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 msr_mask = 0;
 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_CE | MSR_ME | MSR_DE;
 326                 int_class = INT_CLASS_NONCRIT;
 327                 break;
 328         case BOOKE_IRQPRIO_CRITICAL:
 329         case BOOKE_IRQPRIO_DBELL_CRIT:
 330                 allowed = vcpu->arch.shared->msr & MSR_CE;
 331                 allowed = allowed && !crit;
 332                 msr_mask = MSR_ME;
 333                 int_class = INT_CLASS_CRIT;
 334                 break;
 335         case BOOKE_IRQPRIO_MACHINE_CHECK:
 336                 allowed = vcpu->arch.shared->msr & MSR_ME;
 337                 allowed = allowed && !crit;
 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         case BOOKE_IRQPRIO_DBELL:
 346                 allowed = vcpu->arch.shared->msr & MSR_EE;
 347                 allowed = allowed && !crit;
 348                 msr_mask = MSR_CE | MSR_ME | MSR_DE;
 349                 int_class = INT_CLASS_NONCRIT;
 350                 break;
 351         case BOOKE_IRQPRIO_DEBUG:
 352                 allowed = vcpu->arch.shared->msr & MSR_DE;
 353                 allowed = allowed && !crit;
 354                 msr_mask = MSR_ME;
 355                 int_class = INT_CLASS_CRIT;
 356                 break;
 357         }
 358
 359         if (allowed) {
 360                 switch (int_class) {
 361                 case INT_CLASS_NONCRIT:
 362                         set_guest_srr(vcpu, vcpu->arch.pc,
 363                                       vcpu->arch.shared->msr);
 364                         break;
 365                 case INT_CLASS_CRIT:
 366                         set_guest_csrr(vcpu, vcpu->arch.pc,
 367                                        vcpu->arch.shared->msr);
 368                         break;
 369                 case INT_CLASS_DBG:
 370                         set_guest_dsrr(vcpu, vcpu->arch.pc,
 371                                        vcpu->arch.shared->msr);
 372                         break;
 373                 case INT_CLASS_MC:
 374                         set_guest_mcsrr(vcpu, vcpu->arch.pc,
 375                                         vcpu->arch.shared->msr);
 376                         break;
 377                 }
 378
 379                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 380                 if (update_esr == true)
 381                         set_guest_esr(vcpu, vcpu->arch.queued_esr);
 382                 if (update_dear == true)
 383                         set_guest_dear(vcpu, vcpu->arch.queued_dear);
 384                 kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
 385
 386                 if (!keep_irq)
 387                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 388         }
 389
 390 #ifdef CONFIG_KVM_BOOKE_HV
 391         /*
 392          * If an interrupt is pending but masked, raise a guest doorbell
 393          * so that we are notified when the guest enables the relevant
 394          * MSR bit.
 395          */
 396         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
 397                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
 398         if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
 399                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
 400         if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
 401                 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
 402 #endif
 403
 404         return allowed;
 405 }
 406
 407 static void update_timer_ints(struct kvm_vcpu *vcpu)
 408 {
 409         if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
 410                 kvmppc_core_queue_dec(vcpu);
 411         else
 412                 kvmppc_core_dequeue_dec(vcpu);
 413 }
 414
 415 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
 416 {
 417         unsigned long *pending = &vcpu->arch.pending_exceptions;
 418         unsigned int priority;
 419
 420         if (vcpu->requests) {
 421                 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) {
 422                         smp_mb();
 423                         update_timer_ints(vcpu);
 424                 }
 425         }
 426
 427         priority = __ffs(*pending);
 428         while (priority < BOOKE_IRQPRIO_MAX) {
 429                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 430                         break;
 431
 432                 priority = find_next_bit(pending,
 433                                          BITS_PER_BYTE * sizeof(*pending),
 434                                          priority + 1);
 435         }
 436
 437         /* Tell the guest about our interrupt status */
 438         vcpu->arch.shared->int_pending = !!*pending;
 439 }
 440
 441 /* Check pending exceptions and deliver one, if possible. */
 442 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 443 {
 444         int r = 0;
 445         WARN_ON_ONCE(!irqs_disabled());
 446
 447         kvmppc_core_check_exceptions(vcpu);
 448
 449         if (vcpu->arch.shared->msr & MSR_WE) {
 450                 local_irq_enable();
 451                 kvm_vcpu_block(vcpu);
 452                 local_irq_disable();
 453
 454                 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
 455                 r = 1;
 456         };
 457
 458         return r;
 459 }
 460
 461 /*
 462  * Common checks before entering the guest world.  Call with interrupts
 463  * disabled.
