[mirror_ubuntu-artful-kernel.git] / include / linux / kvm_host.h

#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/mm.h>
#include <linux/preempt.h>
#include <linux/msi.h>
#include <asm/signal.h>

#include <linux/kvm.h>
#include <linux/kvm_para.h>

#include <linux/kvm_types.h>

#include <asm/kvm_host.h>

/*
 * vcpu->requests bit members
 */
#define KVM_REQ_TLB_FLUSH          0
#define KVM_REQ_MIGRATE_TIMER      1
#define KVM_REQ_REPORT_TPR_ACCESS  2
#define KVM_REQ_MMU_RELOAD         3
#define KVM_REQ_TRIPLE_FAULT       4
#define KVM_REQ_PENDING_TIMER      5
#define KVM_REQ_UNHALT             6
#define KVM_REQ_MMU_SYNC           7
#define KVM_REQ_KVMCLOCK_UPDATE    8
#define KVM_REQ_KICK               9

#define KVM_USERSPACE_IRQ_SOURCE_ID	0

struct kvm;
struct kvm_vcpu;
extern struct kmem_cache *kvm_vcpu_cache;

/*
 * It would be nice to use something smarter than a linear search, TBD...
 * Thankfully we dont expect many devices to register (famous last words :),
 * so until then it will suffice.  At least its abstracted so we can change
 * in one place.
 */
struct kvm_io_bus {
	int                   dev_count;
#define NR_IOBUS_DEVS 6
	struct kvm_io_device *devs[NR_IOBUS_DEVS];
};

void kvm_io_bus_init(struct kvm_io_bus *bus);
void kvm_io_bus_destroy(struct kvm_io_bus *bus);
int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, int len,
		     const void *val);
int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len,
		    void *val);
int __kvm_io_bus_register_dev(struct kvm_io_bus *bus,
			       struct kvm_io_device *dev);
int kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus,
			    struct kvm_io_device *dev);
void __kvm_io_bus_unregister_dev(struct kvm_io_bus *bus,
				 struct kvm_io_device *dev);
void kvm_io_bus_unregister_dev(struct kvm *kvm, struct kvm_io_bus *bus,
			       struct kvm_io_device *dev);

struct kvm_vcpu {
	struct kvm *kvm;
#ifdef CONFIG_PREEMPT_NOTIFIERS
	struct preempt_notifier preempt_notifier;
#endif
	int vcpu_id;
	struct mutex mutex;
	int   cpu;
	struct kvm_run *run;
	unsigned long requests;
	unsigned long guest_debug;
	int fpu_active;
	int guest_fpu_loaded;
	wait_queue_head_t wq;
	int sigset_active;
	sigset_t sigset;
	struct kvm_vcpu_stat stat;

#ifdef CONFIG_HAS_IOMEM
	int mmio_needed;
	int mmio_read_completed;
	int mmio_is_write;
	int mmio_size;
	unsigned char mmio_data[8];
	gpa_t mmio_phys_addr;
#endif

	struct kvm_vcpu_arch arch;
};

struct kvm_memory_slot {
	gfn_t base_gfn;
	unsigned long npages;
	unsigned long flags;
	unsigned long *rmap;
	unsigned long *dirty_bitmap;
	struct {
		unsigned long rmap_pde;
		int write_count;
	} *lpage_info[KVM_NR_PAGE_SIZES - 1];
	unsigned long userspace_addr;
	int user_alloc;
};

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);
	union {
		struct {
			unsigned irqchip;
			unsigned pin;
		} irqchip;
		struct msi_msg msi;
	};
	struct hlist_node link;
};

#ifdef __KVM_HAVE_IOAPIC

struct kvm_irq_routing_table {
	int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
	struct kvm_kernel_irq_routing_entry *rt_entries;
	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];
};

#else

struct kvm_irq_routing_table {};

#endif

struct kvm {
	spinlock_t mmu_lock;
	spinlock_t requests_lock;
	struct rw_semaphore slots_lock;
	struct mm_struct *mm; /* userspace tied to this vm */
	int nmemslots;
	struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
					KVM_PRIVATE_MEM_SLOTS];
#ifdef CONFIG_KVM_APIC_ARCHITECTURE
	u32 bsp_vcpu_id;
	struct kvm_vcpu *bsp_vcpu;
#endif
	struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
	atomic_t online_vcpus;
	struct list_head vm_list;
	struct mutex lock;
	struct kvm_io_bus mmio_bus;
	struct kvm_io_bus pio_bus;
#ifdef CONFIG_HAVE_KVM_EVENTFD
	struct {
		spinlock_t        lock;
		struct list_head  items;
	} 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_dev *coalesced_mmio_dev;
	struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
#endif

	struct mutex irq_lock;
#ifdef CONFIG_HAVE_KVM_IRQCHIP
	struct kvm_irq_routing_table *irq_routing;
	struct hlist_head mask_notifier_list;
#endif

