#ifndef __KVM_HOST_H
  #define __KVM_HOST_H

  
  /*
   * 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>

  #include <linux/hardirq.h>

  #include <linux/list.h>
  #include <linux/mutex.h>
  #include <linux/spinlock.h>

  #include <linux/signal.h>
  #include <linux/sched.h>

  #include <linux/bug.h>

  #include <linux/mm.h>

  #include <linux/mmu_notifier.h>

  #include <linux/preempt.h>

  #include <linux/msi.h>

  #include <linux/slab.h>

  #include <linux/rcupdate.h>

  #include <linux/ratelimit.h>

  #include <linux/err.h>

  #include <linux/irqflags.h>

  #include <linux/context_tracking.h>

  #include <linux/irqbypass.h>

  #include <linux/swait.h>

  #include <asm/signal.h>

  #include <linux/kvm.h>

  #include <linux/kvm_para.h>

  #include <linux/kvm_types.h>

  #include <asm/kvm_host.h>

  #ifndef KVM_MAX_VCPU_ID
  #define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
  #endif

  /*

   * 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)

  #define KVM_MEMSLOT_INCOHERENT	(1UL << 17)

  /* Two fragments for cross MMIO pages. */
  #define KVM_MAX_MMIO_FRAGMENTS	2

  #ifndef KVM_ADDRESS_SPACE_NUM
  #define KVM_ADDRESS_SPACE_NUM	1
  #endif

  /*

   * For the normal pfn, the highest 12 bits should be zero,

   * so we can mask bit 62 ~ bit 52  to indicate the error pfn,
   * mask bit 63 to indicate the noslot pfn.

   */

  #define KVM_PFN_ERR_MASK	(0x7ffULL << 52)
  #define KVM_PFN_ERR_NOSLOT_MASK	(0xfffULL << 52)
  #define KVM_PFN_NOSLOT		(0x1ULL << 63)

  
  #define KVM_PFN_ERR_FAULT	(KVM_PFN_ERR_MASK)
  #define KVM_PFN_ERR_HWPOISON	(KVM_PFN_ERR_MASK + 1)

  #define KVM_PFN_ERR_RO_FAULT	(KVM_PFN_ERR_MASK + 2)

  /*
   * error pfns indicate that the gfn is in slot but faild to
   * translate it to pfn on host.
   */

  static inline bool is_error_pfn(kvm_pfn_t pfn)

  {

  	return !!(pfn & KVM_PFN_ERR_MASK);

  }

  /*
   * 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.
   */

  static inline bool is_error_noslot_pfn(kvm_pfn_t pfn)

  {

  	return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);

  }

  /* noslot pfn indicates that the gfn is not in slot. */

  static inline bool is_noslot_pfn(kvm_pfn_t pfn)

  {

  	return pfn == KVM_PFN_NOSLOT;

  }

  /*
   * 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

  #define KVM_HVA_ERR_BAD		(PAGE_OFFSET)
  #define KVM_HVA_ERR_RO_BAD	(PAGE_OFFSET + PAGE_SIZE)

  
  static inline bool kvm_is_error_hva(unsigned long addr)
  {

  	return addr >= PAGE_OFFSET;

  }

  #endif

  #define KVM_ERR_PTR_BAD_PAGE	(ERR_PTR(-ENOENT))

  static inline bool is_error_page(struct page *page)

  {
  	return IS_ERR(page);
  }

  /*

   * Architecture-independent vcpu->requests bit members
   * Bits 4-7 are reserved for more arch-independent bits.

