arch/powerpc/kvm/booke.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright IBM Corp. 2007
  16  * Copyright 2010-2011 Freescale Semiconductor, Inc.
  17  *
  18  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  19  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
  20  *          Scott Wood <scottwood@freescale.com>
  21  *          Varun Sethi <varun.sethi@freescale.com>
  22  */
  23
  24 #include <linux/errno.h>
  25 #include <linux/err.h>
  26 #include <linux/kvm_host.h>
  27 #include <linux/gfp.h>
  28 #include <linux/module.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/fs.h>
  31
  32 #include <asm/cputable.h>
  33 #include <asm/uaccess.h>
  34 #include <asm/kvm_ppc.h>
  35 #include <asm/cacheflush.h>
  36 #include <asm/dbell.h>
  37 #include <asm/hw_irq.h>
  38 #include <asm/irq.h>
  39
  40 #include "timing.h"
  41 #include "booke.h"
  42
  43 unsigned long kvmppc_booke_handlers;
  44
  45 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
  46 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  47
  48 struct kvm_stats_debugfs_item debugfs_entries[] = {
  49         { "mmio",       VCPU_STAT(mmio_exits) },
  50         { "dcr",        VCPU_STAT(dcr_exits) },
  51         { "sig",        VCPU_STAT(signal_exits) },
  52         { "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
  53         { "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
  54         { "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
  55         { "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
  56         { "sysc",       VCPU_STAT(syscall_exits) },
  57         { "isi",        VCPU_STAT(isi_exits) },
  58         { "dsi",        VCPU_STAT(dsi_exits) },
  59         { "inst_emu",   VCPU_STAT(emulated_inst_exits) },
  60         { "dec",        VCPU_STAT(dec_exits) },
  61         { "ext_intr",   VCPU_STAT(ext_intr_exits) },
  62         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  63         { "doorbell", VCPU_STAT(dbell_exits) },
  64         { "guest doorbell", VCPU_STAT(gdbell_exits) },
  65         { NULL }
  66 };
  67
  68 /* TODO: use vcpu_printf() */
  69 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
  70 {
  71         int i;
  72
  73         printk("pc:   %08lx msr:  %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
  74         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
  75         printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
  76                                             vcpu->arch.shared->srr1);
  77
  78         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  79
  80         for (i = 0; i < 32; i += 4) {
  81                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  82                        kvmppc_get_gpr(vcpu, i),
  83                        kvmppc_get_gpr(vcpu, i+1),
  84                        kvmppc_get_gpr(vcpu, i+2),
  85                        kvmppc_get_gpr(vcpu, i+3));
  86         }
  87 }
  88
  89 #ifdef CONFIG_SPE
  90 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
  91 {
  92         preempt_disable();
  93         enable_kernel_spe();
  94         kvmppc_save_guest_spe(vcpu);
  95         vcpu->arch.shadow_msr &= ~MSR_SPE;
  96         preempt_enable();
  97 }
  98
  99 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
 100 {
 101         preempt_disable();
 102         enable_kernel_spe();
 103         kvmppc_load_guest_spe(vcpu);
 104         vcpu->arch.shadow_msr |= MSR_SPE;
 105         preempt_enable();
 106 }
 107
 108 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 109 {
 110         if (vcpu->arch.shared->msr & MSR_SPE) {
 111                 if (!(vcpu->arch.shadow_msr & MSR_SPE))
 112                         kvmppc_vcpu_enable_spe(vcpu);
 113         } else if (vcpu->arch.shadow_msr & MSR_SPE) {
 114                 kvmppc_vcpu_disable_spe(vcpu);
 115         }
 116 }
 117 #else
 118 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 119 {
 120 }
 121 #endif
 122
 123 /*
 124  * Helper function for "full" MSR writes.  No need to call this if only
 125  * EE/CE/ME/DE/RI are changing.
