summaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/kvm_ppc.h
blob: c3877992eff9ac5ac00b96fee0bd42d4fe233e8d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright IBM Corp. 2008
 *
 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
 */

#ifndef __POWERPC_KVM_PPC_H__
#define __POWERPC_KVM_PPC_H__

/* This file exists just so we can dereference kvm_vcpu, avoiding nested header
 * dependencies. */

#include <linux/mutex.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/kvm_types.h>
#include <linux/kvm_host.h>
#include <linux/bug.h>
#ifdef CONFIG_PPC_BOOK3S
#include <asm/kvm_book3s.h>
#else
#include <asm/kvm_booke.h>
#endif
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
#include <asm/paca.h>
#endif

/*
 * KVMPPC_INST_SW_BREAKPOINT is debug Instruction
 * for supporting software breakpoint.
 */
#define KVMPPC_INST_SW_BREAKPOINT	0x00dddd00

enum emulation_result {
	EMULATE_DONE,         /* no further processing */
	EMULATE_DO_MMIO,      /* kvm_run filled with MMIO request */
	EMULATE_FAIL,         /* can't emulate this instruction */
	EMULATE_AGAIN,        /* something went wrong. go again */
	EMULATE_EXIT_USER,    /* emulation requires exit to user-space */
};

enum instruction_type {
	INST_GENERIC,
	INST_SC,		/* system call */
};

enum xlate_instdata {
	XLATE_INST,		/* translate instruction address */
	XLATE_DATA		/* translate data address */
};

enum xlate_readwrite {
	XLATE_READ,		/* check for read permissions */
	XLATE_WRITE		/* check for write permissions */
};

extern int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
extern int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
extern void kvmppc_handler_highmem(void);

extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu);
extern int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
                              unsigned int rt, unsigned int bytes,
			      int is_default_endian);
extern int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
                               unsigned int rt, unsigned int bytes,
			       int is_default_endian);
extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
			       u64 val, unsigned int bytes,
			       int is_default_endian);

extern int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
				 enum instruction_type type, u32 *inst);

extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
		     bool data);
extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
		     bool data);
extern int kvmppc_emulate_instruction(struct kvm_run *run,
                                      struct kvm_vcpu *vcpu);
extern int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu);
extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
extern void kvmppc_emulate_dec(struct kvm_vcpu *vcpu);
extern u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb);
extern void kvmppc_decrementer_func(struct kvm_vcpu *vcpu);
extern int kvmppc_sanity_check(struct kvm_vcpu *vcpu);
extern int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu);
extern void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu);

/* Core-specific hooks */

extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
                           unsigned int gtlb_idx);
extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
extern void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu);
extern int kvmppc_mmu_init(struct kvm_vcpu *vcpu);
extern int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
extern int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
extern gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int gtlb_index,
                              gva_t eaddr);
extern void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu);
extern void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu);
extern int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr,
			enum xlate_instdata xlid, enum xlate_readwrite xlrw,
			struct kvmppc_pte *pte);

extern struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm,
                                                unsigned int id);
extern void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu);
extern int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu);
extern int kvmppc_core_check_processor_compat(void);
extern int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
                                      struct kvm_translation *tr);

extern void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
extern void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu);

extern int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu);
extern int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags);
extern void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu);
extern void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
                                       struct kvm_interrupt *irq);
extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, ulong dear_flags,
					ulong esr_flags);
extern void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
					   ulong dear_flags,
					   ulong esr_flags);
extern void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
					   ulong esr_flags);
extern void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu);
extern int kvmppc_core_check_requests(struct kvm_vcpu *vcpu);

extern int kvmppc_booke_init(void);
extern void kvmppc_booke_exit(void);

extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);

