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Merge branch 'devel'
[deliverable/linux.git] / arch / powerpc / kvm / booke.c
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
40 #include "timing.h"
41 #include "booke.h"
42
43 unsigned long kvmppc_booke_handlers;
44
45 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
46 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
47
48 struct kvm_stats_debugfs_item debugfs_entries[] = {
49 { "mmio", VCPU_STAT(mmio_exits) },
50 { "dcr", VCPU_STAT(dcr_exits) },
51 { "sig", VCPU_STAT(signal_exits) },
52 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
53 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
54 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) },
55 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) },
56 { "sysc", VCPU_STAT(syscall_exits) },
57 { "isi", VCPU_STAT(isi_exits) },
58 { "dsi", VCPU_STAT(dsi_exits) },
59 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
60 { "dec", VCPU_STAT(dec_exits) },
61 { "ext_intr", VCPU_STAT(ext_intr_exits) },
62 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
63 { "doorbell", VCPU_STAT(dbell_exits) },
64 { "guest doorbell", VCPU_STAT(gdbell_exits) },
65 { NULL }
66 };
67
68 /* TODO: use vcpu_printf() */
69 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
70 {
71 int i;
72
73 printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
74 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
75 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
76 vcpu->arch.shared->srr1);
77
78 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
79
80 for (i = 0; i < 32; i += 4) {
81 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
82 kvmppc_get_gpr(vcpu, i),
83 kvmppc_get_gpr(vcpu, i+1),
84 kvmppc_get_gpr(vcpu, i+2),
85 kvmppc_get_gpr(vcpu, i+3));
86 }
87 }
88
89 #ifdef CONFIG_SPE
90 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
91 {
92 preempt_disable();
93 enable_kernel_spe();
94 kvmppc_save_guest_spe(vcpu);
95 vcpu->arch.shadow_msr &= ~MSR_SPE;
96 preempt_enable();
97 }
98
99 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
100 {
101 preempt_disable();
102 enable_kernel_spe();
103 kvmppc_load_guest_spe(vcpu);
104 vcpu->arch.shadow_msr |= MSR_SPE;
105 preempt_enable();
106 }
107
108 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
109 {
110 if (vcpu->arch.shared->msr & MSR_SPE) {
111 if (!(vcpu->arch.shadow_msr & MSR_SPE))
112 kvmppc_vcpu_enable_spe(vcpu);
113 } else if (vcpu->arch.shadow_msr & MSR_SPE) {
114 kvmppc_vcpu_disable_spe(vcpu);
115 }
116 }
117 #else
118 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
119 {
120 }
121 #endif
122
123 /*
124 * Helper function for "full" MSR writes. No need to call this if only
125 * EE/CE/ME/DE/RI are changing.
126 */
127 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
128 {
129 u32 old_msr = vcpu->arch.shared->msr;
130
131 #ifdef CONFIG_KVM_BOOKE_HV
132 new_msr |= MSR_GS;
133 #endif
134
135 vcpu->arch.shared->msr = new_msr;
136
137 kvmppc_mmu_msr_notify(vcpu, old_msr);
138 kvmppc_vcpu_sync_spe(vcpu);
139 }
140
141 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
142 unsigned int priority)
143 {
144 set_bit(priority, &vcpu->arch.pending_exceptions);
145 }
146
147 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
148 ulong dear_flags, ulong esr_flags)
149 {
150 vcpu->arch.queued_dear = dear_flags;
151 vcpu->arch.queued_esr = esr_flags;
152 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
153 }
154
155 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
156 ulong dear_flags, ulong esr_flags)
157 {
158 vcpu->arch.queued_dear = dear_flags;
159 vcpu->arch.queued_esr = esr_flags;
160 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
161 }
162
163 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
164 ulong esr_flags)
165 {
166 vcpu->arch.queued_esr = esr_flags;
167 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
168 }
169
170 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
171 {
172 vcpu->arch.queued_esr = esr_flags;
173 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
174 }
175
176 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
177 {
178 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
179 }
180
181 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
182 {
183 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
184 }
185
186 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
187 {
188 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
189 }
190
191 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
192 struct kvm_interrupt *irq)
193 {
194 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
195
196 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
197 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
198
199 kvmppc_booke_queue_irqprio(vcpu, prio);
200 }
201
202 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
203 struct kvm_interrupt *irq)
204 {
205 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
206 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
207 }
