kvm_host.h 34.8 KB
Newer Older
1 2
#ifndef __KVM_HOST_H
#define __KVM_HOST_H
A
Avi Kivity 已提交
3 4 5 6 7 8 9

/*
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 */

#include <linux/types.h>
10
#include <linux/hardirq.h>
A
Avi Kivity 已提交
11 12 13
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
M
Markus Rechberger 已提交
14 15
#include <linux/signal.h>
#include <linux/sched.h>
16
#include <linux/bug.h>
A
Avi Kivity 已提交
17
#include <linux/mm.h>
18
#include <linux/mmu_notifier.h>
19
#include <linux/preempt.h>
20
#include <linux/msi.h>
21
#include <linux/slab.h>
22
#include <linux/rcupdate.h>
23
#include <linux/ratelimit.h>
X
Xiao Guangrong 已提交
24
#include <linux/err.h>
25
#include <linux/irqflags.h>
26
#include <linux/context_tracking.h>
27
#include <linux/irqbypass.h>
28
#include <linux/swait.h>
29
#include <linux/refcount.h>
A
Alexey Dobriyan 已提交
30
#include <asm/signal.h>
A
Avi Kivity 已提交
31 32

#include <linux/kvm.h>
I
Ingo Molnar 已提交
33
#include <linux/kvm_para.h>
A
Avi Kivity 已提交
34

35
#include <linux/kvm_types.h>
36

37
#include <asm/kvm_host.h>
38

G
Greg Kurz 已提交
39 40 41 42
#ifndef KVM_MAX_VCPU_ID
#define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
#endif

43 44 45 46 47 48 49
/*
 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
 * in kvm, other bits are visible for userspace which are defined in
 * include/linux/kvm_h.
 */
#define KVM_MEMSLOT_INVALID	(1UL << 16)

50 51
/* Two fragments for cross MMIO pages. */
#define KVM_MAX_MMIO_FRAGMENTS	2
A
Avi Kivity 已提交
52

53 54 55 56
#ifndef KVM_ADDRESS_SPACE_NUM
#define KVM_ADDRESS_SPACE_NUM	1
#endif

57 58
/*
 * For the normal pfn, the highest 12 bits should be zero,
59 60
 * so we can mask bit 62 ~ bit 52  to indicate the error pfn,
 * mask bit 63 to indicate the noslot pfn.
61
 */
62 63 64
#define KVM_PFN_ERR_MASK	(0x7ffULL << 52)
#define KVM_PFN_ERR_NOSLOT_MASK	(0xfffULL << 52)
#define KVM_PFN_NOSLOT		(0x1ULL << 63)
65 66 67

#define KVM_PFN_ERR_FAULT	(KVM_PFN_ERR_MASK)
#define KVM_PFN_ERR_HWPOISON	(KVM_PFN_ERR_MASK + 1)
68
#define KVM_PFN_ERR_RO_FAULT	(KVM_PFN_ERR_MASK + 2)
69

70 71 72 73
/*
 * error pfns indicate that the gfn is in slot but faild to
 * translate it to pfn on host.
 */
D
Dan Williams 已提交
74
static inline bool is_error_pfn(kvm_pfn_t pfn)
X
Xiao Guangrong 已提交
75
{
76
	return !!(pfn & KVM_PFN_ERR_MASK);
X
Xiao Guangrong 已提交
77 78
}

79 80 81 82 83
/*
 * error_noslot pfns indicate that the gfn can not be
 * translated to pfn - it is not in slot or failed to
 * translate it to pfn.
 */
D
Dan Williams 已提交
84
static inline bool is_error_noslot_pfn(kvm_pfn_t pfn)
X
Xiao Guangrong 已提交
85
{
86
	return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
X
Xiao Guangrong 已提交
87 88
}

89
/* noslot pfn indicates that the gfn is not in slot. */
D
Dan Williams 已提交
90
static inline bool is_noslot_pfn(kvm_pfn_t pfn)
X
Xiao Guangrong 已提交
91
{
92
	return pfn == KVM_PFN_NOSLOT;
X
Xiao Guangrong 已提交
93 94
}

95 96 97 98 99 100
/*
 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
 * provide own defines and kvm_is_error_hva
 */
#ifndef KVM_HVA_ERR_BAD

101 102
#define KVM_HVA_ERR_BAD		(PAGE_OFFSET)
#define KVM_HVA_ERR_RO_BAD	(PAGE_OFFSET + PAGE_SIZE)
X
Xiao Guangrong 已提交
103 104 105

static inline bool kvm_is_error_hva(unsigned long addr)
{
106
	return addr >= PAGE_OFFSET;
X
Xiao Guangrong 已提交
107 108
}

109 110
#endif

111 112
#define KVM_ERR_PTR_BAD_PAGE	(ERR_PTR(-ENOENT))

113
static inline bool is_error_page(struct page *page)
114 115 116 117
{
	return IS_ERR(page);
}

