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         case PVR_POWER9:
 591                 vcpu->arch.hflags |= BOOK3S_HFLAG_MULTI_PGSIZE |
 592                         BOOK3S_HFLAG_NEW_TLBIE;
 593                 break;
 594         }
 595
 596 #ifdef CONFIG_PPC_BOOK3S_32
 597         /* 32 bit Book3S always has 32 byte dcbz */
 598         vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 599 #endif
 600
 601         /* On some CPUs we can execute paired single operations natively */
 602         asm ( "mfpvr %0" : "=r"(host_pvr));
 603         switch (host_pvr) {
 604         case 0x00080200:        /* lonestar 2.0 */
 605         case 0x00088202:        /* lonestar 2.2 */
 606         case 0x70000100:        /* gekko 1.0 */
 607         case 0x00080100:        /* gekko 2.0 */
 608         case 0x00083203:        /* gekko 2.3a */
 609         case 0x00083213:        /* gekko 2.3b */
 610         case 0x00083204:        /* gekko 2.4 */
 611         case 0x00083214:        /* gekko 2.4e (8SE) - retail HW2 */
 612         case 0x00087200:        /* broadway */
 613                 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
 614                 /* Enable HID2.PSE - in case we need it later */
 615                 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
 616         }
 617 }
 618
 619 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
 620  * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
 621  * emulate 32 bytes dcbz length.
 622  *
 623  * The Book3s_64 inventors also realized this case and implemented a special bit
 624  * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
 625  *
 626  * My approach here is to patch the dcbz instruction on executing pages.
 627  */
 628 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
 629 {
 630         struct page *hpage;
 631         u64 hpage_offset;
 632         u32 *page;
 633         int i;
 634
 635         hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 636         if (is_error_page(hpage))
 637                 return;
 638
 639         hpage_offset = pte->raddr & ~PAGE_MASK;
 640         hpage_offset &= ~0xFFFULL;
 641         hpage_offset /= 4;
 642
 643         get_page(hpage);
 644         page = kmap_atomic(hpage);
 645
 646         /* patch dcbz into reserved instruction, so we trap */
 647         for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
 648                 if ((be32_to_cpu(page[i]) & 0xff0007ff) == INS_DCBZ)
 649                         page[i] &= cpu_to_be32(0xfffffff7);
 650
 651         kunmap_atomic(page);
 652         put_page(hpage);
 653 }
 654
 655 static bool kvmppc_visible_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
 656 {
 657         ulong mp_pa = vcpu->arch.magic_page_pa;
 658
 659         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 660                 mp_pa = (uint32_t)mp_pa;
 661
 662         gpa &= ~0xFFFULL;
 663         if (unlikely(mp_pa) && unlikely((mp_pa & KVM_PAM) == (gpa & KVM_PAM))) {
 664                 return true;
 665         }
 666
 667         return kvm_is_visible_gfn(vcpu->kvm, gpa >> PAGE_SHIFT);
 668 }
 669
 670 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
 671                             ulong eaddr, int vec)
 672 {
 673         bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
 674         bool iswrite = false;
 675         int r = RESUME_GUEST;
 676         int relocated;
 677         int page_found = 0;
 678         struct kvmppc_pte pte = { 0 };
 679         bool dr = (kvmppc_get_msr(vcpu) & MSR_DR) ? true : false;
 680         bool ir = (kvmppc_get_msr(vcpu) & MSR_IR) ? true : false;
 681         u64 vsid;
 682
 683         relocated = data ? dr : ir;
 684         if (data && (vcpu->arch.fault_dsisr & DSISR_ISSTORE))
 685                 iswrite = true;
 686
 687         /* Resolve real address if translation turned on */
 688         if (relocated) {
 689                 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data, iswrite);
 690         } else {
 691                 pte.may_execute = true;
 692                 pte.may_read = true;
 693                 pte.may_write = true;
 694                 pte.raddr = eaddr & KVM_PAM;
 695                 pte.eaddr = eaddr;
 696                 pte.vpage = eaddr >> 12;
 697                 pte.page_size = MMU_PAGE_64K;
 698                 pte.wimg = HPTE_R_M;
 699         }
 700
 701         switch (kvmppc_get_msr(vcpu) & (MSR_DR|MSR_IR)) {
 702         case 0:
 703                 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
 704                 break;
 705         case MSR_DR:
 706                 if (!data &&
 707                     (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 708                     ((pte.raddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 709                         pte.raddr &= ~SPLIT_HACK_MASK;
 710                 /* fall through */
 711         case MSR_IR:
 712                 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
 713
 714                 if ((kvmppc_get_msr(vcpu) & (MSR_DR|MSR_IR)) == MSR_DR)
 715                         pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
 716                 else
 717                         pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
 718                 pte.vpage |= vsid;
 719
 720                 if (vsid == -1)
 721                         page_found = -EINVAL;
 722                 break;
 723         }
 724
 725         if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 726            (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
 727                 /*
 728                  * If we do the dcbz hack, we have to NX on every execution,
 729                  * so we can patch the executing code. This renders our guest
 730                  * NX-less.
 731                  */
 732                 pte.may_execute = !data;
 733         }
 734
 735         if (page_found == -ENOENT || page_found == -EPERM) {
 736                 /* Page not found in guest PTE entries, or protection fault */
 737                 u64 flags;
 738
 739                 if (page_found == -EPERM)
 740                         flags = DSISR_PROTFAULT;
 741                 else
 742                         flags = DSISR_NOHPTE;
 743                 if (data) {
 744                         flags |= vcpu->arch.fault_dsisr & DSISR_ISSTORE;
 745                         kvmppc_core_queue_data_storage(vcpu, eaddr, flags);
 746                 } else {
 747                         kvmppc_core_queue_inst_storage(vcpu, flags);
 748                 }
 749         } else if (page_found == -EINVAL) {
 750                 /* Page not found in guest SLB */
 751                 kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
 752                 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
 753         } else if (kvmppc_visible_gpa(vcpu, pte.raddr)) {
 754                 if (data && !(vcpu->arch.fault_dsisr & DSISR_NOHPTE)) {
 755                         /*
 756                          * There is already a host HPTE there, presumably
 757                          * a read-only one for a page the guest thinks
 758                          * is writable, so get rid of it first.
 759                          */
 760                         kvmppc_mmu_unmap_page(vcpu, &pte);
 761                 }
 762                 /* The guest's PTE is not mapped yet. Map on the host */
 763                 if (kvmppc_mmu_map_page(vcpu, &pte, iswrite) == -EIO) {
 764                         /* Exit KVM if mapping failed */
 765                         run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 766                         return RESUME_HOST;
 767                 }
 768                 if (data)
 769                         vcpu->stat.sp_storage++;
 770                 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 771                          (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
 772                         kvmppc_patch_dcbz(vcpu, &pte);
 773         } else {
 774                 /* MMIO */
 775                 vcpu->stat.mmio_exits++;
 776                 vcpu->arch.paddr_accessed = pte.raddr;
 777                 vcpu->arch.vaddr_accessed = pte.eaddr;
 778                 r = kvmppc_emulate_mmio(run, vcpu);
 779                 if ( r == RESUME_HOST_NV )
 780                         r = RESUME_HOST;
 781         }
 782
 783         return r;
 784 }
 785
 786 /* Give up external provider (FPU, Altivec, VSX) */
 787 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
 788 {
 789         struct thread_struct *t = &current->thread;
 790
 791         /*
 792          * VSX instructions can access FP and vector registers, so if
 793          * we are giving up VSX, make sure we give up FP and VMX as well.
