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.
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.
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.
15 * Copyright IBM Corp. 2007
16 * Copyright 2010-2011 Freescale Semiconductor, Inc.
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>
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>
32 #include <asm/cputable.h>
33 #include <linux/uaccess.h>
34 #include <asm/kvm_ppc.h>
35 #include <asm/cacheflush.h>
36 #include <asm/dbell.h>
37 #include <asm/hw_irq.h>
44 #define CREATE_TRACE_POINTS
45 #include "trace_booke.h"
47 unsigned long kvmppc_booke_handlers;
49 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
50 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
52 struct kvm_stats_debugfs_item debugfs_entries[] = {
53 { "mmio", VCPU_STAT(mmio_exits) },
54 { "sig", VCPU_STAT(signal_exits) },
55 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
56 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
57 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) },
58 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) },
59 { "sysc", VCPU_STAT(syscall_exits) },
60 { "isi", VCPU_STAT(isi_exits) },
61 { "dsi", VCPU_STAT(dsi_exits) },
62 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
63 { "dec", VCPU_STAT(dec_exits) },
64 { "ext_intr", VCPU_STAT(ext_intr_exits) },
65 { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
66 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
67 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
68 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
69 { "doorbell", VCPU_STAT(dbell_exits) },
70 { "guest doorbell", VCPU_STAT(gdbell_exits) },
71 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
75 /* TODO: use vcpu_printf() */
76 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
80 printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
81 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
82 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
83 vcpu->arch.shared->srr1);
85 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
87 for (i = 0; i < 32; i += 4) {
88 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
89 kvmppc_get_gpr(vcpu, i),
90 kvmppc_get_gpr(vcpu, i+1),
91 kvmppc_get_gpr(vcpu, i+2),
92 kvmppc_get_gpr(vcpu, i+3));
97 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
101 kvmppc_save_guest_spe(vcpu);
102 disable_kernel_spe();
103 vcpu->arch.shadow_msr &= ~MSR_SPE;
107 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
111 kvmppc_load_guest_spe(vcpu);
112 disable_kernel_spe();
113 vcpu->arch.shadow_msr |= MSR_SPE;
117 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
119 if (vcpu->arch.shared->msr & MSR_SPE) {
120 if (!(vcpu->arch.shadow_msr & MSR_SPE))
121 kvmppc_vcpu_enable_spe(vcpu);
122 } else if (vcpu->arch.shadow_msr & MSR_SPE) {
123 kvmppc_vcpu_disable_spe(vcpu);
127 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
133 * Load up guest vcpu FP state if it's needed.
134 * It also set the MSR_FP in thread so that host know
135 * we're holding FPU, and then host can help to save
136 * guest vcpu FP state if other threads require to use FPU.
137 * This simulates an FP unavailable fault.
139 * It requires to be called with preemption disabled.
141 static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
143 #ifdef CONFIG_PPC_FPU
144 if (!(current->thread.regs->msr & MSR_FP)) {
146 load_fp_state(&vcpu->arch.fp);
148 current->thread.fp_save_area = &vcpu->arch.fp;
149 current->thread.regs->msr |= MSR_FP;
155 * Save guest vcpu FP state into thread.
156 * It requires to be called with preemption disabled.
158 static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
160 #ifdef CONFIG_PPC_FPU
161 if (current->thread.regs->msr & MSR_FP)
163 current->thread.fp_save_area = NULL;
167 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
169 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV)
170 /* We always treat the FP bit as enabled from the host
171 perspective, so only need to adjust the shadow MSR */
172 vcpu->arch.shadow_msr &= ~MSR_FP;
173 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP;
178 * Simulate AltiVec unavailable fault to load guest state
179 * from thread to AltiVec unit.
180 * It requires to be called with preemption disabled.
182 static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu)
184 #ifdef CONFIG_ALTIVEC
185 if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
186 if (!(current->thread.regs->msr & MSR_VEC)) {
187 enable_kernel_altivec();
188 load_vr_state(&vcpu->arch.vr);
189 disable_kernel_altivec();
190 current->thread.vr_save_area = &vcpu->arch.vr;
191 current->thread.regs->msr |= MSR_VEC;
198 * Save guest vcpu AltiVec state into thread.
199 * It requires to be called with preemption disabled.
201 static inline void kvmppc_save_guest_altivec(struct kvm_vcpu *vcpu)
203 #ifdef CONFIG_ALTIVEC
204 if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
205 if (current->thread.regs->msr & MSR_VEC)
206 giveup_altivec(current);
207 current->thread.vr_save_area = NULL;
212 static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu)
214 /* Synchronize guest's desire to get debug interrupts into shadow MSR */
215 #ifndef CONFIG_KVM_BOOKE_HV
216 vcpu->arch.shadow_msr &= ~MSR_DE;
217 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_DE;
220 /* Force enable debug interrupts when user space wants to debug */
221 if (vcpu->guest_debug) {
222 #ifdef CONFIG_KVM_BOOKE_HV
224 * Since there is no shadow MSR, sync MSR_DE into the guest
227 vcpu->arch.shared->msr |= MSR_DE;
229 vcpu->arch.shadow_msr |= MSR_DE;
230 vcpu->arch.shared->msr &= ~MSR_DE;
236 * Helper function for "full" MSR writes. No need to call this if only
237 * EE/CE/ME/DE/RI are changing.
