1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright IBM Corp. 2007
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
8 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
9 * Scott Wood <scottwood@freescale.com>
10 * Varun Sethi <varun.sethi@freescale.com>
13 #include <linux/errno.h>
14 #include <linux/err.h>
15 #include <linux/kvm_host.h>
16 #include <linux/gfp.h>
17 #include <linux/module.h>
18 #include <linux/vmalloc.h>
21 #include <asm/cputable.h>
22 #include <linux/uaccess.h>
23 #include <asm/interrupt.h>
24 #include <asm/kvm_ppc.h>
25 #include <asm/cacheflush.h>
26 #include <asm/dbell.h>
27 #include <asm/hw_irq.h>
34 #define CREATE_TRACE_POINTS
35 #include "trace_booke.h"
37 unsigned long kvmppc_booke_handlers;
39 const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
40 KVM_GENERIC_VM_STATS(),
41 STATS_DESC_ICOUNTER(VM, num_2M_pages),
42 STATS_DESC_ICOUNTER(VM, num_1G_pages)
45 const struct kvm_stats_header kvm_vm_stats_header = {
46 .name_size = KVM_STATS_NAME_SIZE,
47 .num_desc = ARRAY_SIZE(kvm_vm_stats_desc),
48 .id_offset = sizeof(struct kvm_stats_header),
49 .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
50 .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
51 sizeof(kvm_vm_stats_desc),
54 const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
55 KVM_GENERIC_VCPU_STATS(),
56 STATS_DESC_COUNTER(VCPU, sum_exits),
57 STATS_DESC_COUNTER(VCPU, mmio_exits),
58 STATS_DESC_COUNTER(VCPU, signal_exits),
59 STATS_DESC_COUNTER(VCPU, light_exits),
60 STATS_DESC_COUNTER(VCPU, itlb_real_miss_exits),
61 STATS_DESC_COUNTER(VCPU, itlb_virt_miss_exits),
62 STATS_DESC_COUNTER(VCPU, dtlb_real_miss_exits),
63 STATS_DESC_COUNTER(VCPU, dtlb_virt_miss_exits),
64 STATS_DESC_COUNTER(VCPU, syscall_exits),
65 STATS_DESC_COUNTER(VCPU, isi_exits),
66 STATS_DESC_COUNTER(VCPU, dsi_exits),
67 STATS_DESC_COUNTER(VCPU, emulated_inst_exits),
68 STATS_DESC_COUNTER(VCPU, dec_exits),
69 STATS_DESC_COUNTER(VCPU, ext_intr_exits),
70 STATS_DESC_COUNTER(VCPU, halt_successful_wait),
71 STATS_DESC_COUNTER(VCPU, dbell_exits),
72 STATS_DESC_COUNTER(VCPU, gdbell_exits),
73 STATS_DESC_COUNTER(VCPU, ld),
74 STATS_DESC_COUNTER(VCPU, st),
75 STATS_DESC_COUNTER(VCPU, pthru_all),
76 STATS_DESC_COUNTER(VCPU, pthru_host),
77 STATS_DESC_COUNTER(VCPU, pthru_bad_aff)
80 const struct kvm_stats_header kvm_vcpu_stats_header = {
81 .name_size = KVM_STATS_NAME_SIZE,
82 .num_desc = ARRAY_SIZE(kvm_vcpu_stats_desc),
83 .id_offset = sizeof(struct kvm_stats_header),
84 .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
85 .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
86 sizeof(kvm_vcpu_stats_desc),
89 /* TODO: use vcpu_printf() */
90 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
94 printk("pc: %08lx msr: %08llx\n", vcpu->arch.regs.nip,
95 vcpu->arch.shared->msr);
96 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.regs.link,
98 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
99 vcpu->arch.shared->srr1);
101 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
103 for (i = 0; i < 32; i += 4) {
104 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
105 kvmppc_get_gpr(vcpu, i),
106 kvmppc_get_gpr(vcpu, i+1),
107 kvmppc_get_gpr(vcpu, i+2),
108 kvmppc_get_gpr(vcpu, i+3));
113 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
117 kvmppc_save_guest_spe(vcpu);
118 disable_kernel_spe();
119 vcpu->arch.shadow_msr &= ~MSR_SPE;
123 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
127 kvmppc_load_guest_spe(vcpu);
128 disable_kernel_spe();
129 vcpu->arch.shadow_msr |= MSR_SPE;
133 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
135 if (vcpu->arch.shared->msr & MSR_SPE) {
136 if (!(vcpu->arch.shadow_msr & MSR_SPE))
137 kvmppc_vcpu_enable_spe(vcpu);
138 } else if (vcpu->arch.shadow_msr & MSR_SPE) {
139 kvmppc_vcpu_disable_spe(vcpu);
143 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
149 * Load up guest vcpu FP state if it's needed.
150 * It also set the MSR_FP in thread so that host know
151 * we're holding FPU, and then host can help to save
152 * guest vcpu FP state if other threads require to use FPU.
153 * This simulates an FP unavailable fault.
155 * It requires to be called with preemption disabled.
157 static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
159 #ifdef CONFIG_PPC_FPU
160 if (!(current->thread.regs->msr & MSR_FP)) {
162 load_fp_state(&vcpu->arch.fp);
164 current->thread.fp_save_area = &vcpu->arch.fp;
165 current->thread.regs->msr |= MSR_FP;
171 * Save guest vcpu FP state into thread.
172 * It requires to be called with preemption disabled.
174 static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
176 #ifdef CONFIG_PPC_FPU
177 if (current->thread.regs->msr & MSR_FP)
179 current->thread.fp_save_area = NULL;
183 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
185 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV)
186 /* We always treat the FP bit as enabled from the host
187 perspective, so only need to adjust the shadow MSR */
188 vcpu->arch.shadow_msr &= ~MSR_FP;
189 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP;
194 * Simulate AltiVec unavailable fault to load guest state
195 * from thread to AltiVec unit.
196 * It requires to be called with preemption disabled.
198 static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu)
200 #ifdef CONFIG_ALTIVEC
201 if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
202 if (!(current->thread.regs->msr & MSR_VEC)) {
203 enable_kernel_altivec();
204 load_vr_state(&vcpu->arch.vr);
205 disable_kernel_altivec();
206 current->thread.vr_save_area = &vcpu->arch.vr;
207 current->thread.regs->msr |= MSR_VEC;
214 * Save guest vcpu AltiVec state into thread.
215 * It requires to be called with preemption disabled.
217 static inline void kvmppc_save_guest_altivec(struct kvm_vcpu *vcpu)
219 #ifdef CONFIG_ALTIVEC
220 if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
221 if (current->thread.regs->msr & MSR_VEC)
222 giveup_altivec(current);
223 current->thread.vr_save_area = NULL;
228 static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu)
230 /* Synchronize guest's desire to get debug interrupts into shadow MSR */
231 #ifndef CONFIG_KVM_BOOKE_HV
232 vcpu->arch.shadow_msr &= ~MSR_DE;
233 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_DE;
236 /* Force enable debug interrupts when user space wants to debug */
237 if (vcpu->guest_debug) {
238 #ifdef CONFIG_KVM_BOOKE_HV
240 * Since there is no shadow MSR, sync MSR_DE into the guest
243 vcpu->arch.shared->msr |= MSR_DE;
245 vcpu->arch.shadow_msr |= MSR_DE;
246 vcpu->arch.shared->msr &= ~MSR_DE;
252 * Helper function for "full" MSR writes. No need to call this if only
253 * EE/CE/ME/DE/RI are changing.