 794          */
 795         if (msr & MSR_VSX)
 796                 msr |= MSR_FP | MSR_VEC;
 797
 798         msr &= vcpu->arch.guest_owned_ext;
 799         if (!msr)
 800                 return;
 801
 802 #ifdef DEBUG_EXT
 803         printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
 804 #endif
 805
 806         if (msr & MSR_FP) {
 807                 /*
 808                  * Note that on CPUs with VSX, giveup_fpu stores
 809                  * both the traditional FP registers and the added VSX
 810                  * registers into thread.fp_state.fpr[].
 811                  */
 812                 if (t->regs->msr & MSR_FP)
 813                         giveup_fpu(current);
 814                 t->fp_save_area = NULL;
 815         }
 816
 817 #ifdef CONFIG_ALTIVEC
 818         if (msr & MSR_VEC) {
 819                 if (current->thread.regs->msr & MSR_VEC)
 820                         giveup_altivec(current);
 821                 t->vr_save_area = NULL;
 822         }
 823 #endif
 824
 825         vcpu->arch.guest_owned_ext &= ~(msr | MSR_VSX);
 826         kvmppc_recalc_shadow_msr(vcpu);
 827 }
 828
 829 /* Give up facility (TAR / EBB / DSCR) */
 830 void kvmppc_giveup_fac(struct kvm_vcpu *vcpu, ulong fac)
 831 {
 832 #ifdef CONFIG_PPC_BOOK3S_64
 833         if (!(vcpu->arch.shadow_fscr & (1ULL << fac))) {
 834                 /* Facility not available to the guest, ignore giveup request*/
 835                 return;
 836         }
 837
 838         switch (fac) {
 839         case FSCR_TAR_LG:
 840                 vcpu->arch.tar = mfspr(SPRN_TAR);
 841                 mtspr(SPRN_TAR, current->thread.tar);
 842                 vcpu->arch.shadow_fscr &= ~FSCR_TAR;
 843                 break;
 844         }
 845 #endif
 846 }
 847
 848 /* Handle external providers (FPU, Altivec, VSX) */
 849 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
 850                              ulong msr)
 851 {
 852         struct thread_struct *t = &current->thread;
 853
 854         /* When we have paired singles, we emulate in software */
 855         if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
 856                 return RESUME_GUEST;
 857
 858         if (!(kvmppc_get_msr(vcpu) & msr)) {
 859                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 860                 return RESUME_GUEST;
 861         }
 862
 863         if (msr == MSR_VSX) {
 864                 /* No VSX?  Give an illegal instruction interrupt */
 865 #ifdef CONFIG_VSX
 866                 if (!cpu_has_feature(CPU_FTR_VSX))
 867 #endif
 868                 {
 869                         kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
 870                         return RESUME_GUEST;
 871                 }
 872
 873                 /*
 874                  * We have to load up all the FP and VMX registers before
 875                  * we can let the guest use VSX instructions.
 876                  */
 877                 msr = MSR_FP | MSR_VEC | MSR_VSX;
 878         }
 879
 880         /* See if we already own all the ext(s) needed */
 881         msr &= ~vcpu->arch.guest_owned_ext;
 882         if (!msr)
 883                 return RESUME_GUEST;
 884
 885 #ifdef DEBUG_EXT
 886         printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
 887 #endif
 888
 889         if (msr & MSR_FP) {
 890                 preempt_disable();
 891                 enable_kernel_fp();
 892                 load_fp_state(&vcpu->arch.fp);
 893                 disable_kernel_fp();
 894                 t->fp_save_area = &vcpu->arch.fp;
 895                 preempt_enable();
 896         }
 897
 898         if (msr & MSR_VEC) {
 899 #ifdef CONFIG_ALTIVEC
 900                 preempt_disable();
 901                 enable_kernel_altivec();
 902                 load_vr_state(&vcpu->arch.vr);
 903                 disable_kernel_altivec();
 904                 t->vr_save_area = &vcpu->arch.vr;
 905                 preempt_enable();
 906 #endif
 907         }
 908
 909         t->regs->msr |= msr;
 910         vcpu->arch.guest_owned_ext |= msr;
 911         kvmppc_recalc_shadow_msr(vcpu);
 912
 913         return RESUME_GUEST;
 914 }
 915
 916 /*
 917  * Kernel code using FP or VMX could have flushed guest state to
 918  * the thread_struct; if so, get it back now.
 919  */
 920 static void kvmppc_handle_lost_ext(struct kvm_vcpu *vcpu)
 921 {
 922         unsigned long lost_ext;
 923
 924         lost_ext = vcpu->arch.guest_owned_ext & ~current->thread.regs->msr;
 925         if (!lost_ext)
 926                 return;
 927
 928         if (lost_ext & MSR_FP) {
 929                 preempt_disable();
 930                 enable_kernel_fp();
 931                 load_fp_state(&vcpu->arch.fp);
 932                 disable_kernel_fp();
 933                 preempt_enable();
 934         }
 935 #ifdef CONFIG_ALTIVEC
 936         if (lost_ext & MSR_VEC) {
 937                 preempt_disable();
 938                 enable_kernel_altivec();
 939                 load_vr_state(&vcpu->arch.vr);
 940                 disable_kernel_altivec();
 941                 preempt_enable();
 942         }
 943 #endif
 944         current->thread.regs->msr |= lost_ext;
 945 }
 946
 947 #ifdef CONFIG_PPC_BOOK3S_64
 948
 949 void kvmppc_trigger_fac_interrupt(struct kvm_vcpu *vcpu, ulong fac)
 950 {
 951         /* Inject the Interrupt Cause field and trigger a guest interrupt */
 952         vcpu->arch.fscr &= ~(0xffULL << 56);
 953         vcpu->arch.fscr |= (fac << 56);
 954         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_FAC_UNAVAIL);
 955 }
 956
 957 static void kvmppc_emulate_fac(struct kvm_vcpu *vcpu, ulong fac)
 958 {
 959         enum emulation_result er = EMULATE_FAIL;
 960
 961         if (!(kvmppc_get_msr(vcpu) & MSR_PR))
 962                 er = kvmppc_emulate_instruction(vcpu->run, vcpu);
 963
 964         if ((er != EMULATE_DONE) && (er != EMULATE_AGAIN)) {
 965                 /* Couldn't emulate, trigger interrupt in guest */
 966                 kvmppc_trigger_fac_interrupt(vcpu, fac);
 967         }
 968 }
 969
 970 /* Enable facilities (TAR, EBB, DSCR) for the guest */
 971 static int kvmppc_handle_fac(struct kvm_vcpu *vcpu, ulong fac)
 972 {
 973         bool guest_fac_enabled;
 974         BUG_ON(!cpu_has_feature(CPU_FTR_ARCH_207S));
 975
 976         /*
 977          * Not every facility is enabled by FSCR bits, check whether the
 978          * guest has this facility enabled at all.
