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 <asm/uaccess.h>
34 #include <asm/kvm_ppc.h>
35 #include <asm/cacheflush.h>
36 #include <asm/dbell.h>
37 #include <asm/hw_irq.h>
45 unsigned long kvmppc_booke_handlers;
47 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
48 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
50 struct kvm_stats_debugfs_item debugfs_entries[] = {
51 { "mmio", VCPU_STAT(mmio_exits) },
52 { "dcr", VCPU_STAT(dcr_exits) },
53 { "sig", VCPU_STAT(signal_exits) },
54 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
55 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
56 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) },
57 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) },
58 { "sysc", VCPU_STAT(syscall_exits) },
59 { "isi", VCPU_STAT(isi_exits) },
60 { "dsi", VCPU_STAT(dsi_exits) },
61 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
62 { "dec", VCPU_STAT(dec_exits) },
63 { "ext_intr", VCPU_STAT(ext_intr_exits) },
64 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
65 { "doorbell", VCPU_STAT(dbell_exits) },
66 { "guest doorbell", VCPU_STAT(gdbell_exits) },
67 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
71 /* TODO: use vcpu_printf() */
72 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
76 printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
77 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
78 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
79 vcpu->arch.shared->srr1);
81 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
83 for (i = 0; i < 32; i += 4) {
84 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
85 kvmppc_get_gpr(vcpu, i),
86 kvmppc_get_gpr(vcpu, i+1),
87 kvmppc_get_gpr(vcpu, i+2),
88 kvmppc_get_gpr(vcpu, i+3));
93 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
97 kvmppc_save_guest_spe(vcpu);
98 vcpu->arch.shadow_msr &= ~MSR_SPE;
102 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
106 kvmppc_load_guest_spe(vcpu);
107 vcpu->arch.shadow_msr |= MSR_SPE;
111 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
113 if (vcpu->arch.shared->msr & MSR_SPE) {
114 if (!(vcpu->arch.shadow_msr & MSR_SPE))
115 kvmppc_vcpu_enable_spe(vcpu);
116 } else if (vcpu->arch.shadow_msr & MSR_SPE) {
117 kvmppc_vcpu_disable_spe(vcpu);
121 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
126 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
128 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV)
129 /* We always treat the FP bit as enabled from the host
130 perspective, so only need to adjust the shadow MSR */
131 vcpu->arch.shadow_msr &= ~MSR_FP;
132 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP;
137 * Helper function for "full" MSR writes. No need to call this if only
138 * EE/CE/ME/DE/RI are changing.
140 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
142 u32 old_msr = vcpu->arch.shared->msr;
144 #ifdef CONFIG_KVM_BOOKE_HV
148 vcpu->arch.shared->msr = new_msr;
150 kvmppc_mmu_msr_notify(vcpu, old_msr);
151 kvmppc_vcpu_sync_spe(vcpu);
152 kvmppc_vcpu_sync_fpu(vcpu);
155 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
156 unsigned int priority)
158 trace_kvm_booke_queue_irqprio(vcpu, priority);
159 set_bit(priority, &vcpu->arch.pending_exceptions);
162 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
163 ulong dear_flags, ulong esr_flags)
165 vcpu->arch.queued_dear = dear_flags;
166 vcpu->arch.queued_esr = esr_flags;
167 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
170 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
171 ulong dear_flags, ulong esr_flags)
173 vcpu->arch.queued_dear = dear_flags;
174 vcpu->arch.queued_esr = esr_flags;
175 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
178 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
181 vcpu->arch.queued_esr = esr_flags;
182 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
185 static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags,
188 vcpu->arch.queued_dear = dear_flags;
189 vcpu->arch.queued_esr = esr_flags;
190 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT);
193 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
195 vcpu->arch.queued_esr = esr_flags;
196 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
199 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
201 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
204 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
206 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
209 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
211 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
214 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
215 struct kvm_interrupt *irq)
217 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
219 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
220 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
222 kvmppc_booke_queue_irqprio(vcpu, prio);
225 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
227 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
228 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
231 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu)
233 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG);
236 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu)
238 clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions);
