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kvm tools, setup: Create private directory
[linux-2.6/next.git] / arch / powerpc / kvm / book3s.c
blob0f95b5cce033026ff5e9e02e0357d91c4cdefd7e
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 *
8 * Description:
9 * This file is derived from arch/powerpc/kvm/44x.c,
10 * by Hollis Blanchard <hollisb@us.ibm.com>.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License, version 2, as
14 * published by the Free Software Foundation.
15 */
16
17 #include <linux/kvm_host.h>
18 #include <linux/err.h>
19 #include <linux/slab.h>
20 #include "trace.h"
21
22 #include <asm/reg.h>
23 #include <asm/cputable.h>
24 #include <asm/cacheflush.h>
25 #include <asm/tlbflush.h>
26 #include <asm/uaccess.h>
27 #include <asm/io.h>
28 #include <asm/kvm_ppc.h>
29 #include <asm/kvm_book3s.h>
30 #include <asm/mmu_context.h>
31 #include <linux/gfp.h>
32 #include <linux/sched.h>
33 #include <linux/vmalloc.h>
34 #include <linux/highmem.h>
35
36 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
37
38 /* #define EXIT_DEBUG */
39 /* #define DEBUG_EXT */
40
41 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
42 ulong msr);
43
44 /* Some compatibility defines */
45 #ifdef CONFIG_PPC_BOOK3S_32
46 #define MSR_USER32 MSR_USER
47 #define MSR_USER64 MSR_USER
48 #define HW_PAGE_SIZE PAGE_SIZE
49 #endif
50
51 struct kvm_stats_debugfs_item debugfs_entries[] = {
52 { "exits", VCPU_STAT(sum_exits) },
53 { "mmio", VCPU_STAT(mmio_exits) },
54 { "sig", VCPU_STAT(signal_exits) },
55 { "sysc", VCPU_STAT(syscall_exits) },
56 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
57 { "dec", VCPU_STAT(dec_exits) },
58 { "ext_intr", VCPU_STAT(ext_intr_exits) },
59 { "queue_intr", VCPU_STAT(queue_intr) },
60 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
61 { "pf_storage", VCPU_STAT(pf_storage) },
62 { "sp_storage", VCPU_STAT(sp_storage) },
63 { "pf_instruc", VCPU_STAT(pf_instruc) },
64 { "sp_instruc", VCPU_STAT(sp_instruc) },
65 { "ld", VCPU_STAT(ld) },
66 { "ld_slow", VCPU_STAT(ld_slow) },
67 { "st", VCPU_STAT(st) },
68 { "st_slow", VCPU_STAT(st_slow) },
69 { NULL }
70 };
71
72 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
73 {
74 }
75
76 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
77 {
78 }
79
80 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
81 {
82 #ifdef CONFIG_PPC_BOOK3S_64
83 memcpy(to_svcpu(vcpu)->slb, to_book3s(vcpu)->slb_shadow, sizeof(to_svcpu(vcpu)->slb));
84 memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu,
85 sizeof(get_paca()->shadow_vcpu));
86 to_svcpu(vcpu)->slb_max = to_book3s(vcpu)->slb_shadow_max;
87 #endif
88
89 #ifdef CONFIG_PPC_BOOK3S_32
90 current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu;
91 #endif
92 }
93
94 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
95 {
96 #ifdef CONFIG_PPC_BOOK3S_64
97 memcpy(to_book3s(vcpu)->slb_shadow, to_svcpu(vcpu)->slb, sizeof(to_svcpu(vcpu)->slb));
98 memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
99 sizeof(get_paca()->shadow_vcpu));
100 to_book3s(vcpu)->slb_shadow_max = to_svcpu(vcpu)->slb_max;
101 #endif
102
103 kvmppc_giveup_ext(vcpu, MSR_FP);
104 kvmppc_giveup_ext(vcpu, MSR_VEC);
105 kvmppc_giveup_ext(vcpu, MSR_VSX);
106 }
107
108 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
109 {
110 ulong smsr = vcpu->arch.shared->msr;
111
112 /* Guest MSR values */
113 smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_DE;
114 /* Process MSR values */
115 smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
116 /* External providers the guest reserved */
117 smsr |= (vcpu->arch.shared->msr & vcpu->arch.guest_owned_ext);
118 /* 64-bit Process MSR values */
119 #ifdef CONFIG_PPC_BOOK3S_64
120 smsr |= MSR_ISF | MSR_HV;
121 #endif
122 vcpu->arch.shadow_msr = smsr;
123 }
124
125 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
126 {
127 ulong old_msr = vcpu->arch.shared->msr;
128
129 #ifdef EXIT_DEBUG
130 printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
131 #endif
132
133 msr &= to_book3s(vcpu)->msr_mask;
134 vcpu->arch.shared->msr = msr;
135 kvmppc_recalc_shadow_msr(vcpu);
136
137 if (msr & MSR_POW) {
138 if (!vcpu->arch.pending_exceptions) {
139 kvm_vcpu_block(vcpu);
140 vcpu->stat.halt_wakeup++;
141
142 /* Unset POW bit after we woke up */
143 msr &= ~MSR_POW;
144 vcpu->arch.shared->msr = msr;
145 }
146 }
147
148 if ((vcpu->arch.shared->msr & (MSR_PR|MSR_IR|MSR_DR)) !=
149 (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
150 kvmppc_mmu_flush_segments(vcpu);
151 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
152
153 /* Preload magic page segment when in kernel mode */
154 if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
155 struct kvm_vcpu_arch *a = &vcpu->arch;
156
157 if (msr & MSR_DR)
158 kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
159 else
160 kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
161 }
162 }
163
164 /* Preload FPU if it's enabled */
165 if (vcpu->arch.shared->msr & MSR_FP)
166 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
167 }
168
169 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
170 {
171 vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu);
172 vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags;
173 kvmppc_set_pc(vcpu, to_book3s(vcpu)->hior + vec);
174 vcpu->arch.mmu.reset_msr(vcpu);
175 }
176
177 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
178 {
179 unsigned int prio;