118 119
#define KVM_REQUEST_MASK           GENMASK(7,0)
#define KVM_REQUEST_NO_WAKEUP      BIT(8)
120
#define KVM_REQUEST_WAIT           BIT(9)
121
/*
122 123
 * Architecture-independent vcpu->requests bit members
 * Bits 4-7 are reserved for more arch-independent bits.
124
 */
125 126 127 128
#define KVM_REQ_TLB_FLUSH         (0 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
#define KVM_REQ_MMU_RELOAD        (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
#define KVM_REQ_PENDING_TIMER     2
#define KVM_REQ_UNHALT            3
129 130 131 132 133 134 135
#define KVM_REQUEST_ARCH_BASE     8

#define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \
	BUILD_BUG_ON((unsigned)(nr) >= 32 - KVM_REQUEST_ARCH_BASE); \
	(unsigned)(((nr) + KVM_REQUEST_ARCH_BASE) | (flags)); \
})
#define KVM_ARCH_REQ(nr)           KVM_ARCH_REQ_FLAGS(nr, 0)
136

137 138
#define KVM_USERSPACE_IRQ_SOURCE_ID		0
#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID	1
139

140
extern struct kmem_cache *kvm_vcpu_cache;
A
Avi Kivity 已提交
141

142
extern spinlock_t kvm_lock;
143 144
extern struct list_head vm_list;

145 146 147 148 149 150
struct kvm_io_range {
	gpa_t addr;
	int len;
	struct kvm_io_device *dev;
};

151
#define NR_IOBUS_DEVS 1000
152

153
struct kvm_io_bus {
154 155
	int dev_count;
	int ioeventfd_count;
156
	struct kvm_io_range range[];
157 158
};

M
Marcelo Tosatti 已提交
159 160 161
enum kvm_bus {
	KVM_MMIO_BUS,
	KVM_PIO_BUS,
162
	KVM_VIRTIO_CCW_NOTIFY_BUS,
163
	KVM_FAST_MMIO_BUS,
M
Marcelo Tosatti 已提交
164 165 166
	KVM_NR_BUSES
};

167
int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
M
Marcelo Tosatti 已提交
168
		     int len, const void *val);
169 170 171 172
int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
			    gpa_t addr, int len, const void *val, long cookie);
int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
		    int len, void *val);
173 174
int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
			    int len, struct kvm_io_device *dev);
175 176
void kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
			       struct kvm_io_device *dev);
177 178
struct kvm_io_device *kvm_io_bus_get_dev(struct kvm *kvm, enum kvm_bus bus_idx,
					 gpa_t addr);
179

180 181 182 183 184 185 186 187 188 189
#ifdef CONFIG_KVM_ASYNC_PF
struct kvm_async_pf {
	struct work_struct work;
	struct list_head link;
	struct list_head queue;
	struct kvm_vcpu *vcpu;
	struct mm_struct *mm;
	gva_t gva;
	unsigned long addr;
	struct kvm_arch_async_pf arch;
190
	bool   wakeup_all;
191 192 193 194
};

void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
195
int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
196
		       struct kvm_arch_async_pf *arch);
197
int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
198 199
#endif

200 201 202
enum {
	OUTSIDE_GUEST_MODE,
	IN_GUEST_MODE,
203 204
	EXITING_GUEST_MODE,
	READING_SHADOW_PAGE_TABLES,
205 206
};

A
Avi Kivity 已提交
207 208 209 210 211 212 213 214 215 216
/*
 * Sometimes a large or cross-page mmio needs to be broken up into separate
 * exits for userspace servicing.
 */
struct kvm_mmio_fragment {
	gpa_t gpa;
	void *data;
	unsigned len;
};

217 218
struct kvm_vcpu {
	struct kvm *kvm;
219
#ifdef CONFIG_PREEMPT_NOTIFIERS
220
	struct preempt_notifier preempt_notifier;
221
#endif
222
	int cpu;
223
	int vcpu_id;
224 225
	int srcu_idx;
	int mode;
226
	unsigned long requests;
J
Jan Kiszka 已提交
227
	unsigned long guest_debug;
228

229 230 231
	int pre_pcpu;
	struct list_head blocked_vcpu_list;

232 233
	struct mutex mutex;
	struct kvm_run *run;
234

235
	int guest_fpu_loaded, guest_xcr0_loaded;
236
	struct swait_queue_head wq;
237
	struct pid __rcu *pid;
238 239 240
	int sigset_active;
	sigset_t sigset;
	struct kvm_vcpu_stat stat;
W
Wanpeng Li 已提交
241
	unsigned int halt_poll_ns;
242
	bool valid_wakeup;
243

244
#ifdef CONFIG_HAS_IOMEM
245 246 247
	int mmio_needed;
	int mmio_read_completed;
	int mmio_is_write;
A
Avi Kivity 已提交
248 249 250
	int mmio_cur_fragment;
	int mmio_nr_fragments;
	struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
251
#endif
A
Avi Kivity 已提交
252

253 254 255 256 257 258 259 260 261
#ifdef CONFIG_KVM_ASYNC_PF
	struct {
		u32 queued;
		struct list_head queue;
		struct list_head done;
		spinlock_t lock;
	} async_pf;
#endif