 979          */
 980         switch (fac) {
 981         case FSCR_TAR_LG:
 982         case FSCR_EBB_LG:
 983                 guest_fac_enabled = (vcpu->arch.fscr & (1ULL << fac));
 984                 break;
 985         case FSCR_TM_LG:
 986                 guest_fac_enabled = kvmppc_get_msr(vcpu) & MSR_TM;
 987                 break;
 988         default:
 989                 guest_fac_enabled = false;
 990                 break;
 991         }
 992
 993         if (!guest_fac_enabled) {
 994                 /* Facility not enabled by the guest */
 995                 kvmppc_trigger_fac_interrupt(vcpu, fac);
 996                 return RESUME_GUEST;
 997         }
 998
 999         switch (fac) {
1000         case FSCR_TAR_LG:
1001                 /* TAR switching isn't lazy in Linux yet */
1002                 current->thread.tar = mfspr(SPRN_TAR);
1003                 mtspr(SPRN_TAR, vcpu->arch.tar);
1004                 vcpu->arch.shadow_fscr |= FSCR_TAR;
1005                 break;
1006         default:
1007                 kvmppc_emulate_fac(vcpu, fac);
1008                 break;
1009         }
1010
1011 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1012         /* Since we disabled MSR_TM at privilege state, the mfspr instruction
1013          * for TM spr can trigger TM fac unavailable. In this case, the
1014          * emulation is handled by kvmppc_emulate_fac(), which invokes
1015          * kvmppc_emulate_mfspr() finally. But note the mfspr can include
1016          * RT for NV registers. So it need to restore those NV reg to reflect
1017          * the update.
1018          */
1019         if ((fac == FSCR_TM_LG) && !(kvmppc_get_msr(vcpu) & MSR_PR))
1020                 return RESUME_GUEST_NV;
1021 #endif
1022
1023         return RESUME_GUEST;
1024 }
1025
1026 void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr)
1027 {
1028         if ((vcpu->arch.fscr & FSCR_TAR) && !(fscr & FSCR_TAR)) {
1029                 /* TAR got dropped, drop it in shadow too */
1030                 kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
1031         } else if (!(vcpu->arch.fscr & FSCR_TAR) && (fscr & FSCR_TAR)) {
1032                 vcpu->arch.fscr = fscr;
1033                 kvmppc_handle_fac(vcpu, FSCR_TAR_LG);
1034                 return;
1035         }
1036
1037         vcpu->arch.fscr = fscr;
1038 }
1039 #endif
1040
1041 static void kvmppc_setup_debug(struct kvm_vcpu *vcpu)
1042 {
1043         if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
1044                 u64 msr = kvmppc_get_msr(vcpu);
1045
1046                 kvmppc_set_msr(vcpu, msr | MSR_SE);
1047         }
1048 }
1049
1050 static void kvmppc_clear_debug(struct kvm_vcpu *vcpu)
1051 {
1052         if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
1053                 u64 msr = kvmppc_get_msr(vcpu);
1054
1055                 kvmppc_set_msr(vcpu, msr & ~MSR_SE);
1056         }
1057 }
1058
1059 static int kvmppc_exit_pr_progint(struct kvm_run *run, struct kvm_vcpu *vcpu,
1060                                   unsigned int exit_nr)
1061 {
1062         enum emulation_result er;
1063         ulong flags;
1064         u32 last_inst;
1065         int emul, r;
1066
1067         /*
1068          * shadow_srr1 only contains valid flags if we came here via a program
1069          * exception. The other exceptions (emulation assist, FP unavailable,
1070          * etc.) do not provide flags in SRR1, so use an illegal-instruction
1071          * exception when injecting a program interrupt into the guest.
1072          */
1073         if (exit_nr == BOOK3S_INTERRUPT_PROGRAM)
1074                 flags = vcpu->arch.shadow_srr1 & 0x1f0000ull;
1075         else
1076                 flags = SRR1_PROGILL;
1077
1078         emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1079         if (emul != EMULATE_DONE)
1080                 return RESUME_GUEST;
1081
1082         if (kvmppc_get_msr(vcpu) & MSR_PR) {
1083 #ifdef EXIT_DEBUG
1084                 pr_info("Userspace triggered 0x700 exception at\n 0x%lx (0x%x)\n",
1085                         kvmppc_get_pc(vcpu), last_inst);
1086 #endif
1087                 if ((last_inst & 0xff0007ff) != (INS_DCBZ & 0xfffffff7)) {
1088                         kvmppc_core_queue_program(vcpu, flags);
1089                         return RESUME_GUEST;
1090                 }
1091         }
1092
1093         vcpu->stat.emulated_inst_exits++;
1094         er = kvmppc_emulate_instruction(run, vcpu);
1095         switch (er) {
1096         case EMULATE_DONE:
1097                 r = RESUME_GUEST_NV;
1098                 break;
1099         case EMULATE_AGAIN:
1100                 r = RESUME_GUEST;
1101                 break;
1102         case EMULATE_FAIL:
1103                 pr_crit("%s: emulation at %lx failed (%08x)\n",
1104                         __func__, kvmppc_get_pc(vcpu), last_inst);
1105                 kvmppc_core_queue_program(vcpu, flags);
1106                 r = RESUME_GUEST;
1107                 break;
1108         case EMULATE_DO_MMIO:
1109                 run->exit_reason = KVM_EXIT_MMIO;
1110                 r = RESUME_HOST_NV;
1111                 break;
1112         case EMULATE_EXIT_USER:
1113                 r = RESUME_HOST_NV;
1114                 break;
1115         default:
1116                 BUG();
1117         }
1118
1119         return r;
1120 }
1121
1122 int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
1123                           unsigned int exit_nr)
1124 {
1125         int r = RESUME_HOST;
1126         int s;
1127
1128         vcpu->stat.sum_exits++;
1129
1130         run->exit_reason = KVM_EXIT_UNKNOWN;
1131         run->ready_for_interrupt_injection = 1;
1132
1133         /* We get here with MSR.EE=1 */
1134
1135         trace_kvm_exit(exit_nr, vcpu);
1136         guest_exit();
1137
1138         switch (exit_nr) {
1139         case BOOK3S_INTERRUPT_INST_STORAGE:
1140         {
1141                 ulong shadow_srr1 = vcpu->arch.shadow_srr1;
1142                 vcpu->stat.pf_instruc++;
1143
1144                 if (kvmppc_is_split_real(vcpu))
1145                         kvmppc_fixup_split_real(vcpu);
1146
1147 #ifdef CONFIG_PPC_BOOK3S_32
1148                 /* We set segments as unused segments when invalidating them. So
1149                  * treat the respective fault as segment fault. */
1150                 {
1151                         struct kvmppc_book3s_shadow_vcpu *svcpu;
1152                         u32 sr;
1153
1154                         svcpu = svcpu_get(vcpu);
1155                         sr = svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT];
1156                         svcpu_put(svcpu);
1157                         if (sr == SR_INVALID) {
1158                                 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
1159                                 r = RESUME_GUEST;
1160                                 break;
1161                         }
1162                 }
1163 #endif
1164
1165                 /* only care about PTEG not found errors, but leave NX alone */
1166                 if (shadow_srr1 & 0x40000000) {
1167                         int idx = srcu_read_lock(&vcpu->kvm->srcu);
1168                         r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
1169                         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1170                         vcpu->stat.sp_instruc++;
1171                 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
1172                           (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
1173                         /*
1174                          * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
1175                          *     so we can't use the NX bit inside the guest. Let's cross our fingers,
1176                          *     that no guest that needs the dcbz hack does NX.