255 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
257 u32 old_msr = vcpu->arch.shared->msr;
259 #ifdef CONFIG_KVM_BOOKE_HV
263 vcpu->arch.shared->msr = new_msr;
265 kvmppc_mmu_msr_notify(vcpu, old_msr);
266 kvmppc_vcpu_sync_spe(vcpu);
267 kvmppc_vcpu_sync_fpu(vcpu);
268 kvmppc_vcpu_sync_debug(vcpu);
271 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
272 unsigned int priority)
274 trace_kvm_booke_queue_irqprio(vcpu, priority);
275 set_bit(priority, &vcpu->arch.pending_exceptions);
278 void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
279 ulong dear_flags, ulong esr_flags)
281 vcpu->arch.queued_dear = dear_flags;
282 vcpu->arch.queued_esr = esr_flags;
283 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
286 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
287 ulong dear_flags, ulong esr_flags)
289 vcpu->arch.queued_dear = dear_flags;
290 vcpu->arch.queued_esr = esr_flags;
291 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
294 void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu)
296 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
299 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong esr_flags)
301 vcpu->arch.queued_esr = esr_flags;
302 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
305 static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags,
308 vcpu->arch.queued_dear = dear_flags;
309 vcpu->arch.queued_esr = esr_flags;
310 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT);
313 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
315 vcpu->arch.queued_esr = esr_flags;
316 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
319 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
321 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
324 #ifdef CONFIG_ALTIVEC
325 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
327 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL);
331 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
333 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
336 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
338 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
341 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
343 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
346 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
347 struct kvm_interrupt *irq)
349 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
351 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
352 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
354 kvmppc_booke_queue_irqprio(vcpu, prio);
357 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
359 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
360 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
363 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu)
365 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG);
368 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu)
370 clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions);
373 void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu)
375 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG);
378 void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu)
380 clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions);
383 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
385 kvmppc_set_srr0(vcpu, srr0);
386 kvmppc_set_srr1(vcpu, srr1);
389 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
391 vcpu->arch.csrr0 = srr0;
392 vcpu->arch.csrr1 = srr1;
395 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
397 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
398 vcpu->arch.dsrr0 = srr0;
399 vcpu->arch.dsrr1 = srr1;
401 set_guest_csrr(vcpu, srr0, srr1);
405 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
407 vcpu->arch.mcsrr0 = srr0;
408 vcpu->arch.mcsrr1 = srr1;
411 /* Deliver the interrupt of the corresponding priority, if possible. */
412 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
413 unsigned int priority)
417 bool update_esr = false, update_dear = false, update_epr = false;
418 ulong crit_raw = vcpu->arch.shared->critical;
419 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
421 bool keep_irq = false;
422 enum int_class int_class;
423 ulong new_msr = vcpu->arch.shared->msr;
425 /* Truncate crit indicators in 32 bit mode */
426 if (!(vcpu->arch.shared->msr & MSR_SF)) {
427 crit_raw &= 0xffffffff;
428 crit_r1 &= 0xffffffff;
431 /* Critical section when crit == r1 */
432 crit = (crit_raw == crit_r1);
433 /* ... and we're in supervisor mode */
434 crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
436 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
437 priority = BOOKE_IRQPRIO_EXTERNAL;
441 if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags)
445 case BOOKE_IRQPRIO_DTLB_MISS:
446 case BOOKE_IRQPRIO_DATA_STORAGE:
447 case BOOKE_IRQPRIO_ALIGNMENT:
450 case BOOKE_IRQPRIO_INST_STORAGE:
451 case BOOKE_IRQPRIO_PROGRAM:
454 case BOOKE_IRQPRIO_ITLB_MISS:
455 case BOOKE_IRQPRIO_SYSCALL:
456 case BOOKE_IRQPRIO_FP_UNAVAIL:
457 #ifdef CONFIG_SPE_POSSIBLE
458 case BOOKE_IRQPRIO_SPE_UNAVAIL:
459 case BOOKE_IRQPRIO_SPE_FP_DATA:
460 case BOOKE_IRQPRIO_SPE_FP_ROUND:
462 #ifdef CONFIG_ALTIVEC
463 case BOOKE_IRQPRIO_ALTIVEC_UNAVAIL:
464 case BOOKE_IRQPRIO_ALTIVEC_ASSIST:
466 case BOOKE_IRQPRIO_AP_UNAVAIL:
468 msr_mask = MSR_CE | MSR_ME | MSR_DE;
469 int_class = INT_CLASS_NONCRIT;
471 case BOOKE_IRQPRIO_WATCHDOG:
472 case BOOKE_IRQPRIO_CRITICAL:
473 case BOOKE_IRQPRIO_DBELL_CRIT:
474 allowed = vcpu->arch.shared->msr & MSR_CE;
475 allowed = allowed && !crit;
477 int_class = INT_CLASS_CRIT;
479 case BOOKE_IRQPRIO_MACHINE_CHECK:
480 allowed = vcpu->arch.shared->msr & MSR_ME;
481 allowed = allowed && !crit;
482 int_class = INT_CLASS_MC;
484 case BOOKE_IRQPRIO_DECREMENTER:
485 case BOOKE_IRQPRIO_FIT:
488 case BOOKE_IRQPRIO_EXTERNAL:
489 case BOOKE_IRQPRIO_DBELL:
490 allowed = vcpu->arch.shared->msr & MSR_EE;
491 allowed = allowed && !crit;
492 msr_mask = MSR_CE | MSR_ME | MSR_DE;
493 int_class = INT_CLASS_NONCRIT;
495 case BOOKE_IRQPRIO_DEBUG:
496 allowed = vcpu->arch.shared->msr & MSR_DE;
497 allowed = allowed && !crit;
499 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC))
500 int_class = INT_CLASS_DBG;
502 int_class = INT_CLASS_CRIT;
509 case INT_CLASS_NONCRIT:
510 set_guest_srr(vcpu, vcpu->arch.regs.nip,
511 vcpu->arch.shared->msr);
514 set_guest_csrr(vcpu, vcpu->arch.regs.nip,
515 vcpu->arch.shared->msr);
518 set_guest_dsrr(vcpu, vcpu->arch.regs.nip,
519 vcpu->arch.shared->msr);
522 set_guest_mcsrr(vcpu, vcpu->arch.regs.nip,
523 vcpu->arch.shared->msr);
527 vcpu->arch.regs.nip = vcpu->arch.ivpr |
528 vcpu->arch.ivor[priority];
530 kvmppc_set_esr(vcpu, vcpu->arch.queued_esr);
532 kvmppc_set_dar(vcpu, vcpu->arch.queued_dear);
534 if (vcpu->arch.epr_flags & KVMPPC_EPR_USER)
535 kvm_make_request(KVM_REQ_EPR_EXIT, vcpu);
536 else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) {
537 BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC);
538 kvmppc_mpic_set_epr(vcpu);
543 #if defined(CONFIG_64BIT)
544 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
547 kvmppc_set_msr(vcpu, new_msr);
550 clear_bit(priority, &vcpu->arch.pending_exceptions);
553 #ifdef CONFIG_KVM_BOOKE_HV
555 * If an interrupt is pending but masked, raise a guest doorbell
556 * so that we are notified when the guest enables the relevant
559 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
560 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
561 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
562 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
563 if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
564 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
571 * Return the number of jiffies until the next timeout. If the timeout is
572 * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA
573 * because the larger value can break the timer APIs.