extern int kvmppc_allocate_hpt(struct kvm_hpt_info *info, u32 order);
extern void kvmppc_set_hpt(struct kvm *kvm, struct kvm_hpt_info *info);
extern long kvmppc_alloc_reset_hpt(struct kvm *kvm, int order);
extern void kvmppc_free_hpt(struct kvm_hpt_info *info);
extern long kvmppc_prepare_vrma(struct kvm *kvm,
				struct kvm_userspace_memory_region *mem);
extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu,
			struct kvm_memory_slot *memslot, unsigned long porder);
extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu);

extern long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
				struct kvm_create_spapr_tce_64 *args);
extern struct kvmppc_spapr_tce_table *kvmppc_find_table(
		struct kvm_vcpu *vcpu, unsigned long liobn);
extern long kvmppc_ioba_validate(struct kvmppc_spapr_tce_table *stt,
		unsigned long ioba, unsigned long npages);
extern long kvmppc_tce_validate(struct kvmppc_spapr_tce_table *tt,
		unsigned long tce);
extern long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa,
		unsigned long *ua, unsigned long **prmap);
extern void kvmppc_tce_put(struct kvmppc_spapr_tce_table *tt,
		unsigned long idx, unsigned long tce);
extern long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
			     unsigned long ioba, unsigned long tce);
extern long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu,
		unsigned long liobn, unsigned long ioba,
		unsigned long tce_list, unsigned long npages);
extern long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
		unsigned long liobn, unsigned long ioba,
		unsigned long tce_value, unsigned long npages);
extern long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
			     unsigned long ioba);
extern struct page *kvm_alloc_hpt_cma(unsigned long nr_pages);
extern void kvm_free_hpt_cma(struct page *page, unsigned long nr_pages);
extern int kvmppc_core_init_vm(struct kvm *kvm);
extern void kvmppc_core_destroy_vm(struct kvm *kvm);
extern void kvmppc_core_free_memslot(struct kvm *kvm,
				     struct kvm_memory_slot *free,
				     struct kvm_memory_slot *dont);
extern int kvmppc_core_create_memslot(struct kvm *kvm,
				      struct kvm_memory_slot *slot,
				      unsigned long npages);
extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
				struct kvm_memory_slot *memslot,
				const struct kvm_userspace_memory_region *mem);
extern void kvmppc_core_commit_memory_region(struct kvm *kvm,
				const struct kvm_userspace_memory_region *mem,
				const struct kvm_memory_slot *old,
				const struct kvm_memory_slot *new);
extern int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm,
				      struct kvm_ppc_smmu_info *info);
extern void kvmppc_core_flush_memslot(struct kvm *kvm,
				      struct kvm_memory_slot *memslot);

extern int kvmppc_bookehv_init(void);
extern void kvmppc_bookehv_exit(void);

extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu);

extern int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *);
extern long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
					    struct kvm_ppc_resize_hpt *rhpt);
extern long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
					   struct kvm_ppc_resize_hpt *rhpt);

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);

extern int kvm_vm_ioctl_rtas_define_token(struct kvm *kvm, void __user *argp);
extern int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu);
extern void kvmppc_rtas_tokens_free(struct kvm *kvm);
extern int kvmppc_xics_set_xive(struct kvm *kvm, u32 irq, u32 server,
				u32 priority);
extern int kvmppc_xics_get_xive(struct kvm *kvm, u32 irq, u32 *server,
				u32 *priority);
extern int kvmppc_xics_int_on(struct kvm *kvm, u32 irq);
extern int kvmppc_xics_int_off(struct kvm *kvm, u32 irq);

void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu);
void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu);

union kvmppc_one_reg {
	u32	wval;
	u64	dval;
	vector128 vval;
	u64	vsxval[2];
	struct {
		u64	addr;
		u64	length;
	}	vpaval;
};