239 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
241 u32 old_msr = vcpu->arch.shared->msr;
243 #ifdef CONFIG_KVM_BOOKE_HV
247 vcpu->arch.shared->msr = new_msr;
249 kvmppc_mmu_msr_notify(vcpu, old_msr);
250 kvmppc_vcpu_sync_spe(vcpu);
251 kvmppc_vcpu_sync_fpu(vcpu);
252 kvmppc_vcpu_sync_debug(vcpu);
255 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
256 unsigned int priority)
258 trace_kvm_booke_queue_irqprio(vcpu, priority);
259 set_bit(priority, &vcpu->arch.pending_exceptions);
262 void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
263 ulong dear_flags, ulong esr_flags)
265 vcpu->arch.queued_dear = dear_flags;
266 vcpu->arch.queued_esr = esr_flags;
267 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
270 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
271 ulong dear_flags, ulong esr_flags)
273 vcpu->arch.queued_dear = dear_flags;
274 vcpu->arch.queued_esr = esr_flags;
275 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
278 void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu)
280 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
283 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong esr_flags)
285 vcpu->arch.queued_esr = esr_flags;
286 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
289 static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags,
292 vcpu->arch.queued_dear = dear_flags;
293 vcpu->arch.queued_esr = esr_flags;
294 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT);
297 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
299 vcpu->arch.queued_esr = esr_flags;
300 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
303 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
305 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
308 #ifdef CONFIG_ALTIVEC
309 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
311 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL);
315 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
317 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
320 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
322 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
325 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
327 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
330 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
331 struct kvm_interrupt *irq)
333 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
335 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
336 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
338 kvmppc_booke_queue_irqprio(vcpu, prio);
341 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
343 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
344 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
347 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu)
349 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG);
352 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu)
354 clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions);
357 void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu)
359 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG);
362 void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu)
364 clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions);
367 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
369 kvmppc_set_srr0(vcpu, srr0);
370 kvmppc_set_srr1(vcpu, srr1);
373 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
375 vcpu->arch.csrr0 = srr0;
376 vcpu->arch.csrr1 = srr1;
379 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
381 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
382 vcpu->arch.dsrr0 = srr0;
383 vcpu->arch.dsrr1 = srr1;
385 set_guest_csrr(vcpu, srr0, srr1);
389 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
391 vcpu->arch.mcsrr0 = srr0;
392 vcpu->arch.mcsrr1 = srr1;
395 /* Deliver the interrupt of the corresponding priority, if possible. */
396 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
397 unsigned int priority)
401 bool update_esr = false, update_dear = false, update_epr = false;
402 ulong crit_raw = vcpu->arch.shared->critical;
403 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
405 bool keep_irq = false;
406 enum int_class int_class;
407 ulong new_msr = vcpu->arch.shared->msr;
409 /* Truncate crit indicators in 32 bit mode */
410 if (!(vcpu->arch.shared->msr & MSR_SF)) {
411 crit_raw &= 0xffffffff;
412 crit_r1 &= 0xffffffff;
415 /* Critical section when crit == r1 */
416 crit = (crit_raw == crit_r1);
417 /* ... and we're in supervisor mode */
418 crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
420 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
421 priority = BOOKE_IRQPRIO_EXTERNAL;
425 if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags)
429 case BOOKE_IRQPRIO_DTLB_MISS:
430 case BOOKE_IRQPRIO_DATA_STORAGE:
431 case BOOKE_IRQPRIO_ALIGNMENT:
434 case BOOKE_IRQPRIO_INST_STORAGE:
435 case BOOKE_IRQPRIO_PROGRAM:
438 case BOOKE_IRQPRIO_ITLB_MISS:
439 case BOOKE_IRQPRIO_SYSCALL:
440 case BOOKE_IRQPRIO_FP_UNAVAIL:
441 #ifdef CONFIG_SPE_POSSIBLE
442 case BOOKE_IRQPRIO_SPE_UNAVAIL:
443 case BOOKE_IRQPRIO_SPE_FP_DATA:
444 case BOOKE_IRQPRIO_SPE_FP_ROUND:
446 #ifdef CONFIG_ALTIVEC
447 case BOOKE_IRQPRIO_ALTIVEC_UNAVAIL:
448 case BOOKE_IRQPRIO_ALTIVEC_ASSIST:
450 case BOOKE_IRQPRIO_AP_UNAVAIL:
452 msr_mask = MSR_CE | MSR_ME | MSR_DE;
453 int_class = INT_CLASS_NONCRIT;
455 case BOOKE_IRQPRIO_WATCHDOG:
456 case BOOKE_IRQPRIO_CRITICAL:
457 case BOOKE_IRQPRIO_DBELL_CRIT:
458 allowed = vcpu->arch.shared->msr & MSR_CE;
459 allowed = allowed && !crit;
461 int_class = INT_CLASS_CRIT;
463 case BOOKE_IRQPRIO_MACHINE_CHECK:
464 allowed = vcpu->arch.shared->msr & MSR_ME;
465 allowed = allowed && !crit;
466 int_class = INT_CLASS_MC;
468 case BOOKE_IRQPRIO_DECREMENTER:
469 case BOOKE_IRQPRIO_FIT:
472 case BOOKE_IRQPRIO_EXTERNAL:
473 case BOOKE_IRQPRIO_DBELL:
474 allowed = vcpu->arch.shared->msr & MSR_EE;
475 allowed = allowed && !crit;
476 msr_mask = MSR_CE | MSR_ME | MSR_DE;
477 int_class = INT_CLASS_NONCRIT;
479 case BOOKE_IRQPRIO_DEBUG:
480 allowed = vcpu->arch.shared->msr & MSR_DE;
481 allowed = allowed && !crit;
483 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC))
484 int_class = INT_CLASS_DBG;
486 int_class = INT_CLASS_CRIT;
493 case INT_CLASS_NONCRIT:
494 set_guest_srr(vcpu, vcpu->arch.pc,
495 vcpu->arch.shared->msr);
498 set_guest_csrr(vcpu, vcpu->arch.pc,
499 vcpu->arch.shared->msr);
502 set_guest_dsrr(vcpu, vcpu->arch.pc,
503 vcpu->arch.shared->msr);
506 set_guest_mcsrr(vcpu, vcpu->arch.pc,
507 vcpu->arch.shared->msr);
511 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
512 if (update_esr == true)
513 kvmppc_set_esr(vcpu, vcpu->arch.queued_esr);
514 if (update_dear == true)
515 kvmppc_set_dar(vcpu, vcpu->arch.queued_dear);
516 if (update_epr == true) {
517 if (vcpu->arch.epr_flags & KVMPPC_EPR_USER)
518 kvm_make_request(KVM_REQ_EPR_EXIT, vcpu);
519 else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) {
520 BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC);
521 kvmppc_mpic_set_epr(vcpu);
526 #if defined(CONFIG_64BIT)
527 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
530 kvmppc_set_msr(vcpu, new_msr);
533 clear_bit(priority, &vcpu->arch.pending_exceptions);
536 #ifdef CONFIG_KVM_BOOKE_HV
538 * If an interrupt is pending but masked, raise a guest doorbell
539 * so that we are notified when the guest enables the relevant
542 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
543 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
544 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
545 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
546 if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
547 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
554 * Return the number of jiffies until the next timeout. If the timeout is
555 * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA
556 * because the larger value can break the timer APIs.
558 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu)
560 u64 tb, wdt_tb, wdt_ticks = 0;
562 u32 period = TCR_GET_WP(vcpu->arch.tcr);
564 wdt_tb = 1ULL << (63 - period);
567 * The watchdog timeout will hapeen when TB bit corresponding
568 * to watchdog will toggle from 0 to 1.
573 wdt_ticks += wdt_tb - (tb & (wdt_tb - 1));
575 /* Convert timebase ticks to jiffies */
576 nr_jiffies = wdt_ticks;
578 if (do_div(nr_jiffies, tb_ticks_per_jiffy))
581 return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA);
584 static void arm_next_watchdog(struct kvm_vcpu *vcpu)
586 unsigned long nr_jiffies;
590 * If TSR_ENW and TSR_WIS are not set then no need to exit to
591 * userspace, so clear the KVM_REQ_WATCHDOG request.