575 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu)
577 u64 tb, wdt_tb, wdt_ticks = 0;
579 u32 period = TCR_GET_WP(vcpu->arch.tcr);
581 wdt_tb = 1ULL << (63 - period);
584 * The watchdog timeout will hapeen when TB bit corresponding
585 * to watchdog will toggle from 0 to 1.
590 wdt_ticks += wdt_tb - (tb & (wdt_tb - 1));
592 /* Convert timebase ticks to jiffies */
593 nr_jiffies = wdt_ticks;
595 if (do_div(nr_jiffies, tb_ticks_per_jiffy))
598 return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA);
601 static void arm_next_watchdog(struct kvm_vcpu *vcpu)
603 unsigned long nr_jiffies;
607 * If TSR_ENW and TSR_WIS are not set then no need to exit to
608 * userspace, so clear the KVM_REQ_WATCHDOG request.
610 if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS))
611 kvm_clear_request(KVM_REQ_WATCHDOG, vcpu);
613 spin_lock_irqsave(&vcpu->arch.wdt_lock, flags);
614 nr_jiffies = watchdog_next_timeout(vcpu);
616 * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA
617 * then do not run the watchdog timer as this can break timer APIs.
619 if (nr_jiffies < NEXT_TIMER_MAX_DELTA)
620 mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies);
622 del_timer(&vcpu->arch.wdt_timer);
623 spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags);
626 void kvmppc_watchdog_func(struct timer_list *t)
628 struct kvm_vcpu *vcpu = from_timer(vcpu, t, arch.wdt_timer);
633 new_tsr = tsr = vcpu->arch.tsr;
641 new_tsr = tsr | TSR_WIS;
643 new_tsr = tsr | TSR_ENW;
645 } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr);
647 if (new_tsr & TSR_WIS) {
649 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
654 * If this is final watchdog expiry and some action is required
655 * then exit to userspace.
657 if (final && (vcpu->arch.tcr & TCR_WRC_MASK) &&
658 vcpu->arch.watchdog_enabled) {
660 kvm_make_request(KVM_REQ_WATCHDOG, vcpu);
665 * Stop running the watchdog timer after final expiration to
666 * prevent the host from being flooded with timers if the
667 * guest sets a short period.
668 * Timers will resume when TSR/TCR is updated next time.
671 arm_next_watchdog(vcpu);
674 static void update_timer_ints(struct kvm_vcpu *vcpu)
676 if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
677 kvmppc_core_queue_dec(vcpu);
679 kvmppc_core_dequeue_dec(vcpu);
681 if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS))
682 kvmppc_core_queue_watchdog(vcpu);
684 kvmppc_core_dequeue_watchdog(vcpu);
687 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
689 unsigned long *pending = &vcpu->arch.pending_exceptions;
690 unsigned int priority;
692 priority = __ffs(*pending);
693 while (priority < BOOKE_IRQPRIO_MAX) {
694 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
697 priority = find_next_bit(pending,
698 BITS_PER_BYTE * sizeof(*pending),
702 /* Tell the guest about our interrupt status */
703 vcpu->arch.shared->int_pending = !!*pending;
706 /* Check pending exceptions and deliver one, if possible. */
707 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
710 WARN_ON_ONCE(!irqs_disabled());
712 kvmppc_core_check_exceptions(vcpu);
714 if (kvm_request_pending(vcpu)) {
715 /* Exception delivery raised request; start over */
719 if (vcpu->arch.shared->msr & MSR_WE) {
721 kvm_vcpu_block(vcpu);
722 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
725 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
732 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
734 int r = 1; /* Indicate we want to get back into the guest */
736 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
737 update_timer_ints(vcpu);
738 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
739 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
740 kvmppc_core_flush_tlb(vcpu);
743 if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) {
744 vcpu->run->exit_reason = KVM_EXIT_WATCHDOG;
748 if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) {
749 vcpu->run->epr.epr = 0;
750 vcpu->arch.epr_needed = true;
751 vcpu->run->exit_reason = KVM_EXIT_EPR;
758 int kvmppc_vcpu_run(struct kvm_vcpu *vcpu)
761 struct debug_reg debug;
763 if (!vcpu->arch.sane) {
764 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
768 s = kvmppc_prepare_to_enter(vcpu);
773 /* interrupts now hard-disabled */
775 #ifdef CONFIG_PPC_FPU
776 /* Save userspace FPU state in stack */
780 * Since we can't trap on MSR_FP in GS-mode, we consider the guest
781 * as always using the FPU.
783 kvmppc_load_guest_fp(vcpu);
786 #ifdef CONFIG_ALTIVEC
787 /* Save userspace AltiVec state in stack */
788 if (cpu_has_feature(CPU_FTR_ALTIVEC))
789 enable_kernel_altivec();
791 * Since we can't trap on MSR_VEC in GS-mode, we consider the guest
792 * as always using the AltiVec.
794 kvmppc_load_guest_altivec(vcpu);
797 /* Switch to guest debug context */
798 debug = vcpu->arch.dbg_reg;
799 switch_booke_debug_regs(&debug);
800 debug = current->thread.debug;
801 current->thread.debug = vcpu->arch.dbg_reg;
803 vcpu->arch.pgdir = vcpu->kvm->mm->pgd;
804 kvmppc_fix_ee_before_entry();
806 ret = __kvmppc_vcpu_run(vcpu);
808 /* No need for guest_exit. It's done in handle_exit.
809 We also get here with interrupts enabled. */
811 /* Switch back to user space debug context */
812 switch_booke_debug_regs(&debug);
813 current->thread.debug = debug;
815 #ifdef CONFIG_PPC_FPU
816 kvmppc_save_guest_fp(vcpu);
819 #ifdef CONFIG_ALTIVEC
820 kvmppc_save_guest_altivec(vcpu);
824 vcpu->mode = OUTSIDE_GUEST_MODE;
828 static int emulation_exit(struct kvm_vcpu *vcpu)
830 enum emulation_result er;
832 er = kvmppc_emulate_instruction(vcpu);
835 /* don't overwrite subtypes, just account kvm_stats */
836 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
837 /* Future optimization: only reload non-volatiles if
838 * they were actually modified by emulation. */
839 return RESUME_GUEST_NV;
845 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
846 __func__, vcpu->arch.regs.nip, vcpu->arch.last_inst);
847 /* For debugging, encode the failing instruction and
848 * report it to userspace. */
849 vcpu->run->hw.hardware_exit_reason = ~0ULL << 32;
850 vcpu->run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
851 kvmppc_core_queue_program(vcpu, ESR_PIL);
854 case EMULATE_EXIT_USER:
862 static int kvmppc_handle_debug(struct kvm_vcpu *vcpu)
864 struct kvm_run *run = vcpu->run;
865 struct debug_reg *dbg_reg = &(vcpu->arch.dbg_reg);
866 u32 dbsr = vcpu->arch.dbsr;
868 if (vcpu->guest_debug == 0) {
870 * Debug resources belong to Guest.
