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KVM: PPC: Ignore unhalt request from kvm_vcpu_block
[linux-2.6-block.git] / arch / powerpc / kvm / book3s_pr.c
CommitLineData
f05ed4d5
PM		 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>
93087948 23#include <linux/export.h>
f05ed4d5
PM		 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>
95327d08 36#include <asm/switch_to.h>
f05ed4d5
PM		 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
47static 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
e371f713
AG		 55#define __hard_irq_disable local_irq_disable
56#define __hard_irq_enable local_irq_enable
f05ed4d5
PM		 57#endif
58
59void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
60{
61#ifdef CONFIG_PPC_BOOK3S_64
468a12c2
AG		 62 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
63 memcpy(svcpu->slb, to_book3s(vcpu)->slb_shadow, sizeof(svcpu->slb));
f05ed4d5
PM		 64 memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu,
65 sizeof(get_paca()->shadow_vcpu));
468a12c2
AG		 66 svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
67 svcpu_put(svcpu);
f05ed4d5
PM		 68#endif
69
70#ifdef CONFIG_PPC_BOOK3S_32
71 current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu;
72#endif
73}
74
75void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
76{
77#ifdef CONFIG_PPC_BOOK3S_64
468a12c2
AG		 78 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
79 memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
f05ed4d5
PM		 80 memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
81 sizeof(get_paca()->shadow_vcpu));
468a12c2
AG		 82 to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
83 svcpu_put(svcpu);
f05ed4d5
PM		 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
91static 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
108void 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);
966cd0f3 123 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
f05ed4d5
PM		 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 /* Preload FPU if it's enabled */
149 if (vcpu->arch.shared->msr & MSR_FP)
150 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
151}
152
153void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
154{
155 u32 host_pvr;
156
157 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
158 vcpu->arch.pvr = pvr;
159#ifdef CONFIG_PPC_BOOK3S_64
160 if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
161 kvmppc_mmu_book3s_64_init(vcpu);
1022fc3d
AG		 162 if (!to_book3s(vcpu)->hior_explicit)
163 to_book3s(vcpu)->hior = 0xfff00000;
f05ed4d5 164 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
af8f38b3 165 vcpu->arch.cpu_type = KVM_CPU_3S_64;
f05ed4d5
PM		 166 } else
167#endif
168 {
169 kvmppc_mmu_book3s_32_init(vcpu);
1022fc3d
AG		 170 if (!to_book3s(vcpu)->hior_explicit)
171 to_book3s(vcpu)->hior = 0;
f05ed4d5 172 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
af8f38b3 173 vcpu->arch.cpu_type = KVM_CPU_3S_32;
f05ed4d5
PM		 174 }
175
af8f38b3
AG		 176 kvmppc_sanity_check(vcpu);
177
f05ed4d5
PM		 178 /* If we are in hypervisor level on 970, we can tell the CPU to
179 * treat DCBZ as 32 bytes store */
180 vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
181 if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
182 !strcmp(cur_cpu_spec->platform, "ppc970"))
183 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
184
185 /* Cell performs badly if MSR_FEx are set. So let's hope nobody
186 really needs them in a VM on Cell and force disable them. */
187 if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
188 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
189
190#ifdef CONFIG_PPC_BOOK3S_32
191 /* 32 bit Book3S always has 32 byte dcbz */
192 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
193#endif
194
195 /* On some CPUs we can execute paired single operations natively */
196 asm ( "mfpvr %0" : "=r"(host_pvr));
197 switch (host_pvr) {
198 case 0x00080200: /* lonestar 2.0 */
199 case 0x00088202: /* lonestar 2.2 */
200 case 0x70000100: /* gekko 1.0 */
201 case 0x00080100: /* gekko 2.0 */
202 case 0x00083203: /* gekko 2.3a */
203 case 0x00083213: /* gekko 2.3b */
204 case 0x00083204: /* gekko 2.4 */
205 case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
206 case 0x00087200: /* broadway */
207 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
208 /* Enable HID2.PSE - in case we need it later */
209 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
210 }
211}
212
213/* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
214 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
215 * emulate 32 bytes dcbz length.
216 *
217 * The Book3s_64 inventors also realized this case and implemented a special bit
218 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
219 *
220 * My approach here is to patch the dcbz instruction on executing pages.