#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
	struct mmu_notifier mmu_notifier;
	unsigned long mmu_notifier_seq;
	long mmu_notifier_count;
#endif
};

/* The guest did something we don't support. */
#define pr_unimpl(vcpu, fmt, ...)					\
 do {									\
	if (printk_ratelimit())						\
		printk(KERN_ERR "kvm: %i: cpu%i " fmt,			\
		       current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 } while (0)

#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)

static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
{
	smp_rmb();
	return kvm->vcpus[i];
}

#define kvm_for_each_vcpu(idx, vcpup, kvm) \
	for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
	     idx < atomic_read(&kvm->online_vcpus) && vcpup; \
	     vcpup = kvm_get_vcpu(kvm, ++idx))

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

void vcpu_load(struct kvm_vcpu *vcpu);
void vcpu_put(struct kvm_vcpu *vcpu);

int kvm_init(void *opaque, unsigned int vcpu_size,
		  struct module *module);
void kvm_exit(void);

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

#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);

extern struct page *bad_page;
extern pfn_t bad_pfn;

int is_error_page(struct page *page);
int is_error_pfn(pfn_t pfn);
int kvm_is_error_hva(unsigned long addr);
int kvm_set_memory_region(struct kvm *kvm,
			  struct kvm_userspace_memory_region *mem,
			  int user_alloc);
int __kvm_set_memory_region(struct kvm *kvm,
			    struct kvm_userspace_memory_region *mem,
			    int user_alloc);
int kvm_arch_set_memory_region(struct kvm *kvm,
				struct kvm_userspace_memory_region *mem,
				struct kvm_memory_slot old,
				int user_alloc);
void kvm_disable_largepages(void);
void kvm_arch_flush_shadow(struct kvm *kvm);
gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
void kvm_release_page_clean(struct page *page);
void kvm_release_page_dirty(struct page *page);
void kvm_set_page_dirty(struct page *page);
void kvm_set_page_accessed(struct page *page);

pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
void kvm_release_pfn_dirty(pfn_t);
void kvm_release_pfn_clean(pfn_t pfn);
void kvm_set_pfn_dirty(pfn_t pfn);
void kvm_set_pfn_accessed(pfn_t pfn);
void kvm_get_pfn(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_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_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);
int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
void mark_page_dirty(struct kvm *kvm, gfn_t gfn);

void kvm_vcpu_block(struct kvm_vcpu *vcpu);
void kvm_resched(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);

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_dev_ioctl_check_extension(long ext);

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

int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
				   struct
				   kvm_userspace_memory_region *mem,
				   int user_alloc);
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_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_destroy(struct kvm_vcpu *vcpu);

int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
void kvm_arch_hardware_enable(void *garbage);
void kvm_arch_hardware_disable(void *garbage);
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);

void kvm_free_physmem(struct kvm *kvm);

struct  kvm *kvm_arch_create_vm(void);
void kvm_arch_destroy_vm(struct kvm *kvm);
void kvm_free_all_assigned_devices(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);

int kvm_is_mmio_pfn(pfn_t pfn);

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

#define KVM_ASSIGNED_MSIX_PENDING		0x1
struct kvm_guest_msix_entry {
	u32 vector;
	u16 entry;
	u16 flags;
};

struct kvm_assigned_dev_kernel {
	struct kvm_irq_ack_notifier ack_notifier;
	struct work_struct interrupt_work;
	struct list_head list;
	int assigned_dev_id;
	int host_busnr;
	int host_devfn;
	unsigned int entries_nr;
	int host_irq;
	bool host_irq_disabled;
	struct msix_entry *host_msix_entries;
	int guest_irq;
	struct kvm_guest_msix_entry *guest_msix_entries;
	unsigned long irq_requested_type;
	int irq_source_id;
	int flags;
	struct pci_dev *dev;
	struct kvm *kvm;
	spinlock_t assigned_dev_lock;
};

struct kvm_irq_mask_notifier {
	void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
	int irq;
	struct hlist_node link;
};

void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
				    struct kvm_irq_mask_notifier *kimn);
void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
				      struct kvm_irq_mask_notifier *kimn);
void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);

