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 <linux/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/setup.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 static void kvmppc_giveup_fac(struct kvm_vcpu *vcpu, ulong fac);
  57
  58 /* Some compatibility defines */
  59 #ifdef CONFIG_PPC_BOOK3S_32
  60 #define MSR_USER32 MSR_USER
  61 #define MSR_USER64 MSR_USER
  62 #define HW_PAGE_SIZE PAGE_SIZE
  63 #define HPTE_R_M   _PAGE_COHERENT
  64 #endif
  65
  66 static bool kvmppc_is_split_real(struct kvm_vcpu *vcpu)
  67 {
  68         ulong msr = kvmppc_get_msr(vcpu);
  69         return (msr & (MSR_IR|MSR_DR)) == MSR_DR;
  70 }
  71
  72 static void kvmppc_fixup_split_real(struct kvm_vcpu *vcpu)
  73 {
  74         ulong msr = kvmppc_get_msr(vcpu);
  75         ulong pc = kvmppc_get_pc(vcpu);
  76
  77         /* We are in DR only split real mode */
  78         if ((msr & (MSR_IR|MSR_DR)) != MSR_DR)
  79                 return;
  80
  81         /* We have not fixed up the guest already */
  82         if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK)
  83                 return;
  84
  85         /* The code is in fixupable address space */
  86         if (pc & SPLIT_HACK_MASK)
  87                 return;
  88
  89         vcpu->arch.hflags |= BOOK3S_HFLAG_SPLIT_HACK;
  90         kvmppc_set_pc(vcpu, pc | SPLIT_HACK_OFFS);
  91 }
  92
  93 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu);
  94
  95 static void kvmppc_core_vcpu_load_pr(struct kvm_vcpu *vcpu, int cpu)
  96 {
  97 #ifdef CONFIG_PPC_BOOK3S_64
  98         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
  99         memcpy(svcpu->slb, to_book3s(vcpu)->slb_shadow, sizeof(svcpu->slb));
 100         svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
 101         svcpu->in_use = 0;
 102         svcpu_put(svcpu);
 103 #endif
 104
 105         /* Disable AIL if supported */
 106         if (cpu_has_feature(CPU_FTR_HVMODE) &&
 107             cpu_has_feature(CPU_FTR_ARCH_207S))
 108                 mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) & ~LPCR_AIL);
 109
 110         vcpu->cpu = smp_processor_id();
 111 #ifdef CONFIG_PPC_BOOK3S_32
 112         current->thread.kvm_shadow_vcpu = vcpu->arch.shadow_vcpu;
 113 #endif
 114
 115         if (kvmppc_is_split_real(vcpu))
 116                 kvmppc_fixup_split_real(vcpu);
 117 }
 118
 119 static void kvmppc_core_vcpu_put_pr(struct kvm_vcpu *vcpu)
 120 {
 121 #ifdef CONFIG_PPC_BOOK3S_64
 122         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 123         if (svcpu->in_use) {
 124                 kvmppc_copy_from_svcpu(vcpu);
 125         }
 126         memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
 127         to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
 128         svcpu_put(svcpu);
 129 #endif
 130
 131         if (kvmppc_is_split_real(vcpu))
 132                 kvmppc_unfixup_split_real(vcpu);
 133
 134         kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
 135         kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
 136
 137         /* Enable AIL if supported */
 138         if (cpu_has_feature(CPU_FTR_HVMODE) &&
 139             cpu_has_feature(CPU_FTR_ARCH_207S))
 140                 mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) | LPCR_AIL_3);
 141
 142         vcpu->cpu = -1;
 143 }
 144
 145 /* Copy data needed by real-mode code from vcpu to shadow vcpu */
 146 void kvmppc_copy_to_svcpu(struct kvm_vcpu *vcpu)
 147 {
 148         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 149
 150         svcpu->gpr[0] = vcpu->arch.gpr[0];
 151         svcpu->gpr[1] = vcpu->arch.gpr[1];
 152         svcpu->gpr[2] = vcpu->arch.gpr[2];
 153         svcpu->gpr[3] = vcpu->arch.gpr[3];
 154         svcpu->gpr[4] = vcpu->arch.gpr[4];
 155         svcpu->gpr[5] = vcpu->arch.gpr[5];
 156         svcpu->gpr[6] = vcpu->arch.gpr[6];
 157         svcpu->gpr[7] = vcpu->arch.gpr[7];
 158         svcpu->gpr[8] = vcpu->arch.gpr[8];
 159         svcpu->gpr[9] = vcpu->arch.gpr[9];
 160         svcpu->gpr[10] = vcpu->arch.gpr[10];
 161         svcpu->gpr[11] = vcpu->arch.gpr[11];
 162         svcpu->gpr[12] = vcpu->arch.gpr[12];
 163         svcpu->gpr[13] = vcpu->arch.gpr[13];
 164         svcpu->cr  = vcpu->arch.cr;
 165         svcpu->xer = vcpu->arch.xer;
 166         svcpu->ctr = vcpu->arch.ctr;
 167         svcpu->lr  = vcpu->arch.lr;
 168         svcpu->pc  = vcpu->arch.pc;
 169 #ifdef CONFIG_PPC_BOOK3S_64
 170         svcpu->shadow_fscr = vcpu->arch.shadow_fscr;
 171 #endif
 172         /*
 173          * Now also save the current time base value. We use this
 174          * to find the guest purr and spurr value.
 175          */
 176         vcpu->arch.entry_tb = get_tb();
 177         vcpu->arch.entry_vtb = get_vtb();
 178         if (cpu_has_feature(CPU_FTR_ARCH_207S))
 179                 vcpu->arch.entry_ic = mfspr(SPRN_IC);
 180         svcpu->in_use = true;
 181
 182         svcpu_put(svcpu);
 183 }
 184
 185 /* Copy data touched by real-mode code from shadow vcpu back to vcpu */
 186 void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu)
 187 {
 188         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 189
 190         /*
 191          * Maybe we were already preempted and synced the svcpu from
 192          * our preempt notifiers. Don't bother touching this svcpu then.
 193          */
 194         if (!svcpu->in_use)
 195                 goto out;
 196
 197         vcpu->arch.gpr[0] = svcpu->gpr[0];
 198         vcpu->arch.gpr[1] = svcpu->gpr[1];
 199         vcpu->arch.gpr[2] = svcpu->gpr[2];
 200         vcpu->arch.gpr[3] = svcpu->gpr[3];
 201         vcpu->arch.gpr[4] = svcpu->gpr[4];
 202         vcpu->arch.gpr[5] = svcpu->gpr[5];
 203         vcpu->arch.gpr[6] = svcpu->gpr[6];
 204         vcpu->arch.gpr[7] = svcpu->gpr[7];
 205         vcpu->arch.gpr[8] = svcpu->gpr[8];
 206         vcpu->arch.gpr[9] = svcpu->gpr[9];
 207         vcpu->arch.gpr[10] = svcpu->gpr[10];
 208         vcpu->arch.gpr[11] = svcpu->gpr[11];
 209         vcpu->arch.gpr[12] = svcpu->gpr[12];
 210         vcpu->arch.gpr[13] = svcpu->gpr[13];
 211         vcpu->arch.cr  = svcpu->cr;
 212         vcpu->arch.xer = svcpu->xer;
 213         vcpu->arch.ctr = svcpu->ctr;
 214         vcpu->arch.lr  = svcpu->lr;
 215         vcpu->arch.pc  = svcpu->pc;
 216         vcpu->arch.shadow_srr1 = svcpu->shadow_srr1;
 217         vcpu->arch.fault_dar   = svcpu->fault_dar;
 218         vcpu->arch.fault_dsisr = svcpu->fault_dsisr;
 219         vcpu->arch.last_inst   = svcpu->last_inst;
 220 #ifdef CONFIG_PPC_BOOK3S_64
 221         vcpu->arch.shadow_fscr = svcpu->shadow_fscr;
 222 #endif
 223         /*
 224          * Update purr and spurr using time base on exit.