180
181 switch (vec) {
182 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
183 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
184 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
185 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
186 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
187 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
188 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
189 case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL; break;
190 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
191 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
192 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
193 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
194 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
195 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
196 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
197 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
198 default: prio = BOOK3S_IRQPRIO_MAX; break;
199 }
200
201 return prio;
202 }
203
204 static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
205 unsigned int vec)
206 {
207 clear_bit(kvmppc_book3s_vec2irqprio(vec),
208 &vcpu->arch.pending_exceptions);
209
210 if (!vcpu->arch.pending_exceptions)
211 vcpu->arch.shared->int_pending = 0;
212 }
213
214 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
215 {
216 vcpu->stat.queue_intr++;
217
218 set_bit(kvmppc_book3s_vec2irqprio(vec),
219 &vcpu->arch.pending_exceptions);
220 #ifdef EXIT_DEBUG
221 printk(KERN_INFO "Queueing interrupt %x\n", vec);
222 #endif
223 }
224
225
226 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
227 {
228 to_book3s(vcpu)->prog_flags = flags;
229 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM);
230 }
231
232 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
233 {
234 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
235 }
236
237 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
238 {
239 return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
240 }
241
242 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
243 {
244 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
245 }
246
247 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
248 struct kvm_interrupt *irq)
249 {
250 unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
251
252 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
253 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
254
255 kvmppc_book3s_queue_irqprio(vcpu, vec);
256 }
257
258 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
259 struct kvm_interrupt *irq)
260 {
261 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
262 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
263 }
264
265 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
266 {
267 int deliver = 1;
268 int vec = 0;
269 ulong flags = 0ULL;
270 ulong crit_raw = vcpu->arch.shared->critical;
271 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
272 bool crit;
273
274 /* Truncate crit indicators in 32 bit mode */
275 if (!(vcpu->arch.shared->msr & MSR_SF)) {
276 crit_raw &= 0xffffffff;
277 crit_r1 &= 0xffffffff;
278 }
279
280 /* Critical section when crit == r1 */
281 crit = (crit_raw == crit_r1);
282 /* ... and we're in supervisor mode */
283 crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
284
285 switch (priority) {
286 case BOOK3S_IRQPRIO_DECREMENTER:
287 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
288 vec = BOOK3S_INTERRUPT_DECREMENTER;
289 break;
290 case BOOK3S_IRQPRIO_EXTERNAL:
291 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
292 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
293 vec = BOOK3S_INTERRUPT_EXTERNAL;
294 break;
295 case BOOK3S_IRQPRIO_SYSTEM_RESET:
296 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
297 break;
298 case BOOK3S_IRQPRIO_MACHINE_CHECK:
299 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
300 break;
301 case BOOK3S_IRQPRIO_DATA_STORAGE:
302 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
303 break;
304 case BOOK3S_IRQPRIO_INST_STORAGE:
305 vec = BOOK3S_INTERRUPT_INST_STORAGE;
306 break;
307 case BOOK3S_IRQPRIO_DATA_SEGMENT:
308 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
309 break;
310 case BOOK3S_IRQPRIO_INST_SEGMENT:
311 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
312 break;
313 case BOOK3S_IRQPRIO_ALIGNMENT:
314 vec = BOOK3S_INTERRUPT_ALIGNMENT;
315 break;
316 case BOOK3S_IRQPRIO_PROGRAM:
317 vec = BOOK3S_INTERRUPT_PROGRAM;
318 flags = to_book3s(vcpu)->prog_flags;
319 break;
320 case BOOK3S_IRQPRIO_VSX:
321 vec = BOOK3S_INTERRUPT_VSX;
322 break;
323 case BOOK3S_IRQPRIO_ALTIVEC:
324 vec = BOOK3S_INTERRUPT_ALTIVEC;
325 break;
326 case BOOK3S_IRQPRIO_FP_UNAVAIL:
327 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
328 break;
329 case BOOK3S_IRQPRIO_SYSCALL:
330 vec = BOOK3S_INTERRUPT_SYSCALL;
331 break;
332 case BOOK3S_IRQPRIO_DEBUG:
333 vec = BOOK3S_INTERRUPT_TRACE;
334 break;
335 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
336 vec = BOOK3S_INTERRUPT_PERFMON;
337 break;
338 default:
339 deliver = 0;
340 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
341 break;
342 }
343
344 #if 0
345 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
346 #endif
347
348 if (deliver)
349 kvmppc_inject_interrupt(vcpu, vec, flags);
350
351 return deliver;
352 }
353
354 /*
355 * This function determines if an irqprio should be cleared once issued.
