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 <linux/gfp.h>
  38 #include <linux/sched.h>
  39 #include <linux/vmalloc.h>
  40 #include <linux/highmem.h>
  41
  42 #include "trace.h"
  43
  44 /* #define EXIT_DEBUG */
  45 /* #define DEBUG_EXT */
  46
  47 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
  48                              ulong msr);
  49
  50 /* Some compatibility defines */
  51 #ifdef CONFIG_PPC_BOOK3S_32
  52 #define MSR_USER32 MSR_USER
  53 #define MSR_USER64 MSR_USER
  54 #define HW_PAGE_SIZE PAGE_SIZE
  55 #endif
  56
  57 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
  58 {
  59 #ifdef CONFIG_PPC_BOOK3S_64
  60         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
  61         memcpy(svcpu->slb, to_book3s(vcpu)->slb_shadow, sizeof(svcpu->slb));
  62         memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu,
  63                sizeof(get_paca()->shadow_vcpu));
  64         svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
  65         svcpu_put(svcpu);
  66 #endif
  67         vcpu->cpu = smp_processor_id();
  68 #ifdef CONFIG_PPC_BOOK3S_32
  69         current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu;
  70 #endif
  71 }
  72
  73 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
  74 {
  75 #ifdef CONFIG_PPC_BOOK3S_64
  76         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
  77         memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
  78         memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
  79                sizeof(get_paca()->shadow_vcpu));
  80         to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
  81         svcpu_put(svcpu);
  82 #endif
  83
  84         kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
  85         vcpu->cpu = -1;
  86 }
  87
  88 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
  89 {
  90         int r = 1; /* Indicate we want to get back into the guest */
  91
  92         /* We misuse TLB_FLUSH to indicate that we want to clear
  93            all shadow cache entries */
  94         if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
  95                 kvmppc_mmu_pte_flush(vcpu, 0, 0);
  96
  97         return r;
  98 }
  99
 100 /************* MMU Notifiers *************/
 101
 102 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
 103 {
 104         trace_kvm_unmap_hva(hva);
 105
 106         /*
 107          * Flush all shadow tlb entries everywhere. This is slow, but
 108          * we are 100% sure that we catch the to be unmapped page
 109          */
 110         kvm_flush_remote_tlbs(kvm);
 111
 112         return 0;
 113 }
 114
 115 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 116 {
 117         /* kvm_unmap_hva flushes everything anyways */
 118         kvm_unmap_hva(kvm, start);
 119
 120         return 0;
 121 }
 122
 123 int kvm_age_hva(struct kvm *kvm, unsigned long hva)
 124 {
 125         /* XXX could be more clever ;) */
 126         return 0;
 127 }
 128
 129 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 130 {
 131         /* XXX could be more clever ;) */
 132         return 0;
 133 }
 134
 135 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 136 {
 137         /* The page will get remapped properly on its next fault */
 138         kvm_unmap_hva(kvm, hva);
 139 }
 140
 141 /*****************************************/
 142
 143 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
 144 {
 145         ulong smsr = vcpu->arch.shared->msr;
 146
 147         /* Guest MSR values */
 148         smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE;
 149         /* Process MSR values */
 150         smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
 151         /* External providers the guest reserved */
 152         smsr |= (vcpu->arch.shared->msr & vcpu->arch.guest_owned_ext);
 153         /* 64-bit Process MSR values */
 154 #ifdef CONFIG_PPC_BOOK3S_64
 155         smsr |= MSR_ISF | MSR_HV;
 156 #endif
 157         vcpu->arch.shadow_msr = smsr;
 158 }
 159
 160 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 161 {
 162         ulong old_msr = vcpu->arch.shared->msr;
 163
 164 #ifdef EXIT_DEBUG
 165         printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
 166 #endif
 167
 168         msr &= to_book3s(vcpu)->msr_mask;
 169         vcpu->arch.shared->msr = msr;
 170         kvmppc_recalc_shadow_msr(vcpu);
 171
 172         if (msr & MSR_POW) {
 173                 if (!vcpu->arch.pending_exceptions) {
 174                         kvm_vcpu_block(vcpu);
 175                         clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 176                         vcpu->stat.halt_wakeup++;
 177
 178                         /* Unset POW bit after we woke up */
 179                         msr &= ~MSR_POW;
 180                         vcpu->arch.shared->msr = msr;
 181                 }
 182         }
 183
 184         if ((vcpu->arch.shared->msr & (MSR_PR|MSR_IR|MSR_DR)) !=
 185                    (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
 186                 kvmppc_mmu_flush_segments(vcpu);
 187                 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
 188
 189                 /* Preload magic page segment when in kernel mode */
 190                 if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
 191                         struct kvm_vcpu_arch *a = &vcpu->arch;
 192
 193                         if (msr & MSR_DR)
 194                                 kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
 195                         else
 196                                 kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
 197                 }
 198         }
 199
 200         /*
 201          * When switching from 32 to 64-bit, we may have a stale 32-bit
 202          * magic page around, we need to flush it. Typically 32-bit magic
 203          * page will be instanciated when calling into RTAS. Note: We
 204          * assume that such transition only happens while in kernel mode,
 205          * ie, we never transition from user 32-bit to kernel 64-bit with
 206          * a 32-bit magic page around.