871 * Imprecise debug event is not injected
873 if (dbsr & DBSR_IDE) {
879 if (dbsr && (vcpu->arch.shared->msr & MSR_DE) &&
880 (vcpu->arch.dbg_reg.dbcr0 & DBCR0_IDM))
881 kvmppc_core_queue_debug(vcpu);
883 /* Inject a program interrupt if trap debug is not allowed */
884 if ((dbsr & DBSR_TIE) && !(vcpu->arch.shared->msr & MSR_DE))
885 kvmppc_core_queue_program(vcpu, ESR_PTR);
891 * Debug resource owned by userspace.
892 * Clear guest dbsr (vcpu->arch.dbsr)
895 run->debug.arch.status = 0;
896 run->debug.arch.address = vcpu->arch.regs.nip;
898 if (dbsr & (DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4)) {
899 run->debug.arch.status |= KVMPPC_DEBUG_BREAKPOINT;
901 if (dbsr & (DBSR_DAC1W | DBSR_DAC2W))
902 run->debug.arch.status |= KVMPPC_DEBUG_WATCH_WRITE;
903 else if (dbsr & (DBSR_DAC1R | DBSR_DAC2R))
904 run->debug.arch.status |= KVMPPC_DEBUG_WATCH_READ;
905 if (dbsr & (DBSR_DAC1R | DBSR_DAC1W))
906 run->debug.arch.address = dbg_reg->dac1;
907 else if (dbsr & (DBSR_DAC2R | DBSR_DAC2W))
908 run->debug.arch.address = dbg_reg->dac2;
914 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
916 ulong r1, ip, msr, lr;
918 asm("mr %0, 1" : "=r"(r1));
919 asm("mflr %0" : "=r"(lr));
920 asm("mfmsr %0" : "=r"(msr));
921 asm("bl 1f; 1: mflr %0" : "=r"(ip));
923 memset(regs, 0, sizeof(*regs));
931 * For interrupts needed to be handled by host interrupt handlers,
932 * corresponding host handler are called from here in similar way
933 * (but not exact) as they are called from low level handler
934 * (such as from arch/powerpc/kernel/head_fsl_booke.S).
936 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
937 unsigned int exit_nr)
942 case BOOKE_INTERRUPT_EXTERNAL:
943 kvmppc_fill_pt_regs(®s);
946 case BOOKE_INTERRUPT_DECREMENTER:
947 kvmppc_fill_pt_regs(®s);
948 timer_interrupt(®s);
950 #if defined(CONFIG_PPC_DOORBELL)
951 case BOOKE_INTERRUPT_DOORBELL:
952 kvmppc_fill_pt_regs(®s);
953 doorbell_exception(®s);
956 case BOOKE_INTERRUPT_MACHINE_CHECK:
959 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
960 kvmppc_fill_pt_regs(®s);
961 performance_monitor_exception(®s);
963 case BOOKE_INTERRUPT_WATCHDOG:
964 kvmppc_fill_pt_regs(®s);
965 #ifdef CONFIG_BOOKE_WDT
966 WatchdogException(®s);
968 unknown_exception(®s);
971 case BOOKE_INTERRUPT_CRITICAL:
972 kvmppc_fill_pt_regs(®s);
973 unknown_exception(®s);
975 case BOOKE_INTERRUPT_DEBUG:
976 /* Save DBSR before preemption is enabled */
977 vcpu->arch.dbsr = mfspr(SPRN_DBSR);
983 static int kvmppc_resume_inst_load(struct kvm_vcpu *vcpu,
984 enum emulation_result emulated, u32 last_inst)
991 pr_debug("%s: load instruction from guest address %lx failed\n",
992 __func__, vcpu->arch.regs.nip);
993 /* For debugging, encode the failing instruction and
994 * report it to userspace. */
995 vcpu->run->hw.hardware_exit_reason = ~0ULL << 32;
996 vcpu->run->hw.hardware_exit_reason |= last_inst;
997 kvmppc_core_queue_program(vcpu, ESR_PIL);
1006 * kvmppc_handle_exit
1008 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
1010 int kvmppc_handle_exit(struct kvm_vcpu *vcpu, unsigned int exit_nr)
1012 struct kvm_run *run = vcpu->run;
1013 int r = RESUME_HOST;
1016 u32 last_inst = KVM_INST_FETCH_FAILED;
1017 enum emulation_result emulated = EMULATE_DONE;
1019 /* update before a new last_exit_type is rewritten */
1020 kvmppc_update_timing_stats(vcpu);
1022 /* restart interrupts if they were meant for the host */
1023 kvmppc_restart_interrupt(vcpu, exit_nr);
1026 * get last instruction before being preempted
1027 * TODO: for e6500 check also BOOKE_INTERRUPT_LRAT_ERROR & ESR_DATA
1030 case BOOKE_INTERRUPT_DATA_STORAGE:
1031 case BOOKE_INTERRUPT_DTLB_MISS:
1032 case BOOKE_INTERRUPT_HV_PRIV:
1033 emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1035 case BOOKE_INTERRUPT_PROGRAM:
1036 /* SW breakpoints arrive as illegal instructions on HV */
1037 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
1038 emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1044 trace_kvm_exit(exit_nr, vcpu);
1045 guest_exit_irqoff();
1049 run->exit_reason = KVM_EXIT_UNKNOWN;
1050 run->ready_for_interrupt_injection = 1;
1052 if (emulated != EMULATE_DONE) {
1053 r = kvmppc_resume_inst_load(vcpu, emulated, last_inst);
1058 case BOOKE_INTERRUPT_MACHINE_CHECK:
1059 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
1060 kvmppc_dump_vcpu(vcpu);
1061 /* For debugging, send invalid exit reason to user space */
1062 run->hw.hardware_exit_reason = ~1ULL << 32;
1063 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
1067 case BOOKE_INTERRUPT_EXTERNAL:
1068 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
1072 case BOOKE_INTERRUPT_DECREMENTER:
1073 kvmppc_account_exit(vcpu, DEC_EXITS);
1077 case BOOKE_INTERRUPT_WATCHDOG:
1081 case BOOKE_INTERRUPT_DOORBELL:
1082 kvmppc_account_exit(vcpu, DBELL_EXITS);
1086 case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
1087 kvmppc_account_exit(vcpu, GDBELL_EXITS);
1090 * We are here because there is a pending guest interrupt
1091 * which could not be delivered as MSR_CE or MSR_ME was not
1092 * set. Once we break from here we will retry delivery.