356 */
357 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
358 {
359 switch (priority) {
360 case BOOK3S_IRQPRIO_DECREMENTER:
361 /* DEC interrupts get cleared by mtdec */
362 return false;
363 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
364 /* External interrupts get cleared by userspace */
365 return false;
366 }
367
368 return true;
369 }
370
371 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
372 {
373 unsigned long *pending = &vcpu->arch.pending_exceptions;
374 unsigned long old_pending = vcpu->arch.pending_exceptions;
375 unsigned int priority;
376
377 #ifdef EXIT_DEBUG
378 if (vcpu->arch.pending_exceptions)
379 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
380 #endif
381 priority = __ffs(*pending);
382 while (priority < BOOK3S_IRQPRIO_MAX) {
383 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
384 clear_irqprio(vcpu, priority)) {
385 clear_bit(priority, &vcpu->arch.pending_exceptions);
386 break;
387 }
388
389 priority = find_next_bit(pending,
390 BITS_PER_BYTE * sizeof(*pending),
391 priority + 1);
392 }
393
394 /* Tell the guest about our interrupt status */
395 if (*pending)
396 vcpu->arch.shared->int_pending = 1;
397 else if (old_pending)
398 vcpu->arch.shared->int_pending = 0;
399 }
400
401 void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
402 {
403 u32 host_pvr;
404
405 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
406 vcpu->arch.pvr = pvr;
407 #ifdef CONFIG_PPC_BOOK3S_64
408 if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
409 kvmppc_mmu_book3s_64_init(vcpu);
410 to_book3s(vcpu)->hior = 0xfff00000;
411 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
412 } else
413 #endif
414 {
415 kvmppc_mmu_book3s_32_init(vcpu);
416 to_book3s(vcpu)->hior = 0;
417 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
418 }
419
420 /* If we are in hypervisor level on 970, we can tell the CPU to
421 * treat DCBZ as 32 bytes store */
422 vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
423 if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
424 !strcmp(cur_cpu_spec->platform, "ppc970"))
425 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
426
427 /* Cell performs badly if MSR_FEx are set. So let's hope nobody
428 really needs them in a VM on Cell and force disable them. */
429 if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
430 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
431
432 #ifdef CONFIG_PPC_BOOK3S_32
433 /* 32 bit Book3S always has 32 byte dcbz */
434 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
435 #endif
436
437 /* On some CPUs we can execute paired single operations natively */
438 asm ( "mfpvr %0" : "=r"(host_pvr));
439 switch (host_pvr) {
440 case 0x00080200: /* lonestar 2.0 */
441 case 0x00088202: /* lonestar 2.2 */
442 case 0x70000100: /* gekko 1.0 */
443 case 0x00080100: /* gekko 2.0 */
444 case 0x00083203: /* gekko 2.3a */
445 case 0x00083213: /* gekko 2.3b */
446 case 0x00083204: /* gekko 2.4 */
447 case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
448 case 0x00087200: /* broadway */
449 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
450 /* Enable HID2.PSE - in case we need it later */
451 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
452 }
453 }
454
455 pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn)
456 {
457 ulong mp_pa = vcpu->arch.magic_page_pa;
458
459 /* Magic page override */
460 if (unlikely(mp_pa) &&
461 unlikely(((gfn << PAGE_SHIFT) & KVM_PAM) ==
462 ((mp_pa & PAGE_MASK) & KVM_PAM))) {
463 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
464 pfn_t pfn;
465
466 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
467 get_page(pfn_to_page(pfn));
468 return pfn;
469 }
470
471 return gfn_to_pfn(vcpu->kvm, gfn);
472 }
473
474 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
475 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
476 * emulate 32 bytes dcbz length.
477 *
478 * The Book3s_64 inventors also realized this case and implemented a special bit
479 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
480 *
481 * My approach here is to patch the dcbz instruction on executing pages.
482 */
483 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
484 {
485 struct page *hpage;
486 u64 hpage_offset;
487 u32 *page;
488 int i;
489
490 hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
491 if (is_error_page(hpage)) {
492 kvm_release_page_clean(hpage);
493 return;
494 }
495
496 hpage_offset = pte->raddr & ~PAGE_MASK;
497 hpage_offset &= ~0xFFFULL;
498 hpage_offset /= 4;
499
500 get_page(hpage);
501 page = kmap_atomic(hpage, KM_USER0);
502
503 /* patch dcbz into reserved instruction, so we trap */
504 for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
505 if ((page[i] & 0xff0007ff) == INS_DCBZ)
506 page[i] &= 0xfffffff7;
507
508 kunmap_atomic(page, KM_USER0);
509 put_page(hpage);
510 }
511
512 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
513 struct kvmppc_pte *pte)
514 {
515 int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
516 int r;
517
518 if (relocated) {
519 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
520 } else {
521 pte->eaddr = eaddr;
522 pte->raddr = eaddr & KVM_PAM;
523 pte->vpage = VSID_REAL | eaddr >> 12;
524 pte->may_read = true;
525 pte->may_write = true;
526 pte->may_execute = true;
527 r = 0;
528 }
529
530 return r;
531 }
532
533 static hva_t kvmppc_bad_hva(void)
534 {
535 return PAGE_OFFSET;