1177                          */
1178                         kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
1179                         r = RESUME_GUEST;
1180                 } else {
1181                         kvmppc_core_queue_inst_storage(vcpu,
1182                                                 shadow_srr1 & 0x58000000);
1183                         r = RESUME_GUEST;
1184                 }
1185                 break;
1186         }
1187         case BOOK3S_INTERRUPT_DATA_STORAGE:
1188         {
1189                 ulong dar = kvmppc_get_fault_dar(vcpu);
1190                 u32 fault_dsisr = vcpu->arch.fault_dsisr;
1191                 vcpu->stat.pf_storage++;
1192
1193 #ifdef CONFIG_PPC_BOOK3S_32
1194                 /* We set segments as unused segments when invalidating them. So
1195                  * treat the respective fault as segment fault. */
1196                 {
1197                         struct kvmppc_book3s_shadow_vcpu *svcpu;
1198                         u32 sr;
1199
1200                         svcpu = svcpu_get(vcpu);
1201                         sr = svcpu->sr[dar >> SID_SHIFT];
1202                         svcpu_put(svcpu);
1203                         if (sr == SR_INVALID) {
1204                                 kvmppc_mmu_map_segment(vcpu, dar);
1205                                 r = RESUME_GUEST;
1206                                 break;
1207                         }
1208                 }
1209 #endif
1210
1211                 /*
1212                  * We need to handle missing shadow PTEs, and
1213                  * protection faults due to us mapping a page read-only
1214                  * when the guest thinks it is writable.
1215                  */
1216                 if (fault_dsisr & (DSISR_NOHPTE | DSISR_PROTFAULT)) {
1217                         int idx = srcu_read_lock(&vcpu->kvm->srcu);
1218                         r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
1219                         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1220                 } else {
1221                         kvmppc_core_queue_data_storage(vcpu, dar, fault_dsisr);
1222                         r = RESUME_GUEST;
1223                 }
1224                 break;
1225         }
1226         case BOOK3S_INTERRUPT_DATA_SEGMENT:
1227                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
1228                         kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
1229                         kvmppc_book3s_queue_irqprio(vcpu,
1230                                 BOOK3S_INTERRUPT_DATA_SEGMENT);
1231                 }
1232                 r = RESUME_GUEST;
1233                 break;
1234         case BOOK3S_INTERRUPT_INST_SEGMENT:
1235                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
1236                         kvmppc_book3s_queue_irqprio(vcpu,
1237                                 BOOK3S_INTERRUPT_INST_SEGMENT);
1238                 }
1239                 r = RESUME_GUEST;
1240                 break;
1241         /* We're good on these - the host merely wanted to get our attention */
1242         case BOOK3S_INTERRUPT_DECREMENTER:
1243         case BOOK3S_INTERRUPT_HV_DECREMENTER:
1244         case BOOK3S_INTERRUPT_DOORBELL:
1245         case BOOK3S_INTERRUPT_H_DOORBELL:
1246                 vcpu->stat.dec_exits++;
1247                 r = RESUME_GUEST;
1248                 break;
1249         case BOOK3S_INTERRUPT_EXTERNAL:
1250         case BOOK3S_INTERRUPT_EXTERNAL_HV:
1251         case BOOK3S_INTERRUPT_H_VIRT:
1252                 vcpu->stat.ext_intr_exits++;
1253                 r = RESUME_GUEST;
1254                 break;
1255         case BOOK3S_INTERRUPT_HMI:
1256         case BOOK3S_INTERRUPT_PERFMON:
1257         case BOOK3S_INTERRUPT_SYSTEM_RESET:
1258                 r = RESUME_GUEST;
1259                 break;
1260         case BOOK3S_INTERRUPT_PROGRAM:
1261         case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
1262                 r = kvmppc_exit_pr_progint(run, vcpu, exit_nr);
1263                 break;
1264         case BOOK3S_INTERRUPT_SYSCALL:
1265         {
1266                 u32 last_sc;
1267                 int emul;
1268
1269                 /* Get last sc for papr */
1270                 if (vcpu->arch.papr_enabled) {
1271                         /* The sc instuction points SRR0 to the next inst */
1272                         emul = kvmppc_get_last_inst(vcpu, INST_SC, &last_sc);
1273                         if (emul != EMULATE_DONE) {
1274                                 kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) - 4);
1275                                 r = RESUME_GUEST;
1276                                 break;
1277                         }
1278                 }
1279
1280                 if (vcpu->arch.papr_enabled &&
1281                     (last_sc == 0x44000022) &&
1282                     !(kvmppc_get_msr(vcpu) & MSR_PR)) {
1283                         /* SC 1 papr hypercalls */
1284                         ulong cmd = kvmppc_get_gpr(vcpu, 3);
1285                         int i;
1286
1287 #ifdef CONFIG_PPC_BOOK3S_64
1288                         if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
1289                                 r = RESUME_GUEST;
1290                                 break;
1291                         }
1292 #endif
1293
1294                         run->papr_hcall.nr = cmd;
1295                         for (i = 0; i < 9; ++i) {
1296                                 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
1297                                 run->papr_hcall.args[i] = gpr;
1298                         }
1299                         run->exit_reason = KVM_EXIT_PAPR_HCALL;
1300                         vcpu->arch.hcall_needed = 1;
1301                         r = RESUME_HOST;
1302                 } else if (vcpu->arch.osi_enabled &&
1303                     (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
1304                     (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
1305                         /* MOL hypercalls */
1306                         u64 *gprs = run->osi.gprs;
1307                         int i;
1308
1309                         run->exit_reason = KVM_EXIT_OSI;
1310                         for (i = 0; i < 32; i++)
1311                                 gprs[i] = kvmppc_get_gpr(vcpu, i);
1312                         vcpu->arch.osi_needed = 1;
1313                         r = RESUME_HOST_NV;
1314                 } else if (!(kvmppc_get_msr(vcpu) & MSR_PR) &&
1315                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1316                         /* KVM PV hypercalls */
1317                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1318                         r = RESUME_GUEST;
1319                 } else {
1320                         /* Guest syscalls */
1321                         vcpu->stat.syscall_exits++;
1322                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1323                         r = RESUME_GUEST;
1324                 }
1325                 break;
1326         }
1327         case BOOK3S_INTERRUPT_FP_UNAVAIL:
1328         case BOOK3S_INTERRUPT_ALTIVEC:
1329         case BOOK3S_INTERRUPT_VSX:
1330         {
1331                 int ext_msr = 0;
1332                 int emul;
1333                 u32 last_inst;
1334
1335                 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE) {
1336                         /* Do paired single instruction emulation */
1337                         emul = kvmppc_get_last_inst(vcpu, INST_GENERIC,
1338                                                     &last_inst);
1339                         if (emul == EMULATE_DONE)
1340                                 r = kvmppc_exit_pr_progint(run, vcpu, exit_nr);
1341                         else
1342                                 r = RESUME_GUEST;
1343
1344                         break;
1345                 }
1346
1347                 /* Enable external provider */
1348                 switch (exit_nr) {
1349                 case BOOK3S_INTERRUPT_FP_UNAVAIL:
1350                         ext_msr = MSR_FP;
1351                         break;
1352