208
209 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
210 {
211 #ifdef CONFIG_KVM_BOOKE_HV
212 mtspr(SPRN_GSRR0, srr0);
213 mtspr(SPRN_GSRR1, srr1);
214 #else
215 vcpu->arch.shared->srr0 = srr0;
216 vcpu->arch.shared->srr1 = srr1;
217 #endif
218 }
219
220 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
221 {
222 vcpu->arch.csrr0 = srr0;
223 vcpu->arch.csrr1 = srr1;
224 }
225
226 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
227 {
228 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
229 vcpu->arch.dsrr0 = srr0;
230 vcpu->arch.dsrr1 = srr1;
231 } else {
232 set_guest_csrr(vcpu, srr0, srr1);
233 }
234 }
235
236 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
237 {
238 vcpu->arch.mcsrr0 = srr0;
239 vcpu->arch.mcsrr1 = srr1;
240 }
241
242 static unsigned long get_guest_dear(struct kvm_vcpu *vcpu)
243 {
244 #ifdef CONFIG_KVM_BOOKE_HV
245 return mfspr(SPRN_GDEAR);
246 #else
247 return vcpu->arch.shared->dar;
248 #endif
249 }
250
251 static void set_guest_dear(struct kvm_vcpu *vcpu, unsigned long dear)
252 {
253 #ifdef CONFIG_KVM_BOOKE_HV
254 mtspr(SPRN_GDEAR, dear);
255 #else
256 vcpu->arch.shared->dar = dear;
257 #endif
258 }
259
260 static unsigned long get_guest_esr(struct kvm_vcpu *vcpu)
261 {
262 #ifdef CONFIG_KVM_BOOKE_HV
263 return mfspr(SPRN_GESR);
264 #else
265 return vcpu->arch.shared->esr;
266 #endif
267 }
268
269 static void set_guest_esr(struct kvm_vcpu *vcpu, u32 esr)
270 {
271 #ifdef CONFIG_KVM_BOOKE_HV
272 mtspr(SPRN_GESR, esr);
273 #else
274 vcpu->arch.shared->esr = esr;
275 #endif
276 }
277
278 /* Deliver the interrupt of the corresponding priority, if possible. */
279 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
280 unsigned int priority)
281 {
282 int allowed = 0;
283 ulong msr_mask = 0;
284 bool update_esr = false, update_dear = false;
285 ulong crit_raw = vcpu->arch.shared->critical;
286 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
287 bool crit;
288 bool keep_irq = false;
289 enum int_class int_class;
290
291 /* Truncate crit indicators in 32 bit mode */
292 if (!(vcpu->arch.shared->msr & MSR_SF)) {
293 crit_raw &= 0xffffffff;
294 crit_r1 &= 0xffffffff;
295 }
296
297 /* Critical section when crit == r1 */
298 crit = (crit_raw == crit_r1);
299 /* ... and we're in supervisor mode */
300 crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
301
302 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
303 priority = BOOKE_IRQPRIO_EXTERNAL;
304 keep_irq = true;
305 }
306
307 switch (priority) {
308 case BOOKE_IRQPRIO_DTLB_MISS:
309 case BOOKE_IRQPRIO_DATA_STORAGE:
310 update_dear = true;
311 /* fall through */
312 case BOOKE_IRQPRIO_INST_STORAGE:
313 case BOOKE_IRQPRIO_PROGRAM:
314 update_esr = true;
315 /* fall through */
316 case BOOKE_IRQPRIO_ITLB_MISS:
317 case BOOKE_IRQPRIO_SYSCALL:
318 case BOOKE_IRQPRIO_FP_UNAVAIL:
319 case BOOKE_IRQPRIO_SPE_UNAVAIL:
320 case BOOKE_IRQPRIO_SPE_FP_DATA:
321 case BOOKE_IRQPRIO_SPE_FP_ROUND:
322 case BOOKE_IRQPRIO_AP_UNAVAIL:
323 case BOOKE_IRQPRIO_ALIGNMENT:
324 allowed = 1;
325 msr_mask = MSR_CE | MSR_ME | MSR_DE;
326 int_class = INT_CLASS_NONCRIT;
327 break;
328 case BOOKE_IRQPRIO_CRITICAL:
329 case BOOKE_IRQPRIO_DBELL_CRIT:
330 allowed = vcpu->arch.shared->msr & MSR_CE;
331 allowed = allowed && !crit;
332 msr_mask = MSR_ME;
333 int_class = INT_CLASS_CRIT;
334 break;
335 case BOOKE_IRQPRIO_MACHINE_CHECK:
336 allowed = vcpu->arch.shared->msr & MSR_ME;
337 allowed = allowed && !crit;
338 int_class = INT_CLASS_MC;
339 break;
340 case BOOKE_IRQPRIO_DECREMENTER:
341 case BOOKE_IRQPRIO_FIT:
342 keep_irq = true;
343 /* fall through */
344 case BOOKE_IRQPRIO_EXTERNAL:
345 case BOOKE_IRQPRIO_DBELL:
346 allowed = vcpu->arch.shared->msr & MSR_EE;
347 allowed = allowed && !crit;
348 msr_mask = MSR_CE | MSR_ME | MSR_DE;
349 int_class = INT_CLASS_NONCRIT;
350 break;
351 case BOOKE_IRQPRIO_DEBUG:
352 allowed = vcpu->arch.shared->msr & MSR_DE;
353 allowed = allowed && !crit;
354 msr_mask = MSR_ME;
355 int_class = INT_CLASS_CRIT;
356 break;
357 }
358
359 if (allowed) {
360 switch (int_class) {
361 case INT_CLASS_NONCRIT:
362 set_guest_srr(vcpu, vcpu->arch.pc,
363 vcpu->arch.shared->msr);
364 break;
365 case INT_CLASS_CRIT:
366 set_guest_csrr(vcpu, vcpu->arch.pc,
367 vcpu->arch.shared->msr);
368 break;
369 case INT_CLASS_DBG:
370 set_guest_dsrr(vcpu, vcpu->arch.pc,
371 vcpu->arch.shared->msr);
372 break;
373 case INT_CLASS_MC:
374 set_guest_mcsrr(vcpu, vcpu->arch.pc,
375 vcpu->arch.shared->msr);
376 break;
377 }
378
379 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
380 if (update_esr == true)
381 set_guest_esr(vcpu, vcpu->arch.queued_esr);
382 if (update_dear == true)
383 set_guest_dear(vcpu, vcpu->arch.queued_dear);
384 kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
385
386 if (!keep_irq)
387 clear_bit(priority, &vcpu->arch.pending_exceptions);
388 }
389
390 #ifdef CONFIG_KVM_BOOKE_HV
391 /*
392 * If an interrupt is pending but masked, raise a guest doorbell
393 * so that we are notified when the guest enables the relevant
394 * MSR bit.