536 }
537
538 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
539 bool read)
540 {
541 hva_t hpage;
542
543 if (read && !pte->may_read)
544 goto err;
545
546 if (!read && !pte->may_write)
547 goto err;
548
549 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
550 if (kvm_is_error_hva(hpage))
551 goto err;
552
553 return hpage | (pte->raddr & ~PAGE_MASK);
554 err:
555 return kvmppc_bad_hva();
556 }
557
558 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
559 bool data)
560 {
561 struct kvmppc_pte pte;
562
563 vcpu->stat.st++;
564
565 if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
566 return -ENOENT;
567
568 *eaddr = pte.raddr;
569
570 if (!pte.may_write)
571 return -EPERM;
572
573 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
574 return EMULATE_DO_MMIO;
575
576 return EMULATE_DONE;
577 }
578
579 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
580 bool data)
581 {
582 struct kvmppc_pte pte;
583 hva_t hva = *eaddr;
584
585 vcpu->stat.ld++;
586
587 if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
588 goto nopte;
589
590 *eaddr = pte.raddr;
591
592 hva = kvmppc_pte_to_hva(vcpu, &pte, true);
593 if (kvm_is_error_hva(hva))
594 goto mmio;
595
596 if (copy_from_user(ptr, (void __user *)hva, size)) {
597 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
598 goto mmio;
599 }
600
601 return EMULATE_DONE;
602
603 nopte:
604 return -ENOENT;
605 mmio:
606 return EMULATE_DO_MMIO;
607 }
608
609 static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
610 {
611 ulong mp_pa = vcpu->arch.magic_page_pa;
612
613 if (unlikely(mp_pa) &&
614 unlikely((mp_pa & KVM_PAM) >> PAGE_SHIFT == gfn)) {
615 return 1;
616 }
617
618 return kvm_is_visible_gfn(vcpu->kvm, gfn);
619 }
620
621 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
622 ulong eaddr, int vec)
623 {
624 bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
625 int r = RESUME_GUEST;
626 int relocated;
627 int page_found = 0;
628 struct kvmppc_pte pte;
629 bool is_mmio = false;
630 bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
631 bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
632 u64 vsid;
633
634 relocated = data ? dr : ir;
635
636 /* Resolve real address if translation turned on */
637 if (relocated) {
638 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
639 } else {
640 pte.may_execute = true;
641 pte.may_read = true;
642 pte.may_write = true;
643 pte.raddr = eaddr & KVM_PAM;
644 pte.eaddr = eaddr;
645 pte.vpage = eaddr >> 12;
646 }
647
648 switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
649 case 0:
650 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
651 break;
652 case MSR_DR:
653 case MSR_IR:
654 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
655
656 if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
657 pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
658 else
659 pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
660 pte.vpage |= vsid;
661
662 if (vsid == -1)
663 page_found = -EINVAL;
664 break;
665 }
666
667 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
668 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
669 /*
670 * If we do the dcbz hack, we have to NX on every execution,
671 * so we can patch the executing code. This renders our guest
672 * NX-less.
673 */
674 pte.may_execute = !data;
675 }
676
677 if (page_found == -ENOENT) {
678 /* Page not found in guest PTE entries */
679 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
680 vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
681 vcpu->arch.shared->msr |=
682 (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
683 kvmppc_book3s_queue_irqprio(vcpu, vec);
684 } else if (page_found == -EPERM) {
685 /* Storage protection */
686 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
687 vcpu->arch.shared->dsisr =
688 to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE;
689 vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
690 vcpu->arch.shared->msr |=
691 (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
692 kvmppc_book3s_queue_irqprio(vcpu, vec);
693 } else if (page_found == -EINVAL) {
694 /* Page not found in guest SLB */
695 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
696 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
697 } else if (!is_mmio &&
698 kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
699 /* The guest's PTE is not mapped yet. Map on the host */
700 kvmppc_mmu_map_page(vcpu, &pte);
701 if (data)
702 vcpu->stat.sp_storage++;
703 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
704 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
705 kvmppc_patch_dcbz(vcpu, &pte);
706 } else {
707 /* MMIO */
708 vcpu->stat.mmio_exits++;
709 vcpu->arch.paddr_accessed = pte.raddr;
710 r = kvmppc_emulate_mmio(run, vcpu);
711 if ( r == RESUME_HOST_NV )
712 r = RESUME_HOST;
713 }
714
715 return r;
716 }
717
718 static inline int get_fpr_index(int i)
719 {
720 #ifdef CONFIG_VSX
721 i *= 2;
722 #endif
723 return i;
724 }
725
726 /* Give up external provider (FPU, Altivec, VSX) */
727 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
728 {
729 struct thread_struct *t = &current->thread;
730 u64 *vcpu_fpr = vcpu->arch.fpr;
731 #ifdef CONFIG_VSX
732 u64 *vcpu_vsx = vcpu->arch.vsr;
733 #endif
734 u64 *thread_fpr = (u64*)t->fpr;
735 int i;
736
737 if (!(vcpu->arch.guest_owned_ext & msr))
738 return;
739
740 #ifdef DEBUG_EXT