#ifdef __KVM_HAVE_IOAPIC
void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
				   union kvm_ioapic_redirect_entry *entry,
				   unsigned long *deliver_bitmask);
#endif
int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
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);

/* For vcpu->arch.iommu_flags */
#define KVM_IOMMU_CACHE_COHERENCY	0x1

#ifdef CONFIG_IOMMU_API
int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
			unsigned long npages);
int kvm_iommu_map_guest(struct kvm *kvm);
int kvm_iommu_unmap_guest(struct kvm *kvm);
int kvm_assign_device(struct kvm *kvm,
		      struct kvm_assigned_dev_kernel *assigned_dev);
int kvm_deassign_device(struct kvm *kvm,
			struct kvm_assigned_dev_kernel *assigned_dev);
#else /* CONFIG_IOMMU_API */
static inline int kvm_iommu_map_pages(struct kvm *kvm,
				      gfn_t base_gfn,
				      unsigned long npages)
{
	return 0;
}

static inline int kvm_iommu_map_guest(struct kvm *kvm)
{
	return -ENODEV;
}

static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
{
	return 0;
}

static inline int kvm_assign_device(struct kvm *kvm,
		struct kvm_assigned_dev_kernel *assigned_dev)
{
	return 0;
}

static inline int kvm_deassign_device(struct kvm *kvm,
		struct kvm_assigned_dev_kernel *assigned_dev)
{
	return 0;
}
#endif /* CONFIG_IOMMU_API */

static inline void kvm_guest_enter(void)
{
	account_system_vtime(current);
	current->flags |= PF_VCPU;
}

static inline void kvm_guest_exit(void)
{
	account_system_vtime(current);
	current->flags &= ~PF_VCPU;
}

static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
{
	return slot - kvm->memslots;
}

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

static inline hpa_t pfn_to_hpa(pfn_t pfn)
{
	return (hpa_t)pfn << PAGE_SHIFT;
}

static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
{
	set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
}

enum kvm_stat_kind {
	KVM_STAT_VM,
	KVM_STAT_VCPU,
};

struct kvm_stats_debugfs_item {
	const char *name;
	int offset;
	enum kvm_stat_kind kind;
	struct dentry *dentry;
};
extern struct kvm_stats_debugfs_item debugfs_entries[];
extern struct dentry *kvm_debugfs_dir;

#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
{
	if (unlikely(vcpu->kvm->mmu_notifier_count))
		return 1;
	/*
	 * Both reads happen under the mmu_lock and both values are
	 * modified under mmu_lock, so there's no need of smb_rmb()
	 * here in between, otherwise mmu_notifier_count should be
	 * read before mmu_notifier_seq, see
	 * mmu_notifier_invalidate_range_end write side.
	 */
	if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
		return 1;
	return 0;
}
#endif

#ifdef CONFIG_HAVE_KVM_IRQCHIP

#define KVM_MAX_IRQ_ROUTES 1024

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

#else

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

#endif

#ifdef CONFIG_HAVE_KVM_EVENTFD

void kvm_eventfd_init(struct kvm *kvm);
int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
void kvm_irqfd_release(struct kvm *kvm);
int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);

#else

static inline void kvm_eventfd_init(struct kvm *kvm) {}
static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
{
	return -EINVAL;
}

