arch/powerpc/kvm/book3s_pr.c

   1 /*
   2  * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
   3  *
   4  * Authors:
   5  *    Alexander Graf <agraf@suse.de>
   6  *    Kevin Wolf <mail@kevin-wolf.de>
   7  *    Paul Mackerras <paulus@samba.org>
   8  *
   9  * Description:
  10  * Functions relating to running KVM on Book 3S processors where
  11  * we don't have access to hypervisor mode, and we run the guest
  12  * in problem state (user mode).
  13  *
  14  * This file is derived from arch/powerpc/kvm/44x.c,
  15  * by Hollis Blanchard <hollisb@us.ibm.com>.
  16  *
  17  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License, version 2, as
  19  * published by the Free Software Foundation.
  20  */
  21
  22 #include <linux/kvm_host.h>
  23 #include <linux/export.h>
  24 #include <linux/err.h>
  25 #include <linux/slab.h>
  26
  27 #include <asm/reg.h>
  28 #include <asm/cputable.h>
  29 #include <asm/cacheflush.h>
  30 #include <linux/uaccess.h>
  31 #include <asm/io.h>
  32 #include <asm/kvm_ppc.h>
  33 #include <asm/kvm_book3s.h>
  34 #include <asm/mmu_context.h>
  35 #include <asm/switch_to.h>
  36 #include <asm/firmware.h>
  37 #include <asm/setup.h>
  38 #include <linux/gfp.h>
  39 #include <linux/sched.h>
  40 #include <linux/vmalloc.h>
  41 #include <linux/highmem.h>
  42 #include <linux/module.h>
  43 #include <linux/miscdevice.h>
  44 #include <asm/asm-prototypes.h>
  45 #include <asm/tm.h>
  46
  47 #include "book3s.h"
  48
  49 #define CREATE_TRACE_POINTS
  50 #include "trace_pr.h"
  51
  52 /* #define EXIT_DEBUG */
  53 /* #define DEBUG_EXT */
  54
  55 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
  56                              ulong msr);
  57 #ifdef CONFIG_PPC_BOOK3S_64
  58 static int kvmppc_handle_fac(struct kvm_vcpu *vcpu, ulong fac);
  59 #endif
  60
  61 /* Some compatibility defines */
  62 #ifdef CONFIG_PPC_BOOK3S_32
  63 #define MSR_USER32 MSR_USER
  64 #define MSR_USER64 MSR_USER
  65 #define HW_PAGE_SIZE PAGE_SIZE
  66 #define HPTE_R_M   _PAGE_COHERENT
  67 #endif
  68
  69 static bool kvmppc_is_split_real(struct kvm_vcpu *vcpu)
  70 {
  71         ulong msr = kvmppc_get_msr(vcpu);
  72         return (msr & (MSR_IR|MSR_DR)) == MSR_DR;
  73 }
  74
  75 static void kvmppc_fixup_split_real(struct kvm_vcpu *vcpu)
  76 {
  77         ulong msr = kvmppc_get_msr(vcpu);
  78         ulong pc = kvmppc_get_pc(vcpu);
  79
  80         /* We are in DR only split real mode */
  81         if ((msr & (MSR_IR|MSR_DR)) != MSR_DR)
  82                 return;
  83
  84         /* We have not fixed up the guest already */
  85         if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK)
  86                 return;
  87
  88         /* The code is in fixupable address space */
  89         if (pc & SPLIT_HACK_MASK)
  90                 return;
  91
  92         vcpu->arch.hflags |= BOOK3S_HFLAG_SPLIT_HACK;
  93         kvmppc_set_pc(vcpu, pc | SPLIT_HACK_OFFS);
  94 }
  95
  96 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu);
  97
  98 static void kvmppc_core_vcpu_load_pr(struct kvm_vcpu *vcpu, int cpu)
  99 {
 100 #ifdef CONFIG_PPC_BOOK3S_64
 101         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 102         memcpy(svcpu->slb, to_book3s(vcpu)->slb_shadow, sizeof(svcpu->slb));
 103         svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
 104         svcpu->in_use = 0;
 105         svcpu_put(svcpu);
 106 #endif
 107
 108         /* Disable AIL if supported */
 109         if (cpu_has_feature(CPU_FTR_HVMODE) &&
 110             cpu_has_feature(CPU_FTR_ARCH_207S))
 111                 mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) & ~LPCR_AIL);
 112
 113         vcpu->cpu = smp_processor_id();
 114 #ifdef CONFIG_PPC_BOOK3S_32
 115         current->thread.kvm_shadow_vcpu = vcpu->arch.shadow_vcpu;
 116 #endif
 117
 118         if (kvmppc_is_split_real(vcpu))
 119                 kvmppc_fixup_split_real(vcpu);
 120
 121         kvmppc_restore_tm_pr(vcpu);
 122 }
 123
 124 static void kvmppc_core_vcpu_put_pr(struct kvm_vcpu *vcpu)
 125 {
 126 #ifdef CONFIG_PPC_BOOK3S_64
 127         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 128         if (svcpu->in_use) {
 129                 kvmppc_copy_from_svcpu(vcpu);
 130         }
 131         memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
 132         to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
 133         svcpu_put(svcpu);
 134 #endif
 135
 136         if (kvmppc_is_split_real(vcpu))
 137                 kvmppc_unfixup_split_real(vcpu);
 138
 139         kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
 140         kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
 141         kvmppc_save_tm_pr(vcpu);
 142
 143         /* Enable AIL if supported */
 144         if (cpu_has_feature(CPU_FTR_HVMODE) &&
 145             cpu_has_feature(CPU_FTR_ARCH_207S))
 146                 mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) | LPCR_AIL_3);
 147
 148         vcpu->cpu = -1;
 149 }
 150
 151 /* Copy data needed by real-mode code from vcpu to shadow vcpu */
 152 void kvmppc_copy_to_svcpu(struct kvm_vcpu *vcpu)
 153 {
 154         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 155
 156         svcpu->gpr[0] = vcpu->arch.regs.gpr[0];
 157         svcpu->gpr[1] = vcpu->arch.regs.gpr[1];
 158         svcpu->gpr[2] = vcpu->arch.regs.gpr[2];
 159         svcpu->gpr[3] = vcpu->arch.regs.gpr[3];
 160         svcpu->gpr[4] = vcpu->arch.regs.gpr[4];
 161         svcpu->gpr[5] = vcpu->arch.regs.gpr[5];
 162         svcpu->gpr[6] = vcpu->arch.regs.gpr[6];
 163         svcpu->gpr[7] = vcpu->arch.regs.gpr[7];
 164         svcpu->gpr[8] = vcpu->arch.regs.gpr[8];
 165         svcpu->gpr[9] = vcpu->arch.regs.gpr[9];
 166         svcpu->gpr[10] = vcpu->arch.regs.gpr[10];
 167         svcpu->gpr[11] = vcpu->arch.regs.gpr[11];
 168         svcpu->gpr[12] = vcpu->arch.regs.gpr[12];
 169         svcpu->gpr[13] = vcpu->arch.regs.gpr[13];
 170         svcpu->cr  = vcpu->arch.regs.ccr;
 171         svcpu->xer = vcpu->arch.regs.xer;
 172         svcpu->ctr = vcpu->arch.regs.ctr;
 173         svcpu->lr  = vcpu->arch.regs.link;
 174         svcpu->pc  = vcpu->arch.regs.nip;
 175 #ifdef CONFIG_PPC_BOOK3S_64
 176         svcpu->shadow_fscr = vcpu->arch.shadow_fscr;
 177 #endif
 178         /*
 179          * Now also save the current time base value. We use this
 180          * to find the guest purr and spurr value.
 181          */
 182         vcpu->arch.entry_tb = get_tb();
 183         vcpu->arch.entry_vtb = get_vtb();
 184         if (cpu_has_feature(CPU_FTR_ARCH_207S))
 185                 vcpu->arch.entry_ic = mfspr(SPRN_IC);
 186         svcpu->in_use = true;
 187
 188         svcpu_put(svcpu);
 189 }
 190
 191 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
 192 {
 193         ulong guest_msr = kvmppc_get_msr(vcpu);
 194         ulong smsr = guest_msr;
 195
 196         /* Guest MSR values */
 197 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 198         smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_LE |
 199                 MSR_TM | MSR_TS_MASK;
 200 #else
 201         smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_LE;
 202 #endif
 203         /* Process MSR values */
 204         smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
 205         /* External providers the guest reserved */
 206         smsr |= (guest_msr & vcpu->arch.guest_owned_ext);
 207         /* 64-bit Process MSR values */
 208 #ifdef CONFIG_PPC_BOOK3S_64
 209         smsr |= MSR_ISF | MSR_HV;
 210 #endif
 211 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 212         /*
 213          * in guest privileged state, we want to fail all TM transactions.
 214          * So disable MSR TM bit so that all tbegin. will be able to be
 215          * trapped into host.
 216          */
 217         if (!(guest_msr & MSR_PR))
 218                 smsr &= ~MSR_TM;
 219 #endif
 220         vcpu->arch.shadow_msr = smsr;
 221 }
 222
 223 /* Copy data touched by real-mode code from shadow vcpu back to vcpu */
 224 void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu)
 225 {
 226         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 227 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 228         ulong old_msr;
 229 #endif
 230
 231         /*
 232          * Maybe we were already preempted and synced the svcpu from
 233          * our preempt notifiers. Don't bother touching this svcpu then.