 126  */
 127 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
 128 {
 129         u32 old_msr = vcpu->arch.shared->msr;
 130
 131 #ifdef CONFIG_KVM_BOOKE_HV
 132         new_msr |= MSR_GS;
 133 #endif
 134
 135         vcpu->arch.shared->msr = new_msr;
 136
 137         kvmppc_mmu_msr_notify(vcpu, old_msr);
 138         kvmppc_vcpu_sync_spe(vcpu);
 139 }
 140
 141 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
 142                                        unsigned int priority)
 143 {
 144         set_bit(priority, &vcpu->arch.pending_exceptions);
 145 }
 146
 147 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
 148                                         ulong dear_flags, ulong esr_flags)
 149 {
 150         vcpu->arch.queued_dear = dear_flags;
 151         vcpu->arch.queued_esr = esr_flags;
 152         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
 153 }
 154
 155 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
 156                                            ulong dear_flags, ulong esr_flags)
 157 {
 158         vcpu->arch.queued_dear = dear_flags;
 159         vcpu->arch.queued_esr = esr_flags;
 160         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 161 }
 162
 163 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
 164                                            ulong esr_flags)
 165 {
 166         vcpu->arch.queued_esr = esr_flags;
 167         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 168 }
 169
 170 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
 171 {
 172         vcpu->arch.queued_esr = esr_flags;
 173         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 174 }
 175
 176 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 177 {
 178         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
 179 }
 180
 181 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 182 {
 183         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 184 }
 185
 186 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 187 {
 188         clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 189 }
 190
 191 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 192                                 struct kvm_interrupt *irq)
 193 {
 194         unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
 195
 196         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 197                 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
 198
 199         kvmppc_booke_queue_irqprio(vcpu, prio);
 200 }
 201
 202 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
 203                                   struct kvm_interrupt *irq)
 204 {
 205         clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
 206         clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
 207 }
 208
 209 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 210 {
 211 #ifdef CONFIG_KVM_BOOKE_HV
 212         mtspr(SPRN_GSRR0, srr0);
 213         mtspr(SPRN_GSRR1, srr1);
 214 #else
 215         vcpu->arch.shared->srr0 = srr0;
 216         vcpu->arch.shared->srr1 = srr1;
 217 #endif
 218 }
 219
 220 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 221 {
 222         vcpu->arch.csrr0 = srr0;
 223         vcpu->arch.csrr1 = srr1;
 224 }
 225
 226 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 227 {
 228         if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
 229                 vcpu->arch.dsrr0 = srr0;
 230                 vcpu->arch.dsrr1 = srr1;
 231         } else {
 232                 set_guest_csrr(vcpu, srr0, srr1);
 233         }
 234 }
 235
 236 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 237 {
 238         vcpu->arch.mcsrr0 = srr0;
 239         vcpu->arch.mcsrr1 = srr1;
 240 }
 241
 242 static unsigned long get_guest_dear(struct kvm_vcpu *vcpu)
 243 {
 244 #ifdef CONFIG_KVM_BOOKE_HV
 245         return mfspr(SPRN_GDEAR);
 246 #else
 247         return vcpu->arch.shared->dar;
 248 #endif
 249 }
 250
 251 static void set_guest_dear(struct kvm_vcpu *vcpu, unsigned long dear)
 252 {
 253 #ifdef CONFIG_KVM_BOOKE_HV
 254         mtspr(SPRN_GDEAR, dear);
 255 #else
 256         vcpu->arch.shared->dar = dear;
 257 #endif
 258 }
 259
 260 static unsigned long get_guest_esr(struct kvm_vcpu *vcpu)
 261 {
 262 #ifdef CONFIG_KVM_BOOKE_HV
 263         return mfspr(SPRN_GESR);
 264 #else
 265         return vcpu->arch.shared->esr;
 266 #endif
 267 }
 268
 269 static void set_guest_esr(struct kvm_vcpu *vcpu, u32 esr)
 270 {
 271 #ifdef CONFIG_KVM_BOOKE_HV
 272         mtspr(SPRN_GESR, esr);
 273 #else
 274         vcpu->arch.shared->esr = esr;
 275 #endif
 276 }
 277
 278 /* Deliver the interrupt of the corresponding priority, if possible. */
 279 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 280                                         unsigned int priority)
 281 {
 282         int allowed = 0;
 283         ulong uninitialized_var(msr_mask);
 284         bool update_esr = false, update_dear = false;
 285         ulong crit_raw = vcpu->arch.shared->critical;
 286         ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
 287         bool crit;
 288         bool keep_irq = false;
 289         enum int_class int_class;
 290
 291         /* Truncate crit indicators in 32 bit mode */
 292         if (!(vcpu->arch.shared->msr & MSR_SF)) {
 293                 crit_raw &= 0xffffffff;
 294                 crit_r1 &= 0xffffffff;
 295         }
 296
 297         /* Critical section when crit == r1 */
 298         crit = (crit_raw == crit_r1);
 299         /* ... and we're in supervisor mode */
 300         crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 301
 302         if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
 303                 priority = BOOKE_IRQPRIO_EXTERNAL;
 304                 keep_irq = true;
 305         }
 306
 307         switch (priority) {
 308         case BOOKE_IRQPRIO_DTLB_MISS:
 309         case BOOKE_IRQPRIO_DATA_STORAGE:
 310                 update_dear = true;
 311                 /* fall through */
 312         case BOOKE_IRQPRIO_INST_STORAGE:
 313         case BOOKE_IRQPRIO_PROGRAM:
 314                 update_esr = true;
 315                 /* fall through */
 316         case BOOKE_IRQPRIO_ITLB_MISS:
 317         case BOOKE_IRQPRIO_SYSCALL:
 318         case BOOKE_IRQPRIO_FP_UNAVAIL:
 319         case BOOKE_IRQPRIO_SPE_UNAVAIL:
 320         case BOOKE_IRQPRIO_SPE_FP_DATA:
 321         case BOOKE_IRQPRIO_SPE_FP_ROUND:
 322         case BOOKE_IRQPRIO_AP_UNAVAIL:
 323         case BOOKE_IRQPRIO_ALIGNMENT:
 324                 allowed = 1;
 325                 msr_mask = MSR_GS | MSR_CE | MSR_ME | MSR_DE;
 326                 int_class = INT_CLASS_NONCRIT;
 327                 break;
 328         case BOOKE_IRQPRIO_CRITICAL:
 329                 allowed = vcpu->arch.shared->msr & MSR_CE;