221 */
222static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
223{
224 struct page *hpage;
225 u64 hpage_offset;
226 u32 *page;
227 int i;
228
229 hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
230 if (is_error_page(hpage)) {
231 kvm_release_page_clean(hpage);
232 return;
233 }
234
235 hpage_offset = pte->raddr & ~PAGE_MASK;
236 hpage_offset &= ~0xFFFULL;
237 hpage_offset /= 4;
238
239 get_page(hpage);
2480b208 240 page = kmap_atomic(hpage);
f05ed4d5
PM		 241
242 /* patch dcbz into reserved instruction, so we trap */
243 for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
244 if ((page[i] & 0xff0007ff) == INS_DCBZ)
245 page[i] &= 0xfffffff7;
246
2480b208 247 kunmap_atomic(page);
f05ed4d5
PM		 248 put_page(hpage);
249}
250
251static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
252{
253 ulong mp_pa = vcpu->arch.magic_page_pa;
254
255 if (unlikely(mp_pa) &&
256 unlikely((mp_pa & KVM_PAM) >> PAGE_SHIFT == gfn)) {
257 return 1;
258 }
259
260 return kvm_is_visible_gfn(vcpu->kvm, gfn);
261}
262
263int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
264 ulong eaddr, int vec)
265{
266 bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
267 int r = RESUME_GUEST;
268 int relocated;
269 int page_found = 0;
270 struct kvmppc_pte pte;
271 bool is_mmio = false;
272 bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
273 bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
274 u64 vsid;
275
276 relocated = data ? dr : ir;
277
278 /* Resolve real address if translation turned on */
279 if (relocated) {
280 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
281 } else {
282 pte.may_execute = true;
283 pte.may_read = true;
284 pte.may_write = true;
285 pte.raddr = eaddr & KVM_PAM;
286 pte.eaddr = eaddr;
287 pte.vpage = eaddr >> 12;
288 }
289
290 switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
291 case 0:
292 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
293 break;
294 case MSR_DR:
295 case MSR_IR:
296 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
297
298 if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
299 pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
300 else
301 pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
302 pte.vpage |= vsid;
303
304 if (vsid == -1)
305 page_found = -EINVAL;
306 break;
307 }
308
309 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
310 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
311 /*
312 * If we do the dcbz hack, we have to NX on every execution,
313 * so we can patch the executing code. This renders our guest
314 * NX-less.
315 */
316 pte.may_execute = !data;
317 }
318
319 if (page_found == -ENOENT) {
320 /* Page not found in guest PTE entries */
468a12c2 321 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
f05ed4d5 322 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
468a12c2 323 vcpu->arch.shared->dsisr = svcpu->fault_dsisr;
f05ed4d5 324 vcpu->arch.shared->msr |=
468a12c2
AG		 325 (svcpu->shadow_srr1 & 0x00000000f8000000ULL);
326 svcpu_put(svcpu);
f05ed4d5
PM		 327 kvmppc_book3s_queue_irqprio(vcpu, vec);
328 } else if (page_found == -EPERM) {
329 /* Storage protection */
468a12c2 330 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
f05ed4d5 331 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
468a12c2 332 vcpu->arch.shared->dsisr = svcpu->fault_dsisr & ~DSISR_NOHPTE;
f05ed4d5
PM		 333 vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
334 vcpu->arch.shared->msr |=
468a12c2
AG		 335 svcpu->shadow_srr1 & 0x00000000f8000000ULL;
336 svcpu_put(svcpu);
f05ed4d5
PM		 337 kvmppc_book3s_queue_irqprio(vcpu, vec);
338 } else if (page_found == -EINVAL) {
339 /* Page not found in guest SLB */
340 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
341 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
342 } else if (!is_mmio &&
343 kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
344 /* The guest's PTE is not mapped yet. Map on the host */
345 kvmppc_mmu_map_page(vcpu, &pte);
346 if (data)
347 vcpu->stat.sp_storage++;
348 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
349 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
350 kvmppc_patch_dcbz(vcpu, &pte);
351 } else {
352 /* MMIO */
353 vcpu->stat.mmio_exits++;
354 vcpu->arch.paddr_accessed = pte.raddr;
6020c0f6 355 vcpu->arch.vaddr_accessed = pte.eaddr;
f05ed4d5
PM		 356 r = kvmppc_emulate_mmio(run, vcpu);
357 if ( r == RESUME_HOST_NV )
358 r = RESUME_HOST;
359 }
360
361 return r;
362}
363
364static inline int get_fpr_index(int i)
365{
366#ifdef CONFIG_VSX
367 i *= 2;
368#endif
369 return i;
370}
371
372/* Give up external provider (FPU, Altivec, VSX) */
373void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
374{
375 struct thread_struct *t = &current->thread;
376 u64 *vcpu_fpr = vcpu->arch.fpr;
377#ifdef CONFIG_VSX
378 u64 *vcpu_vsx = vcpu->arch.vsr;
379#endif
380 u64 *thread_fpr = (u64*)t->fpr;
381 int i;
382
383 if (!(vcpu->arch.guest_owned_ext & msr))
384 return;
385
386#ifdef DEBUG_EXT
387 printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