 225          */
 226         vcpu->arch.purr += get_tb() - vcpu->arch.entry_tb;
 227         vcpu->arch.spurr += get_tb() - vcpu->arch.entry_tb;
 228         to_book3s(vcpu)->vtb += get_vtb() - vcpu->arch.entry_vtb;
 229         if (cpu_has_feature(CPU_FTR_ARCH_207S))
 230                 vcpu->arch.ic += mfspr(SPRN_IC) - vcpu->arch.entry_ic;
 231         svcpu->in_use = false;
 232
 233 out:
 234         svcpu_put(svcpu);
 235 }
 236
 237 static int kvmppc_core_check_requests_pr(struct kvm_vcpu *vcpu)
 238 {
 239         int r = 1; /* Indicate we want to get back into the guest */
 240
 241         /* We misuse TLB_FLUSH to indicate that we want to clear
 242            all shadow cache entries */
 243         if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
 244                 kvmppc_mmu_pte_flush(vcpu, 0, 0);
 245
 246         return r;
 247 }
 248
 249 /************* MMU Notifiers *************/
 250 static void do_kvm_unmap_hva(struct kvm *kvm, unsigned long start,
 251                              unsigned long end)
 252 {
 253         long i;
 254         struct kvm_vcpu *vcpu;
 255         struct kvm_memslots *slots;
 256         struct kvm_memory_slot *memslot;
 257
 258         slots = kvm_memslots(kvm);
 259         kvm_for_each_memslot(memslot, slots) {
 260                 unsigned long hva_start, hva_end;
 261                 gfn_t gfn, gfn_end;
 262
 263                 hva_start = max(start, memslot->userspace_addr);
 264                 hva_end = min(end, memslot->userspace_addr +
 265                                         (memslot->npages << PAGE_SHIFT));
 266                 if (hva_start >= hva_end)
 267                         continue;
 268                 /*
 269                  * {gfn(page) | page intersects with [hva_start, hva_end)} =
 270                  * {gfn, gfn+1, ..., gfn_end-1}.
 271                  */
 272                 gfn = hva_to_gfn_memslot(hva_start, memslot);
 273                 gfn_end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, memslot);
 274                 kvm_for_each_vcpu(i, vcpu, kvm)
 275                         kvmppc_mmu_pte_pflush(vcpu, gfn << PAGE_SHIFT,
 276                                               gfn_end << PAGE_SHIFT);
 277         }
 278 }
 279
 280 static int kvm_unmap_hva_pr(struct kvm *kvm, unsigned long hva)
 281 {
 282         trace_kvm_unmap_hva(hva);
 283
 284         do_kvm_unmap_hva(kvm, hva, hva + PAGE_SIZE);
 285
 286         return 0;
 287 }
 288
 289 static int kvm_unmap_hva_range_pr(struct kvm *kvm, unsigned long start,
 290                                   unsigned long end)
 291 {
 292         do_kvm_unmap_hva(kvm, start, end);
 293
 294         return 0;
 295 }
 296
 297 static int kvm_age_hva_pr(struct kvm *kvm, unsigned long start,
 298                           unsigned long end)
 299 {
 300         /* XXX could be more clever ;) */
 301         return 0;
 302 }
 303
 304 static int kvm_test_age_hva_pr(struct kvm *kvm, unsigned long hva)
 305 {
 306         /* XXX could be more clever ;) */
 307         return 0;
 308 }
 309
 310 static void kvm_set_spte_hva_pr(struct kvm *kvm, unsigned long hva, pte_t pte)
 311 {
 312         /* The page will get remapped properly on its next fault */
 313         do_kvm_unmap_hva(kvm, hva, hva + PAGE_SIZE);
 314 }
 315
 316 /*****************************************/
 317
 318 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
 319 {
 320         ulong guest_msr = kvmppc_get_msr(vcpu);
 321         ulong smsr = guest_msr;
 322
 323         /* Guest MSR values */
 324         smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_LE;
 325         /* Process MSR values */
 326         smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
 327         /* External providers the guest reserved */
 328         smsr |= (guest_msr & vcpu->arch.guest_owned_ext);
 329         /* 64-bit Process MSR values */
 330 #ifdef CONFIG_PPC_BOOK3S_64
 331         smsr |= MSR_ISF | MSR_HV;
 332 #endif
 333         vcpu->arch.shadow_msr = smsr;
 334 }
 335
 336 static void kvmppc_set_msr_pr(struct kvm_vcpu *vcpu, u64 msr)
 337 {
 338         ulong old_msr = kvmppc_get_msr(vcpu);
 339
 340 #ifdef EXIT_DEBUG
 341         printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
 342 #endif
 343
 344         msr &= to_book3s(vcpu)->msr_mask;
 345         kvmppc_set_msr_fast(vcpu, msr);
 346         kvmppc_recalc_shadow_msr(vcpu);
 347
 348         if (msr & MSR_POW) {
 349                 if (!vcpu->arch.pending_exceptions) {
 350                         kvm_vcpu_block(vcpu);
 351                         kvm_clear_request(KVM_REQ_UNHALT, vcpu);
 352                         vcpu->stat.halt_wakeup++;
 353
 354                         /* Unset POW bit after we woke up */
 355                         msr &= ~MSR_POW;
 356                         kvmppc_set_msr_fast(vcpu, msr);
 357                 }
 358         }
 359
 360         if (kvmppc_is_split_real(vcpu))
 361                 kvmppc_fixup_split_real(vcpu);
 362         else
 363                 kvmppc_unfixup_split_real(vcpu);
 364
 365         if ((kvmppc_get_msr(vcpu) & (MSR_PR|MSR_IR|MSR_DR)) !=
 366                    (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
 367                 kvmppc_mmu_flush_segments(vcpu);
 368                 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
 369
 370                 /* Preload magic page segment when in kernel mode */
 371                 if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
 372                         struct kvm_vcpu_arch *a = &vcpu->arch;
 373
 374                         if (msr & MSR_DR)
 375                                 kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
 376                         else
 377                                 kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
 378                 }
 379         }
 380
 381         /*
 382          * When switching from 32 to 64-bit, we may have a stale 32-bit
 383          * magic page around, we need to flush it. Typically 32-bit magic
 384          * page will be instanciated when calling into RTAS. Note: We
 385          * assume that such transition only happens while in kernel mode,
 386          * ie, we never transition from user 32-bit to kernel 64-bit with
 387          * a 32-bit magic page around.
 388          */
 389         if (vcpu->arch.magic_page_pa &&
 390             !(old_msr & MSR_PR) && !(old_msr & MSR_SF) && (msr & MSR_SF)) {
 391                 /* going from RTAS to normal kernel code */
 392                 kvmppc_mmu_pte_flush(vcpu, (uint32_t)vcpu->arch.magic_page_pa,
 393                                      ~0xFFFUL);
 394         }
 395
 396         /* Preload FPU if it's enabled */
 397         if (kvmppc_get_msr(vcpu) & MSR_FP)
 398                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
 399 }
 400
 401 void kvmppc_set_pvr_pr(struct kvm_vcpu *vcpu, u32 pvr)
 402 {
 403         u32 host_pvr;
 404
 405         vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
 406         vcpu->arch.pvr = pvr;
 407 #ifdef CONFIG_PPC_BOOK3S_64
 408         if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
 409                 kvmppc_mmu_book3s_64_init(vcpu);
 410                 if (!to_book3s(vcpu)->hior_explicit)
 411                         to_book3s(vcpu)->hior = 0xfff00000;
 412                 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
 413                 vcpu->arch.cpu_type = KVM_CPU_3S_64;
 414         } else
 415 #endif
 416         {
 417                 kvmppc_mmu_book3s_32_init(vcpu);
 418                 if (!to_book3s(vcpu)->hior_explicit)
 419                         to_book3s(vcpu)->hior = 0;
 420                 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
 421                 vcpu->arch.cpu_type = KVM_CPU_3S_32;
 422         }
 423
 424         kvmppc_sanity_check(vcpu);
 425
 426         /* If we are in hypervisor level on 970, we can tell the CPU to
 427          * treat DCBZ as 32 bytes store */
 428         vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
 429         if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
 430             !strcmp(cur_cpu_spec->platform, "ppc970"))
 431                 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 432
 433         /* Cell performs badly if MSR_FEx are set. So let's hope nobody
 434            really needs them in a VM on Cell and force disable them. */
 435         if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
 436                 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
 437
 438         /*
 439          * If they're asking for POWER6 or later, set the flag
 440          * indicating that we can do multiple large page sizes
 441          * and 1TB segments.
 442          * Also set the flag that indicates that tlbie has the large
 443          * page bit in the RB operand instead of the instruction.
