu *vcpu)
 573 {
 574         unsigned long nr_jiffies;
 575         unsigned long flags;
 576
 577         /*
 578          * If TSR_ENW and TSR_WIS are not set then no need to exit to
 579          * userspace, so clear the KVM_REQ_WATCHDOG request.
 580          */
 581         if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS))
 582                 clear_bit(KVM_REQ_WATCHDOG, &vcpu->requests);
 583
 584         spin_lock_irqsave(&vcpu->arch.wdt_lock, flags);
 585         nr_jiffies = watchdog_next_timeout(vcpu);
 586         /*
 587          * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA
 588          * then do not run the watchdog timer as this can break timer APIs.
 589          */
 590         if (nr_jiffies < NEXT_TIMER_MAX_DELTA)
 591                 mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies);
 592         else
 593                 del_timer(&vcpu->arch.wdt_timer);
 594         spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags);
 595 }
 596
 597 void kvmppc_watchdog_func(unsigned long data)
 598 {
 599         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
 600         u32 tsr, new_tsr;
 601         int final;
 602
 603         do {
 604                 new_tsr = tsr = vcpu->arch.tsr;
 605                 final = 0;
 606
 607                 /* Time out event */
 608                 if (tsr & TSR_ENW) {
 609                         if (tsr & TSR_WIS)
 610                                 final = 1;
 611                         else
 612                                 new_tsr = tsr | TSR_WIS;
 613                 } else {
 614                         new_tsr = tsr | TSR_ENW;
 615                 }
 616         } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr);
 617
 618         if (new_tsr & TSR_WIS) {
 619                 smp_wmb();
 620                 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
 621                 kvm_vcpu_kick(vcpu);
 622         }
 623
 624         /*
 625          * If this is final watchdog expiry and some action is required
 626          * then exit to userspace.
 627          */
 628         if (final && (vcpu->arch.tcr & TCR_WRC_MASK) &&
 629             vcpu->arch.watchdog_enabled) {
 630                 smp_wmb();
 631                 kvm_make_request(KVM_REQ_WATCHDOG, vcpu);
 632                 kvm_vcpu_kick(vcpu);
 633         }
 634
 635         /*
 636          * Stop running the watchdog timer after final expiration to
 637          * prevent the host from being flooded with timers if the
 638          * guest sets a short period.
 639          * Timers will resume when TSR/TCR is updated next time.
 640          */
 641         if (!final)
 642                 arm_next_watchdog(vcpu);
 643 }
 644
 645 static void update_timer_ints(struct kvm_vcpu *vcpu)
 646 {
 647         if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
 648                 kvmppc_core_queue_dec(vcpu);
 649         else
 650                 kvmppc_core_dequeue_dec(vcpu);
 651
 652         if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS))
 653                 kvmppc_core_queue_watchdog(vcpu);
 654         else
 655                 kvmppc_core_dequeue_watchdog(vcpu);
 656 }
 657
 658 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
 659 {
 660         unsigned long *pending = &vcpu->arch.pending_exceptions;
 661         unsigned int priority;
 662
 663         priority = __ffs(*pending);
 664         while (priority < BOOKE_IRQPRIO_MAX) {
 665                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 666                         break;
 667
 668                 priority = find_next_bit(pending,
 669                                          BITS_PER_BYTE * sizeof(*pending),
 670                                          priority + 1);
 671         }
 672
 673         /* Tell the guest about our interrupt status */
 674         vcpu->arch.shared->int_pending = !!*pending;
 675 }
 676
 677 /* Check pending exceptions and deliver one, if possible. */
 678 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 679 {
 680         int r = 0;
 681         WARN_ON_ONCE(!irqs_disabled());
 682
 683         kvmppc_core_check_exceptions(vcpu);
 684
 685         if (vcpu->requests) {
 686                 /* Exception delivery raised request; start over */
 687                 return 1;
 688         }
 689
 690         if (vcpu->arch.shared->msr & MSR_WE) {
 691                 local_irq_enable();
 692                 kvm_vcpu_block(vcpu);
 693                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 694                 hard_irq_disable();
 695
 696                 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
 697                 r = 1;
 698         };
 699
 700         return r;
 701 }
 702
 703 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 704 {
 705         int r = 1; /* Indicate we want to get back into the guest */
 706
 707         if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
 708                 update_timer_ints(vcpu);
 709 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 710         if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
 711                 kvmppc_core_flush_tlb(vcpu);
 712 #endif
 713
 714         if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) {
 715                 vcpu->run->exit_reason = KVM_EXIT_WATCHDOG;
 716                 r = 0;
 717         }
 718
 719         if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) {
 720                 vcpu->run->epr.epr = 0;
 721                 vcpu->arch.epr_needed = true;
 722                 vcpu->run->exit_reason = KVM_EXIT_EPR;
 723                 r = 0;
 724         }
 725
 726         return r;
 727 }
 728
 729 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 730 {
 731         int ret, s;
 732         struct debug_reg debug;
 733
 734         if (!vcpu->arch.sane) {
 735                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 736                 return -EINVAL;
 737         }
 738
 739         s = kvmppc_prepare_to_enter(vcpu);
 740         if (s <= 0) {
 741                 ret = s;
 742                 goto out;
 743         }
 744         /* interrupts now hard-disabled */
 745
 746 #ifdef CONFIG_PPC_FPU
 747         /* Save userspace FPU state in stack */
 748         enable_kernel_fp();
 749
 750         /*
 751          * Since we can't trap on MSR_FP in GS-mode, we consider the guest
 752          * as always using the FPU.
 753          */
 754         kvmppc_load_guest_fp(vcpu);
 755 #endif
 756
 757 #ifdef CONFIG_ALTIVEC
 758         /* Save userspace AltiVec state in stack */
 759         if (cpu_has_feature(CPU_FTR_ALTIVEC))
 760                 enable_kernel_altivec();
 761         /*
 762          * Since we can't trap on MSR_VEC in GS-mode, we consider the guest
 763          * as always using the AltiVec.
 764          */
 765         kvmppc_load_guest_altivec(vcpu);
 766 #endif
 767
 768         /* Switch to guest debug context */
 769         debug = vcpu->arch.dbg_reg;
 770         switch_booke_debug_regs(&debug);
 771         debug = current->thread.debug;
 772         current->thread.debug = vcpu->arch.dbg_reg;
 773
 774         vcpu->arch.pgdir = current->mm->pgd;
 775         kvmppc_fix_ee_before_entry();
 776
 777         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
 778
 779         /* No need for guest_exit. It's done in handle_exit.