 234          */
 235         if (!svcpu->in_use)
 236                 goto out;
 237
 238         vcpu->arch.regs.gpr[0] = svcpu->gpr[0];
 239         vcpu->arch.regs.gpr[1] = svcpu->gpr[1];
 240         vcpu->arch.regs.gpr[2] = svcpu->gpr[2];
 241         vcpu->arch.regs.gpr[3] = svcpu->gpr[3];
 242         vcpu->arch.regs.gpr[4] = svcpu->gpr[4];
 243         vcpu->arch.regs.gpr[5] = svcpu->gpr[5];
 244         vcpu->arch.regs.gpr[6] = svcpu->gpr[6];
 245         vcpu->arch.regs.gpr[7] = svcpu->gpr[7];
 246         vcpu->arch.regs.gpr[8] = svcpu->gpr[8];
 247         vcpu->arch.regs.gpr[9] = svcpu->gpr[9];
 248         vcpu->arch.regs.gpr[10] = svcpu->gpr[10];
 249         vcpu->arch.regs.gpr[11] = svcpu->gpr[11];
 250         vcpu->arch.regs.gpr[12] = svcpu->gpr[12];
 251         vcpu->arch.regs.gpr[13] = svcpu->gpr[13];
 252         vcpu->arch.regs.ccr  = svcpu->cr;
 253         vcpu->arch.regs.xer = svcpu->xer;
 254         vcpu->arch.regs.ctr = svcpu->ctr;
 255         vcpu->arch.regs.link  = svcpu->lr;
 256         vcpu->arch.regs.nip  = svcpu->pc;
 257         vcpu->arch.shadow_srr1 = svcpu->shadow_srr1;
 258         vcpu->arch.fault_dar   = svcpu->fault_dar;
 259         vcpu->arch.fault_dsisr = svcpu->fault_dsisr;
 260         vcpu->arch.last_inst   = svcpu->last_inst;
 261 #ifdef CONFIG_PPC_BOOK3S_64
 262         vcpu->arch.shadow_fscr = svcpu->shadow_fscr;
 263 #endif
 264         /*
 265          * Update purr and spurr using time base on exit.
 266          */
 267         vcpu->arch.purr += get_tb() - vcpu->arch.entry_tb;
 268         vcpu->arch.spurr += get_tb() - vcpu->arch.entry_tb;
 269         to_book3s(vcpu)->vtb += get_vtb() - vcpu->arch.entry_vtb;
 270         if (cpu_has_feature(CPU_FTR_ARCH_207S))
 271                 vcpu->arch.ic += mfspr(SPRN_IC) - vcpu->arch.entry_ic;
 272
 273 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 274         /*
 275          * Unlike other MSR bits, MSR[TS]bits can be changed at guest without
 276          * notifying host:
 277          *  modified by unprivileged instructions like "tbegin"/"tend"/
 278          * "tresume"/"tsuspend" in PR KVM guest.
 279          *
 280          * It is necessary to sync here to calculate a correct shadow_msr.
 281          *
 282          * privileged guest's tbegin will be failed at present. So we
 283          * only take care of problem state guest.
 284          */
 285         old_msr = kvmppc_get_msr(vcpu);
 286         if (unlikely((old_msr & MSR_PR) &&
 287                 (vcpu->arch.shadow_srr1 & (MSR_TS_MASK)) !=
 288                                 (old_msr & (MSR_TS_MASK)))) {
 289                 old_msr &= ~(MSR_TS_MASK);
 290                 old_msr |= (vcpu->arch.shadow_srr1 & (MSR_TS_MASK));
 291                 kvmppc_set_msr_fast(vcpu, old_msr);
 292                 kvmppc_recalc_shadow_msr(vcpu);
 293         }
 294 #endif
 295
 296         svcpu->in_use = false;
 297
 298 out:
 299         svcpu_put(svcpu);
 300 }
 301
 302 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 303 void kvmppc_save_tm_sprs(struct kvm_vcpu *vcpu)
 304 {
 305         tm_enable();
 306         vcpu->arch.tfhar = mfspr(SPRN_TFHAR);
 307         vcpu->arch.texasr = mfspr(SPRN_TEXASR);
 308         vcpu->arch.tfiar = mfspr(SPRN_TFIAR);
 309         tm_disable();
 310 }
 311
 312 void kvmppc_restore_tm_sprs(struct kvm_vcpu *vcpu)
 313 {
 314         tm_enable();
 315         mtspr(SPRN_TFHAR, vcpu->arch.tfhar);
 316         mtspr(SPRN_TEXASR, vcpu->arch.texasr);
 317         mtspr(SPRN_TFIAR, vcpu->arch.tfiar);
 318         tm_disable();
 319 }
 320
 321 /* loadup math bits which is enabled at kvmppc_get_msr() but not enabled at
 322  * hardware.
 323  */
 324 static void kvmppc_handle_lost_math_exts(struct kvm_vcpu *vcpu)
 325 {
 326         ulong exit_nr;
 327         ulong ext_diff = (kvmppc_get_msr(vcpu) & ~vcpu->arch.guest_owned_ext) &
 328                 (MSR_FP | MSR_VEC | MSR_VSX);
 329
 330         if (!ext_diff)
 331                 return;
 332
 333         if (ext_diff == MSR_FP)
 334                 exit_nr = BOOK3S_INTERRUPT_FP_UNAVAIL;
 335         else if (ext_diff == MSR_VEC)
 336                 exit_nr = BOOK3S_INTERRUPT_ALTIVEC;
 337         else
 338                 exit_nr = BOOK3S_INTERRUPT_VSX;
 339
 340         kvmppc_handle_ext(vcpu, exit_nr, ext_diff);
 341 }
 342
 343 void kvmppc_save_tm_pr(struct kvm_vcpu *vcpu)
 344 {
 345         if (!(MSR_TM_ACTIVE(kvmppc_get_msr(vcpu)))) {
 346                 kvmppc_save_tm_sprs(vcpu);
 347                 return;
 348         }
 349
 350         kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
 351         kvmppc_giveup_ext(vcpu, MSR_VSX);
 352
 353         preempt_disable();
 354         _kvmppc_save_tm_pr(vcpu, mfmsr());
 355         preempt_enable();
 356 }
 357
 358 void kvmppc_restore_tm_pr(struct kvm_vcpu *vcpu)
 359 {
 360         if (!MSR_TM_ACTIVE(kvmppc_get_msr(vcpu))) {
 361                 kvmppc_restore_tm_sprs(vcpu);
 362                 if (kvmppc_get_msr(vcpu) & MSR_TM) {
 363                         kvmppc_handle_lost_math_exts(vcpu);
 364                         if (vcpu->arch.fscr & FSCR_TAR)
 365                                 kvmppc_handle_fac(vcpu, FSCR_TAR_LG);
 366                 }
 367                 return;
 368         }
 369
 370         preempt_disable();
 371         _kvmppc_restore_tm_pr(vcpu, kvmppc_get_msr(vcpu));
 372         preempt_enable();
 373
 374         if (kvmppc_get_msr(vcpu) & MSR_TM) {
 375                 kvmppc_handle_lost_math_exts(vcpu);
 376                 if (vcpu->arch.fscr & FSCR_TAR)
 377                         kvmppc_handle_fac(vcpu, FSCR_TAR_LG);
 378         }
 379 }
 380 #endif
 381
 382 static int kvmppc_core_check_requests_pr(struct kvm_vcpu *vcpu)
 383 {
 384         int r = 1; /* Indicate we want to get back into the guest */
 385
 386         /* We misuse TLB_FLUSH to indicate that we want to clear
 387            all shadow cache entries */
 388         if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
 389                 kvmppc_mmu_pte_flush(vcpu, 0, 0);
 390
 391         return r;
 392 }
 393
 394 /************* MMU Notifiers *************/
 395 static void do_kvm_unmap_hva(struct kvm *kvm, unsigned long start,
 396                              unsigned long end)
 397 {
 398         long i;
 399         struct kvm_vcpu *vcpu;
 400         struct kvm_memslots *slots;
 401         struct kvm_memory_slot *memslot;
 402
 403         slots = kvm_memslots(kvm);
 404         kvm_for_each_memslot(memslot, slots) {
 405                 unsigned long hva_start, hva_end;
 406                 gfn_t gfn, gfn_end;
 407
 408                 hva_start = max(start, memslot->userspace_addr);
 409                 hva_end = min(end, memslot->userspace_addr +
 410                                         (memslot->npages << PAGE_SHIFT));
 411                 if (hva_start >= hva_end)
 412                         continue;
 413                 /*
 414                  * {gfn(page) | page intersects with [hva_start, hva_end)} =
 415                  * {gfn, gfn+1, ..., gfn_end-1}.
 416                  */
 417                 gfn = hva_to_gfn_memslot(hva_start, memslot);
 418                 gfn_end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, memslot);
 419                 kvm_for_each_vcpu(i, vcpu, kvm)
 420                         kvmppc_mmu_pte_pflush(vcpu, gfn << PAGE_SHIFT,
 421                                               gfn_end << PAGE_SHIFT);
 422         }
 423 }
 424
 425 static int kvm_unmap_hva_range_pr(struct kvm *kvm, unsigned long start,
 426                                   unsigned long end)
 427 {
 428         do_kvm_unmap_hva(kvm, start, end);
 429
 430         return 0;
 431 }
 432
 433 static int kvm_age_hva_pr(struct kvm *kvm, unsigned long start,
 434                           unsigned long end)
 435 {
 436         /* XXX could be more clever ;) */
 437         return 0;
 438 }
 439
 440 static int kvm_test_age_hva_pr(struct kvm *kvm, unsigned long hva)
 441 {
 442         /* XXX could be more clever ;) */
 443         return 0;
 444 }
 445
 446 static void kvm_set_spte_hva_pr(struct kvm *kvm, unsigned long hva, pte_t pte)
 447 {
 448         /* The page will get remapped properly on its next fault */
 449         do_kvm_unmap_hva(kvm, hva, hva + PAGE_SIZE);
 450 }
 451
 452 /*****************************************/
 453
 454 static void kvmppc_set_msr_pr(struct kvm_vcpu *vcpu, u64 msr)
 455 {
 456         ulong old_msr;
 457
 458         /* For PAPR guest, make sure MSR reflects guest mode */
 459         if (vcpu->arch.papr_enabled)
 460                 msr = (msr & ~MSR_HV) | MSR_ME;
 461
 462 #ifdef EXIT_DEBUG
 463         printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
 464 #endif
 465
 466 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 467         /* We should never target guest MSR to TS=10 && PR=0,
 468          * since we always fail transaction for guest privilege
 469          * state.
