Pileus Git - ~andy/linux/blob - 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 <asm/tlbflush.h>
  31 #include <asm/uaccess.h>
  32 #include <asm/io.h>
  33 #include <asm/kvm_ppc.h>
  34 #include <asm/kvm_book3s.h>
  35 #include <asm/mmu_context.h>
  36 #include <asm/switch_to.h>
  37 #include <asm/firmware.h>
  38 #include <asm/hvcall.h>
  39 #include <linux/gfp.h>
  40 #include <linux/sched.h>
  41 #include <linux/vmalloc.h>
  42 #include <linux/highmem.h>
  43 #include <linux/module.h>
  44 #include <linux/miscdevice.h>
  45
  46 #include "book3s.h"
  47
  48 #define CREATE_TRACE_POINTS
  49 #include "trace_pr.h"
  50
  51 /* #define EXIT_DEBUG */
  52 /* #define DEBUG_EXT */
  53
  54 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
  55                              ulong msr);
  56
  57 /* Some compatibility defines */
  58 #ifdef CONFIG_PPC_BOOK3S_32
  59 #define MSR_USER32 MSR_USER
  60 #define MSR_USER64 MSR_USER
  61 #define HW_PAGE_SIZE PAGE_SIZE
  62 #endif
  63
  64 static void kvmppc_core_vcpu_load_pr(struct kvm_vcpu *vcpu, int cpu)
  65 {
  66 #ifdef CONFIG_PPC_BOOK3S_64
  67         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
  68         memcpy(svcpu->slb, to_book3s(vcpu)->slb_shadow, sizeof(svcpu->slb));
  69         svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
  70         svcpu->in_use = 0;
  71         svcpu_put(svcpu);
  72 #endif
  73         vcpu->cpu = smp_processor_id();
  74 #ifdef CONFIG_PPC_BOOK3S_32
  75         current->thread.kvm_shadow_vcpu = vcpu->arch.shadow_vcpu;
  76 #endif
  77 }
  78
  79 static void kvmppc_core_vcpu_put_pr(struct kvm_vcpu *vcpu)
  80 {
  81 #ifdef CONFIG_PPC_BOOK3S_64
  82         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
  83         if (svcpu->in_use) {
  84                 kvmppc_copy_from_svcpu(vcpu, svcpu);
  85         }
  86         memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
  87         to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
  88         svcpu_put(svcpu);
  89 #endif
  90
  91         kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
  92         vcpu->cpu = -1;
  93 }
  94
  95 /* Copy data needed by real-mode code from vcpu to shadow vcpu */
  96 void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu,
  97                           struct kvm_vcpu *vcpu)
  98 {
  99         svcpu->gpr[0] = vcpu->arch.gpr[0];
 100         svcpu->gpr[1] = vcpu->arch.gpr[1];
 101         svcpu->gpr[2] = vcpu->arch.gpr[2];
 102         svcpu->gpr[3] = vcpu->arch.gpr[3];
 103         svcpu->gpr[4] = vcpu->arch.gpr[4];
 104         svcpu->gpr[5] = vcpu->arch.gpr[5];
 105         svcpu->gpr[6] = vcpu->arch.gpr[6];
 106         svcpu->gpr[7] = vcpu->arch.gpr[7];
 107         svcpu->gpr[8] = vcpu->arch.gpr[8];
 108         svcpu->gpr[9] = vcpu->arch.gpr[9];
 109         svcpu->gpr[10] = vcpu->arch.gpr[10];
 110         svcpu->gpr[11] = vcpu->arch.gpr[11];
 111         svcpu->gpr[12] = vcpu->arch.gpr[12];
 112         svcpu->gpr[13] = vcpu->arch.gpr[13];
 113         svcpu->cr  = vcpu->arch.cr;
 114         svcpu->xer = vcpu->arch.xer;
 115         svcpu->ctr = vcpu->arch.ctr;
 116         svcpu->lr  = vcpu->arch.lr;
 117         svcpu->pc  = vcpu->arch.pc;
 118         svcpu->in_use = true;
 119 }
 120
 121 /* Copy data touched by real-mode code from shadow vcpu back to vcpu */
 122 void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
 123                             struct kvmppc_book3s_shadow_vcpu *svcpu)
 124 {
 125         /*
 126          * vcpu_put would just call us again because in_use hasn't
 127          * been updated yet.
 128          */
 129         preempt_disable();
 130
 131         /*
 132          * Maybe we were already preempted and synced the svcpu from
 133          * our preempt notifiers. Don't bother touching this svcpu then.
 134          */
 135         if (!svcpu->in_use)
 136                 goto out;
 137
 138         vcpu->arch.gpr[0] = svcpu->gpr[0];
 139         vcpu->arch.gpr[1] = svcpu->gpr[1];
 140         vcpu->arch.gpr[2] = svcpu->gpr[2];
 141         vcpu->arch.gpr[3] = svcpu->gpr[3];
 142         vcpu->arch.gpr[4] = svcpu->gpr[4];
 143         vcpu->arch.gpr[5] = svcpu->gpr[5];
 144         vcpu->arch.gpr[6] = svcpu->gpr[6];
 145         vcpu->arch.gpr[7] = svcpu->gpr[7];
 146         vcpu->arch.gpr[8] = svcpu->gpr[8];
 147         vcpu->arch.gpr[9] = svcpu->gpr[9];
 148         vcpu->arch.gpr[10] = svcpu->gpr[10];
 149         vcpu->arch.gpr[11] = svcpu->gpr[11];
 150         vcpu->arch.gpr[12] = svcpu->gpr[12];
 151         vcpu->arch.gpr[13] = svcpu->gpr[13];
 152         vcpu->arch.cr  = svcpu->cr;
 153         vcpu->arch.xer = svcpu->xer;
 154         vcpu->arch.ctr = svcpu->ctr;
 155         vcpu->arch.lr  = svcpu->lr;
 156         vcpu->arch.pc  = svcpu->pc;
 157         vcpu->arch.shadow_srr1 = svcpu->shadow_srr1;
 158         vcpu->arch.fault_dar   = svcpu->fault_dar;
 159         vcpu->arch.fault_dsisr = svcpu->fault_dsisr;
 160         vcpu->arch.last_inst   = svcpu->last_inst;
 161         svcpu->in_use = false;
 162
 163 out:
 164         preempt_enable();
 165 }
 166
 167 static int kvmppc_core_check_requests_pr(struct kvm_vcpu *vcpu)
 168 {
 169         int r = 1; /* Indicate we want to get back into the guest */
 170
 171         /* We misuse TLB_FLUSH to indicate that we want to clear
 172            all shadow cache entries */
 173         if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
 174                 kvmppc_mmu_pte_flush(vcpu, 0, 0);
 175
 176         return r;
 177 }
 178
 179 /************* MMU Notifiers *************/
 180 static void do_kvm_unmap_hva(struct kvm *kvm, unsigned long start,
 181                              unsigned long end)
 182 {
 183         long i;
 184         struct kvm_vcpu *vcpu;
 185         struct kvm_memslots *slots;
 186         struct kvm_memory_slot *memslot;
 187
 188         slots = kvm_memslots(kvm);
 189         kvm_for_each_memslot(memslot, slots) {
 190                 unsigned long hva_start, hva_end;
 191                 gfn_t gfn, gfn_end;
 192
 193                 hva_start = max(start, memslot->userspace_addr);
 194                 hva_end = min(end, memslot->userspace_addr +
 195                                         (memslot->npages << PAGE_SHIFT));
 196                 if (hva_start >= hva_end)
 197                         continue;
 198                 /*
 199                  * {gfn(page) | page intersects with [hva_start, hva_end)} =
 200                  * {gfn, gfn+1, ..., gfn_end-1}.
