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KVM: PPC: booke: Get/set guest EPCR register using ONE_REG interface
[linux-2.6/btrfs-unstable.git] / arch / powerpc / kvm / booke.c
blob69f1140157807c7df83c33541975e799563ed865
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
14 *
15 * Copyright IBM Corp. 2007
16 * Copyright 2010-2011 Freescale Semiconductor, Inc.
17 *
18 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
19 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
20 * Scott Wood <scottwood@freescale.com>
21 * Varun Sethi <varun.sethi@freescale.com>
22 */
23
24 #include <linux/errno.h>
25 #include <linux/err.h>
26 #include <linux/kvm_host.h>
27 #include <linux/gfp.h>
28 #include <linux/module.h>
29 #include <linux/vmalloc.h>
30 #include <linux/fs.h>
31
32 #include <asm/cputable.h>
33 #include <asm/uaccess.h>
34 #include <asm/kvm_ppc.h>
35 #include <asm/cacheflush.h>
36 #include <asm/dbell.h>
37 #include <asm/hw_irq.h>
38 #include <asm/irq.h>
39 #include <asm/time.h>
40
41 #include "timing.h"
42 #include "booke.h"
43 #include "trace.h"
44
45 unsigned long kvmppc_booke_handlers;
46
47 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
48 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
49
50 struct kvm_stats_debugfs_item debugfs_entries[] = {
51 { "mmio", VCPU_STAT(mmio_exits) },
52 { "dcr", VCPU_STAT(dcr_exits) },
53 { "sig", VCPU_STAT(signal_exits) },
54 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
55 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
56 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) },
57 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) },
58 { "sysc", VCPU_STAT(syscall_exits) },
59 { "isi", VCPU_STAT(isi_exits) },
60 { "dsi", VCPU_STAT(dsi_exits) },
61 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
62 { "dec", VCPU_STAT(dec_exits) },
63 { "ext_intr", VCPU_STAT(ext_intr_exits) },
64 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
65 { "doorbell", VCPU_STAT(dbell_exits) },
66 { "guest doorbell", VCPU_STAT(gdbell_exits) },
67 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
68 { NULL }
69 };
70
71 /* TODO: use vcpu_printf() */
72 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
73 {
74 int i;
75
76 printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
77 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
78 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
79 vcpu->arch.shared->srr1);
80
81 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
82
83 for (i = 0; i < 32; i += 4) {
84 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
85 kvmppc_get_gpr(vcpu, i),
86 kvmppc_get_gpr(vcpu, i+1),
87 kvmppc_get_gpr(vcpu, i+2),
88 kvmppc_get_gpr(vcpu, i+3));
89 }
90 }
91
92 #ifdef CONFIG_SPE
93 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
94 {
95 preempt_disable();
96 enable_kernel_spe();
97 kvmppc_save_guest_spe(vcpu);
98 vcpu->arch.shadow_msr &= ~MSR_SPE;
99 preempt_enable();
100 }
101
102 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
103 {
104 preempt_disable();
105 enable_kernel_spe();
106 kvmppc_load_guest_spe(vcpu);
107 vcpu->arch.shadow_msr |= MSR_SPE;
108 preempt_enable();
109 }
110
111 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
112 {
113 if (vcpu->arch.shared->msr & MSR_SPE) {
114 if (!(vcpu->arch.shadow_msr & MSR_SPE))
115 kvmppc_vcpu_enable_spe(vcpu);
116 } else if (vcpu->arch.shadow_msr & MSR_SPE) {
117 kvmppc_vcpu_disable_spe(vcpu);
118 }
119 }
120 #else
121 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
122 {
123 }
124 #endif
125
126 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
127 {
128 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV)
129 /* We always treat the FP bit as enabled from the host
130 perspective, so only need to adjust the shadow MSR */
131 vcpu->arch.shadow_msr &= ~MSR_FP;
132 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP;
133 #endif
134 }
135
136 /*
137 * Helper function for "full" MSR writes. No need to call this if only
138 * EE/CE/ME/DE/RI are changing.
139 */
140 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
141 {
142 u32 old_msr = vcpu->arch.shared->msr;
143
144 #ifdef CONFIG_KVM_BOOKE_HV
145 new_msr |= MSR_GS;
146 #endif
147
148 vcpu->arch.shared->msr = new_msr;
149
150 kvmppc_mmu_msr_notify(vcpu, old_msr);
151 kvmppc_vcpu_sync_spe(vcpu);
152 kvmppc_vcpu_sync_fpu(vcpu);
153 }
154
155 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
156 unsigned int priority)
157 {
158 trace_kvm_booke_queue_irqprio(vcpu, priority);
159 set_bit(priority, &vcpu->arch.pending_exceptions);
160 }
161
162 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
163 ulong dear_flags, ulong esr_flags)
164 {
165 vcpu->arch.queued_dear = dear_flags;
166 vcpu->arch.queued_esr = esr_flags;
167 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
168 }
169
170 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
171 ulong dear_flags, ulong esr_flags)
172 {
173 vcpu->arch.queued_dear = dear_flags;
174 vcpu->arch.queued_esr = esr_flags;
175 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
176 }
177
178 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
179 ulong esr_flags)
180 {
181 vcpu->arch.queued_esr = esr_flags;
182 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
183 }
184
185 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
186 {
187 vcpu->arch.queued_esr = esr_flags;
188 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
189 }
190
191 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
192 {
193 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
194 }
195
196 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
197 {
198 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
199 }
200
201 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
202 {
203 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
204 }
205
206 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
207 struct kvm_interrupt *irq)
208 {