 780            We also get here with interrupts enabled. */
 781
 782         /* Switch back to user space debug context */
 783         switch_booke_debug_regs(&debug);
 784         current->thread.debug = debug;
 785
 786 #ifdef CONFIG_PPC_FPU
 787         kvmppc_save_guest_fp(vcpu);
 788 #endif
 789
 790 #ifdef CONFIG_ALTIVEC
 791         kvmppc_save_guest_altivec(vcpu);
 792 #endif
 793
 794 out:
 795         vcpu->mode = OUTSIDE_GUEST_MODE;
 796         return ret;
 797 }
 798
 799 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
 800 {
 801         enum emulation_result er;
 802
 803         er = kvmppc_emulate_instruction(run, vcpu);
 804         switch (er) {
 805         case EMULATE_DONE:
 806                 /* don't overwrite subtypes, just account kvm_stats */
 807                 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 808                 /* Future optimization: only reload non-volatiles if
 809                  * they were actually modified by emulation. */
 810                 return RESUME_GUEST_NV;
 811
 812         case EMULATE_AGAIN:
 813                 return RESUME_GUEST;
 814
 815         case EMULATE_FAIL:
 816                 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 817                        __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 818                 /* For debugging, encode the failing instruction and
 819                  * report it to userspace. */
 820                 run->hw.hardware_exit_reason = ~0ULL << 32;
 821                 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 822                 kvmppc_core_queue_program(vcpu, ESR_PIL);
 823                 return RESUME_HOST;
 824
 825         case EMULATE_EXIT_USER:
 826                 return RESUME_HOST;
 827
 828         default:
 829                 BUG();
 830         }
 831 }
 832
 833 static int kvmppc_handle_debug(struct kvm_run *run, struct kvm_vcpu *vcpu)
 834 {
 835         struct debug_reg *dbg_reg = &(vcpu->arch.dbg_reg);
 836         u32 dbsr = vcpu->arch.dbsr;
 837
 838         if (vcpu->guest_debug == 0) {
 839                 /*
 840                  * Debug resources belong to Guest.
 841                  * Imprecise debug event is not injected
 842                  */
 843                 if (dbsr & DBSR_IDE) {
 844                         dbsr &= ~DBSR_IDE;
 845                         if (!dbsr)
 846                                 return RESUME_GUEST;
 847                 }
 848
 849                 if (dbsr && (vcpu->arch.shared->msr & MSR_DE) &&
 850                             (vcpu->arch.dbg_reg.dbcr0 & DBCR0_IDM))
 851                         kvmppc_core_queue_debug(vcpu);
 852
 853                 /* Inject a program interrupt if trap debug is not allowed */
 854                 if ((dbsr & DBSR_TIE) && !(vcpu->arch.shared->msr & MSR_DE))
 855                         kvmppc_core_queue_program(vcpu, ESR_PTR);
 856
 857                 return RESUME_GUEST;
 858         }
 859
 860         /*
 861          * Debug resource owned by userspace.
 862          * Clear guest dbsr (vcpu->arch.dbsr)
 863          */
 864         vcpu->arch.dbsr = 0;
 865         run->debug.arch.status = 0;
 866         run->debug.arch.address = vcpu->arch.pc;
 867
 868         if (dbsr & (DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4)) {
 869                 run->debug.arch.status |= KVMPPC_DEBUG_BREAKPOINT;
 870         } else {
 871                 if (dbsr & (DBSR_DAC1W | DBSR_DAC2W))
 872                         run->debug.arch.status |= KVMPPC_DEBUG_WATCH_WRITE;
 873                 else if (dbsr & (DBSR_DAC1R | DBSR_DAC2R))
 874                         run->debug.arch.status |= KVMPPC_DEBUG_WATCH_READ;
 875                 if (dbsr & (DBSR_DAC1R | DBSR_DAC1W))
 876                         run->debug.arch.address = dbg_reg->dac1;
 877                 else if (dbsr & (DBSR_DAC2R | DBSR_DAC2W))
 878                         run->debug.arch.address = dbg_reg->dac2;
 879         }
 880
 881         return RESUME_HOST;
 882 }
 883
 884 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
 885 {
 886         ulong r1, ip, msr, lr;
 887
 888         asm("mr %0, 1" : "=r"(r1));
 889         asm("mflr %0" : "=r"(lr));
 890         asm("mfmsr %0" : "=r"(msr));
 891         asm("bl 1f; 1: mflr %0" : "=r"(ip));
 892
 893         memset(regs, 0, sizeof(*regs));
 894         regs->gpr[1] = r1;
 895         regs->nip = ip;
 896         regs->msr = msr;
 897         regs->link = lr;
 898 }
 899
 900 /*
 901  * For interrupts needed to be handled by host interrupt handlers,
 902  * corresponding host handler are called from here in similar way
 903  * (but not exact) as they are called from low level handler
 904  * (such as from arch/powerpc/kernel/head_fsl_booke.S).
 905  */
 906 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
 907                                      unsigned int exit_nr)
 908 {
 909         struct pt_regs regs;
 910
 911         switch (exit_nr) {
 912         case BOOKE_INTERRUPT_EXTERNAL:
 913                 kvmppc_fill_pt_regs(&regs);
 914                 do_IRQ(&regs);
 915                 break;
 916         case BOOKE_INTERRUPT_DECREMENTER:
 917                 kvmppc_fill_pt_regs(&regs);
 918                 timer_interrupt(&regs);
 919                 break;
 920 #if defined(CONFIG_PPC_DOORBELL)
 921         case BOOKE_INTERRUPT_DOORBELL:
 922                 kvmppc_fill_pt_regs(&regs);
 923                 doorbell_exception(&regs);
 924                 break;
 925 #endif
 926         case BOOKE_INTERRUPT_MACHINE_CHECK:
 927                 /* FIXME */
 928                 break;
 929         case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
 930                 kvmppc_fill_pt_regs(&regs);
 931                 performance_monitor_exception(&regs);
 932                 break;
 933         case BOOKE_INTERRUPT_WATCHDOG:
 934                 kvmppc_fill_pt_regs(&regs);
 935 #ifdef CONFIG_BOOKE_WDT
 936                 WatchdogException(&regs);
 937 #else
 938                 unknown_exception(&regs);
 939 #endif
 940                 break;
 941         case BOOKE_INTERRUPT_CRITICAL:
 942                 kvmppc_fill_pt_regs(&regs);
 943                 unknown_exception(&regs);
 944                 break;
 945         case BOOKE_INTERRUPT_DEBUG:
 946                 /* Save DBSR before preemption is enabled */
 947                 vcpu->arch.dbsr = mfspr(SPRN_DBSR);
 948                 kvmppc_clear_dbsr();
 949                 break;
 950         }
 951 }
 952
 953 static int kvmppc_resume_inst_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 954                                   enum emulation_result emulated, u32 last_inst)
 955 {
 956         switch (emulated) {
 957         case EMULATE_AGAIN:
 958                 return RESUME_GUEST;
 959
 960         case EMULATE_FAIL:
 961                 pr_debug("%s: load instruction from guest address %lx failed\n",
 962                        __func__, vcpu->arch.pc);
 963                 /* For debugging, encode the failing instruction and
 964                  * report it to userspace. */
 965                 run->hw.hardware_exit_reason = ~0ULL << 32;
 966                 run->hw.hardware_exit_reason |= last_inst;
 967                 kvmppc_core_queue_program(vcpu, ESR_PIL);
 968                 return RESUME_HOST;
 969
 970         default:
 971                 BUG();
 972         }
 973 }
 974
 975 /**
 976  * kvmppc_handle_exit
 977  *