   */

  #define KVM_REQ_TLB_FLUSH          0

  #define KVM_REQ_MMU_RELOAD         1
  #define KVM_REQ_PENDING_TIMER      2
  #define KVM_REQ_UNHALT             3

  #define KVM_USERSPACE_IRQ_SOURCE_ID		0
  #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID	1

  extern struct kmem_cache *kvm_vcpu_cache;

  extern spinlock_t kvm_lock;

  extern struct list_head vm_list;

  struct kvm_io_range {
  	gpa_t addr;
  	int len;
  	struct kvm_io_device *dev;
  };

  #define NR_IOBUS_DEVS 1000

  struct kvm_io_bus {

  	int dev_count;
  	int ioeventfd_count;

  	struct kvm_io_range range[];

  };

  enum kvm_bus {
  	KVM_MMIO_BUS,
  	KVM_PIO_BUS,

  	KVM_VIRTIO_CCW_NOTIFY_BUS,

  	KVM_FAST_MMIO_BUS,

  	KVM_NR_BUSES
  };

  int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,

  		     int len, const void *val);

  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);

  int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  			    int len, struct kvm_io_device *dev);

  int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  			      struct kvm_io_device *dev);

  struct kvm_io_device *kvm_io_bus_get_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  					 gpa_t addr);

  #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;

  	bool   wakeup_all;

  };
  
  void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
  void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);

  int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,

  		       struct kvm_arch_async_pf *arch);

  int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);

  #endif

  enum {
  	OUTSIDE_GUEST_MODE,
  	IN_GUEST_MODE,

  	EXITING_GUEST_MODE,
  	READING_SHADOW_PAGE_TABLES,

  };

  /*
   * 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;
  };

  struct kvm_vcpu {
  	struct kvm *kvm;

  #ifdef CONFIG_PREEMPT_NOTIFIERS

  	struct preempt_notifier preempt_notifier;

  #endif

  	int cpu;

  	int vcpu_id;

  	int srcu_idx;
  	int mode;

  	unsigned long requests;

  	unsigned long guest_debug;

  	int pre_pcpu;
  	struct list_head blocked_vcpu_list;

  	struct mutex mutex;
  	struct kvm_run *run;

  	int fpu_active;

  	int guest_fpu_loaded, guest_xcr0_loaded;

  	struct swait_queue_head wq;

  	struct pid *pid;

  	int sigset_active;
  	sigset_t sigset;
  	struct kvm_vcpu_stat stat;

  	unsigned int halt_poll_ns;

  	bool valid_wakeup;

  #ifdef CONFIG_HAS_IOMEM

  	int mmio_needed;
  	int mmio_read_completed;
  	int mmio_is_write;

  	int mmio_cur_fragment;
  	int mmio_nr_fragments;
  	struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];

  #endif

  #ifdef CONFIG_KVM_ASYNC_PF
  	struct {
  		u32 queued;
  		struct list_head queue;
  		struct list_head done;
  		spinlock_t lock;
  	} async_pf;
  #endif

  #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

  	bool preempted;

  	struct kvm_vcpu_arch arch;

  	struct dentry *debugfs_dentry;

  };

  static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
  {
  	return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
  }

  /*
   * 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)

  struct kvm_memory_slot {
  	gfn_t base_gfn;
  	unsigned long npages;

  	unsigned long *dirty_bitmap;

  	struct kvm_arch_memory_slot arch;

  	unsigned long userspace_addr;

  	u32 flags;

  	short id;

  };

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

  struct kvm_s390_adapter_int {
  	u64 ind_addr;
  	u64 summary_addr;
  	u64 ind_offset;
  	u32 summary_offset;
  	u32 adapter_id;
  };

  struct kvm_hv_sint {
  	u32 vcpu;
  	u32 sint;
  };

  struct kvm_kernel_irq_routing_entry {
  	u32 gsi;

  	u32 type;

  	int (*set)(struct kvm_kernel_irq_routing_entry *e,

  		   struct kvm *kvm, int irq_source_id, int level,
  		   bool line_status);

  	union {
  		struct {
  			unsigned irqchip;
  			unsigned pin;
  		} irqchip;

  		struct {
  			u32 address_lo;
  			u32 address_hi;
  			u32 data;
  			u32 flags;
  			u32 devid;
  		} msi;

  		struct kvm_s390_adapter_int adapter;

  		struct kvm_hv_sint hv_sint;