 207          */
 208         if (vcpu->arch.magic_page_pa &&
 209             !(old_msr & MSR_PR) && !(old_msr & MSR_SF) && (msr & MSR_SF)) {
 210                 /* going from RTAS to normal kernel code */
 211                 kvmppc_mmu_pte_flush(vcpu, (uint32_t)vcpu->arch.magic_page_pa,
 212                                      ~0xFFFUL);
 213         }
 214
 215         /* Preload FPU if it's enabled */
 216         if (vcpu->arch.shared->msr & MSR_FP)
 217                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
 218 }
 219
 220 void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
 221 {
 222         u32 host_pvr;
 223
 224         vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
 225         vcpu->arch.pvr = pvr;
 226 #ifdef CONFIG_PPC_BOOK3S_64
 227         if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
 228                 kvmppc_mmu_book3s_64_init(vcpu);
 229                 if (!to_book3s(vcpu)->hior_explicit)
 230                         to_book3s(vcpu)->hior = 0xfff00000;
 231                 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
 232                 vcpu->arch.cpu_type = KVM_CPU_3S_64;
 233         } else
 234 #endif
 235         {
 236                 kvmppc_mmu_book3s_32_init(vcpu);
 237                 if (!to_book3s(vcpu)->hior_explicit)
 238                         to_book3s(vcpu)->hior = 0;
 239                 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
 240                 vcpu->arch.cpu_type = KVM_CPU_3S_32;
 241         }
 242
 243         kvmppc_sanity_check(vcpu);
 244
 245         /* If we are in hypervisor level on 970, we can tell the CPU to
 246          * treat DCBZ as 32 bytes store */
 247         vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
 248         if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
 249             !strcmp(cur_cpu_spec->platform, "ppc970"))
 250                 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 251
 252         /* Cell performs badly if MSR_FEx are set. So let's hope nobody
 253            really needs them in a VM on Cell and force disable them. */
 254         if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
 255                 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
 256
 257 #ifdef CONFIG_PPC_BOOK3S_32
 258         /* 32 bit Book3S always has 32 byte dcbz */
 259         vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 260 #endif
 261
 262         /* On some CPUs we can execute paired single operations natively */
 263         asm ( "mfpvr %0" : "=r"(host_pvr));
 264         switch (host_pvr) {
 265         case 0x00080200:        /* lonestar 2.0 */
 266         case 0x00088202:        /* lonestar 2.2 */
 267         case 0x70000100:        /* gekko 1.0 */
 268         case 0x00080100:        /* gekko 2.0 */
 269         case 0x00083203:        /* gekko 2.3a */
 270         case 0x00083213:        /* gekko 2.3b */
 271         case 0x00083204:        /* gekko 2.4 */
 272         case 0x00083214:        /* gekko 2.4e (8SE) - retail HW2 */
 273         case 0x00087200:        /* broadway */
 274                 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
 275                 /* Enable HID2.PSE - in case we need it later */
 276                 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
 277         }
 278 }
 279
 280 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
 281  * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
 282  * emulate 32 bytes dcbz length.
 283  *
 284  * The Book3s_64 inventors also realized this case and implemented a special bit
 285  * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
 286  *
 287  * My approach here is to patch the dcbz instruction on executing pages.
 288  */
 289 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
 290 {
 291         struct page *hpage;
 292         u64 hpage_offset;
 293         u32 *page;
 294         int i;
 295
 296         hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 297         if (is_error_page(hpage))
 298                 return;
 299
 300         hpage_offset = pte->raddr & ~PAGE_MASK;
 301         hpage_offset &= ~0xFFFULL;
 302         hpage_offset /= 4;
 303
 304         get_page(hpage);
 305         page = kmap_atomic(hpage);
 306
 307         /* patch dcbz into reserved instruction, so we trap */
 308         for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
 309                 if ((page[i] & 0xff0007ff) == INS_DCBZ)
 310                         page[i] &= 0xfffffff7;
 311
 312         kunmap_atomic(page);
 313         put_page(hpage);
 314 }
 315
 316 static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
 317 {
 318         ulong mp_pa = vcpu->arch.magic_page_pa;
 319
 320         if (!(vcpu->arch.shared->msr & MSR_SF))
 321                 mp_pa = (uint32_t)mp_pa;
 322
 323         if (unlikely(mp_pa) &&
 324             unlikely((mp_pa & KVM_PAM) >> PAGE_SHIFT == gfn)) {
 325                 return 1;
 326         }
 327
 328         return kvm_is_visible_gfn(vcpu->kvm, gfn);
 329 }
 330
 331 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
 332                             ulong eaddr, int vec)
 333 {
 334         bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
 335         int r = RESUME_GUEST;
 336         int relocated;
 337         int page_found = 0;
 338         struct kvmppc_pte pte;
 339         bool is_mmio = false;
 340         bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
 341         bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
 342         u64 vsid;
 343
 344         relocated = data ? dr : ir;
 345
 346         /* Resolve real address if translation turned on */
 347         if (relocated) {
 348                 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
 349         } else {
 350                 pte.may_execute = true;
 351                 pte.may_read = true;
 352                 pte.may_write = true;
 353                 pte.raddr = eaddr & KVM_PAM;
 354                 pte.eaddr = eaddr;
 355                 pte.vpage = eaddr >> 12;
 356         }
 357
 358         switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
 359         case 0:
 360                 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
 361                 break;
 362         case MSR_DR:
 363         case MSR_IR:
 364                 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
 365
 366                 if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
 367                         pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
 368                 else
 369                         pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
 370                 pte.vpage |= vsid;
 371
 372                 if (vsid == -1)
 373                         page_found = -EINVAL;
 374                 break;
 375         }
 376
 377         if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 378            (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
 379                 /*
 380                  * If we do the dcbz hack, we have to NX on every execution,
 381                  * so we can patch the executing code. This renders our guest
 382                  * NX-less.