395 */
396 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
397 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
398 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
399 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
400 if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
401 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
402 #endif
403
404 return allowed;
405 }
406
407 static void update_timer_ints(struct kvm_vcpu *vcpu)
408 {
409 if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
410 kvmppc_core_queue_dec(vcpu);
411 else
412 kvmppc_core_dequeue_dec(vcpu);
413 }
414
415 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
416 {
417 unsigned long *pending = &vcpu->arch.pending_exceptions;
418 unsigned int priority;
419
420 if (vcpu->requests) {
421 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) {
422 smp_mb();
423 update_timer_ints(vcpu);
424 }
425 }
426
427 priority = __ffs(*pending);
428 while (priority < BOOKE_IRQPRIO_MAX) {
429 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
430 break;
431
432 priority = find_next_bit(pending,
433 BITS_PER_BYTE * sizeof(*pending),
434 priority + 1);
435 }
436
437 /* Tell the guest about our interrupt status */
438 vcpu->arch.shared->int_pending = !!*pending;
439 }
440
441 /* Check pending exceptions and deliver one, if possible. */
442 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
443 {
444 int r = 0;
445 WARN_ON_ONCE(!irqs_disabled());
446
447 kvmppc_core_check_exceptions(vcpu);
448
449 if (vcpu->arch.shared->msr & MSR_WE) {
450 local_irq_enable();
451 kvm_vcpu_block(vcpu);
452 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
453 local_irq_disable();
454
455 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
456 r = 1;
457 };
458
459 return r;
460 }
461
462 /*
463 * Common checks before entering the guest world. Call with interrupts
464 * disabled.
465 *
466 * returns !0 if a signal is pending and check_signal is true
467 */
468 static int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
469 {
470 int r = 0;
471
472 WARN_ON_ONCE(!irqs_disabled());
473 while (true) {
474 if (need_resched()) {
475 local_irq_enable();
476 cond_resched();
477 local_irq_disable();
478 continue;
479 }
480
481 if (signal_pending(current)) {
482 r = 1;
483 break;
484 }
485
486 if (kvmppc_core_prepare_to_enter(vcpu)) {
487 /* interrupts got enabled in between, so we
488 are back at square 1 */
489 continue;
490 }
491
492 break;
493 }
494
495 return r;
496 }
497
498 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
499 {
500 int ret;
501 #ifdef CONFIG_PPC_FPU
502 unsigned int fpscr;
503 int fpexc_mode;
504 u64 fpr[32];
505 #endif
506
507 if (!vcpu->arch.sane) {
508 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
509 return -EINVAL;
510 }
511
512 local_irq_disable();
513 if (kvmppc_prepare_to_enter(vcpu)) {
514 kvm_run->exit_reason = KVM_EXIT_INTR;
515 ret = -EINTR;
516 goto out;
517 }
518
519 kvm_guest_enter();
520
521 #ifdef CONFIG_PPC_FPU
522 /* Save userspace FPU state in stack */
523 enable_kernel_fp();
524 memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
525 fpscr = current->thread.fpscr.val;
526 fpexc_mode = current->thread.fpexc_mode;
527
528 /* Restore guest FPU state to thread */
529 memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr));
530 current->thread.fpscr.val = vcpu->arch.fpscr;
531
532 /*
533 * Since we can't trap on MSR_FP in GS-mode, we consider the guest
534 * as always using the FPU. Kernel usage of FP (via
535 * enable_kernel_fp()) in this thread must not occur while
536 * vcpu->fpu_active is set.