  	};

  	struct hlist_node link;
  };

  #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

  #ifndef KVM_PRIVATE_MEM_SLOTS
  #define KVM_PRIVATE_MEM_SLOTS 0
  #endif

  #ifndef KVM_MEM_SLOTS_NUM

  #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)

  #endif

  #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
  static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
  {
  	return 0;
  }
  #endif

  /*
   * Note:
   * memslots are not sorted by id anymore, please use id_to_memslot()
   * to get the memslot by its id.
   */

  struct kvm_memslots {

  	u64 generation;

  	struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];

  	/* The mapping table from slot id to the index in memslots[]. */

  	short id_to_index[KVM_MEM_SLOTS_NUM];

  	atomic_t lru_slot;

  	int used_slots;

  };

  struct kvm {

  	spinlock_t mmu_lock;

  	struct mutex slots_lock;

  	struct mm_struct *mm; /* userspace tied to this vm */

  	struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];

  	struct srcu_struct srcu;

  	struct srcu_struct irq_srcu;

  	struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];

  
  	/*
  	 * 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.
  	 */

  	atomic_t online_vcpus;

  	int created_vcpus;

  	int last_boosted_vcpu;

  	struct list_head vm_list;

  	struct mutex lock;

  	struct kvm_io_bus *buses[KVM_NR_BUSES];

  #ifdef CONFIG_HAVE_KVM_EVENTFD
  	struct {
  		spinlock_t        lock;
  		struct list_head  items;

  		struct list_head  resampler_list;
  		struct mutex      resampler_lock;

  	} irqfds;

  	struct list_head ioeventfds;

  #endif

  	struct kvm_vm_stat stat;

  	struct kvm_arch arch;

  	atomic_t users_count;

  #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET

  	struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;

  	spinlock_t ring_lock;
  	struct list_head coalesced_zones;

  #endif

  	struct mutex irq_lock;

  #ifdef CONFIG_HAVE_KVM_IRQCHIP

  	/*

  	 * Update side is protected by irq_lock.

  	 */

  	struct kvm_irq_routing_table __rcu *irq_routing;

  #endif
  #ifdef CONFIG_HAVE_KVM_IRQFD

  	struct hlist_head irq_ack_notifier_list;

  #endif

  #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)

  	struct mmu_notifier mmu_notifier;
  	unsigned long mmu_notifier_seq;
  	long mmu_notifier_count;
  #endif

  	long tlbs_dirty;

  	struct list_head devices;

  	struct dentry *debugfs_dentry;
  	struct kvm_stat_data **debugfs_stat_data;

  };

  #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__)

  #define kvm_debug_ratelimited(fmt, ...) \
  	pr_debug_ratelimited("kvm [%i]: " fmt, task_pid_nr(current), \
  			     ## __VA_ARGS__)

  #define kvm_pr_unimpl(fmt, ...) \
  	pr_err_ratelimited("kvm [%i]: " fmt, \
  			   task_tgid_nr(current), ## __VA_ARGS__)

  /* The guest did something we don't support. */
  #define vcpu_unimpl(vcpu, fmt, ...)					\

  	kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt,			\
  			(vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)

  #define vcpu_debug(vcpu, fmt, ...)					\
  	kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)

  #define vcpu_debug_ratelimited(vcpu, fmt, ...)				\
  	kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id,           \
  			      ## __VA_ARGS__)

