Pileus Git - ~andy/linux/blob - 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                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 453                 local_irq_disable();
 454
 455                 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
 456                 r = 1;
 457         };
 458
 459         return r;
 460 }
 461
 462 /*
 463  * Common checks before entering the guest world.  Call with interrupts
 464  * disabled.
 465  *
 466  * returns !0 if a signal is pending and check_signal is true
 467  */
 468 static int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
 469 {
 470         int r = 0;
 471
 472         WARN_ON_ONCE(!irqs_disabled());
 473         while (true) {
 474                 if (need_resched()) {
 475                         local_irq_enable();
 476                         cond_resched();
 477                         local_irq_disable();
 478                         continue;
 479                 }
 480
 481                 if (signal_pending(current)) {
 482                         r = 1;
 483                         break;
 484                 }
 485
 486                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 487                         /* interrupts got enabled in between, so we
 488                            are back at square 1 */
 489                         continue;
 490                 }
 491
 492                 break;
 493         }
 494
 495         return r;
 496 }
 497
 498 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 499 {
 500         int ret;
 501 #ifdef CONFIG_PPC_FPU
 502         unsigned int fpscr;
 503         int fpexc_mode;
 504         u64 fpr[32];
 505 #endif
 506
 507         if (!vcpu->arch.sane) {
 508                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 509                 return -EINVAL;
 510         }
 511
 512         local_irq_disable();
 513         if (kvmppc_prepare_to_enter(vcpu)) {
 514                 kvm_run->exit_reason = KVM_EXIT_INTR;
 515                 ret = -EINTR;
 516                 goto out;
 517         }
 518
 519         kvm_guest_enter();
 520
 521 #ifdef CONFIG_PPC_FPU
 522         /* Save userspace FPU state in stack */
 523         enable_kernel_fp();
 524         memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
 525         fpscr = current->thread.fpscr.val;
 526         fpexc_mode = current->thread.fpexc_mode;
 527
 528         /* Restore guest FPU state to thread */
 529         memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr));
 530         current->thread.fpscr.val = vcpu->arch.fpscr;
 531
 532         /*
 533          * Since we can't trap on MSR_FP in GS-mode, we consider the guest
 534          * as always using the FPU.  Kernel usage of FP (via
 535          * enable_kernel_fp()) in this thread must not occur while
 536          * vcpu->fpu_active is set.
 537          */
 538         vcpu->fpu_active = 1;
 539
 540         kvmppc_load_guest_fp(vcpu);
 541 #endif
 542
 543         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
 544
 545 #ifdef CONFIG_PPC_FPU
 546         kvmppc_save_guest_fp(vcpu);
 547
 548         vcpu->fpu_active = 0;
 549
 550         /* Save guest FPU state from thread */
 551         memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr));
 552         vcpu->arch.fpscr = current->thread.fpscr.val;
 553
 554         /* Restore userspace FPU state from stack */
 555         memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
 556         current->thread.fpscr.val = fpscr;
 557         current->thread.fpexc_mode = fpexc_mode;
 558 #endif
 559
 560         kvm_guest_exit();
 561
 562 out:
 563         local_irq_enable();
 564         return ret;
 565 }
 566
 567 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
 568 {
 569         enum emulation_result er;
 570
 571         er = kvmppc_emulate_instruction(run, vcpu);
 572         switch (er) {
 573         case EMULATE_DONE:
 574                 /* don't overwrite subtypes, just account kvm_stats */
 575                 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 576                 /* Future optimization: only reload non-volatiles if
 577                  * they were actually modified by emulation. */
 578                 return RESUME_GUEST_NV;
 579
 580         case EMULATE_DO_DCR:
 581                 run->exit_reason = KVM_EXIT_DCR;
 582                 return RESUME_HOST;
 583
 584         case EMULATE_FAIL:
 585                 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 586                        __func__, vcpu->arch.pc, vcpu->arch.last_inst);
 587                 /* For debugging, encode the failing instruction and
 588                  * report it to userspace. */
 589                 run->hw.hardware_exit_reason = ~0ULL << 32;
 590                 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 591                 kvmppc_core_queue_program(vcpu, ESR_PIL);
 592                 return RESUME_HOST;
 593
 594         default:
 595                 BUG();
 596         }
 597 }
 598
 599 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
 600 {
 601         ulong r1, ip, msr, lr;
 602
 603         asm("mr %0, 1" : "=r"(r1));
 604         asm("mflr %0" : "=r"(lr));
 605         asm("mfmsr %0" : "=r"(msr));
 606         asm("bl 1f; 1: mflr %0" : "=r"(ip));
 607
 608         memset(regs, 0, sizeof(*regs));
 609         regs->gpr[1] = r1;
 610         regs->nip = ip;
 611         regs->msr = msr;
 612         regs->link = lr;
 613 }
 614
 615 /*
 616  * For interrupts needed to be handled by host interrupt handlers,
 617  * corresponding host handler are called from here in similar way
 618  * (but not exact) as they are called from low level handler
 619  * (such as from arch/powerpc/kernel/head_fsl_booke.S).