 201                  */
 202                 gfn = hva_to_gfn_memslot(hva_start, memslot);
 203                 gfn_end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, memslot);
 204                 kvm_for_each_vcpu(i, vcpu, kvm)
 205                         kvmppc_mmu_pte_pflush(vcpu, gfn << PAGE_SHIFT,
 206                                               gfn_end << PAGE_SHIFT);
 207         }
 208 }
 209
 210 static int kvm_unmap_hva_pr(struct kvm *kvm, unsigned long hva)
 211 {
 212         trace_kvm_unmap_hva(hva);
 213
 214         do_kvm_unmap_hva(kvm, hva, hva + PAGE_SIZE);
 215
 216         return 0;
 217 }
 218
 219 static int kvm_unmap_hva_range_pr(struct kvm *kvm, unsigned long start,
 220                                   unsigned long end)
 221 {
 222         do_kvm_unmap_hva(kvm, start, end);
 223
 224         return 0;
 225 }
 226
 227 static int kvm_age_hva_pr(struct kvm *kvm, unsigned long hva)
 228 {
 229         /* XXX could be more clever ;) */
 230         return 0;
 231 }
 232
 233 static int kvm_test_age_hva_pr(struct kvm *kvm, unsigned long hva)
 234 {
 235         /* XXX could be more clever ;) */
 236         return 0;
 237 }
 238
 239 static void kvm_set_spte_hva_pr(struct kvm *kvm, unsigned long hva, pte_t pte)
 240 {
 241         /* The page will get remapped properly on its next fault */
 242         do_kvm_unmap_hva(kvm, hva, hva + PAGE_SIZE);
 243 }
 244
 245 /*****************************************/
 246
 247 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
 248 {
 249         ulong smsr = vcpu->arch.shared->msr;
 250
 251         /* Guest MSR values */
 252         smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE;
 253         /* Process MSR values */
 254         smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
 255         /* External providers the guest reserved */
 256         smsr |= (vcpu->arch.shared->msr & vcpu->arch.guest_owned_ext);
 257         /* 64-bit Process MSR values */
 258 #ifdef CONFIG_PPC_BOOK3S_64
 259         smsr |= MSR_ISF | MSR_HV;
 260 #endif
 261         vcpu->arch.shadow_msr = smsr;
 262 }
 263
 264 static void kvmppc_set_msr_pr(struct kvm_vcpu *vcpu, u64 msr)
 265 {
 266         ulong old_msr = vcpu->arch.shared->msr;
 267
 268 #ifdef EXIT_DEBUG
 269         printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
 270 #endif
 271
 272         msr &= to_book3s(vcpu)->msr_mask;
 273         vcpu->arch.shared->msr = msr;
 274         kvmppc_recalc_shadow_msr(vcpu);
 275
 276         if (msr & MSR_POW) {
 277                 if (!vcpu->arch.pending_exceptions) {
 278                         kvm_vcpu_block(vcpu);
 279                         clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 280                         vcpu->stat.halt_wakeup++;
 281
 282                         /* Unset POW bit after we woke up */
 283                         msr &= ~MSR_POW;
 284                         vcpu->arch.shared->msr = msr;
 285                 }
 286         }
 287
 288         if ((vcpu->arch.shared->msr & (MSR_PR|MSR_IR|MSR_DR)) !=
 289                    (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
 290                 kvmppc_mmu_flush_segments(vcpu);
 291                 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
 292
 293                 /* Preload magic page segment when in kernel mode */
 294                 if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
 295                         struct kvm_vcpu_arch *a = &vcpu->arch;
 296
 297                         if (msr & MSR_DR)
 298                                 kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
 299                         else
 300                                 kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
 301                 }
 302         }
 303
 304         /*
 305          * When switching from 32 to 64-bit, we may have a stale 32-bit
 306          * magic page around, we need to flush it. Typically 32-bit magic
 307          * page will be instanciated when calling into RTAS. Note: We
 308          * assume that such transition only happens while in kernel mode,
 309          * ie, we never transition from user 32-bit to kernel 64-bit with
 310          * a 32-bit magic page around.
 311          */
 312         if (vcpu->arch.magic_page_pa &&
 313             !(old_msr & MSR_PR) && !(old_msr & MSR_SF) && (msr & MSR_SF)) {
 314                 /* going from RTAS to normal kernel code */
 315                 kvmppc_mmu_pte_flush(vcpu, (uint32_t)vcpu->arch.magic_page_pa,
 316                                      ~0xFFFUL);
 317         }
 318
 319         /* Preload FPU if it's enabled */
 320         if (vcpu->arch.shared->msr & MSR_FP)
 321                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
 322 }
 323
 324 void kvmppc_set_pvr_pr(struct kvm_vcpu *vcpu, u32 pvr)
 325 {
 326         u32 host_pvr;
 327
 328         vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
 329         vcpu->arch.pvr = pvr;
 330 #ifdef CONFIG_PPC_BOOK3S_64
 331         if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
 332                 kvmppc_mmu_book3s_64_init(vcpu);
 333                 if (!to_book3s(vcpu)->hior_explicit)
 334                         to_book3s(vcpu)->hior = 0xfff00000;
 335                 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
 336                 vcpu->arch.cpu_type = KVM_CPU_3S_64;
 337         } else
 338 #endif
 339         {
 340                 kvmppc_mmu_book3s_32_init(vcpu);
 341                 if (!to_book3s(vcpu)->hior_explicit)
 342                         to_book3s(vcpu)->hior = 0;
 343                 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
 344                 vcpu->arch.cpu_type = KVM_CPU_3S_32;
 345         }
 346
 347         kvmppc_sanity_check(vcpu);
 348
 349         /* If we are in hypervisor level on 970, we can tell the CPU to
 350          * treat DCBZ as 32 bytes store */
 351         vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
 352         if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
 353             !strcmp(cur_cpu_spec->platform, "ppc970"))
 354                 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 355
 356         /* Cell performs badly if MSR_FEx are set. So let's hope nobody
 357            really needs them in a VM on Cell and force disable them. */
 358         if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
 359                 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
 360
 361         /*
 362          * If they're asking for POWER6 or later, set the flag
 363          * indicating that we can do multiple large page sizes
 364          * and 1TB segments.