 444          */
 445         switch (PVR_VER(pvr)) {
 446         case PVR_POWER6:
 447         case PVR_POWER7:
 448         case PVR_POWER7p:
 449         case PVR_POWER8:
 450         case PVR_POWER8E:
 451         case PVR_POWER8NVL:
 452                 vcpu->arch.hflags |= BOOK3S_HFLAG_MULTI_PGSIZE |
 453                         BOOK3S_HFLAG_NEW_TLBIE;
 454                 break;
 455         }
 456
 457 #ifdef CONFIG_PPC_BOOK3S_32
 458         /* 32 bit Book3S always has 32 byte dcbz */
 459         vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 460 #endif
 461
 462         /* On some CPUs we can execute paired single operations natively */
 463         asm ( "mfpvr %0" : "=r"(host_pvr));
 464         switch (host_pvr) {
 465         case 0x00080200:        /* lonestar 2.0 */
 466         case 0x00088202:        /* lonestar 2.2 */
 467         case 0x70000100:        /* gekko 1.0 */
 468         case 0x00080100:        /* gekko 2.0 */
 469         case 0x00083203:        /* gekko 2.3a */
 470         case 0x00083213:        /* gekko 2.3b */
 471         case 0x00083204:        /* gekko 2.4 */
 472         case 0x00083214:        /* gekko 2.4e (8SE) - retail HW2 */
 473         case 0x00087200:        /* broadway */
 474                 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
 475                 /* Enable HID2.PSE - in case we need it later */
 476                 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
 477         }
 478 }
 479
 480 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
 481  * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
 482  * emulate 32 bytes dcbz length.
 483  *
 484  * The Book3s_64 inventors also realized this case and implemented a special bit
 485  * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
 486  *
 487  * My approach here is to patch the dcbz instruction on executing pages.
 488  */
 489 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
 490 {
 491         struct page *hpage;
 492         u64 hpage_offset;
 493         u32 *page;
 494         int i;
 495
 496         hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 497         if (is_error_page(hpage))
 498                 return;
 499
 500         hpage_offset = pte->raddr & ~PAGE_MASK;
 501         hpage_offset &= ~0xFFFULL;
 502         hpage_offset /= 4;
 503
 504         get_page(hpage);
 505         page = kmap_atomic(hpage);
 506
 507         /* patch dcbz into reserved instruction, so we trap */
 508         for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
 509                 if ((be32_to_cpu(page[i]) & 0xff0007ff) == INS_DCBZ)
 510                         page[i] &= cpu_to_be32(0xfffffff7);
 511
 512         kunmap_atomic(page);
 513         put_page(hpage);
 514 }
 515
 516 static bool kvmppc_visible_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
 517 {
 518         ulong mp_pa = vcpu->arch.magic_page_pa;
 519
 520         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 521                 mp_pa = (uint32_t)mp_pa;
 522
 523         gpa &= ~0xFFFULL;
 524         if (unlikely(mp_pa) && unlikely((mp_pa & KVM_PAM) == (gpa & KVM_PAM))) {
 525                 return true;
 526         }
 527
 528         return kvm_is_visible_gfn(vcpu->kvm, gpa >> PAGE_SHIFT);
 529 }
 530
 531 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
 532                             ulong eaddr, int vec)
 533 {
 534         bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
 535         bool iswrite = false;
 536         int r = RESUME_GUEST;
 537         int relocated;
 538         int page_found = 0;
 539         struct kvmppc_pte pte = { 0 };
 540         bool dr = (kvmppc_get_msr(vcpu) & MSR_DR) ? true : false;
 541         bool ir = (kvmppc_get_msr(vcpu) & MSR_IR) ? true : false;
 542         u64 vsid;
 543
 544         relocated = data ? dr : ir;
 545         if (data && (vcpu->arch.fault_dsisr & DSISR_ISSTORE))
 546                 iswrite = true;
 547
 548         /* Resolve real address if translation turned on */
 549         if (relocated) {
 550                 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data, iswrite);
 551         } else {
 552                 pte.may_execute = true;
 553                 pte.may_read = true;
 554                 pte.may_write = true;
 555                 pte.raddr = eaddr & KVM_PAM;
 556                 pte.eaddr = eaddr;
 557                 pte.vpage = eaddr >> 12;
 558                 pte.page_size = MMU_PAGE_64K;
 559                 pte.wimg = HPTE_R_M;
 560         }
 561
 562         switch (kvmppc_get_msr(vcpu) & (MSR_DR|MSR_IR)) {
 563         case 0:
 564                 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
 565                 break;
 566         case MSR_DR:
 567                 if (!data &&
 568                     (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 569                     ((pte.raddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 570                         pte.raddr &= ~SPLIT_HACK_MASK;
 571                 /* fall through */
 572         case MSR_IR:
 573                 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
 574
 575                 if ((kvmppc_get_msr(vcpu) & (MSR_DR|MSR_IR)) == MSR_DR)
 576                         pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
 577                 else
 578                         pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
 579                 pte.vpage |= vsid;
 580
 581                 if (vsid == -1)
 582                         page_found = -EINVAL;
 583                 break;
 584         }
 585
 586         if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 587            (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
 588                 /*
 589                  * If we do the dcbz hack, we have to NX on every execution,
 590                  * so we can patch the executing code. This renders our guest
 591                  * NX-less.
 592                  */
 593                 pte.may_execute = !data;
 594         }
 595
 596         if (page_found == -ENOENT) {
 597                 /* Page not found in guest PTE entries */
 598                 u64 ssrr1 = vcpu->arch.shadow_srr1;
 599                 u64 msr = kvmppc_get_msr(vcpu);
 600                 kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
 601                 kvmppc_set_dsisr(vcpu, vcpu->arch.fault_dsisr);
 602                 kvmppc_set_msr_fast(vcpu, msr | (ssrr1 & 0xf8000000ULL));
 603                 kvmppc_book3s_queue_irqprio(vcpu, vec);
 604         } else if (page_found == -EPERM) {
 605                 /* Storage protection */
 606                 u32 dsisr = vcpu->arch.fault_dsisr;
 607                 u64 ssrr1 = vcpu->arch.shadow_srr1;
 608                 u64 msr = kvmppc_get_msr(vcpu);
 609                 kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
 610                 dsisr = (dsisr & ~DSISR_NOHPTE) | DSISR_PROTFAULT;
 611                 kvmppc_set_dsisr(vcpu, dsisr);
 612                 kvmppc_set_msr_fast(vcpu, msr | (ssrr1 & 0xf8000000ULL));
 613                 kvmppc_book3s_queue_irqprio(vcpu, vec);
 614         } else if (page_found == -EINVAL) {
 615                 /* Page not found in guest SLB */
 616                 kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
 617                 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
 618         } else if (kvmppc_visible_gpa(vcpu, pte.raddr)) {
 619                 if (data && !(vcpu->arch.fault_dsisr & DSISR_NOHPTE)) {
 620                         /*
 621                          * There is already a host HPTE there, presumably
 622                          * a read-only one for a page the guest thinks
 623                          * is writable, so get rid of it first.
 624                          */
 625                         kvmppc_mmu_unmap_page(vcpu, &pte);
 626                 }
 627                 /* The guest's PTE is not mapped yet. Map on the host */
 628                 if (kvmppc_mmu_map_page(vcpu, &pte, iswrite) == -EIO) {
 629                         /* Exit KVM if mapping failed */
 630                         run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 631                         return RESUME_HOST;
 632                 }
 633                 if (data)
 634                         vcpu->stat.sp_storage++;
 635                 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 636                          (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
 637                         kvmppc_patch_dcbz(vcpu, &pte);
 638         } else {
 639                 /* MMIO */
 640                 vcpu->stat.mmio_exits++;
 641                 vcpu->arch.paddr_accessed = pte.raddr;
 642                 vcpu->arch.vaddr_accessed = pte.eaddr;
 643                 r = kvmppc_emulate_mmio(run, vcpu);
 644                 if ( r == RESUME_HOST_NV )
 645                         r = RESUME_HOST;
 646         }
 647
 648         return r;
 649 }
 650
 651 /* Give up external provider (FPU, Altivec, VSX) */
 652 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
 653 {
 654         struct thread_struct *t = &current->thread;
 655
 656         /*
 657          * VSX instructions can access FP and vector registers, so if
 658          * we are giving up VSX, make sure we give up FP and VMX as well.
 659          */
 660         if (msr & MSR_VSX)
 661                 msr |= MSR_FP | MSR_VEC;
 662
 663         msr &= vcpu->arch.guest_owned_ext;
 664         if (!msr)
 665                 return;
 666
 667 #ifdef DEBUG_EXT
 668         printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
 669 #endif
 670
 671         if (msr & MSR_FP) {
 672                 /*
 673                  * Note that on CPUs with VSX, giveup_fpu stores
 674                  * both the traditional FP registers and the added VSX
 675                  * registers into thread.fp_state.fpr[].