 620  */
 621 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
 622                                      unsigned int exit_nr)
 623 {
 624         struct pt_regs regs;
 625
 626         switch (exit_nr) {
 627         case BOOKE_INTERRUPT_EXTERNAL:
 628                 kvmppc_fill_pt_regs(&regs);
 629                 do_IRQ(&regs);
 630                 break;
 631         case BOOKE_INTERRUPT_DECREMENTER:
 632                 kvmppc_fill_pt_regs(&regs);
 633                 timer_interrupt(&regs);
 634                 break;
 635 #if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64)
 636         case BOOKE_INTERRUPT_DOORBELL:
 637                 kvmppc_fill_pt_regs(&regs);
 638                 doorbell_exception(&regs);
 639                 break;
 640 #endif
 641         case BOOKE_INTERRUPT_MACHINE_CHECK:
 642                 /* FIXME */
 643                 break;
 644         case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
 645                 kvmppc_fill_pt_regs(&regs);
 646                 performance_monitor_exception(&regs);
 647                 break;
 648         case BOOKE_INTERRUPT_WATCHDOG:
 649                 kvmppc_fill_pt_regs(&regs);
 650 #ifdef CONFIG_BOOKE_WDT
 651                 WatchdogException(&regs);
 652 #else
 653                 unknown_exception(&regs);
 654 #endif
 655                 break;
 656         case BOOKE_INTERRUPT_CRITICAL:
 657                 unknown_exception(&regs);
 658                 break;
 659         }
 660 }
 661
 662 /**
 663  * kvmppc_handle_exit
 664  *
 665  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 666  */
 667 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 668                        unsigned int exit_nr)
 669 {
 670         int r = RESUME_HOST;
 671
 672         /* update before a new last_exit_type is rewritten */
 673         kvmppc_update_timing_stats(vcpu);
 674
 675         /* restart interrupts if they were meant for the host */
 676         kvmppc_restart_interrupt(vcpu, exit_nr);
 677
 678         local_irq_enable();
 679
 680         run->exit_reason = KVM_EXIT_UNKNOWN;
 681         run->ready_for_interrupt_injection = 1;
 682
 683         switch (exit_nr) {
 684         case BOOKE_INTERRUPT_MACHINE_CHECK:
 685                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
 686                 kvmppc_dump_vcpu(vcpu);
 687                 /* For debugging, send invalid exit reason to user space */
 688                 run->hw.hardware_exit_reason = ~1ULL << 32;
 689                 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
 690                 r = RESUME_HOST;
 691                 break;
 692
 693         case BOOKE_INTERRUPT_EXTERNAL:
 694                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
 695                 r = RESUME_GUEST;
 696                 break;
 697
 698         case BOOKE_INTERRUPT_DECREMENTER:
 699                 kvmppc_account_exit(vcpu, DEC_EXITS);
 700                 r = RESUME_GUEST;
 701                 break;
 702
 703         case BOOKE_INTERRUPT_WATCHDOG:
 704                 r = RESUME_GUEST;
 705                 break;
 706
 707         case BOOKE_INTERRUPT_DOORBELL:
 708                 kvmppc_account_exit(vcpu, DBELL_EXITS);
 709                 r = RESUME_GUEST;
 710                 break;
 711
 712         case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
 713                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 714
 715                 /*
 716                  * We are here because there is a pending guest interrupt
 717                  * which could not be delivered as MSR_CE or MSR_ME was not
 718                  * set.  Once we break from here we will retry delivery.