 464  *
 465  * returns !0 if a signal is pending and check_signal is true
 466  */
 467 static int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
 468 {
 469         int r = 0;
 470
 471         WARN_ON_ONCE(!irqs_disabled());
 472         while (true) {
 473                 if (need_resched()) {
 474                         local_irq_enable();
 475                         cond_resched();
 476                         local_irq_disable();
 477                         continue;
 478                 }
 479
 480                 if (signal_pending(current)) {
 481                         r = 1;
 482                         break;
 483                 }
 484
 485                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 486                         /* interrupts got enabled in between, so we
 487                            are back at square 1 */
 488                         continue;
 489                 }
 490
 491                 break;
 492         }
 493
 494         return r;
 495 }
 496
 497 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 498 {
 499         int ret;
 500 #ifdef CONFIG_PPC_FPU
 501         unsigned int fpscr;
 502         int fpexc_mode;
 503         u64 fpr[32];
 504 #endif
 505
 506         if (!vcpu->arch.sane) {
 507                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 508                 return -EINVAL;
 509         }
 510
 511         local_irq_disable();
 512         if (kvmppc_prepare_to_enter(vcpu)) {
 513                 kvm_run->exit_reason = KVM_EXIT_INTR;
 514                 ret = -EINTR;
 515                 goto out;
 516         }
 517
 518         kvm_guest_enter();
 519
 520 #ifdef CONFIG_PPC_FPU
 521         /* Save userspace FPU state in stack */
 522         enable_kernel_fp();
 523         memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
 524         fpscr = current->thread.fpscr.val;
 525         fpexc_mode = current->thread.fpexc_mode;
 526
 527         /* Restore guest FPU state to thread */
 528         memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr));
 529         current->thread.fpscr.val = vcpu->arch.fpscr;
 530
 531         /*
 532          * Since we can't trap on MSR_FP in GS-mode, we consider the guest
 533          * as always using the FPU.  Kernel usage of FP (via
 534          * enable_kernel_fp()) in this thread must not occur while
 535          * vcpu->fpu_active is set.
 536          */
 537         vcpu->fpu_active = 1;
 538
 539         kvmppc_load_guest_fp(vcpu);
 540 #endif
 541
 542         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
 543
 544 #ifdef CONFIG_PPC_FPU
 545         kvmppc_save_guest_fp(vcpu);
 546
 547         vcpu->fpu_active = 0;
 548
 549         /* Save guest FPU state from thread */
 550         memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr));
 551         vcpu->arch.fpscr = current->thread.fpscr.val;
 552
 553         /* Restore userspace FPU state from stack */
 554         memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
 555         current->thread.fpscr.val = fpscr;
 556         current->thread.fpexc_mode = fpexc_mode;
 557 #endif
 558
 559         kvm_guest_exit();
 560
 561 out:
 562         local_irq_enable();
 563         return ret;
 564 }
 565
 566 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
 567 {
 568         enum emulation_result er;
 569
 570         er = kvmppc_emulate_instruction(run, vcpu);
 571         switch (er) {
 572         case EMULATE_DONE:
 573                 /* don't overwrite subtypes, just account kvm_stats */
 574                 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 575                 /* Future optimization: only reload non-volatiles if
 576                  * they were actually modified by emulation. */
 577                 return RESUME_GUEST_NV;
 578
 579         case EMULATE_DO_DCR:
 580                 run->exit_reason = KVM_EXIT_DCR;
 581                 return RESUME_HOST;
 582
 583         case EMULATE_FAIL:
 584                 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 585                        __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 586                 /* For debugging, encode the failing instruction and
