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