 330                 allowed = allowed && !crit;
 331                 msr_mask = MSR_GS | MSR_ME;
 332                 int_class = INT_CLASS_CRIT;
 333                 break;
 334         case BOOKE_IRQPRIO_MACHINE_CHECK:
 335                 allowed = vcpu->arch.shared->msr & MSR_ME;
 336                 allowed = allowed && !crit;
 337                 msr_mask = MSR_GS;
 338                 int_class = INT_CLASS_MC;
 339                 break;
 340         case BOOKE_IRQPRIO_DECREMENTER:
 341         case BOOKE_IRQPRIO_FIT:
 342                 keep_irq = true;
 343                 /* fall through */
 344         case BOOKE_IRQPRIO_EXTERNAL:
 345                 allowed = vcpu->arch.shared->msr & MSR_EE;
 346                 allowed = allowed && !crit;
 347                 msr_mask = MSR_GS | MSR_CE | MSR_ME | MSR_DE;
 348                 int_class = INT_CLASS_NONCRIT;
 349                 break;
 350         case BOOKE_IRQPRIO_DEBUG:
 351                 allowed = vcpu->arch.shared->msr & MSR_DE;
 352                 allowed = allowed && !crit;
 353                 msr_mask = MSR_GS | MSR_ME;
 354                 int_class = INT_CLASS_CRIT;
 355                 break;
 356         }
 357
 358         if (allowed) {
 359                 switch (int_class) {
 360                 case INT_CLASS_NONCRIT:
 361                         set_guest_srr(vcpu, vcpu->arch.pc,
 362                                       vcpu->arch.shared->msr);
 363                         break;
 364                 case INT_CLASS_CRIT:
 365                         set_guest_csrr(vcpu, vcpu->arch.pc,
 366                                        vcpu->arch.shared->msr);
 367                         break;
 368                 case INT_CLASS_DBG:
 369                         set_guest_dsrr(vcpu, vcpu->arch.pc,
 370                                        vcpu->arch.shared->msr);
 371                         break;
 372                 case INT_CLASS_MC:
 373                         set_guest_mcsrr(vcpu, vcpu->arch.pc,
 374                                         vcpu->arch.shared->msr);
 375                         break;
 376                 }
 377
 378                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 379                 if (update_esr == true)
 380                         set_guest_esr(vcpu, vcpu->arch.queued_esr);
 381                 if (update_dear == true)
 382                         set_guest_dear(vcpu, vcpu->arch.queued_dear);
 383                 kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
 384
 385                 if (!keep_irq)
 386                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 387         }
 388
 389 #ifdef CONFIG_KVM_BOOKE_HV
 390         /*
 391          * If an interrupt is pending but masked, raise a guest doorbell
 392          * so that we are notified when the guest enables the relevant
 393          * MSR bit.
 394          */
 395         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
 396                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
 397         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
 398                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
 399         if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
 400                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
 401 #endif
 402
 403         return allowed;
 404 }
 405
 406 static void update_timer_ints(struct kvm_vcpu *vcpu)
 407 {
 408         if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
 409                 kvmppc_core_queue_dec(vcpu);
 410         else
 411                 kvmppc_core_dequeue_dec(vcpu);
 412 }
 413
 414 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
 415 {
 416         unsigned long *pending = &vcpu->arch.pending_exceptions;
 417         unsigned int priority;
 418
 419         if (vcpu->requests) {
 420                 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) {
 421                         smp_mb();
 422                         update_timer_ints(vcpu);
 423                 }
 424         }
 425
 426         priority = __ffs(*pending);
 427         while (priority <= BOOKE_IRQPRIO_MAX) {
 428                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 429                         break;
 430
 431                 priority = find_next_bit(pending,
 432                                          BITS_PER_BYTE * sizeof(*pending),
 433                                          priority + 1);
 434         }
 435
 436         /* Tell the guest about our interrupt status */
 437         vcpu->arch.shared->int_pending = !!*pending;
 438 }
 439
 440 /* Check pending exceptions and deliver one, if possible. */
 441 void kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 442 {
 443         WARN_ON_ONCE(!irqs_disabled());
 444
 445         kvmppc_core_check_exceptions(vcpu);
 446
 447         if (vcpu->arch.shared->msr & MSR_WE) {
 448                 local_irq_enable();
 449                 kvm_vcpu_block(vcpu);
 450                 local_irq_disable();
 451
 452                 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
 453                 kvmppc_core_check_exceptions(vcpu);
 454         };
 455 }
 456
 457 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 458 {
 459         int ret;
 460 #ifdef CONFIG_PPC_FPU
 461         unsigned int fpscr;
 462         int fpexc_mode;
 463         u64 fpr[32];
 464 #endif
 465
 466         if (!vcpu->arch.sane) {
 467                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 468                 return -EINVAL;
 469         }
 470
 471         if (!current->thread.kvm_vcpu) {
 472                 WARN(1, "no vcpu\n");
 473                 return -EPERM;
 474         }
 475
 476         local_irq_disable();
 477
 478         kvmppc_core_prepare_to_enter(vcpu);
 479
 480         if (signal_pending(current)) {
 481                 kvm_run->exit_reason = KVM_EXIT_INTR;
 482                 ret = -EINTR;
 483                 goto out;
 484         }
 485
 486         kvm_guest_enter();
 487
 488 #ifdef CONFIG_PPC_FPU
 489         /* Save userspace FPU state in stack */
 490         enable_kernel_fp();
 491         memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
 492         fpscr = current->thread.fpscr.val;
 493         fpexc_mode = current->thread.fpexc_mode;
 494
 495         /* Restore guest FPU state to thread */
 496         memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr));
 497         current->thread.fpscr.val = vcpu->arch.fpscr;
 498
 499         /*
 500          * Since we can't trap on MSR_FP in GS-mode, we consider the guest
 501          * as always using the FPU.  Kernel usage of FP (via
 502          * enable_kernel_fp()) in this thread must not occur while
 503          * vcpu->fpu_active is set.