 676                  */
 677                 if (t->regs->msr & MSR_FP)
 678                         giveup_fpu(current);
 679                 t->fp_save_area = NULL;
 680         }
 681
 682 #ifdef CONFIG_ALTIVEC
 683         if (msr & MSR_VEC) {
 684                 if (current->thread.regs->msr & MSR_VEC)
 685                         giveup_altivec(current);
 686                 t->vr_save_area = NULL;
 687         }
 688 #endif
 689
 690         vcpu->arch.guest_owned_ext &= ~(msr | MSR_VSX);
 691         kvmppc_recalc_shadow_msr(vcpu);
 692 }
 693
 694 /* Give up facility (TAR / EBB / DSCR) */
 695 static void kvmppc_giveup_fac(struct kvm_vcpu *vcpu, ulong fac)
 696 {
 697 #ifdef CONFIG_PPC_BOOK3S_64
 698         if (!(vcpu->arch.shadow_fscr & (1ULL << fac))) {
 699                 /* Facility not available to the guest, ignore giveup request*/
 700                 return;
 701         }
 702
 703         switch (fac) {
 704         case FSCR_TAR_LG:
 705                 vcpu->arch.tar = mfspr(SPRN_TAR);
 706                 mtspr(SPRN_TAR, current->thread.tar);
 707                 vcpu->arch.shadow_fscr &= ~FSCR_TAR;
 708                 break;
 709         }
 710 #endif
 711 }
 712
 713 /* Handle external providers (FPU, Altivec, VSX) */
 714 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
 715                              ulong msr)
 716 {
 717         struct thread_struct *t = &current->thread;
 718
 719         /* When we have paired singles, we emulate in software */
 720         if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
 721                 return RESUME_GUEST;
 722
 723         if (!(kvmppc_get_msr(vcpu) & msr)) {
 724                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 725                 return RESUME_GUEST;
 726         }
 727
 728         if (msr == MSR_VSX) {
 729                 /* No VSX?  Give an illegal instruction interrupt */
 730 #ifdef CONFIG_VSX
 731                 if (!cpu_has_feature(CPU_FTR_VSX))
 732 #endif
 733                 {
 734                         kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
 735                         return RESUME_GUEST;
 736                 }
 737
 738                 /*
 739                  * We have to load up all the FP and VMX registers before
 740                  * we can let the guest use VSX instructions.
 741                  */
 742                 msr = MSR_FP | MSR_VEC | MSR_VSX;
 743         }
 744
 745         /* See if we already own all the ext(s) needed */
 746         msr &= ~vcpu->arch.guest_owned_ext;
 747         if (!msr)
 748                 return RESUME_GUEST;
 749
 750 #ifdef DEBUG_EXT
 751         printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
 752 #endif
 753
 754         if (msr & MSR_FP) {
 755                 preempt_disable();
 756                 enable_kernel_fp();
 757                 load_fp_state(&vcpu->arch.fp);
 758                 disable_kernel_fp();
 759                 t->fp_save_area = &vcpu->arch.fp;
 760                 preempt_enable();
 761         }
 762
 763         if (msr & MSR_VEC) {
 764 #ifdef CONFIG_ALTIVEC
 765                 preempt_disable();
 766                 enable_kernel_altivec();
 767                 load_vr_state(&vcpu->arch.vr);
 768                 disable_kernel_altivec();
 769                 t->vr_save_area = &vcpu->arch.vr;
 770                 preempt_enable();
 771 #endif
 772         }
 773
 774         t->regs->msr |= msr;
 775         vcpu->arch.guest_owned_ext |= msr;
 776         kvmppc_recalc_shadow_msr(vcpu);
 777
 778         return RESUME_GUEST;
 779 }
 780
 781 /*
 782  * Kernel code using FP or VMX could have flushed guest state to
 783  * the thread_struct; if so, get it back now.
 784  */
 785 static void kvmppc_handle_lost_ext(struct kvm_vcpu *vcpu)
 786 {
 787         unsigned long lost_ext;
 788
 789         lost_ext = vcpu->arch.guest_owned_ext & ~current->thread.regs->msr;
 790         if (!lost_ext)
 791                 return;
 792
 793         if (lost_ext & MSR_FP) {
 794                 preempt_disable();
 795                 enable_kernel_fp();
 796                 load_fp_state(&vcpu->arch.fp);
 797                 disable_kernel_fp();
 798                 preempt_enable();
 799         }
 800 #ifdef CONFIG_ALTIVEC
 801         if (lost_ext & MSR_VEC) {
 802                 preempt_disable();
 803                 enable_kernel_altivec();
 804                 load_vr_state(&vcpu->arch.vr);
 805                 disable_kernel_altivec();
 806                 preempt_enable();
 807         }
 808 #endif
 809         current->thread.regs->msr |= lost_ext;
 810 }
 811
 812 #ifdef CONFIG_PPC_BOOK3S_64
 813
 814 static void kvmppc_trigger_fac_interrupt(struct kvm_vcpu *vcpu, ulong fac)
 815 {
 816         /* Inject the Interrupt Cause field and trigger a guest interrupt */
 817         vcpu->arch.fscr &= ~(0xffULL << 56);
 818         vcpu->arch.fscr |= (fac << 56);
 819         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_FAC_UNAVAIL);
 820 }
 821
 822 static void kvmppc_emulate_fac(struct kvm_vcpu *vcpu, ulong fac)
 823 {
 824         enum emulation_result er = EMULATE_FAIL;
 825
 826         if (!(kvmppc_get_msr(vcpu) & MSR_PR))
 827                 er = kvmppc_emulate_instruction(vcpu->run, vcpu);
 828
 829         if ((er != EMULATE_DONE) && (er != EMULATE_AGAIN)) {
 830                 /* Couldn't emulate, trigger interrupt in guest */
 831                 kvmppc_trigger_fac_interrupt(vcpu, fac);
 832         }
 833 }
 834
 835 /* Enable facilities (TAR, EBB, DSCR) for the guest */
 836 static int kvmppc_handle_fac(struct kvm_vcpu *vcpu, ulong fac)
 837 {
 838         bool guest_fac_enabled;
 839         BUG_ON(!cpu_has_feature(CPU_FTR_ARCH_207S));
 840
 841         /*
 842          * Not every facility is enabled by FSCR bits, check whether the
 843          * guest has this facility enabled at all.
 844          */
 845         switch (fac) {
 846         case FSCR_TAR_LG:
 847         case FSCR_EBB_LG:
 848                 guest_fac_enabled = (vcpu->arch.fscr & (1ULL << fac));
 849                 break;
 850         case FSCR_TM_LG:
 851                 guest_fac_enabled = kvmppc_get_msr(vcpu) & MSR_TM;
 852                 break;
 853         default:
 854                 guest_fac_enabled = false;
 855                 break;
 856         }
 857
 858         if (!guest_fac_enabled) {
 859                 /* Facility not enabled by the guest */
 860                 kvmppc_trigger_fac_interrupt(vcpu, fac);
 861                 return RESUME_GUEST;
 862         }
 863
 864         switch (fac) {
 865         case FSCR_TAR_LG:
 866                 /* TAR switching isn't lazy in Linux yet */
 867                 current->thread.tar = mfspr(SPRN_TAR);
 868                 mtspr(SPRN_TAR, vcpu->arch.tar);
 869                 vcpu->arch.shadow_fscr |= FSCR_TAR;
 870                 break;
 871         default:
 872                 kvmppc_emulate_fac(vcpu, fac);
 873                 break;
 874         }
 875
 876         return RESUME_GUEST;
 877 }
 878
 879 void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr)
 880 {
 881         if ((vcpu->arch.fscr & FSCR_TAR) && !(fscr & FSCR_TAR)) {
 882                 /* TAR got dropped, drop it in shadow too */
 883                 kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
 884         }
 885         vcpu->arch.fscr = fscr;
 886 }
 887 #endif
 888
 889 static void kvmppc_setup_debug(struct kvm_vcpu *vcpu)
 890 {
 891         if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
 892                 u64 msr = kvmppc_get_msr(vcpu);
 893
 894                 kvmppc_set_msr(vcpu, msr | MSR_SE);
 895         }
 896 }
 897
 898 static void kvmppc_clear_debug(struct kvm_vcpu *vcpu)
 899 {
 900         if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
 901                 u64 msr = kvmppc_get_msr(vcpu);
 902
 903                 kvmppc_set_msr(vcpu, msr & ~MSR_SE);
 904         }
 905 }
 906
 907 static int kvmppc_exit_pr_progint(struct kvm_run *run, struct kvm_vcpu *vcpu,
 908                                   unsigned int exit_nr)
 909 {
 910         enum emulation_result er;
 911         ulong flags;
 912         u32 last_inst;
 913         int emul, r;
 914
 915         /*
 916          * shadow_srr1 only contains valid flags if we came here via a program
 917          * exception. The other exceptions (emulation assist, FP unavailable,
 918          * etc.) do not provide flags in SRR1, so use an illegal-instruction
 919          * exception when injecting a program interrupt into the guest.