 587                  * report it to userspace. */
 588                 run->hw.hardware_exit_reason = ~0ULL << 32;
 589                 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 590                 kvmppc_core_queue_program(vcpu, ESR_PIL);
 591                 return RESUME_HOST;
 592
 593         default:
 594                 BUG();
 595         }
 596 }
 597
 598 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
 599 {
 600         ulong r1, ip, msr, lr;
 601
 602         asm("mr %0, 1" : "=r"(r1));
 603         asm("mflr %0" : "=r"(lr));
 604         asm("mfmsr %0" : "=r"(msr));
 605         asm("bl 1f; 1: mflr %0" : "=r"(ip));
 606
 607         memset(regs, 0, sizeof(*regs));
 608         regs->gpr[1] = r1;
 609         regs->nip = ip;
 610         regs->msr = msr;
 611         regs->link = lr;
 612 }
 613
 614 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
 615                                      unsigned int exit_nr)
 616 {
 617         struct pt_regs regs;
 618
 619         switch (exit_nr) {
 620         case BOOKE_INTERRUPT_EXTERNAL:
 621                 kvmppc_fill_pt_regs(&regs);
 622                 do_IRQ(&regs);
 623                 break;
 624         case BOOKE_INTERRUPT_DECREMENTER:
 625                 kvmppc_fill_pt_regs(&regs);
 626                 timer_interrupt(&regs);
 627                 break;
 628 #if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64)
 629         case BOOKE_INTERRUPT_DOORBELL:
 630                 kvmppc_fill_pt_regs(&regs);
 631                 doorbell_exception(&regs);
 632                 break;
 633 #endif
 634         case BOOKE_INTERRUPT_MACHINE_CHECK:
 635                 /* FIXME */
 636                 break;
 637         case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
 638                 kvmppc_fill_pt_regs(&regs);
 639                 performance_monitor_exception(&regs);
 640                 break;
 641         }
 642 }
 643
 644 /**
 645  * kvmppc_handle_exit
 646  *
 647  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 648  */
 649 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 650                        unsigned int exit_nr)
 651 {
 652         int r = RESUME_HOST;
 653
 654         /* update before a new last_exit_type is rewritten */
 655         kvmppc_update_timing_stats(vcpu);
 656
 657         /* restart interrupts if they were meant for the host */
 658         kvmppc_restart_interrupt(vcpu, exit_nr);
 659
 660         local_irq_enable();
 661
 662         run->exit_reason = KVM_EXIT_UNKNOWN;
 663         run->ready_for_interrupt_injection = 1;
 664
 665         switch (exit_nr) {
 666         case BOOKE_INTERRUPT_MACHINE_CHECK:
 667                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 668                 kvmppc_dump_vcpu(vcpu);
 669                 /* For debugging, send invalid exit reason to user space */
 670                 run->hw.hardware_exit_reason = ~1ULL << 32;
 671                 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
 672                 r = RESUME_HOST;
 673                 break;
 674
 675         case BOOKE_INTERRUPT_EXTERNAL:
 676                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 677                 r = RESUME_GUEST;
 678                 break;
 679
 680         case BOOKE_INTERRUPT_DECREMENTER:
 681                 kvmppc_account_exit(vcpu, DEC_EXITS);
 682                 r = RESUME_GUEST;
 683                 break;
 684
 685         case BOOKE_INTERRUPT_DOORBELL:
 686                 kvmppc_account_exit(vcpu, DBELL_EXITS);
 687                 r = RESUME_GUEST;
 688                 break;
 689
 690         case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
 691                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 692
 693                 /*
 694                  * We are here because there is a pending guest interrupt
 695                  * which could not be delivered as MSR_CE or MSR_ME was not
 696                  * set.  Once we break from here we will retry delivery.