 504          */
 505         vcpu->fpu_active = 1;
 506
 507         kvmppc_load_guest_fp(vcpu);
 508 #endif
 509
 510         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
 511
 512 #ifdef CONFIG_PPC_FPU
 513         kvmppc_save_guest_fp(vcpu);
 514
 515         vcpu->fpu_active = 0;
 516
 517         /* Save guest FPU state from thread */
 518         memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr));
 519         vcpu->arch.fpscr = current->thread.fpscr.val;
 520
 521         /* Restore userspace FPU state from stack */
 522         memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
 523         current->thread.fpscr.val = fpscr;
 524         current->thread.fpexc_mode = fpexc_mode;
 525 #endif
 526
 527         kvm_guest_exit();
 528
 529 out:
 530         local_irq_enable();
 531         return ret;
 532 }
 533
 534 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
 535 {
 536         enum emulation_result er;
 537
 538         er = kvmppc_emulate_instruction(run, vcpu);
 539         switch (er) {
 540         case EMULATE_DONE:
 541                 /* don't overwrite subtypes, just account kvm_stats */
 542                 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 543                 /* Future optimization: only reload non-volatiles if
 544                  * they were actually modified by emulation. */
 545                 return RESUME_GUEST_NV;
 546
 547         case EMULATE_DO_DCR:
 548                 run->exit_reason = KVM_EXIT_DCR;
 549                 return RESUME_HOST;
 550
 551         case EMULATE_FAIL:
 552                 /* XXX Deliver Program interrupt to guest. */
 553                 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 554                        __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 555                 /* For debugging, encode the failing instruction and
 556                  * report it to userspace. */
 557                 run->hw.hardware_exit_reason = ~0ULL << 32;
 558                 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 559                 return RESUME_HOST;
 560
 561         default:
 562                 BUG();
 563         }
 564 }
 565
 566 /**
 567  * kvmppc_handle_exit
 568  *
 569  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 570  */
 571 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 572                        unsigned int exit_nr)
 573 {
 574         int r = RESUME_HOST;
 575
 576         /* update before a new last_exit_type is rewritten */
 577         kvmppc_update_timing_stats(vcpu);
 578
 579         switch (exit_nr) {
 580         case BOOKE_INTERRUPT_EXTERNAL:
 581                 do_IRQ(current->thread.regs);
 582                 break;
 583
 584         case BOOKE_INTERRUPT_DECREMENTER:
 585                 timer_interrupt(current->thread.regs);
 586                 break;
 587
 588 #if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64)
 589         case BOOKE_INTERRUPT_DOORBELL:
 590                 doorbell_exception(current->thread.regs);
 591                 break;
 592 #endif
 593         case BOOKE_INTERRUPT_MACHINE_CHECK:
 594                 /* FIXME */
 595                 break;
 596         }
 597
 598         local_irq_enable();
 599
 600         run->exit_reason = KVM_EXIT_UNKNOWN;
 601         run->ready_for_interrupt_injection = 1;
 602
 603         switch (exit_nr) {
 604         case BOOKE_INTERRUPT_MACHINE_CHECK:
 605                 kvm_resched(vcpu);
 606                 r = RESUME_GUEST;
 607                 break;
 608
 609         case BOOKE_INTERRUPT_EXTERNAL:
 610                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 611                 kvm_resched(vcpu);
 612                 r = RESUME_GUEST;
 613                 break;
 614
 615         case BOOKE_INTERRUPT_DECREMENTER:
 616                 kvmppc_account_exit(vcpu, DEC_EXITS);
 617                 kvm_resched(vcpu);
 618                 r = RESUME_GUEST;
 619                 break;
 620
 621         case BOOKE_INTERRUPT_DOORBELL:
 622                 kvmppc_account_exit(vcpu, DBELL_EXITS);
 623                 kvm_resched(vcpu);
 624                 r = RESUME_GUEST;
 625                 break;
 626
 627         case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
 628                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 629
 630                 /*
 631                  * We are here because there is a pending guest interrupt
 632                  * which could not be delivered as MSR_CE or MSR_ME was not
 633                  * set.  Once we break from here we will retry delivery.