 978  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 979  */
 980 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 981                        unsigned int exit_nr)
 982 {
 983         int r = RESUME_HOST;
 984         int s;
 985         int idx;
 986         u32 last_inst = KVM_INST_FETCH_FAILED;
 987         enum emulation_result emulated = EMULATE_DONE;
 988
 989         /* update before a new last_exit_type is rewritten */
 990         kvmppc_update_timing_stats(vcpu);
 991
 992         /* restart interrupts if they were meant for the host */
 993         kvmppc_restart_interrupt(vcpu, exit_nr);
 994
 995         /*
 996          * get last instruction before being preempted
 997          * TODO: for e6500 check also BOOKE_INTERRUPT_LRAT_ERROR & ESR_DATA
 998          */
 999         switch (exit_nr) {
1000         case BOOKE_INTERRUPT_DATA_STORAGE:
1001         case BOOKE_INTERRUPT_DTLB_MISS:
1002         case BOOKE_INTERRUPT_HV_PRIV:
1003                 emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1004                 break;
1005         case BOOKE_INTERRUPT_PROGRAM:
1006                 /* SW breakpoints arrive as illegal instructions on HV */
1007                 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
1008                         emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1009                 break;
1010         default:
1011                 break;
1012         }
1013
1014         trace_kvm_exit(exit_nr, vcpu);
1015         guest_exit_irqoff();
1016
1017         local_irq_enable();
1018
1019         run->exit_reason = KVM_EXIT_UNKNOWN;
1020         run->ready_for_interrupt_injection = 1;
1021
1022         if (emulated != EMULATE_DONE) {
1023                 r = kvmppc_resume_inst_load(run, vcpu, emulated, last_inst);
1024                 goto out;
1025         }
1026
1027         switch (exit_nr) {
1028         case BOOKE_INTERRUPT_MACHINE_CHECK:
1029                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
1030                 kvmppc_dump_vcpu(vcpu);
1031                 /* For debugging, send invalid exit reason to user space */
1032                 run->hw.hardware_exit_reason = ~1ULL << 32;
1033                 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
1034                 r = RESUME_HOST;
1035                 break;
1036
1037         case BOOKE_INTERRUPT_EXTERNAL:
1038                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
1039                 r = RESUME_GUEST;
1040                 break;
1041
1042         case BOOKE_INTERRUPT_DECREMENTER:
1043                 kvmppc_account_exit(vcpu, DEC_EXITS);
1044                 r = RESUME_GUEST;
1045                 break;
1046
1047         case BOOKE_INTERRUPT_WATCHDOG:
1048                 r = RESUME_GUEST;
1049                 break;
1050
1051         case BOOKE_INTERRUPT_DOORBELL:
1052                 kvmppc_account_exit(vcpu, DBELL_EXITS);
1053                 r = RESUME_GUEST;
1054                 break;
1055
1056         case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
1057                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
1058
1059                 /*
1060                  * We are here because there is a pending guest interrupt
1061                  * which could not be delivered as MSR_CE or MSR_ME was not
1062                  * set.  Once we break from here we will retry delivery.
1063                  */
1064                 r = RESUME_GUEST;
1065                 break;
1066
1067         case BOOKE_INTERRUPT_GUEST_DBELL:
1068                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
1069
1070                 /*
1071                  * We are here because there is a pending guest interrupt
1072                  * which could not be delivered as MSR_EE was not set.  Once
1073                  * we break from here we will retry delivery.
1074                  */
1075                 r = RESUME_GUEST;
1076                 break;
1077
1078         case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
1079                 r = RESUME_GUEST;
1080                 break;
1081
1082         case BOOKE_INTERRUPT_HV_PRIV:
1083                 r = emulation_exit(run, vcpu);
1084                 break;
1085
1086         case BOOKE_INTERRUPT_PROGRAM:
1087                 if ((vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) &&
1088                         (last_inst == KVMPPC_INST_SW_BREAKPOINT)) {
1089                         /*
1090                          * We are here because of an SW breakpoint instr,
1091                          * so lets return to host to handle.
1092                          */
1093                         r = kvmppc_handle_debug(run, vcpu);
1094                         run->exit_reason = KVM_EXIT_DEBUG;
1095                         kvmppc_account_exit(vcpu, DEBUG_EXITS);
1096                         break;
1097                 }
1098
1099                 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
1100                         /*
1101                          * Program traps generated by user-level software must
1102                          * be handled by the guest kernel.
1103                          *
1104                          * In GS mode, hypervisor privileged instructions trap
1105                          * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
1106                          * actual program interrupts, handled by the guest.
1107                          */
1108                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
1109                         r = RESUME_GUEST;
1110                         kvmppc_account_exit(vcpu, USR_PR_INST);
1111                         break;
1112                 }
1113
1114                 r = emulation_exit(run, vcpu);
1115                 break;
1116
1117         case BOOKE_INTERRUPT_FP_UNAVAIL:
1118                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
1119                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
1120                 r = RESUME_GUEST;
1121                 break;
1122
1123 #ifdef CONFIG_SPE
1124         case BOOKE_INTERRUPT_SPE_UNAVAIL: {
1125                 if (vcpu->arch.shared->msr & MSR_SPE)
1126                         kvmppc_vcpu_enable_spe(vcpu);
1127                 else
1128                         kvmppc_booke_queue_irqprio(vcpu,
1129                                                    BOOKE_IRQPRIO_SPE_UNAVAIL);
1130                 r = RESUME_GUEST;
1131                 break;
1132         }
1133
1134         case BOOKE_INTERRUPT_SPE_FP_DATA:
1135                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
1136                 r = RESUME_GUEST;
1137                 break;
1138
1139         case BOOKE_INTERRUPT_SPE_FP_ROUND:
1140                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
1141                 r = RESUME_GUEST;
1142                 break;
1143 #elif defined(CONFIG_SPE_POSSIBLE)
1144         case BOOKE_INTERRUPT_SPE_UNAVAIL:
1145                 /*
1146                  * Guest wants SPE, but host kernel doesn't support it.  Send
1147                  * an "unimplemented operation" program check to the guest.
1148                  */
1149                 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
1150                 r = RESUME_GUEST;
1151                 break;
1152
1153         /*
1154          * These really should never happen without CONFIG_SPE,
1155          * as we should never enable the real MSR[SPE] in the guest.