 470          */
 471         if (!(msr & MSR_PR) && MSR_TM_TRANSACTIONAL(msr))
 472                 kvmppc_emulate_tabort(vcpu,
 473                         TM_CAUSE_KVM_FAC_UNAV | TM_CAUSE_PERSISTENT);
 474 #endif
 475
 476         old_msr = kvmppc_get_msr(vcpu);
 477         msr &= to_book3s(vcpu)->msr_mask;
 478         kvmppc_set_msr_fast(vcpu, msr);
 479         kvmppc_recalc_shadow_msr(vcpu);
 480
 481         if (msr & MSR_POW) {
 482                 if (!vcpu->arch.pending_exceptions) {
 483                         kvm_vcpu_block(vcpu);
 484                         kvm_clear_request(KVM_REQ_UNHALT, vcpu);
 485                         vcpu->stat.halt_wakeup++;
 486
 487                         /* Unset POW bit after we woke up */
 488                         msr &= ~MSR_POW;
 489                         kvmppc_set_msr_fast(vcpu, msr);
 490                 }
 491         }
 492
 493         if (kvmppc_is_split_real(vcpu))
 494                 kvmppc_fixup_split_real(vcpu);
 495         else
 496                 kvmppc_unfixup_split_real(vcpu);
 497
 498         if ((kvmppc_get_msr(vcpu) & (MSR_PR|MSR_IR|MSR_DR)) !=
 499                    (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
 500                 kvmppc_mmu_flush_segments(vcpu);
 501                 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
 502
 503                 /* Preload magic page segment when in kernel mode */
 504                 if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
 505                         struct kvm_vcpu_arch *a = &vcpu->arch;
 506
 507                         if (msr & MSR_DR)
 508                                 kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
 509                         else
 510                                 kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
 511                 }
 512         }
 513
 514         /*
 515          * When switching from 32 to 64-bit, we may have a stale 32-bit
 516          * magic page around, we need to flush it. Typically 32-bit magic
 517          * page will be instantiated when calling into RTAS. Note: We
 518          * assume that such transition only happens while in kernel mode,
 519          * ie, we never transition from user 32-bit to kernel 64-bit with
 520          * a 32-bit magic page around.
 521          */
 522         if (vcpu->arch.magic_page_pa &&
 523             !(old_msr & MSR_PR) && !(old_msr & MSR_SF) && (msr & MSR_SF)) {
 524                 /* going from RTAS to normal kernel code */
 525                 kvmppc_mmu_pte_flush(vcpu, (uint32_t)vcpu->arch.magic_page_pa,
 526                                      ~0xFFFUL);
 527         }
 528
 529         /* Preload FPU if it's enabled */
 530         if (kvmppc_get_msr(vcpu) & MSR_FP)
 531                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
 532
 533 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 534         if (kvmppc_get_msr(vcpu) & MSR_TM)
 535                 kvmppc_handle_lost_math_exts(vcpu);
 536 #endif
 537 }
 538
 539 void kvmppc_set_pvr_pr(struct kvm_vcpu *vcpu, u32 pvr)
 540 {
 541         u32 host_pvr;
 542
 543         vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
 544         vcpu->arch.pvr = pvr;
 545 #ifdef CONFIG_PPC_BOOK3S_64
 546         if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
 547                 kvmppc_mmu_book3s_64_init(vcpu);
 548                 if (!to_book3s(vcpu)->hior_explicit)
 549                         to_book3s(vcpu)->hior = 0xfff00000;
 550                 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
 551                 vcpu->arch.cpu_type = KVM_CPU_3S_64;
 552         } else
 553 #endif
 554         {
 555                 kvmppc_mmu_book3s_32_init(vcpu);
 556                 if (!to_book3s(vcpu)->hior_explicit)
 557                         to_book3s(vcpu)->hior = 0;
 558                 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
 559                 vcpu->arch.cpu_type = KVM_CPU_3S_32;
 560         }
 561
 562         kvmppc_sanity_check(vcpu);
 563
 564         /* If we are in hypervisor level on 970, we can tell the CPU to
 565          * treat DCBZ as 32 bytes store */
 566         vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
 567         if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
 568             !strcmp(cur_cpu_spec->platform, "ppc970"))
 569                 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 570
 571         /* Cell performs badly if MSR_FEx are set. So let's hope nobody
 572            really needs them in a VM on Cell and force disable them. */
 573         if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
 574                 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
 575
 576         /*
 577          * If they're asking for POWER6 or later, set the flag
 578          * indicating that we can do multiple large page sizes
 579          * and 1TB segments.
 580          * Also set the flag that indicates that tlbie has the large
 581          * page bit in the RB operand instead of the instruction.
 582          */
 583         switch (PVR_VER(pvr)) {
 584         case PVR_POWER6:
 585         case PVR_POWER7:
 586         case PVR_POWER7p:
 587         case PVR_POWER8:
 588         case PVR_POWER8E:
 589         case PVR_POWER8NVL:
 590                 vcpu->arch.hflags |= BOOK3S_HFLAG_MULTI_PGSIZE |
 591                         BOOK3S_HFLAG_NEW_TLBIE;
 592                 break;
 593         }
 594
 595 #ifdef CONFIG_PPC_BOOK3S_32
 596         /* 32 bit Book3S always has 32 byte dcbz */
 597         vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 598 #endif
 599
 600         /* On some CPUs we can execute paired single operations natively */
 601         asm ( "mfpvr %0" : "=r"(host_pvr));
 602         switch (host_pvr) {
 603         case 0x00080200:        /* lonestar 2.0 */
 604         case 0x00088202:        /* lonestar 2.2 */
 605         case 0x70000100:        /* gekko 1.0 */
 606         case 0x00080100:        /* gekko 2.0 */
 607         case 0x00083203:        /* gekko 2.3a */
 608         case 0x00083213:        /* gekko 2.3b */
 609         case 0x00083204:        /* gekko 2.4 */
 610         case 0x00083214:        /* gekko 2.4e (8SE) - retail HW2 */
 611         case 0x00087200:        /* broadway */
 612                 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
 613                 /* Enable HID2.PSE - in case we need it later */
 614                 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
 615         }
 616 }
 617
 618 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
 619  * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
 620  * emulate 32 bytes dcbz length.
 621  *
 622  * The Book3s_64 inventors also realized this case and implemented a special bit
 623  * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
 624  *
 625  * My approach here is to patch the dcbz instruction on executing pages.
 626  */
 627 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
 628 {
 629         struct page *hpage;
 630         u64 hpage_offset;
 631         u32 *page;
 632         int i;
 633
 634         hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 635         if (is_error_page(hpage))
 636                 return;
 637
 638         hpage_offset = pte->raddr & ~PAGE_MASK;
 639         hpage_offset &= ~0xFFFULL;
 640         hpage_offset /= 4;
 641
 642         get_page(hpage);
 643         page = kmap_atomic(hpage);
 644
 645         /* patch dcbz into reserved instruction, so we trap */
 646         for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
 647                 if ((be32_to_cpu(page[i]) & 0xff0007ff) == INS_DCBZ)
 648                         page[i] &= cpu_to_be32(0xfffffff7);
 649
 650         kunmap_atomic(page);
 651         put_page(hpage);
 652 }
 653
 654 static bool kvmppc_visible_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
 655 {
 656         ulong mp_pa = vcpu->arch.magic_page_pa;
 657
 658         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 659                 mp_pa = (uint32_t)mp_pa;
 660
 661         gpa &= ~0xFFFULL;
 662         if (unlikely(mp_pa) && unlikely((mp_pa & KVM_PAM) == (gpa & KVM_PAM))) {
 663                 return true;
 664         }
 665
 666         return kvm_is_visible_gfn(vcpu->kvm, gpa >> PAGE_SHIFT);
 667 }
 668
 669 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
 670                             ulong eaddr, int vec)
 671 {
 672         bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
 673         bool iswrite = false;
 674         int r = RESUME_GUEST;
 675         int relocated;
 676         int page_found = 0;
 677         struct kvmppc_pte pte = { 0 };
 678         bool dr = (kvmppc_get_msr(vcpu) & MSR_DR) ? true : false;
 679         bool ir = (kvmppc_get_msr(vcpu) & MSR_IR) ? true : false;
 680         u64 vsid;
 681
 682         relocated = data ? dr : ir;
 683         if (data && (vcpu->arch.fault_dsisr & DSISR_ISSTORE))
 684                 iswrite = true;
 685
 686         /* Resolve real address if translation turned on */
 687         if (relocated) {
 688                 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data, iswrite);
 689         } else {
 690                 pte.may_execute = true;
 691                 pte.may_read = true;
 692                 pte.may_write = true;
 693                 pte.raddr = eaddr & KVM_PAM;
 694                 pte.eaddr = eaddr;
 695                 pte.vpage = eaddr >> 12;
 696                 pte.page_size = MMU_PAGE_64K;
 697                 pte.wimg = HPTE_R_M;
 698         }
 699
 700         switch (kvmppc_get_msr(vcpu) & (MSR_DR|MSR_IR)) {
 701         case 0:
 702                 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
 703                 break;
 704         case MSR_DR:
 705                 if (!data &&
 706                     (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 707                     ((pte.raddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 708                         pte.raddr &= ~SPLIT_HACK_MASK;
 709                 /* fall through */
 710         case MSR_IR:
 711                 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
 712
 713                 if ((kvmppc_get_msr(vcpu) & (MSR_DR|MSR_IR)) == MSR_DR)
 714                         pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
 715                 else
 716                         pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
 717                 pte.vpage |= vsid;
 718
 719                 if (vsid == -1)
 720                         page_found = -EINVAL;
 721                 break;
 722         }
 723
 724         if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 725            (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
 726                 /*
 727                  * If we do the dcbz hack, we have to NX on every execution,
 728                  * so we can patch the executing code. This renders our guest
 729                  * NX-less.
 730                  */
 731                 pte.may_execute = !data;
 732         }
 733
 734         if (page_found == -ENOENT || page_found == -EPERM) {
 735                 /* Page not found in guest PTE entries, or protection fault */
 736                 u64 flags;
 737
 738                 if (page_found == -EPERM)
 739                         flags = DSISR_PROTFAULT;
 740                 else
 741                         flags = DSISR_NOHPTE;
 742                 if (data) {
 743                         flags |= vcpu->arch.fault_dsisr & DSISR_ISSTORE;
 744                         kvmppc_core_queue_data_storage(vcpu, eaddr, flags);
 745                 } else {
 746                         kvmppc_core_queue_inst_storage(vcpu, flags);
 747                 }
 748         } else if (page_found == -EINVAL) {
 749                 /* Page not found in guest SLB */
 750                 kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
 751                 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
 752         } else if (kvmppc_visible_gpa(vcpu, pte.raddr)) {
 753                 if (data && !(vcpu->arch.fault_dsisr & DSISR_NOHPTE)) {
 754                         /*
 755                          * There is already a host HPTE there, presumably
 756                          * a read-only one for a page the guest thinks
 757                          * is writable, so get rid of it first.