593 if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS))
594 kvm_clear_request(KVM_REQ_WATCHDOG, vcpu);
596 spin_lock_irqsave(&vcpu->arch.wdt_lock, flags);
597 nr_jiffies = watchdog_next_timeout(vcpu);
599 * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA
600 * then do not run the watchdog timer as this can break timer APIs.
602 if (nr_jiffies < NEXT_TIMER_MAX_DELTA)
603 mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies);
605 del_timer(&vcpu->arch.wdt_timer);
606 spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags);
609 void kvmppc_watchdog_func(struct timer_list *t)
611 struct kvm_vcpu *vcpu = from_timer(vcpu, t, arch.wdt_timer);
616 new_tsr = tsr = vcpu->arch.tsr;
624 new_tsr = tsr | TSR_WIS;
626 new_tsr = tsr | TSR_ENW;
628 } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr);
630 if (new_tsr & TSR_WIS) {
632 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
637 * If this is final watchdog expiry and some action is required
638 * then exit to userspace.
640 if (final && (vcpu->arch.tcr & TCR_WRC_MASK) &&
641 vcpu->arch.watchdog_enabled) {
643 kvm_make_request(KVM_REQ_WATCHDOG, vcpu);
648 * Stop running the watchdog timer after final expiration to
649 * prevent the host from being flooded with timers if the
650 * guest sets a short period.
651 * Timers will resume when TSR/TCR is updated next time.
654 arm_next_watchdog(vcpu);
657 static void update_timer_ints(struct kvm_vcpu *vcpu)
659 if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
660 kvmppc_core_queue_dec(vcpu);
662 kvmppc_core_dequeue_dec(vcpu);
664 if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS))
665 kvmppc_core_queue_watchdog(vcpu);
667 kvmppc_core_dequeue_watchdog(vcpu);
670 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
672 unsigned long *pending = &vcpu->arch.pending_exceptions;
673 unsigned int priority;
675 priority = __ffs(*pending);
676 while (priority < BOOKE_IRQPRIO_MAX) {
677 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
680 priority = find_next_bit(pending,
681 BITS_PER_BYTE * sizeof(*pending),
685 /* Tell the guest about our interrupt status */
686 vcpu->arch.shared->int_pending = !!*pending;
689 /* Check pending exceptions and deliver one, if possible. */
690 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
693 WARN_ON_ONCE(!irqs_disabled());
695 kvmppc_core_check_exceptions(vcpu);
697 if (kvm_request_pending(vcpu)) {
698 /* Exception delivery raised request; start over */
702 if (vcpu->arch.shared->msr & MSR_WE) {
704 kvm_vcpu_block(vcpu);
705 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
708 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
715 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
717 int r = 1; /* Indicate we want to get back into the guest */
719 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
720 update_timer_ints(vcpu);
721 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
722 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
723 kvmppc_core_flush_tlb(vcpu);
726 if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) {
727 vcpu->run->exit_reason = KVM_EXIT_WATCHDOG;
731 if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) {
732 vcpu->run->epr.epr = 0;
733 vcpu->arch.epr_needed = true;
734 vcpu->run->exit_reason = KVM_EXIT_EPR;
741 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
744 struct debug_reg debug;
746 if (!vcpu->arch.sane) {
747 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
751 s = kvmppc_prepare_to_enter(vcpu);
756 /* interrupts now hard-disabled */
758 #ifdef CONFIG_PPC_FPU
759 /* Save userspace FPU state in stack */
763 * Since we can't trap on MSR_FP in GS-mode, we consider the guest
764 * as always using the FPU.
766 kvmppc_load_guest_fp(vcpu);
769 #ifdef CONFIG_ALTIVEC
770 /* Save userspace AltiVec state in stack */
771 if (cpu_has_feature(CPU_FTR_ALTIVEC))
772 enable_kernel_altivec();
774 * Since we can't trap on MSR_VEC in GS-mode, we consider the guest
775 * as always using the AltiVec.
777 kvmppc_load_guest_altivec(vcpu);
780 /* Switch to guest debug context */
781 debug = vcpu->arch.dbg_reg;
782 switch_booke_debug_regs(&debug);
783 debug = current->thread.debug;
784 current->thread.debug = vcpu->arch.dbg_reg;
786 vcpu->arch.pgdir = current->mm->pgd;
787 kvmppc_fix_ee_before_entry();
789 ret = __kvmppc_vcpu_run(kvm_run, vcpu);
791 /* No need for guest_exit. It's done in handle_exit.
792 We also get here with interrupts enabled. */
794 /* Switch back to user space debug context */
795 switch_booke_debug_regs(&debug);
796 current->thread.debug = debug;
798 #ifdef CONFIG_PPC_FPU
799 kvmppc_save_guest_fp(vcpu);
802 #ifdef CONFIG_ALTIVEC
803 kvmppc_save_guest_altivec(vcpu);
807 vcpu->mode = OUTSIDE_GUEST_MODE;
811 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
813 enum emulation_result er;
815 er = kvmppc_emulate_instruction(run, vcpu);
818 /* don't overwrite subtypes, just account kvm_stats */
819 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
820 /* Future optimization: only reload non-volatiles if
821 * they were actually modified by emulation. */
822 return RESUME_GUEST_NV;
828 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
829 __func__, vcpu->arch.pc, vcpu->arch.last_inst);
830 /* For debugging, encode the failing instruction and
831 * report it to userspace. */
832 run->hw.hardware_exit_reason = ~0ULL << 32;
833 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
834 kvmppc_core_queue_program(vcpu, ESR_PIL);
837 case EMULATE_EXIT_USER:
845 static int kvmppc_handle_debug(struct kvm_run *run, struct kvm_vcpu *vcpu)
847 struct debug_reg *dbg_reg = &(vcpu->arch.dbg_reg);
848 u32 dbsr = vcpu->arch.dbsr;
850 if (vcpu->guest_debug == 0) {
852 * Debug resources belong to Guest.
853 * Imprecise debug event is not injected
855 if (dbsr & DBSR_IDE) {
861 if (dbsr && (vcpu->arch.shared->msr & MSR_DE) &&
862 (vcpu->arch.dbg_reg.dbcr0 & DBCR0_IDM))
863 kvmppc_core_queue_debug(vcpu);
865 /* Inject a program interrupt if trap debug is not allowed */
866 if ((dbsr & DBSR_TIE) && !(vcpu->arch.shared->msr & MSR_DE))
867 kvmppc_core_queue_program(vcpu, ESR_PTR);
873 * Debug resource owned by userspace.