241 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
243 #ifdef CONFIG_KVM_BOOKE_HV
244 mtspr(SPRN_GSRR0, srr0);
245 mtspr(SPRN_GSRR1, srr1);
247 vcpu->arch.shared->srr0 = srr0;
248 vcpu->arch.shared->srr1 = srr1;
252 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
254 vcpu->arch.csrr0 = srr0;
255 vcpu->arch.csrr1 = srr1;
258 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
260 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
261 vcpu->arch.dsrr0 = srr0;
262 vcpu->arch.dsrr1 = srr1;
264 set_guest_csrr(vcpu, srr0, srr1);
268 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
270 vcpu->arch.mcsrr0 = srr0;
271 vcpu->arch.mcsrr1 = srr1;
274 static unsigned long get_guest_dear(struct kvm_vcpu *vcpu)
276 #ifdef CONFIG_KVM_BOOKE_HV
277 return mfspr(SPRN_GDEAR);
279 return vcpu->arch.shared->dar;
283 static void set_guest_dear(struct kvm_vcpu *vcpu, unsigned long dear)
285 #ifdef CONFIG_KVM_BOOKE_HV
286 mtspr(SPRN_GDEAR, dear);
288 vcpu->arch.shared->dar = dear;
292 static unsigned long get_guest_esr(struct kvm_vcpu *vcpu)
294 #ifdef CONFIG_KVM_BOOKE_HV
295 return mfspr(SPRN_GESR);
297 return vcpu->arch.shared->esr;
301 static void set_guest_esr(struct kvm_vcpu *vcpu, u32 esr)
303 #ifdef CONFIG_KVM_BOOKE_HV
304 mtspr(SPRN_GESR, esr);
306 vcpu->arch.shared->esr = esr;
310 static unsigned long get_guest_epr(struct kvm_vcpu *vcpu)
312 #ifdef CONFIG_KVM_BOOKE_HV
313 return mfspr(SPRN_GEPR);
315 return vcpu->arch.epr;
319 /* Deliver the interrupt of the corresponding priority, if possible. */
320 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
321 unsigned int priority)
325 bool update_esr = false, update_dear = false, update_epr = false;
326 ulong crit_raw = vcpu->arch.shared->critical;
327 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
329 bool keep_irq = false;
330 enum int_class int_class;
331 ulong new_msr = vcpu->arch.shared->msr;
333 /* Truncate crit indicators in 32 bit mode */
334 if (!(vcpu->arch.shared->msr & MSR_SF)) {
335 crit_raw &= 0xffffffff;
336 crit_r1 &= 0xffffffff;
339 /* Critical section when crit == r1 */
340 crit = (crit_raw == crit_r1);
341 /* ... and we're in supervisor mode */
342 crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
344 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
345 priority = BOOKE_IRQPRIO_EXTERNAL;
349 if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags)
353 case BOOKE_IRQPRIO_DTLB_MISS:
354 case BOOKE_IRQPRIO_DATA_STORAGE:
355 case BOOKE_IRQPRIO_ALIGNMENT:
358 case BOOKE_IRQPRIO_INST_STORAGE:
359 case BOOKE_IRQPRIO_PROGRAM:
362 case BOOKE_IRQPRIO_ITLB_MISS:
363 case BOOKE_IRQPRIO_SYSCALL:
364 case BOOKE_IRQPRIO_FP_UNAVAIL:
365 case BOOKE_IRQPRIO_SPE_UNAVAIL:
366 case BOOKE_IRQPRIO_SPE_FP_DATA:
367 case BOOKE_IRQPRIO_SPE_FP_ROUND:
368 case BOOKE_IRQPRIO_AP_UNAVAIL:
370 msr_mask = MSR_CE | MSR_ME | MSR_DE;
371 int_class = INT_CLASS_NONCRIT;
373 case BOOKE_IRQPRIO_WATCHDOG:
374 case BOOKE_IRQPRIO_CRITICAL:
375 case BOOKE_IRQPRIO_DBELL_CRIT:
376 allowed = vcpu->arch.shared->msr & MSR_CE;
377 allowed = allowed && !crit;
379 int_class = INT_CLASS_CRIT;
381 case BOOKE_IRQPRIO_MACHINE_CHECK:
382 allowed = vcpu->arch.shared->msr & MSR_ME;
383 allowed = allowed && !crit;
384 int_class = INT_CLASS_MC;
386 case BOOKE_IRQPRIO_DECREMENTER:
387 case BOOKE_IRQPRIO_FIT:
390 case BOOKE_IRQPRIO_EXTERNAL:
391 case BOOKE_IRQPRIO_DBELL:
392 allowed = vcpu->arch.shared->msr & MSR_EE;
393 allowed = allowed && !crit;
394 msr_mask = MSR_CE | MSR_ME | MSR_DE;
395 int_class = INT_CLASS_NONCRIT;
397 case BOOKE_IRQPRIO_DEBUG:
398 allowed = vcpu->arch.shared->msr & MSR_DE;
399 allowed = allowed && !crit;
401 int_class = INT_CLASS_CRIT;
407 case INT_CLASS_NONCRIT:
408 set_guest_srr(vcpu, vcpu->arch.pc,
409 vcpu->arch.shared->msr);
412 set_guest_csrr(vcpu, vcpu->arch.pc,
413 vcpu->arch.shared->msr);
416 set_guest_dsrr(vcpu, vcpu->arch.pc,
417 vcpu->arch.shared->msr);
420 set_guest_mcsrr(vcpu, vcpu->arch.pc,
421 vcpu->arch.shared->msr);
425 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
426 if (update_esr == true)
427 set_guest_esr(vcpu, vcpu->arch.queued_esr);
428 if (update_dear == true)
429 set_guest_dear(vcpu, vcpu->arch.queued_dear);
430 if (update_epr == true) {
431 if (vcpu->arch.epr_flags & KVMPPC_EPR_USER)
432 kvm_make_request(KVM_REQ_EPR_EXIT, vcpu);
433 else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) {
434 BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC);
435 kvmppc_mpic_set_epr(vcpu);
440 #if defined(CONFIG_64BIT)
441 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
444 kvmppc_set_msr(vcpu, new_msr);
447 clear_bit(priority, &vcpu->arch.pending_exceptions);
450 #ifdef CONFIG_KVM_BOOKE_HV
452 * If an interrupt is pending but masked, raise a guest doorbell
453 * so that we are notified when the guest enables the relevant
456 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
457 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
458 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
459 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
460 if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
461 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
468 * Return the number of jiffies until the next timeout. If the timeout is
469 * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA
470 * because the larger value can break the timer APIs.