 758                          */
 759                         kvmppc_mmu_unmap_page(vcpu, &pte);
 760                 }
 761                 /* The guest's PTE is not mapped yet. Map on the host */
 762                 if (kvmppc_mmu_map_page(vcpu, &pte, iswrite) == -EIO) {
 763                         /* Exit KVM if mapping failed */
 764                         run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 765                         return RESUME_HOST;
 766                 }
 767                 if (data)
 768                         vcpu->stat.sp_storage++;
 769                 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 770                          (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
 771                         kvmppc_patch_dcbz(vcpu, &pte);
 772         } else {
 773                 /* MMIO */
 774                 vcpu->stat.mmio_exits++;
 775                 vcpu->arch.paddr_accessed = pte.raddr;
 776                 vcpu->arch.vaddr_accessed = pte.eaddr;
 777                 r = kvmppc_emulate_mmio(run, vcpu);
 778                 if ( r == RESUME_HOST_NV )
 779                         r = RESUME_HOST;
 780         }
 781
 782         return r;
 783 }
 784
 785 /* Give up external provider (FPU, Altivec, VSX) */
 786 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
 787 {
 788         struct thread_struct *t = &current->thread;
 789
 790         /*
 791          * VSX instructions can access FP and vector registers, so if
 792          * we are giving up VSX, make sure we give up FP and VMX as well.
 793          */
 794         if (msr & MSR_VSX)
 795                 msr |= MSR_FP | MSR_VEC;
 796
 797         msr &= vcpu->arch.guest_owned_ext;
 798         if (!msr)
 799                 return;
 800
 801 #ifdef DEBUG_EXT
 802         printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
 803 #endif
 804
 805         if (msr & MSR_FP) {
 806                 /*
 807                  * Note that on CPUs with VSX, giveup_fpu stores
 808                  * both the traditional FP registers and the added VSX
 809                  * registers into thread.fp_state.fpr[].
 810                  */
 811                 if (t->regs->msr & MSR_FP)
 812                         giveup_fpu(current);
 813                 t->fp_save_area = NULL;
 814         }
 815
 816 #ifdef CONFIG_ALTIVEC
 817         if (msr & MSR_VEC) {
 818                 if (current->thread.regs->msr & MSR_VEC)
 819                         giveup_altivec(current);
 820                 t->vr_save_area = NULL;
 821         }
 822 #endif
 823
 824         vcpu->arch.guest_owned_ext &= ~(msr | MSR_VSX);
 825         kvmppc_recalc_shadow_msr(vcpu);
 826 }
 827
 828 /* Give up facility (TAR / EBB / DSCR) */
 829 void kvmppc_giveup_fac(struct kvm_vcpu *vcpu, ulong fac)
 830 {
 831 #ifdef CONFIG_PPC_BOOK3S_64
 832         if (!(vcpu->arch.shadow_fscr & (1ULL << fac))) {
 833                 /* Facility not available to the guest, ignore giveup request*/
 834                 return;
 835         }
 836
 837         switch (fac) {
 838         case FSCR_TAR_LG:
 839                 vcpu->arch.tar = mfspr(SPRN_TAR);
 840                 mtspr(SPRN_TAR, current->thread.tar);
 841                 vcpu->arch.shadow_fscr &= ~FSCR_TAR;
 842                 break;
 843         }
 844 #endif
 845 }
 846
 847 /* Handle external providers (FPU, Altivec, VSX) */
 848 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
 849                              ulong msr)
 850 {
 851         struct thread_struct *t = &current->thread;
 852
 853         /* When we have paired singles, we emulate in software */
 854         if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
 855                 return RESUME_GUEST;
 856
 857         if (!(kvmppc_get_msr(vcpu) & msr)) {
 858                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 859                 return RESUME_GUEST;
 860         }
 861
 862         if (msr == MSR_VSX) {
 863                 /* No VSX?  Give an illegal instruction interrupt */
 864 #ifdef CONFIG_VSX
 865                 if (!cpu_has_feature(CPU_FTR_VSX))
 866 #endif
 867                 {
 868                         kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
 869                         return RESUME_GUEST;
 870                 }
 871
 872                 /*
 873                  * We have to load up all the FP and VMX registers before
 874                  * we can let the guest use VSX instructions.
 875                  */
 876                 msr = MSR_FP | MSR_VEC | MSR_VSX;
 877         }
 878
 879         /* See if we already own all the ext(s) needed */
 880         msr &= ~vcpu->arch.guest_owned_ext;
 881         if (!msr)
 882                 return RESUME_GUEST;
 883
 884 #ifdef DEBUG_EXT
 885         printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
 886 #endif
 887
 888         if (msr & MSR_FP) {
 889                 preempt_disable();
 890                 enable_kernel_fp();
 891                 load_fp_state(&vcpu->arch.fp);
 892                 disable_kernel_fp();
 893                 t->fp_save_area = &vcpu->arch.fp;
 894                 preempt_enable();
 895         }
 896
 897         if (msr & MSR_VEC) {
 898 #ifdef CONFIG_ALTIVEC
 899                 preempt_disable();
 900                 enable_kernel_altivec();
 901                 load_vr_state(&vcpu->arch.vr);
 902                 disable_kernel_altivec();
 903                 t->vr_save_area = &vcpu->arch.vr;
 904                 preempt_enable();
 905 #endif
 906         }
 907
 908         t->regs->msr |= msr;
 909         vcpu->arch.guest_owned_ext |= msr;
 910         kvmppc_recalc_shadow_msr(vcpu);
 911
 912         return RESUME_GUEST;
 913 }
 914
 915 /*
 916  * Kernel code using FP or VMX could have flushed guest state to
 917  * the thread_struct; if so, get it back now.
 918  */
 919 static void kvmppc_handle_lost_ext(struct kvm_vcpu *vcpu)
 920 {
 921         unsigned long lost_ext;
 922
 923         lost_ext = vcpu->arch.guest_owned_ext & ~current->thread.regs->msr;
 924         if (!lost_ext)
 925                 return;
 926
 927         if (lost_ext & MSR_FP) {
 928                 preempt_disable();
 929                 enable_kernel_fp();
 930                 load_fp_state(&vcpu->arch.fp);
 931                 disable_kernel_fp();
 932                 preempt_enable();
 933         }
 934 #ifdef CONFIG_ALTIVEC
 935         if (lost_ext & MSR_VEC) {
 936                 preempt_disable();
 937                 enable_kernel_altivec();
 938                 load_vr_state(&vcpu->arch.vr);
 939                 disable_kernel_altivec();
 940                 preempt_enable();
 941         }
 942 #endif
 943         current->thread.regs->msr |= lost_ext;
 944 }
 945
 946 #ifdef CONFIG_PPC_BOOK3S_64
 947
 948 void kvmppc_trigger_fac_interrupt(struct kvm_vcpu *vcpu, ulong fac)
 949 {
 950         /* Inject the Interrupt Cause field and trigger a guest interrupt */
 951         vcpu->arch.fscr &= ~(0xffULL << 56);
 952         vcpu->arch.fscr |= (fac << 56);
 953         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_FAC_UNAVAIL);
 954 }
 955
 956 static void kvmppc_emulate_fac(struct kvm_vcpu *vcpu, ulong fac)
 957 {
 958         enum emulation_result er = EMULATE_FAIL;
 959
 960         if (!(kvmppc_get_msr(vcpu) & MSR_PR))
 961                 er = kvmppc_emulate_instruction(vcpu->run, vcpu);
 962
 963         if ((er != EMULATE_DONE) && (er != EMULATE_AGAIN)) {
 964                 /* Couldn't emulate, trigger interrupt in guest */
 965                 kvmppc_trigger_fac_interrupt(vcpu, fac);
 966         }
 967 }
 968
 969 /* Enable facilities (TAR, EBB, DSCR) for the guest */
 970 static int kvmppc_handle_fac(struct kvm_vcpu *vcpu, ulong fac)
 971 {
 972         bool guest_fac_enabled;
 973         BUG_ON(!cpu_has_feature(CPU_FTR_ARCH_207S));
 974
 975         /*
 976          * Not every facility is enabled by FSCR bits, check whether the
 977          * guest has this facility enabled at all.
 978          */
 979         switch (fac) {
 980         case FSCR_TAR_LG:
 981         case FSCR_EBB_LG:
 982                 guest_fac_enabled = (vcpu->arch.fscr & (1ULL << fac));
 983                 break;
 984         case FSCR_TM_LG:
 985                 guest_fac_enabled = kvmppc_get_msr(vcpu) & MSR_TM;
 986                 break;
 987         default:
 988                 guest_fac_enabled = false;
 989                 break;
 990         }
 991
 992         if (!guest_fac_enabled) {
 993                 /* Facility not enabled by the guest */
 994                 kvmppc_trigger_fac_interrupt(vcpu, fac);
 995                 return RESUME_GUEST;
 996         }
 997
 998         switch (fac) {
 999         case FSCR_TAR_LG:
1000                 /* TAR switching isn't lazy in Linux yet */
1001                 current->thread.tar = mfspr(SPRN_TAR);
1002                 mtspr(SPRN_TAR, vcpu->arch.tar);
1003                 vcpu->arch.shadow_fscr |= FSCR_TAR;
1004                 break;
1005         default:
1006                 kvmppc_emulate_fac(vcpu, fac);
1007                 break;
1008         }
1009
1010 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1011         /* Since we disabled MSR_TM at privilege state, the mfspr instruction
1012          * for TM spr can trigger TM fac unavailable. In this case, the
1013          * emulation is handled by kvmppc_emulate_fac(), which invokes
1014          * kvmppc_emulate_mfspr() finally. But note the mfspr can include
1015          * RT for NV registers. So it need to restore those NV reg to reflect
1016          * the update.