874 * Clear guest dbsr (vcpu->arch.dbsr)
877 run->debug.arch.status = 0;
878 run->debug.arch.address = vcpu->arch.pc;
880 if (dbsr & (DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4)) {
881 run->debug.arch.status |= KVMPPC_DEBUG_BREAKPOINT;
883 if (dbsr & (DBSR_DAC1W | DBSR_DAC2W))
884 run->debug.arch.status |= KVMPPC_DEBUG_WATCH_WRITE;
885 else if (dbsr & (DBSR_DAC1R | DBSR_DAC2R))
886 run->debug.arch.status |= KVMPPC_DEBUG_WATCH_READ;
887 if (dbsr & (DBSR_DAC1R | DBSR_DAC1W))
888 run->debug.arch.address = dbg_reg->dac1;
889 else if (dbsr & (DBSR_DAC2R | DBSR_DAC2W))
890 run->debug.arch.address = dbg_reg->dac2;
896 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
898 ulong r1, ip, msr, lr;
900 asm("mr %0, 1" : "=r"(r1));
901 asm("mflr %0" : "=r"(lr));
902 asm("mfmsr %0" : "=r"(msr));
903 asm("bl 1f; 1: mflr %0" : "=r"(ip));
905 memset(regs, 0, sizeof(*regs));
913 * For interrupts needed to be handled by host interrupt handlers,
914 * corresponding host handler are called from here in similar way
915 * (but not exact) as they are called from low level handler
916 * (such as from arch/powerpc/kernel/head_fsl_booke.S).
918 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
919 unsigned int exit_nr)
924 case BOOKE_INTERRUPT_EXTERNAL:
925 kvmppc_fill_pt_regs(®s);
928 case BOOKE_INTERRUPT_DECREMENTER:
929 kvmppc_fill_pt_regs(®s);
930 timer_interrupt(®s);
932 #if defined(CONFIG_PPC_DOORBELL)
933 case BOOKE_INTERRUPT_DOORBELL:
934 kvmppc_fill_pt_regs(®s);
935 doorbell_exception(®s);
938 case BOOKE_INTERRUPT_MACHINE_CHECK:
941 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
942 kvmppc_fill_pt_regs(®s);
943 performance_monitor_exception(®s);
945 case BOOKE_INTERRUPT_WATCHDOG:
946 kvmppc_fill_pt_regs(®s);
947 #ifdef CONFIG_BOOKE_WDT
948 WatchdogException(®s);
950 unknown_exception(®s);
953 case BOOKE_INTERRUPT_CRITICAL:
954 kvmppc_fill_pt_regs(®s);
955 unknown_exception(®s);
957 case BOOKE_INTERRUPT_DEBUG:
958 /* Save DBSR before preemption is enabled */
959 vcpu->arch.dbsr = mfspr(SPRN_DBSR);
965 static int kvmppc_resume_inst_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
966 enum emulation_result emulated, u32 last_inst)
973 pr_debug("%s: load instruction from guest address %lx failed\n",
974 __func__, vcpu->arch.pc);
975 /* For debugging, encode the failing instruction and
976 * report it to userspace. */
977 run->hw.hardware_exit_reason = ~0ULL << 32;
978 run->hw.hardware_exit_reason |= last_inst;
979 kvmppc_core_queue_program(vcpu, ESR_PIL);
990 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
992 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
993 unsigned int exit_nr)
998 u32 last_inst = KVM_INST_FETCH_FAILED;
999 enum emulation_result emulated = EMULATE_DONE;
1001 /* update before a new last_exit_type is rewritten */
1002 kvmppc_update_timing_stats(vcpu);
1004 /* restart interrupts if they were meant for the host */
1005 kvmppc_restart_interrupt(vcpu, exit_nr);
1008 * get last instruction before being preempted
1009 * TODO: for e6500 check also BOOKE_INTERRUPT_LRAT_ERROR & ESR_DATA
1012 case BOOKE_INTERRUPT_DATA_STORAGE:
1013 case BOOKE_INTERRUPT_DTLB_MISS:
1014 case BOOKE_INTERRUPT_HV_PRIV:
1015 emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1017 case BOOKE_INTERRUPT_PROGRAM:
1018 /* SW breakpoints arrive as illegal instructions on HV */
1019 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
1020 emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1026 trace_kvm_exit(exit_nr, vcpu);
1027 guest_exit_irqoff();
1031 run->exit_reason = KVM_EXIT_UNKNOWN;
1032 run->ready_for_interrupt_injection = 1;
1034 if (emulated != EMULATE_DONE) {
1035 r = kvmppc_resume_inst_load(run, vcpu, emulated, last_inst);
1040 case BOOKE_INTERRUPT_MACHINE_CHECK:
1041 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
1042 kvmppc_dump_vcpu(vcpu);
1043 /* For debugging, send invalid exit reason to user space */
1044 run->hw.hardware_exit_reason = ~1ULL << 32;
1045 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
1049 case BOOKE_INTERRUPT_EXTERNAL:
1050 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
1054 case BOOKE_INTERRUPT_DECREMENTER:
1055 kvmppc_account_exit(vcpu, DEC_EXITS);
1059 case BOOKE_INTERRUPT_WATCHDOG:
1063 case BOOKE_INTERRUPT_DOORBELL:
1064 kvmppc_account_exit(vcpu, DBELL_EXITS);
1068 case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
1069 kvmppc_account_exit(vcpu, GDBELL_EXITS);
1072 * We are here because there is a pending guest interrupt
1073 * which could not be delivered as MSR_CE or MSR_ME was not
1074 * set. Once we break from here we will retry delivery.
1079 case BOOKE_INTERRUPT_GUEST_DBELL:
1080 kvmppc_account_exit(vcpu, GDBELL_EXITS);
1083 * We are here because there is a pending guest interrupt
1084 * which could not be delivered as MSR_EE was not set. Once
1085 * we break from here we will retry delivery.
1090 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
1094 case BOOKE_INTERRUPT_HV_PRIV:
1095 r = emulation_exit(run, vcpu);
1098 case BOOKE_INTERRUPT_PROGRAM:
1099 if ((vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) &&
1100 (last_inst == KVMPPC_INST_SW_BREAKPOINT)) {
1102 * We are here because of an SW breakpoint instr,
1103 * so lets return to host to handle.
1105 r = kvmppc_handle_debug(run, vcpu);
1106 run->exit_reason = KVM_EXIT_DEBUG;
1107 kvmppc_account_exit(vcpu, DEBUG_EXITS);
1111 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
1113 * Program traps generated by user-level software must
1114 * be handled by the guest kernel.
1116 * In GS mode, hypervisor privileged instructions trap
1117 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
1118 * actual program interrupts, handled by the guest.