 697                  */
 698                 r = RESUME_GUEST;
 699                 break;
 700
 701         case BOOKE_INTERRUPT_GUEST_DBELL:
 702                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 703
 704                 /*
 705                  * We are here because there is a pending guest interrupt
 706                  * which could not be delivered as MSR_EE was not set.  Once
 707                  * we break from here we will retry delivery.
 708                  */
 709                 r = RESUME_GUEST;
 710                 break;
 711
 712         case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
 713                 r = RESUME_GUEST;
 714                 break;
 715
 716         case BOOKE_INTERRUPT_HV_PRIV:
 717                 r = emulation_exit(run, vcpu);
 718                 break;
 719
 720         case BOOKE_INTERRUPT_PROGRAM:
 721                 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
 722                         /*
 723                          * Program traps generated by user-level software must
 724                          * be handled by the guest kernel.
 725                          *
 726                          * In GS mode, hypervisor privileged instructions trap
 727                          * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
 728                          * actual program interrupts, handled by the guest.
 729                          */
 730                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
 731                         r = RESUME_GUEST;
 732                         kvmppc_account_exit(vcpu, USR_PR_INST);
 733                         break;
 734                 }
 735
 736                 r = emulation_exit(run, vcpu);
 737                 break;
 738
 739         case BOOKE_INTERRUPT_FP_UNAVAIL:
 740                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 741                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 742                 r = RESUME_GUEST;
 743                 break;
 744
 745 #ifdef CONFIG_SPE
 746         case BOOKE_INTERRUPT_SPE_UNAVAIL: {
 747                 if (vcpu->arch.shared->msr & MSR_SPE)
 748                         kvmppc_vcpu_enable_spe(vcpu);
 749                 else
 750                         kvmppc_booke_queue_irqprio(vcpu,
 751                                                    BOOKE_IRQPRIO_SPE_UNAVAIL);
 752                 r = RESUME_GUEST;
 753                 break;
 754         }
 755
 756         case BOOKE_INTERRUPT_SPE_FP_DATA:
 757                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 758                 r = RESUME_GUEST;
 759                 break;
 760
 761         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 762                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 763                 r = RESUME_GUEST;
 764                 break;
 765 #else
 766         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 767                 /*
 768                  * Guest wants SPE, but host kernel doesn't support it.  Send
 769                  * an "unimplemented operation" program check to the guest.
 770                  */
 771                 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
 772                 r = RESUME_GUEST;
 773                 break;
 774
 775         /*
 776          * These really should never happen without CONFIG_SPE,
 777          * as we should never enable the real MSR[SPE] in the guest.
 778          */
 779         case BOOKE_INTERRUPT_SPE_FP_DATA:
 780         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 781                 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
 782                        __func__, exit_nr, vcpu->arch.pc);
 783                 run->hw.hardware_exit_reason = exit_nr;
 784                 r = RESUME_HOST;
 785                 break;
 786 #endif
 787
 788         case BOOKE_INTERRUPT_DATA_STORAGE:
 789                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
 790                                                vcpu->arch.fault_esr);
 791                 kvmppc_account_exit(vcpu, DSI_EXITS);
 792                 r = RESUME_GUEST;
 793                 break;
 794
 795         case BOOKE_INTERRUPT_INST_STORAGE:
 796                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
 797                 kvmppc_account_exit(vcpu, ISI_EXITS);
 798                 r = RESUME_GUEST;
 799                 break;
 800
 801 #ifdef CONFIG_KVM_BOOKE_HV
 802         case BOOKE_INTERRUPT_HV_SYSCALL:
 803                 if (!(vcpu->arch.shared->msr & MSR_PR)) {
 804                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 805                 } else {
 806                         /*
 807                          * hcall from guest userspace -- send privileged
 808                          * instruction program check.