1353                 case BOOK3S_INTERRUPT_ALTIVEC:
1354                         ext_msr = MSR_VEC;
1355                         break;
1356
1357                 case BOOK3S_INTERRUPT_VSX:
1358                         ext_msr = MSR_VSX;
1359                         break;
1360                 }
1361
1362                 r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
1363                 break;
1364         }
1365         case BOOK3S_INTERRUPT_ALIGNMENT:
1366         {
1367                 u32 last_inst;
1368                 int emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1369
1370                 if (emul == EMULATE_DONE) {
1371                         u32 dsisr;
1372                         u64 dar;
1373
1374                         dsisr = kvmppc_alignment_dsisr(vcpu, last_inst);
1375                         dar = kvmppc_alignment_dar(vcpu, last_inst);
1376
1377                         kvmppc_set_dsisr(vcpu, dsisr);
1378                         kvmppc_set_dar(vcpu, dar);
1379
1380                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1381                 }
1382                 r = RESUME_GUEST;
1383                 break;
1384         }
1385 #ifdef CONFIG_PPC_BOOK3S_64
1386         case BOOK3S_INTERRUPT_FAC_UNAVAIL:
1387                 r = kvmppc_handle_fac(vcpu, vcpu->arch.shadow_fscr >> 56);
1388                 break;
1389 #endif
1390         case BOOK3S_INTERRUPT_MACHINE_CHECK:
1391                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1392                 r = RESUME_GUEST;
1393                 break;
1394         case BOOK3S_INTERRUPT_TRACE:
1395                 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
1396                         run->exit_reason = KVM_EXIT_DEBUG;
1397                         r = RESUME_HOST;
1398                 } else {
1399                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1400                         r = RESUME_GUEST;
1401                 }
1402                 break;
1403         default:
1404         {
1405                 ulong shadow_srr1 = vcpu->arch.shadow_srr1;
1406                 /* Ugh - bork here! What did we get? */
1407                 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
1408                         exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
1409                 r = RESUME_HOST;
1410                 BUG();
1411                 break;
1412         }
1413         }
1414
1415         if (!(r & RESUME_HOST)) {
1416                 /* To avoid clobbering exit_reason, only check for signals if
1417                  * we aren't already exiting to userspace for some other
1418                  * reason. */
1419
1420                 /*
1421                  * Interrupts could be timers for the guest which we have to
1422                  * inject again, so let's postpone them until we're in the guest
1423                  * and if we really did time things so badly, then we just exit
1424                  * again due to a host external interrupt.
1425                  */
1426                 s = kvmppc_prepare_to_enter(vcpu);
1427                 if (s <= 0)
1428                         r = s;
1429                 else {
1430                         /* interrupts now hard-disabled */
1431                         kvmppc_fix_ee_before_entry();
1432                 }
1433
1434                 kvmppc_handle_lost_ext(vcpu);
1435         }
1436
1437         trace_kvm_book3s_reenter(r, vcpu);
1438
1439         return r;
1440 }
1441
1442 static int kvm_arch_vcpu_ioctl_get_sregs_pr(struct kvm_vcpu *vcpu,
1443                                             struct kvm_sregs *sregs)
1444 {
1445         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1446         int i;
1447
1448         sregs->pvr = vcpu->arch.pvr;
1449
1450         sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
1451         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1452                 for (i = 0; i < 64; i++) {
1453                         sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
1454                         sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
1455                 }
1456         } else {
1457                 for (i = 0; i < 16; i++)
1458                         sregs->u.s.ppc32.sr[i] = kvmppc_get_sr(vcpu, i);
1459
1460                 for (i = 0; i < 8; i++) {
1461                         sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
1462                         sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
1463                 }
1464         }
1465
1466         return 0;
1467 }
1468
1469 static int kvm_arch_vcpu_ioctl_set_sregs_pr(struct kvm_vcpu *vcpu,
1470                                             struct kvm_sregs *sregs)
1471 {
1472         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1473         int i;
1474
1475         kvmppc_set_pvr_pr(vcpu, sregs->pvr);
1476
1477         vcpu3s->sdr1 = sregs->u.s.sdr1;
1478 #ifdef CONFIG_PPC_BOOK3S_64
1479         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1480                 /* Flush all SLB entries */
1481                 vcpu->arch.mmu.slbmte(vcpu, 0, 0);
1482                 vcpu->arch.mmu.slbia(vcpu);
1483
1484                 for (i = 0; i < 64; i++) {
1485                         u64 rb = sregs->u.s.ppc64.slb[i].slbe;
1486                         u64 rs = sregs->u.s.ppc64.slb[i].slbv;
1487
1488                         if (rb & SLB_ESID_V)
1489                                 vcpu->arch.mmu.slbmte(vcpu, rs, rb);
1490                 }
1491         } else
1492 #endif
1493         {
1494                 for (i = 0; i < 16; i++) {
1495                         vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
1496                 }
1497                 for (i = 0; i < 8; i++) {
1498                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
1499                                        (u32)sregs->u.s.ppc32.ibat[i]);
1500                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
1501                                        (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
1502                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
1503                                        (u32)sregs->u.s.ppc32.dbat[i]);
1504                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
1505                                        (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
1506                 }
1507         }
1508
1509         /* Flush the MMU after messing with the segments */
1510         kvmppc_mmu_pte_flush(vcpu, 0, 0);
1511
1512         return 0;
1513 }
1514
1515 static int kvmppc_get_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
1516                                  union kvmppc_one_reg *val)
1517 {
1518         int r = 0;
1519
1520         switch (id) {
1521         case KVM_REG_PPC_DEBUG_INST:
1522                 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1523                 break;
1524         case KVM_REG_PPC_HIOR:
1525                 *val = get_reg_val(id, to_book3s(vcpu)->hior);
1526                 break;
1527         case KVM_REG_PPC_VTB:
1528                 *val = get_reg_val(id, to_book3s(vcpu)->vtb);
1529                 break;
1530         case KVM_REG_PPC_LPCR:
1531         case KVM_REG_PPC_LPCR_64:
1532                 /*
1533                  * We are only interested in the LPCR_ILE bit
1534                  */
1535                 if (vcpu->arch.intr_msr & MSR_LE)
1536                         *val = get_reg_val(id, LPCR_ILE);
1537                 else
1538                         *val = get_reg_val(id, 0);
1539                 break;
1540 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1541         case KVM_REG_PPC_TFHAR:
1542                 *val = get_reg_val(id, vcpu->arch.tfhar);
1543                 break;
1544         case KVM_REG_PPC_TFIAR:
1545                 *val = get_reg_val(id, vcpu->arch.tfiar);
1546                 break;
1547         case KVM_REG_PPC_TEXASR:
1548                 *val = get_reg_val(id, vcpu->arch.texasr);
1549                 break;
1550         case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
1551                 *val = get_reg_val(id,