741 printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
742 #endif
743
744 switch (msr) {
745 case MSR_FP:
746 giveup_fpu(current);
747 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
748 vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];
749
750 vcpu->arch.fpscr = t->fpscr.val;
751 break;
752 case MSR_VEC:
753 #ifdef CONFIG_ALTIVEC
754 giveup_altivec(current);
755 memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
756 vcpu->arch.vscr = t->vscr;
757 #endif
758 break;
759 case MSR_VSX:
760 #ifdef CONFIG_VSX
761 __giveup_vsx(current);
762 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
763 vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1];
764 #endif
765 break;
766 default:
767 BUG();
768 }
769
770 vcpu->arch.guest_owned_ext &= ~msr;
771 current->thread.regs->msr &= ~msr;
772 kvmppc_recalc_shadow_msr(vcpu);
773 }
774
775 static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
776 {
777 ulong srr0 = kvmppc_get_pc(vcpu);
778 u32 last_inst = kvmppc_get_last_inst(vcpu);
779 int ret;
780
781 ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
782 if (ret == -ENOENT) {
783 ulong msr = vcpu->arch.shared->msr;
784
785 msr = kvmppc_set_field(msr, 33, 33, 1);
786 msr = kvmppc_set_field(msr, 34, 36, 0);
787 vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
788 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
789 return EMULATE_AGAIN;
790 }
791
792 return EMULATE_DONE;
793 }
794
795 static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
796 {
797
798 /* Need to do paired single emulation? */
799 if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
800 return EMULATE_DONE;
801
802 /* Read out the instruction */
803 if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
804 /* Need to emulate */
805 return EMULATE_FAIL;
806
807 return EMULATE_AGAIN;
808 }
809
810 /* Handle external providers (FPU, Altivec, VSX) */
811 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
812 ulong msr)
813 {
814 struct thread_struct *t = &current->thread;
815 u64 *vcpu_fpr = vcpu->arch.fpr;
816 #ifdef CONFIG_VSX
817 u64 *vcpu_vsx = vcpu->arch.vsr;
818 #endif
819 u64 *thread_fpr = (u64*)t->fpr;
820 int i;
821
822 /* When we have paired singles, we emulate in software */
823 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
824 return RESUME_GUEST;
825
826 if (!(vcpu->arch.shared->msr & msr)) {
827 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
828 return RESUME_GUEST;
829 }
830
831 /* We already own the ext */
832 if (vcpu->arch.guest_owned_ext & msr) {
833 return RESUME_GUEST;
834 }
835
836 #ifdef DEBUG_EXT
837 printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
838 #endif
839
840 current->thread.regs->msr |= msr;
841
842 switch (msr) {
843 case MSR_FP:
844 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
845 thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];
846
847 t->fpscr.val = vcpu->arch.fpscr;
848 t->fpexc_mode = 0;
849 kvmppc_load_up_fpu();
850 break;
851 case MSR_VEC:
852 #ifdef CONFIG_ALTIVEC
853 memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
854 t->vscr = vcpu->arch.vscr;
855 t->vrsave = -1;
856 kvmppc_load_up_altivec();
857 #endif
858 break;
859 case MSR_VSX:
860 #ifdef CONFIG_VSX
861 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
862 thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
863 kvmppc_load_up_vsx();
864 #endif
865 break;
866 default:
867 BUG();
868 }
869
870 vcpu->arch.guest_owned_ext |= msr;
871
872 kvmppc_recalc_shadow_msr(vcpu);
873
874 return RESUME_GUEST;
875 }
876
877 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
878 unsigned int exit_nr)
879 {
880 int r = RESUME_HOST;
881
882 vcpu->stat.sum_exits++;
883
884 run->exit_reason = KVM_EXIT_UNKNOWN;
885 run->ready_for_interrupt_injection = 1;
886
887 trace_kvm_book3s_exit(exit_nr, vcpu);
888 kvm_resched(vcpu);
889 switch (exit_nr) {
890 case BOOK3S_INTERRUPT_INST_STORAGE:
891 vcpu->stat.pf_instruc++;
892
893 #ifdef CONFIG_PPC_BOOK3S_32
894 /* We set segments as unused segments when invalidating them. So
895 * treat the respective fault as segment fault. */
896 if (to_svcpu(vcpu)->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT]
897 == SR_INVALID) {
898 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
899 r = RESUME_GUEST;
900 break;
901 }
902 #endif
903
904 /* only care about PTEG not found errors, but leave NX alone */
905 if (to_svcpu(vcpu)->shadow_srr1 & 0x40000000) {
906 r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
907 vcpu->stat.sp_instruc++;
908 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
909 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
910 /*
911 * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
912 * so we can't use the NX bit inside the guest. Let's cross our fingers,
913 * that no guest that needs the dcbz hack does NX.
914 */
915 kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
916 r = RESUME_GUEST;
917 } else {
918 vcpu->arch.shared->msr |=
919 to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
920 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
921 r = RESUME_GUEST;
922 }
923 break;
924 case BOOK3S_INTERRUPT_DATA_STORAGE:
925 {
926 ulong dar = kvmppc_get_fault_dar(vcpu);
927 vcpu->stat.pf_storage++;
928
929 #ifdef CONFIG_PPC_BOOK3S_32
930 /* We set segments as unused segments when invalidating them. So
931 * treat the respective fault as segment fault. */