262 263 264 265 266 267 268 269 270 271 272 273
#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
	/*
	 * Cpu relax intercept or pause loop exit optimization
	 * in_spin_loop: set when a vcpu does a pause loop exit
	 *  or cpu relax intercepted.
	 * dy_eligible: indicates whether vcpu is eligible for directed yield.
	 */
	struct {
		bool in_spin_loop;
		bool dy_eligible;
	} spin_loop;
#endif
274
	bool preempted;
275
	struct kvm_vcpu_arch arch;
276
	struct dentry *debugfs_dentry;
277 278
};

279 280
static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
{
281 282 283 284 285 286
	/*
	 * The memory barrier ensures a previous write to vcpu->requests cannot
	 * be reordered with the read of vcpu->mode.  It pairs with the general
	 * memory barrier following the write of vcpu->mode in VCPU RUN.
	 */
	smp_mb__before_atomic();
287 288 289
	return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
}

290 291 292 293 294 295
/*
 * Some of the bitops functions do not support too long bitmaps.
 * This number must be determined not to exceed such limits.
 */
#define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)

A
Avi Kivity 已提交
296 297 298 299
struct kvm_memory_slot {
	gfn_t base_gfn;
	unsigned long npages;
	unsigned long *dirty_bitmap;
300
	struct kvm_arch_memory_slot arch;
301
	unsigned long userspace_addr;
302
	u32 flags;
303
	short id;
A
Avi Kivity 已提交
304 305
};

306 307 308 309 310
static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
{
	return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
}

311 312 313 314 315 316 317 318
struct kvm_s390_adapter_int {
	u64 ind_addr;
	u64 summary_addr;
	u64 ind_offset;
	u32 summary_offset;
	u32 adapter_id;
};

319 320 321 322 323
struct kvm_hv_sint {
	u32 vcpu;
	u32 sint;
};

324 325
struct kvm_kernel_irq_routing_entry {
	u32 gsi;
326
	u32 type;
327
	int (*set)(struct kvm_kernel_irq_routing_entry *e,
328 329
		   struct kvm *kvm, int irq_source_id, int level,
		   bool line_status);
330 331 332 333 334
	union {
		struct {
			unsigned irqchip;
			unsigned pin;
		} irqchip;
335 336 337 338 339 340 341
		struct {
			u32 address_lo;
			u32 address_hi;
			u32 data;
			u32 flags;
			u32 devid;
		} msi;
342
		struct kvm_s390_adapter_int adapter;
343
		struct kvm_hv_sint hv_sint;
344
	};
345 346 347
	struct hlist_node link;
};

348 349 350 351 352 353 354 355 356 357 358 359
#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
struct kvm_irq_routing_table {
	int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
	u32 nr_rt_entries;
	/*
	 * Array indexed by gsi. Each entry contains list of irq chips
	 * the gsi is connected to.
	 */
	struct hlist_head map[0];
};
#endif

360 361 362 363
#ifndef KVM_PRIVATE_MEM_SLOTS
#define KVM_PRIVATE_MEM_SLOTS 0
#endif

364
#ifndef KVM_MEM_SLOTS_NUM
365
#define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
366 367
#endif

368 369 370 371 372 373 374
#ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
{
	return 0;
}
#endif

375 376 377 378 379
/*
 * Note:
 * memslots are not sorted by id anymore, please use id_to_memslot()
 * to get the memslot by its id.
 */
380
struct kvm_memslots {
381
	u64 generation;
382
	struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
383
	/* The mapping table from slot id to the index in memslots[]. */
384
	short id_to_index[KVM_MEM_SLOTS_NUM];
385
	atomic_t lru_slot;
386
	int used_slots;
387 388
};

A
Avi Kivity 已提交
389
struct kvm {
390
	spinlock_t mmu_lock;
391
	struct mutex slots_lock;
392
	struct mm_struct *mm; /* userspace tied to this vm */
393
	struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
R
Rusty Russell 已提交
394
	struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
395 396 397 398 399 400 401

	/*
	 * created_vcpus is protected by kvm->lock, and is incremented
	 * at the beginning of KVM_CREATE_VCPU.  online_vcpus is only
	 * incremented after storing the kvm_vcpu pointer in vcpus,
	 * and is accessed atomically.
	 */
402
	atomic_t online_vcpus;
403
	int created_vcpus;
404
	int last_boosted_vcpu;
405
	struct list_head vm_list;
406
	struct mutex lock;
M
Marcelo Tosatti 已提交
407
	struct kvm_io_bus *buses[KVM_NR_BUSES];
G
Gregory Haskins 已提交
408 409 410 411
#ifdef CONFIG_HAVE_KVM_EVENTFD
	struct {
		spinlock_t        lock;
		struct list_head  items;
412 413
		struct list_head  resampler_list;
		struct mutex      resampler_lock;
G
Gregory Haskins 已提交
414
	} irqfds;
G
Gregory Haskins 已提交
415
	struct list_head ioeventfds;
G
Gregory Haskins 已提交
416
#endif
417
	struct kvm_vm_stat stat;
418
	struct kvm_arch arch;
419
	refcount_t users_count;
420
#ifdef CONFIG_KVM_MMIO
421
	struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
422 423
	spinlock_t ring_lock;
	struct list_head coalesced_zones;
424
#endif
425