388#endif
389
390 switch (msr) {
391 case MSR_FP:
392 giveup_fpu(current);
393 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
394 vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];
395
396 vcpu->arch.fpscr = t->fpscr.val;
397 break;
398 case MSR_VEC:
399#ifdef CONFIG_ALTIVEC
400 giveup_altivec(current);
401 memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
402 vcpu->arch.vscr = t->vscr;
403#endif
404 break;
405 case MSR_VSX:
406#ifdef CONFIG_VSX
407 __giveup_vsx(current);
408 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
409 vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1];
410#endif
411 break;
412 default:
413 BUG();
414 }
415
416 vcpu->arch.guest_owned_ext &= ~msr;
417 current->thread.regs->msr &= ~msr;
418 kvmppc_recalc_shadow_msr(vcpu);
419}
420
421static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
422{
423 ulong srr0 = kvmppc_get_pc(vcpu);
424 u32 last_inst = kvmppc_get_last_inst(vcpu);
425 int ret;
426
427 ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
428 if (ret == -ENOENT) {
429 ulong msr = vcpu->arch.shared->msr;
430
431 msr = kvmppc_set_field(msr, 33, 33, 1);
432 msr = kvmppc_set_field(msr, 34, 36, 0);
433 vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
434 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
435 return EMULATE_AGAIN;
436 }
437
438 return EMULATE_DONE;
439}
440
441static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
442{
443
444 /* Need to do paired single emulation? */
445 if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
446 return EMULATE_DONE;
447
448 /* Read out the instruction */
449 if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
450 /* Need to emulate */
451 return EMULATE_FAIL;
452
453 return EMULATE_AGAIN;
454}
455
456/* Handle external providers (FPU, Altivec, VSX) */
457static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
458 ulong msr)
459{
460 struct thread_struct *t = &current->thread;
461 u64 *vcpu_fpr = vcpu->arch.fpr;
462#ifdef CONFIG_VSX
463 u64 *vcpu_vsx = vcpu->arch.vsr;
464#endif
465 u64 *thread_fpr = (u64*)t->fpr;
466 int i;
467
468 /* When we have paired singles, we emulate in software */
469 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
470 return RESUME_GUEST;
471
472 if (!(vcpu->arch.shared->msr & msr)) {
473 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
474 return RESUME_GUEST;
475 }
476
477 /* We already own the ext */
478 if (vcpu->arch.guest_owned_ext & msr) {
479 return RESUME_GUEST;
480 }
481
482#ifdef DEBUG_EXT
483 printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
484#endif
485
486 current->thread.regs->msr |= msr;
487
488 switch (msr) {
489 case MSR_FP:
490 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
491 thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];
492
493 t->fpscr.val = vcpu->arch.fpscr;
494 t->fpexc_mode = 0;
495 kvmppc_load_up_fpu();
496 break;
497 case MSR_VEC:
498#ifdef CONFIG_ALTIVEC
499 memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
500 t->vscr = vcpu->arch.vscr;
501 t->vrsave = -1;
502 kvmppc_load_up_altivec();
503#endif
504 break;
505 case MSR_VSX:
506#ifdef CONFIG_VSX
507 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
508 thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
509 kvmppc_load_up_vsx();
510#endif
511 break;
512 default:
513 BUG();
514 }
515
516 vcpu->arch.guest_owned_ext |= msr;
517
518 kvmppc_recalc_shadow_msr(vcpu);
519
520 return RESUME_GUEST;
521}
522
523int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
524 unsigned int exit_nr)
525{
526 int r = RESUME_HOST;
527
528 vcpu->stat.sum_exits++;
529
530 run->exit_reason = KVM_EXIT_UNKNOWN;
531 run->ready_for_interrupt_injection = 1;
532
533 trace_kvm_book3s_exit(exit_nr, vcpu);
7d82714d 534 preempt_enable();
f05ed4d5
PM		 535 kvm_resched(vcpu);
536 switch (exit_nr) {
537 case BOOK3S_INTERRUPT_INST_STORAGE:
468a12c2
AG		 538 {
539 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
540 ulong shadow_srr1 = svcpu->shadow_srr1;
f05ed4d5
PM		 541 vcpu->stat.pf_instruc++;
542
543#ifdef CONFIG_PPC_BOOK3S_32
544 /* We set segments as unused segments when invalidating them. So
545 * treat the respective fault as segment fault. */
468a12c2 546 if (svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT] == SR_INVALID) {
f05ed4d5
PM		 547 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
548 r = RESUME_GUEST;
468a12c2 549 svcpu_put(svcpu);
f05ed4d5
PM		 550 break;
551 }
552#endif
468a12c2 553 svcpu_put(svcpu);
f05ed4d5
PM		 554
555 /* only care about PTEG not found errors, but leave NX alone */
468a12c2 556 if (shadow_srr1 & 0x40000000) {
f05ed4d5
PM		 557 r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
558 vcpu->stat.sp_instruc++;
559 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
560 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
561 /*
562 * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
563 * so we can't use the NX bit inside the guest. Let's cross our fingers,
564 * that no guest that needs the dcbz hack does NX.