932 if ((to_svcpu(vcpu)->sr[dar >> SID_SHIFT]) == SR_INVALID) {
933 kvmppc_mmu_map_segment(vcpu, dar);
934 r = RESUME_GUEST;
935 break;
936 }
937 #endif
938
939 /* The only case we need to handle is missing shadow PTEs */
940 if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) {
941 r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
942 } else {
943 vcpu->arch.shared->dar = dar;
944 vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
945 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
946 r = RESUME_GUEST;
947 }
948 break;
949 }
950 case BOOK3S_INTERRUPT_DATA_SEGMENT:
951 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
952 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
953 kvmppc_book3s_queue_irqprio(vcpu,
954 BOOK3S_INTERRUPT_DATA_SEGMENT);
955 }
956 r = RESUME_GUEST;
957 break;
958 case BOOK3S_INTERRUPT_INST_SEGMENT:
959 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
960 kvmppc_book3s_queue_irqprio(vcpu,
961 BOOK3S_INTERRUPT_INST_SEGMENT);
962 }
963 r = RESUME_GUEST;
964 break;
965 /* We're good on these - the host merely wanted to get our attention */
966 case BOOK3S_INTERRUPT_DECREMENTER:
967 vcpu->stat.dec_exits++;
968 r = RESUME_GUEST;
969 break;
970 case BOOK3S_INTERRUPT_EXTERNAL:
971 vcpu->stat.ext_intr_exits++;
972 r = RESUME_GUEST;
973 break;
974 case BOOK3S_INTERRUPT_PERFMON:
975 r = RESUME_GUEST;
976 break;
977 case BOOK3S_INTERRUPT_PROGRAM:
978 {
979 enum emulation_result er;
980 ulong flags;
981
982 program_interrupt:
983 flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull;
984
985 if (vcpu->arch.shared->msr & MSR_PR) {
986 #ifdef EXIT_DEBUG
987 printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
988 #endif
989 if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
990 (INS_DCBZ & 0xfffffff7)) {
991 kvmppc_core_queue_program(vcpu, flags);
992 r = RESUME_GUEST;
993 break;
994 }
995 }
996
997 vcpu->stat.emulated_inst_exits++;
998 er = kvmppc_emulate_instruction(run, vcpu);
999 switch (er) {
1000 case EMULATE_DONE:
1001 r = RESUME_GUEST_NV;
1002 break;
1003 case EMULATE_AGAIN:
1004 r = RESUME_GUEST;
1005 break;
1006 case EMULATE_FAIL:
1007 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
1008 __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
1009 kvmppc_core_queue_program(vcpu, flags);
1010 r = RESUME_GUEST;
1011 break;
1012 case EMULATE_DO_MMIO:
1013 run->exit_reason = KVM_EXIT_MMIO;
1014 r = RESUME_HOST_NV;
1015 break;
1016 default:
1017 BUG();
1018 }
1019 break;
1020 }
1021 case BOOK3S_INTERRUPT_SYSCALL:
1022 if (vcpu->arch.osi_enabled &&
1023 (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
1024 (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
1025 /* MOL hypercalls */
1026 u64 *gprs = run->osi.gprs;
1027 int i;
1028
1029 run->exit_reason = KVM_EXIT_OSI;
1030 for (i = 0; i < 32; i++)
1031 gprs[i] = kvmppc_get_gpr(vcpu, i);
1032 vcpu->arch.osi_needed = 1;
1033 r = RESUME_HOST_NV;
1034 } else if (!(vcpu->arch.shared->msr & MSR_PR) &&
1035 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1036 /* KVM PV hypercalls */
1037 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1038 r = RESUME_GUEST;
1039 } else {
1040 /* Guest syscalls */
1041 vcpu->stat.syscall_exits++;
1042 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1043 r = RESUME_GUEST;
1044 }
1045 break;
1046 case BOOK3S_INTERRUPT_FP_UNAVAIL:
1047 case BOOK3S_INTERRUPT_ALTIVEC:
1048 case BOOK3S_INTERRUPT_VSX:
1049 {
1050 int ext_msr = 0;
1051
1052 switch (exit_nr) {
1053 case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP; break;
1054 case BOOK3S_INTERRUPT_ALTIVEC: ext_msr = MSR_VEC; break;
1055 case BOOK3S_INTERRUPT_VSX: ext_msr = MSR_VSX; break;
1056 }
1057
1058 switch (kvmppc_check_ext(vcpu, exit_nr)) {
1059 case EMULATE_DONE:
1060 /* everything ok - let's enable the ext */
1061 r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
1062 break;
1063 case EMULATE_FAIL:
1064 /* we need to emulate this instruction */
1065 goto program_interrupt;
1066 break;
1067 default:
1068 /* nothing to worry about - go again */
1069 break;
1070 }
1071 break;
1072 }
1073 case BOOK3S_INTERRUPT_ALIGNMENT:
1074 if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
1075 vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
1076 kvmppc_get_last_inst(vcpu));
1077 vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
1078 kvmppc_get_last_inst(vcpu));
1079 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1080 }
1081 r = RESUME_GUEST;
1082 break;
1083 case BOOK3S_INTERRUPT_MACHINE_CHECK:
1084 case BOOK3S_INTERRUPT_TRACE:
1085 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1086 r = RESUME_GUEST;
1087 break;
1088 default:
1089 /* Ugh - bork here! What did we get? */
1090 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
1091 exit_nr, kvmppc_get_pc(vcpu), to_svcpu(vcpu)->shadow_srr1);
1092 r = RESUME_HOST;
1093 BUG();
1094 break;
1095 }
1096
1097
1098 if (!(r & RESUME_HOST)) {
1099 /* To avoid clobbering exit_reason, only check for signals if
1100 * we aren't already exiting to userspace for some other
1101 * reason. */
1102 if (signal_pending(current)) {
1103 #ifdef EXIT_DEBUG
1104 printk(KERN_EMERG "KVM: Going back to host\n");
1105 #endif
1106 vcpu->stat.signal_exits++;
1107 run->exit_reason = KVM_EXIT_INTR;
1108 r = -EINTR;
1109 } else {
1110 /* In case an interrupt came in that was triggered
1111 * from userspace (like DEC), we need to check what