 383                  */
 384                 pte.may_execute = !data;
 385         }
 386
 387         if (page_found == -ENOENT) {
 388                 /* Page not found in guest PTE entries */
 389                 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 390                 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 391                 vcpu->arch.shared->dsisr = svcpu->fault_dsisr;
 392                 vcpu->arch.shared->msr |=
 393                         (svcpu->shadow_srr1 & 0x00000000f8000000ULL);
 394                 svcpu_put(svcpu);
 395                 kvmppc_book3s_queue_irqprio(vcpu, vec);
 396         } else if (page_found == -EPERM) {
 397                 /* Storage protection */
 398                 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 399                 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 400                 vcpu->arch.shared->dsisr = svcpu->fault_dsisr & ~DSISR_NOHPTE;
 401                 vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
 402                 vcpu->arch.shared->msr |=
 403                         svcpu->shadow_srr1 & 0x00000000f8000000ULL;
 404                 svcpu_put(svcpu);
 405                 kvmppc_book3s_queue_irqprio(vcpu, vec);
 406         } else if (page_found == -EINVAL) {
 407                 /* Page not found in guest SLB */
 408                 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 409                 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
 410         } else if (!is_mmio &&
 411                    kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
 412                 /* The guest's PTE is not mapped yet. Map on the host */
 413                 kvmppc_mmu_map_page(vcpu, &pte);
 414                 if (data)
 415                         vcpu->stat.sp_storage++;
 416                 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 417                         (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
 418                         kvmppc_patch_dcbz(vcpu, &pte);
 419         } else {
 420                 /* MMIO */
 421                 vcpu->stat.mmio_exits++;
 422                 vcpu->arch.paddr_accessed = pte.raddr;
 423                 vcpu->arch.vaddr_accessed = pte.eaddr;
 424                 r = kvmppc_emulate_mmio(run, vcpu);
 425                 if ( r == RESUME_HOST_NV )
 426                         r = RESUME_HOST;
 427         }
 428
 429         return r;
 430 }
 431
 432 static inline int get_fpr_index(int i)
 433 {
 434         return i * TS_FPRWIDTH;
 435 }
 436
 437 /* Give up external provider (FPU, Altivec, VSX) */
 438 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
 439 {
 440         struct thread_struct *t = &current->thread;
 441         u64 *vcpu_fpr = vcpu->arch.fpr;
 442 #ifdef CONFIG_VSX
 443         u64 *vcpu_vsx = vcpu->arch.vsr;
 444 #endif
 445         u64 *thread_fpr = (u64*)t->fpr;
 446         int i;
 447
 448         /*
 449          * VSX instructions can access FP and vector registers, so if
 450          * we are giving up VSX, make sure we give up FP and VMX as well.
 451          */
 452         if (msr & MSR_VSX)
 453                 msr |= MSR_FP | MSR_VEC;
 454
 455         msr &= vcpu->arch.guest_owned_ext;
 456         if (!msr)
 457                 return;
 458
 459 #ifdef DEBUG_EXT
 460         printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
 461 #endif
 462
 463         if (msr & MSR_FP) {
 464                 /*
 465                  * Note that on CPUs with VSX, giveup_fpu stores
 466                  * both the traditional FP registers and the added VSX
 467                  * registers into thread.fpr[].
 468                  */
 469                 giveup_fpu(current);
 470                 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
 471                         vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];
 472
 473                 vcpu->arch.fpscr = t->fpscr.val;
 474
 475 #ifdef CONFIG_VSX
 476                 if (cpu_has_feature(CPU_FTR_VSX))
 477                         for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr) / 2; i++)
 478                                 vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1];
 479 #endif
 480         }
 481
 482 #ifdef CONFIG_ALTIVEC
 483         if (msr & MSR_VEC) {
 484                 giveup_altivec(current);
 485                 memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
 486                 vcpu->arch.vscr = t->vscr;
 487         }
 488 #endif
 489
 490         vcpu->arch.guest_owned_ext &= ~(msr | MSR_VSX);
 491         kvmppc_recalc_shadow_msr(vcpu);
 492 }
 493
 494 static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
 495 {
 496         ulong srr0 = kvmppc_get_pc(vcpu);
 497         u32 last_inst = kvmppc_get_last_inst(vcpu);
 498         int ret;
 499
 500         ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
 501         if (ret == -ENOENT) {
 502                 ulong msr = vcpu->arch.shared->msr;
 503
 504                 msr = kvmppc_set_field(msr, 33, 33, 1);
 505                 msr = kvmppc_set_field(msr, 34, 36, 0);
 506                 vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
 507                 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
 508                 return EMULATE_AGAIN;
 509         }
 510
 511         return EMULATE_DONE;
 512 }
 513
 514 static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
 515 {
 516
 517         /* Need to do paired single emulation? */
 518         if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
 519                 return EMULATE_DONE;
 520
 521         /* Read out the instruction */
 522         if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
 523                 /* Need to emulate */
 524                 return EMULATE_FAIL;
 525
 526         return EMULATE_AGAIN;
 527 }
 528
 529 /* Handle external providers (FPU, Altivec, VSX) */
 530 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
 531                              ulong msr)
 532 {
 533         struct thread_struct *t = &current->thread;
 534         u64 *vcpu_fpr = vcpu->arch.fpr;
 535 #ifdef CONFIG_VSX
 536         u64 *vcpu_vsx = vcpu->arch.vsr;
 537 #endif
 538         u64 *thread_fpr = (u64*)t->fpr;
 539         int i;
 540
 541         /* When we have paired singles, we emulate in software */
 542         if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
 543                 return RESUME_GUEST;
 544
 545         if (!(vcpu->arch.shared->msr & msr)) {
 546                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 547                 return RESUME_GUEST;
 548         }
 549
 550         if (msr == MSR_VSX) {
 551                 /* No VSX?  Give an illegal instruction interrupt */
 552 #ifdef CONFIG_VSX
 553                 if (!cpu_has_feature(CPU_FTR_VSX))
 554 #endif
 555                 {
 556                         kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
 557                         return RESUME_GUEST;
 558                 }
 559
 560                 /*
 561                  * We have to load up all the FP and VMX registers before
 562                  * we can let the guest use VSX instructions.