209 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
210
211 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
212 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
213
214 kvmppc_booke_queue_irqprio(vcpu, prio);
215 }
216
217 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
218 struct kvm_interrupt *irq)
219 {
220 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
221 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
222 }
223
224 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu)
225 {
226 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG);
227 }
228
229 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu)
230 {
231 clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions);
232 }
233
234 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
235 {
236 #ifdef CONFIG_KVM_BOOKE_HV
237 mtspr(SPRN_GSRR0, srr0);
238 mtspr(SPRN_GSRR1, srr1);
239 #else
240 vcpu->arch.shared->srr0 = srr0;
241 vcpu->arch.shared->srr1 = srr1;
242 #endif
243 }
244
245 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
246 {
247 vcpu->arch.csrr0 = srr0;
248 vcpu->arch.csrr1 = srr1;
249 }
250
251 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
252 {
253 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
254 vcpu->arch.dsrr0 = srr0;
255 vcpu->arch.dsrr1 = srr1;
256 } else {
257 set_guest_csrr(vcpu, srr0, srr1);
258 }
259 }
260
261 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
262 {
263 vcpu->arch.mcsrr0 = srr0;
264 vcpu->arch.mcsrr1 = srr1;
265 }
266
267 static unsigned long get_guest_dear(struct kvm_vcpu *vcpu)
268 {
269 #ifdef CONFIG_KVM_BOOKE_HV
270 return mfspr(SPRN_GDEAR);
271 #else
272 return vcpu->arch.shared->dar;
273 #endif
274 }
275
276 static void set_guest_dear(struct kvm_vcpu *vcpu, unsigned long dear)
277 {
278 #ifdef CONFIG_KVM_BOOKE_HV
279 mtspr(SPRN_GDEAR, dear);
280 #else
281 vcpu->arch.shared->dar = dear;
282 #endif
283 }
284
285 static unsigned long get_guest_esr(struct kvm_vcpu *vcpu)
286 {
287 #ifdef CONFIG_KVM_BOOKE_HV
288 return mfspr(SPRN_GESR);
289 #else
290 return vcpu->arch.shared->esr;
291 #endif
292 }
293
294 static void set_guest_esr(struct kvm_vcpu *vcpu, u32 esr)
295 {
296 #ifdef CONFIG_KVM_BOOKE_HV
297 mtspr(SPRN_GESR, esr);
298 #else
299 vcpu->arch.shared->esr = esr;
300 #endif
301 }
302
303 /* Deliver the interrupt of the corresponding priority, if possible. */
304 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
305 unsigned int priority)
306 {
307 int allowed = 0;
308 ulong msr_mask = 0;
309 bool update_esr = false, update_dear = false;
310 ulong crit_raw = vcpu->arch.shared->critical;
311 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
312 bool crit;
313 bool keep_irq = false;
314 enum int_class int_class;
315 ulong new_msr = vcpu->arch.shared->msr;
316
317 /* Truncate crit indicators in 32 bit mode */
318 if (!(vcpu->arch.shared->msr & MSR_SF)) {
319 crit_raw &= 0xffffffff;
320 crit_r1 &= 0xffffffff;
321 }
322
323 /* Critical section when crit == r1 */
324 crit = (crit_raw == crit_r1);
325 /* ... and we're in supervisor mode */
326 crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
327
328 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
329 priority = BOOKE_IRQPRIO_EXTERNAL;
330 keep_irq = true;
331 }
332
333 switch (priority) {
334 case BOOKE_IRQPRIO_DTLB_MISS:
335 case BOOKE_IRQPRIO_DATA_STORAGE:
336 update_dear = true;
337 /* fall through */
338 case BOOKE_IRQPRIO_INST_STORAGE:
339 case BOOKE_IRQPRIO_PROGRAM:
340 update_esr = true;
341 /* fall through */
342 case BOOKE_IRQPRIO_ITLB_MISS:
343 case BOOKE_IRQPRIO_SYSCALL:
344 case BOOKE_IRQPRIO_FP_UNAVAIL:
345 case BOOKE_IRQPRIO_SPE_UNAVAIL:
346 case BOOKE_IRQPRIO_SPE_FP_DATA:
347 case BOOKE_IRQPRIO_SPE_FP_ROUND:
348 case BOOKE_IRQPRIO_AP_UNAVAIL:
349 case BOOKE_IRQPRIO_ALIGNMENT:
350 allowed = 1;
351 msr_mask = MSR_CE | MSR_ME | MSR_DE;
352 int_class = INT_CLASS_NONCRIT;
353 break;
354 case BOOKE_IRQPRIO_WATCHDOG:
355 case BOOKE_IRQPRIO_CRITICAL:
356 case BOOKE_IRQPRIO_DBELL_CRIT:
357 allowed = vcpu->arch.shared->msr & MSR_CE;
358 allowed = allowed && !crit;
359 msr_mask = MSR_ME;
360 int_class = INT_CLASS_CRIT;
361 break;
362 case BOOKE_IRQPRIO_MACHINE_CHECK:
363 allowed = vcpu->arch.shared->msr & MSR_ME;
364 allowed = allowed && !crit;
365 int_class = INT_CLASS_MC;
366 break;
367 case BOOKE_IRQPRIO_DECREMENTER:
368 case BOOKE_IRQPRIO_FIT:
369 keep_irq = true;
370 /* fall through */
371 case BOOKE_IRQPRIO_EXTERNAL:
372 case BOOKE_IRQPRIO_DBELL:
373 allowed = vcpu->arch.shared->msr & MSR_EE;
374 allowed = allowed && !crit;
375 msr_mask = MSR_CE | MSR_ME | MSR_DE;
376 int_class = INT_CLASS_NONCRIT;
377 break;
378 case BOOKE_IRQPRIO_DEBUG:
379 allowed = vcpu->arch.shared->msr & MSR_DE;
380 allowed = allowed && !crit;
381 msr_mask = MSR_ME;
382 int_class = INT_CLASS_CRIT;
383 break;
384 }
385
386 if (allowed) {
387 switch (int_class) {
388 case INT_CLASS_NONCRIT:
389 set_guest_srr(vcpu, vcpu->arch.pc,
390 vcpu->arch.shared->msr);
391 break;
392 case INT_CLASS_CRIT:
393 set_guest_csrr(vcpu, vcpu->arch.pc,
394 vcpu->arch.shared->msr);
395 break;
396 case INT_CLASS_DBG:
397 set_guest_dsrr(vcpu, vcpu->arch.pc,
398 vcpu->arch.shared->msr);
399 break;
400 case INT_CLASS_MC:
401 set_guest_mcsrr(vcpu, vcpu->arch.pc,
402 vcpu->arch.shared->msr);
403 break;
404 }
405
406 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
407 if (update_esr == true)
408 set_guest_esr(vcpu, vcpu->arch.queued_esr);
409 if (update_dear == true)
410 set_guest_dear(vcpu, vcpu->arch.queued_dear);
411
412 new_msr &= msr_mask;
413 #if defined(CONFIG_64BIT)
414 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
415 new_msr |= MSR_CM;
416 #endif
417 kvmppc_set_msr(vcpu, new_msr);
418
419 if (!keep_irq)
420 clear_bit(priority, &vcpu->arch.pending_exceptions);
421 }
422
423 #ifdef CONFIG_KVM_BOOKE_HV
424 /*
425 * If an interrupt is pending but masked, raise a guest doorbell
426 * so that we are notified when the guest enables the relevant
427 * MSR bit.