1112 * to inject now! */
1113 kvmppc_core_deliver_interrupts(vcpu);
1114 }
1115 }
1116
1117 trace_kvm_book3s_reenter(r, vcpu);
1118
1119 return r;
1120 }
1121
1122 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1123 {
1124 return 0;
1125 }
1126
1127 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1128 {
1129 int i;
1130
1131 regs->pc = kvmppc_get_pc(vcpu);
1132 regs->cr = kvmppc_get_cr(vcpu);
1133 regs->ctr = kvmppc_get_ctr(vcpu);
1134 regs->lr = kvmppc_get_lr(vcpu);
1135 regs->xer = kvmppc_get_xer(vcpu);
1136 regs->msr = vcpu->arch.shared->msr;
1137 regs->srr0 = vcpu->arch.shared->srr0;
1138 regs->srr1 = vcpu->arch.shared->srr1;
1139 regs->pid = vcpu->arch.pid;
1140 regs->sprg0 = vcpu->arch.shared->sprg0;
1141 regs->sprg1 = vcpu->arch.shared->sprg1;
1142 regs->sprg2 = vcpu->arch.shared->sprg2;
1143 regs->sprg3 = vcpu->arch.shared->sprg3;
1144 regs->sprg4 = vcpu->arch.sprg4;
1145 regs->sprg5 = vcpu->arch.sprg5;
1146 regs->sprg6 = vcpu->arch.sprg6;
1147 regs->sprg7 = vcpu->arch.sprg7;
1148
1149 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1150 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1151
1152 return 0;
1153 }
1154
1155 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1156 {
1157 int i;
1158
1159 kvmppc_set_pc(vcpu, regs->pc);
1160 kvmppc_set_cr(vcpu, regs->cr);
1161 kvmppc_set_ctr(vcpu, regs->ctr);
1162 kvmppc_set_lr(vcpu, regs->lr);
1163 kvmppc_set_xer(vcpu, regs->xer);
1164 kvmppc_set_msr(vcpu, regs->msr);
1165 vcpu->arch.shared->srr0 = regs->srr0;
1166 vcpu->arch.shared->srr1 = regs->srr1;
1167 vcpu->arch.shared->sprg0 = regs->sprg0;
1168 vcpu->arch.shared->sprg1 = regs->sprg1;
1169 vcpu->arch.shared->sprg2 = regs->sprg2;
1170 vcpu->arch.shared->sprg3 = regs->sprg3;
1171 vcpu->arch.sprg4 = regs->sprg4;
1172 vcpu->arch.sprg5 = regs->sprg5;
1173 vcpu->arch.sprg6 = regs->sprg6;
1174 vcpu->arch.sprg7 = regs->sprg7;
1175
1176 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1177 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1178
1179 return 0;
1180 }
1181
1182 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1183 struct kvm_sregs *sregs)
1184 {
1185 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1186 int i;
1187
1188 sregs->pvr = vcpu->arch.pvr;
1189
1190 sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
1191 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1192 for (i = 0; i < 64; i++) {
1193 sregs->u.s.ppc64.slb[i].slbe = vcpu3s->slb[i].orige | i;
1194 sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv;
1195 }
1196 } else {
1197 for (i = 0; i < 16; i++)
1198 sregs->u.s.ppc32.sr[i] = vcpu->arch.shared->sr[i];
1199
1200 for (i = 0; i < 8; i++) {
1201 sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
1202 sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
1203 }
1204 }
1205
1206 return 0;
1207 }
1208
1209 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1210 struct kvm_sregs *sregs)
1211 {
1212 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1213 int i;
1214
1215 kvmppc_set_pvr(vcpu, sregs->pvr);
1216
1217 vcpu3s->sdr1 = sregs->u.s.sdr1;
1218 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1219 for (i = 0; i < 64; i++) {
1220 vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
1221 sregs->u.s.ppc64.slb[i].slbe);
1222 }
1223 } else {
1224 for (i = 0; i < 16; i++) {
1225 vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
1226 }
1227 for (i = 0; i < 8; i++) {
1228 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
1229 (u32)sregs->u.s.ppc32.ibat[i]);
1230 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
1231 (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
1232 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
1233 (u32)sregs->u.s.ppc32.dbat[i]);
1234 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
1235 (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
1236 }
1237 }
1238
1239 /* Flush the MMU after messing with the segments */
1240 kvmppc_mmu_pte_flush(vcpu, 0, 0);
1241
1242 return 0;
1243 }
1244
1245 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1246 {
1247 return -ENOTSUPP;
1248 }
1249
1250 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1251 {
1252 return -ENOTSUPP;
1253 }
1254
1255 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1256 struct kvm_translation *tr)
1257 {
1258 return 0;
1259 }
1260
1261 /*
1262 * Get (and clear) the dirty memory log for a memory slot.
1263 */
1264 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1265 struct kvm_dirty_log *log)
1266 {
1267 struct kvm_memory_slot *memslot;
1268 struct kvm_vcpu *vcpu;
1269 ulong ga, ga_end;
1270 int is_dirty = 0;
1271 int r;
1272 unsigned long n;
1273
1274 mutex_lock(&kvm->slots_lock);
1275
1276 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1277 if (r)
1278 goto out;
1279
1280 /* If nothing is dirty, don't bother messing with page tables. */
1281 if (is_dirty) {
1282 memslot = &kvm->memslots->memslots[log->slot];
1283
1284 ga = memslot->base_gfn << PAGE_SHIFT;
1285 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1286
1287 kvm_for_each_vcpu(n, vcpu, kvm)
1288 kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1289
1290 n = kvm_dirty_bitmap_bytes(memslot);
1291 memset(memslot->dirty_bitmap, 0, n);
1292 }
1293
1294 r = 0;
1295 out:
1296 mutex_unlock(&kvm->slots_lock);
1297 return r;
1298 }
1299
1300 int kvmppc_core_check_processor_compat(void)
1301 {
1302 return 0;
1303 }
1304
