KVM: Implement kvm_put_guest()

				  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);

#define __kvm_put_guest(kvm, gfn, offset, value, type)			\

({									\

	unsigned long __addr = gfn_to_hva(kvm, gfn);			\

	type __user *__uaddr = (type __user *)(__addr + offset);	\

	int __ret = -EFAULT;						\

									\

	if (!kvm_is_error_hva(__addr))					\

		__ret = put_user(value, __uaddr);			\

	if (!__ret)							\

		mark_page_dirty(kvm, gfn);				\

	__ret;								\

})

#define kvm_put_guest(kvm, gpa, value, type)				\

({									\

	gpa_t __gpa = gpa;						\

	struct kvm *__kvm = kvm;					\

	__kvm_put_guest(__kvm, __gpa >> PAGE_SHIFT,			\

			offset_in_page(__gpa), (value), type);		\

})

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);