428 */
429 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
430 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
431 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
432 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
433 if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
434 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
435 #endif
436
437 return allowed;
438 }
439
440 /*
441 * Return the number of jiffies until the next timeout. If the timeout is
442 * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA
443 * because the larger value can break the timer APIs.
444 */
445 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu)
446 {
447 u64 tb, wdt_tb, wdt_ticks = 0;
448 u64 nr_jiffies = 0;
449 u32 period = TCR_GET_WP(vcpu->arch.tcr);
450
451 wdt_tb = 1ULL << (63 - period);
452 tb = get_tb();
453 /*
454 * The watchdog timeout will hapeen when TB bit corresponding
455 * to watchdog will toggle from 0 to 1.
456 */
457 if (tb & wdt_tb)
458 wdt_ticks = wdt_tb;
459
460 wdt_ticks += wdt_tb - (tb & (wdt_tb - 1));
461
462 /* Convert timebase ticks to jiffies */
463 nr_jiffies = wdt_ticks;
464
465 if (do_div(nr_jiffies, tb_ticks_per_jiffy))
466 nr_jiffies++;
467
468 return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA);
469 }
470
471 static void arm_next_watchdog(struct kvm_vcpu *vcpu)
472 {
473 unsigned long nr_jiffies;
474 unsigned long flags;
475
476 /*
477 * If TSR_ENW and TSR_WIS are not set then no need to exit to
478 * userspace, so clear the KVM_REQ_WATCHDOG request.
479 */
480 if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS))
481 clear_bit(KVM_REQ_WATCHDOG, &vcpu->requests);
482
483 spin_lock_irqsave(&vcpu->arch.wdt_lock, flags);
484 nr_jiffies = watchdog_next_timeout(vcpu);
485 /*
486 * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA
487 * then do not run the watchdog timer as this can break timer APIs.
488 */
489 if (nr_jiffies < NEXT_TIMER_MAX_DELTA)
490 mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies);
491 else
492 del_timer(&vcpu->arch.wdt_timer);
493 spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags);
494 }
495
496 void kvmppc_watchdog_func(unsigned long data)
497 {
498 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
499 u32 tsr, new_tsr;
500 int final;
501
502 do {
503 new_tsr = tsr = vcpu->arch.tsr;
504 final = 0;
505
506 /* Time out event */
507 if (tsr & TSR_ENW) {
508 if (tsr & TSR_WIS)
509 final = 1;
510 else
511 new_tsr = tsr | TSR_WIS;
512 } else {
513 new_tsr = tsr | TSR_ENW;
514 }
515 } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr);
516
517 if (new_tsr & TSR_WIS) {
518 smp_wmb();
519 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
520 kvm_vcpu_kick(vcpu);
521 }
522
523 /*
524 * If this is final watchdog expiry and some action is required
525 * then exit to userspace.
526 */
527 if (final && (vcpu->arch.tcr & TCR_WRC_MASK) &&
528 vcpu->arch.watchdog_enabled) {
529 smp_wmb();
530 kvm_make_request(KVM_REQ_WATCHDOG, vcpu);
531 kvm_vcpu_kick(vcpu);
532 }
533
534 /*
535 * Stop running the watchdog timer after final expiration to
536 * prevent the host from being flooded with timers if the
537 * guest sets a short period.
538 * Timers will resume when TSR/TCR is updated next time.
539 */
540 if (!final)
541 arm_next_watchdog(vcpu);
542 }
543
544 static void update_timer_ints(struct kvm_vcpu *vcpu)
545 {
546 if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
547 kvmppc_core_queue_dec(vcpu);
548 else
549 kvmppc_core_dequeue_dec(vcpu);
550
551 if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS))
552 kvmppc_core_queue_watchdog(vcpu);
553 else
554 kvmppc_core_dequeue_watchdog(vcpu);
555 }
556
557 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
558 {
559 unsigned long *pending = &vcpu->arch.pending_exceptions;
560 unsigned int priority;
561
562 priority = __ffs(*pending);
563 while (priority < BOOKE_IRQPRIO_MAX) {
564 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
565 break;
566
567 priority = find_next_bit(pending,
568 BITS_PER_BYTE * sizeof(*pending),
569 priority + 1);
570 }
571
572 /* Tell the guest about our interrupt status */
573 vcpu->arch.shared->int_pending = !!*pending;
574 }
575
576 /* Check pending exceptions and deliver one, if possible. */
577 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
578 {
579 int r = 0;
580 WARN_ON_ONCE(!irqs_disabled());
581
582 kvmppc_core_check_exceptions(vcpu);
583
584 if (vcpu->arch.shared->msr & MSR_WE) {
585 local_irq_enable();
586 kvm_vcpu_block(vcpu);
587 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
588 local_irq_disable();
589
590 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
591 r = 1;
592 };
593
594 return r;
595 }
596
597 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
598 {
599 int r = 1; /* Indicate we want to get back into the guest */
600
601 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
602 update_timer_ints(vcpu);
603 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
604 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
605 kvmppc_core_flush_tlb(vcpu);
606 #endif
607
608 if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) {
609 vcpu->run->exit_reason = KVM_EXIT_WATCHDOG;
610 r = 0;
611 }
612
613 return r;
614 }
615
616 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
617 {
618 int ret, s;
619 #ifdef CONFIG_PPC_FPU
620 unsigned int fpscr;
621 int fpexc_mode;
622 u64 fpr[32];
623 #endif
624
625 if (!vcpu->arch.sane) {
626 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
627 return -EINVAL;
628 }
629
630 local_irq_disable();
631 s = kvmppc_prepare_to_enter(vcpu);
632 if (s <= 0) {
633 local_irq_enable();
634 ret = s;
635 goto out;
636 }
637 kvmppc_lazy_ee_enable();
638
639 kvm_guest_enter();
640
641 #ifdef CONFIG_PPC_FPU
642 /* Save userspace FPU state in stack */
643 enable_kernel_fp();
644 memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
645 fpscr = current->thread.fpscr.val;
646 fpexc_mode = current->thread.fpexc_mode;
647
648 /* Restore guest FPU state to thread */
649 memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr));
650 current->thread.fpscr.val = vcpu->arch.fpscr;
651
652 /*
653 * Since we can't trap on MSR_FP in GS-mode, we consider the guest
654 * as always using the FPU. Kernel usage of FP (via
655 * enable_kernel_fp()) in this thread must not occur while
656 * vcpu->fpu_active is set.