 563                  */
 564                 msr = MSR_FP | MSR_VEC | MSR_VSX;
 565         }
 566
 567         /* See if we already own all the ext(s) needed */
 568         msr &= ~vcpu->arch.guest_owned_ext;
 569         if (!msr)
 570                 return RESUME_GUEST;
 571
 572 #ifdef DEBUG_EXT
 573         printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
 574 #endif
 575
 576         current->thread.regs->msr |= msr;
 577
 578         if (msr & MSR_FP) {
 579                 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
 580                         thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];
 581 #ifdef CONFIG_VSX
 582                 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr) / 2; i++)
 583                         thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
 584 #endif
 585                 t->fpscr.val = vcpu->arch.fpscr;
 586                 t->fpexc_mode = 0;
 587                 kvmppc_load_up_fpu();
 588         }
 589
 590         if (msr & MSR_VEC) {
 591 #ifdef CONFIG_ALTIVEC
 592                 memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
 593                 t->vscr = vcpu->arch.vscr;
 594                 t->vrsave = -1;
 595                 kvmppc_load_up_altivec();
 596 #endif
 597         }
 598
 599         vcpu->arch.guest_owned_ext |= msr;
 600         kvmppc_recalc_shadow_msr(vcpu);
 601
 602         return RESUME_GUEST;
 603 }
 604
 605 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 606                        unsigned int exit_nr)
 607 {
 608         int r = RESUME_HOST;
 609         int s;
 610
 611         vcpu->stat.sum_exits++;
 612
 613         run->exit_reason = KVM_EXIT_UNKNOWN;
 614         run->ready_for_interrupt_injection = 1;
 615
 616         /* We get here with MSR.EE=1 */
 617
 618         trace_kvm_exit(exit_nr, vcpu);
 619         kvm_guest_exit();
 620
 621         switch (exit_nr) {
 622         case BOOK3S_INTERRUPT_INST_STORAGE:
 623         {
 624                 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 625                 ulong shadow_srr1 = svcpu->shadow_srr1;
 626                 vcpu->stat.pf_instruc++;
 627
 628 #ifdef CONFIG_PPC_BOOK3S_32
 629                 /* We set segments as unused segments when invalidating them. So
 630                  * treat the respective fault as segment fault. */
 631                 if (svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT] == SR_INVALID) {
 632                         kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
 633                         r = RESUME_GUEST;
 634                         svcpu_put(svcpu);
 635                         break;
 636                 }
 637 #endif
 638                 svcpu_put(svcpu);
 639
 640                 /* only care about PTEG not found errors, but leave NX alone */
 641                 if (shadow_srr1 & 0x40000000) {
 642                         r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
 643                         vcpu->stat.sp_instruc++;
 644                 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 645                           (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
 646                         /*
 647                          * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
 648                          *     so we can't use the NX bit inside the guest. Let's cross our fingers,
 649                          *     that no guest that needs the dcbz hack does NX.