1097 case BOOKE_INTERRUPT_GUEST_DBELL:
1098 kvmppc_account_exit(vcpu, GDBELL_EXITS);
1101 * We are here because there is a pending guest interrupt
1102 * which could not be delivered as MSR_EE was not set. Once
1103 * we break from here we will retry delivery.
1108 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
1112 case BOOKE_INTERRUPT_HV_PRIV:
1113 r = emulation_exit(vcpu);
1116 case BOOKE_INTERRUPT_PROGRAM:
1117 if ((vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) &&
1118 (last_inst == KVMPPC_INST_SW_BREAKPOINT)) {
1120 * We are here because of an SW breakpoint instr,
1121 * so lets return to host to handle.
1123 r = kvmppc_handle_debug(vcpu);
1124 run->exit_reason = KVM_EXIT_DEBUG;
1125 kvmppc_account_exit(vcpu, DEBUG_EXITS);
1129 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
1131 * Program traps generated by user-level software must
1132 * be handled by the guest kernel.
1134 * In GS mode, hypervisor privileged instructions trap
1135 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
1136 * actual program interrupts, handled by the guest.
1138 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
1140 kvmppc_account_exit(vcpu, USR_PR_INST);
1144 r = emulation_exit(vcpu);
1147 case BOOKE_INTERRUPT_FP_UNAVAIL:
1148 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
1149 kvmppc_account_exit(vcpu, FP_UNAVAIL);
1154 case BOOKE_INTERRUPT_SPE_UNAVAIL: {
1155 if (vcpu->arch.shared->msr & MSR_SPE)
1156 kvmppc_vcpu_enable_spe(vcpu);
1158 kvmppc_booke_queue_irqprio(vcpu,
1159 BOOKE_IRQPRIO_SPE_UNAVAIL);
1164 case BOOKE_INTERRUPT_SPE_FP_DATA:
1165 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
1169 case BOOKE_INTERRUPT_SPE_FP_ROUND:
1170 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
1173 #elif defined(CONFIG_SPE_POSSIBLE)
1174 case BOOKE_INTERRUPT_SPE_UNAVAIL:
1176 * Guest wants SPE, but host kernel doesn't support it. Send
1177 * an "unimplemented operation" program check to the guest.
1179 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
1184 * These really should never happen without CONFIG_SPE,
1185 * as we should never enable the real MSR[SPE] in the guest.
1187 case BOOKE_INTERRUPT_SPE_FP_DATA:
1188 case BOOKE_INTERRUPT_SPE_FP_ROUND:
1189 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
1190 __func__, exit_nr, vcpu->arch.regs.nip);
1191 run->hw.hardware_exit_reason = exit_nr;
1194 #endif /* CONFIG_SPE_POSSIBLE */
1197 * On cores with Vector category, KVM is loaded only if CONFIG_ALTIVEC,
1198 * see kvmppc_core_check_processor_compat().
1200 #ifdef CONFIG_ALTIVEC
1201 case BOOKE_INTERRUPT_ALTIVEC_UNAVAIL:
1202 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL);
1206 case BOOKE_INTERRUPT_ALTIVEC_ASSIST:
1207 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_ASSIST);
1212 case BOOKE_INTERRUPT_DATA_STORAGE:
1213 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
1214 vcpu->arch.fault_esr);
1215 kvmppc_account_exit(vcpu, DSI_EXITS);
1219 case BOOKE_INTERRUPT_INST_STORAGE:
1220 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
1221 kvmppc_account_exit(vcpu, ISI_EXITS);
1225 case BOOKE_INTERRUPT_ALIGNMENT:
1226 kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear,
1227 vcpu->arch.fault_esr);
1231 #ifdef CONFIG_KVM_BOOKE_HV
1232 case BOOKE_INTERRUPT_HV_SYSCALL:
1233 if (!(vcpu->arch.shared->msr & MSR_PR)) {
1234 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1237 * hcall from guest userspace -- send privileged
1238 * instruction program check.
1240 kvmppc_core_queue_program(vcpu, ESR_PPR);
1246 case BOOKE_INTERRUPT_SYSCALL:
1247 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1248 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1249 /* KVM PV hypercalls */
1250 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1253 /* Guest syscalls */
1254 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
1256 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
1261 case BOOKE_INTERRUPT_DTLB_MISS: {
1262 unsigned long eaddr = vcpu->arch.fault_dear;
1267 #ifdef CONFIG_KVM_E500V2
1268 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1269 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1270 kvmppc_map_magic(vcpu);
1271 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1278 /* Check the guest TLB. */
1279 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1280 if (gtlb_index < 0) {
1281 /* The guest didn't have a mapping for it. */
1282 kvmppc_core_queue_dtlb_miss(vcpu,
1283 vcpu->arch.fault_dear,
1284 vcpu->arch.fault_esr);
1285 kvmppc_mmu_dtlb_miss(vcpu);
1286 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
1291 idx = srcu_read_lock(&vcpu->kvm->srcu);
1293 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1294 gfn = gpaddr >> PAGE_SHIFT;
1296 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1297 /* The guest TLB had a mapping, but the shadow TLB
1298 * didn't, and it is RAM. This could be because:
1299 * a) the entry is mapping the host kernel, or
1300 * b) the guest used a large mapping which we're faking
1301 * Either way, we need to satisfy the fault without
1302 * invoking the guest. */
1303 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1304 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1307 /* Guest has mapped and accessed a page which is not
1309 vcpu->arch.paddr_accessed = gpaddr;
1310 vcpu->arch.vaddr_accessed = eaddr;
1311 r = kvmppc_emulate_mmio(vcpu);
1312 kvmppc_account_exit(vcpu, MMIO_EXITS);
1315 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1319 case BOOKE_INTERRUPT_ITLB_MISS: {
1320 unsigned long eaddr = vcpu->arch.regs.nip;
1327 /* Check the guest TLB. */
1328 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1329 if (gtlb_index < 0) {
1330 /* The guest didn't have a mapping for it. */
1331 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
1332 kvmppc_mmu_itlb_miss(vcpu);
1333 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
1337 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
1339 idx = srcu_read_lock(&vcpu->kvm->srcu);
1341 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1342 gfn = gpaddr >> PAGE_SHIFT;
1344 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1345 /* The guest TLB had a mapping, but the shadow TLB
1346 * didn't. This could be because:
1347 * a) the entry is mapping the host kernel, or
1348 * b) the guest used a large mapping which we're faking
1349 * Either way, we need to satisfy the fault without
1350 * invoking the guest. */
1351 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1353 /* Guest mapped and leaped at non-RAM! */
1354 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
1357 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1361 case BOOKE_INTERRUPT_DEBUG: {
1362 r = kvmppc_handle_debug(vcpu);
1363 if (r == RESUME_HOST)
1364 run->exit_reason = KVM_EXIT_DEBUG;
1365 kvmppc_account_exit(vcpu, DEBUG_EXITS);
1370 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
1376 * To avoid clobbering exit_reason, only check for signals if we
1377 * aren't already exiting to userspace for some other reason.