struct kvmppc_ops {
	struct module *owner;
	int (*get_sregs)(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
	int (*set_sregs)(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
	int (*get_one_reg)(struct kvm_vcpu *vcpu, u64 id,
			   union kvmppc_one_reg *val);
	int (*set_one_reg)(struct kvm_vcpu *vcpu, u64 id,
			   union kvmppc_one_reg *val);
	void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
	void (*vcpu_put)(struct kvm_vcpu *vcpu);
	void (*set_msr)(struct kvm_vcpu *vcpu, u64 msr);
	int (*vcpu_run)(struct kvm_run *run, struct kvm_vcpu *vcpu);
	struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned int id);
	void (*vcpu_free)(struct kvm_vcpu *vcpu);
	int (*check_requests)(struct kvm_vcpu *vcpu);
	int (*get_dirty_log)(struct kvm *kvm, struct kvm_dirty_log *log);
	void (*flush_memslot)(struct kvm *kvm, struct kvm_memory_slot *memslot);
	int (*prepare_memory_region)(struct kvm *kvm,
				     struct kvm_memory_slot *memslot,
				     const struct kvm_userspace_memory_region *mem);
	void (*commit_memory_region)(struct kvm *kvm,
				     const struct kvm_userspace_memory_region *mem,
				     const struct kvm_memory_slot *old,
				     const struct kvm_memory_slot *new);
	int (*unmap_hva)(struct kvm *kvm, unsigned long hva);
	int (*unmap_hva_range)(struct kvm *kvm, unsigned long start,
			   unsigned long end);
	int (*age_hva)(struct kvm *kvm, unsigned long start, unsigned long end);
	int (*test_age_hva)(struct kvm *kvm, unsigned long hva);
	void (*set_spte_hva)(struct kvm *kvm, unsigned long hva, pte_t pte);
	void (*mmu_destroy)(struct kvm_vcpu *vcpu);
	void (*free_memslot)(struct kvm_memory_slot *free,
			     struct kvm_memory_slot *dont);
	int (*create_memslot)(struct kvm_memory_slot *slot,
			      unsigned long npages);
	int (*init_vm)(struct kvm *kvm);
	void (*destroy_vm)(struct kvm *kvm);
	int (*get_smmu_info)(struct kvm *kvm, struct kvm_ppc_smmu_info *info);
	int (*emulate_op)(struct kvm_run *run, struct kvm_vcpu *vcpu,
			  unsigned int inst, int *advance);
	int (*emulate_mtspr)(struct kvm_vcpu *vcpu, int sprn, ulong spr_val);
	int (*emulate_mfspr)(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val);
	void (*fast_vcpu_kick)(struct kvm_vcpu *vcpu);
	long (*arch_vm_ioctl)(struct file *filp, unsigned int ioctl,
			      unsigned long arg);
	int (*hcall_implemented)(unsigned long hcall);
	int (*irq_bypass_add_producer)(struct irq_bypass_consumer *,
				       struct irq_bypass_producer *);
	void (*irq_bypass_del_producer)(struct irq_bypass_consumer *,
					struct irq_bypass_producer *);
	int (*configure_mmu)(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg);
	int (*get_rmmu_info)(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
};

extern struct kvmppc_ops *kvmppc_hv_ops;
extern struct kvmppc_ops *kvmppc_pr_ops;

static inline int kvmppc_get_last_inst(struct kvm_vcpu *vcpu,
					enum instruction_type type, u32 *inst)
{
	int ret = EMULATE_DONE;
	u32 fetched_inst;

	/* Load the instruction manually if it failed to do so in the
	 * exit path */
	if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
		ret = kvmppc_load_last_inst(vcpu, type, &vcpu->arch.last_inst);

	/*  Write fetch_failed unswapped if the fetch failed */
	if (ret == EMULATE_DONE)
		fetched_inst = kvmppc_need_byteswap(vcpu) ?
				swab32(vcpu->arch.last_inst) :
				vcpu->arch.last_inst;
	else
		fetched_inst = vcpu->arch.last_inst;

	*inst = fetched_inst;
	return ret;
}

static inline bool is_kvmppc_hv_enabled(struct kvm *kvm)
{
	return kvm->arch.kvm_ops == kvmppc_hv_ops;
}

extern int kvmppc_hwrng_present(void);