 920          */
 921         if (exit_nr == BOOK3S_INTERRUPT_PROGRAM)
 922                 flags = vcpu->arch.shadow_srr1 & 0x1f0000ull;
 923         else
 924                 flags = SRR1_PROGILL;
 925
 926         emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 927         if (emul != EMULATE_DONE)
 928                 return RESUME_GUEST;
 929
 930         if (kvmppc_get_msr(vcpu) & MSR_PR) {
 931 #ifdef EXIT_DEBUG
 932                 pr_info("Userspace triggered 0x700 exception at\n 0x%lx (0x%x)\n",
 933                         kvmppc_get_pc(vcpu), last_inst);
 934 #endif
 935                 if ((last_inst & 0xff0007ff) != (INS_DCBZ & 0xfffffff7)) {
 936                         kvmppc_core_queue_program(vcpu, flags);
 937                         return RESUME_GUEST;
 938                 }
 939         }
 940
 941         vcpu->stat.emulated_inst_exits++;
 942         er = kvmppc_emulate_instruction(run, vcpu);
 943         switch (er) {
 944         case EMULATE_DONE:
 945                 r = RESUME_GUEST_NV;
 946                 break;
 947         case EMULATE_AGAIN:
 948                 r = RESUME_GUEST;
 949                 break;
 950         case EMULATE_FAIL:
 951                 pr_crit("%s: emulation at %lx failed (%08x)\n",
 952                         __func__, kvmppc_get_pc(vcpu), last_inst);
 953                 kvmppc_core_queue_program(vcpu, flags);
 954                 r = RESUME_GUEST;
 955                 break;
 956         case EMULATE_DO_MMIO:
 957                 run->exit_reason = KVM_EXIT_MMIO;
 958                 r = RESUME_HOST_NV;
 959                 break;
 960         case EMULATE_EXIT_USER:
 961                 r = RESUME_HOST_NV;
 962                 break;
 963         default:
 964                 BUG();
 965         }
 966
 967         return r;
 968 }
 969
 970 int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
 971                           unsigned int exit_nr)
 972 {
 973         int r = RESUME_HOST;
 974         int s;
 975
 976         vcpu->stat.sum_exits++;
 977
 978         run->exit_reason = KVM_EXIT_UNKNOWN;
 979         run->ready_for_interrupt_injection = 1;
 980
 981         /* We get here with MSR.EE=1 */
 982
 983         trace_kvm_exit(exit_nr, vcpu);
 984         guest_exit();
 985
 986         switch (exit_nr) {
 987         case BOOK3S_INTERRUPT_INST_STORAGE:
 988         {
 989                 ulong shadow_srr1 = vcpu->arch.shadow_srr1;
 990                 vcpu->stat.pf_instruc++;
 991
 992                 if (kvmppc_is_split_real(vcpu))
 993                         kvmppc_fixup_split_real(vcpu);
 994
 995 #ifdef CONFIG_PPC_BOOK3S_32
 996                 /* We set segments as unused segments when invalidating them. So
 997                  * treat the respective fault as segment fault. */
 998                 {
 999                         struct kvmppc_book3s_shadow_vcpu *svcpu;
1000                         u32 sr;
1001
1002                         svcpu = svcpu_get(vcpu);
1003                         sr = svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT];
1004                         svcpu_put(svcpu);
1005                         if (sr == SR_INVALID) {
1006                                 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
1007                                 r = RESUME_GUEST;
1008                                 break;
1009                         }
1010                 }
1011 #endif
1012
1013                 /* only care about PTEG not found errors, but leave NX alone */
1014                 if (shadow_srr1 & 0x40000000) {
1015                         int idx = srcu_read_lock(&vcpu->kvm->srcu);
1016                         r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
1017                         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1018                         vcpu->stat.sp_instruc++;
1019                 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
1020                           (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
1021                         /*
1022                          * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
1023                          *     so we can't use the NX bit inside the guest. Let's cross our fingers,
1024                          *     that no guest that needs the dcbz hack does NX.
1025                          */
1026                         kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
1027                         r = RESUME_GUEST;
1028                 } else {
1029                         u64 msr = kvmppc_get_msr(vcpu);
1030                         msr |= shadow_srr1 & 0x58000000;
1031                         kvmppc_set_msr_fast(vcpu, msr);
1032                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1033                         r = RESUME_GUEST;
1034                 }
1035                 break;
1036         }
1037         case BOOK3S_INTERRUPT_DATA_STORAGE:
1038         {
1039                 ulong dar = kvmppc_get_fault_dar(vcpu);
1040                 u32 fault_dsisr = vcpu->arch.fault_dsisr;
1041                 vcpu->stat.pf_storage++;
1042
1043 #ifdef CONFIG_PPC_BOOK3S_32
1044                 /* We set segments as unused segments when invalidating them. So
1045                  * treat the respective fault as segment fault. */
1046                 {
1047                         struct kvmppc_book3s_shadow_vcpu *svcpu;
1048                         u32 sr;
1049
1050                         svcpu = svcpu_get(vcpu);
1051                         sr = svcpu->sr[dar >> SID_SHIFT];
1052                         svcpu_put(svcpu);
1053                         if (sr == SR_INVALID) {
1054                                 kvmppc_mmu_map_segment(vcpu, dar);
1055                                 r = RESUME_GUEST;
1056                                 break;
1057                         }
1058                 }
1059 #endif
1060
1061                 /*
1062                  * We need to handle missing shadow PTEs, and
1063                  * protection faults due to us mapping a page read-only
1064                  * when the guest thinks it is writable.
1065                  */
1066                 if (fault_dsisr & (DSISR_NOHPTE | DSISR_PROTFAULT)) {
1067                         int idx = srcu_read_lock(&vcpu->kvm->srcu);
1068                         r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
1069                         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1070                 } else {
1071                         kvmppc_set_dar(vcpu, dar);
1072                         kvmppc_set_dsisr(vcpu, fault_dsisr);
1073                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1074                         r = RESUME_GUEST;
1075                 }
1076                 break;
1077         }
1078         case BOOK3S_INTERRUPT_DATA_SEGMENT:
1079                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
1080                         kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
1081                         kvmppc_book3s_queue_irqprio(vcpu,
1082                                 BOOK3S_INTERRUPT_DATA_SEGMENT);
1083                 }
1084                 r = RESUME_GUEST;
1085                 break;
1086         case BOOK3S_INTERRUPT_INST_SEGMENT:
1087                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
1088                         kvmppc_book3s_queue_irqprio(vcpu,
1089                                 BOOK3S_INTERRUPT_INST_SEGMENT);
1090                 }
1091                 r = RESUME_GUEST;
1092                 break;
1093         /* We're good on these - the host merely wanted to get our attention */
1094         case BOOK3S_INTERRUPT_DECREMENTER:
1095         case BOOK3S_INTERRUPT_HV_DECREMENTER:
1096         case BOOK3S_INTERRUPT_DOORBELL:
1097         case BOOK3S_INTERRUPT_H_DOORBELL:
1098                 vcpu->stat.dec_exits++;
1099                 r = RESUME_GUEST;
1100                 break;
1101         case BOOK3S_INTERRUPT_EXTERNAL:
1102         case BOOK3S_INTERRUPT_EXTERNAL_LEVEL:
1103         case BOOK3S_INTERRUPT_EXTERNAL_HV:
1104                 vcpu->stat.ext_intr_exits++;
1105                 r = RESUME_GUEST;
1106                 break;
1107         case BOOK3S_INTERRUPT_PERFMON:
1108                 r = RESUME_GUEST;
1109                 break;
1110         case BOOK3S_INTERRUPT_PROGRAM:
1111         case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
1112                 r = kvmppc_exit_pr_progint(run, vcpu, exit_nr);
1113                 break;
1114         case BOOK3S_INTERRUPT_SYSCALL:
1115         {
1116                 u32 last_sc;
1117                 int emul;
1118
1119                 /* Get last sc for papr */
1120                 if (vcpu->arch.papr_enabled) {
1121                         /* The sc instuction points SRR0 to the next inst */