1156          */
1157         case BOOKE_INTERRUPT_SPE_FP_DATA:
1158         case BOOKE_INTERRUPT_SPE_FP_ROUND:
1159                 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
1160                        __func__, exit_nr, vcpu->arch.pc);
1161                 run->hw.hardware_exit_reason = exit_nr;
1162                 r = RESUME_HOST;
1163                 break;
1164 #endif /* CONFIG_SPE_POSSIBLE */
1165
1166 /*
1167  * On cores with Vector category, KVM is loaded only if CONFIG_ALTIVEC,
1168  * see kvmppc_core_check_processor_compat().
1169  */
1170 #ifdef CONFIG_ALTIVEC
1171         case BOOKE_INTERRUPT_ALTIVEC_UNAVAIL:
1172                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL);
1173                 r = RESUME_GUEST;
1174                 break;
1175
1176         case BOOKE_INTERRUPT_ALTIVEC_ASSIST:
1177                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_ASSIST);
1178                 r = RESUME_GUEST;
1179                 break;
1180 #endif
1181
1182         case BOOKE_INTERRUPT_DATA_STORAGE:
1183                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
1184                                                vcpu->arch.fault_esr);
1185                 kvmppc_account_exit(vcpu, DSI_EXITS);
1186                 r = RESUME_GUEST;
1187                 break;
1188
1189         case BOOKE_INTERRUPT_INST_STORAGE:
1190                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
1191                 kvmppc_account_exit(vcpu, ISI_EXITS);
1192                 r = RESUME_GUEST;
1193                 break;
1194
1195         case BOOKE_INTERRUPT_ALIGNMENT:
1196                 kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear,
1197                                             vcpu->arch.fault_esr);
1198                 r = RESUME_GUEST;
1199                 break;
1200
1201 #ifdef CONFIG_KVM_BOOKE_HV
1202         case BOOKE_INTERRUPT_HV_SYSCALL:
1203                 if (!(vcpu->arch.shared->msr & MSR_PR)) {
1204                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1205                 } else {
1206                         /*
1207                          * hcall from guest userspace -- send privileged
1208                          * instruction program check.
1209                          */
1210                         kvmppc_core_queue_program(vcpu, ESR_PPR);
1211                 }
1212
1213                 r = RESUME_GUEST;
1214                 break;
1215 #else
1216         case BOOKE_INTERRUPT_SYSCALL:
1217                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1218                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1219                         /* KVM PV hypercalls */
1220                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1221                         r = RESUME_GUEST;
1222                 } else {
1223                         /* Guest syscalls */
1224                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
1225                 }
1226                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
1227                 r = RESUME_GUEST;
1228                 break;
1229 #endif
1230
1231         case BOOKE_INTERRUPT_DTLB_MISS: {
1232                 unsigned long eaddr = vcpu->arch.fault_dear;
1233                 int gtlb_index;
1234                 gpa_t gpaddr;
1235                 gfn_t gfn;
1236
1237 #ifdef CONFIG_KVM_E500V2
1238                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1239                     (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1240                         kvmppc_map_magic(vcpu);
1241                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1242                         r = RESUME_GUEST;
1243
1244                         break;
1245                 }
1246 #endif
1247
1248                 /* Check the guest TLB. */
1249                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1250                 if (gtlb_index < 0) {
1251                         /* The guest didn't have a mapping for it. */
1252                         kvmppc_core_queue_dtlb_miss(vcpu,
1253                                                     vcpu->arch.fault_dear,
1254                                                     vcpu->arch.fault_esr);
1255                         kvmppc_mmu_dtlb_miss(vcpu);
1256                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
1257                         r = RESUME_GUEST;
1258                         break;
1259                 }
1260
1261                 idx = srcu_read_lock(&vcpu->kvm->srcu);
1262
1263                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1264                 gfn = gpaddr >> PAGE_SHIFT;
1265
1266                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1267                         /* The guest TLB had a mapping, but the shadow TLB
1268                          * didn't, and it is RAM. This could be because:
1269                          * a) the entry is mapping the host kernel, or
1270                          * b) the guest used a large mapping which we're faking
1271                          * Either way, we need to satisfy the fault without
1272                          * invoking the guest. */
1273                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1274                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1275                         r = RESUME_GUEST;
1276                 } else {
1277                         /* Guest has mapped and accessed a page which is not
1278                          * actually RAM. */
1279                         vcpu->arch.paddr_accessed = gpaddr;
1280                         vcpu->arch.vaddr_accessed = eaddr;
1281                         r = kvmppc_emulate_mmio(run, vcpu);
1282                         kvmppc_account_exit(vcpu, MMIO_EXITS);
1283                 }
1284
1285                 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1286                 break;
1287         }
1288
1289         case BOOKE_INTERRUPT_ITLB_MISS: {
1290                 unsigned long eaddr = vcpu->arch.pc;
1291                 gpa_t gpaddr;
1292                 gfn_t gfn;
1293                 int gtlb_index;
1294
1295                 r = RESUME_GUEST;
1296
1297                 /* Check the guest TLB. */
1298                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1299                 if (gtlb_index < 0) {
1300                         /* The guest didn't have a mapping for it. */
1301                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
1302                         kvmppc_mmu_itlb_miss(vcpu);
1303                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
1304                         break;
1305                 }
1306
1307                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
1308
1309                 idx = srcu_read_lock(&vcpu->kvm->srcu);
1310
1311                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1312                 gfn = gpaddr >> PAGE_SHIFT;
1313
1314                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1315                         /* The guest TLB had a mapping, but the shadow TLB
1316                          * didn't. This could be because:
1317                          * a) the entry is mapping the host kernel, or
1318                          * b) the guest used a large mapping which we're faking
1319                          * Either way, we need to satisfy the fault without
1320                          * invoking the guest. */
1321                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1322                 } else {
1323                         /* Guest mapped and leaped at non-RAM! */
1324                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
1325                 }
1326
1327                 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1328                 break;
1329         }
1330
1331         case BOOKE_INTERRUPT_DEBUG: {
1332                 r = kvmppc_handle_debug(run, vcpu);
1333                 if (r == RESUME_HOST)
1334                         run->exit_reason = KVM_EXIT_DEBUG;
1335                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
1336                 break;
1337         }
1338
1339         default:
1340                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
1341                 BUG();
1342         }
1343
1344 out:
1345         /*
1346          * To avoid clobbering exit_reason, only check for signals if we
1347          * aren't already exiting to userspace for some other reason.