 634                  */
 635                 r = RESUME_GUEST;
 636                 break;
 637
 638         case BOOKE_INTERRUPT_GUEST_DBELL:
 639                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 640
 641                 /*
 642                  * We are here because there is a pending guest interrupt
 643                  * which could not be delivered as MSR_EE was not set.  Once
 644                  * we break from here we will retry delivery.
 645                  */
 646                 r = RESUME_GUEST;
 647                 break;
 648
 649         case BOOKE_INTERRUPT_HV_PRIV:
 650                 r = emulation_exit(run, vcpu);
 651                 break;
 652
 653         case BOOKE_INTERRUPT_PROGRAM:
 654                 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
 655                         /* Program traps generated by user-level software must be handled
 656                          * by the guest kernel. */
 657                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
 658                         r = RESUME_GUEST;
 659                         kvmppc_account_exit(vcpu, USR_PR_INST);
 660                         break;
 661                 }
 662
 663                 r = emulation_exit(run, vcpu);
 664                 break;
 665
 666         case BOOKE_INTERRUPT_FP_UNAVAIL:
 667                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 668                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 669                 r = RESUME_GUEST;
 670                 break;
 671
 672 #ifdef CONFIG_SPE
 673         case BOOKE_INTERRUPT_SPE_UNAVAIL: {
 674                 if (vcpu->arch.shared->msr & MSR_SPE)
 675                         kvmppc_vcpu_enable_spe(vcpu);
 676                 else
 677                         kvmppc_booke_queue_irqprio(vcpu,
 678                                                    BOOKE_IRQPRIO_SPE_UNAVAIL);
 679                 r = RESUME_GUEST;
 680                 break;
 681         }
 682
 683         case BOOKE_INTERRUPT_SPE_FP_DATA:
 684                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 685                 r = RESUME_GUEST;
 686                 break;
 687
 688         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 689                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 690                 r = RESUME_GUEST;
 691                 break;
 692 #else
 693         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 694                 /*
 695                  * Guest wants SPE, but host kernel doesn't support it.  Send
 696                  * an "unimplemented operation" program check to the guest.
 697                  */
 698                 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
 699                 r = RESUME_GUEST;
 700                 break;
 701
 702         /*
 703          * These really should never happen without CONFIG_SPE,
 704          * as we should never enable the real MSR[SPE] in the guest.
 705          */
 706         case BOOKE_INTERRUPT_SPE_FP_DATA:
 707         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 708                 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
 709                        __func__, exit_nr, vcpu->arch.pc);
 710                 run->hw.hardware_exit_reason = exit_nr;
 711                 r = RESUME_HOST;
 712                 break;
 713 #endif
 714
 715         case BOOKE_INTERRUPT_DATA_STORAGE:
 716                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
 717                                                vcpu->arch.fault_esr);
 718                 kvmppc_account_exit(vcpu, DSI_EXITS);
 719                 r = RESUME_GUEST;
 720                 break;
 721
 722         case BOOKE_INTERRUPT_INST_STORAGE:
 723                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
 724                 kvmppc_account_exit(vcpu, ISI_EXITS);
 725                 r = RESUME_GUEST;
 726                 break;
 727
 728 #ifdef CONFIG_KVM_BOOKE_HV
 729         case BOOKE_INTERRUPT_HV_SYSCALL:
 730                 if (!(vcpu->arch.shared->msr & MSR_PR)) {
 731                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 732                 } else {
 733                         /*
 734                          * hcall from guest userspace -- send privileged
 735                          * instruction program check.