 365          * Also set the flag that indicates that tlbie has the large
 366          * page bit in the RB operand instead of the instruction.
 367          */
 368         switch (PVR_VER(pvr)) {
 369         case PVR_POWER6:
 370         case PVR_POWER7:
 371         case PVR_POWER7p:
 372         case PVR_POWER8:
 373                 vcpu->arch.hflags |= BOOK3S_HFLAG_MULTI_PGSIZE |
 374                         BOOK3S_HFLAG_NEW_TLBIE;
 375                 break;
 376         }
 377
 378 #ifdef CONFIG_PPC_BOOK3S_32
 379         /* 32 bit Book3S always has 32 byte dcbz */
 380         vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 381 #endif
 382
 383         /* On some CPUs we can execute paired single operations natively */
 384         asm ( "mfpvr %0" : "=r"(host_pvr));
 385         switch (host_pvr) {
 386         case 0x00080200:        /* lonestar 2.0 */
 387         case 0x00088202:        /* lonestar 2.2 */
 388         case 0x70000100:        /* gekko 1.0 */
 389         case 0x00080100:        /* gekko 2.0 */
 390         case 0x00083203:        /* gekko 2.3a */
 391         case 0x00083213:        /* gekko 2.3b */
 392         case 0x00083204:        /* gekko 2.4 */
 393         case 0x00083214:        /* gekko 2.4e (8SE) - retail HW2 */
 394         case 0x00087200:        /* broadway */
 395                 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
 396                 /* Enable HID2.PSE - in case we need it later */
 397                 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
 398         }
 399 }
 400
 401 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
 402  * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
 403  * emulate 32 bytes dcbz length.
 404  *
 405  * The Book3s_64 inventors also realized this case and implemented a special bit
 406  * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
 407  *
 408  * My approach here is to patch the dcbz instruction on executing pages.
 409  */
 410 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
 411 {
 412         struct page *hpage;
 413         u64 hpage_offset;
 414         u32 *page;
 415         int i;
 416
 417         hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 418         if (is_error_page(hpage))
 419                 return;
 420
 421         hpage_offset = pte->raddr & ~PAGE_MASK;
 422         hpage_offset &= ~0xFFFULL;
 423         hpage_offset /= 4;
 424
 425         get_page(hpage);
 426         page = kmap_atomic(hpage);
 427
 428         /* patch dcbz into reserved instruction, so we trap */
 429         for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
 430                 if ((page[i] & 0xff0007ff) == INS_DCBZ)
 431                         page[i] &= 0xfffffff7;
 432
 433         kunmap_atomic(page);
 434         put_page(hpage);
 435 }
 436
 437 static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
 438 {
 439         ulong mp_pa = vcpu->arch.magic_page_pa;
 440
 441         if (!(vcpu->arch.shared->msr & MSR_SF))
 442                 mp_pa = (uint32_t)mp_pa;
 443
 444         if (unlikely(mp_pa) &&
 445             unlikely((mp_pa & KVM_PAM) >> PAGE_SHIFT == gfn)) {
 446                 return 1;
 447         }
 448
 449         return kvm_is_visible_gfn(vcpu->kvm, gfn);
 450 }
 451
 452 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
 453                             ulong eaddr, int vec)
 454 {
 455         bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
 456         bool iswrite = false;
 457         int r = RESUME_GUEST;
 458         int relocated;
 459         int page_found = 0;
 460         struct kvmppc_pte pte;
 461         bool is_mmio = false;
 462         bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
 463         bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
 464         u64 vsid;
 465
 466         relocated = data ? dr : ir;
 467         if (data && (vcpu->arch.fault_dsisr & DSISR_ISSTORE))
 468                 iswrite = true;
 469
 470         /* Resolve real address if translation turned on */
 471         if (relocated) {
 472                 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data, iswrite);
 473         } else {
 474                 pte.may_execute = true;
 475                 pte.may_read = true;
 476                 pte.may_write = true;
 477                 pte.raddr = eaddr & KVM_PAM;
 478                 pte.eaddr = eaddr;
 479                 pte.vpage = eaddr >> 12;
 480                 pte.page_size = MMU_PAGE_64K;
 481         }
 482
 483         switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
 484         case 0:
 485                 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
 486                 break;
 487         case MSR_DR:
 488         case MSR_IR:
 489                 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
 490
 491                 if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
 492                         pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
 493                 else
 494                         pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
 495                 pte.vpage |= vsid;
 496
 497                 if (vsid == -1)
 498                         page_found = -EINVAL;
 499                 break;
 500         }
 501
 502         if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 503            (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
 504                 /*
 505                  * If we do the dcbz hack, we have to NX on every execution,
 506                  * so we can patch the executing code. This renders our guest
 507                  * NX-less.
 508                  */
 509                 pte.may_execute = !data;
 510         }
 511
 512         if (page_found == -ENOENT) {
 513                 /* Page not found in guest PTE entries */
 514                 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 515                 vcpu->arch.shared->dsisr = vcpu->arch.fault_dsisr;
 516                 vcpu->arch.shared->msr |=
 517                         vcpu->arch.shadow_srr1 & 0x00000000f8000000ULL;
 518                 kvmppc_book3s_queue_irqprio(vcpu, vec);
 519         } else if (page_found == -EPERM) {
 520                 /* Storage protection */
 521                 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 522                 vcpu->arch.shared->dsisr = vcpu->arch.fault_dsisr & ~DSISR_NOHPTE;
 523                 vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
 524                 vcpu->arch.shared->msr |=
 525                         vcpu->arch.shadow_srr1 & 0x00000000f8000000ULL;
 526                 kvmppc_book3s_queue_irqprio(vcpu, vec);
 527         } else if (page_found == -EINVAL) {
 528                 /* Page not found in guest SLB */
 529                 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 530                 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
 531         } else if (!is_mmio &&
 532                    kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
 533                 if (data && !(vcpu->arch.fault_dsisr & DSISR_NOHPTE)) {
 534                         /*
 535                          * There is already a host HPTE there, presumably
 536                          * a read-only one for a page the guest thinks
 537                          * is writable, so get rid of it first.
 538                          */
 539                         kvmppc_mmu_unmap_page(vcpu, &pte);
 540                 }
 541                 /* The guest's PTE is not mapped yet. Map on the host */
 542                 kvmppc_mmu_map_page(vcpu, &pte, iswrite);
 543                 if (data)
 544                         vcpu->stat.sp_storage++;
 545                 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 546                          (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
 547                         kvmppc_patch_dcbz(vcpu, &pte);
 548         } else {
 549                 /* MMIO */
 550                 vcpu->stat.mmio_exits++;
 551                 vcpu->arch.paddr_accessed = pte.raddr;
 552                 vcpu->arch.vaddr_accessed = pte.eaddr;
 553                 r = kvmppc_emulate_mmio(run, vcpu);
 554                 if ( r == RESUME_HOST_NV )
 555                         r = RESUME_HOST;
 556         }
 557
 558         return r;
 559 }
 560
 561 static inline int get_fpr_index(int i)
 562 {
 563         return i * TS_FPRWIDTH;
 564 }
 565
 566 /* Give up external provider (FPU, Altivec, VSX) */
 567 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
 568 {
 569         struct thread_struct *t = &current->thread;
 570
 571         /*
 572          * VSX instructions can access FP and vector registers, so if
 573          * we are giving up VSX, make sure we give up FP and VMX as well.