1379 if (!(r & RESUME_HOST)) {
1380 s = kvmppc_prepare_to_enter(vcpu);
1382 r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
1384 /* interrupts now hard-disabled */
1385 kvmppc_fix_ee_before_entry();
1386 kvmppc_load_guest_fp(vcpu);
1387 kvmppc_load_guest_altivec(vcpu);
1394 static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr)
1396 u32 old_tsr = vcpu->arch.tsr;
1398 vcpu->arch.tsr = new_tsr;
1400 if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS))
1401 arm_next_watchdog(vcpu);
1403 update_timer_ints(vcpu);
1406 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
1408 /* setup watchdog timer once */
1409 spin_lock_init(&vcpu->arch.wdt_lock);
1410 timer_setup(&vcpu->arch.wdt_timer, kvmppc_watchdog_func, 0);
1413 * Clear DBSR.MRR to avoid guest debug interrupt as
1414 * this is of host interest
1416 mtspr(SPRN_DBSR, DBSR_MRR);
1420 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
1422 del_timer_sync(&vcpu->arch.wdt_timer);
1425 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1431 regs->pc = vcpu->arch.regs.nip;
1432 regs->cr = kvmppc_get_cr(vcpu);
1433 regs->ctr = vcpu->arch.regs.ctr;
1434 regs->lr = vcpu->arch.regs.link;
1435 regs->xer = kvmppc_get_xer(vcpu);
1436 regs->msr = vcpu->arch.shared->msr;
1437 regs->srr0 = kvmppc_get_srr0(vcpu);
1438 regs->srr1 = kvmppc_get_srr1(vcpu);
1439 regs->pid = vcpu->arch.pid;
1440 regs->sprg0 = kvmppc_get_sprg0(vcpu);
1441 regs->sprg1 = kvmppc_get_sprg1(vcpu);
1442 regs->sprg2 = kvmppc_get_sprg2(vcpu);
1443 regs->sprg3 = kvmppc_get_sprg3(vcpu);
1444 regs->sprg4 = kvmppc_get_sprg4(vcpu);
1445 regs->sprg5 = kvmppc_get_sprg5(vcpu);
1446 regs->sprg6 = kvmppc_get_sprg6(vcpu);
1447 regs->sprg7 = kvmppc_get_sprg7(vcpu);
1449 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1450 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1456 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1462 vcpu->arch.regs.nip = regs->pc;
1463 kvmppc_set_cr(vcpu, regs->cr);
1464 vcpu->arch.regs.ctr = regs->ctr;
1465 vcpu->arch.regs.link = regs->lr;
1466 kvmppc_set_xer(vcpu, regs->xer);
1467 kvmppc_set_msr(vcpu, regs->msr);
1468 kvmppc_set_srr0(vcpu, regs->srr0);
1469 kvmppc_set_srr1(vcpu, regs->srr1);
1470 kvmppc_set_pid(vcpu, regs->pid);
1471 kvmppc_set_sprg0(vcpu, regs->sprg0);
1472 kvmppc_set_sprg1(vcpu, regs->sprg1);
1473 kvmppc_set_sprg2(vcpu, regs->sprg2);
1474 kvmppc_set_sprg3(vcpu, regs->sprg3);
1475 kvmppc_set_sprg4(vcpu, regs->sprg4);
1476 kvmppc_set_sprg5(vcpu, regs->sprg5);
1477 kvmppc_set_sprg6(vcpu, regs->sprg6);
1478 kvmppc_set_sprg7(vcpu, regs->sprg7);
1480 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1481 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1487 static void get_sregs_base(struct kvm_vcpu *vcpu,
1488 struct kvm_sregs *sregs)
1492 sregs->u.e.features |= KVM_SREGS_E_BASE;
1494 sregs->u.e.csrr0 = vcpu->arch.csrr0;
1495 sregs->u.e.csrr1 = vcpu->arch.csrr1;
1496 sregs->u.e.mcsr = vcpu->arch.mcsr;
1497 sregs->u.e.esr = kvmppc_get_esr(vcpu);
1498 sregs->u.e.dear = kvmppc_get_dar(vcpu);
1499 sregs->u.e.tsr = vcpu->arch.tsr;
1500 sregs->u.e.tcr = vcpu->arch.tcr;
1501 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1503 sregs->u.e.vrsave = vcpu->arch.vrsave;
1506 static int set_sregs_base(struct kvm_vcpu *vcpu,
1507 struct kvm_sregs *sregs)
1509 if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1512 vcpu->arch.csrr0 = sregs->u.e.csrr0;
1513 vcpu->arch.csrr1 = sregs->u.e.csrr1;
1514 vcpu->arch.mcsr = sregs->u.e.mcsr;
1515 kvmppc_set_esr(vcpu, sregs->u.e.esr);
1516 kvmppc_set_dar(vcpu, sregs->u.e.dear);
1517 vcpu->arch.vrsave = sregs->u.e.vrsave;
1518 kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1520 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1521 vcpu->arch.dec = sregs->u.e.dec;
1522 kvmppc_emulate_dec(vcpu);
1525 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR)
1526 kvmppc_set_tsr(vcpu, sregs->u.e.tsr);
1531 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1532 struct kvm_sregs *sregs)
1534 sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1536 sregs->u.e.pir = vcpu->vcpu_id;
1537 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1538 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1539 sregs->u.e.decar = vcpu->arch.decar;
1540 sregs->u.e.ivpr = vcpu->arch.ivpr;
1543 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1544 struct kvm_sregs *sregs)
1546 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1549 if (sregs->u.e.pir != vcpu->vcpu_id)
1552 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1553 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1554 vcpu->arch.decar = sregs->u.e.decar;
1555 vcpu->arch.ivpr = sregs->u.e.ivpr;
1560 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1562 sregs->u.e.features |= KVM_SREGS_E_IVOR;
1564 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1565 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1566 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1567 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1568 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1569 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1570 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1571 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1572 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1573 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1574 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1575 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1576 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1577 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1578 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1579 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1583 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1585 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1588 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1589 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1590 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1591 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1592 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1593 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1594 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1595 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1596 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1597 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1598 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1599 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1600 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1601 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1602 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1603 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1608 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1609 struct kvm_sregs *sregs)