 736                          */
 737                         kvmppc_core_queue_program(vcpu, ESR_PPR);
 738                 }
 739
 740                 r = RESUME_GUEST;
 741                 break;
 742 #else
 743         case BOOKE_INTERRUPT_SYSCALL:
 744                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
 745                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
 746                         /* KVM PV hypercalls */
 747                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 748                         r = RESUME_GUEST;
 749                 } else {
 750                         /* Guest syscalls */
 751                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 752                 }
 753                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 754                 r = RESUME_GUEST;
 755                 break;
 756 #endif
 757
 758         case BOOKE_INTERRUPT_DTLB_MISS: {
 759                 unsigned long eaddr = vcpu->arch.fault_dear;
 760                 int gtlb_index;
 761                 gpa_t gpaddr;
 762                 gfn_t gfn;
 763
 764 #ifdef CONFIG_KVM_E500
 765                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
 766                     (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
 767                         kvmppc_map_magic(vcpu);
 768                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 769                         r = RESUME_GUEST;
 770
 771                         break;
 772                 }
 773 #endif
 774
 775                 /* Check the guest TLB. */
 776                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
 777                 if (gtlb_index < 0) {
 778                         /* The guest didn't have a mapping for it. */
 779                         kvmppc_core_queue_dtlb_miss(vcpu,
 780                                                     vcpu->arch.fault_dear,
 781                                                     vcpu->arch.fault_esr);
 782                         kvmppc_mmu_dtlb_miss(vcpu);
 783                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 784                         r = RESUME_GUEST;
 785                         break;
 786                 }
 787
 788                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 789                 gfn = gpaddr >> PAGE_SHIFT;
 790
 791                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 792                         /* The guest TLB had a mapping, but the shadow TLB
 793                          * didn't, and it is RAM. This could be because:
 794                          * a) the entry is mapping the host kernel, or
 795                          * b) the guest used a large mapping which we're faking
 796                          * Either way, we need to satisfy the fault without
 797                          * invoking the guest. */
 798                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 799                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 800                         r = RESUME_GUEST;
 801                 } else {
 802                         /* Guest has mapped and accessed a page which is not
 803                          * actually RAM. */
 804                         vcpu->arch.paddr_accessed = gpaddr;
 805                         r = kvmppc_emulate_mmio(run, vcpu);
 806                         kvmppc_account_exit(vcpu, MMIO_EXITS);
 807                 }
 808
 809                 break;
 810         }
 811
 812         case BOOKE_INTERRUPT_ITLB_MISS: {
 813                 unsigned long eaddr = vcpu->arch.pc;
 814                 gpa_t gpaddr;
 815                 gfn_t gfn;
 816                 int gtlb_index;
 817
 818                 r = RESUME_GUEST;
 819
 820                 /* Check the guest TLB. */
 821                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
 822                 if (gtlb_index < 0) {
 823                         /* The guest didn't have a mapping for it. */
 824                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 825                         kvmppc_mmu_itlb_miss(vcpu);
 826                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 827                         break;
 828                 }
 829
 830                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 831
 832                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 833                 gfn = gpaddr >> PAGE_SHIFT;
 834
 835                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 836                         /* The guest TLB had a mapping, but the shadow TLB
 837                          * didn't. This could be because:
 838                          * a) the entry is mapping the host kernel, or
 839                          * b) the guest used a large mapping which we're faking
 840                          * Either way, we need to satisfy the fault without
 841                          * invoking the guest. */
 842                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 843                 } else {
 844                         /* Guest mapped and leaped at non-RAM! */
 845                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 846                 }
 847
 848                 break;
 849         }
 850
 851         case BOOKE_INTERRUPT_DEBUG: {
 852                 u32 dbsr;
 853
 854                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 855
 856                 /* clear IAC events in DBSR register */
 857                 dbsr = mfspr(SPRN_DBSR);
 858                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 859                 mtspr(SPRN_DBSR, dbsr);
 860
 861                 run->exit_reason = KVM_EXIT_DEBUG;
 862                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
 863                 r = RESUME_HOST;
 864                 break;
 865         }
 866
 867         default:
 868                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 869                 BUG();
 870         }
 871
 872         local_irq_disable();
 873
 874         kvmppc_core_prepare_to_enter(vcpu);
 875
 876         if (!(r & RESUME_HOST)) {
 877                 /* To avoid clobbering exit_reason, only check for signals if
 878                  * we aren't already exiting to userspace for some other
 879                  * reason. */
 880                 if (signal_pending(current)) {
 881                         run->exit_reason = KVM_EXIT_INTR;
 882                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 883                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 884                 }
 885         }
 886
 887         return r;
 888 }
 889
 890 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 891 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 892 {