/*
 * Cuts out inst bits with ordering according to spec.
 * That means the leftmost bit is zero. All given bits are included.
 */
static inline u32 kvmppc_get_field(u64 inst, int msb, int lsb)
{
	u32 r;
	u32 mask;

	BUG_ON(msb > lsb);

	mask = (1 << (lsb - msb + 1)) - 1;
	r = (inst >> (63 - lsb)) & mask;

	return r;
}

/*
 * Replaces inst bits with ordering according to spec.
 */
static inline u32 kvmppc_set_field(u64 inst, int msb, int lsb, int value)
{
	u32 r;
	u32 mask;

	BUG_ON(msb > lsb);

	mask = ((1 << (lsb - msb + 1)) - 1) << (63 - lsb);
	r = (inst & ~mask) | ((value << (63 - lsb)) & mask);

	return r;
}

#define one_reg_size(id)	\
	(1ul << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))

#define get_reg_val(id, reg)	({		\
	union kvmppc_one_reg __u;		\
	switch (one_reg_size(id)) {		\
	case 4: __u.wval = (reg); break;	\
	case 8: __u.dval = (reg); break;	\
	default: BUG();				\
	}					\
	__u;					\
})


#define set_reg_val(id, val)	({		\
	u64 __v;				\
	switch (one_reg_size(id)) {		\
	case 4: __v = (val).wval; break;	\
	case 8: __v = (val).dval; break;	\
	default: BUG();				\
	}					\
	__v;					\
})

int kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);

int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);

int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);

void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid);

struct openpic;

#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
extern void kvm_cma_reserve(void) __init;
static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
{
	paca[cpu].kvm_hstate.xics_phys = (void __iomem *)addr;
}

static inline u32 kvmppc_get_xics_latch(void)
{
	u32 xirr;

	xirr = get_paca()->kvm_hstate.saved_xirr;
	get_paca()->kvm_hstate.saved_xirr = 0;
	return xirr;
}

static inline void kvmppc_set_host_ipi(int cpu, u8 host_ipi)
{
	paca[cpu].kvm_hstate.host_ipi = host_ipi;
}

static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
{
	vcpu->kvm->arch.kvm_ops->fast_vcpu_kick(vcpu);
}

extern void kvm_hv_vm_activated(void);
extern void kvm_hv_vm_deactivated(void);
extern bool kvm_hv_mode_active(void);

#else
static inline void __init kvm_cma_reserve(void)
{}

static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
{}

static inline u32 kvmppc_get_xics_latch(void)
{
	return 0;
}

static inline void kvmppc_set_host_ipi(int cpu, u8 host_ipi)
{}

static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
{
	kvm_vcpu_kick(vcpu);
}

static inline bool kvm_hv_mode_active(void)		{ return false; }

#endif

#ifdef CONFIG_KVM_XICS
static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
{
	return vcpu->arch.irq_type == KVMPPC_IRQ_XICS;
}

static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
				struct kvm *kvm)
{
	if (kvm && kvm_irq_bypass)
		return kvm->arch.pimap;
	return NULL;
}

extern void kvmppc_alloc_host_rm_ops(void);
extern void kvmppc_free_host_rm_ops(void);
extern void kvmppc_free_pimap(struct kvm *kvm);
extern int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall);
extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu);
extern int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd);
extern u64 kvmppc_xics_get_icp(struct kvm_vcpu *vcpu);
extern int kvmppc_xics_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
extern int kvmppc_xics_connect_vcpu(struct kvm_device *dev,
			struct kvm_vcpu *vcpu, u32 cpu);
extern void kvmppc_xics_ipi_action(void);
extern void kvmppc_xics_set_mapped(struct kvm *kvm, unsigned long guest_irq,
				   unsigned long host_irq);
extern void kvmppc_xics_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
				   unsigned long host_irq);
extern long kvmppc_deliver_irq_passthru(struct kvm_vcpu *vcpu, __be32 xirr,
					struct kvmppc_irq_map *irq_map,
					struct kvmppc_passthru_irqmap *pimap,
					bool *again);
extern int h_ipi_redirect;
#else
static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
				struct kvm *kvm)
	{ return NULL; }
static inline void kvmppc_alloc_host_rm_ops(void) {};
static inline void kvmppc_free_host_rm_ops(void) {};
static inline void kvmppc_free_pimap(struct kvm *kvm) {};
static inline int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall)
	{ return 0; }
static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
	{ return 0; }
static inline void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu) { }
static inline int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd)
	{ return 0; }
#endif