 650                          */
 651                         kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
 652                         r = RESUME_GUEST;
 653                 } else {
 654                         vcpu->arch.shared->msr |= shadow_srr1 & 0x58000000;
 655                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 656                         r = RESUME_GUEST;
 657                 }
 658                 break;
 659         }
 660         case BOOK3S_INTERRUPT_DATA_STORAGE:
 661         {
 662                 ulong dar = kvmppc_get_fault_dar(vcpu);
 663                 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 664                 u32 fault_dsisr = svcpu->fault_dsisr;
 665                 vcpu->stat.pf_storage++;
 666
 667 #ifdef CONFIG_PPC_BOOK3S_32
 668                 /* We set segments as unused segments when invalidating them. So
 669                  * treat the respective fault as segment fault. */
 670                 if ((svcpu->sr[dar >> SID_SHIFT]) == SR_INVALID) {
 671                         kvmppc_mmu_map_segment(vcpu, dar);
 672                         r = RESUME_GUEST;
 673                         svcpu_put(svcpu);
 674                         break;
 675                 }
 676 #endif
 677                 svcpu_put(svcpu);
 678
 679                 /* The only case we need to handle is missing shadow PTEs */
 680                 if (fault_dsisr & DSISR_NOHPTE) {
 681                         r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
 682                 } else {
 683                         vcpu->arch.shared->dar = dar;
 684                         vcpu->arch.shared->dsisr = fault_dsisr;
 685                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 686                         r = RESUME_GUEST;
 687                 }
 688                 break;
 689         }
 690         case BOOK3S_INTERRUPT_DATA_SEGMENT:
 691                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
 692                         vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
 693                         kvmppc_book3s_queue_irqprio(vcpu,
 694                                 BOOK3S_INTERRUPT_DATA_SEGMENT);
 695                 }
 696                 r = RESUME_GUEST;
 697                 break;
 698         case BOOK3S_INTERRUPT_INST_SEGMENT:
 699                 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
 700                         kvmppc_book3s_queue_irqprio(vcpu,
 701                                 BOOK3S_INTERRUPT_INST_SEGMENT);
 702                 }
 703                 r = RESUME_GUEST;
 704                 break;
 705         /* We're good on these - the host merely wanted to get our attention */
 706         case BOOK3S_INTERRUPT_DECREMENTER:
 707         case BOOK3S_INTERRUPT_HV_DECREMENTER:
 708                 vcpu->stat.dec_exits++;
 709                 r = RESUME_GUEST;
 710                 break;
 711         case BOOK3S_INTERRUPT_EXTERNAL:
 712         case BOOK3S_INTERRUPT_EXTERNAL_LEVEL:
 713         case BOOK3S_INTERRUPT_EXTERNAL_HV:
 714                 vcpu->stat.ext_intr_exits++;
 715                 r = RESUME_GUEST;
 716                 break;
 717         case BOOK3S_INTERRUPT_PERFMON:
 718                 r = RESUME_GUEST;
 719                 break;
 720         case BOOK3S_INTERRUPT_PROGRAM:
 721         case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
 722         {
 723                 enum emulation_result er;
 724                 struct kvmppc_book3s_shadow_vcpu *svcpu;
 725                 ulong flags;
 726
 727 program_interrupt:
 728                 svcpu = svcpu_get(vcpu);
 729                 flags = svcpu->shadow_srr1 & 0x1f0000ull;
 730                 svcpu_put(svcpu);
 731
 732                 if (vcpu->arch.shared->msr & MSR_PR) {
 733 #ifdef EXIT_DEBUG
 734                         printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
 735 #endif
 736                         if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
 737                             (INS_DCBZ & 0xfffffff7)) {
 738                                 kvmppc_core_queue_program(vcpu, flags);
 739                                 r = RESUME_GUEST;
 740                                 break;
 741                         }
 742                 }
 743
 744                 vcpu->stat.emulated_inst_exits++;
 745                 er = kvmppc_emulate_instruction(run, vcpu);
 746                 switch (er) {
 747                 case EMULATE_DONE:
 748                         r = RESUME_GUEST_NV;
 749                         break;
 750                 case EMULATE_AGAIN:
 751                         r = RESUME_GUEST;
 752                         break;
 753                 case EMULATE_FAIL:
 754                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 755                                __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
 756                         kvmppc_core_queue_program(vcpu, flags);
 757                         r = RESUME_GUEST;
 758                         break;
 759                 case EMULATE_DO_MMIO:
 760                         run->exit_reason = KVM_EXIT_MMIO;
 761                         r = RESUME_HOST_NV;
 762                         break;
 763                 default:
 764                         BUG();
 765                 }
 766                 break;
 767         }
 768         case BOOK3S_INTERRUPT_SYSCALL:
 769                 if (vcpu->arch.papr_enabled &&
 770                     (kvmppc_get_last_inst(vcpu) == 0x44000022) &&
 771                     !(vcpu->arch.shared->msr & MSR_PR)) {
 772                         /* SC 1 papr hypercalls */
 773                         ulong cmd = kvmppc_get_gpr(vcpu, 3);
 774                         int i;
 775
 776 #ifdef CONFIG_KVM_BOOK3S_64_PR
 777                         if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
 778                                 r = RESUME_GUEST;
 779                                 break;
 780                         }
 781 #endif
 782
 783                         run->papr_hcall.nr = cmd;
 784                         for (i = 0; i < 9; ++i) {
 785                                 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
 786                                 run->papr_hcall.args[i] = gpr;
 787                         }
 788                         run->exit_reason = KVM_EXIT_PAPR_HCALL;
 789                         vcpu->arch.hcall_needed = 1;
 790                         r = RESUME_HOST;
 791                 } else if (vcpu->arch.osi_enabled &&
 792                     (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
 793                     (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
 794                         /* MOL hypercalls */
 795                         u64 *gprs = run->osi.gprs;
 796                         int i;
 797
 798                         run->exit_reason = KVM_EXIT_OSI;
 799                         for (i = 0; i < 32; i++)