 809                          */
 810                         kvmppc_core_queue_program(vcpu, ESR_PPR);
 811                 }
 812
 813                 r = RESUME_GUEST;
 814                 break;
 815 #else
 816         case BOOKE_INTERRUPT_SYSCALL:
 817                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
 818                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
 819                         /* KVM PV hypercalls */
 820                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 821                         r = RESUME_GUEST;
 822                 } else {
 823                         /* Guest syscalls */
 824                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 825                 }
 826                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 827                 r = RESUME_GUEST;
 828                 break;
 829 #endif
 830
 831         case BOOKE_INTERRUPT_DTLB_MISS: {
 832                 unsigned long eaddr = vcpu->arch.fault_dear;
 833                 int gtlb_index;
 834                 gpa_t gpaddr;
 835                 gfn_t gfn;
 836
 837 #ifdef CONFIG_KVM_E500V2
 838                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
 839                     (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
 840                         kvmppc_map_magic(vcpu);
 841                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 842                         r = RESUME_GUEST;
 843
 844                         break;
 845                 }
 846 #endif
 847
 848                 /* Check the guest TLB. */
 849                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
 850                 if (gtlb_index < 0) {
 851                         /* The guest didn't have a mapping for it. */
 852                         kvmppc_core_queue_dtlb_miss(vcpu,
 853                                                     vcpu->arch.fault_dear,
 854                                                     vcpu->arch.fault_esr);
 855                         kvmppc_mmu_dtlb_miss(vcpu);
 856                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 857                         r = RESUME_GUEST;
 858                         break;
 859                 }
 860
 861                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 862                 gfn = gpaddr >> PAGE_SHIFT;
 863
 864                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 865                         /* The guest TLB had a mapping, but the shadow TLB
 866                          * didn't, and it is RAM. This could be because:
 867                          * a) the entry is mapping the host kernel, or
 868                          * b) the guest used a large mapping which we're faking
 869                          * Either way, we need to satisfy the fault without
 870                          * invoking the guest. */
 871                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 872                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 873                         r = RESUME_GUEST;
 874                 } else {
 875                         /* Guest has mapped and accessed a page which is not
 876                          * actually RAM. */
 877                         vcpu->arch.paddr_accessed = gpaddr;
 878                         r = kvmppc_emulate_mmio(run, vcpu);
 879                         kvmppc_account_exit(vcpu, MMIO_EXITS);
 880                 }
 881
 882                 break;
 883         }
 884
 885         case BOOKE_INTERRUPT_ITLB_MISS: {
 886                 unsigned long eaddr = vcpu->arch.pc;
 887                 gpa_t gpaddr;
 888                 gfn_t gfn;
 889                 int gtlb_index;
 890
 891                 r = RESUME_GUEST;
 892
 893                 /* Check the guest TLB. */
 894                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
 895                 if (gtlb_index < 0) {
 896                         /* The guest didn't have a mapping for it. */
 897                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 898                         kvmppc_mmu_itlb_miss(vcpu);
 899                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 900                         break;
 901                 }
 902
 903                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 904
 905                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 906                 gfn = gpaddr >> PAGE_SHIFT;
 907
 908                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 909                         /* The guest TLB had a mapping, but the shadow TLB
 910                          * didn't. This could be because:
 911                          * a) the entry is mapping the host kernel, or
 912                          * b) the guest used a large mapping which we're faking
 913                          * Either way, we need to satisfy the fault without
 914                          * invoking the guest. */
 915                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 916                 } else {
 917                         /* Guest mapped and leaped at non-RAM! */
 918                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 919                 }
 920
 921                 break;
 922         }
 923
 924         case BOOKE_INTERRUPT_DEBUG: {
 925                 u32 dbsr;
 926
 927                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 928
 929                 /* clear IAC events in DBSR register */
 930                 dbsr = mfspr(SPRN_DBSR);
 931                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 932                 mtspr(SPRN_DBSR, dbsr);
 933
 934                 run->exit_reason = KVM_EXIT_DEBUG;
 935                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
 936                 r = RESUME_HOST;
 937                 break;
 938         }
 939
 940         default:
 941                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 942                 BUG();
 943         }
 944
 945         /*
 946          * To avoid clobbering exit_reason, only check for signals if we
 947          * aren't already exiting to userspace for some other reason.