1552                                 vcpu->arch.gpr_tm[id-KVM_REG_PPC_TM_GPR0]);
1553                 break;
1554         case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
1555         {
1556                 int i, j;
1557
1558                 i = id - KVM_REG_PPC_TM_VSR0;
1559                 if (i < 32)
1560                         for (j = 0; j < TS_FPRWIDTH; j++)
1561                                 val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j];
1562                 else {
1563                         if (cpu_has_feature(CPU_FTR_ALTIVEC))
1564                                 val->vval = vcpu->arch.vr_tm.vr[i-32];
1565                         else
1566                                 r = -ENXIO;
1567                 }
1568                 break;
1569         }
1570         case KVM_REG_PPC_TM_CR:
1571                 *val = get_reg_val(id, vcpu->arch.cr_tm);
1572                 break;
1573         case KVM_REG_PPC_TM_XER:
1574                 *val = get_reg_val(id, vcpu->arch.xer_tm);
1575                 break;
1576         case KVM_REG_PPC_TM_LR:
1577                 *val = get_reg_val(id, vcpu->arch.lr_tm);
1578                 break;
1579         case KVM_REG_PPC_TM_CTR:
1580                 *val = get_reg_val(id, vcpu->arch.ctr_tm);
1581                 break;
1582         case KVM_REG_PPC_TM_FPSCR:
1583                 *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr);
1584                 break;
1585         case KVM_REG_PPC_TM_AMR:
1586                 *val = get_reg_val(id, vcpu->arch.amr_tm);
1587                 break;
1588         case KVM_REG_PPC_TM_PPR:
1589                 *val = get_reg_val(id, vcpu->arch.ppr_tm);
1590                 break;
1591         case KVM_REG_PPC_TM_VRSAVE:
1592                 *val = get_reg_val(id, vcpu->arch.vrsave_tm);
1593                 break;
1594         case KVM_REG_PPC_TM_VSCR:
1595                 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1596                         *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]);
1597                 else
1598                         r = -ENXIO;
1599                 break;
1600         case KVM_REG_PPC_TM_DSCR:
1601                 *val = get_reg_val(id, vcpu->arch.dscr_tm);
1602                 break;
1603         case KVM_REG_PPC_TM_TAR:
1604                 *val = get_reg_val(id, vcpu->arch.tar_tm);
1605                 break;
1606 #endif
1607         default:
1608                 r = -EINVAL;
1609                 break;
1610         }
1611
1612         return r;
1613 }
1614
1615 static void kvmppc_set_lpcr_pr(struct kvm_vcpu *vcpu, u64 new_lpcr)
1616 {
1617         if (new_lpcr & LPCR_ILE)
1618                 vcpu->arch.intr_msr |= MSR_LE;
1619         else
1620                 vcpu->arch.intr_msr &= ~MSR_LE;
1621 }
1622
1623 static int kvmppc_set_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
1624                                  union kvmppc_one_reg *val)
1625 {
1626         int r = 0;
1627
1628         switch (id) {
1629         case KVM_REG_PPC_HIOR:
1630                 to_book3s(vcpu)->hior = set_reg_val(id, *val);
1631                 to_book3s(vcpu)->hior_explicit = true;
1632                 break;
1633         case KVM_REG_PPC_VTB:
1634                 to_book3s(vcpu)->vtb = set_reg_val(id, *val);
1635                 break;
1636         case KVM_REG_PPC_LPCR:
1637         case KVM_REG_PPC_LPCR_64:
1638                 kvmppc_set_lpcr_pr(vcpu, set_reg_val(id, *val));
1639                 break;
1640 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1641         case KVM_REG_PPC_TFHAR:
1642                 vcpu->arch.tfhar = set_reg_val(id, *val);
1643                 break;
1644         case KVM_REG_PPC_TFIAR:
1645                 vcpu->arch.tfiar = set_reg_val(id, *val);
1646                 break;
1647         case KVM_REG_PPC_TEXASR:
1648                 vcpu->arch.texasr = set_reg_val(id, *val);
1649                 break;
1650         case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
1651                 vcpu->arch.gpr_tm[id - KVM_REG_PPC_TM_GPR0] =
1652                         set_reg_val(id, *val);
1653                 break;
1654         case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
1655         {
1656                 int i, j;
1657
1658                 i = id - KVM_REG_PPC_TM_VSR0;
1659                 if (i < 32)
1660                         for (j = 0; j < TS_FPRWIDTH; j++)
1661                                 vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j];
1662                 else
1663                         if (cpu_has_feature(CPU_FTR_ALTIVEC))
1664                                 vcpu->arch.vr_tm.vr[i-32] = val->vval;
1665                         else
1666                                 r = -ENXIO;
1667                 break;
1668         }
1669         case KVM_REG_PPC_TM_CR:
1670                 vcpu->arch.cr_tm = set_reg_val(id, *val);
1671                 break;
1672         case KVM_REG_PPC_TM_XER:
1673                 vcpu->arch.xer_tm = set_reg_val(id, *val);
1674                 break;
1675         case KVM_REG_PPC_TM_LR:
1676                 vcpu->arch.lr_tm = set_reg_val(id, *val);
1677                 break;
1678         case KVM_REG_PPC_TM_CTR:
1679                 vcpu->arch.ctr_tm = set_reg_val(id, *val);
1680                 break;
1681         case KVM_REG_PPC_TM_FPSCR:
1682                 vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val);
1683                 break;
1684         case KVM_REG_PPC_TM_AMR:
1685                 vcpu->arch.amr_tm = set_reg_val(id, *val);
1686                 break;
1687         case KVM_REG_PPC_TM_PPR:
1688                 vcpu->arch.ppr_tm = set_reg_val(id, *val);
1689                 break;
1690         case KVM_REG_PPC_TM_VRSAVE:
1691                 vcpu->arch.vrsave_tm = set_reg_val(id, *val);
1692                 break;
1693         case KVM_REG_PPC_TM_VSCR:
1694                 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1695                         vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val);
1696                 else
1697                         r = -ENXIO;
1698                 break;
1699         case KVM_REG_PPC_TM_DSCR:
1700                 vcpu->arch.dscr_tm = set_reg_val(id, *val);
1701                 break;
1702         case KVM_REG_PPC_TM_TAR:
1703                 vcpu->arch.tar_tm = set_reg_val(id, *val);
1704                 break;
1705 #endif
1706         default:
1707                 r = -EINVAL;
1708                 break;
1709         }
1710
1711         return r;
1712 }
1713
1714 static struct kvm_vcpu *kvmppc_core_vcpu_create_pr(struct kvm *kvm,
1715                                                    unsigned int id)
1716 {
1717         struct kvmppc_vcpu_book3s *vcpu_book3s;
1718         struct kvm_vcpu *vcpu;
1719         int err = -ENOMEM;
1720         unsigned long p;
1721
1722         vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
1723         if (!vcpu)
1724                 goto out;
1725
1726         vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
1727         if (!vcpu_book3s)
1728                 goto free_vcpu;
1729         vcpu->arch.book3s = vcpu_book3s;
1730
1731 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1732         vcpu->arch.shadow_vcpu =
1733                 kzalloc(sizeof(*vcpu->arch.shadow_vcpu), GFP_KERNEL);
1734         if (!vcpu->arch.shadow_vcpu)
1735                 goto free_vcpu3s;
1736 #endif
1737
1738         err = kvm_vcpu_init(vcpu, kvm, id);
1739         if (err)
1740                 goto free_shadow_vcpu;
1741
1742         err = -ENOMEM;
1743         p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
1744         if (!p)
1745                 goto uninit_vcpu;
1746         vcpu->arch.shared = (void *)p;
1747 #ifdef CONFIG_PPC_BOOK3S_64
1748         /* Always start the shared struct in native endian mode */
1749 #ifdef __BIG_ENDIAN__
1750         vcpu->arch.shared_big_endian = true;
1751 #else
1752         vcpu->arch.shared_big_endian = false;
1753 #endif
1754
1755         /*
1756          * Default to the same as the host if we're on sufficiently
1757          * recent machine that we have 1TB segments;
1758          * otherwise default to PPC970FX.