472 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu)
474 u64 tb, wdt_tb, wdt_ticks = 0;
476 u32 period = TCR_GET_WP(vcpu->arch.tcr);
478 wdt_tb = 1ULL << (63 - period);
481 * The watchdog timeout will hapeen when TB bit corresponding
482 * to watchdog will toggle from 0 to 1.
487 wdt_ticks += wdt_tb - (tb & (wdt_tb - 1));
489 /* Convert timebase ticks to jiffies */
490 nr_jiffies = wdt_ticks;
492 if (do_div(nr_jiffies, tb_ticks_per_jiffy))
495 return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA);
498 static void arm_next_watchdog(struct kvm_vcpu *vcpu)
500 unsigned long nr_jiffies;
504 * If TSR_ENW and TSR_WIS are not set then no need to exit to
505 * userspace, so clear the KVM_REQ_WATCHDOG request.
507 if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS))
508 clear_bit(KVM_REQ_WATCHDOG, &vcpu->requests);
510 spin_lock_irqsave(&vcpu->arch.wdt_lock, flags);
511 nr_jiffies = watchdog_next_timeout(vcpu);
513 * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA
514 * then do not run the watchdog timer as this can break timer APIs.
516 if (nr_jiffies < NEXT_TIMER_MAX_DELTA)
517 mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies);
519 del_timer(&vcpu->arch.wdt_timer);
520 spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags);
523 void kvmppc_watchdog_func(unsigned long data)
525 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
530 new_tsr = tsr = vcpu->arch.tsr;
538 new_tsr = tsr | TSR_WIS;
540 new_tsr = tsr | TSR_ENW;
542 } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr);
544 if (new_tsr & TSR_WIS) {
546 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
551 * If this is final watchdog expiry and some action is required
552 * then exit to userspace.
554 if (final && (vcpu->arch.tcr & TCR_WRC_MASK) &&
555 vcpu->arch.watchdog_enabled) {
557 kvm_make_request(KVM_REQ_WATCHDOG, vcpu);
562 * Stop running the watchdog timer after final expiration to
563 * prevent the host from being flooded with timers if the
564 * guest sets a short period.
565 * Timers will resume when TSR/TCR is updated next time.
568 arm_next_watchdog(vcpu);
571 static void update_timer_ints(struct kvm_vcpu *vcpu)
573 if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
574 kvmppc_core_queue_dec(vcpu);
576 kvmppc_core_dequeue_dec(vcpu);
578 if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS))
579 kvmppc_core_queue_watchdog(vcpu);
581 kvmppc_core_dequeue_watchdog(vcpu);
584 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
586 unsigned long *pending = &vcpu->arch.pending_exceptions;
587 unsigned int priority;
589 priority = __ffs(*pending);
590 while (priority < BOOKE_IRQPRIO_MAX) {
591 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
594 priority = find_next_bit(pending,
595 BITS_PER_BYTE * sizeof(*pending),
599 /* Tell the guest about our interrupt status */
600 vcpu->arch.shared->int_pending = !!*pending;
603 /* Check pending exceptions and deliver one, if possible. */
604 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
607 WARN_ON_ONCE(!irqs_disabled());
609 kvmppc_core_check_exceptions(vcpu);
611 if (vcpu->requests) {
612 /* Exception delivery raised request; start over */
616 if (vcpu->arch.shared->msr & MSR_WE) {
618 kvm_vcpu_block(vcpu);
619 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
622 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
629 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
631 int r = 1; /* Indicate we want to get back into the guest */
633 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
634 update_timer_ints(vcpu);
635 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
636 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
637 kvmppc_core_flush_tlb(vcpu);
640 if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) {
641 vcpu->run->exit_reason = KVM_EXIT_WATCHDOG;
645 if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) {
646 vcpu->run->epr.epr = 0;
647 vcpu->arch.epr_needed = true;
648 vcpu->run->exit_reason = KVM_EXIT_EPR;
655 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
658 #ifdef CONFIG_PPC_FPU
664 if (!vcpu->arch.sane) {
665 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
670 s = kvmppc_prepare_to_enter(vcpu);
676 kvmppc_lazy_ee_enable();
680 #ifdef CONFIG_PPC_FPU
681 /* Save userspace FPU state in stack */
683 memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
684 fpscr = current->thread.fpscr.val;
685 fpexc_mode = current->thread.fpexc_mode;
687 /* Restore guest FPU state to thread */
688 memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr));
689 current->thread.fpscr.val = vcpu->arch.fpscr;
692 * Since we can't trap on MSR_FP in GS-mode, we consider the guest
693 * as always using the FPU. Kernel usage of FP (via
694 * enable_kernel_fp()) in this thread must not occur while
695 * vcpu->fpu_active is set.