 948          */
 949         if (!(r & RESUME_HOST)) {
 950                 local_irq_disable();
 951                 if (kvmppc_prepare_to_enter(vcpu)) {
 952                         run->exit_reason = KVM_EXIT_INTR;
 953                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 954                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 955                 }
 956         }
 957
 958         return r;
 959 }
 960
 961 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 962 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 963 {
 964         int i;
 965         int r;
 966
 967         vcpu->arch.pc = 0;
 968         vcpu->arch.shared->pir = vcpu->vcpu_id;
 969         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
 970         kvmppc_set_msr(vcpu, 0);
 971
 972 #ifndef CONFIG_KVM_BOOKE_HV
 973         vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
 974         vcpu->arch.shadow_pid = 1;
 975         vcpu->arch.shared->msr = 0;
 976 #endif
 977
 978         /* Eye-catching numbers so we know if the guest takes an interrupt
 979          * before it's programmed its own IVPR/IVORs. */
 980         vcpu->arch.ivpr = 0x55550000;
 981         for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
 982                 vcpu->arch.ivor[i] = 0x7700 | i * 4;
 983
 984         kvmppc_init_timing_stats(vcpu);
 985
 986         r = kvmppc_core_vcpu_setup(vcpu);
 987         kvmppc_sanity_check(vcpu);
 988         return r;
 989 }
 990
 991 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 992 {
 993         int i;
 994
 995         regs->pc = vcpu->arch.pc;
 996         regs->cr = kvmppc_get_cr(vcpu);
 997         regs->ctr = vcpu->arch.ctr;
 998         regs->lr = vcpu->arch.lr;
 999         regs->xer = kvmppc_get_xer(vcpu);
1000         regs->msr = vcpu->arch.shared->msr;
1001         regs->srr0 = vcpu->arch.shared->srr0;
1002         regs->srr1 = vcpu->arch.shared->srr1;
1003         regs->pid = vcpu->arch.pid;
1004         regs->sprg0 = vcpu->arch.shared->sprg0;
1005         regs->sprg1 = vcpu->arch.shared->sprg1;
1006         regs->sprg2 = vcpu->arch.shared->sprg2;
1007         regs->sprg3 = vcpu->arch.shared->sprg3;
1008         regs->sprg4 = vcpu->arch.shared->sprg4;
1009         regs->sprg5 = vcpu->arch.shared->sprg5;
1010         regs->sprg6 = vcpu->arch.shared->sprg6;
1011         regs->sprg7 = vcpu->arch.shared->sprg7;
1012
1013         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1014                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1015
1016         return 0;
1017 }
1018
1019 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1020 {
1021         int i;
1022
1023         vcpu->arch.pc = regs->pc;
1024         kvmppc_set_cr(vcpu, regs->cr);
1025         vcpu->arch.ctr = regs->ctr;
1026         vcpu->arch.lr = regs->lr;
1027         kvmppc_set_xer(vcpu, regs->xer);
1028         kvmppc_set_msr(vcpu, regs->msr);
1029         vcpu->arch.shared->srr0 = regs->srr0;
1030         vcpu->arch.shared->srr1 = regs->srr1;
1031         kvmppc_set_pid(vcpu, regs->pid);
1032         vcpu->arch.shared->sprg0 = regs->sprg0;
1033         vcpu->arch.shared->sprg1 = regs->sprg1;
1034         vcpu->arch.shared->sprg2 = regs->sprg2;
1035         vcpu->arch.shared->sprg3 = regs->sprg3;
1036         vcpu->arch.shared->sprg4 = regs->sprg4;
1037         vcpu->arch.shared->sprg5 = regs->sprg5;
1038         vcpu->arch.shared->sprg6 = regs->sprg6;
1039         vcpu->arch.shared->sprg7 = regs->sprg7;
1040
1041         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1042                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1043
1044         return 0;
1045 }
1046
1047 static void get_sregs_base(struct kvm_vcpu *vcpu,
1048                            struct kvm_sregs *sregs)
1049 {
1050         u64 tb = get_tb();
1051
1052         sregs->u.e.features |= KVM_SREGS_E_BASE;
1053
1054         sregs->u.e.csrr0 = vcpu->arch.csrr0;
1055         sregs->u.e.csrr1 = vcpu->arch.csrr1;
1056         sregs->u.e.mcsr = vcpu->arch.mcsr;
1057         sregs->u.e.esr = get_guest_esr(vcpu);
1058         sregs->u.e.dear = get_guest_dear(vcpu);
1059         sregs->u.e.tsr = vcpu->arch.tsr;
1060         sregs->u.e.tcr = vcpu->arch.tcr;
1061         sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1062         sregs->u.e.tb = tb;
1063         sregs->u.e.vrsave = vcpu->arch.vrsave;
1064 }
1065
1066 static int set_sregs_base(struct kvm_vcpu *vcpu,
1067                           struct kvm_sregs *sregs)
1068 {
1069         if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1070                 return 0;
1071
1072         vcpu->arch.csrr0 = sregs->u.e.csrr0;
1073         vcpu->arch.csrr1 = sregs->u.e.csrr1;