537 */
538 vcpu->fpu_active = 1;
539
540 kvmppc_load_guest_fp(vcpu);
541 #endif
542
543 ret = __kvmppc_vcpu_run(kvm_run, vcpu);
544
545 #ifdef CONFIG_PPC_FPU
546 kvmppc_save_guest_fp(vcpu);
547
548 vcpu->fpu_active = 0;
549
550 /* Save guest FPU state from thread */
551 memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr));
552 vcpu->arch.fpscr = current->thread.fpscr.val;
553
554 /* Restore userspace FPU state from stack */
555 memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
556 current->thread.fpscr.val = fpscr;
557 current->thread.fpexc_mode = fpexc_mode;
558 #endif
559
560 kvm_guest_exit();
561
562 out:
563 local_irq_enable();
564 return ret;
565 }
566
567 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
568 {
569 enum emulation_result er;
570
571 er = kvmppc_emulate_instruction(run, vcpu);
572 switch (er) {
573 case EMULATE_DONE:
574 /* don't overwrite subtypes, just account kvm_stats */
575 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
576 /* Future optimization: only reload non-volatiles if
577 * they were actually modified by emulation. */
578 return RESUME_GUEST_NV;
579
580 case EMULATE_DO_DCR:
581 run->exit_reason = KVM_EXIT_DCR;
582 return RESUME_HOST;
583
584 case EMULATE_FAIL:
585 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
586 __func__, vcpu->arch.pc, vcpu->arch.last_inst);
587 /* For debugging, encode the failing instruction and
588 * report it to userspace. */
589 run->hw.hardware_exit_reason = ~0ULL << 32;
590 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
591 kvmppc_core_queue_program(vcpu, ESR_PIL);
592 return RESUME_HOST;
593
594 default:
595 BUG();
596 }
597 }
598
599 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
600 {
601 ulong r1, ip, msr, lr;
602
603 asm("mr %0, 1" : "=r"(r1));
604 asm("mflr %0" : "=r"(lr));
605 asm("mfmsr %0" : "=r"(msr));
606 asm("bl 1f; 1: mflr %0" : "=r"(ip));
607
608 memset(regs, 0, sizeof(*regs));
609 regs->gpr[1] = r1;
610 regs->nip = ip;
611 regs->msr = msr;
612 regs->link = lr;
613 }
614
615 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
616 unsigned int exit_nr)
617 {
618 struct pt_regs regs;
619
620 switch (exit_nr) {
621 case BOOKE_INTERRUPT_EXTERNAL:
622 kvmppc_fill_pt_regs(&regs);
623 do_IRQ(&regs);
624 break;
625 case BOOKE_INTERRUPT_DECREMENTER:
626 kvmppc_fill_pt_regs(&regs);
627 timer_interrupt(&regs);
628 break;
629 #if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64)
630 case BOOKE_INTERRUPT_DOORBELL:
631 kvmppc_fill_pt_regs(&regs);
632 doorbell_exception(&regs);
633 break;
634 #endif
635 case BOOKE_INTERRUPT_MACHINE_CHECK:
636 /* FIXME */
637 break;
638 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
639 kvmppc_fill_pt_regs(&regs);
640 performance_monitor_exception(&regs);
641 break;
642 }
643 }
644
645 /**
646 * kvmppc_handle_exit
647 *
648 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
649 */
650 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
651 unsigned int exit_nr)
652 {
653 int r = RESUME_HOST;
654
655 /* update before a new last_exit_type is rewritten */
656 kvmppc_update_timing_stats(vcpu);
657
658 /* restart interrupts if they were meant for the host */
659 kvmppc_restart_interrupt(vcpu, exit_nr);
660
661 local_irq_enable();
662
663 run->exit_reason = KVM_EXIT_UNKNOWN;
664 run->ready_for_interrupt_injection = 1;
665
666 switch (exit_nr) {
667 case BOOKE_INTERRUPT_MACHINE_CHECK:
668 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
669 kvmppc_dump_vcpu(vcpu);
670 /* For debugging, send invalid exit reason to user space */
671 run->hw.hardware_exit_reason = ~1ULL << 32;
672 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
673 r = RESUME_HOST;
674 break;
675
676 case BOOKE_INTERRUPT_EXTERNAL:
677 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
678 r = RESUME_GUEST;
679 break;
680
681 case BOOKE_INTERRUPT_DECREMENTER:
682 kvmppc_account_exit(vcpu, DEC_EXITS);
683 r = RESUME_GUEST;
684 break;
685
686 case BOOKE_INTERRUPT_DOORBELL:
687 kvmppc_account_exit(vcpu, DBELL_EXITS);
688 r = RESUME_GUEST;
689 break;
690
691 case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
692 kvmppc_account_exit(vcpu, GDBELL_EXITS);
693
694 /*
695 * We are here because there is a pending guest interrupt
696 * which could not be delivered as MSR_CE or MSR_ME was not
697 * set. Once we break from here we will retry delivery.