 719                  */
 720                 r = RESUME_GUEST;
 721                 break;
 722
 723         case BOOKE_INTERRUPT_GUEST_DBELL:
 724                 kvmppc_account_exit(vcpu, GDBELL_EXITS);
 725
 726                 /*
 727                  * We are here because there is a pending guest interrupt
 728                  * which could not be delivered as MSR_EE was not set.  Once
 729                  * we break from here we will retry delivery.
 730                  */
 731                 r = RESUME_GUEST;
 732                 break;
 733
 734         case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
 735                 r = RESUME_GUEST;
 736                 break;
 737
 738         case BOOKE_INTERRUPT_HV_PRIV:
 739                 r = emulation_exit(run, vcpu);
 740                 break;
 741
 742         case BOOKE_INTERRUPT_PROGRAM:
 743                 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
 744                         /*
 745                          * Program traps generated by user-level software must
 746                          * be handled by the guest kernel.
 747                          *
 748                          * In GS mode, hypervisor privileged instructions trap
 749                          * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
 750                          * actual program interrupts, handled by the guest.
 751                          */
 752                         kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
 753                         r = RESUME_GUEST;
 754                         kvmppc_account_exit(vcpu, USR_PR_INST);
 755                         break;
 756                 }
 757
 758                 r = emulation_exit(run, vcpu);
 759                 break;
 760
 761         case BOOKE_INTERRUPT_FP_UNAVAIL:
 762                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 763                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
 764                 r = RESUME_GUEST;
 765                 break;
 766
 767 #ifdef CONFIG_SPE
 768         case BOOKE_INTERRUPT_SPE_UNAVAIL: {
 769                 if (vcpu->arch.shared->msr & MSR_SPE)
 770                         kvmppc_vcpu_enable_spe(vcpu);
 771                 else
 772                         kvmppc_booke_queue_irqprio(vcpu,
 773                                                    BOOKE_IRQPRIO_SPE_UNAVAIL);
 774                 r = RESUME_GUEST;
 775                 break;
 776         }
 777
 778         case BOOKE_INTERRUPT_SPE_FP_DATA:
 779                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
 780                 r = RESUME_GUEST;
 781                 break;
 782
 783         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 784                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
 785                 r = RESUME_GUEST;
 786                 break;
 787 #else
 788         case BOOKE_INTERRUPT_SPE_UNAVAIL:
 789                 /*
 790                  * Guest wants SPE, but host kernel doesn't support it.  Send
 791                  * an "unimplemented operation" program check to the guest.
 792                  */
 793                 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
 794                 r = RESUME_GUEST;
 795                 break;
 796
 797         /*
 798          * These really should never happen without CONFIG_SPE,
 799          * as we should never enable the real MSR[SPE] in the guest.
 800          */
 801         case BOOKE_INTERRUPT_SPE_FP_DATA:
 802         case BOOKE_INTERRUPT_SPE_FP_ROUND:
 803                 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
 804                        __func__, exit_nr, vcpu->arch.pc);
 805                 run->hw.hardware_exit_reason = exit_nr;
 806                 r = RESUME_HOST;
 807                 break;
 808 #endif
 809
 810         case BOOKE_INTERRUPT_DATA_STORAGE:
 811                 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
 812                                                vcpu->arch.fault_esr);
 813                 kvmppc_account_exit(vcpu, DSI_EXITS);
 814                 r = RESUME_GUEST;
 815                 break;
 816
 817         case BOOKE_INTERRUPT_INST_STORAGE:
 818                 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
 819                 kvmppc_account_exit(vcpu, ISI_EXITS);
 820                 r = RESUME_GUEST;
 821                 break;
 822
 823 #ifdef CONFIG_KVM_BOOKE_HV
 824         case BOOKE_INTERRUPT_HV_SYSCALL:
 825                 if (!(vcpu->arch.shared->msr & MSR_PR)) {
 826                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 827                 } else {
 828                         /*
 829                          * hcall from guest userspace -- send privileged
 830                          * instruction program check.