1348          */
1349         if (!(r & RESUME_HOST)) {
1350                 s = kvmppc_prepare_to_enter(vcpu);
1351                 if (s <= 0)
1352                         r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
1353                 else {
1354                         /* interrupts now hard-disabled */
1355                         kvmppc_fix_ee_before_entry();
1356                         kvmppc_load_guest_fp(vcpu);
1357                         kvmppc_load_guest_altivec(vcpu);
1358                 }
1359         }
1360
1361         return r;
1362 }
1363
1364 static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr)
1365 {
1366         u32 old_tsr = vcpu->arch.tsr;
1367
1368         vcpu->arch.tsr = new_tsr;
1369
1370         if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS))
1371                 arm_next_watchdog(vcpu);
1372
1373         update_timer_ints(vcpu);
1374 }
1375
1376 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
1377 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1378 {
1379         int i;
1380         int r;
1381
1382         vcpu->arch.pc = 0;
1383         vcpu->arch.shared->pir = vcpu->vcpu_id;
1384         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
1385         kvmppc_set_msr(vcpu, 0);
1386
1387 #ifndef CONFIG_KVM_BOOKE_HV
1388         vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS;
1389         vcpu->arch.shadow_pid = 1;
1390         vcpu->arch.shared->msr = 0;
1391 #endif
1392
1393         /* Eye-catching numbers so we know if the guest takes an interrupt
1394          * before it's programmed its own IVPR/IVORs. */
1395         vcpu->arch.ivpr = 0x55550000;
1396         for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
1397                 vcpu->arch.ivor[i] = 0x7700 | i * 4;
1398
1399         kvmppc_init_timing_stats(vcpu);
1400
1401         r = kvmppc_core_vcpu_setup(vcpu);
1402         kvmppc_sanity_check(vcpu);
1403         return r;
1404 }
1405
1406 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
1407 {
1408         /* setup watchdog timer once */
1409         spin_lock_init(&vcpu->arch.wdt_lock);
1410         setup_timer(&vcpu->arch.wdt_timer, kvmppc_watchdog_func,
1411                     (unsigned long)vcpu);
1412
1413         /*
1414          * Clear DBSR.MRR to avoid guest debug interrupt as
1415          * this is of host interest
1416          */
1417         mtspr(SPRN_DBSR, DBSR_MRR);
1418         return 0;
1419 }
1420
1421 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
1422 {
1423         del_timer_sync(&vcpu->arch.wdt_timer);
1424 }
1425
1426 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1427 {
1428         int i;
1429
1430         regs->pc = vcpu->arch.pc;
1431         regs->cr = kvmppc_get_cr(vcpu);
1432         regs->ctr = vcpu->arch.ctr;
1433         regs->lr = vcpu->arch.lr;
1434         regs->xer = kvmppc_get_xer(vcpu);
1435         regs->msr = vcpu->arch.shared->msr;
1436         regs->srr0 = kvmppc_get_srr0(vcpu);
1437         regs->srr1 = kvmppc_get_srr1(vcpu);
1438         regs->pid = vcpu->arch.pid;
1439         regs->sprg0 = kvmppc_get_sprg0(vcpu);
1440         regs->sprg1 = kvmppc_get_sprg1(vcpu);
1441         regs->sprg2 = kvmppc_get_sprg2(vcpu);
1442         regs->sprg3 = kvmppc_get_sprg3(vcpu);
1443         regs->sprg4 = kvmppc_get_sprg4(vcpu);
1444         regs->sprg5 = kvmppc_get_sprg5(vcpu);
1445         regs->sprg6 = kvmppc_get_sprg6(vcpu);
1446         regs->sprg7 = kvmppc_get_sprg7(vcpu);
1447
1448         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1449                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1450
1451         return 0;
1452 }
1453
1454 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1455 {
1456         int i;
1457
1458         vcpu->arch.pc = regs->pc;
1459         kvmppc_set_cr(vcpu, regs->cr);
1460         vcpu->arch.ctr = regs->ctr;
1461         vcpu->arch.lr = regs->lr;
1462         kvmppc_set_xer(vcpu, regs->xer);
1463         kvmppc_set_msr(vcpu, regs->msr);
1464         kvmppc_set_srr0(vcpu, regs->srr0);
1465         kvmppc_set_srr1(vcpu, regs->srr1);
1466         kvmppc_set_pid(vcpu, regs->pid);
1467         kvmppc_set_sprg0(vcpu, regs->sprg0);
1468         kvmppc_set_sprg1(vcpu, regs->sprg1);
1469         kvmppc_set_sprg2(vcpu, regs->sprg2);
1470         kvmppc_set_sprg3(vcpu, regs->sprg3);
1471         kvmppc_set_sprg4(vcpu, regs->sprg4);
1472         kvmppc_set_sprg5(vcpu, regs->sprg5);
1473         kvmppc_set_sprg6(vcpu, regs->sprg6);
1474         kvmppc_set_sprg7(vcpu, regs->sprg7);
1475
1476         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1477                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1478
1479         return 0;
1480 }
1481
1482 static void get_sregs_base(struct kvm_vcpu *vcpu,
1483                            struct kvm_sregs *sregs)
1484 {
1485         u64 tb = get_tb();
1486
1487         sregs->u.e.features |= KVM_SREGS_E_BASE;
1488
1489         sregs->u.e.csrr0 = vcpu->arch.csrr0;
1490         sregs->u.e.csrr1 = vcpu->arch.csrr1;
1491         sregs->u.e.mcsr = vcpu->arch.mcsr;
1492         sregs->u.e.esr = kvmppc_get_esr(vcpu);
1493         sregs->u.e.dear = kvmppc_get_dar(vcpu);
1494         sregs->u.e.tsr = vcpu->arch.tsr;
1495         sregs->u.e.tcr = vcpu->arch.tcr;
1496         sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1497         sregs->u.e.tb = tb;
1498         sregs->u.e.vrsave = vcpu->arch.vrsave;
1499 }
1500
1501 static int set_sregs_base(struct kvm_vcpu *vcpu,
1502                           struct kvm_sregs *sregs)
1503 {
1504         if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1505                 return 0;
1506
1507         vcpu->arch.csrr0 = sregs->u.e.csrr0;
1508         vcpu->arch.csrr1 = sregs->u.e.csrr1;
1509         vcpu->arch.mcsr = sregs->u.e.mcsr;
1510         kvmppc_set_esr(vcpu, sregs->u.e.esr);
1511         kvmppc_set_dar(vcpu, sregs->u.e.dear);
1512         vcpu->arch.vrsave = sregs->u.e.vrsave;
1513         kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1514
1515         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1516                 vcpu->arch.dec = sregs->u.e.dec;
1517                 kvmppc_emulate_dec(vcpu);
1518         }
1519
1520         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR)
1521                 kvmppc_set_tsr(vcpu, sregs->u.e.tsr);
1522
1523         return 0;
1524 }
1525
1526 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1527                               struct kvm_sregs *sregs)
1528 {
1529         sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1530
1531         sregs->u.e.pir = vcpu->vcpu_id;
1532         sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1533         sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1534         sregs->u.e.decar = vcpu->arch.decar;
1535         sregs->u.e.ivpr = vcpu->arch.ivpr;
1536 }
1537
1538 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1539                              struct kvm_sregs *sregs)
1540 {
1541         if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1542                 return 0;
1543
1544         if (sregs->u.e.pir != vcpu->vcpu_id)
1545                 return -EINVAL;
1546
1547         vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1548         vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1549         vcpu->arch.decar = sregs->u.e.decar;
1550         vcpu->arch.ivpr = sregs->u.e.ivpr;
1551
1552         return 0;
1553 }
1554
1555 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1556 {
1557         sregs->u.e.features |= KVM_SREGS_E_IVOR;
1558
1559         sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1560         sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1561         sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1562         sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1563         sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1564         sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1565         sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1566         sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1567         sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1568         sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1569         sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1570         sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1571         sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1572         sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1573         sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1574         sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1575         return 0;
1576 }
1577
1578 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1579 {
1580         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1581                 return 0;
1582
