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book3s_pr.c
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1 /*
2  * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
3  *
4  * Authors:
5  * Alexander Graf <[email protected]>
6  * Kevin Wolf <[email protected]>
7  * Paul Mackerras <[email protected]>
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 <[email protected]>.
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 #define __hard_irq_disable local_irq_disable
56 #define __hard_irq_enable local_irq_enable
57 #endif
58 
59 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
60 {
61 #ifdef CONFIG_PPC_BOOK3S_64
62  struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
63  memcpy(svcpu->slb, to_book3s(vcpu)->slb_shadow, sizeof(svcpu->slb));
64  memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu,
65  sizeof(get_paca()->shadow_vcpu));
66  svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
67  svcpu_put(svcpu);
68 #endif
69 
70 #ifdef CONFIG_PPC_BOOK3S_32
71  current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu;
72 #endif
73 }
74 
75 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
76 {
77 #ifdef CONFIG_PPC_BOOK3S_64
78  struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
79  memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
80  memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
81  sizeof(get_paca()->shadow_vcpu));
82  to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
83  svcpu_put(svcpu);
84 #endif
85 
86  kvmppc_giveup_ext(vcpu, MSR_FP);
87  kvmppc_giveup_ext(vcpu, MSR_VEC);
88  kvmppc_giveup_ext(vcpu, MSR_VSX);
89 }
90 
91 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
92 {
93  ulong smsr = vcpu->arch.shared->msr;
94 
95  /* Guest MSR values */
96  smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_DE;
97  /* Process MSR values */
98  smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
99  /* External providers the guest reserved */
100  smsr |= (vcpu->arch.shared->msr & vcpu->arch.guest_owned_ext);
101  /* 64-bit Process MSR values */
102 #ifdef CONFIG_PPC_BOOK3S_64
103  smsr |= MSR_ISF | MSR_HV;
104 #endif
105  vcpu->arch.shadow_msr = smsr;
106 }
107 
108 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
109 {
110  ulong old_msr = vcpu->arch.shared->msr;
111 
112 #ifdef EXIT_DEBUG
113  printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
114 #endif
115 
116  msr &= to_book3s(vcpu)->msr_mask;
117  vcpu->arch.shared->msr = msr;
118  kvmppc_recalc_shadow_msr(vcpu);
119 
120  if (msr & MSR_POW) {
121  if (!vcpu->arch.pending_exceptions) {
122  kvm_vcpu_block(vcpu);
123  clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
124  vcpu->stat.halt_wakeup++;
125 
126  /* Unset POW bit after we woke up */
127  msr &= ~MSR_POW;
128  vcpu->arch.shared->msr = msr;
129  }
130  }
131 
132  if ((vcpu->arch.shared->msr & (MSR_PR|MSR_IR|MSR_DR)) !=
133  (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
134  kvmppc_mmu_flush_segments(vcpu);
135  kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
136 
137  /* Preload magic page segment when in kernel mode */
138  if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
139  struct kvm_vcpu_arch *a = &vcpu->arch;
140 
141  if (msr & MSR_DR)
142  kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
143  else
144  kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
145  }
146  }
147 
148  /*
149  * When switching from 32 to 64-bit, we may have a stale 32-bit
150  * magic page around, we need to flush it. Typically 32-bit magic
151  * page will be instanciated when calling into RTAS. Note: We
152  * assume that such transition only happens while in kernel mode,
153  * ie, we never transition from user 32-bit to kernel 64-bit with
154  * a 32-bit magic page around.