 831                          */
 832                         kvmppc_core_queue_program(vcpu, ESR_PPR);
 833                 }
 834
 835                 r = RESUME_GUEST;
 836                 break;
 837 #else
 838         case BOOKE_INTERRUPT_SYSCALL:
 839                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
 840                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
 841                         /* KVM PV hypercalls */
 842                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 843                         r = RESUME_GUEST;
 844                 } else {
 845                         /* Guest syscalls */
 846                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
 847                 }
 848                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
 849                 r = RESUME_GUEST;
 850                 break;
 851 #endif
 852
 853         case BOOKE_INTERRUPT_DTLB_MISS: {
 854                 unsigned long eaddr = vcpu->arch.fault_dear;
 855                 int gtlb_index;
 856                 gpa_t gpaddr;
 857                 gfn_t gfn;
 858
 859 #ifdef CONFIG_KVM_E500V2
 860                 if (!(vcpu->arch.shared->msr & MSR_PR) &&
 861                     (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
 862                         kvmppc_map_magic(vcpu);
 863                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 864                         r = RESUME_GUEST;
 865
 866                         break;
 867                 }
 868 #endif
 869
 870                 /* Check the guest TLB. */
 871                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
 872                 if (gtlb_index < 0) {
 873                         /* The guest didn't have a mapping for it. */
 874                         kvmppc_core_queue_dtlb_miss(vcpu,
 875                                                     vcpu->arch.fault_dear,
 876                                                     vcpu->arch.fault_esr);
 877                         kvmppc_mmu_dtlb_miss(vcpu);
 878                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
 879                         r = RESUME_GUEST;
 880                         break;
 881                 }
 882
 883                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 884                 gfn = gpaddr >> PAGE_SHIFT;
 885
 886                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 887                         /* The guest TLB had a mapping, but the shadow TLB
 888                          * didn't, and it is RAM. This could be because:
 889                          * a) the entry is mapping the host kernel, or
 890                          * b) the guest used a large mapping which we're faking
 891                          * Either way, we need to satisfy the fault without
 892                          * invoking the guest. */
 893                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 894                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
 895                         r = RESUME_GUEST;
 896                 } else {
 897                         /* Guest has mapped and accessed a page which is not
 898                          * actually RAM. */
 899                         vcpu->arch.paddr_accessed = gpaddr;
 900                         vcpu->arch.vaddr_accessed = eaddr;
 901                         r = kvmppc_emulate_mmio(run, vcpu);
 902                         kvmppc_account_exit(vcpu, MMIO_EXITS);
 903                 }
 904
 905                 break;
 906         }
 907
 908         case BOOKE_INTERRUPT_ITLB_MISS: {
 909                 unsigned long eaddr = vcpu->arch.pc;
 910                 gpa_t gpaddr;
 911                 gfn_t gfn;
 912                 int gtlb_index;
 913
 914                 r = RESUME_GUEST;
 915
 916                 /* Check the guest TLB. */
 917                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
 918                 if (gtlb_index < 0) {
 919                         /* The guest didn't have a mapping for it. */
 920                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 921                         kvmppc_mmu_itlb_miss(vcpu);
 922                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
 923                         break;
 924                 }
 925
 926                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
 927
 928                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
 929                 gfn = gpaddr >> PAGE_SHIFT;
 930
 931                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
 932                         /* The guest TLB had a mapping, but the shadow TLB
 933                          * didn't. This could be because:
 934                          * a) the entry is mapping the host kernel, or
 935                          * b) the guest used a large mapping which we're faking
 936                          * Either way, we need to satisfy the fault without
 937                          * invoking the guest. */
 938                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
 939                 } else {
 940                         /* Guest mapped and leaped at non-RAM! */
 941                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
 942                 }
 943
 944                 break;
 945         }
 946
 947         case BOOKE_INTERRUPT_DEBUG: {
 948                 u32 dbsr;
 949
 950                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
 951
 952                 /* clear IAC events in DBSR register */
 953                 dbsr = mfspr(SPRN_DBSR);
 954                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
 955                 mtspr(SPRN_DBSR, dbsr);
 956
 957                 run->exit_reason = KVM_EXIT_DEBUG;
 958                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
 959                 r = RESUME_HOST;
 960                 break;
 961         }
 962
 963         default:
 964                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
 965                 BUG();
 966         }
 967
 968         /*
 969          * To avoid clobbering exit_reason, only check for signals if we
 970          * aren't already exiting to userspace for some other reason.