697 vcpu->fpu_active = 1;
699 kvmppc_load_guest_fp(vcpu);
702 ret = __kvmppc_vcpu_run(kvm_run, vcpu);
704 /* No need for kvm_guest_exit. It's done in handle_exit.
705 We also get here with interrupts enabled. */
707 #ifdef CONFIG_PPC_FPU
708 kvmppc_save_guest_fp(vcpu);
710 vcpu->fpu_active = 0;
712 /* Save guest FPU state from thread */
713 memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr));
714 vcpu->arch.fpscr = current->thread.fpscr.val;
716 /* Restore userspace FPU state from stack */
717 memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
718 current->thread.fpscr.val = fpscr;
719 current->thread.fpexc_mode = fpexc_mode;
723 vcpu->mode = OUTSIDE_GUEST_MODE;
727 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
729 enum emulation_result er;
731 er = kvmppc_emulate_instruction(run, vcpu);
734 /* don't overwrite subtypes, just account kvm_stats */
735 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
736 /* Future optimization: only reload non-volatiles if
737 * they were actually modified by emulation. */
738 return RESUME_GUEST_NV;
741 run->exit_reason = KVM_EXIT_DCR;
745 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
746 __func__, vcpu->arch.pc, vcpu->arch.last_inst);
747 /* For debugging, encode the failing instruction and
748 * report it to userspace. */
749 run->hw.hardware_exit_reason = ~0ULL << 32;
750 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
751 kvmppc_core_queue_program(vcpu, ESR_PIL);
754 case EMULATE_EXIT_USER:
762 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
764 ulong r1, ip, msr, lr;
766 asm("mr %0, 1" : "=r"(r1));
767 asm("mflr %0" : "=r"(lr));
768 asm("mfmsr %0" : "=r"(msr));
769 asm("bl 1f; 1: mflr %0" : "=r"(ip));
771 memset(regs, 0, sizeof(*regs));
779 * For interrupts needed to be handled by host interrupt handlers,
780 * corresponding host handler are called from here in similar way
781 * (but not exact) as they are called from low level handler
782 * (such as from arch/powerpc/kernel/head_fsl_booke.S).
784 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
785 unsigned int exit_nr)
790 case BOOKE_INTERRUPT_EXTERNAL:
791 kvmppc_fill_pt_regs(®s);
794 case BOOKE_INTERRUPT_DECREMENTER:
795 kvmppc_fill_pt_regs(®s);
796 timer_interrupt(®s);
798 #if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64)
799 case BOOKE_INTERRUPT_DOORBELL:
800 kvmppc_fill_pt_regs(®s);
801 doorbell_exception(®s);
804 case BOOKE_INTERRUPT_MACHINE_CHECK:
807 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
808 kvmppc_fill_pt_regs(®s);
809 performance_monitor_exception(®s);
811 case BOOKE_INTERRUPT_WATCHDOG:
812 kvmppc_fill_pt_regs(®s);
813 #ifdef CONFIG_BOOKE_WDT
814 WatchdogException(®s);
816 unknown_exception(®s);
819 case BOOKE_INTERRUPT_CRITICAL:
820 unknown_exception(®s);
828 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
830 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
831 unsigned int exit_nr)
836 /* update before a new last_exit_type is rewritten */
837 kvmppc_update_timing_stats(vcpu);
839 /* restart interrupts if they were meant for the host */
840 kvmppc_restart_interrupt(vcpu, exit_nr);
844 trace_kvm_exit(exit_nr, vcpu);
847 run->exit_reason = KVM_EXIT_UNKNOWN;
848 run->ready_for_interrupt_injection = 1;
851 case BOOKE_INTERRUPT_MACHINE_CHECK:
852 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
853 kvmppc_dump_vcpu(vcpu);
854 /* For debugging, send invalid exit reason to user space */
855 run->hw.hardware_exit_reason = ~1ULL << 32;
856 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
860 case BOOKE_INTERRUPT_EXTERNAL:
861 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
865 case BOOKE_INTERRUPT_DECREMENTER:
866 kvmppc_account_exit(vcpu, DEC_EXITS);
870 case BOOKE_INTERRUPT_WATCHDOG:
874 case BOOKE_INTERRUPT_DOORBELL:
875 kvmppc_account_exit(vcpu, DBELL_EXITS);
879 case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
880 kvmppc_account_exit(vcpu, GDBELL_EXITS);
883 * We are here because there is a pending guest interrupt
884 * which could not be delivered as MSR_CE or MSR_ME was not
885 * set. Once we break from here we will retry delivery.
890 case BOOKE_INTERRUPT_GUEST_DBELL:
891 kvmppc_account_exit(vcpu, GDBELL_EXITS);
894 * We are here because there is a pending guest interrupt
895 * which could not be delivered as MSR_EE was not set. Once
896 * we break from here we will retry delivery.
901 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
905 case BOOKE_INTERRUPT_HV_PRIV:
906 r = emulation_exit(run, vcpu);
909 case BOOKE_INTERRUPT_PROGRAM:
910 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
912 * Program traps generated by user-level software must
913 * be handled by the guest kernel.