155  */
156  if (vcpu->arch.magic_page_pa &&
157  !(old_msr & MSR_PR) && !(old_msr & MSR_SF) && (msr & MSR_SF)) {
158  /* going from RTAS to normal kernel code */
159  kvmppc_mmu_pte_flush(vcpu, (uint32_t)vcpu->arch.magic_page_pa,
160  ~0xFFFUL);
161  }
162 
163  /* Preload FPU if it's enabled */
164  if (vcpu->arch.shared->msr & MSR_FP)
165  kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
166 }
167 
168 void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
169 {
170  u32 host_pvr;
171 
172  vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
173  vcpu->arch.pvr = pvr;
174 #ifdef CONFIG_PPC_BOOK3S_64
175  if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
176  kvmppc_mmu_book3s_64_init(vcpu);
177  if (!to_book3s(vcpu)->hior_explicit)
178  to_book3s(vcpu)->hior = 0xfff00000;
179  to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
180  vcpu->arch.cpu_type = KVM_CPU_3S_64;
181  } else
182 #endif
183  {
184  kvmppc_mmu_book3s_32_init(vcpu);
185  if (!to_book3s(vcpu)->hior_explicit)
186  to_book3s(vcpu)->hior = 0;
187  to_book3s(vcpu)->msr_mask = 0xffffffffULL;
188  vcpu->arch.cpu_type = KVM_CPU_3S_32;
189  }
190 
191  kvmppc_sanity_check(vcpu);
192 
193  /* If we are in hypervisor level on 970, we can tell the CPU to
194  * treat DCBZ as 32 bytes store */
195  vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
196  if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
197  !strcmp(cur_cpu_spec->platform, "ppc970"))
198  vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
199 
200  /* Cell performs badly if MSR_FEx are set. So let's hope nobody
201  really needs them in a VM on Cell and force disable them. */
202  if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
203  to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
204 
205 #ifdef CONFIG_PPC_BOOK3S_32
206  /* 32 bit Book3S always has 32 byte dcbz */
207  vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
208 #endif
209 
210  /* On some CPUs we can execute paired single operations natively */
211  asm ( "mfpvr %0" : "=r"(host_pvr));
212  switch (host_pvr) {
213  case 0x00080200: /* lonestar 2.0 */
214  case 0x00088202: /* lonestar 2.2 */
215  case 0x70000100: /* gekko 1.0 */
216  case 0x00080100: /* gekko 2.0 */
217  case 0x00083203: /* gekko 2.3a */
218  case 0x00083213: /* gekko 2.3b */
219  case 0x00083204: /* gekko 2.4 */
220  case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
221  case 0x00087200: /* broadway */
222  vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
223  /* Enable HID2.PSE - in case we need it later */
224  mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
225  }
226 }
227 
228 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
229  * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
230  * emulate 32 bytes dcbz length.
231  *
232  * The Book3s_64 inventors also realized this case and implemented a special bit
233  * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
234  *
235  * My approach here is to patch the dcbz instruction on executing pages.
236  */
237 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
238 {
239  struct page *hpage;
240  u64 hpage_offset;
241  u32 *page;
242  int i;
243 
244  hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
245  if (is_error_page(hpage))
246  return;
247 
248  hpage_offset = pte->raddr & ~PAGE_MASK;
249  hpage_offset &= ~0xFFFULL;
250  hpage_offset /= 4;
251 
252  get_page(hpage);
253  page = kmap_atomic(hpage);
254 
255  /* patch dcbz into reserved instruction, so we trap */
256  for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
257  if ((page[i] & 0xff0007ff) == INS_DCBZ)
258  page[i] &= 0xfffffff7;
259 
260  kunmap_atomic(page);
261  put_page(hpage);
262 }
263 
264 static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
265 {
266  ulong mp_pa = vcpu->arch.magic_page_pa;
267 
268  if (!(vcpu->arch.shared->msr & MSR_SF))
269  mp_pa = (uint32_t)mp_pa;
270 
271  if (unlikely(mp_pa) &&
272  unlikely((mp_pa & KVM_PAM) >> PAGE_SHIFT == gfn)) {
273  return 1;
274  }
275 
276  return kvm_is_visible_gfn(vcpu->kvm, gfn);
277 }
278 
279 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
280  ulong eaddr, int vec)
281 {
282  bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
283  int r = RESUME_GUEST;
284  int relocated;
285  int page_found = 0;
286  struct kvmppc_pte pte;
287  bool is_mmio = false;
288  bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
289  bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
290  u64 vsid;
291 
292  relocated = data ? dr : ir;
293 
294  /* Resolve real address if translation turned on */
295  if (relocated) {
296  page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
297  } else {
298  pte.may_execute = true;
299  pte.may_read = true;
300  pte.may_write = true;
301  pte.raddr = eaddr & KVM_PAM;
302  pte.eaddr = eaddr;
303  pte.vpage = eaddr >> 12;
304  }
305 
306  switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
307  case 0:
308  pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
309  break;
310  case MSR_DR:
311  case MSR_IR:
312  vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
313 
314  if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
315  pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
316  else
317  pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
318  pte.vpage |= vsid;
319 
320  if (vsid == -1)
321  page_found = -EINVAL;
322  break;
323  }
324 
325  if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
326  (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
327  /*
328  * If we do the dcbz hack, we have to NX on every execution,
329  * so we can patch the executing code. This renders our guest
330  * NX-less.