 893         int i;
 894         int r;
 895
 896         vcpu->arch.pc = 0;
 897         vcpu->arch.shared->pir = vcpu->vcpu_id;
 898         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
 899         kvmppc_set_msr(vcpu, 0);
 900
 901 #ifndef CONFIG_KVM_BOOKE_HV
 902         vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
 903         vcpu->arch.shadow_pid = 1;
 904         vcpu->arch.shared->msr = 0;
 905 #endif
 906
 907         /* Eye-catching numbers so we know if the guest takes an interrupt
 908          * before it's programmed its own IVPR/IVORs. */
 909         vcpu->arch.ivpr = 0x55550000;
 910         for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
 911                 vcpu->arch.ivor[i] = 0x7700 | i * 4;
 912
 913         kvmppc_init_timing_stats(vcpu);
 914
 915         r = kvmppc_core_vcpu_setup(vcpu);
 916         kvmppc_sanity_check(vcpu);
 917         return r;
 918 }
 919
 920 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 921 {
 922         int i;
 923
 924         regs->pc = vcpu->arch.pc;
 925         regs->cr = kvmppc_get_cr(vcpu);
 926         regs->ctr = vcpu->arch.ctr;
 927         regs->lr = vcpu->arch.lr;
 928         regs->xer = kvmppc_get_xer(vcpu);
 929         regs->msr = vcpu->arch.shared->msr;
 930         regs->srr0 = vcpu->arch.shared->srr0;
 931         regs->srr1 = vcpu->arch.shared->srr1;
 932         regs->pid = vcpu->arch.pid;
 933         regs->sprg0 = vcpu->arch.shared->sprg0;
 934         regs->sprg1 = vcpu->arch.shared->sprg1;
 935         regs->sprg2 = vcpu->arch.shared->sprg2;
 936         regs->sprg3 = vcpu->arch.shared->sprg3;
 937         regs->sprg4 = vcpu->arch.shared->sprg4;
 938         regs->sprg5 = vcpu->arch.shared->sprg5;
 939         regs->sprg6 = vcpu->arch.shared->sprg6;
 940         regs->sprg7 = vcpu->arch.shared->sprg7;
 941
 942         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 943                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 944
 945         return 0;
 946 }
 947
 948 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 949 {
 950         int i;
 951
 952         vcpu->arch.pc = regs->pc;
 953         kvmppc_set_cr(vcpu, regs->cr);
 954         vcpu->arch.ctr = regs->ctr;
 955         vcpu->arch.lr = regs->lr;
 956         kvmppc_set_xer(vcpu, regs->xer);
 957         kvmppc_set_msr(vcpu, regs->msr);
 958         vcpu->arch.shared->srr0 = regs->srr0;
 959         vcpu->arch.shared->srr1 = regs->srr1;
 960         kvmppc_set_pid(vcpu, regs->pid);
 961         vcpu->arch.shared->sprg0 = regs->sprg0;
 962         vcpu->arch.shared->sprg1 = regs->sprg1;
 963         vcpu->arch.shared->sprg2 = regs->sprg2;
 964         vcpu->arch.shared->sprg3 = regs->sprg3;
 965         vcpu->arch.shared->sprg4 = regs->sprg4;
 966         vcpu->arch.shared->sprg5 = regs->sprg5;
 967         vcpu->arch.shared->sprg6 = regs->sprg6;
 968         vcpu->arch.shared->sprg7 = regs->sprg7;
 969
 970         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 971                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 972
 973         return 0;
 974 }
 975
 976 static void get_sregs_base(struct kvm_vcpu *vcpu,
 977                            struct kvm_sregs *sregs)
 978 {
 979         u64 tb = get_tb();
 980
 981         sregs->u.e.features |= KVM_SREGS_E_BASE;
 982
 983         sregs->u.e.csrr0 = vcpu->arch.csrr0;
 984         sregs->u.e.csrr1 = vcpu->arch.csrr1;
 985         sregs->u.e.mcsr = vcpu->arch.mcsr;
 986         sregs->u.e.esr = get_guest_esr(vcpu);
 987         sregs->u.e.dear = get_guest_dear(vcpu);
 988         sregs->u.e.tsr = vcpu->arch.tsr;
 989         sregs->u.e.tcr = vcpu->arch.tcr;
 990         sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
 991         sregs->u.e.tb = tb;
 992         sregs->u.e.vrsave = vcpu->arch.vrsave;
 993 }
 994
 995 static int set_sregs_base(struct kvm_vcpu *vcpu,
 996                           struct kvm_sregs *sregs)
 997 {
 998         if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
 999                 return 0;
1000
1001         vcpu->arch.csrr0 = sregs->u.e.csrr0;
1002         vcpu->arch.csrr1 = sregs->u.e.csrr1;
1003         vcpu->arch.mcsr = sregs->u.e.mcsr;
1004         set_guest_esr(vcpu, sregs->u.e.esr);
1005         set_guest_dear(vcpu, sregs->u.e.dear);
1006         vcpu->arch.vrsave = sregs->u.e.vrsave;
1007         kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1008
1009         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1010                 vcpu->arch.dec = sregs->u.e.dec;
1011                 kvmppc_emulate_dec(vcpu);
1012         }
1013
1014         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) {
1015                 vcpu->arch.tsr = sregs->u.e.tsr;
1016                 update_timer_ints(vcpu);
1017         }
1018
1019         return 0;
1020 }
1021
1022 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1023                               struct kvm_sregs *sregs)
1024 {
1025         sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1026
1027         sregs->u.e.pir = vcpu->vcpu_id;
1028         sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1029         sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1030         sregs->u.e.decar = vcpu->arch.decar;
1031         sregs->u.e.ivpr = vcpu->arch.ivpr;
1032 }
1033
1034 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1035                              struct kvm_sregs *sregs)
1036 {
1037         if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1038                 return 0;
1039
1040         if (sregs->u.e.pir != vcpu->vcpu_id)
1041                 return -EINVAL;
1042
1043         vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1044         vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1045         vcpu->arch.decar = sregs->u.e.decar;
1046         vcpu->arch.ivpr = sregs->u.e.ivpr;
1047
1048         return 0;
1049 }
1050
1051 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1052 {
1053         sregs->u.e.features |= KVM_SREGS_E_IVOR;
1054
1055         sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1056         sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1057         sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1058         sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1059         sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1060         sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1061         sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1062         sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1063         sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1064         sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1065         sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1066         sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1067         sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1068         sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1069         sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1070         sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1071 }