426
	struct mutex irq_lock;
427
#ifdef CONFIG_HAVE_KVM_IRQCHIP
428
	/*
429
	 * Update side is protected by irq_lock.
430
	 */
A
Arnd Bergmann 已提交
431
	struct kvm_irq_routing_table __rcu *irq_routing;
432 433
#endif
#ifdef CONFIG_HAVE_KVM_IRQFD
434
	struct hlist_head irq_ack_notifier_list;
435 436
#endif

437
#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
438 439 440 441
	struct mmu_notifier mmu_notifier;
	unsigned long mmu_notifier_seq;
	long mmu_notifier_count;
#endif
442
	long tlbs_dirty;
443
	struct list_head devices;
444 445
	struct dentry *debugfs_dentry;
	struct kvm_stat_data **debugfs_stat_data;
446 447
	struct srcu_struct srcu;
	struct srcu_struct irq_srcu;
A
Avi Kivity 已提交
448 449
};

450 451 452 453 454 455
#define kvm_err(fmt, ...) \
	pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
#define kvm_info(fmt, ...) \
	pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
#define kvm_debug(fmt, ...) \
	pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
456 457 458
#define kvm_debug_ratelimited(fmt, ...) \
	pr_debug_ratelimited("kvm [%i]: " fmt, task_pid_nr(current), \
			     ## __VA_ARGS__)
459 460 461
#define kvm_pr_unimpl(fmt, ...) \
	pr_err_ratelimited("kvm [%i]: " fmt, \
			   task_tgid_nr(current), ## __VA_ARGS__)
462

463 464
/* The guest did something we don't support. */
#define vcpu_unimpl(vcpu, fmt, ...)					\
465 466
	kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt,			\
			(vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
A
Avi Kivity 已提交
467

468 469
#define vcpu_debug(vcpu, fmt, ...)					\
	kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
470 471 472
#define vcpu_debug_ratelimited(vcpu, fmt, ...)				\
	kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id,           \
			      ## __VA_ARGS__)
473 474
#define vcpu_err(vcpu, fmt, ...)					\
	kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
475

476 477
static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
{
478 479 480 481
	/* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu, in case
	 * the caller has read kvm->online_vcpus before (as is the case
	 * for kvm_for_each_vcpu, for example).
	 */
482 483 484 485 486
	smp_rmb();
	return kvm->vcpus[i];
}

#define kvm_for_each_vcpu(idx, vcpup, kvm) \
487 488 489 490
	for (idx = 0; \
	     idx < atomic_read(&kvm->online_vcpus) && \
	     (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
	     idx++)
491

492 493
static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
{
494
	struct kvm_vcpu *vcpu = NULL;
495 496
	int i;

497
	if (id < 0)
498
		return NULL;
499 500
	if (id < KVM_MAX_VCPUS)
		vcpu = kvm_get_vcpu(kvm, id);
501 502
	if (vcpu && vcpu->vcpu_id == id)
		return vcpu;
503 504 505 506 507 508
	kvm_for_each_vcpu(i, vcpu, kvm)
		if (vcpu->vcpu_id == id)
			return vcpu;
	return NULL;
}

509 510 511 512 513 514 515 516 517 518 519
static inline int kvm_vcpu_get_idx(struct kvm_vcpu *vcpu)
{
	struct kvm_vcpu *tmp;
	int idx;

	kvm_for_each_vcpu(idx, tmp, vcpu->kvm)
		if (tmp == vcpu)
			return idx;
	BUG();
}

520 521
#define kvm_for_each_memslot(memslot, slots)	\
	for (memslot = &slots->memslots[0];	\
522 523
	      memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
		memslot++)
524

R
Rusty Russell 已提交
525 526 527
int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);

528
int __must_check vcpu_load(struct kvm_vcpu *vcpu);
529 530
void vcpu_put(struct kvm_vcpu *vcpu);

531
#ifdef __KVM_HAVE_IOAPIC
532
void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm);
533
void kvm_arch_post_irq_routing_update(struct kvm *kvm);
534
#else
535
static inline void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm)
536 537
{
}
538
static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
539 540
{
}
541 542
#endif

543
#ifdef CONFIG_HAVE_KVM_IRQFD
544 545 546 547 548 549 550 551 552 553 554 555
int kvm_irqfd_init(void);
void kvm_irqfd_exit(void);
#else
static inline int kvm_irqfd_init(void)
{
	return 0;
}

static inline void kvm_irqfd_exit(void)
{
}
#endif
556
int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
557
		  struct module *module);
558
void kvm_exit(void);
A
Avi Kivity 已提交
559

I
Izik Eidus 已提交
560 561 562
void kvm_get_kvm(struct kvm *kvm);
void kvm_put_kvm(struct kvm *kvm);

563
static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
564
{
565
	return rcu_dereference_check(kvm->memslots[as_id],
566 567 568 569
			srcu_read_lock_held(&kvm->srcu)
			|| lockdep_is_held(&kvm->slots_lock));
}