1120 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
1122 kvmppc_account_exit(vcpu, USR_PR_INST);
1126 r = emulation_exit(run, vcpu);
1129 case BOOKE_INTERRUPT_FP_UNAVAIL:
1130 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
1131 kvmppc_account_exit(vcpu, FP_UNAVAIL);
1136 case BOOKE_INTERRUPT_SPE_UNAVAIL: {
1137 if (vcpu->arch.shared->msr & MSR_SPE)
1138 kvmppc_vcpu_enable_spe(vcpu);
1140 kvmppc_booke_queue_irqprio(vcpu,
1141 BOOKE_IRQPRIO_SPE_UNAVAIL);
1146 case BOOKE_INTERRUPT_SPE_FP_DATA:
1147 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
1151 case BOOKE_INTERRUPT_SPE_FP_ROUND:
1152 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
1155 #elif defined(CONFIG_SPE_POSSIBLE)
1156 case BOOKE_INTERRUPT_SPE_UNAVAIL:
1158 * Guest wants SPE, but host kernel doesn't support it. Send
1159 * an "unimplemented operation" program check to the guest.
1161 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
1166 * These really should never happen without CONFIG_SPE,
1167 * as we should never enable the real MSR[SPE] in the guest.
1169 case BOOKE_INTERRUPT_SPE_FP_DATA:
1170 case BOOKE_INTERRUPT_SPE_FP_ROUND:
1171 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
1172 __func__, exit_nr, vcpu->arch.pc);
1173 run->hw.hardware_exit_reason = exit_nr;
1176 #endif /* CONFIG_SPE_POSSIBLE */
1179 * On cores with Vector category, KVM is loaded only if CONFIG_ALTIVEC,
1180 * see kvmppc_core_check_processor_compat().
1182 #ifdef CONFIG_ALTIVEC
1183 case BOOKE_INTERRUPT_ALTIVEC_UNAVAIL:
1184 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL);
1188 case BOOKE_INTERRUPT_ALTIVEC_ASSIST:
1189 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_ASSIST);
1194 case BOOKE_INTERRUPT_DATA_STORAGE:
1195 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
1196 vcpu->arch.fault_esr);
1197 kvmppc_account_exit(vcpu, DSI_EXITS);
1201 case BOOKE_INTERRUPT_INST_STORAGE:
1202 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
1203 kvmppc_account_exit(vcpu, ISI_EXITS);
1207 case BOOKE_INTERRUPT_ALIGNMENT:
1208 kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear,
1209 vcpu->arch.fault_esr);
1213 #ifdef CONFIG_KVM_BOOKE_HV
1214 case BOOKE_INTERRUPT_HV_SYSCALL:
1215 if (!(vcpu->arch.shared->msr & MSR_PR)) {
1216 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1219 * hcall from guest userspace -- send privileged
1220 * instruction program check.
1222 kvmppc_core_queue_program(vcpu, ESR_PPR);
1228 case BOOKE_INTERRUPT_SYSCALL:
1229 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1230 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1231 /* KVM PV hypercalls */
1232 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1235 /* Guest syscalls */
1236 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
1238 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
1243 case BOOKE_INTERRUPT_DTLB_MISS: {
1244 unsigned long eaddr = vcpu->arch.fault_dear;
1249 #ifdef CONFIG_KVM_E500V2
1250 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1251 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1252 kvmppc_map_magic(vcpu);
1253 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1260 /* Check the guest TLB. */
1261 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1262 if (gtlb_index < 0) {
1263 /* The guest didn't have a mapping for it. */
1264 kvmppc_core_queue_dtlb_miss(vcpu,
1265 vcpu->arch.fault_dear,
1266 vcpu->arch.fault_esr);
1267 kvmppc_mmu_dtlb_miss(vcpu);
1268 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
1273 idx = srcu_read_lock(&vcpu->kvm->srcu);
1275 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1276 gfn = gpaddr >> PAGE_SHIFT;
1278 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1279 /* The guest TLB had a mapping, but the shadow TLB
1280 * didn't, and it is RAM. This could be because:
1281 * a) the entry is mapping the host kernel, or
1282 * b) the guest used a large mapping which we're faking
1283 * Either way, we need to satisfy the fault without
1284 * invoking the guest. */
1285 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1286 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1289 /* Guest has mapped and accessed a page which is not
1291 vcpu->arch.paddr_accessed = gpaddr;
1292 vcpu->arch.vaddr_accessed = eaddr;
1293 r = kvmppc_emulate_mmio(run, vcpu);
1294 kvmppc_account_exit(vcpu, MMIO_EXITS);
1297 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1301 case BOOKE_INTERRUPT_ITLB_MISS: {
1302 unsigned long eaddr = vcpu->arch.pc;
1309 /* Check the guest TLB. */
1310 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1311 if (gtlb_index < 0) {
1312 /* The guest didn't have a mapping for it. */
1313 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
1314 kvmppc_mmu_itlb_miss(vcpu);
1315 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
1319 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
1321 idx = srcu_read_lock(&vcpu->kvm->srcu);
1323 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1324 gfn = gpaddr >> PAGE_SHIFT;
1326 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1327 /* The guest TLB had a mapping, but the shadow TLB
1328 * didn't. This could be because:
1329 * a) the entry is mapping the host kernel, or
1330 * b) the guest used a large mapping which we're faking
1331 * Either way, we need to satisfy the fault without
1332 * invoking the guest. */
1333 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1335 /* Guest mapped and leaped at non-RAM! */
1336 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
1339 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1343 case BOOKE_INTERRUPT_DEBUG: {
1344 r = kvmppc_handle_debug(run, vcpu);
1345 if (r == RESUME_HOST)
1346 run->exit_reason = KVM_EXIT_DEBUG;
1347 kvmppc_account_exit(vcpu, DEBUG_EXITS);
1352 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
1358 * To avoid clobbering exit_reason, only check for signals if we
1359 * aren't already exiting to userspace for some other reason.