 574          */
 575         if (msr & MSR_VSX)
 576                 msr |= MSR_FP | MSR_VEC;
 577
 578         msr &= vcpu->arch.guest_owned_ext;
 579         if (!msr)
 580                 return;
 581
 582 #ifdef DEBUG_EXT
 583         printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
 584 #endif
 585
 586         if (msr & MSR_FP) {
 587                 /*
 588                  * Note that on CPUs with VSX, giveup_fpu stores
 589                  * both the traditional FP registers and the added VSX
 590                  * registers into thread.fp_state.fpr[].
 591                  */
 592                 if (t->regs->msr & MSR_FP)
 593                         giveup_fpu(current);
 594                 t->fp_save_area = NULL;
 595         }
 596
 597 #ifdef CONFIG_ALTIVEC
 598         if (msr & MSR_VEC) {
 599                 if (current->thread.regs->msr & MSR_VEC)
 600                         giveup_altivec(current);
 601                 t->vr_save_area = NULL;
 602         }
 603 #endif
 604
 605         vcpu->arch.guest_owned_ext &= ~(msr | MSR_VSX);
 606         kvmppc_recalc_shadow_msr(vcpu);
 607 }
 608
 609 static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
 610 {
 611         ulong srr0 = kvmppc_get_pc(vcpu);
 612         u32 last_inst = kvmppc_get_last_inst(vcpu);
 613         int ret;
 614
 615         ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
 616         if (ret == -ENOENT) {
 617                 ulong msr = vcpu->arch.shared->msr;
 618
 619                 msr = kvmppc_set_field(msr, 33, 33, 1);
 620                 msr = kvmppc_set_field(msr, 34, 36, 0);
 621                 vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
 622                 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
 623                 return EMULATE_AGAIN;
 624         }
 625
 626         return EMULATE_DONE;
 627 }
 628
 629 static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
 630 {
 631
 632         /* Need to do paired single emulation? */
 633         if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
 634                 return EMULATE_DONE;
 635
 636         /* Read out the instruction */
 637         if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
 638                 /* Need to emulate */
 639                 return EMULATE_FAIL;
 640
 641         return EMULATE_AGAIN;
 642 }
 643
 644 /* Handle external providers (FPU, Altivec, VSX) */
 645 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
 646                              ulong msr)
 647 {
 648         struct thread_struct *t = &current->thread;
 649
 650         /* When we have paired singles, we emulate in software */
 651         if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
 652                 return RESUME_GUEST;
 653
 654         if (!(vcpu->arch.shared->msr & msr)) {
 655                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 656                 return RESUME_GUEST;
 657         }
 658
 659         if (msr == MSR_VSX) {
 660                 /* No VSX?  Give an illegal instruction interrupt */
 661 #ifdef CONFIG_VSX
 662                 if (!cpu_has_feature(CPU_FTR_VSX))
 663 #endif
 664                 {
 665                         kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
 666                         return RESUME_GUEST;
 667                 }
 668
 669                 /*
 670                  * We have to load up all the FP and VMX registers before
 671                  * we can let the guest use VSX instructions.
 672                  */
 673                 msr = MSR_FP | MSR_VEC | MSR_VSX;
 674         }
 675
 676         /* See if we already own all the ext(s) needed */
 677         msr &= ~vcpu->arch.guest_owned_ext;
 678         if (!msr)
 679                 return RESUME_GUEST;
 680
 681 #ifdef DEBUG_EXT
 682         printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
 683 #endif
 684
 685         if (msr & MSR_FP) {
 686                 enable_kernel_fp();
 687                 load_fp_state(&vcpu->arch.fp);
 688                 t->fp_save_area = &vcpu->arch.fp;
 689         }
 690
 691         if (msr & MSR_VEC) {
 692 #ifdef CONFIG_ALTIVEC
 693                 enable_kernel_altivec();
 694                 load_vr_state(&vcpu->arch.vr);
 695                 t->vr_save_area = &vcpu->arch.vr;
 696 #endif
 697         }
 698
 699         t->regs->msr |= msr;
 700         vcpu->arch.guest_owned_ext |= msr;
 701         kvmppc_recalc_shadow_msr(vcpu);
 702
 703         return RESUME_GUEST;
 704 }
 705
 706 /*
 707  * Kernel code using FP or VMX could have flushed guest state to
 708  * the thread_struct; if so, get it back now.
 709  */
 710 static void kvmppc_handle_lost_ext(struct kvm_vcpu *vcpu)
 711 {
 712         unsigned long lost_ext;
 713
 714         lost_ext = vcpu->arch.guest_owned_ext & ~current->thread.regs->msr;
 715         if (!lost_ext)
 716                 return;
 717
 718         if (lost_ext & MSR_FP) {
 719                 enable_kernel_fp();
 720                 load_fp_state(&vcpu->arch.fp);
 721         }
 722 #ifdef CONFIG_ALTIVEC
 723         if (lost_ext & MSR_VEC) {
 724                 enable_kernel_altivec();
 725                 load_vr_state(&vcpu->arch.vr);
 726         }
 727 #endif
 728         current->thread.regs->msr |= lost_ext;
 729 }
 730
 731 int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
 732                           unsigned int exit_nr)
 733 {
 734         int r = RESUME_HOST;
 735         int s;
 736
 737         vcpu->stat.sum_exits++;
 738
 739         run->exit_reason = KVM_EXIT_UNKNOWN;
 740         run->ready_for_interrupt_injection = 1;
 741
 742         /* We get here with MSR.EE=1 */
 743
 744         trace_kvm_exit(exit_nr, vcpu);
 745         kvm_guest_exit();
 746
 747         switch (exit_nr) {
 748         case BOOK3S_INTERRUPT_INST_STORAGE:
 749         {
 750                 ulong shadow_srr1 = vcpu->arch.shadow_srr1;
 751                 vcpu->stat.pf_instruc++;
 752
 753 #ifdef CONFIG_PPC_BOOK3S_32
 754                 /* We set segments as unused segments when invalidating them. So
 755                  * treat the respective fault as segment fault. */
 756                 {
 757                         struct kvmppc_book3s_shadow_vcpu *svcpu;
 758                         u32 sr;
 759
 760                         svcpu = svcpu_get(vcpu);
 761                         sr = svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT];
 762                         svcpu_put(svcpu);
 763                         if (sr == SR_INVALID) {
 764                                 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
 765                                 r = RESUME_GUEST;
 766                                 break;
 767                         }
 768                 }
 769 #endif
 770
 771                 /* only care about PTEG not found errors, but leave NX alone */
 772                 if (shadow_srr1 & 0x40000000) {
 773                         int idx = srcu_read_lock(&vcpu->kvm->srcu);
 774                         r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
 775                         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 776                         vcpu->stat.sp_instruc++;
 777                 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 778                           (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
 779                         /*
 780                          * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
 781                          *     so we can't use the NX bit inside the guest. Let's cross our fingers,
 782                          *     that no guest that needs the dcbz hack does NX.