570 571 572 573 574
static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
{
	return __kvm_memslots(kvm, 0);
}

575 576
static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
{
577 578 579
	int as_id = kvm_arch_vcpu_memslots_id(vcpu);

	return __kvm_memslots(vcpu->kvm, as_id);
580 581
}

582 583 584
static inline struct kvm_memory_slot *
id_to_memslot(struct kvm_memslots *slots, int id)
{
585 586
	int index = slots->id_to_index[id];
	struct kvm_memory_slot *slot;
587

588
	slot = &slots->memslots[index];
589

590 591
	WARN_ON(slot->id != id);
	return slot;
592 593
}

594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611
/*
 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
 * - create a new memory slot
 * - delete an existing memory slot
 * - modify an existing memory slot
 *   -- move it in the guest physical memory space
 *   -- just change its flags
 *
 * Since flags can be changed by some of these operations, the following
 * differentiation is the best we can do for __kvm_set_memory_region():
 */
enum kvm_mr_change {
	KVM_MR_CREATE,
	KVM_MR_DELETE,
	KVM_MR_MOVE,
	KVM_MR_FLAGS_ONLY,
};

612
int kvm_set_memory_region(struct kvm *kvm,
613
			  const struct kvm_userspace_memory_region *mem);
614
int __kvm_set_memory_region(struct kvm *kvm,
615
			    const struct kvm_userspace_memory_region *mem);
616
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
617
			   struct kvm_memory_slot *dont);
618 619
int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
			    unsigned long npages);
620
void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
621 622
int kvm_arch_prepare_memory_region(struct kvm *kvm,
				struct kvm_memory_slot *memslot,
623
				const struct kvm_userspace_memory_region *mem,
624
				enum kvm_mr_change change);
625
void kvm_arch_commit_memory_region(struct kvm *kvm,
626
				const struct kvm_userspace_memory_region *mem,
627
				const struct kvm_memory_slot *old,
628
				const struct kvm_memory_slot *new,
629
				enum kvm_mr_change change);
630
bool kvm_largepages_enabled(void);
631
void kvm_disable_largepages(void);
632 633 634 635 636
/* flush all memory translations */
void kvm_arch_flush_shadow_all(struct kvm *kvm);
/* flush memory translations pointing to 'slot' */
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
				   struct kvm_memory_slot *slot);
637

638 639
int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
			    struct page **pages, int nr_pages);
640

A
Avi Kivity 已提交
641
struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
M
Marcelo Tosatti 已提交
642
unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
643
unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
X
Xiao Guangrong 已提交
644
unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
645 646
unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
				      bool *writable);
647 648
void kvm_release_page_clean(struct page *page);
void kvm_release_page_dirty(struct page *page);
649 650
void kvm_set_page_accessed(struct page *page);

D
Dan Williams 已提交
651 652 653
kvm_pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
654
		      bool *writable);
D
Dan Williams 已提交
655 656 657 658 659
kvm_pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
kvm_pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn,
			       bool atomic, bool *async, bool write_fault,
			       bool *writable);
660

D
Dan Williams 已提交
661 662 663 664
void kvm_release_pfn_clean(kvm_pfn_t pfn);
void kvm_set_pfn_dirty(kvm_pfn_t pfn);
void kvm_set_pfn_accessed(kvm_pfn_t pfn);
void kvm_get_pfn(kvm_pfn_t pfn);
665

666 667
int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
			int len);
668 669
int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
			  unsigned long len);
670
int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
671 672
int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
			   void *data, unsigned long len);
673 674 675 676
int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
			 int offset, int len);
int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
		    unsigned long len);
677 678 679 680 681 682
int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
			   void *data, unsigned long len);
int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
			   void *data, int offset, unsigned long len);
int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
			      gpa_t gpa, unsigned long len);
683 684
int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
A
Avi Kivity 已提交
685
struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
686
bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
J
Joerg Roedel 已提交
687
unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
A
Avi Kivity 已提交
688 689
void mark_page_dirty(struct kvm *kvm, gfn_t gfn);

690 691
struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
D
Dan Williams 已提交
692 693
kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
694 695 696 697 698 699 700 701 702 703 704 705 706 707 708
struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
			     int len);
int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
			       unsigned long len);
int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
			unsigned long len);
int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
			      int offset, int len);
int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
			 unsigned long len);
void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);

709
void kvm_vcpu_block(struct kvm_vcpu *vcpu);
710 711
void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
712
bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu);
713
void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
714
int kvm_vcpu_yield_to(struct kvm_vcpu *target);
Z
Zhai, Edwin 已提交
715
void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
716 717
void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
718

719
void kvm_flush_remote_tlbs(struct kvm *kvm);
720
void kvm_reload_remote_mmus(struct kvm *kvm);
721
bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
A
Avi Kivity 已提交
722

723 724
long kvm_arch_dev_ioctl(struct file *filp,
			unsigned int ioctl, unsigned long arg);
725 726
long kvm_arch_vcpu_ioctl(struct file *filp,
			 unsigned int ioctl, unsigned long arg);
727
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
728