1017          */
1018         if ((fac == FSCR_TM_LG) && !(kvmppc_get_msr(vcpu) & MSR_PR))
1019                 return RESUME_GUEST_NV;
1020 #endif
1021
1022         return RESUME_GUEST;
1023 }
1024
1025 void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr)
1026 {
1027         if ((vcpu->arch.fscr & FSCR_TAR) && !(fscr & FSCR_TAR)) {
1028                 /* TAR got dropped, drop it in shadow too */
1029                 kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
1030         } else if (!(vcpu->arch.fscr & FSCR_TAR) && (fscr & FSCR_TAR)) {
1031                 vcpu->arch.fscr = fscr;
1032                 kvmppc_handle_fac(vcpu, FSCR_TAR_LG);
1033                 return;
1034         }
1035
1036         vcpu->arch.fscr = fscr;
1037 }
1038 #endif
1039
1040 static void kvmppc_setup_debug(struct kvm_vcpu *vcpu)
1041 {
1042         if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
1043                 u64 msr = kvmppc_get_msr(vcpu);
1044
1045                 kvmppc_set_msr(vcpu, msr | MSR_SE);
1046         }
1047 }
1048
1049 static void kvmppc_clear_debug(struct kvm_vcpu *vcpu)
1050 {
1051         if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
1052                 u64 msr = kvmppc_get_msr(vcpu);
1053
1054                 kvmppc_set_msr(vcpu, msr & ~MSR_SE);
1055         }
1056 }
1057
1058 static int kvmppc_exit_pr_progint(struct kvm_run *run, struct kvm_vcpu *vcpu,
1059                                   unsigned int exit_nr)
1060 {
1061         enum emulation_result er;
1062         ulong flags;
1063         u32 last_inst;
1064         int emul, r;
1065
1066         /*
1067          * shadow_srr1 only contains valid flags if we came here via a program
1068          * exception. The other exceptions (emulation assist, FP unavailable,
1069          * etc.) do not provide flags in SRR1, so use an illegal-instruction
1070          * exception when injecting a program interrupt into the guest.
1071          */
1072         if (exit_nr == BOOK3S_INTERRUPT_PROGRAM)
1073                 flags = vcpu->arch.shadow_srr1 & 0x1f0000ull;
1074         else
1075                 flags = SRR1_PROGILL;
1076
1077         emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1078         if (emul != EMULATE_DONE)
1079                 return RESUME_GUEST;
1080
1081         if (kvmppc_get_msr(vcpu) & MSR_PR) {
1082 #ifdef EXIT_DEBUG
1083                 pr_info("Userspace triggered 0x700 exception at\n 0x%lx (0x%x)\n",
1084                         kvmppc_get_pc(vcpu), last_inst);
1085 #endif
1086                 if ((last_inst & 0xff0007ff) != (INS_DCBZ & 0xfffffff7)) {
1087                         kvmppc_core_queue_program(vcpu, flags);
1088                         return RESUME_GUEST;
1089                 }
1090         }
1091
1092         vcpu->stat.emulated_inst_exits++;
1093         er = kvmppc_emulate_instruction(run, vcpu);
1094         switch (er) {
1095         case EMULATE_DONE:
1096                 r = RESUME_GUEST_NV;
1097                 break;
1098         case EMULATE_AGAIN:
1099                 r = RESUME_GUEST;
1100                 break;
1101         case EMULATE_FAIL:
1102                 pr_crit("%s: emulation at %lx failed (%08x)\n",
1103                         __func__, kvmppc_get_pc(vcpu), last_inst);
1104                 kvmppc_core_queue_program(vcpu, flags);
1105                 r = RESUME_GUEST;
1106                 break;
1107         case EMULATE_DO_MMIO:
1108                 run->exit_reason = KVM_EXIT_MMIO;
1109                 r = RESUME_HOST_NV;
1110                 break;
1111         case EMULATE_EXIT_USER:
1112                 r = RESUME_HOST_NV;
1113                 break;
1114         default:
1115                 BUG();
1116         }
1117
1118         return r;
1119 }
1120
1121 int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
1122                           unsigned int exit_nr)
1123 {
1124         int r = RESUME_HOST;
1125         int s;
1126
1127         vcpu->stat.sum_exits++;
1128
1129         run->exit_reason = KVM_EXIT_UNKNOWN;
1130         run->ready_for_interrupt_injection = 1;
1131
1132         /* We get here with MSR.EE=1 */
1133
1134         trace_kvm_exit(exit_nr, vcpu);
1135         guest_exit();
1136
1137         switch (exit_nr) {
1138         case BOOK3S_INTERRUPT_INST_STORAGE:
1139         {
1140                 ulong shadow_srr1 = vcpu->arch.shadow_srr1;
1141                 vcpu->stat.pf_instruc++;
1142
1143                 if (kvmppc_is_split_real(vcpu))
1144                         kvmppc_fixup_split_real(vcpu);
1145
1146 #ifdef CONFIG_PPC_BOOK3S_32
1147                 /* We set segments as unused segments when invalidating them. So
1148                  * treat the respective fault as segment fault. */
1149                 {
1150                         struct kvmppc_book3s_shadow_vcpu *svcpu;
1151                         u32 sr;
1152
1153                         svcpu = svcpu_get(vcpu);
1154                         sr = svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT];
1155                         svcpu_put(svcpu);
1156                         if (sr == SR_INVALID) {
1157                                 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
1158                                 r = RESUME_GUEST;
1159                                 break;
1160                         }
1161                 }
1162 #endif
1163
1164                 /* only care about PTEG not found errors, but leave NX alone */
1165                 if (shadow_srr1 & 0x40000000) {
1166                         int idx = srcu_read_lock(&vcpu->kvm->srcu);
1167                         r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
1168                         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1169                         vcpu->stat.sp_instruc++;
1170                 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
1171                           (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
1172                         /*
1173                          * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
1174                          *     so we can't use the NX bit inside the guest. Let's cross our fingers,
1175                          *     that no guest that needs the dcbz hack does NX.
1176                          */
1177                         kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
1178                         r = RESUME_GUEST;
1179                 } else {
1180                         kvmppc_core_queue_inst_storage(vcpu,
1181                                                 shadow_srr1 & 0x58000000);
1182                         r = RESUME_GUEST;
1183                 }
1184                 break;
1185         }
1186         case BOOK3S_INTERRUPT_DATA_STORAGE:
1187         {
1188                 ulong dar = kvmppc_get_fault_dar(vcpu);
1189                 u32 fault_dsisr = vcpu->arch.fault_dsisr;
1190                 vcpu->stat.pf_storage++;
1191
1192 #ifdef CONFIG_PPC_BOOK3S_32
1193                 /* We set segments as unused segments when invalidating them. So
1194                  * treat the respective fault as segment fault. */
1195                 {
1196                         struct kvmppc_book3s_shadow_vcpu *svcpu;
1197                         u32 sr;
1198
1199                         svcpu = svcpu_get(vcpu);
1200                         sr = svcpu->sr[dar >> SID_SHIFT];
1201                         svcpu_put(svcpu);
1202                         if (sr == SR_INVALID) {
1203                                 kvmppc_mmu_map_segment(vcpu, dar);
1204                                 r = RESUME_GUEST;
1205                                 break;
1206                         }
1207                 }
1208 #endif
1209
1210                 /*
1211                  * We need to handle missing shadow PTEs, and
1212                  * protection faults due to us mapping a page read-only
1213                  * when the guest thinks it is writable.
1214                  */
1215                 if (fault_dsisr & (DSISR_NOHPTE | DSISR_PROTFAULT)) {
1216                         int idx = srcu_read_lock(&vcpu->kvm->srcu);
1217                         r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
1218                         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1219                 } else {
1220                         kvmppc_core_queue_data_storage(vcpu, dar, fault_dsisr);
1221                         r = RESUME_GUEST;
1222                 }
1223                 break;
1224         }
1225         case BOOK3S_INTERRUPT_DATA_SEGMENT:
1226                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
1227                         kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
1228                         kvmppc_book3s_queue_irqprio(vcpu,
1229                                 BOOK3S_INTERRUPT_DATA_SEGMENT);
1230                 }
1231                 r = RESUME_GUEST;
1232                 break;
1233         case BOOK3S_INTERRUPT_INST_SEGMENT:
1234                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
1235                         kvmppc_book3s_queue_irqprio(vcpu,
1236                                 BOOK3S_INTERRUPT_INST_SEGMENT);
1237                 }
1238                 r = RESUME_GUEST;
1239                 break;
1240         /* We're good on these - the host merely wanted to get our attention */
1241         case BOOK3S_INTERRUPT_DECREMENTER:
1242         case BOOK3S_INTERRUPT_HV_DECREMENTER:
1243         case BOOK3S_INTERRUPT_DOORBELL:
1244         case BOOK3S_INTERRUPT_H_DOORBELL:
1245                 vcpu->stat.dec_exits++;
1246                 r = RESUME_GUEST;
1247                 break;
1248         case BOOK3S_INTERRUPT_EXTERNAL:
1249         case BOOK3S_INTERRUPT_EXTERNAL_HV:
1250         case BOOK3S_INTERRUPT_H_VIRT:
1251                 vcpu->stat.ext_intr_exits++;
1252                 r = RESUME_GUEST;
1253                 break;
1254         case BOOK3S_INTERRUPT_HMI:
1255         case BOOK3S_INTERRUPT_PERFMON:
1256         case BOOK3S_INTERRUPT_SYSTEM_RESET:
1257                 r = RESUME_GUEST;
1258                 break;
1259         case BOOK3S_INTERRUPT_PROGRAM:
1260         case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
1261                 r = kvmppc_exit_pr_progint(run, vcpu, exit_nr);
1262                 break;
1263         case BOOK3S_INTERRUPT_SYSCALL:
1264         {
1265                 u32 last_sc;
1266                 int emul;
1267
1268                 /* Get last sc for papr */
1269                 if (vcpu->arch.papr_enabled) {
1270                         /* The sc instuction points SRR0 to the next inst */
1271                         emul = kvmppc_get_last_inst(vcpu, INST_SC, &last_sc);
1272                         if (emul != EMULATE_DONE) {
1273                                 kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) - 4);
1274                                 r = RESUME_GUEST;
1275                                 break;
1276                         }
1277                 }
1278
1279                 if (vcpu->arch.papr_enabled &&
1280                     (last_sc == 0x44000022) &&
1281                     !(kvmppc_get_msr(vcpu) & MSR_PR)) {
1282                         /* SC 1 papr hypercalls */
1283                         ulong cmd = kvmppc_get_gpr(vcpu, 3);
1284                         int i;
1285
1286 #ifdef CONFIG_PPC_BOOK3S_64
1287                         if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