 800                                 gprs[i] = kvmppc_get_gpr(vcpu, i);
 801                         vcpu->arch.osi_needed = 1;
 802                         r = RESUME_HOST_NV;
 803                 } else if (!(vcpu->arch.shared->msr & MSR_PR) &&
 804                     (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
 805                         /* KVM PV hypercalls */
 806                         kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
 807                         r = RESUME_GUEST;
 808                 } else {
 809                         /* Guest syscalls */
 810                         vcpu->stat.syscall_exits++;
 811                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 812                         r = RESUME_GUEST;
 813                 }
 814                 break;
 815         case BOOK3S_INTERRUPT_FP_UNAVAIL:
 816         case BOOK3S_INTERRUPT_ALTIVEC:
 817         case BOOK3S_INTERRUPT_VSX:
 818         {
 819                 int ext_msr = 0;
 820
 821                 switch (exit_nr) {
 822                 case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP;  break;
 823                 case BOOK3S_INTERRUPT_ALTIVEC:    ext_msr = MSR_VEC; break;
 824                 case BOOK3S_INTERRUPT_VSX:        ext_msr = MSR_VSX; break;
 825                 }
 826
 827                 switch (kvmppc_check_ext(vcpu, exit_nr)) {
 828                 case EMULATE_DONE:
 829                         /* everything ok - let's enable the ext */
 830                         r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
 831                         break;
 832                 case EMULATE_FAIL:
 833                         /* we need to emulate this instruction */
 834                         goto program_interrupt;
 835                         break;
 836                 default:
 837                         /* nothing to worry about - go again */
 838                         break;
 839                 }
 840                 break;
 841         }
 842         case BOOK3S_INTERRUPT_ALIGNMENT:
 843                 if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
 844                         vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
 845                                 kvmppc_get_last_inst(vcpu));
 846                         vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
 847                                 kvmppc_get_last_inst(vcpu));
 848                         kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 849                 }
 850                 r = RESUME_GUEST;
 851                 break;
 852         case BOOK3S_INTERRUPT_MACHINE_CHECK:
 853         case BOOK3S_INTERRUPT_TRACE:
 854                 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
 855                 r = RESUME_GUEST;
 856                 break;
 857         default:
 858         {
 859                 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 860                 ulong shadow_srr1 = svcpu->shadow_srr1;
 861                 svcpu_put(svcpu);
 862                 /* Ugh - bork here! What did we get? */
 863                 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
 864                         exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
 865                 r = RESUME_HOST;
 866                 BUG();
 867                 break;
 868         }
 869         }
 870
 871         if (!(r & RESUME_HOST)) {
 872                 /* To avoid clobbering exit_reason, only check for signals if
 873                  * we aren't already exiting to userspace for some other
 874                  * reason. */
 875
 876                 /*
 877                  * Interrupts could be timers for the guest which we have to
 878                  * inject again, so let's postpone them until we're in the guest
 879                  * and if we really did time things so badly, then we just exit
 880                  * again due to a host external interrupt.
 881                  */
 882                 local_irq_disable();
 883                 s = kvmppc_prepare_to_enter(vcpu);
 884                 if (s <= 0) {
 885                         local_irq_enable();
 886                         r = s;
 887                 } else {
 888                         kvmppc_lazy_ee_enable();
 889                 }
 890         }
 891
 892         trace_kvm_book3s_reenter(r, vcpu);
 893
 894         return r;
 895 }
 896
 897 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 898                                   struct kvm_sregs *sregs)
 899 {
 900         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
 901         int i;
 902
 903         sregs->pvr = vcpu->arch.pvr;
 904
 905         sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
 906         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
 907                 for (i = 0; i < 64; i++) {
 908                         sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
 909                         sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
 910                 }
 911         } else {
 912                 for (i = 0; i < 16; i++)
 913                         sregs->u.s.ppc32.sr[i] = vcpu->arch.shared->sr[i];
 914
 915                 for (i = 0; i < 8; i++) {
 916                         sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
 917                         sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
 918                 }
 919         }
 920
 921         return 0;
 922 }
 923
 924 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 925                                   struct kvm_sregs *sregs)
 926 {
 927         struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
 928         int i;
 929
 930         kvmppc_set_pvr(vcpu, sregs->pvr);
 931
 932         vcpu3s->sdr1 = sregs->u.s.sdr1;
 933         if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
 934                 for (i = 0; i < 64; i++) {
 935                         vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
 936                                                     sregs->u.s.ppc64.slb[i].slbe);
 937                 }
 938         } else {
 939                 for (i = 0; i < 16; i++) {
 940                         vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
 941                 }
 942                 for (i = 0; i < 8; i++) {
 943                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
 944                                        (u32)sregs->u.s.ppc32.ibat[i]);
 945                         kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
 946                                        (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
 947                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
 948                                        (u32)sregs->u.s.ppc32.dbat[i]);
 949                         kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
 950                                        (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