  #define vcpu_err(vcpu, fmt, ...)					\
  	kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)

  static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
  {

  	/* 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).
  	 */

  	smp_rmb();
  	return kvm->vcpus[i];
  }
  
  #define kvm_for_each_vcpu(idx, vcpup, kvm) \

  	for (idx = 0; \
  	     idx < atomic_read(&kvm->online_vcpus) && \
  	     (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
  	     idx++)

  static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
  {

  	struct kvm_vcpu *vcpu = NULL;

  	int i;

  	if (id < 0)

  		return NULL;

  	if (id < KVM_MAX_VCPUS)
  		vcpu = kvm_get_vcpu(kvm, id);

  	if (vcpu && vcpu->vcpu_id == id)
  		return vcpu;

  	kvm_for_each_vcpu(i, vcpu, kvm)
  		if (vcpu->vcpu_id == id)
  			return vcpu;
  	return NULL;
  }

  #define kvm_for_each_memslot(memslot, slots)	\
  	for (memslot = &slots->memslots[0];	\

  	      memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
  		memslot++)

  int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
  void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);

  int __must_check vcpu_load(struct kvm_vcpu *vcpu);

  void vcpu_put(struct kvm_vcpu *vcpu);

  #ifdef __KVM_HAVE_IOAPIC
  void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);

  void kvm_arch_post_irq_routing_update(struct kvm *kvm);

  #else
  static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm)
  {
  }

  static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)

  {
  }

  #endif

  #ifdef CONFIG_HAVE_KVM_IRQFD

  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

  int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,

  		  struct module *module);

  void kvm_exit(void);

  void kvm_get_kvm(struct kvm *kvm);
  void kvm_put_kvm(struct kvm *kvm);

  static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)

  {

  	return rcu_dereference_check(kvm->memslots[as_id],

  			srcu_read_lock_held(&kvm->srcu)
  			|| lockdep_is_held(&kvm->slots_lock));
  }

  static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
  {
  	return __kvm_memslots(kvm, 0);
  }

  static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
  {

  	int as_id = kvm_arch_vcpu_memslots_id(vcpu);
  
  	return __kvm_memslots(vcpu->kvm, as_id);

  }

  static inline struct kvm_memory_slot *
  id_to_memslot(struct kvm_memslots *slots, int id)
  {

  	int index = slots->id_to_index[id];
  	struct kvm_memory_slot *slot;

  	slot = &slots->memslots[index];

  	WARN_ON(slot->id != id);
  	return slot;

  }

  /*
   * 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,
  };

  int kvm_set_memory_region(struct kvm *kvm,

  			  const struct kvm_userspace_memory_region *mem);

  int __kvm_set_memory_region(struct kvm *kvm,

  			    const struct kvm_userspace_memory_region *mem);

  void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,

  			   struct kvm_memory_slot *dont);

  int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
  			    unsigned long npages);

  void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);

  int kvm_arch_prepare_memory_region(struct kvm *kvm,
  				struct kvm_memory_slot *memslot,

  				const struct kvm_userspace_memory_region *mem,

  				enum kvm_mr_change change);

  void kvm_arch_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,

  				enum kvm_mr_change change);

  bool kvm_largepages_enabled(void);

  void kvm_disable_largepages(void);

  /* 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);

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

  struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);

  unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);

  unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);

  unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);

  unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
  				      bool *writable);

  void kvm_release_page_clean(struct page *page);
  void kvm_release_page_dirty(struct page *page);

  void kvm_set_page_accessed(struct page *page);

  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,

  		      bool *writable);

  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);

  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);

  int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
  			int len);

  int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
  			  unsigned long len);

  int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);

  int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
  			   void *data, unsigned long len);

  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);

  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);

  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);

  struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);

  bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);

  unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);

  void mark_page_dirty(struct kvm *kvm, gfn_t gfn);

  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);

  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);