1361 if (!(r & RESUME_HOST)) {
1362 s = kvmppc_prepare_to_enter(vcpu);
1364 r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
1366 /* interrupts now hard-disabled */
1367 kvmppc_fix_ee_before_entry();
1368 kvmppc_load_guest_fp(vcpu);
1369 kvmppc_load_guest_altivec(vcpu);
1376 static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr)
1378 u32 old_tsr = vcpu->arch.tsr;
1380 vcpu->arch.tsr = new_tsr;
1382 if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS))
1383 arm_next_watchdog(vcpu);
1385 update_timer_ints(vcpu);
1388 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
1389 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1395 vcpu->arch.shared->pir = vcpu->vcpu_id;
1396 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
1397 kvmppc_set_msr(vcpu, 0);
1399 #ifndef CONFIG_KVM_BOOKE_HV
1400 vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS;
1401 vcpu->arch.shadow_pid = 1;
1402 vcpu->arch.shared->msr = 0;
1405 /* Eye-catching numbers so we know if the guest takes an interrupt
1406 * before it's programmed its own IVPR/IVORs. */
1407 vcpu->arch.ivpr = 0x55550000;
1408 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
1409 vcpu->arch.ivor[i] = 0x7700 | i * 4;
1411 kvmppc_init_timing_stats(vcpu);
1413 r = kvmppc_core_vcpu_setup(vcpu);
1414 kvmppc_sanity_check(vcpu);
1418 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
1420 /* setup watchdog timer once */
1421 spin_lock_init(&vcpu->arch.wdt_lock);
1422 timer_setup(&vcpu->arch.wdt_timer, kvmppc_watchdog_func, 0);
1425 * Clear DBSR.MRR to avoid guest debug interrupt as
1426 * this is of host interest
1428 mtspr(SPRN_DBSR, DBSR_MRR);
1432 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
1434 del_timer_sync(&vcpu->arch.wdt_timer);
1437 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1443 regs->pc = vcpu->arch.pc;
1444 regs->cr = kvmppc_get_cr(vcpu);
1445 regs->ctr = vcpu->arch.ctr;
1446 regs->lr = vcpu->arch.lr;
1447 regs->xer = kvmppc_get_xer(vcpu);
1448 regs->msr = vcpu->arch.shared->msr;
1449 regs->srr0 = kvmppc_get_srr0(vcpu);
1450 regs->srr1 = kvmppc_get_srr1(vcpu);
1451 regs->pid = vcpu->arch.pid;
1452 regs->sprg0 = kvmppc_get_sprg0(vcpu);
1453 regs->sprg1 = kvmppc_get_sprg1(vcpu);
1454 regs->sprg2 = kvmppc_get_sprg2(vcpu);
1455 regs->sprg3 = kvmppc_get_sprg3(vcpu);
1456 regs->sprg4 = kvmppc_get_sprg4(vcpu);
1457 regs->sprg5 = kvmppc_get_sprg5(vcpu);
1458 regs->sprg6 = kvmppc_get_sprg6(vcpu);
1459 regs->sprg7 = kvmppc_get_sprg7(vcpu);
1461 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1462 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1468 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1474 vcpu->arch.pc = regs->pc;
1475 kvmppc_set_cr(vcpu, regs->cr);
1476 vcpu->arch.ctr = regs->ctr;
1477 vcpu->arch.lr = regs->lr;
1478 kvmppc_set_xer(vcpu, regs->xer);
1479 kvmppc_set_msr(vcpu, regs->msr);
1480 kvmppc_set_srr0(vcpu, regs->srr0);
1481 kvmppc_set_srr1(vcpu, regs->srr1);
1482 kvmppc_set_pid(vcpu, regs->pid);
1483 kvmppc_set_sprg0(vcpu, regs->sprg0);
1484 kvmppc_set_sprg1(vcpu, regs->sprg1);
1485 kvmppc_set_sprg2(vcpu, regs->sprg2);
1486 kvmppc_set_sprg3(vcpu, regs->sprg3);
1487 kvmppc_set_sprg4(vcpu, regs->sprg4);
1488 kvmppc_set_sprg5(vcpu, regs->sprg5);
1489 kvmppc_set_sprg6(vcpu, regs->sprg6);
1490 kvmppc_set_sprg7(vcpu, regs->sprg7);
1492 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1493 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1499 static void get_sregs_base(struct kvm_vcpu *vcpu,
1500 struct kvm_sregs *sregs)
1504 sregs->u.e.features |= KVM_SREGS_E_BASE;
1506 sregs->u.e.csrr0 = vcpu->arch.csrr0;
1507 sregs->u.e.csrr1 = vcpu->arch.csrr1;
1508 sregs->u.e.mcsr = vcpu->arch.mcsr;
1509 sregs->u.e.esr = kvmppc_get_esr(vcpu);
1510 sregs->u.e.dear = kvmppc_get_dar(vcpu);
1511 sregs->u.e.tsr = vcpu->arch.tsr;
1512 sregs->u.e.tcr = vcpu->arch.tcr;
1513 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1515 sregs->u.e.vrsave = vcpu->arch.vrsave;
1518 static int set_sregs_base(struct kvm_vcpu *vcpu,
1519 struct kvm_sregs *sregs)
1521 if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1524 vcpu->arch.csrr0 = sregs->u.e.csrr0;
1525 vcpu->arch.csrr1 = sregs->u.e.csrr1;
1526 vcpu->arch.mcsr = sregs->u.e.mcsr;
1527 kvmppc_set_esr(vcpu, sregs->u.e.esr);
1528 kvmppc_set_dar(vcpu, sregs->u.e.dear);
1529 vcpu->arch.vrsave = sregs->u.e.vrsave;
1530 kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1532 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1533 vcpu->arch.dec = sregs->u.e.dec;
1534 kvmppc_emulate_dec(vcpu);
1537 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR)
1538 kvmppc_set_tsr(vcpu, sregs->u.e.tsr);
1543 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1544 struct kvm_sregs *sregs)
1546 sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1548 sregs->u.e.pir = vcpu->vcpu_id;
1549 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1550 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1551 sregs->u.e.decar = vcpu->arch.decar;
1552 sregs->u.e.ivpr = vcpu->arch.ivpr;
1555 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1556 struct kvm_sregs *sregs)
1558 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1561 if (sregs->u.e.pir != vcpu->vcpu_id)
1564 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1565 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1566 vcpu->arch.decar = sregs->u.e.decar;
1567 vcpu->arch.ivpr = sregs->u.e.ivpr;
1572 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1574 sregs->u.e.features |= KVM_SREGS_E_IVOR;
1576 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1577 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1578 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1579 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1580 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1581 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1582 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1583 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1584 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1585 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1586 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1587 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1588 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1589 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1590 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1591 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1595 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1597 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1600 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1601 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1602 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1603 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1604 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1605 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1606 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1607 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1608 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1609 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1610 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1611 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1612 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1613 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1614 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1615 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1620 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1621 struct kvm_sregs *sregs)