1288                                 r = RESUME_GUEST;
1289                                 break;
1290                         }
1291 #endif
1292
1293                         run->papr_hcall.nr = cmd;
1294                         for (i = 0; i < 9; ++i) {
1295                                 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
1296                                 run->papr_hcall.args[i] = gpr;
1297                         }
1298                         run->exit_reason = KVM_EXIT_PAPR_HCALL;
1299                         vcpu->arch.hcall_needed = 1;
1300                         r = RESUME_HOST;
1301                 } else if (vcpu->arch.osi_enabled &&
1302                     (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
1303                     (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
1304                         /* MOL hypercalls */
1305                         u64 *gprs = run->osi.gprs;
1306                         int i;
1307
1308                         run->exit_reason = KVM_EXIT_OSI;
1309                         for (i = 0; i < 32; i++)
1310                                 gprs[i] = kvmppc_get_gpr(vcpu, i);
1311                         vcpu->arch.osi_needed = 1;
1312                         r = RESUME_HOST_NV;
1313                 } else if (!(kvmppc_get_msr(vcpu) & MSR_PR) &&
1314                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1315                         /* KVM PV hypercalls */
1316                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1317                         r = RESUME_GUEST;
1318                 } else {
1319                         /* Guest syscalls */
1320                         vcpu->stat.syscall_exits++;
1321                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1322                         r = RESUME_GUEST;
1323                 }
1324                 break;
1325         }
1326         case BOOK3S_INTERRUPT_FP_UNAVAIL:
1327         case BOOK3S_INTERRUPT_ALTIVEC:
1328         case BOOK3S_INTERRUPT_VSX:
1329         {
1330                 int ext_msr = 0;
1331                 int emul;
1332                 u32 last_inst;
1333
1334                 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE) {
1335                         /* Do paired single instruction emulation */
1336                         emul = kvmppc_get_last_inst(vcpu, INST_GENERIC,
1337                                                     &last_inst);
1338                         if (emul == EMULATE_DONE)
1339                                 r = kvmppc_exit_pr_progint(run, vcpu, exit_nr);
1340                         else
1341                                 r = RESUME_GUEST;
1342
1343                         break;
1344                 }
1345
1346                 /* Enable external provider */
1347                 switch (exit_nr) {
1348                 case BOOK3S_INTERRUPT_FP_UNAVAIL:
1349                         ext_msr = MSR_FP;
1350                         break;
1351
1352                 case BOOK3S_INTERRUPT_ALTIVEC:
1353                         ext_msr = MSR_VEC;
1354                         break;
1355
1356                 case BOOK3S_INTERRUPT_VSX:
1357                         ext_msr = MSR_VSX;
1358                         break;
1359                 }
1360
1361                 r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
1362                 break;
1363         }
1364         case BOOK3S_INTERRUPT_ALIGNMENT:
1365         {
1366                 u32 last_inst;
1367                 int emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1368
1369                 if (emul == EMULATE_DONE) {
1370                         u32 dsisr;
1371                         u64 dar;
1372
1373                         dsisr = kvmppc_alignment_dsisr(vcpu, last_inst);
1374                         dar = kvmppc_alignment_dar(vcpu, last_inst);
1375
1376                         kvmppc_set_dsisr(vcpu, dsisr);
1377                         kvmppc_set_dar(vcpu, dar);
1378
1379                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1380                 }
1381                 r = RESUME_GUEST;
1382                 break;
1383         }
1384 #ifdef CONFIG_PPC_BOOK3S_64
1385         case BOOK3S_INTERRUPT_FAC_UNAVAIL:
1386                 r = kvmppc_handle_fac(vcpu, vcpu->arch.shadow_fscr >> 56);
1387                 break;
1388 #endif
1389         case BOOK3S_INTERRUPT_MACHINE_CHECK:
1390                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1391                 r = RESUME_GUEST;
1392                 break;
1393         case BOOK3S_INTERRUPT_TRACE:
1394                 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
1395                         run->exit_reason = KVM_EXIT_DEBUG;
1396                         r = RESUME_HOST;
1397                 } else {
1398                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1399                         r = RESUME_GUEST;
1400                 }
1401                 break;
1402         default:
1403         {
1404                 ulong shadow_srr1 = vcpu->arch.shadow_srr1;
1405                 /* Ugh - bork here! What did we get? */
1406                 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
1407                         exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
1408                 r = RESUME_HOST;
1409                 BUG();
1410                 break;
1411         }
1412         }
1413
1414         if (!(r & RESUME_HOST)) {
1415                 /* To avoid clobbering exit_reason, only check for signals if
1416                  * we aren't already exiting to userspace for some other
1417                  * reason. */
1418
1419                 /*
1420                  * Interrupts could be timers for the guest which we have to
1421                  * inject again, so let's postpone them until we're in the guest
1422                  * and if we really did time things so badly, then we just exit
1423                  * again due to a host external interrupt.
1424                  */
1425                 s = kvmppc_prepare_to_enter(vcpu);
1426                 if (s <= 0)
1427                         r = s;
1428                 else {
1429                         /* interrupts now hard-disabled */
1430                         kvmppc_fix_ee_before_entry();
1431                 }
1432
1433                 kvmppc_handle_lost_ext(vcpu);
1434         }
1435
1436         trace_kvm_book3s_reenter(r, vcpu);
1437
1438         return r;
1439 }
1440
1441 static int kvm_arch_vcpu_ioctl_get_sregs_pr(struct kvm_vcpu *vcpu,
1442                                             struct kvm_sregs *sregs)
1443 {
1444         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1445         int i;
1446
1447         sregs->pvr = vcpu->arch.pvr;
1448
1449         sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
1450         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1451                 for (i = 0; i < 64; i++) {
1452                         sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
1453                         sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
1454                 }
1455         } else {
1456                 for (i = 0; i < 16; i++)
1457                         sregs->u.s.ppc32.sr[i] = kvmppc_get_sr(vcpu, i);
1458
1459                 for (i = 0; i < 8; i++) {
1460                         sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
1461                         sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
1462                 }
1463         }
1464
1465         return 0;
1466 }
1467
1468 static int kvm_arch_vcpu_ioctl_set_sregs_pr(struct kvm_vcpu *vcpu,
1469                                             struct kvm_sregs *sregs)
1470 {
1471         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1472         int i;
1473
1474         kvmppc_set_pvr_pr(vcpu, sregs->pvr);
1475
1476         vcpu3s->sdr1 = sregs->u.s.sdr1;
1477 #ifdef CONFIG_PPC_BOOK3S_64
1478         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1479                 /* Flush all SLB entries */
1480                 vcpu->arch.mmu.slbmte(vcpu, 0, 0);
1481                 vcpu->arch.mmu.slbia(vcpu);
1482
1483                 for (i = 0; i < 64; i++) {
1484                         u64 rb = sregs->u.s.ppc64.slb[i].slbe;
1485                         u64 rs = sregs->u.s.ppc64.slb[i].slbv;
1486
1487                         if (rb & SLB_ESID_V)
1488                                 vcpu->arch.mmu.slbmte(vcpu, rs, rb);
1489                 }
1490         } else
1491 #endif
1492         {
1493                 for (i = 0; i < 16; i++) {
1494                         vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
1495                 }
1496                 for (i = 0; i < 8; i++) {
1497                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
1498                                        (u32)sregs->u.s.ppc32.ibat[i]);
1499                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
1500                                        (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
1501                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
1502                                        (u32)sregs->u.s.ppc32.dbat[i]);
1503                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
1504                                        (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
1505                 }
1506         }
1507
1508         /* Flush the MMU after messing with the segments */
1509         kvmppc_mmu_pte_flush(vcpu, 0, 0);
1510
1511         return 0;
1512 }
1513
1514 static int kvmppc_get_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
1515                                  union kvmppc_one_reg *val)
1516 {
1517         int r = 0;
1518
1519         switch (id) {
1520         case KVM_REG_PPC_DEBUG_INST:
1521                 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1522                 break;
1523         case KVM_REG_PPC_HIOR:
1524                 *val = get_reg_val(id, to_book3s(vcpu)->hior);
1525                 break;
1526         case KVM_REG_PPC_VTB:
1527                 *val = get_reg_val(id, to_book3s(vcpu)->vtb);
1528                 break;
1529         case KVM_REG_PPC_LPCR:
1530         case KVM_REG_PPC_LPCR_64:
1531                 /*
1532                  * We are only interested in the LPCR_ILE bit
1533                  */
1534                 if (vcpu->arch.intr_msr & MSR_LE)
1535                         *val = get_reg_val(id, LPCR_ILE);
1536                 else
1537                         *val = get_reg_val(id, 0);
1538                 break;
1539 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1540         case KVM_REG_PPC_TFHAR:
1541                 *val = get_reg_val(id, vcpu->arch.tfhar);
1542                 break;
1543         case KVM_REG_PPC_TFIAR:
1544                 *val = get_reg_val(id, vcpu->arch.tfiar);
1545                 break;
1546         case KVM_REG_PPC_TEXASR:
1547                 *val = get_reg_val(id, vcpu->arch.texasr);
1548                 break;
1549         case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
1550                 *val = get_reg_val(id,
1551                                 vcpu->arch.gpr_tm[id-KVM_REG_PPC_TM_GPR0]);
1552                 break;
1553         case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
1554         {
1555                 int i, j;