698 */
699 r = RESUME_GUEST;
700 break;
701
702 case BOOKE_INTERRUPT_GUEST_DBELL:
703 kvmppc_account_exit(vcpu, GDBELL_EXITS);
704
705 /*
706 * We are here because there is a pending guest interrupt
707 * which could not be delivered as MSR_EE was not set. Once
708 * we break from here we will retry delivery.
709 */
710 r = RESUME_GUEST;
711 break;
712
713 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
714 r = RESUME_GUEST;
715 break;
716
717 case BOOKE_INTERRUPT_HV_PRIV:
718 r = emulation_exit(run, vcpu);
719 break;
720
721 case BOOKE_INTERRUPT_PROGRAM:
722 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
723 /*
724 * Program traps generated by user-level software must
725 * be handled by the guest kernel.
726 *
727 * In GS mode, hypervisor privileged instructions trap
728 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
729 * actual program interrupts, handled by the guest.
730 */
731 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
732 r = RESUME_GUEST;
733 kvmppc_account_exit(vcpu, USR_PR_INST);
734 break;
735 }
736
737 r = emulation_exit(run, vcpu);
738 break;
739
740 case BOOKE_INTERRUPT_FP_UNAVAIL:
741 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
742 kvmppc_account_exit(vcpu, FP_UNAVAIL);
743 r = RESUME_GUEST;
744 break;
745
746 #ifdef CONFIG_SPE
747 case BOOKE_INTERRUPT_SPE_UNAVAIL: {
748 if (vcpu->arch.shared->msr & MSR_SPE)
749 kvmppc_vcpu_enable_spe(vcpu);
750 else
751 kvmppc_booke_queue_irqprio(vcpu,
752 BOOKE_IRQPRIO_SPE_UNAVAIL);
753 r = RESUME_GUEST;
754 break;
755 }
756
757 case BOOKE_INTERRUPT_SPE_FP_DATA:
758 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
759 r = RESUME_GUEST;
760 break;
761
762 case BOOKE_INTERRUPT_SPE_FP_ROUND:
763 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
764 r = RESUME_GUEST;
765 break;
766 #else
767 case BOOKE_INTERRUPT_SPE_UNAVAIL:
768 /*
769 * Guest wants SPE, but host kernel doesn't support it. Send
770 * an "unimplemented operation" program check to the guest.
771 */
772 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
773 r = RESUME_GUEST;
774 break;
775
776 /*
777 * These really should never happen without CONFIG_SPE,
778 * as we should never enable the real MSR[SPE] in the guest.
779 */
780 case BOOKE_INTERRUPT_SPE_FP_DATA:
781 case BOOKE_INTERRUPT_SPE_FP_ROUND:
782 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
783 __func__, exit_nr, vcpu->arch.pc);
784 run->hw.hardware_exit_reason = exit_nr;
785 r = RESUME_HOST;
786 break;
787 #endif
788
789 case BOOKE_INTERRUPT_DATA_STORAGE:
790 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
791 vcpu->arch.fault_esr);
792 kvmppc_account_exit(vcpu, DSI_EXITS);
793 r = RESUME_GUEST;
794 break;
795
796 case BOOKE_INTERRUPT_INST_STORAGE:
797 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
798 kvmppc_account_exit(vcpu, ISI_EXITS);
799 r = RESUME_GUEST;
800 break;
801
802 #ifdef CONFIG_KVM_BOOKE_HV
803 case BOOKE_INTERRUPT_HV_SYSCALL:
804 if (!(vcpu->arch.shared->msr & MSR_PR)) {
805 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
806 } else {
807 /*
808 * hcall from guest userspace -- send privileged
809 * instruction program check.