  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);

  void kvm_vcpu_block(struct kvm_vcpu *vcpu);

  void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
  void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);

  void kvm_vcpu_wake_up(struct kvm_vcpu *vcpu);

  void kvm_vcpu_kick(struct kvm_vcpu *vcpu);

  int kvm_vcpu_yield_to(struct kvm_vcpu *target);

  void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);

  void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
  void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);

  void kvm_flush_remote_tlbs(struct kvm *kvm);

  void kvm_reload_remote_mmus(struct kvm *kvm);

  bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);

  long kvm_arch_dev_ioctl(struct file *filp,
  			unsigned int ioctl, unsigned long arg);

  long kvm_arch_vcpu_ioctl(struct file *filp,
  			 unsigned int ioctl, unsigned long arg);

  int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);

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

  int kvm_get_dirty_log(struct kvm *kvm,
  			struct kvm_dirty_log *log, int *is_dirty);

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

  void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,

  					struct kvm_memory_slot *slot,
  					gfn_t gfn_offset,
  					unsigned long mask);

  int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
  				struct kvm_dirty_log *log);

  int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
  			bool line_status);

  long kvm_arch_vm_ioctl(struct file *filp,
  		       unsigned int ioctl, unsigned long arg);

  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);

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

  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);

  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);

  int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
  					struct kvm_guest_debug *dbg);

  int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);

  int kvm_arch_init(void *opaque);
  void kvm_arch_exit(void);

  int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
  void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);

  void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);

  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);

  int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);

  void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);

  void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);

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

  int kvm_arch_hardware_enable(void);
  void kvm_arch_hardware_disable(void);

  int kvm_arch_hardware_setup(void);
  void kvm_arch_hardware_unsetup(void);
  void kvm_arch_check_processor_compat(void *rtn);

  int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);

  int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);

  void *kvm_kvzalloc(unsigned long size);

  #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

  #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

  #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

  static inline struct swait_queue_head *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)

  {

  #ifdef __KVM_HAVE_ARCH_WQP
  	return vcpu->arch.wqp;
  #else

  	return &vcpu->wq;

  #endif

  }

  #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

  int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);

  void kvm_arch_destroy_vm(struct kvm *kvm);

  void kvm_arch_sync_events(struct kvm *kvm);

  int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);

  void kvm_vcpu_kick(struct kvm_vcpu *vcpu);

  bool kvm_is_reserved_pfn(kvm_pfn_t pfn);

  struct kvm_irq_ack_notifier {
  	struct hlist_node link;
  	unsigned gsi;
  	void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
  };

  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);

  int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
  		bool line_status);

  int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,

  		int irq_source_id, int level, bool line_status);

  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);

  bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);

  void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);

  void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);

  void kvm_register_irq_ack_notifier(struct kvm *kvm,
  				   struct kvm_irq_ack_notifier *kian);

  void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
  				   struct kvm_irq_ack_notifier *kian);

  int kvm_request_irq_source_id(struct kvm *kvm);
  void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);

  #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT

  int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);

  void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);

  #else

  static inline int kvm_iommu_map_pages(struct kvm *kvm,

  				      struct kvm_memory_slot *slot)

  {
  	return 0;
  }

  static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
  					 struct kvm_memory_slot *slot)
  {
  }

  #endif

  /*
   * 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)
  {

  	int start = 0, end = slots->used_slots;

  	int slot = atomic_read(&slots->lru_slot);

  	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];
  	}

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

  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;
  }

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

  static inline gfn_t
  hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)

  {

  	gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
  
  	return slot->base_gfn + gfn_offset;

  }

  static inline gpa_t gfn_to_gpa(gfn_t gfn)
  {
  	return (gpa_t)gfn << PAGE_SHIFT;
  }

  static inline gfn_t gpa_to_gfn(gpa_t gpa)
  {
  	return (gfn_t)(gpa >> PAGE_SHIFT);
  }

  static inline hpa_t pfn_to_hpa(kvm_pfn_t pfn)

  {
  	return (hpa_t)pfn << PAGE_SHIFT;
  }

  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);
  }

  enum kvm_stat_kind {
  	KVM_STAT_VM,
  	KVM_STAT_VCPU,
  };

  struct kvm_stat_data {
  	int offset;
  	struct kvm *kvm;
  };

  struct kvm_stats_debugfs_item {
  	const char *name;
  	int offset;

  	enum kvm_stat_kind kind;

  };
  extern struct kvm_stats_debugfs_item debugfs_entries[];

  extern struct dentry *kvm_debugfs_dir;

  #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)

  static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)

  {

  	if (unlikely(kvm->mmu_notifier_count))

  		return 1;
  	/*

  	 * 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.