 971          */
 972         if (!(r & RESUME_HOST)) {
 973                 local_irq_disable();
 974                 if (kvmppc_prepare_to_enter(vcpu)) {
 975                         run->exit_reason = KVM_EXIT_INTR;
 976                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
 977                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 978                 }
 979         }
 980
 981         return r;
 982 }
 983
 984 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
 985 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 986 {
 987         int i;
 988         int r;
 989
 990         vcpu->arch.pc = 0;
 991         vcpu->arch.shared->pir = vcpu->vcpu_id;
 992         kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
 993         kvmppc_set_msr(vcpu, 0);
 994
 995 #ifndef CONFIG_KVM_BOOKE_HV
 996         vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
 997         vcpu->arch.shadow_pid = 1;
 998         vcpu->arch.shared->msr = 0;
 999 #endif
1000
1001         /* Eye-catching numbers so we know if the guest takes an interrupt
1002          * before it's programmed its own IVPR/IVORs. */
1003         vcpu->arch.ivpr = 0x55550000;
1004         for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
1005                 vcpu->arch.ivor[i] = 0x7700 | i * 4;
1006
1007         kvmppc_init_timing_stats(vcpu);
1008
1009         r = kvmppc_core_vcpu_setup(vcpu);
1010         kvmppc_sanity_check(vcpu);
1011         return r;
1012 }
1013
1014 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1015 {
1016         int i;
1017
1018         regs->pc = vcpu->arch.pc;
1019         regs->cr = kvmppc_get_cr(vcpu);
1020         regs->ctr = vcpu->arch.ctr;
1021         regs->lr = vcpu->arch.lr;
1022         regs->xer = kvmppc_get_xer(vcpu);
1023         regs->msr = vcpu->arch.shared->msr;
1024         regs->srr0 = vcpu->arch.shared->srr0;
1025         regs->srr1 = vcpu->arch.shared->srr1;
1026         regs->pid = vcpu->arch.pid;
1027         regs->sprg0 = vcpu->arch.shared->sprg0;
1028         regs->sprg1 = vcpu->arch.shared->sprg1;
1029         regs->sprg2 = vcpu->arch.shared->sprg2;
1030         regs->sprg3 = vcpu->arch.shared->sprg3;
1031         regs->sprg4 = vcpu->arch.shared->sprg4;
1032         regs->sprg5 = vcpu->arch.shared->sprg5;
1033         regs->sprg6 = vcpu->arch.shared->sprg6;
1034         regs->sprg7 = vcpu->arch.shared->sprg7;
1035
1036         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1037                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1038
1039         return 0;
1040 }
1041
1042 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1043 {
1044         int i;
1045
1046         vcpu->arch.pc = regs->pc;
1047         kvmppc_set_cr(vcpu, regs->cr);
1048         vcpu->arch.ctr = regs->ctr;
1049         vcpu->arch.lr = regs->lr;
1050         kvmppc_set_xer(vcpu, regs->xer);
1051         kvmppc_set_msr(vcpu, regs->msr);
1052         vcpu->arch.shared->srr0 = regs->srr0;
1053         vcpu->arch.shared->srr1 = regs->srr1;
1054         kvmppc_set_pid(vcpu, regs->pid);
1055         vcpu->arch.shared->sprg0 = regs->sprg0;
1056         vcpu->arch.shared->sprg1 = regs->sprg1;
1057         vcpu->arch.shared->sprg2 = regs->sprg2;
1058         vcpu->arch.shared->sprg3 = regs->sprg3;
1059         vcpu->arch.shared->sprg4 = regs->sprg4;
1060         vcpu->arch.shared->sprg5 = regs->sprg5;
1061         vcpu->arch.shared->sprg6 = regs->sprg6;
1062         vcpu->arch.shared->sprg7 = regs->sprg7;
1063
1064         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1065                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1066
1067         return 0;
1068 }
1069
1070 static void get_sregs_base(struct kvm_vcpu *vcpu,
1071                            struct kvm_sregs *sregs)
1072 {
1073         u64 tb = get_tb();
1074
1075         sregs->u.e.features |= KVM_SREGS_E_BASE;
1076
1077         sregs->u.e.csrr0 = vcpu->arch.csrr0;
1078         sregs->u.e.csrr1 = vcpu->arch.csrr1;
1079         sregs->u.e.mcsr = vcpu->arch.mcsr;
1080         sregs->u.e.esr = get_guest_esr(vcpu);
1081         sregs->u.e.dear = get_guest_dear(vcpu);
1082         sregs->u.e.tsr = vcpu->arch.tsr;
1083         sregs->u.e.tcr = vcpu->arch.tcr;
1084         sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1085         sregs->u.e.tb = tb;
1086         sregs->u.e.vrsave = vcpu->arch.vrsave;
1087 }
1088
1089 static int set_sregs_base(struct kvm_vcpu *vcpu,
1090                           struct kvm_sregs *sregs)
1091 {
1092         if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1093                 return 0;
1094
1095         vcpu->arch.csrr0 = sregs->u.e.csrr0;
1096         vcpu->arch.csrr1 = sregs->u.e.csrr1;
1097         vcpu->arch.mcsr = sregs->u.e.mcsr;