1072
1073 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1074 {
1075         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1076                 return 0;
1077
1078         vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1079         vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1080         vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1081         vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1082         vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1083         vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1084         vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1085         vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1086         vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1087         vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1088         vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1089         vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1090         vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1091         vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1092         vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1093         vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1094
1095         return 0;
1096 }
1097
1098 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1099                                   struct kvm_sregs *sregs)
1100 {
1101         sregs->pvr = vcpu->arch.pvr;
1102
1103         get_sregs_base(vcpu, sregs);
1104         get_sregs_arch206(vcpu, sregs);
1105         kvmppc_core_get_sregs(vcpu, sregs);
1106         return 0;
1107 }
1108
1109 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1110                                   struct kvm_sregs *sregs)
1111 {
1112         int ret;
1113
1114         if (vcpu->arch.pvr != sregs->pvr)
1115                 return -EINVAL;
1116
1117         ret = set_sregs_base(vcpu, sregs);
1118         if (ret < 0)
1119                 return ret;
1120
1121         ret = set_sregs_arch206(vcpu, sregs);
1122         if (ret < 0)
1123                 return ret;
1124
1125         return kvmppc_core_set_sregs(vcpu, sregs);
1126 }
1127
1128 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1129 {
1130         return -EINVAL;
1131 }
1132
1133 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1134 {
1135         return -EINVAL;
1136 }
1137
1138 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1139 {
1140         return -ENOTSUPP;
1141 }
1142
1143 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1144 {
1145         return -ENOTSUPP;
1146 }
1147
1148 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1149                                   struct kvm_translation *tr)
1150 {
1151         int r;
1152
1153         r = kvmppc_core_vcpu_translate(vcpu, tr);
1154         return r;
1155 }
1156
1157 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1158 {
1159         return -ENOTSUPP;
1160 }
1161
1162 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1163                                       struct kvm_userspace_memory_region *mem)
1164 {
1165         return 0;
1166 }
1167
1168 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1169                                 struct kvm_userspace_memory_region *mem)
1170 {
1171 }
1172
1173 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1174 {
1175         vcpu->arch.tcr = new_tcr;
1176         update_timer_ints(vcpu);
1177 }
1178
1179 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1180 {
1181         set_bits(tsr_bits, &vcpu->arch.tsr);
1182         smp_wmb();
1183         kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1184         kvm_vcpu_kick(vcpu);
1185 }
1186
1187 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1188 {
1189         clear_bits(tsr_bits, &vcpu->arch.tsr);
1190         update_timer_ints(vcpu);
1191 }
1192
1193 void kvmppc_decrementer_func(unsigned long data)
1194 {
1195         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
1196
1197         kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1198 }
1199
1200 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1201 {
1202         current->thread.kvm_vcpu = vcpu;
1203 }
1204
1205 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
1206 {
1207         current->thread.kvm_vcpu = NULL;
1208 }
1209
1210 int __init kvmppc_booke_init(void)
1211 {
1212 #ifndef CONFIG_KVM_BOOKE_HV
1213         unsigned long ivor[16];
1214         unsigned long max_ivor = 0;
1215         int i;
1216
1217         /* We install our own exception handlers by hijacking IVPR. IVPR must
1218          * be 16-bit aligned, so we need a 64KB allocation. */
1219         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
1220                                                  VCPU_SIZE_ORDER);
1221         if (!kvmppc_booke_handlers)
1222                 return -ENOMEM;
1223
1224         /* XXX make sure our handlers are smaller than Linux's */
1225
1226         /* Copy our interrupt handlers to match host IVORs. That way we don't
1227          * have to swap the IVORs on every guest/host transition. */
1228         ivor[0] = mfspr(SPRN_IVOR0);
1229         ivor[1] = mfspr(SPRN_IVOR1);
1230         ivor[2] = mfspr(SPRN_IVOR2);
1231         ivor[3] = mfspr(SPRN_IVOR3);
1232         ivor[4] = mfspr(SPRN_IVOR4);
1233         ivor[5] = mfspr(SPRN_IVOR5);
1234         ivor[6] = mfspr(SPRN_IVOR6);
1235         ivor[7] = mfspr(SPRN_IVOR7);
1236         ivor[8] = mfspr(SPRN_IVOR8);
1237         ivor[9] = mfspr(SPRN_IVOR9);
1238         ivor[10] = mfspr(SPRN_IVOR10);
1239         ivor[11] = mfspr(SPRN_IVOR11);
1240         ivor[12] = mfspr(SPRN_IVOR12);
1241         ivor[13] = mfspr(SPRN_IVOR13);
1242         ivor[14] = mfspr(SPRN_IVOR14);
1243         ivor[15] = mfspr(SPRN_IVOR15);
1244
1245         for (i = 0; i < 16; i++) {
1246                 if (ivor[i] > max_ivor)
1247                         max_ivor = ivor[i];
1248
1249                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
1250                        kvmppc_handlers_start + i * kvmppc_handler_len,
1251                        kvmppc_handler_len);
1252         }
1253         flush_icache_range(kvmppc_booke_handlers,
1254                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
1255 #endif /* !BOOKE_HV */
1256         return 0;
1257 }
1258
1259 void __exit kvmppc_booke_exit(void)
1260 {
1261         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
1262         kvm_exit();
1263 }