657 */
658 vcpu->fpu_active = 1;
659
660 kvmppc_load_guest_fp(vcpu);
661 #endif
662
663 ret = __kvmppc_vcpu_run(kvm_run, vcpu);
664
665 /* No need for kvm_guest_exit. It's done in handle_exit.
666 We also get here with interrupts enabled. */
667
668 #ifdef CONFIG_PPC_FPU
669 kvmppc_save_guest_fp(vcpu);
670
671 vcpu->fpu_active = 0;
672
673 /* Save guest FPU state from thread */
674 memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr));
675 vcpu->arch.fpscr = current->thread.fpscr.val;
676
677 /* Restore userspace FPU state from stack */
678 memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
679 current->thread.fpscr.val = fpscr;
680 current->thread.fpexc_mode = fpexc_mode;
681 #endif
682
683 out:
684 vcpu->mode = OUTSIDE_GUEST_MODE;
685 return ret;
686 }
687
688 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
689 {
690 enum emulation_result er;
691
692 er = kvmppc_emulate_instruction(run, vcpu);
693 switch (er) {
694 case EMULATE_DONE:
695 /* don't overwrite subtypes, just account kvm_stats */
696 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
697 /* Future optimization: only reload non-volatiles if
698 * they were actually modified by emulation. */
699 return RESUME_GUEST_NV;
700
701 case EMULATE_DO_DCR:
702 run->exit_reason = KVM_EXIT_DCR;
703 return RESUME_HOST;
704
705 case EMULATE_FAIL:
706 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
707 __func__, vcpu->arch.pc, vcpu->arch.last_inst);
708 /* For debugging, encode the failing instruction and
709 * report it to userspace. */
710 run->hw.hardware_exit_reason = ~0ULL << 32;
711 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
712 kvmppc_core_queue_program(vcpu, ESR_PIL);
713 return RESUME_HOST;
714
715 default:
716 BUG();
717 }
718 }
719
720 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
721 {
722 ulong r1, ip, msr, lr;
723
724 asm("mr %0, 1" : "=r"(r1));
725 asm("mflr %0" : "=r"(lr));
726 asm("mfmsr %0" : "=r"(msr));
727 asm("bl 1f; 1: mflr %0" : "=r"(ip));
728
729 memset(regs, 0, sizeof(*regs));
730 regs->gpr[1] = r1;
731 regs->nip = ip;
732 regs->msr = msr;
733 regs->link = lr;
734 }
735
736 /*
737 * For interrupts needed to be handled by host interrupt handlers,
738 * corresponding host handler are called from here in similar way
739 * (but not exact) as they are called from low level handler
740 * (such as from arch/powerpc/kernel/head_fsl_booke.S).
741 */
742 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
743 unsigned int exit_nr)
744 {
745 struct pt_regs regs;
746
747 switch (exit_nr) {
748 case BOOKE_INTERRUPT_EXTERNAL:
749 kvmppc_fill_pt_regs(&regs);
750 do_IRQ(&regs);
751 break;
752 case BOOKE_INTERRUPT_DECREMENTER:
753 kvmppc_fill_pt_regs(&regs);
754 timer_interrupt(&regs);
755 break;
756 #if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64)
757 case BOOKE_INTERRUPT_DOORBELL:
758 kvmppc_fill_pt_regs(&regs);
759 doorbell_exception(&regs);
760 break;
761 #endif
762 case BOOKE_INTERRUPT_MACHINE_CHECK:
763 /* FIXME */
764 break;
765 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
766 kvmppc_fill_pt_regs(&regs);
767 performance_monitor_exception(&regs);
768 break;
769 case BOOKE_INTERRUPT_WATCHDOG:
770 kvmppc_fill_pt_regs(&regs);
771 #ifdef CONFIG_BOOKE_WDT
772 WatchdogException(&regs);
773 #else
774 unknown_exception(&regs);
775 #endif
776 break;
777 case BOOKE_INTERRUPT_CRITICAL:
778 unknown_exception(&regs);
779 break;
780 }
781 }
782
783 /**
784 * kvmppc_handle_exit
785 *
786 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
787 */
788 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
789 unsigned int exit_nr)
790 {
791 int r = RESUME_HOST;
792 int s;
793
794 /* update before a new last_exit_type is rewritten */
795 kvmppc_update_timing_stats(vcpu);
796
797 /* restart interrupts if they were meant for the host */
798 kvmppc_restart_interrupt(vcpu, exit_nr);
799
800 local_irq_enable();
801
802 trace_kvm_exit(exit_nr, vcpu);
803 kvm_guest_exit();
804
805 run->exit_reason = KVM_EXIT_UNKNOWN;
806 run->ready_for_interrupt_injection = 1;
807
808 switch (exit_nr) {
809 case BOOKE_INTERRUPT_MACHINE_CHECK:
810 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
811 kvmppc_dump_vcpu(vcpu);
812 /* For debugging, send invalid exit reason to user space */
813 run->hw.hardware_exit_reason = ~1ULL << 32;
814 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
815 r = RESUME_HOST;
816 break;
817
818 case BOOKE_INTERRUPT_EXTERNAL:
819 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
820 r = RESUME_GUEST;
821 break;
822
823 case BOOKE_INTERRUPT_DECREMENTER:
824 kvmppc_account_exit(vcpu, DEC_EXITS);
825 r = RESUME_GUEST;
826 break;
827
828 case BOOKE_INTERRUPT_WATCHDOG:
829 r = RESUME_GUEST;
830 break;
831
832 case BOOKE_INTERRUPT_DOORBELL:
833 kvmppc_account_exit(vcpu, DBELL_EXITS);
834 r = RESUME_GUEST;
835 break;
836
837 case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
838 kvmppc_account_exit(vcpu, GDBELL_EXITS);
839
840 /*
841 * We are here because there is a pending guest interrupt
842 * which could not be delivered as MSR_CE or MSR_ME was not
843 * set. Once we break from here we will retry delivery.