 783                          */
 784                         kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
 785                         r = RESUME_GUEST;
 786                 } else {
 787                         vcpu->arch.shared->msr |= shadow_srr1 & 0x58000000;
 788                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 789                         r = RESUME_GUEST;
 790                 }
 791                 break;
 792         }
 793         case BOOK3S_INTERRUPT_DATA_STORAGE:
 794         {
 795                 ulong dar = kvmppc_get_fault_dar(vcpu);
 796                 u32 fault_dsisr = vcpu->arch.fault_dsisr;
 797                 vcpu->stat.pf_storage++;
 798
 799 #ifdef CONFIG_PPC_BOOK3S_32
 800                 /* We set segments as unused segments when invalidating them. So
 801                  * treat the respective fault as segment fault. */
 802                 {
 803                         struct kvmppc_book3s_shadow_vcpu *svcpu;
 804                         u32 sr;
 805
 806                         svcpu = svcpu_get(vcpu);
 807                         sr = svcpu->sr[dar >> SID_SHIFT];
 808                         svcpu_put(svcpu);
 809                         if (sr == SR_INVALID) {
 810                                 kvmppc_mmu_map_segment(vcpu, dar);
 811                                 r = RESUME_GUEST;
 812                                 break;
 813                         }
 814                 }
 815 #endif
 816
 817                 /*
 818                  * We need to handle missing shadow PTEs, and
 819                  * protection faults due to us mapping a page read-only
 820                  * when the guest thinks it is writable.
 821                  */
 822                 if (fault_dsisr & (DSISR_NOHPTE | DSISR_PROTFAULT)) {
 823                         int idx = srcu_read_lock(&vcpu->kvm->srcu);
 824                         r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
 825                         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 826                 } else {
 827                         vcpu->arch.shared->dar = dar;
 828                         vcpu->arch.shared->dsisr = fault_dsisr;
 829                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 830                         r = RESUME_GUEST;
 831                 }
 832                 break;
 833         }
 834         case BOOK3S_INTERRUPT_DATA_SEGMENT:
 835                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
 836                         vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 837                         kvmppc_book3s_queue_irqprio(vcpu,
 838                                 BOOK3S_INTERRUPT_DATA_SEGMENT);
 839                 }
 840                 r = RESUME_GUEST;
 841                 break;
 842         case BOOK3S_INTERRUPT_INST_SEGMENT:
 843                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
 844                         kvmppc_book3s_queue_irqprio(vcpu,
 845                                 BOOK3S_INTERRUPT_INST_SEGMENT);
 846                 }
 847                 r = RESUME_GUEST;
 848                 break;
 849         /* We're good on these - the host merely wanted to get our attention */
 850         case BOOK3S_INTERRUPT_DECREMENTER:
 851         case BOOK3S_INTERRUPT_HV_DECREMENTER:
 852         case BOOK3S_INTERRUPT_DOORBELL:
 853                 vcpu->stat.dec_exits++;
 854                 r = RESUME_GUEST;
 855                 break;
 856         case BOOK3S_INTERRUPT_EXTERNAL:
 857         case BOOK3S_INTERRUPT_EXTERNAL_LEVEL:
 858         case BOOK3S_INTERRUPT_EXTERNAL_HV:
 859                 vcpu->stat.ext_intr_exits++;
 860                 r = RESUME_GUEST;
 861                 break;
 862         case BOOK3S_INTERRUPT_PERFMON:
 863                 r = RESUME_GUEST;
 864                 break;
 865         case BOOK3S_INTERRUPT_PROGRAM:
 866         case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
 867         {
 868                 enum emulation_result er;
 869                 ulong flags;
 870
 871 program_interrupt:
 872                 flags = vcpu->arch.shadow_srr1 & 0x1f0000ull;
 873
 874                 if (vcpu->arch.shared->msr & MSR_PR) {
 875 #ifdef EXIT_DEBUG
 876                         printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
 877 #endif
 878                         if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
 879                             (INS_DCBZ & 0xfffffff7)) {
 880                                 kvmppc_core_queue_program(vcpu, flags);
 881                                 r = RESUME_GUEST;
 882                                 break;
 883                         }
 884                 }
 885
 886                 vcpu->stat.emulated_inst_exits++;
 887                 er = kvmppc_emulate_instruction(run, vcpu);
 888                 switch (er) {
 889                 case EMULATE_DONE:
 890                         r = RESUME_GUEST_NV;
 891                         break;
 892                 case EMULATE_AGAIN:
 893                         r = RESUME_GUEST;
 894                         break;
 895                 case EMULATE_FAIL:
 896                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 897                                __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
 898                         kvmppc_core_queue_program(vcpu, flags);
 899                         r = RESUME_GUEST;
 900                         break;
 901                 case EMULATE_DO_MMIO:
 902                         run->exit_reason = KVM_EXIT_MMIO;
 903                         r = RESUME_HOST_NV;
 904                         break;
 905                 case EMULATE_EXIT_USER:
 906                         r = RESUME_HOST_NV;
 907                         break;
 908                 default:
 909                         BUG();
 910                 }
 911                 break;
 912         }
 913         case BOOK3S_INTERRUPT_SYSCALL:
 914                 if (vcpu->arch.papr_enabled &&
 915                     (kvmppc_get_last_sc(vcpu) == 0x44000022) &&
 916                     !(vcpu->arch.shared->msr & MSR_PR)) {
 917                         /* SC 1 papr hypercalls */
 918                         ulong cmd = kvmppc_get_gpr(vcpu, 3);
 919                         int i;
 920
 921 #ifdef CONFIG_PPC_BOOK3S_64
 922                         if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
 923                                 r = RESUME_GUEST;
 924                                 break;
 925                         }
 926 #endif
 927
 928                         run->papr_hcall.nr = cmd;
 929                         for (i = 0; i < 9; ++i) {
 930                                 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
 931                                 run->papr_hcall.args[i] = gpr;
 932                         }
 933                         run->exit_reason = KVM_EXIT_PAPR_HCALL;
 934                         vcpu->arch.hcall_needed = 1;
 935                         r = RESUME_HOST;
 936                 } else if (vcpu->arch.osi_enabled &&
 937                     (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
 938                     (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
 939                         /* MOL hypercalls */
 940                         u64 *gprs = run->osi.gprs;
 941                         int i;
 942
 943                         run->exit_reason = KVM_EXIT_OSI;
 944                         for (i = 0; i < 32; i++)
 945                                 gprs[i] = kvmppc_get_gpr(vcpu, i);
 946                         vcpu->arch.osi_needed = 1;
 947                         r = RESUME_HOST_NV;
 948                 } else if (!(vcpu->arch.shared->msr & MSR_PR) &&
 949                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
 950                         /* KVM PV hypercalls */
 951                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 952                         r = RESUME_GUEST;
 953                 } else {
 954                         /* Guest syscalls */
 955                         vcpu->stat.syscall_exits++;
 956                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 957                         r = RESUME_GUEST;
 958                 }
 959                 break;
 960         case BOOK3S_INTERRUPT_FP_UNAVAIL:
 961         case BOOK3S_INTERRUPT_ALTIVEC:
 962         case BOOK3S_INTERRUPT_VSX:
 963         {
 964                 int ext_msr = 0;
 965
 966                 switch (exit_nr) {