331  */
332  pte.may_execute = !data;
333  }
334 
335  if (page_found == -ENOENT) {
336  /* Page not found in guest PTE entries */
337  struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
338  vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
339  vcpu->arch.shared->dsisr = svcpu->fault_dsisr;
340  vcpu->arch.shared->msr |=
341  (svcpu->shadow_srr1 & 0x00000000f8000000ULL);
342  svcpu_put(svcpu);
343  kvmppc_book3s_queue_irqprio(vcpu, vec);
344  } else if (page_found == -EPERM) {
345  /* Storage protection */
346  struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
347  vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
348  vcpu->arch.shared->dsisr = svcpu->fault_dsisr & ~DSISR_NOHPTE;
349  vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
350  vcpu->arch.shared->msr |=
351  svcpu->shadow_srr1 & 0x00000000f8000000ULL;
352  svcpu_put(svcpu);
353  kvmppc_book3s_queue_irqprio(vcpu, vec);
354  } else if (page_found == -EINVAL) {
355  /* Page not found in guest SLB */
356  vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
357  kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
358  } else if (!is_mmio &&
359  kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
360  /* The guest's PTE is not mapped yet. Map on the host */
361  kvmppc_mmu_map_page(vcpu, &pte);
362  if (data)
363  vcpu->stat.sp_storage++;
364  else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
365  (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
366  kvmppc_patch_dcbz(vcpu, &pte);
367  } else {
368  /* MMIO */
369  vcpu->stat.mmio_exits++;
370  vcpu->arch.paddr_accessed = pte.raddr;
371  vcpu->arch.vaddr_accessed = pte.eaddr;
372  r = kvmppc_emulate_mmio(run, vcpu);
373  if ( r == RESUME_HOST_NV )
374  r = RESUME_HOST;
375  }
376 
377  return r;
378 }
379 
380 static inline int get_fpr_index(int i)
381 {
382 #ifdef CONFIG_VSX
383  i *= 2;
384 #endif
385  return i;
386 }
387 
388 /* Give up external provider (FPU, Altivec, VSX) */
389 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
390 {
391  struct thread_struct *t = &current->thread;
392  u64 *vcpu_fpr = vcpu->arch.fpr;
393 #ifdef CONFIG_VSX
394  u64 *vcpu_vsx = vcpu->arch.vsr;
395 #endif
396  u64 *thread_fpr = (u64*)t->fpr;
397  int i;
398 
399  if (!(vcpu->arch.guest_owned_ext & msr))
400  return;
401 
402 #ifdef DEBUG_EXT
403  printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
404 #endif
405 
406  switch (msr) {
407  case MSR_FP:
408  giveup_fpu(current);
409  for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
410  vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];
411 
412  vcpu->arch.fpscr = t->fpscr.val;
413  break;
414  case MSR_VEC:
415 #ifdef CONFIG_ALTIVEC
416  giveup_altivec(current);
417  memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
418  vcpu->arch.vscr = t->vscr;
419 #endif
420  break;
421  case MSR_VSX:
422 #ifdef CONFIG_VSX
423  __giveup_vsx(current);
424  for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
425  vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1];
426 #endif
427  break;
428  default:
429  BUG();
430  }
431 
432  vcpu->arch.guest_owned_ext &= ~msr;
433  current->thread.regs->msr &= ~msr;
434  kvmppc_recalc_shadow_msr(vcpu);
435 }
436 
437 static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
438 {
439  ulong srr0 = kvmppc_get_pc(vcpu);
440  u32 last_inst = kvmppc_get_last_inst(vcpu);
441  int ret;
442 
443  ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
444  if (ret == -ENOENT) {
445  ulong msr = vcpu->arch.shared->msr;
446 
447  msr = kvmppc_set_field(msr, 33, 33, 1);
448  msr = kvmppc_set_field(msr, 34, 36, 0);
449  vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
450  kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
451  return EMULATE_AGAIN;
452  }
453 
454  return EMULATE_DONE;
455 }
456 
457 static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
458 {
459 
460  /* Need to do paired single emulation? */
461  if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
462  return EMULATE_DONE;
463 
464  /* Read out the instruction */
465  if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
466  /* Need to emulate */
467  return EMULATE_FAIL;
468 
469  return EMULATE_AGAIN;
470 }
471 
472 /* Handle external providers (FPU, Altivec, VSX) */
473 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
474  ulong msr)
475 {
476  struct thread_struct *t = &current->thread;
477  u64 *vcpu_fpr = vcpu->arch.fpr;
478 #ifdef CONFIG_VSX
479  u64 *vcpu_vsx = vcpu->arch.vsr;
480 #endif
481  u64 *thread_fpr = (u64*)t->fpr;
482  int i;
483 
484  /* When we have paired singles, we emulate in software */
485  if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
486  return RESUME_GUEST;
487 
488  if (!(vcpu->arch.shared->msr & msr)) {
489  kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
490  return RESUME_GUEST;
491  }
492 
493  /* We already own the ext */