1074         vcpu->arch.mcsr = sregs->u.e.mcsr;
1075         set_guest_esr(vcpu, sregs->u.e.esr);
1076         set_guest_dear(vcpu, sregs->u.e.dear);
1077         vcpu->arch.vrsave = sregs->u.e.vrsave;
1078         kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1079
1080         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1081                 vcpu->arch.dec = sregs->u.e.dec;
1082                 kvmppc_emulate_dec(vcpu);
1083         }
1084
1085         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) {
1086                 vcpu->arch.tsr = sregs->u.e.tsr;
1087                 update_timer_ints(vcpu);
1088         }
1089
1090         return 0;
1091 }
1092
1093 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1094                               struct kvm_sregs *sregs)
1095 {
1096         sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1097
1098         sregs->u.e.pir = vcpu->vcpu_id;
1099         sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1100         sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1101         sregs->u.e.decar = vcpu->arch.decar;
1102         sregs->u.e.ivpr = vcpu->arch.ivpr;
1103 }
1104
1105 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1106                              struct kvm_sregs *sregs)
1107 {
1108         if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1109                 return 0;
1110
1111         if (sregs->u.e.pir != vcpu->vcpu_id)
1112                 return -EINVAL;
1113
1114         vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1115         vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1116         vcpu->arch.decar = sregs->u.e.decar;
1117         vcpu->arch.ivpr = sregs->u.e.ivpr;
1118
1119         return 0;
1120 }
1121
1122 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1123 {
1124         sregs->u.e.features |= KVM_SREGS_E_IVOR;
1125
1126         sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1127         sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1128         sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1129         sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1130         sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1131         sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1132         sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1133         sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1134         sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1135         sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1136         sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1137         sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1138         sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1139         sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1140         sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1141         sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1142 }
1143
1144 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1145 {
1146         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1147                 return 0;
1148
1149         vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1150         vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1151         vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1152         vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1153         vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1154         vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1155         vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1156         vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1157         vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1158         vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1159         vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1160         vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1161         vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1162         vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1163         vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1164         vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1165
1166         return 0;
1167 }
1168
1169 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1170                                   struct kvm_sregs *sregs)
1171 {
1172         sregs->pvr = vcpu->arch.pvr;
1173
1174         get_sregs_base(vcpu, sregs);
1175         get_sregs_arch206(vcpu, sregs);
1176         kvmppc_core_get_sregs(vcpu, sregs);
1177         return 0;
1178 }
1179
1180 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1181                                   struct kvm_sregs *sregs)
1182 {