 967                 case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP;  break;
 968                 case BOOK3S_INTERRUPT_ALTIVEC:    ext_msr = MSR_VEC; break;
 969                 case BOOK3S_INTERRUPT_VSX:        ext_msr = MSR_VSX; break;
 970                 }
 971
 972                 switch (kvmppc_check_ext(vcpu, exit_nr)) {
 973                 case EMULATE_DONE:
 974                         /* everything ok - let's enable the ext */
 975                         r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
 976                         break;
 977                 case EMULATE_FAIL:
 978                         /* we need to emulate this instruction */
 979                         goto program_interrupt;
 980                         break;
 981                 default:
 982                         /* nothing to worry about - go again */
 983                         break;
 984                 }
 985                 break;
 986         }
 987         case BOOK3S_INTERRUPT_ALIGNMENT:
 988                 if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
 989                         vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
 990                                 kvmppc_get_last_inst(vcpu));
 991                         vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
 992                                 kvmppc_get_last_inst(vcpu));
 993                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 994                 }
 995                 r = RESUME_GUEST;
 996                 break;
 997         case BOOK3S_INTERRUPT_MACHINE_CHECK:
 998         case BOOK3S_INTERRUPT_TRACE:
 999                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1000                 r = RESUME_GUEST;
1001                 break;
1002         default:
1003         {
1004                 ulong shadow_srr1 = vcpu->arch.shadow_srr1;
1005                 /* Ugh - bork here! What did we get? */
1006                 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
1007                         exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
1008                 r = RESUME_HOST;
1009                 BUG();
1010                 break;
1011         }
1012         }
1013
1014         if (!(r & RESUME_HOST)) {
1015                 /* To avoid clobbering exit_reason, only check for signals if
1016                  * we aren't already exiting to userspace for some other
1017                  * reason. */
1018
1019                 /*
1020                  * Interrupts could be timers for the guest which we have to
1021                  * inject again, so let's postpone them until we're in the guest
1022                  * and if we really did time things so badly, then we just exit
1023                  * again due to a host external interrupt.
1024                  */
1025                 s = kvmppc_prepare_to_enter(vcpu);
1026                 if (s <= 0)
1027                         r = s;
1028                 else {
1029                         /* interrupts now hard-disabled */
1030                         kvmppc_fix_ee_before_entry();
1031                 }
1032
1033                 kvmppc_handle_lost_ext(vcpu);
1034         }
1035
1036         trace_kvm_book3s_reenter(r, vcpu);
1037
1038         return r;
1039 }
1040
1041 static int kvm_arch_vcpu_ioctl_get_sregs_pr(struct kvm_vcpu *vcpu,
1042                                             struct kvm_sregs *sregs)
1043 {
1044         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1045         int i;
1046
1047         sregs->pvr = vcpu->arch.pvr;
1048
1049         sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
1050         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1051                 for (i = 0; i < 64; i++) {
1052                         sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
1053                         sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
1054                 }
1055         } else {
1056                 for (i = 0; i < 16; i++)
1057                         sregs->u.s.ppc32.sr[i] = vcpu->arch.shared->sr[i];
1058
1059                 for (i = 0; i < 8; i++) {
1060                         sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
1061                         sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
1062                 }
1063         }
1064
1065         return 0;
1066 }
1067
1068 static int kvm_arch_vcpu_ioctl_set_sregs_pr(struct kvm_vcpu *vcpu,
1069                                             struct kvm_sregs *sregs)
1070 {
1071         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1072         int i;
1073
1074         kvmppc_set_pvr_pr(vcpu, sregs->pvr);
1075
1076         vcpu3s->sdr1 = sregs->u.s.sdr1;
1077         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1078                 for (i = 0; i < 64; i++) {
1079                         vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
1080                                                     sregs->u.s.ppc64.slb[i].slbe);
1081                 }
1082         } else {
1083                 for (i = 0; i < 16; i++) {
1084                         vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
1085                 }
1086                 for (i = 0; i < 8; i++) {
1087                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
1088                                        (u32)sregs->u.s.ppc32.ibat[i]);
1089                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
1090                                        (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
1091                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
1092                                        (u32)sregs->u.s.ppc32.dbat[i]);
1093                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
1094                                        (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
1095                 }
1096         }
1097
1098         /* Flush the MMU after messing with the segments */
1099         kvmppc_mmu_pte_flush(vcpu, 0, 0);
1100
1101         return 0;
1102 }
1103
1104 static int kvmppc_get_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
1105                                  union kvmppc_one_reg *val)
1106 {
1107         int r = 0;
1108
1109         switch (id) {
1110         case KVM_REG_PPC_HIOR:
1111                 *val = get_reg_val(id, to_book3s(vcpu)->hior);
1112                 break;
1113         default:
1114                 r = -EINVAL;
1115                 break;
1116         }
1117
1118         return r;
1119 }
1120
1121 static int kvmppc_set_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
1122                                  union kvmppc_one_reg *val)
1123 {
1124         int r = 0;
1125
1126         switch (id) {
1127         case KVM_REG_PPC_HIOR:
1128                 to_book3s(vcpu)->hior = set_reg_val(id, *val);
1129                 to_book3s(vcpu)->hior_explicit = true;
1130                 break;
1131         default:
1132                 r = -EINVAL;
1133                 break;
1134         }
1135
1136         return r;
1137 }
1138
1139 static struct kvm_vcpu *kvmppc_core_vcpu_create_pr(struct kvm *kvm,
1140                                                    unsigned int id)
1141 {
1142         struct kvmppc_vcpu_book3s *vcpu_book3s;
1143         struct kvm_vcpu *vcpu;
1144         int err = -ENOMEM;
1145         unsigned long p;
1146
1147         vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
1148         if (!vcpu)
1149                 goto out;
1150
1151         vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
1152         if (!vcpu_book3s)
1153                 goto free_vcpu;
1154         vcpu->arch.book3s = vcpu_book3s;
1155
1156 #ifdef CONFIG_KVM_BOOK3S_32
1157         vcpu->arch.shadow_vcpu =
1158                 kzalloc(sizeof(*vcpu->arch.shadow_vcpu), GFP_KERNEL);
1159         if (!vcpu->arch.shadow_vcpu)
1160                 goto free_vcpu3s;
1161 #endif
1162
1163         err = kvm_vcpu_init(vcpu, kvm, id);
1164         if (err)
1165                 goto free_shadow_vcpu;
1166
1167         err = -ENOMEM;
1168         p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
1169         if (!p)
1170                 goto uninit_vcpu;
1171         /* the real shared page fills the last 4k of our page */
1172         vcpu->arch.shared = (void *)(p + PAGE_SIZE - 4096);
1173
1174 #ifdef CONFIG_PPC_BOOK3S_64
1175         /*
1176          * Default to the same as the host if we're on sufficiently
1177          * recent machine that we have 1TB segments;
1178          * otherwise default to PPC970FX.