1122                         emul = kvmppc_get_last_inst(vcpu, INST_SC, &last_sc);
1123                         if (emul != EMULATE_DONE) {
1124                                 kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) - 4);
1125                                 r = RESUME_GUEST;
1126                                 break;
1127                         }
1128                 }
1129
1130                 if (vcpu->arch.papr_enabled &&
1131                     (last_sc == 0x44000022) &&
1132                     !(kvmppc_get_msr(vcpu) & MSR_PR)) {
1133                         /* SC 1 papr hypercalls */
1134                         ulong cmd = kvmppc_get_gpr(vcpu, 3);
1135                         int i;
1136
1137 #ifdef CONFIG_PPC_BOOK3S_64
1138                         if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
1139                                 r = RESUME_GUEST;
1140                                 break;
1141                         }
1142 #endif
1143
1144                         run->papr_hcall.nr = cmd;
1145                         for (i = 0; i < 9; ++i) {
1146                                 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
1147                                 run->papr_hcall.args[i] = gpr;
1148                         }
1149                         run->exit_reason = KVM_EXIT_PAPR_HCALL;
1150                         vcpu->arch.hcall_needed = 1;
1151                         r = RESUME_HOST;
1152                 } else if (vcpu->arch.osi_enabled &&
1153                     (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
1154                     (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
1155                         /* MOL hypercalls */
1156                         u64 *gprs = run->osi.gprs;
1157                         int i;
1158
1159                         run->exit_reason = KVM_EXIT_OSI;
1160                         for (i = 0; i < 32; i++)
1161                                 gprs[i] = kvmppc_get_gpr(vcpu, i);
1162                         vcpu->arch.osi_needed = 1;
1163                         r = RESUME_HOST_NV;
1164                 } else if (!(kvmppc_get_msr(vcpu) & MSR_PR) &&
1165                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1166                         /* KVM PV hypercalls */
1167                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1168                         r = RESUME_GUEST;
1169                 } else {
1170                         /* Guest syscalls */
1171                         vcpu->stat.syscall_exits++;
1172                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1173                         r = RESUME_GUEST;
1174                 }
1175                 break;
1176         }
1177         case BOOK3S_INTERRUPT_FP_UNAVAIL:
1178         case BOOK3S_INTERRUPT_ALTIVEC:
1179         case BOOK3S_INTERRUPT_VSX:
1180         {
1181                 int ext_msr = 0;
1182                 int emul;
1183                 u32 last_inst;
1184
1185                 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE) {
1186                         /* Do paired single instruction emulation */
1187                         emul = kvmppc_get_last_inst(vcpu, INST_GENERIC,
1188                                                     &last_inst);
1189                         if (emul == EMULATE_DONE)
1190                                 r = kvmppc_exit_pr_progint(run, vcpu, exit_nr);
1191                         else
1192                                 r = RESUME_GUEST;
1193
1194                         break;
1195                 }
1196
1197                 /* Enable external provider */
1198                 switch (exit_nr) {
1199                 case BOOK3S_INTERRUPT_FP_UNAVAIL:
1200                         ext_msr = MSR_FP;
1201                         break;
1202
1203                 case BOOK3S_INTERRUPT_ALTIVEC:
1204                         ext_msr = MSR_VEC;
1205                         break;
1206
1207                 case BOOK3S_INTERRUPT_VSX:
1208                         ext_msr = MSR_VSX;
1209                         break;
1210                 }
1211
1212                 r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
1213                 break;
1214         }
1215         case BOOK3S_INTERRUPT_ALIGNMENT:
1216         {
1217                 u32 last_inst;
1218                 int emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1219
1220                 if (emul == EMULATE_DONE) {
1221                         u32 dsisr;
1222                         u64 dar;
1223
1224                         dsisr = kvmppc_alignment_dsisr(vcpu, last_inst);
1225                         dar = kvmppc_alignment_dar(vcpu, last_inst);
1226
1227                         kvmppc_set_dsisr(vcpu, dsisr);
1228                         kvmppc_set_dar(vcpu, dar);
1229
1230                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1231                 }
1232                 r = RESUME_GUEST;
1233                 break;
1234         }
1235 #ifdef CONFIG_PPC_BOOK3S_64
1236         case BOOK3S_INTERRUPT_FAC_UNAVAIL:
1237                 kvmppc_handle_fac(vcpu, vcpu->arch.shadow_fscr >> 56);
1238                 r = RESUME_GUEST;
1239                 break;
1240 #endif
1241         case BOOK3S_INTERRUPT_MACHINE_CHECK:
1242                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1243                 r = RESUME_GUEST;
1244                 break;
1245         case BOOK3S_INTERRUPT_TRACE:
1246                 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
1247                         run->exit_reason = KVM_EXIT_DEBUG;
1248                         r = RESUME_HOST;
1249                 } else {
1250                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1251                         r = RESUME_GUEST;
1252                 }
1253                 break;
1254         default:
1255         {
1256                 ulong shadow_srr1 = vcpu->arch.shadow_srr1;
1257                 /* Ugh - bork here! What did we get? */
1258                 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
1259                         exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
1260                 r = RESUME_HOST;
1261                 BUG();
1262                 break;
1263         }
1264         }
1265
1266         if (!(r & RESUME_HOST)) {
1267                 /* To avoid clobbering exit_reason, only check for signals if
1268                  * we aren't already exiting to userspace for some other
1269                  * reason. */
1270
1271                 /*
1272                  * Interrupts could be timers for the guest which we have to
1273                  * inject again, so let's postpone them until we're in the guest
1274                  * and if we really did time things so badly, then we just exit
1275                  * again due to a host external interrupt.
1276                  */
1277                 s = kvmppc_prepare_to_enter(vcpu);
1278                 if (s <= 0)
1279                         r = s;
1280                 else {
1281                         /* interrupts now hard-disabled */
1282                         kvmppc_fix_ee_before_entry();
1283                 }
1284
1285                 kvmppc_handle_lost_ext(vcpu);
1286         }
1287
1288         trace_kvm_book3s_reenter(r, vcpu);
1289
1290         return r;
1291 }
1292
1293 static int kvm_arch_vcpu_ioctl_get_sregs_pr(struct kvm_vcpu *vcpu,
1294                                             struct kvm_sregs *sregs)
1295 {
1296         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1297         int i;
1298
1299         sregs->pvr = vcpu->arch.pvr;
1300
1301         sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
1302         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1303                 for (i = 0; i < 64; i++) {
1304                         sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
1305                         sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
1306                 }
1307         } else {
1308                 for (i = 0; i < 16; i++)
1309                         sregs->u.s.ppc32.sr[i] = kvmppc_get_sr(vcpu, i);
1310
1311                 for (i = 0; i < 8; i++) {
1312                         sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
1313                         sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
1314                 }
1315         }
1316
1317         return 0;
1318 }
1319
1320 static int kvm_arch_vcpu_ioctl_set_sregs_pr(struct kvm_vcpu *vcpu,
1321                                             struct kvm_sregs *sregs)
1322 {
1323         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1324         int i;
1325
1326         kvmppc_set_pvr_pr(vcpu, sregs->pvr);
1327
1328         vcpu3s->sdr1 = sregs->u.s.sdr1;
1329 #ifdef CONFIG_PPC_BOOK3S_64
1330         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1331                 /* Flush all SLB entries */