844 */
845 r = RESUME_GUEST;
846 break;
847
848 case BOOKE_INTERRUPT_GUEST_DBELL:
849 kvmppc_account_exit(vcpu, GDBELL_EXITS);
850
851 /*
852 * We are here because there is a pending guest interrupt
853 * which could not be delivered as MSR_EE was not set. Once
854 * we break from here we will retry delivery.
855 */
856 r = RESUME_GUEST;
857 break;
858
859 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
860 r = RESUME_GUEST;
861 break;
862
863 case BOOKE_INTERRUPT_HV_PRIV:
864 r = emulation_exit(run, vcpu);
865 break;
866
867 case BOOKE_INTERRUPT_PROGRAM:
868 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
869 /*
870 * Program traps generated by user-level software must
871 * be handled by the guest kernel.
872 *
873 * In GS mode, hypervisor privileged instructions trap
874 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
875 * actual program interrupts, handled by the guest.
876 */
877 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
878 r = RESUME_GUEST;
879 kvmppc_account_exit(vcpu, USR_PR_INST);
880 break;
881 }
882
883 r = emulation_exit(run, vcpu);
884 break;
885
886 case BOOKE_INTERRUPT_FP_UNAVAIL:
887 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
888 kvmppc_account_exit(vcpu, FP_UNAVAIL);
889 r = RESUME_GUEST;
890 break;
891
892 #ifdef CONFIG_SPE
893 case BOOKE_INTERRUPT_SPE_UNAVAIL: {
894 if (vcpu->arch.shared->msr & MSR_SPE)
895 kvmppc_vcpu_enable_spe(vcpu);
896 else
897 kvmppc_booke_queue_irqprio(vcpu,
898 BOOKE_IRQPRIO_SPE_UNAVAIL);
899 r = RESUME_GUEST;
900 break;
901 }
902
903 case BOOKE_INTERRUPT_SPE_FP_DATA:
904 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
905 r = RESUME_GUEST;
906 break;
907
908 case BOOKE_INTERRUPT_SPE_FP_ROUND:
909 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
910 r = RESUME_GUEST;
911 break;
912 #else
913 case BOOKE_INTERRUPT_SPE_UNAVAIL:
914 /*
915 * Guest wants SPE, but host kernel doesn't support it. Send
916 * an "unimplemented operation" program check to the guest.
917 */
918 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
919 r = RESUME_GUEST;
920 break;
921
922 /*
923 * These really should never happen without CONFIG_SPE,
924 * as we should never enable the real MSR[SPE] in the guest.
925 */
926 case BOOKE_INTERRUPT_SPE_FP_DATA:
927 case BOOKE_INTERRUPT_SPE_FP_ROUND:
928 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
929 __func__, exit_nr, vcpu->arch.pc);
930 run->hw.hardware_exit_reason = exit_nr;
931 r = RESUME_HOST;
932 break;
933 #endif
934
935 case BOOKE_INTERRUPT_DATA_STORAGE:
936 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
937 vcpu->arch.fault_esr);
938 kvmppc_account_exit(vcpu, DSI_EXITS);
939 r = RESUME_GUEST;
940 break;
941
942 case BOOKE_INTERRUPT_INST_STORAGE:
943 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
944 kvmppc_account_exit(vcpu, ISI_EXITS);
945 r = RESUME_GUEST;
946 break;
947
948 #ifdef CONFIG_KVM_BOOKE_HV
949 case BOOKE_INTERRUPT_HV_SYSCALL:
950 if (!(vcpu->arch.shared->msr & MSR_PR)) {
951 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
952 } else {
953 /*
954 * hcall from guest userspace -- send privileged
955 * instruction program check.
956 */
957 kvmppc_core_queue_program(vcpu, ESR_PPR);
958 }
959
960 r = RESUME_GUEST;
961 break;
962 #else
963 case BOOKE_INTERRUPT_SYSCALL:
964 if (!(vcpu->arch.shared->msr & MSR_PR) &&
965 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
966 /* KVM PV hypercalls */
967 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
968 r = RESUME_GUEST;
969 } else {
970 /* Guest syscalls */
971 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
972 }
973 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
974 r = RESUME_GUEST;
975 break;
976 #endif
977
978 case BOOKE_INTERRUPT_DTLB_MISS: {
979 unsigned long eaddr = vcpu->arch.fault_dear;
980 int gtlb_index;
981 gpa_t gpaddr;
982 gfn_t gfn;
983
984 #ifdef CONFIG_KVM_E500V2
985 if (!(vcpu->arch.shared->msr & MSR_PR) &&
986 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
987 kvmppc_map_magic(vcpu);
988 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
989 r = RESUME_GUEST;
990
991 break;
992 }
993 #endif
994
995 /* Check the guest TLB. */
996 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
997 if (gtlb_index < 0) {
998 /* The guest didn't have a mapping for it. */
999 kvmppc_core_queue_dtlb_miss(vcpu,
1000 vcpu->arch.fault_dear,
1001 vcpu->arch.fault_esr);
1002 kvmppc_mmu_dtlb_miss(vcpu);
1003 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
1004 r = RESUME_GUEST;
1005 break;
1006 }
1007
1008 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1009 gfn = gpaddr >> PAGE_SHIFT;
1010
1011 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1012 /* The guest TLB had a mapping, but the shadow TLB
1013 * didn't, and it is RAM. This could be because:
1014 * a) the entry is mapping the host kernel, or
1015 * b) the guest used a large mapping which we're faking
1016 * Either way, we need to satisfy the fault without
1017 * invoking the guest. */
1018 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1019 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1020 r = RESUME_GUEST;
1021 } else {
1022 /* Guest has mapped and accessed a page which is not
1023 * actually RAM. */
1024 vcpu->arch.paddr_accessed = gpaddr;
1025 vcpu->arch.vaddr_accessed = eaddr;
1026 r = kvmppc_emulate_mmio(run, vcpu);
1027 kvmppc_account_exit(vcpu, MMIO_EXITS);
1028 }
1029
1030 break;
1031 }
1032
1033 case BOOKE_INTERRUPT_ITLB_MISS: {
1034 unsigned long eaddr = vcpu->arch.pc;
1035 gpa_t gpaddr;
1036 gfn_t gfn;
1037 int gtlb_index;
1038
1039 r = RESUME_GUEST;