494  if (vcpu->arch.guest_owned_ext & msr) {
495  return RESUME_GUEST;
496  }
497 
498 #ifdef DEBUG_EXT
499  printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
500 #endif
501 
502  current->thread.regs->msr |= msr;
503 
504  switch (msr) {
505  case MSR_FP:
506  for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
507  thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];
508 
509  t->fpscr.val = vcpu->arch.fpscr;
510  t->fpexc_mode = 0;
511  kvmppc_load_up_fpu();
512  break;
513  case MSR_VEC:
514 #ifdef CONFIG_ALTIVEC
515  memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
516  t->vscr = vcpu->arch.vscr;
517  t->vrsave = -1;
518  kvmppc_load_up_altivec();
519 #endif
520  break;
521  case MSR_VSX:
522 #ifdef CONFIG_VSX
523  for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
524  thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
525  kvmppc_load_up_vsx();
526 #endif
527  break;
528  default:
529  BUG();
530  }
531 
532  vcpu->arch.guest_owned_ext |= msr;
533 
534  kvmppc_recalc_shadow_msr(vcpu);
535 
536  return RESUME_GUEST;
537 }
538 
539 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
540  unsigned int exit_nr)
541 {
542  int r = RESUME_HOST;
543 
544  vcpu->stat.sum_exits++;
545 
546  run->exit_reason = KVM_EXIT_UNKNOWN;
547  run->ready_for_interrupt_injection = 1;
548 
549  /* We get here with MSR.EE=0, so enable it to be a nice citizen */
550  __hard_irq_enable();
551 
552  trace_kvm_book3s_exit(exit_nr, vcpu);
553  preempt_enable();
554  kvm_resched(vcpu);
555  switch (exit_nr) {
556  case BOOK3S_INTERRUPT_INST_STORAGE:
557  {
558  struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
559  ulong shadow_srr1 = svcpu->shadow_srr1;
560  vcpu->stat.pf_instruc++;
561 
562 #ifdef CONFIG_PPC_BOOK3S_32
563  /* We set segments as unused segments when invalidating them. So
564  * treat the respective fault as segment fault. */
565  if (svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT] == SR_INVALID) {
566  kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
567  r = RESUME_GUEST;
568  svcpu_put(svcpu);
569  break;
570  }
571 #endif
572  svcpu_put(svcpu);
573 
574  /* only care about PTEG not found errors, but leave NX alone */
575  if (shadow_srr1 & 0x40000000) {
576  r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
577  vcpu->stat.sp_instruc++;
578  } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
579  (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
580  /*
581  * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
582  * so we can't use the NX bit inside the guest. Let's cross our fingers,
583  * that no guest that needs the dcbz hack does NX.
584  */
585  kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
586  r = RESUME_GUEST;
587  } else {
588  vcpu->arch.shared->msr |= shadow_srr1 & 0x58000000;
589  kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
590  r = RESUME_GUEST;
591  }
592  break;
593  }
594  case BOOK3S_INTERRUPT_DATA_STORAGE:
595  {
596  ulong dar = kvmppc_get_fault_dar(vcpu);
597  struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
598  u32 fault_dsisr = svcpu->fault_dsisr;
599  vcpu->stat.pf_storage++;
600 
601 #ifdef CONFIG_PPC_BOOK3S_32
602  /* We set segments as unused segments when invalidating them. So
603  * treat the respective fault as segment fault. */
604  if ((svcpu->sr[dar >> SID_SHIFT]) == SR_INVALID) {
605  kvmppc_mmu_map_segment(vcpu, dar);
606  r = RESUME_GUEST;
607  svcpu_put(svcpu);
608  break;
609  }
610 #endif
611  svcpu_put(svcpu);
612 
613  /* The only case we need to handle is missing shadow PTEs */
614  if (fault_dsisr & DSISR_NOHPTE) {
615  r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
616  } else {
617  vcpu->arch.shared->dar = dar;
618  vcpu->arch.shared->dsisr = fault_dsisr;
619  kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
620  r = RESUME_GUEST;
621  }
622  break;
623  }
624  case BOOK3S_INTERRUPT_DATA_SEGMENT:
625  if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
626  vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
627  kvmppc_book3s_queue_irqprio(vcpu,
628  BOOK3S_INTERRUPT_DATA_SEGMENT);
629  }
630  r = RESUME_GUEST;
631  break;
632  case BOOK3S_INTERRUPT_INST_SEGMENT:
633  if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
634  kvmppc_book3s_queue_irqprio(vcpu,
635  BOOK3S_INTERRUPT_INST_SEGMENT);
636  }
637  r = RESUME_GUEST;
638  break;
639  /* We're good on these - the host merely wanted to get our attention */
640  case BOOK3S_INTERRUPT_DECREMENTER:
641  case BOOK3S_INTERRUPT_HV_DECREMENTER:
642  vcpu->stat.dec_exits++;
643  r = RESUME_GUEST;
644  break;
645  case BOOK3S_INTERRUPT_EXTERNAL:
646  case BOOK3S_INTERRUPT_EXTERNAL_LEVEL:
647  case BOOK3S_INTERRUPT_EXTERNAL_HV:
648  vcpu->stat.ext_intr_exits++;
649  r = RESUME_GUEST;
650  break;
651  case BOOK3S_INTERRUPT_PERFMON:
652  r = RESUME_GUEST;
653  break;
654  case BOOK3S_INTERRUPT_PROGRAM:
655  case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
656  {
657  enum emulation_result er;
658  struct kvmppc_book3s_shadow_vcpu *svcpu;
659  ulong flags;
660 
661 program_interrupt:
662  svcpu = svcpu_get(vcpu);
663  flags = svcpu->shadow_srr1 & 0x1f0000ull;
664  svcpu_put(svcpu);
665 
666  if (vcpu->arch.shared->msr & MSR_PR) {
667 #ifdef EXIT_DEBUG
668  printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
669 #endif
670  if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
671  (INS_DCBZ & 0xfffffff7)) {
672  kvmppc_core_queue_program(vcpu, flags);
673  r = RESUME_GUEST;
674  break;
675  }
676  }
677 
678  vcpu->stat.emulated_inst_exits++;
679  er = kvmppc_emulate_instruction(run, vcpu);
680  switch (er) {
681  case EMULATE_DONE:
682  r = RESUME_GUEST_NV;
683  break;
684  case EMULATE_AGAIN:
685  r = RESUME_GUEST;
686  break;
687  case EMULATE_FAIL:
688  printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
689  __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
690  kvmppc_core_queue_program(vcpu, flags);
691  r = RESUME_GUEST;
692  break;
693  case EMULATE_DO_MMIO:
694  run->exit_reason = KVM_EXIT_MMIO;
695  r = RESUME_HOST_NV;
696  break;
697  default:
698  BUG();
699  }
700  break;
701  }
702  case BOOK3S_INTERRUPT_SYSCALL:
703  if (vcpu->arch.papr_enabled &&
704  (kvmppc_get_last_inst(vcpu) == 0x44000022) &&
705  !(vcpu->arch.shared->msr & MSR_PR)) {
706  /* SC 1 papr hypercalls */
707  ulong cmd = kvmppc_get_gpr(vcpu, 3);
708  int i;
709 
710 #ifdef CONFIG_KVM_BOOK3S_64_PR
711  if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
712  r = RESUME_GUEST;
713  break;
714  }
715 #endif
716 
717  run->papr_hcall.nr = cmd;
718  for (i = 0; i < 9; ++i) {
719  ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
720  run->papr_hcall.args[i] = gpr;
721  }
722  run->exit_reason = KVM_EXIT_PAPR_HCALL;
723  vcpu->arch.hcall_needed = 1;
724  r = RESUME_HOST;
725  } else if (vcpu->arch.osi_enabled &&
726  (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
727  (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
728  /* MOL hypercalls */
729  u64 *gprs = run->osi.gprs;
730  int i;
731 
732  run->exit_reason = KVM_EXIT_OSI;
733  for (i = 0; i < 32; i++)
734  gprs[i] = kvmppc_get_gpr(vcpu, i);
735  vcpu->arch.osi_needed = 1;
736  r = RESUME_HOST_NV;
737  } else if (!(vcpu->arch.shared->msr & MSR_PR) &&
738  (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
739  /* KVM PV hypercalls */
740  kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
741  r = RESUME_GUEST;
742  } else {
743  /* Guest syscalls */
744  vcpu->stat.syscall_exits++;
745  kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
746  r = RESUME_GUEST;
747  }
748  break;
749  case BOOK3S_INTERRUPT_FP_UNAVAIL:
750  case BOOK3S_INTERRUPT_ALTIVEC:
751  case BOOK3S_INTERRUPT_VSX:
752  {
753  int ext_msr = 0;
754 
755  switch (exit_nr) {
756  case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP; break;
757  case BOOK3S_INTERRUPT_ALTIVEC: ext_msr = MSR_VEC; break;
758  case BOOK3S_INTERRUPT_VSX: ext_msr = MSR_VSX; break;
759  }
760 
761  switch (kvmppc_check_ext(vcpu, exit_nr)) {
762  case EMULATE_DONE:
763  /* everything ok - let's enable the ext */
764  r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
765  break;
766  case EMULATE_FAIL:
767  /* we need to emulate this instruction */
768  goto program_interrupt;
769  break;
770  default:
771  /* nothing to worry about - go again */
772  break;
773  }
774  break;
775  }
776  case BOOK3S_INTERRUPT_ALIGNMENT:
777  if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
778  vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
779  kvmppc_get_last_inst(vcpu));
780  vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
781  kvmppc_get_last_inst(vcpu));
782  kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
783  }
784  r = RESUME_GUEST;
785  break;
786  case BOOK3S_INTERRUPT_MACHINE_CHECK:
787  case BOOK3S_INTERRUPT_TRACE:
788  kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
789  r = RESUME_GUEST;
790  break;
791  default:
792  {
793  struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
794  ulong shadow_srr1 = svcpu->shadow_srr1;
795  svcpu_put(svcpu);
796  /* Ugh - bork here! What did we get? */
797  printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
798  exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
799  r = RESUME_HOST;
800  BUG();
801  break;
802  }
803  }
804 
805  preempt_disable();
806  if (!(r & RESUME_HOST)) {
807  /* To avoid clobbering exit_reason, only check for signals if
808  * we aren't already exiting to userspace for some other
809  * reason. */
810 
811  /*
812  * Interrupts could be timers for the guest which we have to
813  * inject again, so let's postpone them until we're in the guest
814  * and if we really did time things so badly, then we just exit
815  * again due to a host external interrupt.