 951                 }
 952         }
 953
 954         /* Flush the MMU after messing with the segments */
 955         kvmppc_mmu_pte_flush(vcpu, 0, 0);
 956
 957         return 0;
 958 }
 959
 960 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val)
 961 {
 962         int r = 0;
 963
 964         switch (id) {
 965         case KVM_REG_PPC_HIOR:
 966                 *val = get_reg_val(id, to_book3s(vcpu)->hior);
 967                 break;
 968 #ifdef CONFIG_VSX
 969         case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31: {
 970                 long int i = id - KVM_REG_PPC_VSR0;
 971
 972                 if (!cpu_has_feature(CPU_FTR_VSX)) {
 973                         r = -ENXIO;
 974                         break;
 975                 }
 976                 val->vsxval[0] = vcpu->arch.fpr[i];
 977                 val->vsxval[1] = vcpu->arch.vsr[i];
 978                 break;
 979         }
 980 #endif /* CONFIG_VSX */
 981         default:
 982                 r = -EINVAL;
 983                 break;
 984         }
 985
 986         return r;
 987 }
 988
 989 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val)
 990 {
 991         int r = 0;
 992
 993         switch (id) {
 994         case KVM_REG_PPC_HIOR:
 995                 to_book3s(vcpu)->hior = set_reg_val(id, *val);
 996                 to_book3s(vcpu)->hior_explicit = true;
 997                 break;
 998 #ifdef CONFIG_VSX
 999         case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31: {
1000                 long int i = id - KVM_REG_PPC_VSR0;
1001
1002                 if (!cpu_has_feature(CPU_FTR_VSX)) {
1003                         r = -ENXIO;
1004                         break;
1005                 }
1006                 vcpu->arch.fpr[i] = val->vsxval[0];
1007                 vcpu->arch.vsr[i] = val->vsxval[1];
1008                 break;
1009         }
1010 #endif /* CONFIG_VSX */
1011         default:
1012                 r = -EINVAL;
1013                 break;
1014         }
1015
1016         return r;
1017 }
1018
1019 int kvmppc_core_check_processor_compat(void)
1020 {
1021         return 0;
1022 }
1023
1024 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
1025 {
1026         struct kvmppc_vcpu_book3s *vcpu_book3s;
1027         struct kvm_vcpu *vcpu;
1028         int err = -ENOMEM;
1029         unsigned long p;
1030
1031         vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
1032         if (!vcpu_book3s)
1033                 goto out;
1034
1035         vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *)
1036                 kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
1037         if (!vcpu_book3s->shadow_vcpu)
1038                 goto free_vcpu;
1039
1040         vcpu = &vcpu_book3s->vcpu;
1041         err = kvm_vcpu_init(vcpu, kvm, id);
1042         if (err)
1043                 goto free_shadow_vcpu;
1044
1045         p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
1046         /* the real shared page fills the last 4k of our page */
1047         vcpu->arch.shared = (void*)(p + PAGE_SIZE - 4096);
1048         if (!p)
1049                 goto uninit_vcpu;
1050
1051 #ifdef CONFIG_PPC_BOOK3S_64
1052         /* default to book3s_64 (970fx) */
1053         vcpu->arch.pvr = 0x3C0301;
1054 #else
1055         /* default to book3s_32 (750) */
1056         vcpu->arch.pvr = 0x84202;
1057 #endif
1058         kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
1059         vcpu->arch.slb_nr = 64;
1060
1061         vcpu->arch.shadow_msr = MSR_USER64;
1062
1063         err = kvmppc_mmu_init(vcpu);
1064         if (err < 0)
1065                 goto uninit_vcpu;
1066
1067         return vcpu;
1068
1069 uninit_vcpu:
1070         kvm_vcpu_uninit(vcpu);
1071 free_shadow_vcpu:
1072         kfree(vcpu_book3s->shadow_vcpu);
1073 free_vcpu:
1074         vfree(vcpu_book3s);
1075 out:
1076         return ERR_PTR(err);
1077 }
1078
1079 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
1080 {
1081         struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1082
1083         free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
1084         kvm_vcpu_uninit(vcpu);
1085         kfree(vcpu_book3s->shadow_vcpu);
1086         vfree(vcpu_book3s);
1087 }
1088
1089 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1090 {
1091         int ret;
1092         double fpr[32][TS_FPRWIDTH];
1093         unsigned int fpscr;
1094         int fpexc_mode;
1095 #ifdef CONFIG_ALTIVEC
1096         vector128 vr[32];
1097         vector128 vscr;
1098         unsigned long uninitialized_var(vrsave);
1099         int used_vr;
1100 #endif
1101 #ifdef CONFIG_VSX
1102         int used_vsr;
1103 #endif
1104         ulong ext_msr;
1105
1106         /* Check if we can run the vcpu at all */
1107         if (!vcpu->arch.sane) {
1108                 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1109                 ret = -EINVAL;
1110                 goto out;
1111         }
1112
1113         /*
1114          * Interrupts could be timers for the guest which we have to inject
1115          * again, so let's postpone them until we're in the guest and if we
1116          * really did time things so badly, then we just exit again due to
1117          * a host external interrupt.
1118          */
1119         local_irq_disable();
1120         ret = kvmppc_prepare_to_enter(vcpu);
1121         if (ret <= 0) {
1122                 local_irq_enable();
1123                 goto out;
1124         }
1125
1126         /* Save FPU state in stack */
1127         if (current->thread.regs->msr & MSR_FP)
1128                 giveup_fpu(current);
1129         memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
1130         fpscr = current->thread.fpscr.val;
1131         fpexc_mode = current->thread.fpexc_mode;
1132
1133 #ifdef CONFIG_ALTIVEC
1134         /* Save Altivec state in stack */
1135         used_vr = current->thread.used_vr;
1136         if (used_vr) {
1137                 if (current->thread.regs->msr & MSR_VEC)
1138                         giveup_altivec(current);
1139                 memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
1140                 vscr = current->thread.vscr;
1141                 vrsave = current->thread.vrsave;
1142         }
1143 #endif
1144
1145 #ifdef CONFIG_VSX
1146         /* Save VSX state in stack */
1147         used_vsr = current->thread.used_vsr;
1148         if (used_vsr && (current->thread.regs->msr & MSR_VSX))
1149                 __giveup_vsx(current);
1150 #endif
1151
1152         /* Remember the MSR with disabled extensions */
1153         ext_msr = current->thread.regs->msr;
1154
1155         /* Preload FPU if it's enabled */
1156         if (vcpu->arch.shared->msr & MSR_FP)
1157                 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1158
1159         kvmppc_lazy_ee_enable();
1160
1161         ret = __kvmppc_vcpu_run(kvm_run, vcpu);
1162
1163         /* No need for kvm_guest_exit. It's done in handle_exit.