1615 sregs->pvr = vcpu->arch.pvr;
1617 get_sregs_base(vcpu, sregs);
1618 get_sregs_arch206(vcpu, sregs);
1619 ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
1625 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1626 struct kvm_sregs *sregs)
1631 if (vcpu->arch.pvr != sregs->pvr)
1634 ret = set_sregs_base(vcpu, sregs);
1638 ret = set_sregs_arch206(vcpu, sregs);
1642 ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
1649 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
1650 union kvmppc_one_reg *val)
1655 case KVM_REG_PPC_IAC1:
1656 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac1);
1658 case KVM_REG_PPC_IAC2:
1659 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac2);
1661 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1662 case KVM_REG_PPC_IAC3:
1663 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac3);
1665 case KVM_REG_PPC_IAC4:
1666 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac4);
1669 case KVM_REG_PPC_DAC1:
1670 *val = get_reg_val(id, vcpu->arch.dbg_reg.dac1);
1672 case KVM_REG_PPC_DAC2:
1673 *val = get_reg_val(id, vcpu->arch.dbg_reg.dac2);
1675 case KVM_REG_PPC_EPR: {
1676 u32 epr = kvmppc_get_epr(vcpu);
1677 *val = get_reg_val(id, epr);
1680 #if defined(CONFIG_64BIT)
1681 case KVM_REG_PPC_EPCR:
1682 *val = get_reg_val(id, vcpu->arch.epcr);
1685 case KVM_REG_PPC_TCR:
1686 *val = get_reg_val(id, vcpu->arch.tcr);
1688 case KVM_REG_PPC_TSR:
1689 *val = get_reg_val(id, vcpu->arch.tsr);
1691 case KVM_REG_PPC_DEBUG_INST:
1692 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1694 case KVM_REG_PPC_VRSAVE:
1695 *val = get_reg_val(id, vcpu->arch.vrsave);
1698 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
1705 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
1706 union kvmppc_one_reg *val)
1711 case KVM_REG_PPC_IAC1:
1712 vcpu->arch.dbg_reg.iac1 = set_reg_val(id, *val);
1714 case KVM_REG_PPC_IAC2:
1715 vcpu->arch.dbg_reg.iac2 = set_reg_val(id, *val);
1717 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1718 case KVM_REG_PPC_IAC3:
1719 vcpu->arch.dbg_reg.iac3 = set_reg_val(id, *val);
1721 case KVM_REG_PPC_IAC4:
1722 vcpu->arch.dbg_reg.iac4 = set_reg_val(id, *val);
1725 case KVM_REG_PPC_DAC1:
1726 vcpu->arch.dbg_reg.dac1 = set_reg_val(id, *val);
1728 case KVM_REG_PPC_DAC2:
1729 vcpu->arch.dbg_reg.dac2 = set_reg_val(id, *val);
1731 case KVM_REG_PPC_EPR: {
1732 u32 new_epr = set_reg_val(id, *val);
1733 kvmppc_set_epr(vcpu, new_epr);
1736 #if defined(CONFIG_64BIT)
1737 case KVM_REG_PPC_EPCR: {
1738 u32 new_epcr = set_reg_val(id, *val);
1739 kvmppc_set_epcr(vcpu, new_epcr);
1743 case KVM_REG_PPC_OR_TSR: {
1744 u32 tsr_bits = set_reg_val(id, *val);
1745 kvmppc_set_tsr_bits(vcpu, tsr_bits);
1748 case KVM_REG_PPC_CLEAR_TSR: {
1749 u32 tsr_bits = set_reg_val(id, *val);
1750 kvmppc_clr_tsr_bits(vcpu, tsr_bits);
1753 case KVM_REG_PPC_TSR: {
1754 u32 tsr = set_reg_val(id, *val);
1755 kvmppc_set_tsr(vcpu, tsr);
1758 case KVM_REG_PPC_TCR: {
1759 u32 tcr = set_reg_val(id, *val);
1760 kvmppc_set_tcr(vcpu, tcr);
1763 case KVM_REG_PPC_VRSAVE:
1764 vcpu->arch.vrsave = set_reg_val(id, *val);
1767 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
1774 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1779 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1784 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1785 struct kvm_translation *tr)
1790 r = kvmppc_core_vcpu_translate(vcpu, tr);
1795 void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
1800 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1805 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
1809 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1810 struct kvm_memory_slot *memslot,
1811 const struct kvm_userspace_memory_region *mem,
1812 enum kvm_mr_change change)
1817 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1818 const struct kvm_userspace_memory_region *mem,
1819 const struct kvm_memory_slot *old,
1820 const struct kvm_memory_slot *new,
1821 enum kvm_mr_change change)
1825 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
1829 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr)
1831 #if defined(CONFIG_64BIT)
1832 vcpu->arch.epcr = new_epcr;
1833 #ifdef CONFIG_KVM_BOOKE_HV
1834 vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM;
1835 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
1836 vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM;
1841 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1843 vcpu->arch.tcr = new_tcr;
1844 arm_next_watchdog(vcpu);
1845 update_timer_ints(vcpu);
1848 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1850 set_bits(tsr_bits, &vcpu->arch.tsr);
1852 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1853 kvm_vcpu_kick(vcpu);
1856 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1858 clear_bits(tsr_bits, &vcpu->arch.tsr);
1861 * We may have stopped the watchdog due to
1862 * being stuck on final expiration.
1864 if (tsr_bits & (TSR_ENW | TSR_WIS))
1865 arm_next_watchdog(vcpu);
1867 update_timer_ints(vcpu);
1870 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
1872 if (vcpu->arch.tcr & TCR_ARE) {
1873 vcpu->arch.dec = vcpu->arch.decar;
1874 kvmppc_emulate_dec(vcpu);
1877 kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1880 static int kvmppc_booke_add_breakpoint(struct debug_reg *dbg_reg,
1881 uint64_t addr, int index)
1885 dbg_reg->dbcr0 |= DBCR0_IAC1;
1886 dbg_reg->iac1 = addr;
1889 dbg_reg->dbcr0 |= DBCR0_IAC2;
1890 dbg_reg->iac2 = addr;
1892 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1894 dbg_reg->dbcr0 |= DBCR0_IAC3;
1895 dbg_reg->iac3 = addr;
1898 dbg_reg->dbcr0 |= DBCR0_IAC4;
1899 dbg_reg->iac4 = addr;
1906 dbg_reg->dbcr0 |= DBCR0_IDM;
1910 static int kvmppc_booke_add_watchpoint(struct debug_reg *dbg_reg, uint64_t addr,
1911 int type, int index)
1915 if (type & KVMPPC_DEBUG_WATCH_READ)
1916 dbg_reg->dbcr0 |= DBCR0_DAC1R;
1917 if (type & KVMPPC_DEBUG_WATCH_WRITE)
1918 dbg_reg->dbcr0 |= DBCR0_DAC1W;
1919 dbg_reg->dac1 = addr;
1922 if (type & KVMPPC_DEBUG_WATCH_READ)
1923 dbg_reg->dbcr0 |= DBCR0_DAC2R;
1924 if (type & KVMPPC_DEBUG_WATCH_WRITE)
1925 dbg_reg->dbcr0 |= DBCR0_DAC2W;
1926 dbg_reg->dac2 = addr;
1932 dbg_reg->dbcr0 |= DBCR0_IDM;
1935 void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set)
1937 /* XXX: Add similar MSR protection for BookE-PR */
1938 #ifdef CONFIG_KVM_BOOKE_HV
1939 BUG_ON(prot_bitmap & ~(MSRP_UCLEP | MSRP_DEP | MSRP_PMMP));