/*
 * Prototypes for functions called only from assembler code.
 * Having prototypes reduces sparse errors.
 */
long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
			 unsigned long ioba, unsigned long tce);
long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
				  unsigned long liobn, unsigned long ioba,
				  unsigned long tce_list, unsigned long npages);
long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
			   unsigned long liobn, unsigned long ioba,
			   unsigned long tce_value, unsigned long npages);
long int kvmppc_rm_h_confer(struct kvm_vcpu *vcpu, int target,
                            unsigned int yield_count);
long kvmppc_h_random(struct kvm_vcpu *vcpu);
void kvmhv_commence_exit(int trap);
long kvmppc_realmode_machine_check(struct kvm_vcpu *vcpu);
void kvmppc_subcore_enter_guest(void);
void kvmppc_subcore_exit_guest(void);
long kvmppc_realmode_hmi_handler(void);
long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
                    long pte_index, unsigned long pteh, unsigned long ptel);
long kvmppc_h_remove(struct kvm_vcpu *vcpu, unsigned long flags,
                     unsigned long pte_index, unsigned long avpn);
long kvmppc_h_bulk_remove(struct kvm_vcpu *vcpu);
long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags,
                      unsigned long pte_index, unsigned long avpn,
                      unsigned long va);
long kvmppc_h_read(struct kvm_vcpu *vcpu, unsigned long flags,
                   unsigned long pte_index);
long kvmppc_h_clear_ref(struct kvm_vcpu *vcpu, unsigned long flags,
                        unsigned long pte_index);
long kvmppc_h_clear_mod(struct kvm_vcpu *vcpu, unsigned long flags,
                        unsigned long pte_index);
long kvmppc_hpte_hv_fault(struct kvm_vcpu *vcpu, unsigned long addr,
                          unsigned long slb_v, unsigned int status, bool data);
unsigned long kvmppc_rm_h_xirr(struct kvm_vcpu *vcpu);
int kvmppc_rm_h_ipi(struct kvm_vcpu *vcpu, unsigned long server,
                    unsigned long mfrr);
int kvmppc_rm_h_cppr(struct kvm_vcpu *vcpu, unsigned long cppr);
int kvmppc_rm_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr);

/*
 * Host-side operations we want to set up while running in real
 * mode in the guest operating on the xics.
 * Currently only VCPU wakeup is supported.
 */

union kvmppc_rm_state {
	unsigned long raw;
	struct {
		u32 in_host;
		u32 rm_action;
	};
};

struct kvmppc_host_rm_core {
	union kvmppc_rm_state rm_state;
	void *rm_data;
	char pad[112];
};

struct kvmppc_host_rm_ops {
	struct kvmppc_host_rm_core	*rm_core;
	void		(*vcpu_kick)(struct kvm_vcpu *vcpu);
};

extern struct kvmppc_host_rm_ops *kvmppc_host_rm_ops_hv;

static inline unsigned long kvmppc_get_epr(struct kvm_vcpu *vcpu)
{
#ifdef CONFIG_KVM_BOOKE_HV
	return mfspr(SPRN_GEPR);
#elif defined(CONFIG_BOOKE)
	return vcpu->arch.epr;
#else
	return 0;
#endif
}

static inline void kvmppc_set_epr(struct kvm_vcpu *vcpu, u32 epr)
{
#ifdef CONFIG_KVM_BOOKE_HV
	mtspr(SPRN_GEPR, epr);
#elif defined(CONFIG_BOOKE)
	vcpu->arch.epr = epr;
#endif
}