1164            We also get here with interrupts enabled. */
1165
1166         /* Make sure we save the guest FPU/Altivec/VSX state */
1167         kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
1168
1169         current->thread.regs->msr = ext_msr;
1170
1171         /* Restore FPU/VSX state from stack */
1172         memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
1173         current->thread.fpscr.val = fpscr;
1174         current->thread.fpexc_mode = fpexc_mode;
1175
1176 #ifdef CONFIG_ALTIVEC
1177         /* Restore Altivec state from stack */
1178         if (used_vr && current->thread.used_vr) {
1179                 memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
1180                 current->thread.vscr = vscr;
1181                 current->thread.vrsave = vrsave;
1182         }
1183         current->thread.used_vr = used_vr;
1184 #endif
1185
1186 #ifdef CONFIG_VSX
1187         current->thread.used_vsr = used_vsr;
1188 #endif
1189
1190 out:
1191         vcpu->mode = OUTSIDE_GUEST_MODE;
1192         return ret;
1193 }
1194
1195 /*
1196  * Get (and clear) the dirty memory log for a memory slot.
1197  */
1198 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1199                                       struct kvm_dirty_log *log)
1200 {
1201         struct kvm_memory_slot *memslot;
1202         struct kvm_vcpu *vcpu;
1203         ulong ga, ga_end;
1204         int is_dirty = 0;
1205         int r;
1206         unsigned long n;
1207
1208         mutex_lock(&kvm->slots_lock);
1209
1210         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1211         if (r)
1212                 goto out;
1213
1214         /* If nothing is dirty, don't bother messing with page tables. */
1215         if (is_dirty) {
1216                 memslot = id_to_memslot(kvm->memslots, log->slot);
1217
1218                 ga = memslot->base_gfn << PAGE_SHIFT;
1219                 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1220
1221                 kvm_for_each_vcpu(n, vcpu, kvm)
1222                         kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1223
1224                 n = kvm_dirty_bitmap_bytes(memslot);
1225                 memset(memslot->dirty_bitmap, 0, n);
1226         }
1227
1228         r = 0;
1229 out:
1230         mutex_unlock(&kvm->slots_lock);
1231         return r;
1232 }
1233
1234 #ifdef CONFIG_PPC64
1235 int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm, struct kvm_ppc_smmu_info *info)
1236 {
1237         /* No flags */
1238         info->flags = 0;
1239
1240         /* SLB is always 64 entries */
1241         info->slb_size = 64;
1242
1243         /* Standard 4k base page size segment */
1244         info->sps[0].page_shift = 12;
1245         info->sps[0].slb_enc = 0;
1246         info->sps[0].enc[0].page_shift = 12;
1247         info->sps[0].enc[0].pte_enc = 0;
1248
1249         /* Standard 16M large page size segment */
1250         info->sps[1].page_shift = 24;
1251         info->sps[1].slb_enc = SLB_VSID_L;
1252         info->sps[1].enc[0].page_shift = 24;
1253         info->sps[1].enc[0].pte_enc = 0;
1254
1255         return 0;
1256 }
1257 #endif /* CONFIG_PPC64 */
1258
1259 void kvmppc_core_free_memslot(struct kvm_memory_slot *free,
1260                               struct kvm_memory_slot *dont)
1261 {
1262 }
1263
1264 int kvmppc_core_create_memslot(struct kvm_memory_slot *slot,
1265                                unsigned long npages)
1266 {
1267         return 0;
1268 }
1269
1270 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1271                                       struct kvm_memory_slot *memslot,
1272                                       struct kvm_userspace_memory_region *mem)
1273 {
1274         return 0;
1275 }
1276
1277 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1278                                 struct kvm_userspace_memory_region *mem,
1279                                 struct kvm_memory_slot old)
1280 {
1281 }
1282
1283 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
1284 {
1285 }
1286
1287 int kvmppc_core_init_vm(struct kvm *kvm)
1288 {
1289 #ifdef CONFIG_PPC64
1290         INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
1291 #endif
1292
1293         return 0;
1294 }
1295
1296 void kvmppc_core_destroy_vm(struct kvm *kvm)
1297 {
1298 #ifdef CONFIG_PPC64
1299         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
1300 #endif
1301 }
1302
1303 static int kvmppc_book3s_init(void)
1304 {
1305         int r;
1306
1307         r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0,
1308                      THIS_MODULE);
1309
1310         if (r)
1311                 return r;
1312
1313         r = kvmppc_mmu_hpte_sysinit();
1314
1315         return r;
1316 }
1317
1318 static void kvmppc_book3s_exit(void)
1319 {
1320         kvmppc_mmu_hpte_sysexit();
1321         kvm_exit();
1322 }
1323
1324 module_init(kvmppc_book3s_init);
1325 module_exit(kvmppc_book3s_exit);