565 */
566 kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
567 r = RESUME_GUEST;
568 } else {
468a12c2 569 vcpu->arch.shared->msr |= shadow_srr1 & 0x58000000;
f05ed4d5
PM		 570 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
571 r = RESUME_GUEST;
572 }
573 break;
468a12c2 574 }
f05ed4d5
PM		 575 case BOOK3S_INTERRUPT_DATA_STORAGE:
576 {
577 ulong dar = kvmppc_get_fault_dar(vcpu);
468a12c2
AG		 578 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
579 u32 fault_dsisr = svcpu->fault_dsisr;
f05ed4d5
PM		 580 vcpu->stat.pf_storage++;
581
582#ifdef CONFIG_PPC_BOOK3S_32
583 /* We set segments as unused segments when invalidating them. So
584 * treat the respective fault as segment fault. */
468a12c2 585 if ((svcpu->sr[dar >> SID_SHIFT]) == SR_INVALID) {
f05ed4d5
PM		 586 kvmppc_mmu_map_segment(vcpu, dar);
587 r = RESUME_GUEST;
468a12c2 588 svcpu_put(svcpu);
f05ed4d5
PM		 589 break;
590 }
591#endif
468a12c2 592 svcpu_put(svcpu);
f05ed4d5
PM		 593
594 /* The only case we need to handle is missing shadow PTEs */
468a12c2 595 if (fault_dsisr & DSISR_NOHPTE) {
f05ed4d5
PM		 596 r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
597 } else {
598 vcpu->arch.shared->dar = dar;
468a12c2 599 vcpu->arch.shared->dsisr = fault_dsisr;
f05ed4d5
PM		 600 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
601 r = RESUME_GUEST;
602 }
603 break;
604 }
605 case BOOK3S_INTERRUPT_DATA_SEGMENT:
606 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
607 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
608 kvmppc_book3s_queue_irqprio(vcpu,
609 BOOK3S_INTERRUPT_DATA_SEGMENT);
610 }
611 r = RESUME_GUEST;
612 break;
613 case BOOK3S_INTERRUPT_INST_SEGMENT:
614 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
615 kvmppc_book3s_queue_irqprio(vcpu,
616 BOOK3S_INTERRUPT_INST_SEGMENT);
617 }
618 r = RESUME_GUEST;
619 break;
620 /* We're good on these - the host merely wanted to get our attention */
621 case BOOK3S_INTERRUPT_DECREMENTER:
4f225ae0 622 case BOOK3S_INTERRUPT_HV_DECREMENTER:
f05ed4d5
PM		 623 vcpu->stat.dec_exits++;
624 r = RESUME_GUEST;
625 break;
626 case BOOK3S_INTERRUPT_EXTERNAL:
4f225ae0
AG		 627 case BOOK3S_INTERRUPT_EXTERNAL_LEVEL:
628 case BOOK3S_INTERRUPT_EXTERNAL_HV:
f05ed4d5
PM		 629 vcpu->stat.ext_intr_exits++;
630 r = RESUME_GUEST;
631 break;
632 case BOOK3S_INTERRUPT_PERFMON:
633 r = RESUME_GUEST;
634 break;
635 case BOOK3S_INTERRUPT_PROGRAM:
4f225ae0 636 case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
f05ed4d5
PM		 637 {
638 enum emulation_result er;
468a12c2 639 struct kvmppc_book3s_shadow_vcpu *svcpu;
f05ed4d5
PM		 640 ulong flags;
641
642program_interrupt:
468a12c2
AG		 643 svcpu = svcpu_get(vcpu);
644 flags = svcpu->shadow_srr1 & 0x1f0000ull;
645 svcpu_put(svcpu);
f05ed4d5
PM		 646
647 if (vcpu->arch.shared->msr & MSR_PR) {
648#ifdef EXIT_DEBUG
649 printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
650#endif
651 if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
652 (INS_DCBZ & 0xfffffff7)) {
653 kvmppc_core_queue_program(vcpu, flags);
654 r = RESUME_GUEST;
655 break;
656 }
657 }
658
659 vcpu->stat.emulated_inst_exits++;
660 er = kvmppc_emulate_instruction(run, vcpu);
661 switch (er) {
662 case EMULATE_DONE:
663 r = RESUME_GUEST_NV;
664 break;
665 case EMULATE_AGAIN:
666 r = RESUME_GUEST;
667 break;
668 case EMULATE_FAIL:
669 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
670 __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
671 kvmppc_core_queue_program(vcpu, flags);
672 r = RESUME_GUEST;
673 break;
674 case EMULATE_DO_MMIO:
675 run->exit_reason = KVM_EXIT_MMIO;
676 r = RESUME_HOST_NV;
677 break;
678 default:
679 BUG();
680 }
681 break;
682 }
683 case BOOK3S_INTERRUPT_SYSCALL:
a668f2bd
AG		 684 if (vcpu->arch.papr_enabled &&
685 (kvmppc_get_last_inst(vcpu) == 0x44000022) &&
686 !(vcpu->arch.shared->msr & MSR_PR)) {
687 /* SC 1 papr hypercalls */
688 ulong cmd = kvmppc_get_gpr(vcpu, 3);
689 int i;
690
96f38d72 691#ifdef CONFIG_KVM_BOOK3S_64_PR
a668f2bd
AG		 692 if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
693 r = RESUME_GUEST;
694 break;
695 }
96f38d72 696#endif
a668f2bd
AG		 697
698 run->papr_hcall.nr = cmd;
699 for (i = 0; i < 9; ++i) {
700 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
701 run->papr_hcall.args[i] = gpr;
702 }
703 run->exit_reason = KVM_EXIT_PAPR_HCALL;
704 vcpu->arch.hcall_needed = 1;
705 r = RESUME_HOST;
706 } else if (vcpu->arch.osi_enabled &&
f05ed4d5
PM		 707 (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
708 (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
709 /* MOL hypercalls */
710 u64 *gprs = run->osi.gprs;
711 int i;
712
713 run->exit_reason = KVM_EXIT_OSI;
714 for (i = 0; i < 32; i++)
715 gprs[i] = kvmppc_get_gpr(vcpu, i);
716 vcpu->arch.osi_needed = 1;
717 r = RESUME_HOST_NV;
718 } else if (!(vcpu->arch.shared->msr & MSR_PR) &&
719 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
720 /* KVM PV hypercalls */
721 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
722 r = RESUME_GUEST;
723 } else {
724 /* Guest syscalls */
725 vcpu->stat.syscall_exits++;
726 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
727 r = RESUME_GUEST;
728 }
729 break;
730 case BOOK3S_INTERRUPT_FP_UNAVAIL:
731 case BOOK3S_INTERRUPT_ALTIVEC:
732 case BOOK3S_INTERRUPT_VSX:
733 {
734 int ext_msr = 0;
735
736 switch (exit_nr) {
737 case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP; break;
738 case BOOK3S_INTERRUPT_ALTIVEC: ext_msr = MSR_VEC; break;
739 case BOOK3S_INTERRUPT_VSX: ext_msr = MSR_VSX; break;
740 }
741
742 switch (kvmppc_check_ext(vcpu, exit_nr)) {
743 case EMULATE_DONE:
744 /* everything ok - let's enable the ext */
745 r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
746 break;
747 case EMULATE_FAIL:
748 /* we need to emulate this instruction */
749 goto program_interrupt;
750 break;
751 default:
752 /* nothing to worry about - go again */
753 break;
754 }
755 break;
756 }
757 case BOOK3S_INTERRUPT_ALIGNMENT:
758 if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
759 vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
760 kvmppc_get_last_inst(vcpu));
761 vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
762 kvmppc_get_last_inst(vcpu));
763 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
764 }
765 r = RESUME_GUEST;
766 break;
767 case BOOK3S_INTERRUPT_MACHINE_CHECK:
768 case BOOK3S_INTERRUPT_TRACE:
769 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
770 r = RESUME_GUEST;
771 break;
772 default:
468a12c2
AG		 773 {
774 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
775 ulong shadow_srr1 = svcpu->shadow_srr1;
776 svcpu_put(svcpu);
f05ed4d5
PM		 777 /* Ugh - bork here! What did we get? */