816  */
817  __hard_irq_disable();
818  if (signal_pending(current)) {
819  __hard_irq_enable();
820 #ifdef EXIT_DEBUG
821  printk(KERN_EMERG "KVM: Going back to host\n");
822 #endif
823  vcpu->stat.signal_exits++;
824  run->exit_reason = KVM_EXIT_INTR;
825  r = -EINTR;
826  } else {
827  /* In case an interrupt came in that was triggered
828  * from userspace (like DEC), we need to check what
829  * to inject now! */
830  kvmppc_core_prepare_to_enter(vcpu);
831  }
832  }
833 
834  trace_kvm_book3s_reenter(r, vcpu);
835 
836  return r;
837 }
838 
839 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
840  struct kvm_sregs *sregs)
841 {
842  struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
843  int i;
844 
845  sregs->pvr = vcpu->arch.pvr;
846 
847  sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
848  if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
849  for (i = 0; i < 64; i++) {
850  sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
851  sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
852  }
853  } else {
854  for (i = 0; i < 16; i++)
855  sregs->u.s.ppc32.sr[i] = vcpu->arch.shared->sr[i];
856 
857  for (i = 0; i < 8; i++) {
858  sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
859  sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
860  }
861  }
862 
863  return 0;
864 }
865 
866 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
867  struct kvm_sregs *sregs)
868 {
869  struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
870  int i;
871 
872  kvmppc_set_pvr(vcpu, sregs->pvr);
873 
874  vcpu3s->sdr1 = sregs->u.s.sdr1;
875  if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
876  for (i = 0; i < 64; i++) {
877  vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
878  sregs->u.s.ppc64.slb[i].slbe);
879  }
880  } else {
881  for (i = 0; i < 16; i++) {
882  vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
883  }
884  for (i = 0; i < 8; i++) {
885  kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
886  (u32)sregs->u.s.ppc32.ibat[i]);
887  kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
888  (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
889  kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
890  (u32)sregs->u.s.ppc32.dbat[i]);
891  kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
892  (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
893  }
894  }
895 
896  /* Flush the MMU after messing with the segments */
897  kvmppc_mmu_pte_flush(vcpu, 0, 0);
898 
899  return 0;
900 }
901 
902 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
903 {
904  int r = -EINVAL;
905 
906  switch (reg->id) {
907  case KVM_REG_PPC_HIOR:
908  r = copy_to_user((u64 __user *)(long)reg->addr,
909  &to_book3s(vcpu)->hior, sizeof(u64));
910  break;
911  default:
912  break;
913  }
914 
915  return r;
916 }
917 
918 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
919 {
920  int r = -EINVAL;
921 
922  switch (reg->id) {
923  case KVM_REG_PPC_HIOR:
924  r = copy_from_user(&to_book3s(vcpu)->hior,
925  (u64 __user *)(long)reg->addr, sizeof(u64));
926  if (!r)
927  to_book3s(vcpu)->hior_explicit = true;
928  break;
929  default:
930  break;
931  }
932 
933  return r;
934 }
935 
936 int kvmppc_core_check_processor_compat(void)
937 {
938  return 0;
939 }
940 
941 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
942 {
943  struct kvmppc_vcpu_book3s *vcpu_book3s;
944  struct kvm_vcpu *vcpu;
945  int err = -ENOMEM;
946  unsigned long p;
947 
948  vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
949  if (!vcpu_book3s)
950  goto out;
951 
952  vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *)
953  kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
954  if (!vcpu_book3s->shadow_vcpu)
955  goto free_vcpu;
956 
957  vcpu = &vcpu_book3s->vcpu;
958  err = kvm_vcpu_init(vcpu, kvm, id);
959  if (err)
960  goto free_shadow_vcpu;
961 
962  p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
963  /* the real shared page fills the last 4k of our page */
964  vcpu->arch.shared = (void*)(p + PAGE_SIZE - 4096);
965  if (!p)
966  goto uninit_vcpu;
967 
968 #ifdef CONFIG_PPC_BOOK3S_64
969  /* default to book3s_64 (970fx) */
970  vcpu->arch.pvr = 0x3C0301;