1179          */
1180         vcpu->arch.pvr = 0x3C0301;
1181         if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
1182                 vcpu->arch.pvr = mfspr(SPRN_PVR);
1183 #else
1184         /* default to book3s_32 (750) */
1185         vcpu->arch.pvr = 0x84202;
1186 #endif
1187         kvmppc_set_pvr_pr(vcpu, vcpu->arch.pvr);
1188         vcpu->arch.slb_nr = 64;
1189
1190         vcpu->arch.shadow_msr = MSR_USER64;
1191
1192         err = kvmppc_mmu_init(vcpu);
1193         if (err < 0)
1194                 goto uninit_vcpu;
1195
1196         return vcpu;
1197
1198 uninit_vcpu:
1199         kvm_vcpu_uninit(vcpu);
1200 free_shadow_vcpu:
1201 #ifdef CONFIG_KVM_BOOK3S_32
1202         kfree(vcpu->arch.shadow_vcpu);
1203 free_vcpu3s:
1204 #endif
1205         vfree(vcpu_book3s);
1206 free_vcpu:
1207         kmem_cache_free(kvm_vcpu_cache, vcpu);
1208 out:
1209         return ERR_PTR(err);
1210 }
1211
1212 static void kvmppc_core_vcpu_free_pr(struct kvm_vcpu *vcpu)
1213 {
1214         struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1215
1216         free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
1217         kvm_vcpu_uninit(vcpu);
1218 #ifdef CONFIG_KVM_BOOK3S_32
1219         kfree(vcpu->arch.shadow_vcpu);
1220 #endif
1221         vfree(vcpu_book3s);
1222         kmem_cache_free(kvm_vcpu_cache, vcpu);
1223 }
1224
1225 static int kvmppc_vcpu_run_pr(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1226 {
1227         int ret;
1228 #ifdef CONFIG_ALTIVEC
1229         unsigned long uninitialized_var(vrsave);
1230 #endif
1231
1232         /* Check if we can run the vcpu at all */
1233         if (!vcpu->arch.sane) {
1234                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1235                 ret = -EINVAL;
1236                 goto out;
1237         }
1238
1239         /*
1240          * Interrupts could be timers for the guest which we have to inject
1241          * again, so let's postpone them until we're in the guest and if we
1242          * really did time things so badly, then we just exit again due to
1243          * a host external interrupt.
1244          */
1245         ret = kvmppc_prepare_to_enter(vcpu);
1246         if (ret <= 0)
1247                 goto out;
1248         /* interrupts now hard-disabled */
1249
1250         /* Save FPU state in thread_struct */
1251         if (current->thread.regs->msr & MSR_FP)
1252                 giveup_fpu(current);
1253
1254 #ifdef CONFIG_ALTIVEC
1255         /* Save Altivec state in thread_struct */
1256         if (current->thread.regs->msr & MSR_VEC)
1257                 giveup_altivec(current);
1258 #endif
1259
1260 #ifdef CONFIG_VSX
1261         /* Save VSX state in thread_struct */
1262         if (current->thread.regs->msr & MSR_VSX)
1263                 __giveup_vsx(current);
1264 #endif
1265
1266         /* Preload FPU if it's enabled */
1267         if (vcpu->arch.shared->msr & MSR_FP)
1268                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1269
1270         kvmppc_fix_ee_before_entry();
1271
1272         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
1273
1274         /* No need for kvm_guest_exit. It's done in handle_exit.
1275            We also get here with interrupts enabled. */
1276
1277         /* Make sure we save the guest FPU/Altivec/VSX state */
1278         kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
1279
1280 out:
1281         vcpu->mode = OUTSIDE_GUEST_MODE;
1282         return ret;
1283 }
1284
1285 /*
1286  * Get (and clear) the dirty memory log for a memory slot.
1287  */
1288 static int kvm_vm_ioctl_get_dirty_log_pr(struct kvm *kvm,
1289                                          struct kvm_dirty_log *log)
1290 {
1291         struct kvm_memory_slot *memslot;
1292         struct kvm_vcpu *vcpu;
1293         ulong ga, ga_end;
1294         int is_dirty = 0;
1295         int r;
1296         unsigned long n;
1297
1298         mutex_lock(&kvm->slots_lock);
1299
1300         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1301         if (r)
1302                 goto out;
1303
1304         /* If nothing is dirty, don't bother messing with page tables. */
1305         if (is_dirty) {
1306                 memslot = id_to_memslot(kvm->memslots, log->slot);
1307
1308                 ga = memslot->base_gfn << PAGE_SHIFT;
1309                 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1310
1311                 kvm_for_each_vcpu(n, vcpu, kvm)
1312                         kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1313
1314                 n = kvm_dirty_bitmap_bytes(memslot);
1315                 memset(memslot->dirty_bitmap, 0, n);
1316         }
1317
1318         r = 0;
1319 out:
1320         mutex_unlock(&kvm->slots_lock);
1321         return r;
1322 }
1323
1324 static void kvmppc_core_flush_memslot_pr(struct kvm *kvm,
1325                                          struct kvm_memory_slot *memslot)
1326 {
1327         return;
1328 }
1329
1330 static int kvmppc_core_prepare_memory_region_pr(struct kvm *kvm,
1331                                         struct kvm_memory_slot *memslot,
1332                                         struct kvm_userspace_memory_region *mem)
1333 {
1334         return 0;
1335 }
1336
1337 static void kvmppc_core_commit_memory_region_pr(struct kvm *kvm,
1338                                 struct kvm_userspace_memory_region *mem,
1339                                 const struct kvm_memory_slot *old)
1340 {
1341         return;
1342 }
1343
1344 static void kvmppc_core_free_memslot_pr(struct kvm_memory_slot *free,
1345                                         struct kvm_memory_slot *dont)
1346 {
1347         return;
1348 }
1349
1350 static int kvmppc_core_create_memslot_pr(struct kvm_memory_slot *slot,
1351                                          unsigned long npages)
1352 {
1353         return 0;
1354 }
1355
1356
1357 #ifdef CONFIG_PPC64
1358 static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
1359                                          struct kvm_ppc_smmu_info *info)
1360 {
1361         long int i;
1362         struct kvm_vcpu *vcpu;
1363
1364         info->flags = 0;
1365
1366         /* SLB is always 64 entries */
1367         info->slb_size = 64;
1368
1369         /* Standard 4k base page size segment */
1370         info->sps[0].page_shift = 12;
1371         info->sps[0].slb_enc = 0;
1372         info->sps[0].enc[0].page_shift = 12;
1373         info->sps[0].enc[0].pte_enc = 0;
1374
1375         /*
1376          * 64k large page size.