1098         set_guest_esr(vcpu, sregs->u.e.esr);
1099         set_guest_dear(vcpu, sregs->u.e.dear);
1100         vcpu->arch.vrsave = sregs->u.e.vrsave;
1101         kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1102
1103         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1104                 vcpu->arch.dec = sregs->u.e.dec;
1105                 kvmppc_emulate_dec(vcpu);
1106         }
1107
1108         if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) {
1109                 vcpu->arch.tsr = sregs->u.e.tsr;
1110                 update_timer_ints(vcpu);
1111         }
1112
1113         return 0;
1114 }
1115
1116 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1117                               struct kvm_sregs *sregs)
1118 {
1119         sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1120
1121         sregs->u.e.pir = vcpu->vcpu_id;
1122         sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1123         sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1124         sregs->u.e.decar = vcpu->arch.decar;
1125         sregs->u.e.ivpr = vcpu->arch.ivpr;
1126 }
1127
1128 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1129                              struct kvm_sregs *sregs)
1130 {
1131         if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1132                 return 0;
1133
1134         if (sregs->u.e.pir != vcpu->vcpu_id)
1135                 return -EINVAL;
1136
1137         vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1138         vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1139         vcpu->arch.decar = sregs->u.e.decar;
1140         vcpu->arch.ivpr = sregs->u.e.ivpr;
1141
1142         return 0;
1143 }
1144
1145 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1146 {
1147         sregs->u.e.features |= KVM_SREGS_E_IVOR;
1148
1149         sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1150         sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1151         sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1152         sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1153         sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1154         sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1155         sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1156         sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1157         sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1158         sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1159         sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1160         sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1161         sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1162         sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1163         sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1164         sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1165 }
1166
1167 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1168 {
1169         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1170                 return 0;
1171
1172         vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1173         vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1174         vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1175         vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1176         vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1177         vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1178         vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1179         vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1180         vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1181         vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1182         vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1183         vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1184         vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1185         vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1186         vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1187         vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1188
1189         return 0;
1190 }
1191
1192 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1193                                   struct kvm_sregs *sregs)
1194 {
1195         sregs->pvr = vcpu->arch.pvr;
1196
1197         get_sregs_base(vcpu, sregs);
1198         get_sregs_arch206(vcpu, sregs);
1199         kvmppc_core_get_sregs(vcpu, sregs);
1200         return 0;
1201 }
1202
1203 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1204                                   struct kvm_sregs *sregs)
1205 {
1206         int ret;
1207
1208         if (vcpu->arch.pvr != sregs->pvr)
1209                 return -EINVAL;