971 #else
972  /* default to book3s_32 (750) */
973  vcpu->arch.pvr = 0x84202;
974 #endif
975  kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
976  vcpu->arch.slb_nr = 64;
977 
978  vcpu->arch.shadow_msr = MSR_USER64;
979 
980  err = kvmppc_mmu_init(vcpu);
981  if (err < 0)
982  goto uninit_vcpu;
983 
984  return vcpu;
985 
986 uninit_vcpu:
987  kvm_vcpu_uninit(vcpu);
988 free_shadow_vcpu:
989  kfree(vcpu_book3s->shadow_vcpu);
990 free_vcpu:
991  vfree(vcpu_book3s);
992 out:
993  return ERR_PTR(err);
994 }
995 
996 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
997 {
998  struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
999 
1000  free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
1001  kvm_vcpu_uninit(vcpu);
1002  kfree(vcpu_book3s->shadow_vcpu);
1003  vfree(vcpu_book3s);
1004 }
1005 
1006 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1007 {
1008  int ret;
1009  double fpr[32][TS_FPRWIDTH];
1010  unsigned int fpscr;
1011  int fpexc_mode;
1012 #ifdef CONFIG_ALTIVEC
1013  vector128 vr[32];
1014  vector128 vscr;
1015  unsigned long uninitialized_var(vrsave);
1016  int used_vr;
1017 #endif
1018 #ifdef CONFIG_VSX
1019  int used_vsr;
1020 #endif
1021  ulong ext_msr;
1022 
1023  preempt_disable();
1024 
1025  /* Check if we can run the vcpu at all */
1026  if (!vcpu->arch.sane) {
1027  kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1028  ret = -EINVAL;
1029  goto out;
1030  }
1031 
1032  kvmppc_core_prepare_to_enter(vcpu);
1033 
1034  /*
1035  * Interrupts could be timers for the guest which we have to inject
1036  * again, so let's postpone them until we're in the guest and if we
1037  * really did time things so badly, then we just exit again due to
1038  * a host external interrupt.
1039  */
1040  __hard_irq_disable();
1041 
1042  /* No need to go into the guest when all we do is going out */
1043  if (signal_pending(current)) {
1044  __hard_irq_enable();
1045  kvm_run->exit_reason = KVM_EXIT_INTR;
1046  ret = -EINTR;
1047  goto out;
1048  }
1049 
1050  /* Save FPU state in stack */
1051  if (current->thread.regs->msr & MSR_FP)
1052  giveup_fpu(current);
1053  memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
1054  fpscr = current->thread.fpscr.val;
1055  fpexc_mode = current->thread.fpexc_mode;
1056 
1057 #ifdef CONFIG_ALTIVEC
1058  /* Save Altivec state in stack */
1059  used_vr = current->thread.used_vr;
1060  if (used_vr) {
1061  if (current->thread.regs->msr & MSR_VEC)
1062  giveup_altivec(current);
1063  memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
1064  vscr = current->thread.vscr;
1065  vrsave = current->thread.vrsave;
1066  }
1067 #endif
1068 
1069 #ifdef CONFIG_VSX
1070  /* Save VSX state in stack */
1071  used_vsr = current->thread.used_vsr;
1072  if (used_vsr && (current->thread.regs->msr & MSR_VSX))
1073  __giveup_vsx(current);
1074 #endif
1075 
1076  /* Remember the MSR with disabled extensions */
1077  ext_msr = current->thread.regs->msr;
1078 
1079  /* Preload FPU if it's enabled */
1080  if (vcpu->arch.shared->msr & MSR_FP)
1081  kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1082 
1083  kvm_guest_enter();
1084 
1085  ret = __kvmppc_vcpu_run(kvm_run, vcpu);
1086 
1087  kvm_guest_exit();
1088 
1089  current->thread.regs->msr = ext_msr;
1090 
1091  /* Make sure we save the guest FPU/Altivec/VSX state */
1092  kvmppc_giveup_ext(vcpu, MSR_FP);
1093  kvmppc_giveup_ext(vcpu, MSR_VEC);
1094  kvmppc_giveup_ext(vcpu, MSR_VSX);
1095 
1096  /* Restore FPU state from stack */
1097  memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
1098  current->thread.fpscr.val = fpscr;
1099  current->thread.fpexc_mode = fpexc_mode;
1100 
1101 #ifdef CONFIG_ALTIVEC
1102  /* Restore Altivec state from stack */
1103  if (used_vr && current->thread.used_vr) {
1104  memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
1105  current->thread.vscr = vscr;
1106  current->thread.vrsave = vrsave;
1107  }
1108  current->thread.used_vr = used_vr;
1109 #endif
1110 
1111 #ifdef CONFIG_VSX
1112  current->thread.used_vsr = used_vsr;
1113 #endif
1114 
1115 out:
1116  preempt_enable();
1117  return ret;
1118 }
1119 
1120 /*
1121  * Get (and clear) the dirty memory log for a memory slot.