1556
1557                 i = id - KVM_REG_PPC_TM_VSR0;
1558                 if (i < 32)
1559                         for (j = 0; j < TS_FPRWIDTH; j++)
1560                                 val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j];
1561                 else {
1562                         if (cpu_has_feature(CPU_FTR_ALTIVEC))
1563                                 val->vval = vcpu->arch.vr_tm.vr[i-32];
1564                         else
1565                                 r = -ENXIO;
1566                 }
1567                 break;
1568         }
1569         case KVM_REG_PPC_TM_CR:
1570                 *val = get_reg_val(id, vcpu->arch.cr_tm);
1571                 break;
1572         case KVM_REG_PPC_TM_XER:
1573                 *val = get_reg_val(id, vcpu->arch.xer_tm);
1574                 break;
1575         case KVM_REG_PPC_TM_LR:
1576                 *val = get_reg_val(id, vcpu->arch.lr_tm);
1577                 break;
1578         case KVM_REG_PPC_TM_CTR:
1579                 *val = get_reg_val(id, vcpu->arch.ctr_tm);
1580                 break;
1581         case KVM_REG_PPC_TM_FPSCR:
1582                 *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr);
1583                 break;
1584         case KVM_REG_PPC_TM_AMR:
1585                 *val = get_reg_val(id, vcpu->arch.amr_tm);
1586                 break;
1587         case KVM_REG_PPC_TM_PPR:
1588                 *val = get_reg_val(id, vcpu->arch.ppr_tm);
1589                 break;
1590         case KVM_REG_PPC_TM_VRSAVE:
1591                 *val = get_reg_val(id, vcpu->arch.vrsave_tm);
1592                 break;
1593         case KVM_REG_PPC_TM_VSCR:
1594                 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1595                         *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]);
1596                 else
1597                         r = -ENXIO;
1598                 break;
1599         case KVM_REG_PPC_TM_DSCR:
1600                 *val = get_reg_val(id, vcpu->arch.dscr_tm);
1601                 break;
1602         case KVM_REG_PPC_TM_TAR:
1603                 *val = get_reg_val(id, vcpu->arch.tar_tm);
1604                 break;
1605 #endif
1606         default:
1607                 r = -EINVAL;
1608                 break;
1609         }
1610
1611         return r;
1612 }
1613
1614 static void kvmppc_set_lpcr_pr(struct kvm_vcpu *vcpu, u64 new_lpcr)
1615 {
1616         if (new_lpcr & LPCR_ILE)
1617                 vcpu->arch.intr_msr |= MSR_LE;
1618         else
1619                 vcpu->arch.intr_msr &= ~MSR_LE;
1620 }
1621
1622 static int kvmppc_set_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
1623                                  union kvmppc_one_reg *val)
1624 {
1625         int r = 0;
1626
1627         switch (id) {
1628         case KVM_REG_PPC_HIOR:
1629                 to_book3s(vcpu)->hior = set_reg_val(id, *val);
1630                 to_book3s(vcpu)->hior_explicit = true;
1631                 break;
1632         case KVM_REG_PPC_VTB:
1633                 to_book3s(vcpu)->vtb = set_reg_val(id, *val);
1634                 break;
1635         case KVM_REG_PPC_LPCR:
1636         case KVM_REG_PPC_LPCR_64:
1637                 kvmppc_set_lpcr_pr(vcpu, set_reg_val(id, *val));
1638                 break;
1639 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1640         case KVM_REG_PPC_TFHAR:
1641                 vcpu->arch.tfhar = set_reg_val(id, *val);
1642                 break;
1643         case KVM_REG_PPC_TFIAR:
1644                 vcpu->arch.tfiar = set_reg_val(id, *val);
1645                 break;
1646         case KVM_REG_PPC_TEXASR:
1647                 vcpu->arch.texasr = set_reg_val(id, *val);
1648                 break;
1649         case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
1650                 vcpu->arch.gpr_tm[id - KVM_REG_PPC_TM_GPR0] =
1651                         set_reg_val(id, *val);
1652                 break;
1653         case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
1654         {
1655                 int i, j;
1656
1657                 i = id - KVM_REG_PPC_TM_VSR0;
1658                 if (i < 32)
1659                         for (j = 0; j < TS_FPRWIDTH; j++)
1660                                 vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j];
1661                 else
1662                         if (cpu_has_feature(CPU_FTR_ALTIVEC))
1663                                 vcpu->arch.vr_tm.vr[i-32] = val->vval;
1664                         else
1665                                 r = -ENXIO;
1666                 break;
1667         }
1668         case KVM_REG_PPC_TM_CR:
1669                 vcpu->arch.cr_tm = set_reg_val(id, *val);
1670                 break;
1671         case KVM_REG_PPC_TM_XER:
1672                 vcpu->arch.xer_tm = set_reg_val(id, *val);
1673                 break;
1674         case KVM_REG_PPC_TM_LR:
1675                 vcpu->arch.lr_tm = set_reg_val(id, *val);
1676                 break;
1677         case KVM_REG_PPC_TM_CTR:
1678                 vcpu->arch.ctr_tm = set_reg_val(id, *val);
1679                 break;
1680         case KVM_REG_PPC_TM_FPSCR:
1681                 vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val);
1682                 break;
1683         case KVM_REG_PPC_TM_AMR:
1684                 vcpu->arch.amr_tm = set_reg_val(id, *val);
1685                 break;
1686         case KVM_REG_PPC_TM_PPR:
1687                 vcpu->arch.ppr_tm = set_reg_val(id, *val);
1688                 break;
1689         case KVM_REG_PPC_TM_VRSAVE:
1690                 vcpu->arch.vrsave_tm = set_reg_val(id, *val);
1691                 break;
1692         case KVM_REG_PPC_TM_VSCR:
1693                 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1694                         vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val);
1695                 else
1696                         r = -ENXIO;
1697                 break;
1698         case KVM_REG_PPC_TM_DSCR:
1699                 vcpu->arch.dscr_tm = set_reg_val(id, *val);
1700                 break;
1701         case KVM_REG_PPC_TM_TAR:
1702                 vcpu->arch.tar_tm = set_reg_val(id, *val);
1703                 break;
1704 #endif
1705         default:
1706                 r = -EINVAL;
1707                 break;
1708         }
1709
1710         return r;
1711 }
1712
1713 static struct kvm_vcpu *kvmppc_core_vcpu_create_pr(struct kvm *kvm,
1714                                                    unsigned int id)
1715 {
1716         struct kvmppc_vcpu_book3s *vcpu_book3s;
1717         struct kvm_vcpu *vcpu;
1718         int err = -ENOMEM;
1719         unsigned long p;
1720
1721         vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
1722         if (!vcpu)
1723                 goto out;
1724
1725         vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
1726         if (!vcpu_book3s)
1727                 goto free_vcpu;
1728         vcpu->arch.book3s = vcpu_book3s;
1729
1730 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1731         vcpu->arch.shadow_vcpu =
1732                 kzalloc(sizeof(*vcpu->arch.shadow_vcpu), GFP_KERNEL);
1733         if (!vcpu->arch.shadow_vcpu)
1734                 goto free_vcpu3s;
1735 #endif
1736
1737         err = kvm_vcpu_init(vcpu, kvm, id);
1738         if (err)
1739                 goto free_shadow_vcpu;
1740
1741         err = -ENOMEM;
1742         p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
1743         if (!p)
1744                 goto uninit_vcpu;
1745         vcpu->arch.shared = (void *)p;
1746 #ifdef CONFIG_PPC_BOOK3S_64
1747         /* Always start the shared struct in native endian mode */
1748 #ifdef __BIG_ENDIAN__
1749         vcpu->arch.shared_big_endian = true;
1750 #else
1751         vcpu->arch.shared_big_endian = false;
1752 #endif
1753
1754         /*
1755          * Default to the same as the host if we're on sufficiently
1756          * recent machine that we have 1TB segments;
1757          * otherwise default to PPC970FX.
1758          */
1759         vcpu->arch.pvr = 0x3C0301;
1760         if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
1761                 vcpu->arch.pvr = mfspr(SPRN_PVR);
1762         vcpu->arch.intr_msr = MSR_SF;
1763 #else
1764         /* default to book3s_32 (750) */
1765         vcpu->arch.pvr = 0x84202;
1766 #endif
1767         kvmppc_set_pvr_pr(vcpu, vcpu->arch.pvr);
1768         vcpu->arch.slb_nr = 64;
1769
1770         vcpu->arch.shadow_msr = MSR_USER64 & ~MSR_LE;
1771
1772         err = kvmppc_mmu_init(vcpu);
1773         if (err < 0)
1774                 goto uninit_vcpu;
1775
1776         return vcpu;
1777
1778 uninit_vcpu:
1779         kvm_vcpu_uninit(vcpu);
1780 free_shadow_vcpu:
1781 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1782         kfree(vcpu->arch.shadow_vcpu);
1783 free_vcpu3s:
1784 #endif
1785         vfree(vcpu_book3s);
1786 free_vcpu:
1787         kmem_cache_free(kvm_vcpu_cache, vcpu);
1788 out:
1789         return ERR_PTR(err);
1790 }
1791
1792 static void kvmppc_core_vcpu_free_pr(struct kvm_vcpu *vcpu)
1793 {
1794         struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1795
1796         free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
1797         kvm_vcpu_uninit(vcpu);
1798 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1799         kfree(vcpu->arch.shadow_vcpu);
1800 #endif
1801         vfree(vcpu_book3s);
1802         kmem_cache_free(kvm_vcpu_cache, vcpu);
1803 }
1804
1805 static int kvmppc_vcpu_run_pr(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1806 {
1807         int ret;
1808 #ifdef CONFIG_ALTIVEC
1809         unsigned long uninitialized_var(vrsave);
1810 #endif
1811
1812         /* Check if we can run the vcpu at all */
1813         if (!vcpu->arch.sane) {
1814                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1815                 ret = -EINVAL;
1816                 goto out;
1817         }
1818
1819         kvmppc_setup_debug(vcpu);
1820
1821         /*
1822          * Interrupts could be timers for the guest which we have to inject
1823          * again, so let's postpone them until we're in the guest and if we
1824          * really did time things so badly, then we just exit again due to
1825          * a host external interrupt.
1826          */
1827         ret = kvmppc_prepare_to_enter(vcpu);
1828         if (ret <= 0)
1829                 goto out;
1830         /* interrupts now hard-disabled */
1831
1832         /* Save FPU, Altivec and VSX state */
1833         giveup_all(current);
1834
1835         /* Preload FPU if it's enabled */
1836         if (kvmppc_get_msr(vcpu) & MSR_FP)
1837                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1838
1839         kvmppc_fix_ee_before_entry();
1840
1841         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
1842
1843         kvmppc_clear_debug(vcpu);
1844
1845         /* No need for guest_exit. It's done in handle_exit.
1846            We also get here with interrupts enabled. */
1847
1848         /* Make sure we save the guest FPU/Altivec/VSX state */
1849         kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
1850
1851         /* Make sure we save the guest TAR/EBB/DSCR state */
1852         kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
1853
1854 out:
1855         vcpu->mode = OUTSIDE_GUEST_MODE;
1856         return ret;
1857 }
1858
1859 /*
1860  * Get (and clear) the dirty memory log for a memory slot.