1040
1041 /* Check the guest TLB. */
1042 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1043 if (gtlb_index < 0) {
1044 /* The guest didn't have a mapping for it. */
1045 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
1046 kvmppc_mmu_itlb_miss(vcpu);
1047 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
1048 break;
1049 }
1050
1051 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
1052
1053 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1054 gfn = gpaddr >> PAGE_SHIFT;
1055
1056 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1057 /* The guest TLB had a mapping, but the shadow TLB
1058 * didn't. This could be because:
1059 * a) the entry is mapping the host kernel, or
1060 * b) the guest used a large mapping which we're faking
1061 * Either way, we need to satisfy the fault without
1062 * invoking the guest. */
1063 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1064 } else {
1065 /* Guest mapped and leaped at non-RAM! */
1066 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
1067 }
1068
1069 break;
1070 }
1071
1072 case BOOKE_INTERRUPT_DEBUG: {
1073 u32 dbsr;
1074
1075 vcpu->arch.pc = mfspr(SPRN_CSRR0);
1076
1077 /* clear IAC events in DBSR register */
1078 dbsr = mfspr(SPRN_DBSR);
1079 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
1080 mtspr(SPRN_DBSR, dbsr);
1081
1082 run->exit_reason = KVM_EXIT_DEBUG;
1083 kvmppc_account_exit(vcpu, DEBUG_EXITS);
1084 r = RESUME_HOST;
1085 break;
1086 }
1087
1088 default:
1089 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
1090 BUG();
1091 }
1092
1093 /*
1094 * To avoid clobbering exit_reason, only check for signals if we
1095 * aren't already exiting to userspace for some other reason.
1096 */
1097 if (!(r & RESUME_HOST)) {
1098 local_irq_disable();
1099 s = kvmppc_prepare_to_enter(vcpu);
1100 if (s <= 0) {
1101 local_irq_enable();
1102 r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
1103 } else {
1104 kvmppc_lazy_ee_enable();
1105 }
1106 }
1107
1108 return r;
1109 }
1110
1111 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
1112 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1113 {
1114 int i;
1115 int r;
1116
1117 vcpu->arch.pc = 0;
1118 vcpu->arch.shared->pir = vcpu->vcpu_id;
1119 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
1120 kvmppc_set_msr(vcpu, 0);
1121
1122 #ifndef CONFIG_KVM_BOOKE_HV
1123 vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
1124 vcpu->arch.shadow_pid = 1;
1125 vcpu->arch.shared->msr = 0;
1126 #endif
1127
1128 /* Eye-catching numbers so we know if the guest takes an interrupt
1129 * before it's programmed its own IVPR/IVORs. */
1130 vcpu->arch.ivpr = 0x55550000;
1131 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
1132 vcpu->arch.ivor[i] = 0x7700 | i * 4;
1133
1134 kvmppc_init_timing_stats(vcpu);
1135
1136 r = kvmppc_core_vcpu_setup(vcpu);
1137 kvmppc_sanity_check(vcpu);
1138 return r;
1139 }
1140
1141 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
1142 {
1143 /* setup watchdog timer once */
1144 spin_lock_init(&vcpu->arch.wdt_lock);
1145 setup_timer(&vcpu->arch.wdt_timer, kvmppc_watchdog_func,
1146 (unsigned long)vcpu);
1147
1148 return 0;
1149 }
1150
1151 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
1152 {
1153 del_timer_sync(&vcpu->arch.wdt_timer);
1154 }
1155
1156 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1157 {
1158 int i;
1159
1160 regs->pc = vcpu->arch.pc;
1161 regs->cr = kvmppc_get_cr(vcpu);
1162 regs->ctr = vcpu->arch.ctr;
1163 regs->lr = vcpu->arch.lr;
1164 regs->xer = kvmppc_get_xer(vcpu);
1165 regs->msr = vcpu->arch.shared->msr;
1166 regs->srr0 = vcpu->arch.shared->srr0;
1167 regs->srr1 = vcpu->arch.shared->srr1;
1168 regs->pid = vcpu->arch.pid;
1169 regs->sprg0 = vcpu->arch.shared->sprg0;
1170 regs->sprg1 = vcpu->arch.shared->sprg1;
1171 regs->sprg2 = vcpu->arch.shared->sprg2;
1172 regs->sprg3 = vcpu->arch.shared->sprg3;
1173 regs->sprg4 = vcpu->arch.shared->sprg4;
1174 regs->sprg5 = vcpu->arch.shared->sprg5;
1175 regs->sprg6 = vcpu->arch.shared->sprg6;
1176 regs->sprg7 = vcpu->arch.shared->sprg7;
1177
1178 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1179 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1180
1181 return 0;
1182 }
1183
1184 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1185 {
1186 int i;
1187
1188 vcpu->arch.pc = regs->pc;
1189 kvmppc_set_cr(vcpu, regs->cr);
1190 vcpu->arch.ctr = regs->ctr;
1191 vcpu->arch.lr = regs->lr;
1192 kvmppc_set_xer(vcpu, regs->xer);
1193 kvmppc_set_msr(vcpu, regs->msr);
1194 vcpu->arch.shared->srr0 = regs->srr0;
1195 vcpu->arch.shared->srr1 = regs->srr1;
1196 kvmppc_set_pid(vcpu, regs->pid);
1197 vcpu->arch.shared->sprg0 = regs->sprg0;
1198 vcpu->arch.shared->sprg1 = regs->sprg1;
1199 vcpu->arch.shared->sprg2 = regs->sprg2;
1200 vcpu->arch.shared->sprg3 = regs->sprg3;
1201 vcpu->arch.shared->sprg4 = regs->sprg4;
1202 vcpu->arch.shared->sprg5 = regs->sprg5;
1203 vcpu->arch.shared->sprg6 = regs->sprg6;
1204 vcpu->arch.shared->sprg7 = regs->sprg7;
1205
1206 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1207 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1208
1209 return 0;
1210 }
1211
1212 static void get_sregs_base(struct kvm_vcpu *vcpu,
1213 struct kvm_sregs *sregs)
1214 {
1215 u64 tb = get_tb();
1216
1217 sregs->u.e.features |= KVM_SREGS_E_BASE;
1218
1219 sregs->u.e.csrr0 = vcpu->arch.csrr0;
1220 sregs->u.e.csrr1 = vcpu->arch.csrr1;
1221 sregs->u.e.mcsr = vcpu->arch.mcsr;
1222 sregs->u.e.esr = get_guest_esr(vcpu);
1223 sregs->u.e.dear = get_guest_dear(vcpu);
1224 sregs->u.e.tsr = vcpu->arch.tsr;