810 */
811 kvmppc_core_queue_program(vcpu, ESR_PPR);
812 }
813
814 r = RESUME_GUEST;
815 break;
816 #else
817 case BOOKE_INTERRUPT_SYSCALL:
818 if (!(vcpu->arch.shared->msr & MSR_PR) &&
819 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
820 /* KVM PV hypercalls */
821 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
822 r = RESUME_GUEST;
823 } else {
824 /* Guest syscalls */
825 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
826 }
827 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
828 r = RESUME_GUEST;
829 break;
830 #endif
831
832 case BOOKE_INTERRUPT_DTLB_MISS: {
833 unsigned long eaddr = vcpu->arch.fault_dear;
834 int gtlb_index;
835 gpa_t gpaddr;
836 gfn_t gfn;
837
838 #ifdef CONFIG_KVM_E500V2
839 if (!(vcpu->arch.shared->msr & MSR_PR) &&
840 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
841 kvmppc_map_magic(vcpu);
842 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
843 r = RESUME_GUEST;
844
845 break;
846 }
847 #endif
848
849 /* Check the guest TLB. */
850 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
851 if (gtlb_index < 0) {
852 /* The guest didn't have a mapping for it. */
853 kvmppc_core_queue_dtlb_miss(vcpu,
854 vcpu->arch.fault_dear,
855 vcpu->arch.fault_esr);
856 kvmppc_mmu_dtlb_miss(vcpu);
857 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
858 r = RESUME_GUEST;
859 break;
860 }
861
862 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
863 gfn = gpaddr >> PAGE_SHIFT;
864
865 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
866 /* The guest TLB had a mapping, but the shadow TLB
867 * didn't, and it is RAM. This could be because:
868 * a) the entry is mapping the host kernel, or
869 * b) the guest used a large mapping which we're faking
870 * Either way, we need to satisfy the fault without
871 * invoking the guest. */
872 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
873 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
874 r = RESUME_GUEST;
875 } else {
876 /* Guest has mapped and accessed a page which is not
877 * actually RAM. */
878 vcpu->arch.paddr_accessed = gpaddr;
879 vcpu->arch.vaddr_accessed = eaddr;
880 r = kvmppc_emulate_mmio(run, vcpu);
881 kvmppc_account_exit(vcpu, MMIO_EXITS);
882 }
883
884 break;
885 }
886
887 case BOOKE_INTERRUPT_ITLB_MISS: {
888 unsigned long eaddr = vcpu->arch.pc;
889 gpa_t gpaddr;
890 gfn_t gfn;
891 int gtlb_index;
892
893 r = RESUME_GUEST;
894
895 /* Check the guest TLB. */
896 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
897 if (gtlb_index < 0) {
898 /* The guest didn't have a mapping for it. */
899 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
900 kvmppc_mmu_itlb_miss(vcpu);
901 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
902 break;
903 }
904
905 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
906
907 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
908 gfn = gpaddr >> PAGE_SHIFT;
909
910 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
911 /* The guest TLB had a mapping, but the shadow TLB
912 * didn't. This could be because:
913 * a) the entry is mapping the host kernel, or
914 * b) the guest used a large mapping which we're faking
915 * Either way, we need to satisfy the fault without
916 * invoking the guest. */
917 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
918 } else {
919 /* Guest mapped and leaped at non-RAM! */
920 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
921 }
922
923 break;
924 }
925
926 case BOOKE_INTERRUPT_DEBUG: {
927 u32 dbsr;
928
929 vcpu->arch.pc = mfspr(SPRN_CSRR0);
930
931 /* clear IAC events in DBSR register */
932 dbsr = mfspr(SPRN_DBSR);
933 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
934 mtspr(SPRN_DBSR, dbsr);
935
936 run->exit_reason = KVM_EXIT_DEBUG;
937 kvmppc_account_exit(vcpu, DEBUG_EXITS);
938 r = RESUME_HOST;
939 break;
940 }
941
942 default:
943 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
944 BUG();
945 }
946
947 /*
948 * To avoid clobbering exit_reason, only check for signals if we
949 * aren't already exiting to userspace for some other reason.
950 */
951 if (!(r & RESUME_HOST)) {
952 local_irq_disable();
953 if (kvmppc_prepare_to_enter(vcpu)) {
954 run->exit_reason = KVM_EXIT_INTR;
955 r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
956 kvmppc_account_exit(vcpu, SIGNAL_EXITS);
957 }
958 }
959
960 return r;
961 }
962
963 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
964 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
965 {
966 int i;
967 int r;
968
969 vcpu->arch.pc = 0;
970 vcpu->arch.shared->pir = vcpu->vcpu_id;
971 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
972 kvmppc_set_msr(vcpu, 0);
973
974 #ifndef CONFIG_KVM_BOOKE_HV
975 vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
976 vcpu->arch.shadow_pid = 1;
977 vcpu->arch.shared->msr = 0;
978 #endif
979
980 /* Eye-catching numbers so we know if the guest takes an interrupt
981 * before it's programmed its own IVPR/IVORs. */
982 vcpu->arch.ivpr = 0x55550000;
983 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
984 vcpu->arch.ivor[i] = 0x7700 | i * 4;
985
986 kvmppc_init_timing_stats(vcpu);
987
988 r = kvmppc_core_vcpu_setup(vcpu);
989 kvmppc_sanity_check(vcpu);
990 return r;
991 }
992
993 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
994 {