1377          * We only want to put this in if the CPUs we're emulating
1378          * support it, but unfortunately we don't have a vcpu easily
1379          * to hand here to test.  Just pick the first vcpu, and if
1380          * that doesn't exist yet, report the minimum capability,
1381          * i.e., no 64k pages.
1382          * 1T segment support goes along with 64k pages.
1383          */
1384         i = 1;
1385         vcpu = kvm_get_vcpu(kvm, 0);
1386         if (vcpu && (vcpu->arch.hflags & BOOK3S_HFLAG_MULTI_PGSIZE)) {
1387                 info->flags = KVM_PPC_1T_SEGMENTS;
1388                 info->sps[i].page_shift = 16;
1389                 info->sps[i].slb_enc = SLB_VSID_L | SLB_VSID_LP_01;
1390                 info->sps[i].enc[0].page_shift = 16;
1391                 info->sps[i].enc[0].pte_enc = 1;
1392                 ++i;
1393         }
1394
1395         /* Standard 16M large page size segment */
1396         info->sps[i].page_shift = 24;
1397         info->sps[i].slb_enc = SLB_VSID_L;
1398         info->sps[i].enc[0].page_shift = 24;
1399         info->sps[i].enc[0].pte_enc = 0;
1400
1401         return 0;
1402 }
1403 #else
1404 static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
1405                                          struct kvm_ppc_smmu_info *info)
1406 {
1407         /* We should not get called */
1408         BUG();
1409 }
1410 #endif /* CONFIG_PPC64 */
1411
1412 static unsigned int kvm_global_user_count = 0;
1413 static DEFINE_SPINLOCK(kvm_global_user_count_lock);
1414
1415 static int kvmppc_core_init_vm_pr(struct kvm *kvm)
1416 {
1417         mutex_init(&kvm->arch.hpt_mutex);
1418
1419         if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
1420                 spin_lock(&kvm_global_user_count_lock);
1421                 if (++kvm_global_user_count == 1)
1422                         pSeries_disable_reloc_on_exc();
1423                 spin_unlock(&kvm_global_user_count_lock);
1424         }
1425         return 0;
1426 }
1427
1428 static void kvmppc_core_destroy_vm_pr(struct kvm *kvm)
1429 {
1430 #ifdef CONFIG_PPC64
1431         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
1432 #endif
1433
1434         if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
1435                 spin_lock(&kvm_global_user_count_lock);
1436                 BUG_ON(kvm_global_user_count == 0);
1437                 if (--kvm_global_user_count == 0)
1438                         pSeries_enable_reloc_on_exc();
1439                 spin_unlock(&kvm_global_user_count_lock);
1440         }
1441 }
1442
1443 static int kvmppc_core_check_processor_compat_pr(void)
1444 {
1445         /* we are always compatible */
1446         return 0;
1447 }
1448
1449 static long kvm_arch_vm_ioctl_pr(struct file *filp,
1450                                  unsigned int ioctl, unsigned long arg)
1451 {
1452         return -ENOTTY;
1453 }
1454
1455 static struct kvmppc_ops kvm_ops_pr = {
1456         .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_pr,
1457         .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_pr,
1458         .get_one_reg = kvmppc_get_one_reg_pr,
1459         .set_one_reg = kvmppc_set_one_reg_pr,
1460         .vcpu_load   = kvmppc_core_vcpu_load_pr,
1461         .vcpu_put    = kvmppc_core_vcpu_put_pr,
1462         .set_msr     = kvmppc_set_msr_pr,
1463         .vcpu_run    = kvmppc_vcpu_run_pr,
1464         .vcpu_create = kvmppc_core_vcpu_create_pr,
1465         .vcpu_free   = kvmppc_core_vcpu_free_pr,
1466         .check_requests = kvmppc_core_check_requests_pr,
1467         .get_dirty_log = kvm_vm_ioctl_get_dirty_log_pr,
1468         .flush_memslot = kvmppc_core_flush_memslot_pr,
1469         .prepare_memory_region = kvmppc_core_prepare_memory_region_pr,
1470         .commit_memory_region = kvmppc_core_commit_memory_region_pr,
1471         .unmap_hva = kvm_unmap_hva_pr,
1472         .unmap_hva_range = kvm_unmap_hva_range_pr,
1473         .age_hva  = kvm_age_hva_pr,
1474         .test_age_hva = kvm_test_age_hva_pr,
1475         .set_spte_hva = kvm_set_spte_hva_pr,
1476         .mmu_destroy  = kvmppc_mmu_destroy_pr,
1477         .free_memslot = kvmppc_core_free_memslot_pr,
1478         .create_memslot = kvmppc_core_create_memslot_pr,
1479         .init_vm = kvmppc_core_init_vm_pr,
1480         .destroy_vm = kvmppc_core_destroy_vm_pr,
1481         .get_smmu_info = kvm_vm_ioctl_get_smmu_info_pr,
1482         .emulate_op = kvmppc_core_emulate_op_pr,
1483         .emulate_mtspr = kvmppc_core_emulate_mtspr_pr,
1484         .emulate_mfspr = kvmppc_core_emulate_mfspr_pr,
1485         .fast_vcpu_kick = kvm_vcpu_kick,
1486         .arch_vm_ioctl  = kvm_arch_vm_ioctl_pr,
1487 };
1488
1489
1490 int kvmppc_book3s_init_pr(void)
1491 {
1492         int r;
1493
1494         r = kvmppc_core_check_processor_compat_pr();
1495         if (r < 0)
1496                 return r;
1497
1498         kvm_ops_pr.owner = THIS_MODULE;
1499         kvmppc_pr_ops = &kvm_ops_pr;
1500
1501         r = kvmppc_mmu_hpte_sysinit();
1502         return r;
1503 }
1504
1505 void kvmppc_book3s_exit_pr(void)
1506 {
1507         kvmppc_pr_ops = NULL;
1508         kvmppc_mmu_hpte_sysexit();
1509 }
1510
1511 /*
1512  * We only support separate modules for book3s 64
1513  */
1514 #ifdef CONFIG_PPC_BOOK3S_64
1515
1516 module_init(kvmppc_book3s_init_pr);
1517 module_exit(kvmppc_book3s_exit_pr);
1518
1519 MODULE_LICENSE("GPL");
1520 MODULE_ALIAS_MISCDEV(KVM_MINOR);
1521 MODULE_ALIAS("devname:kvm");
1522 #endif