1225 sregs->u.e.tcr = vcpu->arch.tcr;
1226 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1227 sregs->u.e.tb = tb;
1228 sregs->u.e.vrsave = vcpu->arch.vrsave;
1229 }
1230
1231 static int set_sregs_base(struct kvm_vcpu *vcpu,
1232 struct kvm_sregs *sregs)
1233 {
1234 if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1235 return 0;
1236
1237 vcpu->arch.csrr0 = sregs->u.e.csrr0;
1238 vcpu->arch.csrr1 = sregs->u.e.csrr1;
1239 vcpu->arch.mcsr = sregs->u.e.mcsr;
1240 set_guest_esr(vcpu, sregs->u.e.esr);
1241 set_guest_dear(vcpu, sregs->u.e.dear);
1242 vcpu->arch.vrsave = sregs->u.e.vrsave;
1243 kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1244
1245 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1246 vcpu->arch.dec = sregs->u.e.dec;
1247 kvmppc_emulate_dec(vcpu);
1248 }
1249
1250 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) {
1251 u32 old_tsr = vcpu->arch.tsr;
1252
1253 vcpu->arch.tsr = sregs->u.e.tsr;
1254
1255 if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS))
1256 arm_next_watchdog(vcpu);
1257
1258 update_timer_ints(vcpu);
1259 }
1260
1261 return 0;
1262 }
1263
1264 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1265 struct kvm_sregs *sregs)
1266 {
1267 sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1268
1269 sregs->u.e.pir = vcpu->vcpu_id;
1270 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1271 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1272 sregs->u.e.decar = vcpu->arch.decar;
1273 sregs->u.e.ivpr = vcpu->arch.ivpr;
1274 }
1275
1276 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1277 struct kvm_sregs *sregs)
1278 {
1279 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1280 return 0;
1281
1282 if (sregs->u.e.pir != vcpu->vcpu_id)
1283 return -EINVAL;
1284
1285 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1286 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1287 vcpu->arch.decar = sregs->u.e.decar;
1288 vcpu->arch.ivpr = sregs->u.e.ivpr;
1289
1290 return 0;
1291 }
1292
1293 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1294 {
1295 sregs->u.e.features |= KVM_SREGS_E_IVOR;
1296
1297 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1298 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1299 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1300 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1301 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1302 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1303 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1304 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1305 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1306 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1307 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1308 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1309 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1310 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1311 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1312 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1313 }
1314
1315 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1316 {
1317 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1318 return 0;
1319
1320 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1321 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1322 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1323 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1324 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1325 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1326 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1327 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1328 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1329 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1330 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1331 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1332 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1333 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1334 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1335 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1336
1337 return 0;
1338 }
1339
1340 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1341 struct kvm_sregs *sregs)
1342 {
1343 sregs->pvr = vcpu->arch.pvr;
1344
1345 get_sregs_base(vcpu, sregs);
1346 get_sregs_arch206(vcpu, sregs);
1347 kvmppc_core_get_sregs(vcpu, sregs);
1348 return 0;
1349 }
1350
1351 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1352 struct kvm_sregs *sregs)
1353 {
1354 int ret;
1355
1356 if (vcpu->arch.pvr != sregs->pvr)
1357 return -EINVAL;
1358
1359 ret = set_sregs_base(vcpu, sregs);
1360 if (ret < 0)
1361 return ret;
1362
1363 ret = set_sregs_arch206(vcpu, sregs);
1364 if (ret < 0)
1365 return ret;
1366
1367 return kvmppc_core_set_sregs(vcpu, sregs);
1368 }
1369
1370 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1371 {
1372 int r = -EINVAL;
1373
1374 switch (reg->id) {
1375 case KVM_REG_PPC_IAC1:
1376 case KVM_REG_PPC_IAC2:
1377 case KVM_REG_PPC_IAC3:
1378 case KVM_REG_PPC_IAC4: {
1379 int iac = reg->id - KVM_REG_PPC_IAC1;
1380 r = copy_to_user((u64 __user *)(long)reg->addr,
1381 &vcpu->arch.dbg_reg.iac[iac], sizeof(u64));
1382 break;
1383 }
1384 case KVM_REG_PPC_DAC1:
1385 case KVM_REG_PPC_DAC2: {
1386 int dac = reg->id - KVM_REG_PPC_DAC1;
1387 r = copy_to_user((u64 __user *)(long)reg->addr,
1388 &vcpu->arch.dbg_reg.dac[dac], sizeof(u64));
1389 break;
1390 }
1391 #if defined(CONFIG_64BIT)
1392 case KVM_REG_PPC_EPCR:
1393 r = put_user(vcpu->arch.epcr, (u32 __user *)(long)reg->addr);
1394 break;
1395 #endif
1396 default:
1397 break;
1398 }
1399 return r;
1400 }
1401
1402 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1403 {
1404 int r = -EINVAL;
1405
1406 switch (reg->id) {
1407 case KVM_REG_PPC_IAC1:
1408 case KVM_REG_PPC_IAC2:
1409 case KVM_REG_PPC_IAC3:
1410 case KVM_REG_PPC_IAC4: {
1411 int iac = reg->id - KVM_REG_PPC_IAC1;
1412 r = copy_from_user(&vcpu->arch.dbg_reg.iac[iac],
1413 (u64 __user *)(long)reg->addr, sizeof(u64));
1414 break;
1415 }
1416 case KVM_REG_PPC_DAC1:
1417 case KVM_REG_PPC_DAC2: {
1418 int dac = reg->id - KVM_REG_PPC_DAC1;
1419 r = copy_from_user(&vcpu->arch.dbg_reg.dac[dac],
1420 (u64 __user *)(long)reg->addr, sizeof(u64));
1421 break;
1422 }
1423 #if defined(CONFIG_64BIT)
1424 case KVM_REG_PPC_EPCR: {
1425 u32 new_epcr;
1426 r = get_user(new_epcr, (u32 __user *)(long)reg->addr);
1427 if (r == 0)
1428 kvmppc_set_epcr(vcpu, new_epcr);
1429 break;
1430 }
1431 #endif
1432 default:
1433 break;
1434 }
1435 return r;
1436 }
1437
1438 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1439 {
1440 return -ENOTSUPP;
1441 }
1442
1443 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1444 {
1445 return -ENOTSUPP;
1446 }
1447
1448 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1449 struct kvm_translation *tr)
1450 {
1451 int r;
1452
1453 r = kvmppc_core_vcpu_translate(vcpu, tr);
1454 return r;
1455 }
1456
1457 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1458 {
1459 return -ENOTSUPP;
1460 }
1461
1462 void kvmppc_core_free_memslot(struct kvm_memory_slot *free,
1463 struct kvm_memory_slot *dont)
1464 {
1465 }
1466
1467 int kvmppc_core_create_memslot(struct kvm_memory_slot *slot,
1468 unsigned long npages)
1469 {
1470 return 0;
1471 }
1472
1473 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1474 struct kvm_memory_slot *memslot,
1475 struct kvm_userspace_memory_region *mem)
1476 {
1477 return 0;
1478 }
1479
1480 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1481 struct kvm_userspace_memory_region *mem,
1482 struct kvm_memory_slot old)
1483 {
1484 }
1485
1486 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
1487 {
1488 }
1489
1490 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr)
1491 {
1492 #if defined(CONFIG_64BIT)
1493 vcpu->arch.epcr = new_epcr;
1494 #ifdef CONFIG_KVM_BOOKE_HV
1495 vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM;
1496 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
1497 vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM;
1498 #endif
1499 #endif
1500 }
1501
1502 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1503 {
1504 vcpu->arch.tcr = new_tcr;
1505 arm_next_watchdog(vcpu);
1506 update_timer_ints(vcpu);
1507 }
1508
1509 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1510 {
1511 set_bits(tsr_bits, &vcpu->arch.tsr);
1512 smp_wmb();
1513 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1514 kvm_vcpu_kick(vcpu);
1515 }
1516
1517 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1518 {
1519 clear_bits(tsr_bits, &vcpu->arch.tsr);
1520
1521 /*
1522 * We may have stopped the watchdog due to
1523 * being stuck on final expiration.
1524 */
1525 if (tsr_bits & (TSR_ENW | TSR_WIS))
1526 arm_next_watchdog(vcpu);
1527
1528 update_timer_ints(vcpu);
1529 }
1530
1531 void kvmppc_decrementer_func(unsigned long data)
1532 {
1533 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
1534
1535 if (vcpu->arch.tcr & TCR_ARE) {
1536 vcpu->arch.dec = vcpu->arch.decar;
1537 kvmppc_emulate_dec(vcpu);
1538 }
1539
1540 kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1541 }
1542
1543 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1544 {
1545 vcpu->cpu = smp_processor_id();
1546 current->thread.kvm_vcpu = vcpu;
1547 }
1548
1549 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
1550 {
1551 current->thread.kvm_vcpu = NULL;
1552 vcpu->cpu = -1;
1553 }
1554
1555 int __init kvmppc_booke_init(void)
1556 {
1557 #ifndef CONFIG_KVM_BOOKE_HV
1558 unsigned long ivor[16];
1559 unsigned long max_ivor = 0;
1560 int i;
1561
1562 /* We install our own exception handlers by hijacking IVPR. IVPR must
1563 * be 16-bit aligned, so we need a 64KB allocation. */
1564 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
1565 VCPU_SIZE_ORDER);
1566 if (!kvmppc_booke_handlers)
1567 return -ENOMEM;
1568
1569 /* XXX make sure our handlers are smaller than Linux's */
1570
1571 /* Copy our interrupt handlers to match host IVORs. That way we don't
1572 * have to swap the IVORs on every guest/host transition. */
1573 ivor[0] = mfspr(SPRN_IVOR0);
1574 ivor[1] = mfspr(SPRN_IVOR1);
1575 ivor[2] = mfspr(SPRN_IVOR2);
1576 ivor[3] = mfspr(SPRN_IVOR3);
1577 ivor[4] = mfspr(SPRN_IVOR4);
1578 ivor[5] = mfspr(SPRN_IVOR5);
1579 ivor[6] = mfspr(SPRN_IVOR6);
1580 ivor[7] = mfspr(SPRN_IVOR7);
1581 ivor[8] = mfspr(SPRN_IVOR8);
1582 ivor[9] = mfspr(SPRN_IVOR9);
1583 ivor[10] = mfspr(SPRN_IVOR10);
1584 ivor[11] = mfspr(SPRN_IVOR11);
1585 ivor[12] = mfspr(SPRN_IVOR12);
1586 ivor[13] = mfspr(SPRN_IVOR13);
1587 ivor[14] = mfspr(SPRN_IVOR14);
1588 ivor[15] = mfspr(SPRN_IVOR15);
1589
1590 for (i = 0; i < 16; i++) {
1591 if (ivor[i] > max_ivor)
1592 max_ivor = ivor[i];
1593
1594 memcpy((void *)kvmppc_booke_handlers + ivor[i],
1595 kvmppc_handlers_start + i * kvmppc_handler_len,
1596 kvmppc_handler_len);
1597 }
1598 flush_icache_range(kvmppc_booke_handlers,
1599 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
1600 #endif /* !BOOKE_HV */
1601 return 0;
1602 }
1603
1604 void __exit kvmppc_booke_exit(void)
1605 {
1606 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
1607 kvm_exit();
1608 }
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