1583         vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1584         vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1585         vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1586         vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1587         vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1588         vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1589         vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1590         vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1591         vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1592         vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1593         vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1594         vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1595         vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1596         vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1597         vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1598         vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1599
1600         return 0;
1601 }
1602
1603 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1604                                   struct kvm_sregs *sregs)
1605 {
1606         sregs->pvr = vcpu->arch.pvr;
1607
1608         get_sregs_base(vcpu, sregs);
1609         get_sregs_arch206(vcpu, sregs);
1610         return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
1611 }
1612
1613 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1614                                   struct kvm_sregs *sregs)
1615 {
1616         int ret;
1617
1618         if (vcpu->arch.pvr != sregs->pvr)
1619                 return -EINVAL;
1620
1621         ret = set_sregs_base(vcpu, sregs);
1622         if (ret < 0)
1623                 return ret;
1624
1625         ret = set_sregs_arch206(vcpu, sregs);
1626         if (ret < 0)
1627                 return ret;
1628
1629         return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
1630 }
1631
1632 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
1633                         union kvmppc_one_reg *val)
1634 {
1635         int r = 0;
1636
1637         switch (id) {
1638         case KVM_REG_PPC_IAC1:
1639                 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac1);
1640                 break;
1641         case KVM_REG_PPC_IAC2:
1642                 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac2);
1643                 break;
1644 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1645         case KVM_REG_PPC_IAC3:
1646                 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac3);
1647                 break;
1648         case KVM_REG_PPC_IAC4:
1649                 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac4);
1650                 break;
1651 #endif
1652         case KVM_REG_PPC_DAC1:
1653                 *val = get_reg_val(id, vcpu->arch.dbg_reg.dac1);
1654                 break;
1655         case KVM_REG_PPC_DAC2:
1656                 *val = get_reg_val(id, vcpu->arch.dbg_reg.dac2);
1657                 break;
1658         case KVM_REG_PPC_EPR: {
1659                 u32 epr = kvmppc_get_epr(vcpu);
1660                 *val = get_reg_val(id, epr);
1661                 break;
1662         }
1663 #if defined(CONFIG_64BIT)
1664         case KVM_REG_PPC_EPCR:
1665                 *val = get_reg_val(id, vcpu->arch.epcr);
1666                 break;
1667 #endif
1668         case KVM_REG_PPC_TCR:
1669                 *val = get_reg_val(id, vcpu->arch.tcr);
1670                 break;
1671         case KVM_REG_PPC_TSR:
1672                 *val = get_reg_val(id, vcpu->arch.tsr);
1673                 break;
1674         case KVM_REG_PPC_DEBUG_INST:
1675                 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1676                 break;
1677         case KVM_REG_PPC_VRSAVE:
1678                 *val = get_reg_val(id, vcpu->arch.vrsave);
1679                 break;
1680         default:
1681                 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
1682                 break;
1683         }
1684
1685         return r;
1686 }
1687
1688 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
1689                         union kvmppc_one_reg *val)
1690 {
1691         int r = 0;
1692
1693         switch (id) {
1694         case KVM_REG_PPC_IAC1:
1695                 vcpu->arch.dbg_reg.iac1 = set_reg_val(id, *val);
1696                 break;
1697         case KVM_REG_PPC_IAC2:
1698                 vcpu->arch.dbg_reg.iac2 = set_reg_val(id, *val);
1699                 break;
1700 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1701         case KVM_REG_PPC_IAC3:
1702                 vcpu->arch.dbg_reg.iac3 = set_reg_val(id, *val);
1703                 break;
1704         case KVM_REG_PPC_IAC4:
1705                 vcpu->arch.dbg_reg.iac4 = set_reg_val(id, *val);
1706                 break;
1707 #endif
1708         case KVM_REG_PPC_DAC1:
1709                 vcpu->arch.dbg_reg.dac1 = set_reg_val(id, *val);
1710                 break;
1711         case KVM_REG_PPC_DAC2:
1712                 vcpu->arch.dbg_reg.dac2 = set_reg_val(id, *val);
1713                 break;
1714         case KVM_REG_PPC_EPR: {
1715                 u32 new_epr = set_reg_val(id, *val);
1716                 kvmppc_set_epr(vcpu, new_epr);
1717                 break;
1718         }
1719 #if defined(CONFIG_64BIT)
1720         case KVM_REG_PPC_EPCR: {
1721                 u32 new_epcr = set_reg_val(id, *val);
1722                 kvmppc_set_epcr(vcpu, new_epcr);
1723                 break;
1724         }
1725 #endif
1726         case KVM_REG_PPC_OR_TSR: {
1727                 u32 tsr_bits = set_reg_val(id, *val);
1728                 kvmppc_set_tsr_bits(vcpu, tsr_bits);
1729                 break;
1730         }
1731         case KVM_REG_PPC_CLEAR_TSR: {
1732                 u32 tsr_bits = set_reg_val(id, *val);
1733                 kvmppc_clr_tsr_bits(vcpu, tsr_bits);
1734                 break;
1735         }
1736         case KVM_REG_PPC_TSR: {
1737                 u32 tsr = set_reg_val(id, *val);
1738                 kvmppc_set_tsr(vcpu, tsr);
1739                 break;
1740         }
1741         case KVM_REG_PPC_TCR: {
1742                 u32 tcr = set_reg_val(id, *val);
1743                 kvmppc_set_tcr(vcpu, tcr);
1744                 break;
1745         }
1746         case KVM_REG_PPC_VRSAVE:
1747                 vcpu->arch.vrsave = set_reg_val(id, *val);
1748                 break;
1749         default:
1750                 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
1751                 break;
1752         }
1753
1754         return r;
1755 }
1756
1757 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1758 {
1759         return -ENOTSUPP;
1760 }
1761
1762 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1763 {
1764         return -ENOTSUPP;
1765 }
1766
1767 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1768                                   struct kvm_translation *tr)
1769 {
1770         int r;
1771
1772         r = kvmppc_core_vcpu_translate(vcpu, tr);
1773         return r;
1774 }
1775
1776 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1777 {
1778         return -ENOTSUPP;
1779 }
1780
1781 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
1782                               struct kvm_memory_slot *dont)
1783 {
1784 }
1785
1786 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
1787                                unsigned long npages)
1788 {
1789         return 0;
1790 }
1791
1792 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1793                                       struct kvm_memory_slot *memslot,
1794                                       const struct kvm_userspace_memory_region *mem)
1795 {
1796         return 0;
1797 }
1798
1799 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1800                                 const struct kvm_userspace_memory_region *mem,
1801                                 const struct kvm_memory_slot *old,
1802                                 const struct kvm_memory_slot *new)
1803 {
1804 }
1805
1806 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
1807 {
1808 }
1809
1810 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr)
1811 {
1812 #if defined(CONFIG_64BIT)
1813         vcpu->arch.epcr = new_epcr;
1814 #ifdef CONFIG_KVM_BOOKE_HV
1815         vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM;
1816         if (vcpu->arch.epcr  & SPRN_EPCR_ICM)
1817                 vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM;
1818 #endif
1819 #endif
1820 }
1821
1822 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1823 {
1824         vcpu->arch.tcr = new_tcr;
1825         arm_next_watchdog(vcpu);
1826         update_timer_ints(vcpu);
1827 }
1828
1829 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1830 {
1831         set_bits(tsr_bits, &vcpu->arch.tsr);
1832         smp_wmb();
1833         kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1834         kvm_vcpu_kick(vcpu);
1835 }
1836
1837 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1838 {
1839         clear_bits(tsr_bits, &vcpu->arch.tsr);
1840
1841         /*
1842          * We may have stopped the watchdog due to
1843          * being stuck on final expiration.