  	 */

  	smp_rmb();

  	if (kvm->mmu_notifier_seq != mmu_seq)

  		return 1;
  	return 0;
  }
  #endif

  #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING

  #ifdef CONFIG_S390
  #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...

  #elif defined(CONFIG_ARM64)
  #define KVM_MAX_IRQ_ROUTES 4096

  #else

  #define KVM_MAX_IRQ_ROUTES 1024

  #endif

  int kvm_set_irq_routing(struct kvm *kvm,
  			const struct kvm_irq_routing_entry *entries,
  			unsigned nr,
  			unsigned flags);

  int kvm_set_routing_entry(struct kvm *kvm,
  			  struct kvm_kernel_irq_routing_entry *e,

  			  const struct kvm_irq_routing_entry *ue);

  void kvm_free_irq_routing(struct kvm *kvm);
  
  #else
  
  static inline void kvm_free_irq_routing(struct kvm *kvm) {}
  
  #endif

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

  #ifdef CONFIG_HAVE_KVM_EVENTFD

  void kvm_eventfd_init(struct kvm *kvm);

  int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);

  #ifdef CONFIG_HAVE_KVM_IRQFD

  int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);

  void kvm_irqfd_release(struct kvm *kvm);

  void kvm_irq_routing_update(struct kvm *);

  #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

  
  #else

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

  static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)

  {
  	return -EINVAL;
  }
  
  static inline void kvm_irqfd_release(struct kvm *kvm) {}

  #ifdef CONFIG_HAVE_KVM_IRQCHIP

  static inline void kvm_irq_routing_update(struct kvm *kvm)

  {

  }

  #endif

  void kvm_arch_irq_routing_update(struct kvm *kvm);

  static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
  {
  	return -ENOSYS;
  }

  
  #endif /* CONFIG_HAVE_KVM_EVENTFD */

  static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
  {

  	/*
  	 * 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();

  	set_bit(req, &vcpu->requests);
  }

  static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
  {

  	if (test_bit(req, &vcpu->requests)) {
  		clear_bit(req, &vcpu->requests);

  
  		/*
  		 * 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();

  		return true;
  	} else {
  		return false;
  	}

  }

  extern bool kvm_rebooting;

  extern unsigned int halt_poll_ns;
  extern unsigned int halt_poll_ns_grow;
  extern unsigned int halt_poll_ns_shrink;

  struct kvm_device {
  	struct kvm_device_ops *ops;
  	struct kvm *kvm;

  	void *private;

  	struct list_head vm_node;

  };
  
  /* create, destroy, and name are mandatory */
  struct kvm_device_ops {
  	const char *name;

  
  	/*
  	 * create is called holding kvm->lock and any operations not suitable
  	 * to do while holding the lock should be deferred to init (see
  	 * below).
  	 */

  	int (*create)(struct kvm_device *dev, u32 type);
  
  	/*

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

  	 * 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);

  int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);

  void kvm_unregister_device_ops(u32 type);

  extern struct kvm_device_ops kvm_mpic_ops;

  extern struct kvm_device_ops kvm_xics_ops;

  extern struct kvm_device_ops kvm_arm_vgic_v2_ops;

  extern struct kvm_device_ops kvm_arm_vgic_v3_ops;

  #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 */

  
  #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS

  bool kvm_arch_has_irq_bypass(void);

  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 *);

  int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
  				  uint32_t guest_irq, bool set);

  #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */

  #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 */

  #endif