915 * In GS mode, hypervisor privileged instructions trap
916 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
917 * actual program interrupts, handled by the guest.
919 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
921 kvmppc_account_exit(vcpu, USR_PR_INST);
925 r = emulation_exit(run, vcpu);
928 case BOOKE_INTERRUPT_FP_UNAVAIL:
929 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
930 kvmppc_account_exit(vcpu, FP_UNAVAIL);
935 case BOOKE_INTERRUPT_SPE_UNAVAIL: {
936 if (vcpu->arch.shared->msr & MSR_SPE)
937 kvmppc_vcpu_enable_spe(vcpu);
939 kvmppc_booke_queue_irqprio(vcpu,
940 BOOKE_IRQPRIO_SPE_UNAVAIL);
945 case BOOKE_INTERRUPT_SPE_FP_DATA:
946 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
950 case BOOKE_INTERRUPT_SPE_FP_ROUND:
951 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
955 case BOOKE_INTERRUPT_SPE_UNAVAIL:
957 * Guest wants SPE, but host kernel doesn't support it. Send
958 * an "unimplemented operation" program check to the guest.
960 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
965 * These really should never happen without CONFIG_SPE,
966 * as we should never enable the real MSR[SPE] in the guest.
968 case BOOKE_INTERRUPT_SPE_FP_DATA:
969 case BOOKE_INTERRUPT_SPE_FP_ROUND:
970 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
971 __func__, exit_nr, vcpu->arch.pc);
972 run->hw.hardware_exit_reason = exit_nr;
977 case BOOKE_INTERRUPT_DATA_STORAGE:
978 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
979 vcpu->arch.fault_esr);
980 kvmppc_account_exit(vcpu, DSI_EXITS);
984 case BOOKE_INTERRUPT_INST_STORAGE:
985 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
986 kvmppc_account_exit(vcpu, ISI_EXITS);
990 case BOOKE_INTERRUPT_ALIGNMENT:
991 kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear,
992 vcpu->arch.fault_esr);
996 #ifdef CONFIG_KVM_BOOKE_HV
997 case BOOKE_INTERRUPT_HV_SYSCALL:
998 if (!(vcpu->arch.shared->msr & MSR_PR)) {
999 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1002 * hcall from guest userspace -- send privileged
1003 * instruction program check.
1005 kvmppc_core_queue_program(vcpu, ESR_PPR);
1011 case BOOKE_INTERRUPT_SYSCALL:
1012 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1013 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1014 /* KVM PV hypercalls */
1015 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1018 /* Guest syscalls */
1019 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
1021 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
1026 case BOOKE_INTERRUPT_DTLB_MISS: {
1027 unsigned long eaddr = vcpu->arch.fault_dear;
1032 #ifdef CONFIG_KVM_E500V2
1033 if (!(vcpu->arch.shared->msr & MSR_PR) &&
1034 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1035 kvmppc_map_magic(vcpu);
1036 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1043 /* Check the guest TLB. */
1044 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1045 if (gtlb_index < 0) {
1046 /* The guest didn't have a mapping for it. */
1047 kvmppc_core_queue_dtlb_miss(vcpu,
1048 vcpu->arch.fault_dear,
1049 vcpu->arch.fault_esr);
1050 kvmppc_mmu_dtlb_miss(vcpu);
1051 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
1056 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1057 gfn = gpaddr >> PAGE_SHIFT;
1059 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1060 /* The guest TLB had a mapping, but the shadow TLB
1061 * didn't, and it is RAM. This could be because:
1062 * a) the entry is mapping the host kernel, or
1063 * b) the guest used a large mapping which we're faking
1064 * Either way, we need to satisfy the fault without
1065 * invoking the guest. */
1066 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1067 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1070 /* Guest has mapped and accessed a page which is not
1072 vcpu->arch.paddr_accessed = gpaddr;
1073 vcpu->arch.vaddr_accessed = eaddr;
1074 r = kvmppc_emulate_mmio(run, vcpu);
1075 kvmppc_account_exit(vcpu, MMIO_EXITS);
1081 case BOOKE_INTERRUPT_ITLB_MISS: {
1082 unsigned long eaddr = vcpu->arch.pc;
1089 /* Check the guest TLB. */
1090 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1091 if (gtlb_index < 0) {
1092 /* The guest didn't have a mapping for it. */
1093 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
1094 kvmppc_mmu_itlb_miss(vcpu);
1095 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
1099 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
1101 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1102 gfn = gpaddr >> PAGE_SHIFT;
1104 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1105 /* The guest TLB had a mapping, but the shadow TLB
1106 * didn't. This could be because:
1107 * a) the entry is mapping the host kernel, or
1108 * b) the guest used a large mapping which we're faking
1109 * Either way, we need to satisfy the fault without
1110 * invoking the guest. */
1111 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1113 /* Guest mapped and leaped at non-RAM! */
1114 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
1120 case BOOKE_INTERRUPT_DEBUG: {
1123 vcpu->arch.pc = mfspr(SPRN_CSRR0);
1125 /* clear IAC events in DBSR register */
1126 dbsr = mfspr(SPRN_DBSR);
1127 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
1128 mtspr(SPRN_DBSR, dbsr);
1130 run->exit_reason = KVM_EXIT_DEBUG;
1131 kvmppc_account_exit(vcpu, DEBUG_EXITS);
1137 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
1142 * To avoid clobbering exit_reason, only check for signals if we
1143 * aren't already exiting to userspace for some other reason.