1844          */
1845         if (tsr_bits & (TSR_ENW | TSR_WIS))
1846                 arm_next_watchdog(vcpu);
1847
1848         update_timer_ints(vcpu);
1849 }
1850
1851 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
1852 {
1853         if (vcpu->arch.tcr & TCR_ARE) {
1854                 vcpu->arch.dec = vcpu->arch.decar;
1855                 kvmppc_emulate_dec(vcpu);
1856         }
1857
1858         kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1859 }
1860
1861 static int kvmppc_booke_add_breakpoint(struct debug_reg *dbg_reg,
1862                                        uint64_t addr, int index)
1863 {
1864         switch (index) {
1865         case 0:
1866                 dbg_reg->dbcr0 |= DBCR0_IAC1;
1867                 dbg_reg->iac1 = addr;
1868                 break;
1869         case 1:
1870                 dbg_reg->dbcr0 |= DBCR0_IAC2;
1871                 dbg_reg->iac2 = addr;
1872                 break;
1873 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1874         case 2:
1875                 dbg_reg->dbcr0 |= DBCR0_IAC3;
1876                 dbg_reg->iac3 = addr;
1877                 break;
1878         case 3:
1879                 dbg_reg->dbcr0 |= DBCR0_IAC4;
1880                 dbg_reg->iac4 = addr;
1881                 break;
1882 #endif
1883         default:
1884                 return -EINVAL;
1885         }
1886
1887         dbg_reg->dbcr0 |= DBCR0_IDM;
1888         return 0;
1889 }
1890
1891 static int kvmppc_booke_add_watchpoint(struct debug_reg *dbg_reg, uint64_t addr,
1892                                        int type, int index)
1893 {
1894         switch (index) {
1895         case 0:
1896                 if (type & KVMPPC_DEBUG_WATCH_READ)
1897                         dbg_reg->dbcr0 |= DBCR0_DAC1R;
1898                 if (type & KVMPPC_DEBUG_WATCH_WRITE)
1899                         dbg_reg->dbcr0 |= DBCR0_DAC1W;
1900                 dbg_reg->dac1 = addr;
1901                 break;
1902         case 1:
1903                 if (type & KVMPPC_DEBUG_WATCH_READ)
1904                         dbg_reg->dbcr0 |= DBCR0_DAC2R;
1905                 if (type & KVMPPC_DEBUG_WATCH_WRITE)
1906                         dbg_reg->dbcr0 |= DBCR0_DAC2W;
1907                 dbg_reg->dac2 = addr;
1908                 break;
1909         default:
1910                 return -EINVAL;
1911         }
1912
1913         dbg_reg->dbcr0 |= DBCR0_IDM;
1914         return 0;
1915 }
1916 void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set)
1917 {
1918         /* XXX: Add similar MSR protection for BookE-PR */
1919 #ifdef CONFIG_KVM_BOOKE_HV
1920         BUG_ON(prot_bitmap & ~(MSRP_UCLEP | MSRP_DEP | MSRP_PMMP));
1921         if (set) {
1922                 if (prot_bitmap & MSR_UCLE)
1923                         vcpu->arch.shadow_msrp |= MSRP_UCLEP;
1924                 if (prot_bitmap & MSR_DE)
1925                         vcpu->arch.shadow_msrp |= MSRP_DEP;
1926                 if (prot_bitmap & MSR_PMM)
1927                         vcpu->arch.shadow_msrp |= MSRP_PMMP;
1928         } else {
1929                 if (prot_bitmap & MSR_UCLE)
1930                         vcpu->arch.shadow_msrp &= ~MSRP_UCLEP;
1931                 if (prot_bitmap & MSR_DE)
1932                         vcpu->arch.shadow_msrp &= ~MSRP_DEP;
1933                 if (prot_bitmap & MSR_PMM)
1934                         vcpu->arch.shadow_msrp &= ~MSRP_PMMP;
1935         }
1936 #endif
1937 }
1938
1939 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
1940                  enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
1941 {
1942         int gtlb_index;
1943         gpa_t gpaddr;
1944
1945 #ifdef CONFIG_KVM_E500V2
1946         if (!(vcpu->arch.shared->msr & MSR_PR) &&
1947             (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1948                 pte->eaddr = eaddr;
1949                 pte->raddr = (vcpu->arch.magic_page_pa & PAGE_MASK) |
1950                              (eaddr & ~PAGE_MASK);
1951                 pte->vpage = eaddr >> PAGE_SHIFT;
1952                 pte->may_read = true;
1953                 pte->may_write = true;
1954                 pte->may_execute = true;
1955
1956                 return 0;
1957         }
1958 #endif
1959
1960         /* Check the guest TLB. */
1961         switch (xlid) {
1962         case XLATE_INST:
1963                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1964                 break;
1965         case XLATE_DATA:
1966                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1967                 break;
1968         default:
1969                 BUG();
1970         }
1971
1972         /* Do we have a TLB entry at all? */
1973         if (gtlb_index < 0)
1974                 return -ENOENT;
1975
1976         gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1977
1978         pte->eaddr = eaddr;
1979         pte->raddr = (gpaddr & PAGE_MASK) | (eaddr & ~PAGE_MASK);
1980         pte->vpage = eaddr >> PAGE_SHIFT;
1981
1982         /* XXX read permissions from the guest TLB */
1983         pte->may_read = true;
1984         pte->may_write = true;
1985         pte->may_execute = true;
1986
1987         return 0;
1988 }
1989
1990 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1991                                          struct kvm_guest_debug *dbg)
1992 {
1993         struct debug_reg *dbg_reg;
1994         int n, b = 0, w = 0;
1995
1996         if (!(dbg->control & KVM_GUESTDBG_ENABLE)) {
1997                 vcpu->arch.dbg_reg.dbcr0 = 0;
1998                 vcpu->guest_debug = 0;
1999                 kvm_guest_protect_msr(vcpu, MSR_DE, false);
2000                 return 0;
2001         }
2002
2003         kvm_guest_protect_msr(vcpu, MSR_DE, true);
2004         vcpu->guest_debug = dbg->control;
2005         vcpu->arch.dbg_reg.dbcr0 = 0;
2006
2007         if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
2008                 vcpu->arch.dbg_reg.dbcr0 |= DBCR0_IDM | DBCR0_IC;
2009
2010         /* Code below handles only HW breakpoints */
2011         dbg_reg = &(vcpu->arch.dbg_reg);
2012
2013 #ifdef CONFIG_KVM_BOOKE_HV
2014         /*
2015          * On BookE-HV (e500mc) the guest is always executed with MSR.GS=1
2016          * DBCR1 and DBCR2 are set to trigger debug events when MSR.PR is 0
2017          */
2018         dbg_reg->dbcr1 = 0;
2019         dbg_reg->dbcr2 = 0;
2020 #else
2021         /*
2022          * On BookE-PR (e500v2) the guest is always executed with MSR.PR=1
2023          * We set DBCR1 and DBCR2 to only trigger debug events when MSR.PR
2024          * is set.