729
int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
730

731 732
int kvm_get_dirty_log(struct kvm *kvm,
			struct kvm_dirty_log *log, int *is_dirty);
733 734 735 736

int kvm_get_dirty_log_protect(struct kvm *kvm,
			struct kvm_dirty_log *log, bool *is_dirty);

737
void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
738 739 740 741
					struct kvm_memory_slot *slot,
					gfn_t gfn_offset,
					unsigned long mask);

742 743 744
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
				struct kvm_dirty_log *log);

745 746
int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
			bool line_status);
747 748
long kvm_arch_vm_ioctl(struct file *filp,
		       unsigned int ioctl, unsigned long arg);
749

750 751 752
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);

753 754 755
int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
				    struct kvm_translation *tr);

756 757 758 759 760 761
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
				  struct kvm_sregs *sregs);
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
				  struct kvm_sregs *sregs);
762 763 764 765
int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
				    struct kvm_mp_state *mp_state);
int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
				    struct kvm_mp_state *mp_state);
J
Jan Kiszka 已提交
766 767
int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
					struct kvm_guest_debug *dbg);
768 769
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);

770 771
int kvm_arch_init(void *opaque);
void kvm_arch_exit(void);
772

773 774 775
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);

R
Radim Krčmář 已提交
776 777
void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);

778 779 780 781
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
782
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
783
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
784
void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
785

786 787 788
bool kvm_arch_has_vcpu_debugfs(void);
int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu);

789 790
int kvm_arch_hardware_enable(void);
void kvm_arch_hardware_disable(void);
791 792 793
int kvm_arch_hardware_setup(void);
void kvm_arch_hardware_unsetup(void);
void kvm_arch_check_processor_compat(void *rtn);
794
int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
795
int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
796

797 798 799 800 801 802 803 804 805 806 807 808
#ifndef __KVM_HAVE_ARCH_VM_ALLOC
static inline struct kvm *kvm_arch_alloc_vm(void)
{
	return kzalloc(sizeof(struct kvm), GFP_KERNEL);
}

static inline void kvm_arch_free_vm(struct kvm *kvm)
{
	kfree(kvm);
}
#endif

809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826
#ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
#else
static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
{
}

static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
{
}

static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
{
	return false;
}
#endif
827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844
#ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
void kvm_arch_start_assignment(struct kvm *kvm);
void kvm_arch_end_assignment(struct kvm *kvm);
bool kvm_arch_has_assigned_device(struct kvm *kvm);
#else
static inline void kvm_arch_start_assignment(struct kvm *kvm)
{
}

static inline void kvm_arch_end_assignment(struct kvm *kvm)
{
}

static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
{
	return false;
}
#endif
845

846
static inline struct swait_queue_head *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
847
{
848 849 850
#ifdef __KVM_HAVE_ARCH_WQP
	return vcpu->arch.wqp;
#else
851 852
	return &vcpu->wq;
#endif
853
}
854

855 856 857 858 859 860 861 862 863 864 865 866 867 868
#ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
/*
 * returns true if the virtual interrupt controller is initialized and
 * ready to accept virtual IRQ. On some architectures the virtual interrupt
 * controller is dynamically instantiated and this is not always true.
 */
bool kvm_arch_intc_initialized(struct kvm *kvm);
#else
static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
{
	return true;
}
#endif

869
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
870
void kvm_arch_destroy_vm(struct kvm *kvm);
871
void kvm_arch_sync_events(struct kvm *kvm);
872

873
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
874
void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
875

D
Dan Williams 已提交
876
bool kvm_is_reserved_pfn(kvm_pfn_t pfn);
877

B
Ben-Ami Yassour 已提交
878 879 880 881 882 883
struct kvm_irq_ack_notifier {
	struct hlist_node link;
	unsigned gsi;
	void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
};

884 885 886
int kvm_irq_map_gsi(struct kvm *kvm,
		    struct kvm_kernel_irq_routing_entry *entries, int gsi);
int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
887

888 889
int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
		bool line_status);
890
int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
891
		int irq_source_id, int level, bool line_status);
892 893 894
int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
			       struct kvm *kvm, int irq_source_id,
			       int level, bool line_status);
895
bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
896
void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
897
void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
898 899
void kvm_register_irq_ack_notifier(struct kvm *kvm,
				   struct kvm_irq_ack_notifier *kian);
900 901
void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
				   struct kvm_irq_ack_notifier *kian);
902 903
int kvm_request_irq_source_id(struct kvm *kvm);
void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
B
Ben-Ami Yassour 已提交
904