1210
1211         ret = set_sregs_base(vcpu, sregs);
1212         if (ret < 0)
1213                 return ret;
1214
1215         ret = set_sregs_arch206(vcpu, sregs);
1216         if (ret < 0)
1217                 return ret;
1218
1219         return kvmppc_core_set_sregs(vcpu, sregs);
1220 }
1221
1222 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1223 {
1224         return -EINVAL;
1225 }
1226
1227 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1228 {
1229         return -EINVAL;
1230 }
1231
1232 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1233 {
1234         return -ENOTSUPP;
1235 }
1236
1237 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1238 {
1239         return -ENOTSUPP;
1240 }
1241
1242 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1243                                   struct kvm_translation *tr)
1244 {
1245         int r;
1246
1247         r = kvmppc_core_vcpu_translate(vcpu, tr);
1248         return r;
1249 }
1250
1251 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1252 {
1253         return -ENOTSUPP;
1254 }
1255
1256 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1257                                       struct kvm_userspace_memory_region *mem)
1258 {
1259         return 0;
1260 }
1261
1262 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1263                                 struct kvm_userspace_memory_region *mem)
1264 {
1265 }
1266
1267 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1268 {
1269         vcpu->arch.tcr = new_tcr;
1270         update_timer_ints(vcpu);
1271 }
1272
1273 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1274 {
1275         set_bits(tsr_bits, &vcpu->arch.tsr);
1276         smp_wmb();
1277         kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1278         kvm_vcpu_kick(vcpu);
1279 }
1280
1281 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1282 {
1283         clear_bits(tsr_bits, &vcpu->arch.tsr);
1284         update_timer_ints(vcpu);
1285 }
1286
1287 void kvmppc_decrementer_func(unsigned long data)
1288 {
1289         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
1290
1291         if (vcpu->arch.tcr & TCR_ARE) {
1292                 vcpu->arch.dec = vcpu->arch.decar;
1293                 kvmppc_emulate_dec(vcpu);
1294         }
1295
1296         kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1297 }
1298
1299 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1300 {
1301         current->thread.kvm_vcpu = vcpu;
1302 }
1303
1304 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
1305 {
1306         current->thread.kvm_vcpu = NULL;
1307 }
1308
1309 int __init kvmppc_booke_init(void)
1310 {
1311 #ifndef CONFIG_KVM_BOOKE_HV
1312         unsigned long ivor[16];
1313         unsigned long max_ivor = 0;
1314         int i;
1315
1316         /* We install our own exception handlers by hijacking IVPR. IVPR must
1317          * be 16-bit aligned, so we need a 64KB allocation. */
1318         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
1319                                                  VCPU_SIZE_ORDER);
1320         if (!kvmppc_booke_handlers)
1321                 return -ENOMEM;
1322
1323         /* XXX make sure our handlers are smaller than Linux's */
1324
1325         /* Copy our interrupt handlers to match host IVORs. That way we don't
1326          * have to swap the IVORs on every guest/host transition. */
1327         ivor[0] = mfspr(SPRN_IVOR0);
1328         ivor[1] = mfspr(SPRN_IVOR1);
1329         ivor[2] = mfspr(SPRN_IVOR2);
1330         ivor[3] = mfspr(SPRN_IVOR3);
1331         ivor[4] = mfspr(SPRN_IVOR4);
1332         ivor[5] = mfspr(SPRN_IVOR5);
1333         ivor[6] = mfspr(SPRN_IVOR6);
1334         ivor[7] = mfspr(SPRN_IVOR7);
1335         ivor[8] = mfspr(SPRN_IVOR8);
1336         ivor[9] = mfspr(SPRN_IVOR9);
1337         ivor[10] = mfspr(SPRN_IVOR10);
1338         ivor[11] = mfspr(SPRN_IVOR11);
1339         ivor[12] = mfspr(SPRN_IVOR12);
1340         ivor[13] = mfspr(SPRN_IVOR13);
1341         ivor[14] = mfspr(SPRN_IVOR14);
1342         ivor[15] = mfspr(SPRN_IVOR15);
1343
1344         for (i = 0; i < 16; i++) {
1345                 if (ivor[i] > max_ivor)
1346                         max_ivor = ivor[i];
1347
1348                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
1349                        kvmppc_handlers_start + i * kvmppc_handler_len,
1350                        kvmppc_handler_len);
1351         }
1352         flush_icache_range(kvmppc_booke_handlers,
1353                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
1354 #endif /* !BOOKE_HV */
1355         return 0;
1356 }
1357
1358 void __exit kvmppc_booke_exit(void)
1359 {
1360         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
1361         kvm_exit();
1362 }