1332                 vcpu->arch.mmu.slbmte(vcpu, 0, 0);
1333                 vcpu->arch.mmu.slbia(vcpu);
1334
1335                 for (i = 0; i < 64; i++) {
1336                         u64 rb = sregs->u.s.ppc64.slb[i].slbe;
1337                         u64 rs = sregs->u.s.ppc64.slb[i].slbv;
1338
1339                         if (rb & SLB_ESID_V)
1340                                 vcpu->arch.mmu.slbmte(vcpu, rs, rb);
1341                 }
1342         } else
1343 #endif
1344         {
1345                 for (i = 0; i < 16; i++) {
1346                         vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
1347                 }
1348                 for (i = 0; i < 8; i++) {
1349                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
1350                                        (u32)sregs->u.s.ppc32.ibat[i]);
1351                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
1352                                        (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
1353                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
1354                                        (u32)sregs->u.s.ppc32.dbat[i]);
1355                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
1356                                        (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
1357                 }
1358         }
1359
1360         /* Flush the MMU after messing with the segments */
1361         kvmppc_mmu_pte_flush(vcpu, 0, 0);
1362
1363         return 0;
1364 }
1365
1366 static int kvmppc_get_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
1367                                  union kvmppc_one_reg *val)
1368 {
1369         int r = 0;
1370
1371         switch (id) {
1372         case KVM_REG_PPC_DEBUG_INST:
1373                 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1374                 break;
1375         case KVM_REG_PPC_HIOR:
1376                 *val = get_reg_val(id, to_book3s(vcpu)->hior);
1377                 break;
1378         case KVM_REG_PPC_VTB:
1379                 *val = get_reg_val(id, to_book3s(vcpu)->vtb);
1380                 break;
1381         case KVM_REG_PPC_LPCR:
1382         case KVM_REG_PPC_LPCR_64:
1383                 /*
1384                  * We are only interested in the LPCR_ILE bit
1385                  */
1386                 if (vcpu->arch.intr_msr & MSR_LE)
1387                         *val = get_reg_val(id, LPCR_ILE);
1388                 else
1389                         *val = get_reg_val(id, 0);
1390                 break;
1391         default:
1392                 r = -EINVAL;
1393                 break;
1394         }
1395
1396         return r;
1397 }
1398
1399 static void kvmppc_set_lpcr_pr(struct kvm_vcpu *vcpu, u64 new_lpcr)
1400 {
1401         if (new_lpcr & LPCR_ILE)
1402                 vcpu->arch.intr_msr |= MSR_LE;
1403         else
1404                 vcpu->arch.intr_msr &= ~MSR_LE;
1405 }
1406
1407 static int kvmppc_set_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
1408                                  union kvmppc_one_reg *val)
1409 {
1410         int r = 0;
1411
1412         switch (id) {
1413         case KVM_REG_PPC_HIOR:
1414                 to_book3s(vcpu)->hior = set_reg_val(id, *val);
1415                 to_book3s(vcpu)->hior_explicit = true;
1416                 break;
1417         case KVM_REG_PPC_VTB:
1418                 to_book3s(vcpu)->vtb = set_reg_val(id, *val);
1419                 break;
1420         case KVM_REG_PPC_LPCR:
1421         case KVM_REG_PPC_LPCR_64:
1422                 kvmppc_set_lpcr_pr(vcpu, set_reg_val(id, *val));
1423                 break;
1424         default:
1425                 r = -EINVAL;
1426                 break;
1427         }
1428
1429         return r;
1430 }
1431
1432 static struct kvm_vcpu *kvmppc_core_vcpu_create_pr(struct kvm *kvm,
1433                                                    unsigned int id)
1434 {
1435         struct kvmppc_vcpu_book3s *vcpu_book3s;
1436         struct kvm_vcpu *vcpu;
1437         int err = -ENOMEM;
1438         unsigned long p;
1439
1440         vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
1441         if (!vcpu)
1442                 goto out;
1443
1444         vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
1445         if (!vcpu_book3s)
1446                 goto free_vcpu;
1447         vcpu->arch.book3s = vcpu_book3s;
1448
1449 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1450         vcpu->arch.shadow_vcpu =
1451                 kzalloc(sizeof(*vcpu->arch.shadow_vcpu), GFP_KERNEL);
1452         if (!vcpu->arch.shadow_vcpu)
1453                 goto free_vcpu3s;
1454 #endif
1455
1456         err = kvm_vcpu_init(vcpu, kvm, id);
1457         if (err)
1458                 goto free_shadow_vcpu;
1459
1460         err = -ENOMEM;
1461         p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
1462         if (!p)
1463                 goto uninit_vcpu;
1464         vcpu->arch.shared = (void *)p;
1465 #ifdef CONFIG_PPC_BOOK3S_64
1466         /* Always start the shared struct in native endian mode */
1467 #ifdef __BIG_ENDIAN__
1468         vcpu->arch.shared_big_endian = true;
1469 #else
1470         vcpu->arch.shared_big_endian = false;
1471 #endif
1472
1473         /*
1474          * Default to the same as the host if we're on sufficiently
1475          * recent machine that we have 1TB segments;
1476          * otherwise default to PPC970FX.
1477          */
1478         vcpu->arch.pvr = 0x3C0301;
1479         if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
1480                 vcpu->arch.pvr = mfspr(SPRN_PVR);
1481         vcpu->arch.intr_msr = MSR_SF;
1482 #else
1483         /* default to book3s_32 (750) */
1484         vcpu->arch.pvr = 0x84202;
1485 #endif
1486         kvmppc_set_pvr_pr(vcpu, vcpu->arch.pvr);
1487         vcpu->arch.slb_nr = 64;
1488
1489         vcpu->arch.shadow_msr = MSR_USER64 & ~MSR_LE;
1490
1491         err = kvmppc_mmu_init(vcpu);
1492         if (err < 0)
1493                 goto uninit_vcpu;
1494
1495         return vcpu;
1496
1497 uninit_vcpu:
1498         kvm_vcpu_uninit(vcpu);
1499 free_shadow_vcpu:
1500 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1501         kfree(vcpu->arch.shadow_vcpu);
1502 free_vcpu3s:
1503 #endif
1504         vfree(vcpu_book3s);
1505 free_vcpu:
1506         kmem_cache_free(kvm_vcpu_cache, vcpu);
1507 out:
1508         return ERR_PTR(err);
1509 }
1510
1511 static void kvmppc_core_vcpu_free_pr(struct kvm_vcpu *vcpu)
1512 {
1513         struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1514
1515         free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
1516         kvm_vcpu_uninit(vcpu);
1517 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1518         kfree(vcpu->arch.shadow_vcpu);
1519 #endif
1520         vfree(vcpu_book3s);
1521         kmem_cache_free(kvm_vcpu_cache, vcpu);
1522 }
1523
1524 static int kvmppc_vcpu_run_pr(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1525 {
1526         int ret;
1527 #ifdef CONFIG_ALTIVEC
1528         unsigned long uninitialized_var(vrsave);
1529 #endif
1530
1531         /* Check if we can run the vcpu at all */
1532         if (!vcpu->arch.sane) {
1533                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1534                 ret = -EINVAL;
1535                 goto out;
1536         }
1537
1538         kvmppc_setup_debug(vcpu);
1539
1540         /*
1541          * Interrupts could be timers for the guest which we have to inject
1542          * again, so let's postpone them until we're in the guest and if we
1543          * really did time things so badly, then we just exit again due to
1544          * a host external interrupt.
1545          */
1546         ret = kvmppc_prepare_to_enter(vcpu);
1547         if (ret <= 0)
1548                 goto out;
1549         /* interrupts now hard-disabled */
1550
1551         /* Save FPU, Altivec and VSX state */
1552         giveup_all(current);
1553
1554         /* Preload FPU if it's enabled */
1555         if (kvmppc_get_msr(vcpu) & MSR_FP)
1556                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1557
1558         kvmppc_fix_ee_before_entry();
1559
1560         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
1561
1562         kvmppc_clear_debug(vcpu);
1563
1564         /* No need for guest_exit. It's done in handle_exit.
1565            We also get here with interrupts enabled. */
1566
1567         /* Make sure we save the guest FPU/Altivec/VSX state */
1568         kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
1569
1570         /* Make sure we save the guest TAR/EBB/DSCR state */
1571         kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
1572
1573 out:
1574         vcpu->mode = OUTSIDE_GUEST_MODE;
1575         return ret;
1576 }
1577
1578 /*
1579  * Get (and clear) the dirty memory log for a memory slot.