1759          */
1760         vcpu->arch.pvr = 0x3C0301;
1761         if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
1762                 vcpu->arch.pvr = mfspr(SPRN_PVR);
1763         vcpu->arch.intr_msr = MSR_SF;
1764 #else
1765         /* default to book3s_32 (750) */
1766         vcpu->arch.pvr = 0x84202;
1767 #endif
1768         kvmppc_set_pvr_pr(vcpu, vcpu->arch.pvr);
1769         vcpu->arch.slb_nr = 64;
1770
1771         vcpu->arch.shadow_msr = MSR_USER64 & ~MSR_LE;
1772
1773         err = kvmppc_mmu_init(vcpu);
1774         if (err < 0)
1775                 goto uninit_vcpu;
1776
1777         return vcpu;
1778
1779 uninit_vcpu:
1780         kvm_vcpu_uninit(vcpu);
1781 free_shadow_vcpu:
1782 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1783         kfree(vcpu->arch.shadow_vcpu);
1784 free_vcpu3s:
1785 #endif
1786         vfree(vcpu_book3s);
1787 free_vcpu:
1788         kmem_cache_free(kvm_vcpu_cache, vcpu);
1789 out:
1790         return ERR_PTR(err);
1791 }
1792
1793 static void kvmppc_core_vcpu_free_pr(struct kvm_vcpu *vcpu)
1794 {
1795         struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1796
1797         free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
1798         kvm_vcpu_uninit(vcpu);
1799 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1800         kfree(vcpu->arch.shadow_vcpu);
1801 #endif
1802         vfree(vcpu_book3s);
1803         kmem_cache_free(kvm_vcpu_cache, vcpu);
1804 }
1805
1806 static int kvmppc_vcpu_run_pr(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1807 {
1808         int ret;
1809 #ifdef CONFIG_ALTIVEC
1810         unsigned long uninitialized_var(vrsave);
1811 #endif
1812
1813         /* Check if we can run the vcpu at all */
1814         if (!vcpu->arch.sane) {
1815                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1816                 ret = -EINVAL;
1817                 goto out;
1818         }
1819
1820         kvmppc_setup_debug(vcpu);
1821
1822         /*
1823          * Interrupts could be timers for the guest which we have to inject
1824          * again, so let's postpone them until we're in the guest and if we
1825          * really did time things so badly, then we just exit again due to
1826          * a host external interrupt.
1827          */
1828         ret = kvmppc_prepare_to_enter(vcpu);
1829         if (ret <= 0)
1830                 goto out;
1831         /* interrupts now hard-disabled */
1832
1833         /* Save FPU, Altivec and VSX state */
1834         giveup_all(current);
1835
1836         /* Preload FPU if it's enabled */
1837         if (kvmppc_get_msr(vcpu) & MSR_FP)
1838                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1839
1840         kvmppc_fix_ee_before_entry();
1841
1842         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
1843
1844         kvmppc_clear_debug(vcpu);
1845
1846         /* No need for guest_exit. It's done in handle_exit.
1847            We also get here with interrupts enabled. */
1848
1849         /* Make sure we save the guest FPU/Altivec/VSX state */
1850         kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
1851
1852         /* Make sure we save the guest TAR/EBB/DSCR state */
1853         kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
1854
1855 out:
1856         vcpu->mode = OUTSIDE_GUEST_MODE;
1857         return ret;
1858 }
1859
1860 /*
1861  * Get (and clear) the dirty memory log for a memory slot.
1862  */
1863 static int kvm_vm_ioctl_get_dirty_log_pr(struct kvm *kvm,
1864                                          struct kvm_dirty_log *log)
1865 {
1866         struct kvm_memslots *slots;
1867         struct kvm_memory_slot *memslot;
1868         struct kvm_vcpu *vcpu;
1869         ulong ga, ga_end;
1870         int is_dirty = 0;
1871         int r;
1872         unsigned long n;
1873
1874         mutex_lock(&kvm->slots_lock);
1875
1876         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1877         if (r)
1878                 goto out;
1879
1880         /* If nothing is dirty, don't bother messing with page tables. */
1881         if (is_dirty) {
1882                 slots = kvm_memslots(kvm);
1883                 memslot = id_to_memslot(slots, log->slot);
1884
1885                 ga = memslot->base_gfn << PAGE_SHIFT;
1886                 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1887
1888                 kvm_for_each_vcpu(n, vcpu, kvm)
1889                         kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1890
1891                 n = kvm_dirty_bitmap_bytes(memslot);
1892                 memset(memslot->dirty_bitmap, 0, n);
1893         }
1894
1895         r = 0;
1896 out:
1897         mutex_unlock(&kvm->slots_lock);
1898         return r;
1899 }
1900
1901 static void kvmppc_core_flush_memslot_pr(struct kvm *kvm,
1902                                          struct kvm_memory_slot *memslot)
1903 {
1904         return;
1905 }
1906
1907 static int kvmppc_core_prepare_memory_region_pr(struct kvm *kvm,
1908                                         struct kvm_memory_slot *memslot,
1909                                         const struct kvm_userspace_memory_region *mem)
1910 {
1911         return 0;
1912 }
1913
1914 static void kvmppc_core_commit_memory_region_pr(struct kvm *kvm,
1915                                 const struct kvm_userspace_memory_region *mem,
1916                                 const struct kvm_memory_slot *old,
1917                                 const struct kvm_memory_slot *new,
1918                                 enum kvm_mr_change change)
1919 {
1920         return;
1921 }
1922
1923 static void kvmppc_core_free_memslot_pr(struct kvm_memory_slot *free,
1924                                         struct kvm_memory_slot *dont)
1925 {
1926         return;
1927 }
1928
1929 static int kvmppc_core_create_memslot_pr(struct kvm_memory_slot *slot,
1930                                          unsigned long npages)
1931 {
1932         return 0;
1933 }
1934
1935
1936 #ifdef CONFIG_PPC64
1937 static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
1938                                          struct kvm_ppc_smmu_info *info)
1939 {
1940         long int i;
1941         struct kvm_vcpu *vcpu;
1942
1943         info->flags = 0;
1944
1945         /* SLB is always 64 entries */
1946         info->slb_size = 64;
1947
1948         /* Standard 4k base page size segment */
1949         info->sps[0].page_shift = 12;
1950         info->sps[0].slb_enc = 0;
1951         info->sps[0].enc[0].page_shift = 12;
1952         info->sps[0].enc[0].pte_enc = 0;
1953
1954         /*
1955          * 64k large page size.
1956          * We only want to put this in if the CPUs we're emulating
1957          * support it, but unfortunately we don't have a vcpu easily
1958          * to hand here to test.  Just pick the first vcpu, and if
1959          * that doesn't exist yet, report the minimum capability,
1960          * i.e., no 64k pages.