1627 sregs->pvr = vcpu->arch.pvr;
1629 get_sregs_base(vcpu, sregs);
1630 get_sregs_arch206(vcpu, sregs);
1631 ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
1637 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1638 struct kvm_sregs *sregs)
1643 if (vcpu->arch.pvr != sregs->pvr)
1646 ret = set_sregs_base(vcpu, sregs);
1650 ret = set_sregs_arch206(vcpu, sregs);
1654 ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
1661 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
1662 union kvmppc_one_reg *val)
1667 case KVM_REG_PPC_IAC1:
1668 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac1);
1670 case KVM_REG_PPC_IAC2:
1671 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac2);
1673 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1674 case KVM_REG_PPC_IAC3:
1675 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac3);
1677 case KVM_REG_PPC_IAC4:
1678 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac4);
1681 case KVM_REG_PPC_DAC1:
1682 *val = get_reg_val(id, vcpu->arch.dbg_reg.dac1);
1684 case KVM_REG_PPC_DAC2:
1685 *val = get_reg_val(id, vcpu->arch.dbg_reg.dac2);
1687 case KVM_REG_PPC_EPR: {
1688 u32 epr = kvmppc_get_epr(vcpu);
1689 *val = get_reg_val(id, epr);
1692 #if defined(CONFIG_64BIT)
1693 case KVM_REG_PPC_EPCR:
1694 *val = get_reg_val(id, vcpu->arch.epcr);
1697 case KVM_REG_PPC_TCR:
1698 *val = get_reg_val(id, vcpu->arch.tcr);
1700 case KVM_REG_PPC_TSR:
1701 *val = get_reg_val(id, vcpu->arch.tsr);
1703 case KVM_REG_PPC_DEBUG_INST:
1704 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1706 case KVM_REG_PPC_VRSAVE:
1707 *val = get_reg_val(id, vcpu->arch.vrsave);
1710 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
1717 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
1718 union kvmppc_one_reg *val)
1723 case KVM_REG_PPC_IAC1:
1724 vcpu->arch.dbg_reg.iac1 = set_reg_val(id, *val);
1726 case KVM_REG_PPC_IAC2:
1727 vcpu->arch.dbg_reg.iac2 = set_reg_val(id, *val);
1729 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1730 case KVM_REG_PPC_IAC3:
1731 vcpu->arch.dbg_reg.iac3 = set_reg_val(id, *val);
1733 case KVM_REG_PPC_IAC4:
1734 vcpu->arch.dbg_reg.iac4 = set_reg_val(id, *val);
1737 case KVM_REG_PPC_DAC1:
1738 vcpu->arch.dbg_reg.dac1 = set_reg_val(id, *val);
1740 case KVM_REG_PPC_DAC2:
1741 vcpu->arch.dbg_reg.dac2 = set_reg_val(id, *val);
1743 case KVM_REG_PPC_EPR: {
1744 u32 new_epr = set_reg_val(id, *val);
1745 kvmppc_set_epr(vcpu, new_epr);
1748 #if defined(CONFIG_64BIT)
1749 case KVM_REG_PPC_EPCR: {
1750 u32 new_epcr = set_reg_val(id, *val);
1751 kvmppc_set_epcr(vcpu, new_epcr);
1755 case KVM_REG_PPC_OR_TSR: {
1756 u32 tsr_bits = set_reg_val(id, *val);
1757 kvmppc_set_tsr_bits(vcpu, tsr_bits);
1760 case KVM_REG_PPC_CLEAR_TSR: {
1761 u32 tsr_bits = set_reg_val(id, *val);
1762 kvmppc_clr_tsr_bits(vcpu, tsr_bits);
1765 case KVM_REG_PPC_TSR: {
1766 u32 tsr = set_reg_val(id, *val);
1767 kvmppc_set_tsr(vcpu, tsr);
1770 case KVM_REG_PPC_TCR: {
1771 u32 tcr = set_reg_val(id, *val);
1772 kvmppc_set_tcr(vcpu, tcr);
1775 case KVM_REG_PPC_VRSAVE:
1776 vcpu->arch.vrsave = set_reg_val(id, *val);
1779 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
1786 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1791 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1796 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1797 struct kvm_translation *tr)
1802 r = kvmppc_core_vcpu_translate(vcpu, tr);
1807 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1812 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
1813 struct kvm_memory_slot *dont)
1817 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
1818 unsigned long npages)
1823 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1824 struct kvm_memory_slot *memslot,
1825 const struct kvm_userspace_memory_region *mem)
1830 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1831 const struct kvm_userspace_memory_region *mem,
1832 const struct kvm_memory_slot *old,
1833 const struct kvm_memory_slot *new)
1837 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
1841 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr)
1843 #if defined(CONFIG_64BIT)
1844 vcpu->arch.epcr = new_epcr;
1845 #ifdef CONFIG_KVM_BOOKE_HV
1846 vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM;
1847 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
1848 vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM;
1853 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1855 vcpu->arch.tcr = new_tcr;
1856 arm_next_watchdog(vcpu);
1857 update_timer_ints(vcpu);
1860 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1862 set_bits(tsr_bits, &vcpu->arch.tsr);
1864 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1865 kvm_vcpu_kick(vcpu);
1868 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1870 clear_bits(tsr_bits, &vcpu->arch.tsr);
1873 * We may have stopped the watchdog due to
1874 * being stuck on final expiration.
1876 if (tsr_bits & (TSR_ENW | TSR_WIS))
1877 arm_next_watchdog(vcpu);
1879 update_timer_ints(vcpu);
1882 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
1884 if (vcpu->arch.tcr & TCR_ARE) {
1885 vcpu->arch.dec = vcpu->arch.decar;
1886 kvmppc_emulate_dec(vcpu);
1889 kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1892 static int kvmppc_booke_add_breakpoint(struct debug_reg *dbg_reg,
1893 uint64_t addr, int index)
1897 dbg_reg->dbcr0 |= DBCR0_IAC1;
1898 dbg_reg->iac1 = addr;
1901 dbg_reg->dbcr0 |= DBCR0_IAC2;
1902 dbg_reg->iac2 = addr;
1904 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1906 dbg_reg->dbcr0 |= DBCR0_IAC3;
1907 dbg_reg->iac3 = addr;
1910 dbg_reg->dbcr0 |= DBCR0_IAC4;
1911 dbg_reg->iac4 = addr;
1918 dbg_reg->dbcr0 |= DBCR0_IDM;