1941 if (prot_bitmap & MSR_UCLE)
1942 vcpu->arch.shadow_msrp |= MSRP_UCLEP;
1943 if (prot_bitmap & MSR_DE)
1944 vcpu->arch.shadow_msrp |= MSRP_DEP;
1945 if (prot_bitmap & MSR_PMM)
1946 vcpu->arch.shadow_msrp |= MSRP_PMMP;
1948 if (prot_bitmap & MSR_UCLE)
1949 vcpu->arch.shadow_msrp &= ~MSRP_UCLEP;
1950 if (prot_bitmap & MSR_DE)
1951 vcpu->arch.shadow_msrp &= ~MSRP_DEP;
1952 if (prot_bitmap & MSR_PMM)
1953 vcpu->arch.shadow_msrp &= ~MSRP_PMMP;
1958 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
1959 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
1964 #ifdef CONFIG_KVM_E500V2
1965 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1966 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1968 pte->raddr = (vcpu->arch.magic_page_pa & PAGE_MASK) |
1969 (eaddr & ~PAGE_MASK);
1970 pte->vpage = eaddr >> PAGE_SHIFT;
1971 pte->may_read = true;
1972 pte->may_write = true;
1973 pte->may_execute = true;
1979 /* Check the guest TLB. */
1982 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1985 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1991 /* Do we have a TLB entry at all? */
1995 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1998 pte->raddr = (gpaddr & PAGE_MASK) | (eaddr & ~PAGE_MASK);
1999 pte->vpage = eaddr >> PAGE_SHIFT;
2001 /* XXX read permissions from the guest TLB */
2002 pte->may_read = true;
2003 pte->may_write = true;
2004 pte->may_execute = true;
2009 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
2010 struct kvm_guest_debug *dbg)
2012 struct debug_reg *dbg_reg;
2013 int n, b = 0, w = 0;
2018 if (!(dbg->control & KVM_GUESTDBG_ENABLE)) {
2019 vcpu->arch.dbg_reg.dbcr0 = 0;
2020 vcpu->guest_debug = 0;
2021 kvm_guest_protect_msr(vcpu, MSR_DE, false);
2025 kvm_guest_protect_msr(vcpu, MSR_DE, true);
2026 vcpu->guest_debug = dbg->control;
2027 vcpu->arch.dbg_reg.dbcr0 = 0;
2029 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
2030 vcpu->arch.dbg_reg.dbcr0 |= DBCR0_IDM | DBCR0_IC;
2032 /* Code below handles only HW breakpoints */
2033 dbg_reg = &(vcpu->arch.dbg_reg);
2035 #ifdef CONFIG_KVM_BOOKE_HV
2037 * On BookE-HV (e500mc) the guest is always executed with MSR.GS=1
2038 * DBCR1 and DBCR2 are set to trigger debug events when MSR.PR is 0
2044 * On BookE-PR (e500v2) the guest is always executed with MSR.PR=1
2045 * We set DBCR1 and DBCR2 to only trigger debug events when MSR.PR
2048 dbg_reg->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US | DBCR1_IAC3US |
2050 dbg_reg->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US;
2053 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
2057 for (n = 0; n < (KVMPPC_BOOKE_IAC_NUM + KVMPPC_BOOKE_DAC_NUM); n++) {
2058 uint64_t addr = dbg->arch.bp[n].addr;
2059 uint32_t type = dbg->arch.bp[n].type;
2061 if (type == KVMPPC_DEBUG_NONE)
2064 if (type & ~(KVMPPC_DEBUG_WATCH_READ |
2065 KVMPPC_DEBUG_WATCH_WRITE |
2066 KVMPPC_DEBUG_BREAKPOINT))
2069 if (type & KVMPPC_DEBUG_BREAKPOINT) {
2070 /* Setting H/W breakpoint */
2071 if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++))
2074 /* Setting H/W watchpoint */
2075 if (kvmppc_booke_add_watchpoint(dbg_reg, addr,
2087 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2089 vcpu->cpu = smp_processor_id();
2090 current->thread.kvm_vcpu = vcpu;
2093 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
2095 current->thread.kvm_vcpu = NULL;
2098 /* Clear pending debug event in DBSR */
2099 kvmppc_clear_dbsr();
2102 int kvmppc_core_init_vm(struct kvm *kvm)
2104 return kvm->arch.kvm_ops->init_vm(kvm);
2107 int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu)
2112 r = vcpu->kvm->arch.kvm_ops->vcpu_create(vcpu);
2116 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
2117 vcpu->arch.regs.nip = 0;
2118 vcpu->arch.shared->pir = vcpu->vcpu_id;
2119 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
2120 kvmppc_set_msr(vcpu, 0);
2122 #ifndef CONFIG_KVM_BOOKE_HV
2123 vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS;
2124 vcpu->arch.shadow_pid = 1;
2125 vcpu->arch.shared->msr = 0;
2128 /* Eye-catching numbers so we know if the guest takes an interrupt
2129 * before it's programmed its own IVPR/IVORs. */
2130 vcpu->arch.ivpr = 0x55550000;
2131 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
2132 vcpu->arch.ivor[i] = 0x7700 | i * 4;
2134 kvmppc_init_timing_stats(vcpu);
2136 r = kvmppc_core_vcpu_setup(vcpu);
2138 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
2139 kvmppc_sanity_check(vcpu);
2143 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
2145 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
2148 void kvmppc_core_destroy_vm(struct kvm *kvm)
2150 kvm->arch.kvm_ops->destroy_vm(kvm);
2153 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2155 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
2158 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
2160 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
2163 int __init kvmppc_booke_init(void)
2165 #ifndef CONFIG_KVM_BOOKE_HV
2166 unsigned long ivor[16];
2167 unsigned long *handler = kvmppc_booke_handler_addr;
2168 unsigned long max_ivor = 0;
2169 unsigned long handler_len;
2172 /* We install our own exception handlers by hijacking IVPR. IVPR must
2173 * be 16-bit aligned, so we need a 64KB allocation. */
2174 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
2176 if (!kvmppc_booke_handlers)
2179 /* XXX make sure our handlers are smaller than Linux's */
2181 /* Copy our interrupt handlers to match host IVORs. That way we don't
2182 * have to swap the IVORs on every guest/host transition. */
2183 ivor[0] = mfspr(SPRN_IVOR0);
2184 ivor[1] = mfspr(SPRN_IVOR1);
2185 ivor[2] = mfspr(SPRN_IVOR2);
2186 ivor[3] = mfspr(SPRN_IVOR3);
2187 ivor[4] = mfspr(SPRN_IVOR4);
2188 ivor[5] = mfspr(SPRN_IVOR5);
2189 ivor[6] = mfspr(SPRN_IVOR6);
2190 ivor[7] = mfspr(SPRN_IVOR7);
2191 ivor[8] = mfspr(SPRN_IVOR8);
2192 ivor[9] = mfspr(SPRN_IVOR9);
2193 ivor[10] = mfspr(SPRN_IVOR10);
2194 ivor[11] = mfspr(SPRN_IVOR11);
2195 ivor[12] = mfspr(SPRN_IVOR12);
2196 ivor[13] = mfspr(SPRN_IVOR13);
2197 ivor[14] = mfspr(SPRN_IVOR14);
2198 ivor[15] = mfspr(SPRN_IVOR15);
2200 for (i = 0; i < 16; i++) {
2201 if (ivor[i] > max_ivor)
2204 handler_len = handler[i + 1] - handler[i];
2205 memcpy((void *)kvmppc_booke_handlers + ivor[i],
2206 (void *)handler[i], handler_len);
2209 handler_len = handler[max_ivor + 1] - handler[max_ivor];
2210 flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers +
2211 ivor[max_ivor] + handler_len);
2212 #endif /* !BOOKE_HV */
2216 void __exit kvmppc_booke_exit(void)
2218 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);