1961          * 1T segment support goes along with 64k pages.
1962          */
1963         i = 1;
1964         vcpu = kvm_get_vcpu(kvm, 0);
1965         if (vcpu && (vcpu->arch.hflags & BOOK3S_HFLAG_MULTI_PGSIZE)) {
1966                 info->flags = KVM_PPC_1T_SEGMENTS;
1967                 info->sps[i].page_shift = 16;
1968                 info->sps[i].slb_enc = SLB_VSID_L | SLB_VSID_LP_01;
1969                 info->sps[i].enc[0].page_shift = 16;
1970                 info->sps[i].enc[0].pte_enc = 1;
1971                 ++i;
1972         }
1973
1974         /* Standard 16M large page size segment */
1975         info->sps[i].page_shift = 24;
1976         info->sps[i].slb_enc = SLB_VSID_L;
1977         info->sps[i].enc[0].page_shift = 24;
1978         info->sps[i].enc[0].pte_enc = 0;
1979
1980         return 0;
1981 }
1982
1983 static int kvm_configure_mmu_pr(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg)
1984 {
1985         if (!cpu_has_feature(CPU_FTR_ARCH_300))
1986                 return -ENODEV;
1987         /* Require flags and process table base and size to all be zero. */
1988         if (cfg->flags || cfg->process_table)
1989                 return -EINVAL;
1990         return 0;
1991 }
1992
1993 #else
1994 static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
1995                                          struct kvm_ppc_smmu_info *info)
1996 {
1997         /* We should not get called */
1998         BUG();
1999 }
2000 #endif /* CONFIG_PPC64 */
2001
2002 static unsigned int kvm_global_user_count = 0;
2003 static DEFINE_SPINLOCK(kvm_global_user_count_lock);
2004
2005 static int kvmppc_core_init_vm_pr(struct kvm *kvm)
2006 {
2007         mutex_init(&kvm->arch.hpt_mutex);
2008
2009 #ifdef CONFIG_PPC_BOOK3S_64
2010         /* Start out with the default set of hcalls enabled */
2011         kvmppc_pr_init_default_hcalls(kvm);
2012 #endif
2013
2014         if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
2015                 spin_lock(&kvm_global_user_count_lock);
2016                 if (++kvm_global_user_count == 1)
2017                         pseries_disable_reloc_on_exc();
2018                 spin_unlock(&kvm_global_user_count_lock);
2019         }
2020         return 0;
2021 }
2022
2023 static void kvmppc_core_destroy_vm_pr(struct kvm *kvm)
2024 {
2025 #ifdef CONFIG_PPC64
2026         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
2027 #endif
2028
2029         if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
2030                 spin_lock(&kvm_global_user_count_lock);
2031                 BUG_ON(kvm_global_user_count == 0);
2032                 if (--kvm_global_user_count == 0)
2033                         pseries_enable_reloc_on_exc();
2034                 spin_unlock(&kvm_global_user_count_lock);
2035         }
2036 }
2037
2038 static int kvmppc_core_check_processor_compat_pr(void)
2039 {
2040         /*
2041          * PR KVM can work on POWER9 inside a guest partition
2042          * running in HPT mode.  It can't work if we are using
2043          * radix translation (because radix provides no way for
2044          * a process to have unique translations in quadrant 3).
2045          */
2046         if (cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled())
2047                 return -EIO;
2048         return 0;
2049 }
2050
2051 static long kvm_arch_vm_ioctl_pr(struct file *filp,
2052                                  unsigned int ioctl, unsigned long arg)
2053 {
2054         return -ENOTTY;
2055 }
2056
2057 static struct kvmppc_ops kvm_ops_pr = {
2058         .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_pr,
2059         .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_pr,
2060         .get_one_reg = kvmppc_get_one_reg_pr,
2061         .set_one_reg = kvmppc_set_one_reg_pr,
2062         .vcpu_load   = kvmppc_core_vcpu_load_pr,
2063         .vcpu_put    = kvmppc_core_vcpu_put_pr,
2064         .set_msr     = kvmppc_set_msr_pr,
2065         .vcpu_run    = kvmppc_vcpu_run_pr,
2066         .vcpu_create = kvmppc_core_vcpu_create_pr,
2067         .vcpu_free   = kvmppc_core_vcpu_free_pr,
2068         .check_requests = kvmppc_core_check_requests_pr,
2069         .get_dirty_log = kvm_vm_ioctl_get_dirty_log_pr,
2070         .flush_memslot = kvmppc_core_flush_memslot_pr,
2071         .prepare_memory_region = kvmppc_core_prepare_memory_region_pr,
2072         .commit_memory_region = kvmppc_core_commit_memory_region_pr,
2073         .unmap_hva_range = kvm_unmap_hva_range_pr,
2074         .age_hva  = kvm_age_hva_pr,
2075         .test_age_hva = kvm_test_age_hva_pr,
2076         .set_spte_hva = kvm_set_spte_hva_pr,
2077         .mmu_destroy  = kvmppc_mmu_destroy_pr,
2078         .free_memslot = kvmppc_core_free_memslot_pr,
2079         .create_memslot = kvmppc_core_create_memslot_pr,
2080         .init_vm = kvmppc_core_init_vm_pr,
2081         .destroy_vm = kvmppc_core_destroy_vm_pr,
2082         .get_smmu_info = kvm_vm_ioctl_get_smmu_info_pr,
2083         .emulate_op = kvmppc_core_emulate_op_pr,
2084         .emulate_mtspr = kvmppc_core_emulate_mtspr_pr,
2085         .emulate_mfspr = kvmppc_core_emulate_mfspr_pr,
2086         .fast_vcpu_kick = kvm_vcpu_kick,
2087         .arch_vm_ioctl  = kvm_arch_vm_ioctl_pr,
2088 #ifdef CONFIG_PPC_BOOK3S_64
2089         .hcall_implemented = kvmppc_hcall_impl_pr,
2090         .configure_mmu = kvm_configure_mmu_pr,
2091 #endif
2092         .giveup_ext = kvmppc_giveup_ext,
2093 };
2094
2095
2096 int kvmppc_book3s_init_pr(void)
2097 {
2098         int r;
2099
2100         r = kvmppc_core_check_processor_compat_pr();
2101         if (r < 0)
2102                 return r;
2103
2104         kvm_ops_pr.owner = THIS_MODULE;
2105         kvmppc_pr_ops = &kvm_ops_pr;
2106
2107         r = kvmppc_mmu_hpte_sysinit();
2108         return r;
2109 }
2110
2111 void kvmppc_book3s_exit_pr(void)
2112 {
2113         kvmppc_pr_ops = NULL;
2114         kvmppc_mmu_hpte_sysexit();
2115 }
2116
2117 /*
2118  * We only support separate modules for book3s 64
2119  */
2120 #ifdef CONFIG_PPC_BOOK3S_64
2121
2122 module_init(kvmppc_book3s_init_pr);
2123 module_exit(kvmppc_book3s_exit_pr);
2124
2125 MODULE_LICENSE("GPL");
2126 MODULE_ALIAS_MISCDEV(KVM_MINOR);
2127 MODULE_ALIAS("devname:kvm");
2128 #endif