905 906 907 908 909 910 911 912 913
/*
 * search_memslots() and __gfn_to_memslot() are here because they are
 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
 * gfn_to_memslot() itself isn't here as an inline because that would
 * bloat other code too much.
 */
static inline struct kvm_memory_slot *
search_memslots(struct kvm_memslots *slots, gfn_t gfn)
{
914
	int start = 0, end = slots->used_slots;
915
	int slot = atomic_read(&slots->lru_slot);
916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935
	struct kvm_memory_slot *memslots = slots->memslots;

	if (gfn >= memslots[slot].base_gfn &&
	    gfn < memslots[slot].base_gfn + memslots[slot].npages)
		return &memslots[slot];

	while (start < end) {
		slot = start + (end - start) / 2;

		if (gfn >= memslots[slot].base_gfn)
			end = slot;
		else
			start = slot + 1;
	}

	if (gfn >= memslots[start].base_gfn &&
	    gfn < memslots[start].base_gfn + memslots[start].npages) {
		atomic_set(&slots->lru_slot, start);
		return &memslots[start];
	}
936 937 938 939 940 941 942 943 944 945

	return NULL;
}

static inline struct kvm_memory_slot *
__gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
{
	return search_memslots(slots, gfn);
}

946 947 948 949 950 951
static inline unsigned long
__gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
{
	return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
}

952 953 954 955 956
static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
{
	return gfn_to_memslot(kvm, gfn)->id;
}

957 958
static inline gfn_t
hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
959
{
960 961 962
	gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;

	return slot->base_gfn + gfn_offset;
963 964
}

A
Avi Kivity 已提交
965 966 967 968
static inline gpa_t gfn_to_gpa(gfn_t gfn)
{
	return (gpa_t)gfn << PAGE_SHIFT;
}
A
Avi Kivity 已提交
969

970 971 972 973 974
static inline gfn_t gpa_to_gfn(gpa_t gpa)
{
	return (gfn_t)(gpa >> PAGE_SHIFT);
}

D
Dan Williams 已提交
975
static inline hpa_t pfn_to_hpa(kvm_pfn_t pfn)
B
Ben-Ami Yassour 已提交
976 977 978 979
{
	return (hpa_t)pfn << PAGE_SHIFT;
}

980 981 982 983 984 985 986
static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
{
	unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));

	return kvm_is_error_hva(hva);
}

987 988 989 990 991
enum kvm_stat_kind {
	KVM_STAT_VM,
	KVM_STAT_VCPU,
};

992 993 994 995 996
struct kvm_stat_data {
	int offset;
	struct kvm *kvm;
};

997 998 999
struct kvm_stats_debugfs_item {
	const char *name;
	int offset;
1000
	enum kvm_stat_kind kind;
1001 1002
};
extern struct kvm_stats_debugfs_item debugfs_entries[];
1003
extern struct dentry *kvm_debugfs_dir;
1004

1005
#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
1006
static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
1007
{
1008
	if (unlikely(kvm->mmu_notifier_count))
1009 1010
		return 1;
	/*
1011 1012 1013 1014 1015 1016 1017 1018
	 * Ensure the read of mmu_notifier_count happens before the read
	 * of mmu_notifier_seq.  This interacts with the smp_wmb() in
	 * mmu_notifier_invalidate_range_end to make sure that the caller
	 * either sees the old (non-zero) value of mmu_notifier_count or
	 * the new (incremented) value of mmu_notifier_seq.
	 * PowerPC Book3s HV KVM calls this under a per-page lock
	 * rather than under kvm->mmu_lock, for scalability, so
	 * can't rely on kvm->mmu_lock to keep things ordered.
1019
	 */
1020
	smp_rmb();
1021
	if (kvm->mmu_notifier_seq != mmu_seq)
1022 1023 1024 1025 1026
		return 1;
	return 0;
}
#endif

1027
#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1028

1029 1030
#ifdef CONFIG_S390
#define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
E
Eric Auger 已提交
1031 1032
#elif defined(CONFIG_ARM64)
#define KVM_MAX_IRQ_ROUTES 4096
1033
#else
1034
#define KVM_MAX_IRQ_ROUTES 1024
1035
#endif
1036

1037
bool kvm_arch_can_set_irq_routing(struct kvm *kvm);
1038 1039 1040 1041
int kvm_set_irq_routing(struct kvm *kvm,
			const struct kvm_irq_routing_entry *entries,
			unsigned nr,
			unsigned flags);
1042 1043
int kvm_set_routing_entry(struct kvm *kvm,
			  struct kvm_kernel_irq_routing_entry *e,
1044
			  const struct kvm_irq_routing_entry *ue);
1045 1046 1047 1048 1049 1050 1051 1052
void kvm_free_irq_routing(struct kvm *kvm);

#else

static inline void kvm_free_irq_routing(struct kvm *kvm) {}

#endif

1053 1054
int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);

G
Gregory Haskins 已提交
1055 1056
#ifdef CONFIG_HAVE_KVM_EVENTFD

G
Gregory Haskins 已提交
1057
void kvm_eventfd_init(struct kvm *kvm);
1058 1059
int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);

1060
#ifdef CONFIG_HAVE_KVM_IRQFD
1061
int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
G
Gregory Haskins 已提交
1062
void kvm_irqfd_release(struct kvm *kvm);
1063
void kvm_irq_routing_update(struct kvm *);
1064 1065 1066 1067 1068 1069 1070 1071
#else
static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
{
	return -EINVAL;
}

static inline void kvm_irqfd_release(struct kvm *kvm) {}
#endif
G
Gregory Haskins 已提交
1072 1073 1074