778 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
468a12c2 779 exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
f05ed4d5
PM		 780 r = RESUME_HOST;
781 BUG();
782 break;
783 }
468a12c2 784 }
f05ed4d5 785
592f5d87 786 preempt_disable();
f05ed4d5
PM		 787 if (!(r & RESUME_HOST)) {
788 /* To avoid clobbering exit_reason, only check for signals if
789 * we aren't already exiting to userspace for some other
790 * reason. */
e371f713
AG		 791
792 /*
793 * Interrupts could be timers for the guest which we have to
794 * inject again, so let's postpone them until we're in the guest
795 * and if we really did time things so badly, then we just exit
796 * again due to a host external interrupt.
797 */
798 __hard_irq_disable();
f05ed4d5 799 if (signal_pending(current)) {
e371f713 800 __hard_irq_enable();
f05ed4d5
PM		 801#ifdef EXIT_DEBUG
802 printk(KERN_EMERG "KVM: Going back to host\n");
803#endif
804 vcpu->stat.signal_exits++;
805 run->exit_reason = KVM_EXIT_INTR;
806 r = -EINTR;
807 } else {
808 /* In case an interrupt came in that was triggered
809 * from userspace (like DEC), we need to check what
810 * to inject now! */
7e28e60e 811 kvmppc_core_prepare_to_enter(vcpu);
f05ed4d5
PM		 812 }
813 }
814
815 trace_kvm_book3s_reenter(r, vcpu);
816
817 return r;
818}
819
820int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
821 struct kvm_sregs *sregs)
822{
823 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
824 int i;
825
826 sregs->pvr = vcpu->arch.pvr;
827
828 sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
829 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
830 for (i = 0; i < 64; i++) {
831 sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
832 sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
833 }
834 } else {
835 for (i = 0; i < 16; i++)
836 sregs->u.s.ppc32.sr[i] = vcpu->arch.shared->sr[i];
837
838 for (i = 0; i < 8; i++) {
839 sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
840 sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
841 }
842 }
843
844 return 0;
845}
846
847int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
848 struct kvm_sregs *sregs)
849{
850 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
851 int i;
852
853 kvmppc_set_pvr(vcpu, sregs->pvr);
854
855 vcpu3s->sdr1 = sregs->u.s.sdr1;
856 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
857 for (i = 0; i < 64; i++) {
858 vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
859 sregs->u.s.ppc64.slb[i].slbe);
860 }
861 } else {
862 for (i = 0; i < 16; i++) {
863 vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
864 }
865 for (i = 0; i < 8; i++) {
866 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
867 (u32)sregs->u.s.ppc32.ibat[i]);
868 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
869 (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
870 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
871 (u32)sregs->u.s.ppc32.dbat[i]);
872 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
873 (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
874 }
875 }
876
877 /* Flush the MMU after messing with the segments */
878 kvmppc_mmu_pte_flush(vcpu, 0, 0);
879
880 return 0;
881}
882
31f3438e
PM		 883int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
884{
885 int r = -EINVAL;
886
887 switch (reg->id) {
888 case KVM_REG_PPC_HIOR:
b8e6f8ae