#ifdef CONFIG_KVM_MPIC

void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu);
int kvmppc_mpic_connect_vcpu(struct kvm_device *dev, struct kvm_vcpu *vcpu,
			     u32 cpu);
void kvmppc_mpic_disconnect_vcpu(struct openpic *opp, struct kvm_vcpu *vcpu);

#else

static inline void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu)
{
}

static inline int kvmppc_mpic_connect_vcpu(struct kvm_device *dev,
		struct kvm_vcpu *vcpu, u32 cpu)
{
	return -EINVAL;
}

static inline void kvmppc_mpic_disconnect_vcpu(struct openpic *opp,
		struct kvm_vcpu *vcpu)
{
}

#endif /* CONFIG_KVM_MPIC */

int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
			      struct kvm_config_tlb *cfg);
int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
			     struct kvm_dirty_tlb *cfg);

long kvmppc_alloc_lpid(void);
void kvmppc_claim_lpid(long lpid);
void kvmppc_free_lpid(long lpid);
void kvmppc_init_lpid(unsigned long nr_lpids);

static inline void kvmppc_mmu_flush_icache(kvm_pfn_t pfn)
{
	struct page *page;
	/*
	 * We can only access pages that the kernel maps
	 * as memory. Bail out for unmapped ones.
	 */
	if (!pfn_valid(pfn))
		return;

	/* Clear i-cache for new pages */
	page = pfn_to_page(pfn);
	if (!test_bit(PG_arch_1, &page->flags)) {
		flush_dcache_icache_page(page);
		set_bit(PG_arch_1, &page->flags);
	}
}

/*
 * Shared struct helpers. The shared struct can be little or big endian,
 * depending on the guest endianness. So expose helpers to all of them.
 */
static inline bool kvmppc_shared_big_endian(struct kvm_vcpu *vcpu)
{
#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
	/* Only Book3S_64 PR supports bi-endian for now */
	return vcpu->arch.shared_big_endian;
#elif defined(CONFIG_PPC_BOOK3S_64) && defined(__LITTLE_ENDIAN__)
	/* Book3s_64 HV on little endian is always little endian */
	return false;
#else
	return true;
#endif
}

#define SPRNG_WRAPPER_GET(reg, bookehv_spr)				\
static inline ulong kvmppc_get_##reg(struct kvm_vcpu *vcpu)		\
{									\
	return mfspr(bookehv_spr);					\
}									\

#define SPRNG_WRAPPER_SET(reg, bookehv_spr)				\
static inline void kvmppc_set_##reg(struct kvm_vcpu *vcpu, ulong val)	\
{									\
	mtspr(bookehv_spr, val);						\
}									\

#define SHARED_WRAPPER_GET(reg, size)					\
static inline u##size kvmppc_get_##reg(struct kvm_vcpu *vcpu)		\
{									\
	if (kvmppc_shared_big_endian(vcpu))				\
	       return be##size##_to_cpu(vcpu->arch.shared->reg);	\
	else								\
	       return le##size##_to_cpu(vcpu->arch.shared->reg);	\
}									\

#define SHARED_WRAPPER_SET(reg, size)					\
static inline void kvmppc_set_##reg(struct kvm_vcpu *vcpu, u##size val)	\
{									\
	if (kvmppc_shared_big_endian(vcpu))				\
	       vcpu->arch.shared->reg = cpu_to_be##size(val);		\
	else								\
	       vcpu->arch.shared->reg = cpu_to_le##size(val);		\
}									\

#define SHARED_WRAPPER(reg, size)					\
	SHARED_WRAPPER_GET(reg, size)					\
	SHARED_WRAPPER_SET(reg, size)					\

#define SPRNG_WRAPPER(reg, bookehv_spr)					\
	SPRNG_WRAPPER_GET(reg, bookehv_spr)				\
	SPRNG_WRAPPER_SET(reg, bookehv_spr)				\