995 int i;
996
997 regs->pc = vcpu->arch.pc;
998 regs->cr = kvmppc_get_cr(vcpu);
999 regs->ctr = vcpu->arch.ctr;
1000 regs->lr = vcpu->arch.lr;
1001 regs->xer = kvmppc_get_xer(vcpu);
1002 regs->msr = vcpu->arch.shared->msr;
1003 regs->srr0 = vcpu->arch.shared->srr0;
1004 regs->srr1 = vcpu->arch.shared->srr1;
1005 regs->pid = vcpu->arch.pid;
1006 regs->sprg0 = vcpu->arch.shared->sprg0;
1007 regs->sprg1 = vcpu->arch.shared->sprg1;
1008 regs->sprg2 = vcpu->arch.shared->sprg2;
1009 regs->sprg3 = vcpu->arch.shared->sprg3;
1010 regs->sprg4 = vcpu->arch.shared->sprg4;
1011 regs->sprg5 = vcpu->arch.shared->sprg5;
1012 regs->sprg6 = vcpu->arch.shared->sprg6;
1013 regs->sprg7 = vcpu->arch.shared->sprg7;
1014
1015 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1016 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1017
1018 return 0;
1019 }
1020
1021 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1022 {
1023 int i;
1024
1025 vcpu->arch.pc = regs->pc;
1026 kvmppc_set_cr(vcpu, regs->cr);
1027 vcpu->arch.ctr = regs->ctr;
1028 vcpu->arch.lr = regs->lr;
1029 kvmppc_set_xer(vcpu, regs->xer);
1030 kvmppc_set_msr(vcpu, regs->msr);
1031 vcpu->arch.shared->srr0 = regs->srr0;
1032 vcpu->arch.shared->srr1 = regs->srr1;
1033 kvmppc_set_pid(vcpu, regs->pid);
1034 vcpu->arch.shared->sprg0 = regs->sprg0;
1035 vcpu->arch.shared->sprg1 = regs->sprg1;
1036 vcpu->arch.shared->sprg2 = regs->sprg2;
1037 vcpu->arch.shared->sprg3 = regs->sprg3;
1038 vcpu->arch.shared->sprg4 = regs->sprg4;
1039 vcpu->arch.shared->sprg5 = regs->sprg5;
1040 vcpu->arch.shared->sprg6 = regs->sprg6;
1041 vcpu->arch.shared->sprg7 = regs->sprg7;
1042
1043 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1044 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1045
1046 return 0;
1047 }
1048
1049 static void get_sregs_base(struct kvm_vcpu *vcpu,
1050 struct kvm_sregs *sregs)
1051 {
1052 u64 tb = get_tb();
1053
1054 sregs->u.e.features |= KVM_SREGS_E_BASE;
1055
1056 sregs->u.e.csrr0 = vcpu->arch.csrr0;
1057 sregs->u.e.csrr1 = vcpu->arch.csrr1;
1058 sregs->u.e.mcsr = vcpu->arch.mcsr;
1059 sregs->u.e.esr = get_guest_esr(vcpu);
1060 sregs->u.e.dear = get_guest_dear(vcpu);
1061 sregs->u.e.tsr = vcpu->arch.tsr;
1062 sregs->u.e.tcr = vcpu->arch.tcr;
1063 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1064 sregs->u.e.tb = tb;
1065 sregs->u.e.vrsave = vcpu->arch.vrsave;
1066 }
1067
1068 static int set_sregs_base(struct kvm_vcpu *vcpu,
1069 struct kvm_sregs *sregs)
1070 {
1071 if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1072 return 0;
1073
1074 vcpu->arch.csrr0 = sregs->u.e.csrr0;
1075 vcpu->arch.csrr1 = sregs->u.e.csrr1;
1076 vcpu->arch.mcsr = sregs->u.e.mcsr;
1077 set_guest_esr(vcpu, sregs->u.e.esr);
1078 set_guest_dear(vcpu, sregs->u.e.dear);
1079 vcpu->arch.vrsave = sregs->u.e.vrsave;
1080 kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1081
1082 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1083 vcpu->arch.dec = sregs->u.e.dec;
1084 kvmppc_emulate_dec(vcpu);
1085 }
1086
1087 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) {
1088 vcpu->arch.tsr = sregs->u.e.tsr;
1089 update_timer_ints(vcpu);
1090 }
1091
1092 return 0;
1093 }
1094
1095 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1096 struct kvm_sregs *sregs)
1097 {
1098 sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1099
1100 sregs->u.e.pir = vcpu->vcpu_id;
1101 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1102 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1103 sregs->u.e.decar = vcpu->arch.decar;
1104 sregs->u.e.ivpr = vcpu->arch.ivpr;
1105 }
1106
1107 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1108 struct kvm_sregs *sregs)
1109 {
1110 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1111 return 0;
1112
1113 if (sregs->u.e.pir != vcpu->vcpu_id)
1114 return -EINVAL;
1115
1116 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1117 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1118 vcpu->arch.decar = sregs->u.e.decar;
1119 vcpu->arch.ivpr = sregs->u.e.ivpr;
1120
1121 return 0;
1122 }
1123
1124 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1125 {
1126 sregs->u.e.features |= KVM_SREGS_E_IVOR;
1127
1128 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1129 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1130 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1131 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1132 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1133 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1134 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1135 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1136 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1137 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1138 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1139 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1140 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1141 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1142 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1143 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1144 }
1145
1146 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1147 {
1148 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1149 return 0;
1150