1145 if (!(r & RESUME_HOST)) {
1146 local_irq_disable();
1147 s = kvmppc_prepare_to_enter(vcpu);
1150 r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
1152 kvmppc_lazy_ee_enable();
1159 static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr)
1161 u32 old_tsr = vcpu->arch.tsr;
1163 vcpu->arch.tsr = new_tsr;
1165 if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS))
1166 arm_next_watchdog(vcpu);
1168 update_timer_ints(vcpu);
1171 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
1172 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1178 vcpu->arch.shared->pir = vcpu->vcpu_id;
1179 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
1180 kvmppc_set_msr(vcpu, 0);
1182 #ifndef CONFIG_KVM_BOOKE_HV
1183 vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
1184 vcpu->arch.shadow_pid = 1;
1185 vcpu->arch.shared->msr = 0;
1188 /* Eye-catching numbers so we know if the guest takes an interrupt
1189 * before it's programmed its own IVPR/IVORs. */
1190 vcpu->arch.ivpr = 0x55550000;
1191 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
1192 vcpu->arch.ivor[i] = 0x7700 | i * 4;
1194 kvmppc_init_timing_stats(vcpu);
1196 r = kvmppc_core_vcpu_setup(vcpu);
1197 kvmppc_sanity_check(vcpu);
1201 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
1203 /* setup watchdog timer once */
1204 spin_lock_init(&vcpu->arch.wdt_lock);
1205 setup_timer(&vcpu->arch.wdt_timer, kvmppc_watchdog_func,
1206 (unsigned long)vcpu);
1211 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
1213 del_timer_sync(&vcpu->arch.wdt_timer);
1216 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1220 regs->pc = vcpu->arch.pc;
1221 regs->cr = kvmppc_get_cr(vcpu);
1222 regs->ctr = vcpu->arch.ctr;
1223 regs->lr = vcpu->arch.lr;
1224 regs->xer = kvmppc_get_xer(vcpu);
1225 regs->msr = vcpu->arch.shared->msr;
1226 regs->srr0 = vcpu->arch.shared->srr0;
1227 regs->srr1 = vcpu->arch.shared->srr1;
1228 regs->pid = vcpu->arch.pid;
1229 regs->sprg0 = vcpu->arch.shared->sprg0;
1230 regs->sprg1 = vcpu->arch.shared->sprg1;
1231 regs->sprg2 = vcpu->arch.shared->sprg2;
1232 regs->sprg3 = vcpu->arch.shared->sprg3;
1233 regs->sprg4 = vcpu->arch.shared->sprg4;
1234 regs->sprg5 = vcpu->arch.shared->sprg5;
1235 regs->sprg6 = vcpu->arch.shared->sprg6;
1236 regs->sprg7 = vcpu->arch.shared->sprg7;
1238 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1239 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1244 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1248 vcpu->arch.pc = regs->pc;
1249 kvmppc_set_cr(vcpu, regs->cr);
1250 vcpu->arch.ctr = regs->ctr;
1251 vcpu->arch.lr = regs->lr;
1252 kvmppc_set_xer(vcpu, regs->xer);
1253 kvmppc_set_msr(vcpu, regs->msr);
1254 vcpu->arch.shared->srr0 = regs->srr0;
1255 vcpu->arch.shared->srr1 = regs->srr1;
1256 kvmppc_set_pid(vcpu, regs->pid);
1257 vcpu->arch.shared->sprg0 = regs->sprg0;
1258 vcpu->arch.shared->sprg1 = regs->sprg1;
1259 vcpu->arch.shared->sprg2 = regs->sprg2;
1260 vcpu->arch.shared->sprg3 = regs->sprg3;
1261 vcpu->arch.shared->sprg4 = regs->sprg4;
1262 vcpu->arch.shared->sprg5 = regs->sprg5;
1263 vcpu->arch.shared->sprg6 = regs->sprg6;
1264 vcpu->arch.shared->sprg7 = regs->sprg7;
1266 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1267 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1272 static void get_sregs_base(struct kvm_vcpu *vcpu,
1273 struct kvm_sregs *sregs)
1277 sregs->u.e.features |= KVM_SREGS_E_BASE;
1279 sregs->u.e.csrr0 = vcpu->arch.csrr0;
1280 sregs->u.e.csrr1 = vcpu->arch.csrr1;
1281 sregs->u.e.mcsr = vcpu->arch.mcsr;
1282 sregs->u.e.esr = get_guest_esr(vcpu);
1283 sregs->u.e.dear = get_guest_dear(vcpu);
1284 sregs->u.e.tsr = vcpu->arch.tsr;
1285 sregs->u.e.tcr = vcpu->arch.tcr;
1286 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1288 sregs->u.e.vrsave = vcpu->arch.vrsave;
1291 static int set_sregs_base(struct kvm_vcpu *vcpu,
1292 struct kvm_sregs *sregs)
1294 if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1297 vcpu->arch.csrr0 = sregs->u.e.csrr0;
1298 vcpu->arch.csrr1 = sregs->u.e.csrr1;
1299 vcpu->arch.mcsr = sregs->u.e.mcsr;
1300 set_guest_esr(vcpu, sregs->u.e.esr);
1301 set_guest_dear(vcpu, sregs->u.e.dear);
1302 vcpu->arch.vrsave = sregs->u.e.vrsave;
1303 kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1305 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1306 vcpu->arch.dec = sregs->u.e.dec;
1307 kvmppc_emulate_dec(vcpu);
1310 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR)
1311 kvmppc_set_tsr(vcpu, sregs->u.e.tsr);
1316 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1317 struct kvm_sregs *sregs)
1319 sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1321 sregs->u.e.pir = vcpu->vcpu_id;
1322 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1323 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1324 sregs->u.e.decar = vcpu->arch.decar;