1183         int ret;
1184
1185         if (vcpu->arch.pvr != sregs->pvr)
1186                 return -EINVAL;
1187
1188         ret = set_sregs_base(vcpu, sregs);
1189         if (ret < 0)
1190                 return ret;
1191
1192         ret = set_sregs_arch206(vcpu, sregs);
1193         if (ret < 0)
1194                 return ret;
1195
1196         return kvmppc_core_set_sregs(vcpu, sregs);
1197 }
1198
1199 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1200 {
1201         return -EINVAL;
1202 }
1203
1204 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1205 {
1206         return -EINVAL;
1207 }
1208
1209 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1210 {
1211         return -ENOTSUPP;
1212 }
1213
1214 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1215 {
1216         return -ENOTSUPP;
1217 }
1218
1219 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1220                                   struct kvm_translation *tr)
1221 {
1222         int r;
1223
1224         r = kvmppc_core_vcpu_translate(vcpu, tr);
1225         return r;
1226 }
1227
1228 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1229 {
1230         return -ENOTSUPP;
1231 }
1232
1233 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1234                                       struct kvm_userspace_memory_region *mem)
1235 {
1236         return 0;
1237 }
1238
1239 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1240                                 struct kvm_userspace_memory_region *mem)
1241 {
1242 }
1243
1244 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1245 {
1246         vcpu->arch.tcr = new_tcr;
1247         update_timer_ints(vcpu);
1248 }
1249
1250 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1251 {
1252         set_bits(tsr_bits, &vcpu->arch.tsr);
1253         smp_wmb();
1254         kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1255         kvm_vcpu_kick(vcpu);
1256 }
1257
1258 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1259 {
1260         clear_bits(tsr_bits, &vcpu->arch.tsr);
1261         update_timer_ints(vcpu);
1262 }
1263
1264 void kvmppc_decrementer_func(unsigned long data)
1265 {
1266         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
1267
1268         kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1269 }
1270
1271 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1272 {
1273         current->thread.kvm_vcpu = vcpu;
1274 }
1275
1276 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
1277 {
1278         current->thread.kvm_vcpu = NULL;
1279 }
1280
1281 int __init kvmppc_booke_init(void)
1282 {
1283 #ifndef CONFIG_KVM_BOOKE_HV
1284         unsigned long ivor[16];
1285         unsigned long max_ivor = 0;
1286         int i;
1287
1288         /* We install our own exception handlers by hijacking IVPR. IVPR must
1289          * be 16-bit aligned, so we need a 64KB allocation. */
1290         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
1291                                                  VCPU_SIZE_ORDER);
1292         if (!kvmppc_booke_handlers)
1293                 return -ENOMEM;
1294
1295         /* XXX make sure our handlers are smaller than Linux's */
1296
1297         /* Copy our interrupt handlers to match host IVORs. That way we don't
1298          * have to swap the IVORs on every guest/host transition. */
1299         ivor[0] = mfspr(SPRN_IVOR0);
1300         ivor[1] = mfspr(SPRN_IVOR1);
1301         ivor[2] = mfspr(SPRN_IVOR2);
1302         ivor[3] = mfspr(SPRN_IVOR3);
1303         ivor[4] = mfspr(SPRN_IVOR4);
1304         ivor[5] = mfspr(SPRN_IVOR5);
1305         ivor[6] = mfspr(SPRN_IVOR6);
1306         ivor[7] = mfspr(SPRN_IVOR7);
1307         ivor[8] = mfspr(SPRN_IVOR8);
1308         ivor[9] = mfspr(SPRN_IVOR9);
1309         ivor[10] = mfspr(SPRN_IVOR10);
1310         ivor[11] = mfspr(SPRN_IVOR11);
1311         ivor[12] = mfspr(SPRN_IVOR12);
1312         ivor[13] = mfspr(SPRN_IVOR13);
1313         ivor[14] = mfspr(SPRN_IVOR14);
1314         ivor[15] = mfspr(SPRN_IVOR15);
1315
1316         for (i = 0; i < 16; i++) {
1317                 if (ivor[i] > max_ivor)
1318                         max_ivor = ivor[i];
1319
1320                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
1321                        kvmppc_handlers_start + i * kvmppc_handler_len,
1322                        kvmppc_handler_len);
1323         }
1324         flush_icache_range(kvmppc_booke_handlers,
1325                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
1326 #endif /* !BOOKE_HV */
1327         return 0;
1328 }
1329
1330 void __exit kvmppc_booke_exit(void)
1331 {
1332         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
1333         kvm_exit();
1334 }