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