1325 sregs->u.e.ivpr = vcpu->arch.ivpr;
1328 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1329 struct kvm_sregs *sregs)
1331 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1334 if (sregs->u.e.pir != vcpu->vcpu_id)
1337 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1338 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1339 vcpu->arch.decar = sregs->u.e.decar;
1340 vcpu->arch.ivpr = sregs->u.e.ivpr;
1345 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1347 sregs->u.e.features |= KVM_SREGS_E_IVOR;
1349 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1350 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1351 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1352 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1353 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1354 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1355 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1356 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1357 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1358 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1359 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1360 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1361 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1362 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1363 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1364 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1367 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1369 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1372 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1373 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1374 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1375 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1376 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1377 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1378 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1379 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1380 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1381 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1382 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1383 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1384 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1385 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1386 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1387 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1392 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1393 struct kvm_sregs *sregs)
1395 sregs->pvr = vcpu->arch.pvr;
1397 get_sregs_base(vcpu, sregs);
1398 get_sregs_arch206(vcpu, sregs);
1399 kvmppc_core_get_sregs(vcpu, sregs);
1403 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1404 struct kvm_sregs *sregs)
1408 if (vcpu->arch.pvr != sregs->pvr)
1411 ret = set_sregs_base(vcpu, sregs);
1415 ret = set_sregs_arch206(vcpu, sregs);
1419 return kvmppc_core_set_sregs(vcpu, sregs);
1422 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1425 union kvmppc_one_reg val;
1429 size = one_reg_size(reg->id);
1430 if (size > sizeof(val))
1434 case KVM_REG_PPC_IAC1:
1435 case KVM_REG_PPC_IAC2:
1436 case KVM_REG_PPC_IAC3:
1437 case KVM_REG_PPC_IAC4:
1438 i = reg->id - KVM_REG_PPC_IAC1;
1439 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.iac[i]);
1441 case KVM_REG_PPC_DAC1:
1442 case KVM_REG_PPC_DAC2:
1443 i = reg->id - KVM_REG_PPC_DAC1;
1444 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.dac[i]);
1446 case KVM_REG_PPC_EPR: {
1447 u32 epr = get_guest_epr(vcpu);
1448 val = get_reg_val(reg->id, epr);
1451 #if defined(CONFIG_64BIT)
1452 case KVM_REG_PPC_EPCR:
1453 val = get_reg_val(reg->id, vcpu->arch.epcr);
1456 case KVM_REG_PPC_TCR:
1457 val = get_reg_val(reg->id, vcpu->arch.tcr);
1459 case KVM_REG_PPC_TSR:
1460 val = get_reg_val(reg->id, vcpu->arch.tsr);
1462 case KVM_REG_PPC_DEBUG_INST:
1463 val = get_reg_val(reg->id, KVMPPC_INST_EHPRIV);
1466 r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1473 if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1479 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1482 union kvmppc_one_reg val;
1486 size = one_reg_size(reg->id);
1487 if (size > sizeof(val))
1490 if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1494 case KVM_REG_PPC_IAC1:
1495 case KVM_REG_PPC_IAC2:
1496 case KVM_REG_PPC_IAC3:
1497 case KVM_REG_PPC_IAC4:
1498 i = reg->id - KVM_REG_PPC_IAC1;
1499 vcpu->arch.dbg_reg.iac[i] = set_reg_val(reg->id, val);
1501 case KVM_REG_PPC_DAC1:
1502 case KVM_REG_PPC_DAC2:
1503 i = reg->id - KVM_REG_PPC_DAC1;
1504 vcpu->arch.dbg_reg.dac[i] = set_reg_val(reg->id, val);
1506 case KVM_REG_PPC_EPR: {
1507 u32 new_epr = set_reg_val(reg->id, val);