AG		 889 r = copy_to_user((u64 __user *)(long)reg->addr,
890 &to_book3s(vcpu)->hior, sizeof(u64));
31f3438e
PM		 891 break;
892 default:
893 break;
894 }
895
896 return r;
897}
898
899int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
900{
901 int r = -EINVAL;
902
903 switch (reg->id) {
904 case KVM_REG_PPC_HIOR:
b8e6f8ae
AG		 905 r = copy_from_user(&to_book3s(vcpu)->hior,
906 (u64 __user *)(long)reg->addr, sizeof(u64));
31f3438e
PM		 907 if (!r)
908 to_book3s(vcpu)->hior_explicit = true;
909 break;
910 default:
911 break;
912 }
913
914 return r;
915}
916
f05ed4d5
PM		 917int kvmppc_core_check_processor_compat(void)
918{
919 return 0;
920}
921
922struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
923{
924 struct kvmppc_vcpu_book3s *vcpu_book3s;
925 struct kvm_vcpu *vcpu;
926 int err = -ENOMEM;
927 unsigned long p;
928
929 vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
930 if (!vcpu_book3s)
931 goto out;
932
933 vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *)
934 kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
935 if (!vcpu_book3s->shadow_vcpu)
936 goto free_vcpu;
937
938 vcpu = &vcpu_book3s->vcpu;
939 err = kvm_vcpu_init(vcpu, kvm, id);
940 if (err)
941 goto free_shadow_vcpu;
942
943 p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
944 /* the real shared page fills the last 4k of our page */
945 vcpu->arch.shared = (void*)(p + PAGE_SIZE - 4096);
946 if (!p)
947 goto uninit_vcpu;
948
f05ed4d5
PM		 949#ifdef CONFIG_PPC_BOOK3S_64
950 /* default to book3s_64 (970fx) */
951 vcpu->arch.pvr = 0x3C0301;
952#else
953 /* default to book3s_32 (750) */
954 vcpu->arch.pvr = 0x84202;
955#endif
956 kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
957 vcpu->arch.slb_nr = 64;
958
f05ed4d5
PM		 959 vcpu->arch.shadow_msr = MSR_USER64;
960
961 err = kvmppc_mmu_init(vcpu);
962 if (err < 0)
963 goto uninit_vcpu;
964
965 return vcpu;
966
967uninit_vcpu:
968 kvm_vcpu_uninit(vcpu);
969free_shadow_vcpu:
970 kfree(vcpu_book3s->shadow_vcpu);
971free_vcpu:
972 vfree(vcpu_book3s);
973out:
974 return ERR_PTR(err);
975}
976
977void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
978{
979 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
980
981 free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
982 kvm_vcpu_uninit(vcpu);
983 kfree(vcpu_book3s->shadow_vcpu);
984 vfree(vcpu_book3s);
985}
986
df6909e5 987int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
f05ed4d5
PM		 988{
989 int ret;
990 double fpr[32][TS_FPRWIDTH];
991 unsigned int fpscr;
992 int fpexc_mode;
993#ifdef CONFIG_ALTIVEC
994 vector128 vr[32];
995 vector128 vscr;
996 unsigned long uninitialized_var(vrsave);
997 int used_vr;
998#endif
999#ifdef CONFIG_VSX
1000 int used_vsr;
1001#endif
1002 ulong ext_msr;
1003
7d82714d
AG		 1004 preempt_disable();
1005
af8f38b3
AG		 1006 /* Check if we can run the vcpu at all */
1007 if (!vcpu->arch.sane) {
1008 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
7d82714d
AG		 1009 ret = -EINVAL;
1010 goto out;
af8f38b3
AG		 1011 }
1012
25051b5a
SW		 1013 kvmppc_core_prepare_to_enter(vcpu);
1014
e371f713
AG		 1015 /*
1016 * Interrupts could be timers for the guest which we have to inject
1017 * again, so let's postpone them until we're in the guest and if we
1018 * really did time things so badly, then we just exit again due to
1019 * a host external interrupt.