1861  */
1862 static int kvm_vm_ioctl_get_dirty_log_pr(struct kvm *kvm,
1863                                          struct kvm_dirty_log *log)
1864 {
1865         struct kvm_memslots *slots;
1866         struct kvm_memory_slot *memslot;
1867         struct kvm_vcpu *vcpu;
1868         ulong ga, ga_end;
1869         int is_dirty = 0;
1870         int r;
1871         unsigned long n;
1872
1873         mutex_lock(&kvm->slots_lock);
1874
1875         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1876         if (r)
1877                 goto out;
1878
1879         /* If nothing is dirty, don't bother messing with page tables. */
1880         if (is_dirty) {
1881                 slots = kvm_memslots(kvm);
1882                 memslot = id_to_memslot(slots, log->slot);
1883
1884                 ga = memslot->base_gfn << PAGE_SHIFT;
1885                 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1886
1887                 kvm_for_each_vcpu(n, vcpu, kvm)
1888                         kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1889
1890                 n = kvm_dirty_bitmap_bytes(memslot);
1891                 memset(memslot->dirty_bitmap, 0, n);
1892         }
1893
1894         r = 0;
1895 out:
1896         mutex_unlock(&kvm->slots_lock);
1897         return r;
1898 }
1899
1900 static void kvmppc_core_flush_memslot_pr(struct kvm *kvm,
1901                                          struct kvm_memory_slot *memslot)
1902 {
1903         return;
1904 }
1905
1906 static int kvmppc_core_prepare_memory_region_pr(struct kvm *kvm,
1907                                         struct kvm_memory_slot *memslot,
1908                                         const struct kvm_userspace_memory_region *mem)
1909 {
1910         return 0;
1911 }
1912
1913 static void kvmppc_core_commit_memory_region_pr(struct kvm *kvm,
1914                                 const struct kvm_userspace_memory_region *mem,
1915                                 const struct kvm_memory_slot *old,
1916                                 const struct kvm_memory_slot *new)
1917 {
1918         return;
1919 }
1920
1921 static void kvmppc_core_free_memslot_pr(struct kvm_memory_slot *free,
1922                                         struct kvm_memory_slot *dont)
1923 {
1924         return;
1925 }
1926
1927 static int kvmppc_core_create_memslot_pr(struct kvm_memory_slot *slot,
1928                                          unsigned long npages)
1929 {
1930         return 0;
1931 }
1932
1933
1934 #ifdef CONFIG_PPC64
1935 static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
1936                                          struct kvm_ppc_smmu_info *info)
1937 {
1938         long int i;
1939         struct kvm_vcpu *vcpu;
1940
1941         info->flags = 0;
1942
1943         /* SLB is always 64 entries */
1944         info->slb_size = 64;
1945
1946         /* Standard 4k base page size segment */
1947         info->sps[0].page_shift = 12;
1948         info->sps[0].slb_enc = 0;
1949         info->sps[0].enc[0].page_shift = 12;
1950         info->sps[0].enc[0].pte_enc = 0;
1951
1952         /*
1953          * 64k large page size.
1954          * We only want to put this in if the CPUs we're emulating
1955          * support it, but unfortunately we don't have a vcpu easily
1956          * to hand here to test.  Just pick the first vcpu, and if
1957          * that doesn't exist yet, report the minimum capability,
1958          * i.e., no 64k pages.
1959          * 1T segment support goes along with 64k pages.
1960          */
1961         i = 1;
1962         vcpu = kvm_get_vcpu(kvm, 0);
1963         if (vcpu && (vcpu->arch.hflags & BOOK3S_HFLAG_MULTI_PGSIZE)) {
1964                 info->flags = KVM_PPC_1T_SEGMENTS;
1965                 info->sps[i].page_shift = 16;
1966                 info->sps[i].slb_enc = SLB_VSID_L | SLB_VSID_LP_01;
1967                 info->sps[i].enc[0].page_shift = 16;
1968                 info->sps[i].enc[0].pte_enc = 1;
1969                 ++i;
1970         }
1971
1972         /* Standard 16M large page size segment */
1973         info->sps[i].page_shift = 24;
1974         info->sps[i].slb_enc = SLB_VSID_L;
1975         info->sps[i].enc[0].page_shift = 24;
1976         info->sps[i].enc[0].pte_enc = 0;
1977
1978         return 0;
1979 }
1980
1981 static int kvm_configure_mmu_pr(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg)
1982 {
1983         if (!cpu_has_feature(CPU_FTR_ARCH_300))
1984                 return -ENODEV;
1985         /* Require flags and process table base and size to all be zero. */
1986         if (cfg->flags || cfg->process_table)
1987                 return -EINVAL;
1988         return 0;
1989 }
1990
1991 #else
1992 static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
1993                                          struct kvm_ppc_smmu_info *info)
1994 {
1995         /* We should not get called */
1996         BUG();
1997 }
1998 #endif /* CONFIG_PPC64 */
1999
2000 static unsigned int kvm_global_user_count = 0;
2001 static DEFINE_SPINLOCK(kvm_global_user_count_lock);
2002
2003 static int kvmppc_core_init_vm_pr(struct kvm *kvm)
2004 {
2005         mutex_init(&kvm->arch.hpt_mutex);
2006
2007 #ifdef CONFIG_PPC_BOOK3S_64
2008         /* Start out with the default set of hcalls enabled */
2009         kvmppc_pr_init_default_hcalls(kvm);
2010 #endif
2011
2012         if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
2013                 spin_lock(&kvm_global_user_count_lock);
2014                 if (++kvm_global_user_count == 1)
2015                         pseries_disable_reloc_on_exc();
2016                 spin_unlock(&kvm_global_user_count_lock);
2017         }
2018         return 0;
2019 }
2020
2021 static void kvmppc_core_destroy_vm_pr(struct kvm *kvm)
2022 {
2023 #ifdef CONFIG_PPC64
2024         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
2025 #endif
2026
2027         if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
2028                 spin_lock(&kvm_global_user_count_lock);
2029                 BUG_ON(kvm_global_user_count == 0);
2030                 if (--kvm_global_user_count == 0)
2031                         pseries_enable_reloc_on_exc();
2032                 spin_unlock(&kvm_global_user_count_lock);
2033         }
2034 }
2035
2036 static int kvmppc_core_check_processor_compat_pr(void)
2037 {
2038         /*
2039          * PR KVM can work on POWER9 inside a guest partition
2040          * running in HPT mode.  It can't work if we are using
2041          * radix translation (because radix provides no way for
2042          * a process to have unique translations in quadrant 3).
2043          */
2044         if (cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled())
2045                 return -EIO;
2046         return 0;
2047 }
2048
2049 static long kvm_arch_vm_ioctl_pr(struct file *filp,
2050                                  unsigned int ioctl, unsigned long arg)
2051 {
2052         return -ENOTTY;
2053 }
2054
2055 static struct kvmppc_ops kvm_ops_pr = {
2056         .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_pr,
2057         .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_pr,
2058         .get_one_reg = kvmppc_get_one_reg_pr,
2059         .set_one_reg = kvmppc_set_one_reg_pr,
2060         .vcpu_load   = kvmppc_core_vcpu_load_pr,
2061         .vcpu_put    = kvmppc_core_vcpu_put_pr,
2062         .set_msr     = kvmppc_set_msr_pr,
2063         .vcpu_run    = kvmppc_vcpu_run_pr,
2064         .vcpu_create = kvmppc_core_vcpu_create_pr,
2065         .vcpu_free   = kvmppc_core_vcpu_free_pr,
2066         .check_requests = kvmppc_core_check_requests_pr,
2067         .get_dirty_log = kvm_vm_ioctl_get_dirty_log_pr,
2068         .flush_memslot = kvmppc_core_flush_memslot_pr,
2069         .prepare_memory_region = kvmppc_core_prepare_memory_region_pr,
2070         .commit_memory_region = kvmppc_core_commit_memory_region_pr,
2071         .unmap_hva_range = kvm_unmap_hva_range_pr,
2072         .age_hva  = kvm_age_hva_pr,
2073         .test_age_hva = kvm_test_age_hva_pr,
2074         .set_spte_hva = kvm_set_spte_hva_pr,
2075         .mmu_destroy  = kvmppc_mmu_destroy_pr,
2076         .free_memslot = kvmppc_core_free_memslot_pr,
2077         .create_memslot = kvmppc_core_create_memslot_pr,
2078         .init_vm = kvmppc_core_init_vm_pr,
2079         .destroy_vm = kvmppc_core_destroy_vm_pr,
2080         .get_smmu_info = kvm_vm_ioctl_get_smmu_info_pr,
2081         .emulate_op = kvmppc_core_emulate_op_pr,
2082         .emulate_mtspr = kvmppc_core_emulate_mtspr_pr,
2083         .emulate_mfspr = kvmppc_core_emulate_mfspr_pr,
2084         .fast_vcpu_kick = kvm_vcpu_kick,
2085         .arch_vm_ioctl  = kvm_arch_vm_ioctl_pr,
2086 #ifdef CONFIG_PPC_BOOK3S_64
2087         .hcall_implemented = kvmppc_hcall_impl_pr,
2088         .configure_mmu = kvm_configure_mmu_pr,
2089 #endif
2090         .giveup_ext = kvmppc_giveup_ext,
2091 };
2092
2093
2094 int kvmppc_book3s_init_pr(void)
2095 {
2096         int r;
2097
2098         r = kvmppc_core_check_processor_compat_pr();
2099         if (r < 0)
2100                 return r;
2101
2102         kvm_ops_pr.owner = THIS_MODULE;
2103         kvmppc_pr_ops = &kvm_ops_pr;
2104
2105         r = kvmppc_mmu_hpte_sysinit();
2106         return r;
2107 }
2108
2109 void kvmppc_book3s_exit_pr(void)
2110 {
2111         kvmppc_pr_ops = NULL;
2112         kvmppc_mmu_hpte_sysexit();
2113 }
2114
2115 /*
2116  * We only support separate modules for book3s 64
2117  */
2118 #ifdef CONFIG_PPC_BOOK3S_64
2119
2120 module_init(kvmppc_book3s_init_pr);
2121 module_exit(kvmppc_book3s_exit_pr);
2122
2123 MODULE_LICENSE("GPL");
2124 MODULE_ALIAS_MISCDEV(KVM_MINOR);
2125 MODULE_ALIAS("devname:kvm");
2126 #endif