1508 kvmppc_set_epr(vcpu, new_epr);
1511 #if defined(CONFIG_64BIT)
1512 case KVM_REG_PPC_EPCR: {
1513 u32 new_epcr = set_reg_val(reg->id, val);
1514 kvmppc_set_epcr(vcpu, new_epcr);
1518 case KVM_REG_PPC_OR_TSR: {
1519 u32 tsr_bits = set_reg_val(reg->id, val);
1520 kvmppc_set_tsr_bits(vcpu, tsr_bits);
1523 case KVM_REG_PPC_CLEAR_TSR: {
1524 u32 tsr_bits = set_reg_val(reg->id, val);
1525 kvmppc_clr_tsr_bits(vcpu, tsr_bits);
1528 case KVM_REG_PPC_TSR: {
1529 u32 tsr = set_reg_val(reg->id, val);
1530 kvmppc_set_tsr(vcpu, tsr);
1533 case KVM_REG_PPC_TCR: {
1534 u32 tcr = set_reg_val(reg->id, val);
1535 kvmppc_set_tcr(vcpu, tcr);
1539 r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1546 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1547 struct kvm_guest_debug *dbg)
1552 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1557 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1562 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1563 struct kvm_translation *tr)
1567 r = kvmppc_core_vcpu_translate(vcpu, tr);
1571 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1576 void kvmppc_core_free_memslot(struct kvm_memory_slot *free,
1577 struct kvm_memory_slot *dont)
1581 int kvmppc_core_create_memslot(struct kvm_memory_slot *slot,
1582 unsigned long npages)
1587 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1588 struct kvm_memory_slot *memslot,
1589 struct kvm_userspace_memory_region *mem)
1594 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1595 struct kvm_userspace_memory_region *mem,
1596 const struct kvm_memory_slot *old)
1600 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
1604 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr)
1606 #if defined(CONFIG_64BIT)
1607 vcpu->arch.epcr = new_epcr;
1608 #ifdef CONFIG_KVM_BOOKE_HV
1609 vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM;
1610 if (vcpu->arch.epcr & SPRN_EPCR_ICM)
1611 vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM;
1616 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1618 vcpu->arch.tcr = new_tcr;
1619 arm_next_watchdog(vcpu);
1620 update_timer_ints(vcpu);
1623 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1625 set_bits(tsr_bits, &vcpu->arch.tsr);
1627 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1628 kvm_vcpu_kick(vcpu);
1631 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1633 clear_bits(tsr_bits, &vcpu->arch.tsr);
1636 * We may have stopped the watchdog due to
1637 * being stuck on final expiration.
1639 if (tsr_bits & (TSR_ENW | TSR_WIS))
1640 arm_next_watchdog(vcpu);
1642 update_timer_ints(vcpu);
1645 void kvmppc_decrementer_func(unsigned long data)
1647 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
1649 if (vcpu->arch.tcr & TCR_ARE) {
1650 vcpu->arch.dec = vcpu->arch.decar;
1651 kvmppc_emulate_dec(vcpu);
1654 kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1657 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1659 vcpu->cpu = smp_processor_id();
1660 current->thread.kvm_vcpu = vcpu;
1663 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
1665 current->thread.kvm_vcpu = NULL;
1669 int __init kvmppc_booke_init(void)
1671 #ifndef CONFIG_KVM_BOOKE_HV
1672 unsigned long ivor[16];
1673 unsigned long *handler = kvmppc_booke_handler_addr;
1674 unsigned long max_ivor = 0;
1675 unsigned long handler_len;
1678 /* We install our own exception handlers by hijacking IVPR. IVPR must
1679 * be 16-bit aligned, so we need a 64KB allocation. */
1680 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
1682 if (!kvmppc_booke_handlers)
1685 /* XXX make sure our handlers are smaller than Linux's */
1687 /* Copy our interrupt handlers to match host IVORs. That way we don't
1688 * have to swap the IVORs on every guest/host transition. */
1689 ivor[0] = mfspr(SPRN_IVOR0);
1690 ivor[1] = mfspr(SPRN_IVOR1);
1691 ivor[2] = mfspr(SPRN_IVOR2);
1692 ivor[3] = mfspr(SPRN_IVOR3);
1693 ivor[4] = mfspr(SPRN_IVOR4);
1694 ivor[5] = mfspr(SPRN_IVOR5);
1695 ivor[6] = mfspr(SPRN_IVOR6);
1696 ivor[7] = mfspr(SPRN_IVOR7);
1697 ivor[8] = mfspr(SPRN_IVOR8);
1698 ivor[9] = mfspr(SPRN_IVOR9);
1699 ivor[10] = mfspr(SPRN_IVOR10);
1700 ivor[11] = mfspr(SPRN_IVOR11);
1701 ivor[12] = mfspr(SPRN_IVOR12);
1702 ivor[13] = mfspr(SPRN_IVOR13);
1703 ivor[14] = mfspr(SPRN_IVOR14);
1704 ivor[15] = mfspr(SPRN_IVOR15);
1706 for (i = 0; i < 16; i++) {
1707 if (ivor[i] > max_ivor)
1710 handler_len = handler[i + 1] - handler[i];
1711 memcpy((void *)kvmppc_booke_handlers + ivor[i],
1712 (void *)handler[i], handler_len);
1715 handler_len = handler[max_ivor + 1] - handler[max_ivor];
1716 flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers +
1717 ivor[max_ivor] + handler_len);
1718 #endif /* !BOOKE_HV */
1722 void __exit kvmppc_booke_exit(void)
1724 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);