1020 */
1021 __hard_irq_disable();
1022
f05ed4d5
PM		 1023 /* No need to go into the guest when all we do is going out */
1024 if (signal_pending(current)) {
e371f713 1025 __hard_irq_enable();
f05ed4d5 1026 kvm_run->exit_reason = KVM_EXIT_INTR;
7d82714d
AG		 1027 ret = -EINTR;
1028 goto out;
f05ed4d5
PM		 1029 }
1030
1031 /* Save FPU state in stack */
1032 if (current->thread.regs->msr & MSR_FP)
1033 giveup_fpu(current);
1034 memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
1035 fpscr = current->thread.fpscr.val;
1036 fpexc_mode = current->thread.fpexc_mode;
1037
1038#ifdef CONFIG_ALTIVEC
1039 /* Save Altivec state in stack */
1040 used_vr = current->thread.used_vr;
1041 if (used_vr) {
1042 if (current->thread.regs->msr & MSR_VEC)
1043 giveup_altivec(current);
1044 memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
1045 vscr = current->thread.vscr;
1046 vrsave = current->thread.vrsave;
1047 }
1048#endif
1049
1050#ifdef CONFIG_VSX
1051 /* Save VSX state in stack */
1052 used_vsr = current->thread.used_vsr;
1053 if (used_vsr && (current->thread.regs->msr & MSR_VSX))
1054 __giveup_vsx(current);
1055#endif
1056
1057 /* Remember the MSR with disabled extensions */
1058 ext_msr = current->thread.regs->msr;
1059
f05ed4d5
PM		 1060 /* Preload FPU if it's enabled */
1061 if (vcpu->arch.shared->msr & MSR_FP)
1062 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1063
df6909e5
PM		 1064 kvm_guest_enter();
1065
1066 ret = __kvmppc_vcpu_run(kvm_run, vcpu);
1067
1068 kvm_guest_exit();
f05ed4d5 1069
f05ed4d5
PM		 1070 current->thread.regs->msr = ext_msr;
1071
1072 /* Make sure we save the guest FPU/Altivec/VSX state */
1073 kvmppc_giveup_ext(vcpu, MSR_FP);
1074 kvmppc_giveup_ext(vcpu, MSR_VEC);
1075 kvmppc_giveup_ext(vcpu, MSR_VSX);
1076
1077 /* Restore FPU state from stack */
1078 memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
1079 current->thread.fpscr.val = fpscr;
1080 current->thread.fpexc_mode = fpexc_mode;
1081
1082#ifdef CONFIG_ALTIVEC
1083 /* Restore Altivec state from stack */
1084 if (used_vr && current->thread.used_vr) {
1085 memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
1086 current->thread.vscr = vscr;
1087 current->thread.vrsave = vrsave;
1088 }
1089 current->thread.used_vr = used_vr;
1090#endif
1091
1092#ifdef CONFIG_VSX
1093 current->thread.used_vsr = used_vsr;
1094#endif
1095
7d82714d
AG		 1096out:
1097 preempt_enable();
f05ed4d5
PM		 1098 return ret;
1099}
1100
82ed3616
PM		 1101/*
1102 * Get (and clear) the dirty memory log for a memory slot.
1103 */
1104int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1105 struct kvm_dirty_log *log)
1106{
1107 struct kvm_memory_slot *memslot;
1108 struct kvm_vcpu *vcpu;
1109 ulong ga, ga_end;
1110 int is_dirty = 0;
1111 int r;
1112 unsigned long n;
1113
1114 mutex_lock(&kvm->slots_lock);
1115
1116 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1117 if (r)
1118 goto out;
1119
1120 /* If nothing is dirty, don't bother messing with page tables. */
1121 if (is_dirty) {
1122 memslot = id_to_memslot(kvm->memslots, log->slot);
1123
1124 ga = memslot->base_gfn << PAGE_SHIFT;
1125 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1126
1127 kvm_for_each_vcpu(n, vcpu, kvm)
1128 kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1129
1130 n = kvm_dirty_bitmap_bytes(memslot);
1131 memset(memslot->dirty_bitmap, 0, n);
1132 }
1133
1134 r = 0;
1135out:
1136 mutex_unlock(&kvm->slots_lock);
1137 return r;
1138}
1139
f9e0554d
PM		 1140int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1141 struct kvm_userspace_memory_region *mem)
1142{
1143 return 0;
1144}
1145
1146void kvmppc_core_commit_memory_region(struct kvm *kvm,
1147 struct kvm_userspace_memory_region *mem)
1148{
1149}
1150
1151int kvmppc_core_init_vm(struct kvm *kvm)
1152{
1153 return 0;
1154}
1155
1156void kvmppc_core_destroy_vm(struct kvm *kvm)
1157{
1158}
1159
f05ed4d5
PM		 1160static int kvmppc_book3s_init(void)
1161{
1162 int r;
1163
1164 r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0,
1165 THIS_MODULE);
1166
1167 if (r)
1168 return r;
1169
1170 r = kvmppc_mmu_hpte_sysinit();
1171
1172 return r;
1173}
1174
1175static void kvmppc_book3s_exit(void)
1176{
1177 kvmppc_mmu_hpte_sysexit();
1178 kvm_exit();
1179}
1180
1181module_init(kvmppc_book3s_init);
1182module_exit(kvmppc_book3s_exit);
Linux 6.x block layer and io_uring tree(s)