1151 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1152 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1153 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1154 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1155 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1156 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1157 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1158 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1159 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1160 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1161 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1162 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1163 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1164 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1165 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1166 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1167
1168 return 0;
1169 }
1170
1171 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1172 struct kvm_sregs *sregs)
1173 {
1174 sregs->pvr = vcpu->arch.pvr;
1175
1176 get_sregs_base(vcpu, sregs);
1177 get_sregs_arch206(vcpu, sregs);
1178 kvmppc_core_get_sregs(vcpu, sregs);
1179 return 0;
1180 }
1181
1182 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1183 struct kvm_sregs *sregs)
1184 {
1185 int ret;
1186
1187 if (vcpu->arch.pvr != sregs->pvr)
1188 return -EINVAL;
1189
1190 ret = set_sregs_base(vcpu, sregs);
1191 if (ret < 0)
1192 return ret;
1193
1194 ret = set_sregs_arch206(vcpu, sregs);
1195 if (ret < 0)
1196 return ret;
1197
1198 return kvmppc_core_set_sregs(vcpu, sregs);
1199 }
1200
1201 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1202 {
1203 return -EINVAL;
1204 }
1205
1206 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1207 {
1208 return -EINVAL;
1209 }
1210
1211 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1212 {
1213 return -ENOTSUPP;
1214 }
1215
1216 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1217 {
1218 return -ENOTSUPP;
1219 }
1220
1221 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1222 struct kvm_translation *tr)
1223 {
1224 int r;
1225
1226 r = kvmppc_core_vcpu_translate(vcpu, tr);
1227 return r;
1228 }
1229
1230 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1231 {
1232 return -ENOTSUPP;
1233 }
1234
1235 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1236 struct kvm_userspace_memory_region *mem)
1237 {
1238 return 0;
1239 }
1240
1241 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1242 struct kvm_userspace_memory_region *mem)
1243 {
1244 }
1245
1246 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1247 {
1248 vcpu->arch.tcr = new_tcr;
1249 update_timer_ints(vcpu);
1250 }
1251
1252 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1253 {
1254 set_bits(tsr_bits, &vcpu->arch.tsr);
1255 smp_wmb();
1256 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1257 kvm_vcpu_kick(vcpu);
1258 }
1259
1260 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1261 {
1262 clear_bits(tsr_bits, &vcpu->arch.tsr);
1263 update_timer_ints(vcpu);
1264 }
1265
1266 void kvmppc_decrementer_func(unsigned long data)
1267 {
1268 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
1269
1270 kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1271 }
1272
1273 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1274 {
1275 current->thread.kvm_vcpu = vcpu;
1276 }
1277
1278 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
1279 {
1280 current->thread.kvm_vcpu = NULL;
1281 }
1282
1283 int __init kvmppc_booke_init(void)
1284 {
1285 #ifndef CONFIG_KVM_BOOKE_HV
1286 unsigned long ivor[16];
1287 unsigned long max_ivor = 0;
1288 int i;
1289
1290 /* We install our own exception handlers by hijacking IVPR. IVPR must
1291 * be 16-bit aligned, so we need a 64KB allocation. */
1292 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
1293 VCPU_SIZE_ORDER);
1294 if (!kvmppc_booke_handlers)
1295 return -ENOMEM;
1296
1297 /* XXX make sure our handlers are smaller than Linux's */
1298
1299 /* Copy our interrupt handlers to match host IVORs. That way we don't
1300 * have to swap the IVORs on every guest/host transition. */
1301 ivor[0] = mfspr(SPRN_IVOR0);
1302 ivor[1] = mfspr(SPRN_IVOR1);
1303 ivor[2] = mfspr(SPRN_IVOR2);
1304 ivor[3] = mfspr(SPRN_IVOR3);
1305 ivor[4] = mfspr(SPRN_IVOR4);
1306 ivor[5] = mfspr(SPRN_IVOR5);
1307 ivor[6] = mfspr(SPRN_IVOR6);
1308 ivor[7] = mfspr(SPRN_IVOR7);
1309 ivor[8] = mfspr(SPRN_IVOR8);
1310 ivor[9] = mfspr(SPRN_IVOR9);
1311 ivor[10] = mfspr(SPRN_IVOR10);
1312 ivor[11] = mfspr(SPRN_IVOR11);
1313 ivor[12] = mfspr(SPRN_IVOR12);
1314 ivor[13] = mfspr(SPRN_IVOR13);
1315 ivor[14] = mfspr(SPRN_IVOR14);
1316 ivor[15] = mfspr(SPRN_IVOR15);
1317
1318 for (i = 0; i < 16; i++) {
1319 if (ivor[i] > max_ivor)
1320 max_ivor = ivor[i];
1321
1322 memcpy((void *)kvmppc_booke_handlers + ivor[i],
1323 kvmppc_handlers_start + i * kvmppc_handler_len,
1324 kvmppc_handler_len);
1325 }
1326 flush_icache_range(kvmppc_booke_handlers,
1327 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
1328 #endif /* !BOOKE_HV */
1329 return 0;
1330 }
1331
1332 void __exit kvmppc_booke_exit(void)
1333 {
1334 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
1335 kvm_exit();
1336 }
Linux kernel - Deliverables
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