1580  */
1581 static int kvm_vm_ioctl_get_dirty_log_pr(struct kvm *kvm,
1582                                          struct kvm_dirty_log *log)
1583 {
1584         struct kvm_memslots *slots;
1585         struct kvm_memory_slot *memslot;
1586         struct kvm_vcpu *vcpu;
1587         ulong ga, ga_end;
1588         int is_dirty = 0;
1589         int r;
1590         unsigned long n;
1591
1592         mutex_lock(&kvm->slots_lock);
1593
1594         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1595         if (r)
1596                 goto out;
1597
1598         /* If nothing is dirty, don't bother messing with page tables. */
1599         if (is_dirty) {
1600                 slots = kvm_memslots(kvm);
1601                 memslot = id_to_memslot(slots, log->slot);
1602
1603                 ga = memslot->base_gfn << PAGE_SHIFT;
1604                 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1605
1606                 kvm_for_each_vcpu(n, vcpu, kvm)
1607                         kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1608
1609                 n = kvm_dirty_bitmap_bytes(memslot);
1610                 memset(memslot->dirty_bitmap, 0, n);
1611         }
1612
1613         r = 0;
1614 out:
1615         mutex_unlock(&kvm->slots_lock);
1616         return r;
1617 }
1618
1619 static void kvmppc_core_flush_memslot_pr(struct kvm *kvm,
1620                                          struct kvm_memory_slot *memslot)
1621 {
1622         return;
1623 }
1624
1625 static int kvmppc_core_prepare_memory_region_pr(struct kvm *kvm,
1626                                         struct kvm_memory_slot *memslot,
1627                                         const struct kvm_userspace_memory_region *mem)
1628 {
1629         return 0;
1630 }
1631
1632 static void kvmppc_core_commit_memory_region_pr(struct kvm *kvm,
1633                                 const struct kvm_userspace_memory_region *mem,
1634                                 const struct kvm_memory_slot *old,
1635                                 const struct kvm_memory_slot *new)
1636 {
1637         return;
1638 }
1639
1640 static void kvmppc_core_free_memslot_pr(struct kvm_memory_slot *free,
1641                                         struct kvm_memory_slot *dont)
1642 {
1643         return;
1644 }
1645
1646 static int kvmppc_core_create_memslot_pr(struct kvm_memory_slot *slot,
1647                                          unsigned long npages)
1648 {
1649         return 0;
1650 }
1651
1652
1653 #ifdef CONFIG_PPC64
1654 static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
1655                                          struct kvm_ppc_smmu_info *info)
1656 {
1657         long int i;
1658         struct kvm_vcpu *vcpu;
1659
1660         info->flags = 0;
1661
1662         /* SLB is always 64 entries */
1663         info->slb_size = 64;
1664
1665         /* Standard 4k base page size segment */
1666         info->sps[0].page_shift = 12;
1667         info->sps[0].slb_enc = 0;
1668         info->sps[0].enc[0].page_shift = 12;
1669         info->sps[0].enc[0].pte_enc = 0;
1670
1671         /*
1672          * 64k large page size.
1673          * We only want to put this in if the CPUs we're emulating
1674          * support it, but unfortunately we don't have a vcpu easily
1675          * to hand here to test.  Just pick the first vcpu, and if
1676          * that doesn't exist yet, report the minimum capability,
1677          * i.e., no 64k pages.
1678          * 1T segment support goes along with 64k pages.
1679          */
1680         i = 1;
1681         vcpu = kvm_get_vcpu(kvm, 0);
1682         if (vcpu && (vcpu->arch.hflags & BOOK3S_HFLAG_MULTI_PGSIZE)) {
1683                 info->flags = KVM_PPC_1T_SEGMENTS;
1684                 info->sps[i].page_shift = 16;
1685                 info->sps[i].slb_enc = SLB_VSID_L | SLB_VSID_LP_01;
1686                 info->sps[i].enc[0].page_shift = 16;
1687                 info->sps[i].enc[0].pte_enc = 1;
1688                 ++i;
1689         }
1690
1691         /* Standard 16M large page size segment */
1692         info->sps[i].page_shift = 24;
1693         info->sps[i].slb_enc = SLB_VSID_L;
1694         info->sps[i].enc[0].page_shift = 24;
1695         info->sps[i].enc[0].pte_enc = 0;
1696
1697         return 0;
1698 }
1699 #else
1700 static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
1701                                          struct kvm_ppc_smmu_info *info)
1702 {
1703         /* We should not get called */
1704         BUG();
1705 }
1706 #endif /* CONFIG_PPC64 */
1707
1708 static unsigned int kvm_global_user_count = 0;
1709 static DEFINE_SPINLOCK(kvm_global_user_count_lock);
1710
1711 static int kvmppc_core_init_vm_pr(struct kvm *kvm)
1712 {
1713         mutex_init(&kvm->arch.hpt_mutex);
1714
1715 #ifdef CONFIG_PPC_BOOK3S_64
1716         /* Start out with the default set of hcalls enabled */
1717         kvmppc_pr_init_default_hcalls(kvm);
1718 #endif
1719
1720         if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
1721                 spin_lock(&kvm_global_user_count_lock);
1722                 if (++kvm_global_user_count == 1)
1723                         pseries_disable_reloc_on_exc();
1724                 spin_unlock(&kvm_global_user_count_lock);
1725         }
1726         return 0;
1727 }
1728
1729 static void kvmppc_core_destroy_vm_pr(struct kvm *kvm)
1730 {
1731 #ifdef CONFIG_PPC64
1732         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
1733 #endif
1734
1735         if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
1736                 spin_lock(&kvm_global_user_count_lock);
1737                 BUG_ON(kvm_global_user_count == 0);
1738                 if (--kvm_global_user_count == 0)
1739                         pseries_enable_reloc_on_exc();
1740                 spin_unlock(&kvm_global_user_count_lock);
1741         }
1742 }
1743
1744 static int kvmppc_core_check_processor_compat_pr(void)
1745 {
1746         /*
1747          * Disable KVM for Power9 untill the required bits merged.
1748          */
1749         if (cpu_has_feature(CPU_FTR_ARCH_300))
1750                 return -EIO;
1751         return 0;
1752 }
1753
1754 static long kvm_arch_vm_ioctl_pr(struct file *filp,
1755                                  unsigned int ioctl, unsigned long arg)
1756 {
1757         return -ENOTTY;
1758 }
1759
1760 static struct kvmppc_ops kvm_ops_pr = {
1761         .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_pr,
1762         .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_pr,
1763         .get_one_reg = kvmppc_get_one_reg_pr,
1764         .set_one_reg = kvmppc_set_one_reg_pr,
1765         .vcpu_load   = kvmppc_core_vcpu_load_pr,
1766         .vcpu_put    = kvmppc_core_vcpu_put_pr,
1767         .set_msr     = kvmppc_set_msr_pr,
1768         .vcpu_run    = kvmppc_vcpu_run_pr,
1769         .vcpu_create = kvmppc_core_vcpu_create_pr,
1770         .vcpu_free   = kvmppc_core_vcpu_free_pr,
1771         .check_requests = kvmppc_core_check_requests_pr,
1772         .get_dirty_log = kvm_vm_ioctl_get_dirty_log_pr,
1773         .flush_memslot = kvmppc_core_flush_memslot_pr,
1774         .prepare_memory_region = kvmppc_core_prepare_memory_region_pr,
1775         .commit_memory_region = kvmppc_core_commit_memory_region_pr,
1776         .unmap_hva = kvm_unmap_hva_pr,
1777         .unmap_hva_range = kvm_unmap_hva_range_pr,
1778         .age_hva  = kvm_age_hva_pr,
1779         .test_age_hva = kvm_test_age_hva_pr,
1780         .set_spte_hva = kvm_set_spte_hva_pr,
1781         .mmu_destroy  = kvmppc_mmu_destroy_pr,
1782         .free_memslot = kvmppc_core_free_memslot_pr,
1783         .create_memslot = kvmppc_core_create_memslot_pr,
1784         .init_vm = kvmppc_core_init_vm_pr,
1785         .destroy_vm = kvmppc_core_destroy_vm_pr,
1786         .get_smmu_info = kvm_vm_ioctl_get_smmu_info_pr,
1787         .emulate_op = kvmppc_core_emulate_op_pr,
1788         .emulate_mtspr = kvmppc_core_emulate_mtspr_pr,
1789         .emulate_mfspr = kvmppc_core_emulate_mfspr_pr,
1790         .fast_vcpu_kick = kvm_vcpu_kick,
1791         .arch_vm_ioctl  = kvm_arch_vm_ioctl_pr,
1792 #ifdef CONFIG_PPC_BOOK3S_64
1793         .hcall_implemented = kvmppc_hcall_impl_pr,
1794 #endif
1795 };
1796
1797
1798 int kvmppc_book3s_init_pr(void)
1799 {
1800         int r;
1801
1802         r = kvmppc_core_check_processor_compat_pr();
1803         if (r < 0)
1804                 return r;
1805
1806         kvm_ops_pr.owner = THIS_MODULE;
1807         kvmppc_pr_ops = &kvm_ops_pr;
1808
1809         r = kvmppc_mmu_hpte_sysinit();
1810         return r;
1811 }
1812
1813 void kvmppc_book3s_exit_pr(void)
1814 {
1815         kvmppc_pr_ops = NULL;
1816         kvmppc_mmu_hpte_sysexit();
1817 }
1818
1819 /*
1820  * We only support separate modules for book3s 64
1821  */
1822 #ifdef CONFIG_PPC_BOOK3S_64
1823
1824 module_init(kvmppc_book3s_init_pr);
1825 module_exit(kvmppc_book3s_exit_pr);
1826
1827 MODULE_LICENSE("GPL");
1828 MODULE_ALIAS_MISCDEV(KVM_MINOR);
1829 MODULE_ALIAS("devname:kvm");
1830 #endif