#ifdef CONFIG_KVM_BOOKE_HV

#define SHARED_SPRNG_WRAPPER(reg, size, bookehv_spr)			\
	SPRNG_WRAPPER(reg, bookehv_spr)					\

#else

#define SHARED_SPRNG_WRAPPER(reg, size, bookehv_spr)			\
	SHARED_WRAPPER(reg, size)					\

#endif

SHARED_WRAPPER(critical, 64)
SHARED_SPRNG_WRAPPER(sprg0, 64, SPRN_GSPRG0)
SHARED_SPRNG_WRAPPER(sprg1, 64, SPRN_GSPRG1)
SHARED_SPRNG_WRAPPER(sprg2, 64, SPRN_GSPRG2)
SHARED_SPRNG_WRAPPER(sprg3, 64, SPRN_GSPRG3)
SHARED_SPRNG_WRAPPER(srr0, 64, SPRN_GSRR0)
SHARED_SPRNG_WRAPPER(srr1, 64, SPRN_GSRR1)
SHARED_SPRNG_WRAPPER(dar, 64, SPRN_GDEAR)
SHARED_SPRNG_WRAPPER(esr, 64, SPRN_GESR)
SHARED_WRAPPER_GET(msr, 64)
static inline void kvmppc_set_msr_fast(struct kvm_vcpu *vcpu, u64 val)
{
	if (kvmppc_shared_big_endian(vcpu))
	       vcpu->arch.shared->msr = cpu_to_be64(val);
	else
	       vcpu->arch.shared->msr = cpu_to_le64(val);
}
SHARED_WRAPPER(dsisr, 32)
SHARED_WRAPPER(int_pending, 32)
SHARED_WRAPPER(sprg4, 64)
SHARED_WRAPPER(sprg5, 64)
SHARED_WRAPPER(sprg6, 64)
SHARED_WRAPPER(sprg7, 64)

static inline u32 kvmppc_get_sr(struct kvm_vcpu *vcpu, int nr)
{
	if (kvmppc_shared_big_endian(vcpu))
	       return be32_to_cpu(vcpu->arch.shared->sr[nr]);
	else
	       return le32_to_cpu(vcpu->arch.shared->sr[nr]);
}

static inline void kvmppc_set_sr(struct kvm_vcpu *vcpu, int nr, u32 val)
{
	if (kvmppc_shared_big_endian(vcpu))
	       vcpu->arch.shared->sr[nr] = cpu_to_be32(val);
	else
	       vcpu->arch.shared->sr[nr] = cpu_to_le32(val);
}

/*
 * Please call after prepare_to_enter. This function puts the lazy ee and irq
 * disabled tracking state back to normal mode, without actually enabling
 * interrupts.
 */
static inline void kvmppc_fix_ee_before_entry(void)
{
	trace_hardirqs_on();

#ifdef CONFIG_PPC64
	/*
	 * To avoid races, the caller must have gone directly from having
	 * interrupts fully-enabled to hard-disabled.
	 */
	WARN_ON(local_paca->irq_happened != PACA_IRQ_HARD_DIS);

	/* Only need to enable IRQs by hard enabling them after this */
	local_paca->irq_happened = 0;
	local_paca->soft_enabled = 1;
#endif
}

static inline ulong kvmppc_get_ea_indexed(struct kvm_vcpu *vcpu, int ra, int rb)
{
	ulong ea;
	ulong msr_64bit = 0;

	ea = kvmppc_get_gpr(vcpu, rb);
	if (ra)
		ea += kvmppc_get_gpr(vcpu, ra);

#if defined(CONFIG_PPC_BOOK3E_64)
	msr_64bit = MSR_CM;
#elif defined(CONFIG_PPC_BOOK3S_64)
	msr_64bit = MSR_SF;
#endif

	if (!(kvmppc_get_msr(vcpu) & msr_64bit))
		ea = (uint32_t)ea;

	return ea;
}

extern void xics_wake_cpu(int cpu);

#endif /* __POWERPC_KVM_PPC_H__ */