1305 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
1306 {
1307 struct kvmppc_vcpu_book3s *vcpu_book3s;
1308 struct kvm_vcpu *vcpu;
1309 int err = -ENOMEM;
1310 unsigned long p;
1311
1312 vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
1313 if (!vcpu_book3s)
1314 goto out;
1315
1316 vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *)
1317 kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
1318 if (!vcpu_book3s->shadow_vcpu)
1319 goto free_vcpu;
1320
1321 vcpu = &vcpu_book3s->vcpu;
1322 err = kvm_vcpu_init(vcpu, kvm, id);
1323 if (err)
1324 goto free_shadow_vcpu;
1325
1326 p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
1327 /* the real shared page fills the last 4k of our page */
1328 vcpu->arch.shared = (void*)(p + PAGE_SIZE - 4096);
1329 if (!p)
1330 goto uninit_vcpu;
1331
1332 vcpu->arch.host_retip = kvm_return_point;
1333 vcpu->arch.host_msr = mfmsr();
1334 #ifdef CONFIG_PPC_BOOK3S_64
1335 /* default to book3s_64 (970fx) */
1336 vcpu->arch.pvr = 0x3C0301;
1337 #else
1338 /* default to book3s_32 (750) */
1339 vcpu->arch.pvr = 0x84202;
1340 #endif
1341 kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
1342 vcpu_book3s->slb_nr = 64;
1343
1344 /* remember where some real-mode handlers are */
1345 vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem;
1346 vcpu->arch.trampoline_enter = kvmppc_trampoline_enter;
1347 vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
1348 #ifdef CONFIG_PPC_BOOK3S_64
1349 vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall;
1350 #else
1351 vcpu->arch.rmcall = (ulong)kvmppc_rmcall;
1352 #endif
1353
1354 vcpu->arch.shadow_msr = MSR_USER64;
1355
1356 err = kvmppc_mmu_init(vcpu);
1357 if (err < 0)
1358 goto uninit_vcpu;
1359
1360 return vcpu;
1361
1362 uninit_vcpu:
1363 kvm_vcpu_uninit(vcpu);
1364 free_shadow_vcpu:
1365 kfree(vcpu_book3s->shadow_vcpu);
1366 free_vcpu:
1367 vfree(vcpu_book3s);
1368 out:
1369 return ERR_PTR(err);
1370 }
1371
1372 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
1373 {
1374 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1375
1376 free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
1377 kvm_vcpu_uninit(vcpu);
1378 kfree(vcpu_book3s->shadow_vcpu);
1379 vfree(vcpu_book3s);
1380 }
1381
1382 extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
1383 int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1384 {
1385 int ret;
1386 double fpr[32][TS_FPRWIDTH];
1387 unsigned int fpscr;
1388 int fpexc_mode;
1389 #ifdef CONFIG_ALTIVEC
1390 vector128 vr[32];
1391 vector128 vscr;
1392 unsigned long uninitialized_var(vrsave);
1393 int used_vr;
1394 #endif
1395 #ifdef CONFIG_VSX
1396 int used_vsr;
1397 #endif
1398 ulong ext_msr;
1399
1400 /* No need to go into the guest when all we do is going out */
1401 if (signal_pending(current)) {
1402 kvm_run->exit_reason = KVM_EXIT_INTR;
1403 return -EINTR;
1404 }
1405
1406 /* Save FPU state in stack */
1407 if (current->thread.regs->msr & MSR_FP)
1408 giveup_fpu(current);
1409 memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
1410 fpscr = current->thread.fpscr.val;
1411 fpexc_mode = current->thread.fpexc_mode;
1412
1413 #ifdef CONFIG_ALTIVEC
1414 /* Save Altivec state in stack */
1415 used_vr = current->thread.used_vr;
1416 if (used_vr) {
1417 if (current->thread.regs->msr & MSR_VEC)
1418 giveup_altivec(current);
1419 memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
1420 vscr = current->thread.vscr;
1421 vrsave = current->thread.vrsave;
1422 }
1423 #endif
1424
1425 #ifdef CONFIG_VSX
1426 /* Save VSX state in stack */
1427 used_vsr = current->thread.used_vsr;
1428 if (used_vsr && (current->thread.regs->msr & MSR_VSX))
1429 __giveup_vsx(current);
1430 #endif
1431
1432 /* Remember the MSR with disabled extensions */
1433 ext_msr = current->thread.regs->msr;
1434
1435 /* XXX we get called with irq disabled - change that! */
1436 local_irq_enable();
1437
1438 /* Preload FPU if it's enabled */
1439 if (vcpu->arch.shared->msr & MSR_FP)
1440 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1441
1442 ret = __kvmppc_vcpu_entry(kvm_run, vcpu);
1443
1444 local_irq_disable();
1445
1446 current->thread.regs->msr = ext_msr;
1447
1448 /* Make sure we save the guest FPU/Altivec/VSX state */
1449 kvmppc_giveup_ext(vcpu, MSR_FP);
1450 kvmppc_giveup_ext(vcpu, MSR_VEC);
1451 kvmppc_giveup_ext(vcpu, MSR_VSX);
1452
1453 /* Restore FPU state from stack */
1454 memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
1455 current->thread.fpscr.val = fpscr;
1456 current->thread.fpexc_mode = fpexc_mode;
1457
1458 #ifdef CONFIG_ALTIVEC
1459 /* Restore Altivec state from stack */
1460 if (used_vr && current->thread.used_vr) {
1461 memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
1462 current->thread.vscr = vscr;
1463 current->thread.vrsave = vrsave;
1464 }
1465 current->thread.used_vr = used_vr;
1466 #endif
1467
1468 #ifdef CONFIG_VSX
1469 current->thread.used_vsr = used_vsr;
1470 #endif
1471
1472 return ret;
1473 }
1474
1475 static int kvmppc_book3s_init(void)
1476 {
1477 int r;
1478
1479 r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0,
1480 THIS_MODULE);
1481
1482 if (r)
1483 return r;
1484
1485 r = kvmppc_mmu_hpte_sysinit();
1486
1487 return r;
1488 }
1489
1490 static void kvmppc_book3s_exit(void)
1491 {
1492 kvmppc_mmu_hpte_sysexit();
1493 kvm_exit();
1494 }
1495
1496 module_init(kvmppc_book3s_init);
1497 module_exit(kvmppc_book3s_exit);
linux-next