#else

G
Gregory Haskins 已提交
1075
static inline void kvm_eventfd_init(struct kvm *kvm) {}
1076

1077
static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
G
Gregory Haskins 已提交
1078 1079 1080 1081 1082
{
	return -EINVAL;
}

static inline void kvm_irqfd_release(struct kvm *kvm) {}
1083

A
Alexander Graf 已提交
1084
#ifdef CONFIG_HAVE_KVM_IRQCHIP
1085
static inline void kvm_irq_routing_update(struct kvm *kvm)
1086 1087
{
}
A
Alexander Graf 已提交
1088
#endif
1089
void kvm_arch_irq_routing_update(struct kvm *kvm);
1090

G
Gregory Haskins 已提交
1091 1092 1093 1094
static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
{
	return -ENOSYS;
}
G
Gregory Haskins 已提交
1095 1096 1097

#endif /* CONFIG_HAVE_KVM_EVENTFD */

1098 1099
static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
{
1100 1101 1102 1103 1104
	/*
	 * Ensure the rest of the request is published to kvm_check_request's
	 * caller.  Paired with the smp_mb__after_atomic in kvm_check_request.
	 */
	smp_wmb();
1105
	set_bit(req & KVM_REQUEST_MASK, &vcpu->requests);
1106 1107
}

R
Radim Krčmář 已提交
1108 1109 1110 1111 1112
static inline bool kvm_request_pending(struct kvm_vcpu *vcpu)
{
	return READ_ONCE(vcpu->requests);
}

1113 1114
static inline bool kvm_test_request(int req, struct kvm_vcpu *vcpu)
{
1115
	return test_bit(req & KVM_REQUEST_MASK, &vcpu->requests);
1116 1117 1118 1119
}

static inline void kvm_clear_request(int req, struct kvm_vcpu *vcpu)
{
1120
	clear_bit(req & KVM_REQUEST_MASK, &vcpu->requests);
1121 1122
}

1123 1124
static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
{
1125 1126
	if (kvm_test_request(req, vcpu)) {
		kvm_clear_request(req, vcpu);
1127 1128 1129 1130 1131 1132

		/*
		 * Ensure the rest of the request is visible to kvm_check_request's
		 * caller.  Paired with the smp_wmb in kvm_make_request.
		 */
		smp_mb__after_atomic();
1133 1134 1135 1136
		return true;
	} else {
		return false;
	}
1137 1138
}

1139 1140
extern bool kvm_rebooting;

1141 1142 1143 1144
extern unsigned int halt_poll_ns;
extern unsigned int halt_poll_ns_grow;
extern unsigned int halt_poll_ns_shrink;

S
Scott Wood 已提交
1145 1146 1147 1148
struct kvm_device {
	struct kvm_device_ops *ops;
	struct kvm *kvm;
	void *private;
1149
	struct list_head vm_node;
S
Scott Wood 已提交
1150 1151 1152 1153 1154
};

/* create, destroy, and name are mandatory */
struct kvm_device_ops {
	const char *name;
1155 1156 1157 1158 1159 1160

	/*
	 * create is called holding kvm->lock and any operations not suitable
	 * to do while holding the lock should be deferred to init (see
	 * below).
	 */
S
Scott Wood 已提交
1161 1162
	int (*create)(struct kvm_device *dev, u32 type);

1163 1164 1165 1166 1167 1168
	/*
	 * init is called after create if create is successful and is called
	 * outside of holding kvm->lock.
	 */
	void (*init)(struct kvm_device *dev);

S
Scott Wood 已提交
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188
	/*
	 * Destroy is responsible for freeing dev.
	 *
	 * Destroy may be called before or after destructors are called
	 * on emulated I/O regions, depending on whether a reference is
	 * held by a vcpu or other kvm component that gets destroyed
	 * after the emulated I/O.
	 */
	void (*destroy)(struct kvm_device *dev);

	int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
	int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
	int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
	long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
		      unsigned long arg);
};

void kvm_device_get(struct kvm_device *dev);
void kvm_device_put(struct kvm_device *dev);
struct kvm_device *kvm_device_from_filp(struct file *filp);
1189
int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1190
void kvm_unregister_device_ops(u32 type);
S
Scott Wood 已提交
1191

1192
extern struct kvm_device_ops kvm_mpic_ops;
1193
extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1194
extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1195

1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216
#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT

static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
{
	vcpu->spin_loop.in_spin_loop = val;
}
static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
{
	vcpu->spin_loop.dy_eligible = val;
}

#else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */

static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
{
}

static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
{
}
#endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1217 1218

#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1219
bool kvm_arch_has_irq_bypass(void);
1220 1221 1222 1223 1224 1225
int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
			   struct irq_bypass_producer *);
void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
			   struct irq_bypass_producer *);
void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
1226 1227
int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
				  uint32_t guest_irq, bool set);
1228
#endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
1229

1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243
#ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
/* If we wakeup during the poll time, was it a sucessful poll? */
static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
{
	return vcpu->valid_wakeup;
}

#else
static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
{
	return true;
}
#endif /* CONFIG_HAVE_KVM_INVALID_WAKEUPS */

1244
#endif