1122  */
1123 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1124  struct kvm_dirty_log *log)
1125 {
1126  struct kvm_memory_slot *memslot;
1127  struct kvm_vcpu *vcpu;
1128  ulong ga, ga_end;
1129  int is_dirty = 0;
1130  int r;
1131  unsigned long n;
1132 
1133  mutex_lock(&kvm->slots_lock);
1134 
1135  r = kvm_get_dirty_log(kvm, log, &is_dirty);
1136  if (r)
1137  goto out;
1138 
1139  /* If nothing is dirty, don't bother messing with page tables. */
1140  if (is_dirty) {
1141  memslot = id_to_memslot(kvm->memslots, log->slot);
1142 
1143  ga = memslot->base_gfn << PAGE_SHIFT;
1144  ga_end = ga + (memslot->npages << PAGE_SHIFT);
1145 
1146  kvm_for_each_vcpu(n, vcpu, kvm)
1147  kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1148 
1149  n = kvm_dirty_bitmap_bytes(memslot);
1150  memset(memslot->dirty_bitmap, 0, n);
1151  }
1152 
1153  r = 0;
1154 out:
1155  mutex_unlock(&kvm->slots_lock);
1156  return r;
1157 }
1158 
1159 #ifdef CONFIG_PPC64
1160 int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm, struct kvm_ppc_smmu_info *info)
1161 {
1162  /* No flags */
1163  info->flags = 0;
1164 
1165  /* SLB is always 64 entries */
1166  info->slb_size = 64;
1167 
1168  /* Standard 4k base page size segment */
1169  info->sps[0].page_shift = 12;
1170  info->sps[0].slb_enc = 0;
1171  info->sps[0].enc[0].page_shift = 12;
1172  info->sps[0].enc[0].pte_enc = 0;
1173 
1174  /* Standard 16M large page size segment */
1175  info->sps[1].page_shift = 24;
1176  info->sps[1].slb_enc = SLB_VSID_L;
1177  info->sps[1].enc[0].page_shift = 24;
1178  info->sps[1].enc[0].pte_enc = 0;
1179 
1180  return 0;
1181 }
1182 #endif /* CONFIG_PPC64 */
1183 
1184 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1185  struct kvm_userspace_memory_region *mem)
1186 {
1187  return 0;
1188 }
1189 
1190 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1191  struct kvm_userspace_memory_region *mem)
1192 {
1193 }
1194 
1195 int kvmppc_core_init_vm(struct kvm *kvm)
1196 {
1197 #ifdef CONFIG_PPC64
1198  INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
1199 #endif
1200 
1201  return 0;
1202 }
1203 
1204 void kvmppc_core_destroy_vm(struct kvm *kvm)
1205 {
1206 #ifdef CONFIG_PPC64
1207  WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
1208 #endif
1209 }
1210 
1211 static int kvmppc_book3s_init(void)
1212 {
1213  int r;
1214 
1215  r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0,
1216  THIS_MODULE);
1217 
1218  if (r)
1219  return r;
1220 
1221  r = kvmppc_mmu_hpte_sysinit();
1222 
1223  return r;
1224 }
1225 
1226 static void kvmppc_book3s_exit(void)
1227 {
1228  kvmppc_mmu_hpte_sysexit();
1229  kvm_exit();
1230 }
1231 
1232 module_init(kvmppc_book3s_init);
1233 module_exit(kvmppc_book3s_exit);
Generated on Thu Jan 10 2013 13:14:08 for Linux Kernel by   doxygen 1.8.2