1922 static int kvmppc_booke_add_watchpoint(struct debug_reg *dbg_reg, uint64_t addr,
1923 int type, int index)
1927 if (type & KVMPPC_DEBUG_WATCH_READ)
1928 dbg_reg->dbcr0 |= DBCR0_DAC1R;
1929 if (type & KVMPPC_DEBUG_WATCH_WRITE)
1930 dbg_reg->dbcr0 |= DBCR0_DAC1W;
1931 dbg_reg->dac1 = addr;
1934 if (type & KVMPPC_DEBUG_WATCH_READ)
1935 dbg_reg->dbcr0 |= DBCR0_DAC2R;
1936 if (type & KVMPPC_DEBUG_WATCH_WRITE)
1937 dbg_reg->dbcr0 |= DBCR0_DAC2W;
1938 dbg_reg->dac2 = addr;
1944 dbg_reg->dbcr0 |= DBCR0_IDM;
1947 void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set)
1949 /* XXX: Add similar MSR protection for BookE-PR */
1950 #ifdef CONFIG_KVM_BOOKE_HV
1951 BUG_ON(prot_bitmap & ~(MSRP_UCLEP | MSRP_DEP | MSRP_PMMP));
1953 if (prot_bitmap & MSR_UCLE)
1954 vcpu->arch.shadow_msrp |= MSRP_UCLEP;
1955 if (prot_bitmap & MSR_DE)
1956 vcpu->arch.shadow_msrp |= MSRP_DEP;
1957 if (prot_bitmap & MSR_PMM)
1958 vcpu->arch.shadow_msrp |= MSRP_PMMP;
1960 if (prot_bitmap & MSR_UCLE)
1961 vcpu->arch.shadow_msrp &= ~MSRP_UCLEP;
1962 if (prot_bitmap & MSR_DE)
1963 vcpu->arch.shadow_msrp &= ~MSRP_DEP;
1964 if (prot_bitmap & MSR_PMM)
1965 vcpu->arch.shadow_msrp &= ~MSRP_PMMP;
1970 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
1971 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
1976 #ifdef CONFIG_KVM_E500V2
1977 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1978 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1980 pte->raddr = (vcpu->arch.magic_page_pa & PAGE_MASK) |
1981 (eaddr & ~PAGE_MASK);
1982 pte->vpage = eaddr >> PAGE_SHIFT;
1983 pte->may_read = true;
1984 pte->may_write = true;
1985 pte->may_execute = true;
1991 /* Check the guest TLB. */
1994 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1997 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
2003 /* Do we have a TLB entry at all? */
2007 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
2010 pte->raddr = (gpaddr & PAGE_MASK) | (eaddr & ~PAGE_MASK);
2011 pte->vpage = eaddr >> PAGE_SHIFT;
2013 /* XXX read permissions from the guest TLB */
2014 pte->may_read = true;
2015 pte->may_write = true;
2016 pte->may_execute = true;
2021 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
2022 struct kvm_guest_debug *dbg)
2024 struct debug_reg *dbg_reg;
2025 int n, b = 0, w = 0;
2030 if (!(dbg->control & KVM_GUESTDBG_ENABLE)) {
2031 vcpu->arch.dbg_reg.dbcr0 = 0;
2032 vcpu->guest_debug = 0;
2033 kvm_guest_protect_msr(vcpu, MSR_DE, false);
2037 kvm_guest_protect_msr(vcpu, MSR_DE, true);
2038 vcpu->guest_debug = dbg->control;
2039 vcpu->arch.dbg_reg.dbcr0 = 0;
2041 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
2042 vcpu->arch.dbg_reg.dbcr0 |= DBCR0_IDM | DBCR0_IC;
2044 /* Code below handles only HW breakpoints */
2045 dbg_reg = &(vcpu->arch.dbg_reg);
2047 #ifdef CONFIG_KVM_BOOKE_HV
2049 * On BookE-HV (e500mc) the guest is always executed with MSR.GS=1
2050 * DBCR1 and DBCR2 are set to trigger debug events when MSR.PR is 0
2056 * On BookE-PR (e500v2) the guest is always executed with MSR.PR=1
2057 * We set DBCR1 and DBCR2 to only trigger debug events when MSR.PR
2060 dbg_reg->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US | DBCR1_IAC3US |
2062 dbg_reg->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US;
2065 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
2069 for (n = 0; n < (KVMPPC_BOOKE_IAC_NUM + KVMPPC_BOOKE_DAC_NUM); n++) {
2070 uint64_t addr = dbg->arch.bp[n].addr;
2071 uint32_t type = dbg->arch.bp[n].type;
2073 if (type == KVMPPC_DEBUG_NONE)
2076 if (type & ~(KVMPPC_DEBUG_WATCH_READ |
2077 KVMPPC_DEBUG_WATCH_WRITE |
2078 KVMPPC_DEBUG_BREAKPOINT))
2081 if (type & KVMPPC_DEBUG_BREAKPOINT) {
2082 /* Setting H/W breakpoint */
2083 if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++))
2086 /* Setting H/W watchpoint */
2087 if (kvmppc_booke_add_watchpoint(dbg_reg, addr,
2099 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2101 vcpu->cpu = smp_processor_id();
2102 current->thread.kvm_vcpu = vcpu;
2105 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
2107 current->thread.kvm_vcpu = NULL;
2110 /* Clear pending debug event in DBSR */
2111 kvmppc_clear_dbsr();
2114 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
2116 vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
2119 int kvmppc_core_init_vm(struct kvm *kvm)
2121 return kvm->arch.kvm_ops->init_vm(kvm);
2124 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
2126 return kvm->arch.kvm_ops->vcpu_create(kvm, id);
2129 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
2131 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
2134 void kvmppc_core_destroy_vm(struct kvm *kvm)
2136 kvm->arch.kvm_ops->destroy_vm(kvm);
2139 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2141 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
2144 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
2146 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
2149 int __init kvmppc_booke_init(void)
2151 #ifndef CONFIG_KVM_BOOKE_HV
2152 unsigned long ivor[16];
2153 unsigned long *handler = kvmppc_booke_handler_addr;
2154 unsigned long max_ivor = 0;
2155 unsigned long handler_len;
2158 /* We install our own exception handlers by hijacking IVPR. IVPR must
2159 * be 16-bit aligned, so we need a 64KB allocation. */
2160 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
2162 if (!kvmppc_booke_handlers)
2165 /* XXX make sure our handlers are smaller than Linux's */
2167 /* Copy our interrupt handlers to match host IVORs. That way we don't
2168 * have to swap the IVORs on every guest/host transition. */
2169 ivor[0] = mfspr(SPRN_IVOR0);
2170 ivor[1] = mfspr(SPRN_IVOR1);
2171 ivor[2] = mfspr(SPRN_IVOR2);
2172 ivor[3] = mfspr(SPRN_IVOR3);
2173 ivor[4] = mfspr(SPRN_IVOR4);
2174 ivor[5] = mfspr(SPRN_IVOR5);
2175 ivor[6] = mfspr(SPRN_IVOR6);
2176 ivor[7] = mfspr(SPRN_IVOR7);
2177 ivor[8] = mfspr(SPRN_IVOR8);
2178 ivor[9] = mfspr(SPRN_IVOR9);
2179 ivor[10] = mfspr(SPRN_IVOR10);
2180 ivor[11] = mfspr(SPRN_IVOR11);
2181 ivor[12] = mfspr(SPRN_IVOR12);
2182 ivor[13] = mfspr(SPRN_IVOR13);
2183 ivor[14] = mfspr(SPRN_IVOR14);
2184 ivor[15] = mfspr(SPRN_IVOR15);
2186 for (i = 0; i < 16; i++) {
2187 if (ivor[i] > max_ivor)
2190 handler_len = handler[i + 1] - handler[i];
2191 memcpy((void *)kvmppc_booke_handlers + ivor[i],
2192 (void *)handler[i], handler_len);
2195 handler_len = handler[max_ivor + 1] - handler[max_ivor];
2196 flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers +
2197 ivor[max_ivor] + handler_len);
2198 #endif /* !BOOKE_HV */
2202 void __exit kvmppc_booke_exit(void)
2204 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);