2025          */
2026         dbg_reg->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US | DBCR1_IAC3US |
2027                           DBCR1_IAC4US;
2028         dbg_reg->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US;
2029 #endif
2030
2031         if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
2032                 return 0;
2033
2034         for (n = 0; n < (KVMPPC_BOOKE_IAC_NUM + KVMPPC_BOOKE_DAC_NUM); n++) {
2035                 uint64_t addr = dbg->arch.bp[n].addr;
2036                 uint32_t type = dbg->arch.bp[n].type;
2037
2038                 if (type == KVMPPC_DEBUG_NONE)
2039                         continue;
2040
2041                 if (type & ~(KVMPPC_DEBUG_WATCH_READ |
2042                              KVMPPC_DEBUG_WATCH_WRITE |
2043                              KVMPPC_DEBUG_BREAKPOINT))
2044                         return -EINVAL;
2045
2046                 if (type & KVMPPC_DEBUG_BREAKPOINT) {
2047                         /* Setting H/W breakpoint */
2048                         if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++))
2049                                 return -EINVAL;
2050                 } else {
2051                         /* Setting H/W watchpoint */
2052                         if (kvmppc_booke_add_watchpoint(dbg_reg, addr,
2053                                                         type, w++))
2054                                 return -EINVAL;
2055                 }
2056         }
2057
2058         return 0;
2059 }
2060
2061 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2062 {
2063         vcpu->cpu = smp_processor_id();
2064         current->thread.kvm_vcpu = vcpu;
2065 }
2066
2067 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
2068 {
2069         current->thread.kvm_vcpu = NULL;
2070         vcpu->cpu = -1;
2071
2072         /* Clear pending debug event in DBSR */
2073         kvmppc_clear_dbsr();
2074 }
2075
2076 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
2077 {
2078         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
2079 }
2080
2081 int kvmppc_core_init_vm(struct kvm *kvm)
2082 {
2083         return kvm->arch.kvm_ops->init_vm(kvm);
2084 }
2085
2086 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
2087 {
2088         return kvm->arch.kvm_ops->vcpu_create(kvm, id);
2089 }
2090
2091 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
2092 {
2093         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
2094 }
2095
2096 void kvmppc_core_destroy_vm(struct kvm *kvm)
2097 {
2098         kvm->arch.kvm_ops->destroy_vm(kvm);
2099 }
2100
2101 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2102 {
2103         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
2104 }
2105
2106 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
2107 {
2108         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
2109 }
2110
2111 int __init kvmppc_booke_init(void)
2112 {
2113 #ifndef CONFIG_KVM_BOOKE_HV
2114         unsigned long ivor[16];
2115         unsigned long *handler = kvmppc_booke_handler_addr;
2116         unsigned long max_ivor = 0;
2117         unsigned long handler_len;
2118         int i;
2119
2120         /* We install our own exception handlers by hijacking IVPR. IVPR must
2121          * be 16-bit aligned, so we need a 64KB allocation. */
2122         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
2123                                                  VCPU_SIZE_ORDER);
2124         if (!kvmppc_booke_handlers)
2125                 return -ENOMEM;
2126
2127         /* XXX make sure our handlers are smaller than Linux's */
2128
2129         /* Copy our interrupt handlers to match host IVORs. That way we don't
2130          * have to swap the IVORs on every guest/host transition. */
2131         ivor[0] = mfspr(SPRN_IVOR0);
2132         ivor[1] = mfspr(SPRN_IVOR1);
2133         ivor[2] = mfspr(SPRN_IVOR2);
2134         ivor[3] = mfspr(SPRN_IVOR3);
2135         ivor[4] = mfspr(SPRN_IVOR4);
2136         ivor[5] = mfspr(SPRN_IVOR5);
2137         ivor[6] = mfspr(SPRN_IVOR6);
2138         ivor[7] = mfspr(SPRN_IVOR7);
2139         ivor[8] = mfspr(SPRN_IVOR8);
2140         ivor[9] = mfspr(SPRN_IVOR9);
2141         ivor[10] = mfspr(SPRN_IVOR10);
2142         ivor[11] = mfspr(SPRN_IVOR11);
2143         ivor[12] = mfspr(SPRN_IVOR12);
2144         ivor[13] = mfspr(SPRN_IVOR13);
2145         ivor[14] = mfspr(SPRN_IVOR14);
2146         ivor[15] = mfspr(SPRN_IVOR15);
2147
2148         for (i = 0; i < 16; i++) {
2149                 if (ivor[i] > max_ivor)
2150                         max_ivor = i;
2151
2152                 handler_len = handler[i + 1] - handler[i];
2153                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
2154                        (void *)handler[i], handler_len);
2155         }
2156
2157         handler_len = handler[max_ivor + 1] - handler[max_ivor];
2158         flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers +
2159                            ivor[max_ivor] + handler_len);
2160 #endif /* !BOOKE_HV */
2161         return 0;
2162 }
2163
2164 void __exit kvmppc_booke_exit(void)
2165 {
2166         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
2167         kvm_exit();
2168 }