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

#endif /* CONFIG_HAVE_KVM_EVENTFD */

#ifdef CONFIG_KVM_APIC_ARCHITECTURE
static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
{
	return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
}
#endif
#endif
Commit	Line	Data
edf88417 AK	1	#ifndef __KVM_HOST_H
edf88417 AK	2	#define __KVM_HOST_H
6aa8b732 AK	3
	4	/*
	5	* This work is licensed under the terms of the GNU GPL, version 2. See
	6	* the COPYING file in the top-level directory.
	7	*/
	8
	9	#include <linux/types.h>
e56a7a28	10	#include <linux/hardirq.h>
6aa8b732 AK	11	#include <linux/list.h>
	12	#include <linux/mutex.h>
	13	#include <linux/spinlock.h>
06ff0d37 MR	14	#include <linux/signal.h>
06ff0d37 MR	15	#include <linux/sched.h>
6aa8b732	16	#include <linux/mm.h>
15ad7146	17	#include <linux/preempt.h>
0937c48d	18	#include <linux/msi.h>
e8edc6e0	19	#include <asm/signal.h>
6aa8b732	20
6aa8b732	21	#include <linux/kvm.h>
102d8325	22	#include <linux/kvm_para.h>
6aa8b732	23
edf88417	24	#include <linux/kvm_types.h>
d77a39d9	25
edf88417	26	#include <asm/kvm_host.h>
d657a98e	27
d9e368d6 AK	28	/*
	29	* vcpu->requests bit members
	30	*/
3176bc3e	31	#define KVM_REQ_TLB_FLUSH 0
2f52d58c	32	#define KVM_REQ_MIGRATE_TIMER 1
b209749f	33	#define KVM_REQ_REPORT_TPR_ACCESS 2
2e53d63a	34	#define KVM_REQ_MMU_RELOAD 3
71c4dfaf	35	#define KVM_REQ_TRIPLE_FAULT 4
06e05645	36	#define KVM_REQ_PENDING_TIMER 5
d7690175	37	#define KVM_REQ_UNHALT 6
4731d4c7	38	#define KVM_REQ_MMU_SYNC 7
c8076604	39	#define KVM_REQ_KVMCLOCK_UPDATE 8
32f88400	40	#define KVM_REQ_KICK 9
6aa8b732	41
5550af4d SY	42	#define KVM_USERSPACE_IRQ_SOURCE_ID 0
5550af4d SY	43
6c474694	44	struct kvm;
6aa8b732	45	struct kvm_vcpu;
c16f862d	46	extern struct kmem_cache *kvm_vcpu_cache;
6aa8b732	47
2eeb2e94 GH	48	/*
	49	* It would be nice to use something smarter than a linear search, TBD...
	50	* Thankfully we dont expect many devices to register (famous last words :),
	51	* so until then it will suffice. At least its abstracted so we can change
	52	* in one place.
	53	*/
	54	struct kvm_io_bus {
	55	int dev_count;
	56	#define NR_IOBUS_DEVS 6
	57	struct kvm_io_device *devs[NR_IOBUS_DEVS];
	58	};
	59
	60	void kvm_io_bus_init(struct kvm_io_bus *bus);
	61	void kvm_io_bus_destroy(struct kvm_io_bus *bus);
bda9020e MT	62	int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, int len,
	63	const void *val);
	64	int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len,
	65	void *val);
090b7aff GH	66	int __kvm_io_bus_register_dev(struct kvm_io_bus *bus,
	67	struct kvm_io_device *dev);
	68	int kvm_io_bus_register_dev(struct kvm kvm, struct kvm_io_bus bus,
	69	struct kvm_io_device *dev);
	70	void __kvm_io_bus_unregister_dev(struct kvm_io_bus *bus,
	71	struct kvm_io_device *dev);
	72	void kvm_io_bus_unregister_dev(struct kvm kvm, struct kvm_io_bus bus,
6c474694	73	struct kvm_io_device *dev);
2eeb2e94	74
d17fbbf7 ZX	75	struct kvm_vcpu {
d17fbbf7 ZX	76	struct kvm *kvm;
31bb117e	77	#ifdef CONFIG_PREEMPT_NOTIFIERS
d17fbbf7	78	struct preempt_notifier preempt_notifier;
31bb117e	79	#endif
d17fbbf7 ZX	80	int vcpu_id;
	81	struct mutex mutex;
	82	int cpu;
	83	struct kvm_run *run;
d17fbbf7	84	unsigned long requests;
d0bfb940	85	unsigned long guest_debug;
d17fbbf7 ZX	86	int fpu_active;
	87	int guest_fpu_loaded;
	88	wait_queue_head_t wq;
	89	int sigset_active;
	90	sigset_t sigset;
	91	struct kvm_vcpu_stat stat;
	92
34c16eec	93	#ifdef CONFIG_HAS_IOMEM
d17fbbf7 ZX	94	int mmio_needed;
	95	int mmio_read_completed;
	96	int mmio_is_write;
	97	int mmio_size;
	98	unsigned char mmio_data[8];
6aa8b732	99	gpa_t mmio_phys_addr;
34c16eec	100	#endif
1165f5fe	101
d657a98e ZX	102	struct kvm_vcpu_arch arch;
	103	};
	104
6aa8b732 AK	105	struct kvm_memory_slot {
	106	gfn_t base_gfn;
	107	unsigned long npages;
	108	unsigned long flags;
290fc38d	109	unsigned long *rmap;
6aa8b732	110	unsigned long *dirty_bitmap;
05da4558 MT	111	struct {
	112	unsigned long rmap_pde;
	113	int write_count;
ec04b260	114	} *lpage_info[KVM_NR_PAGE_SIZES - 1];
8a7ae055	115	unsigned long userspace_addr;
80b14b5b	116	int user_alloc;
6aa8b732 AK	117	};
6aa8b732 AK	118
399ec807 AK	119	struct kvm_kernel_irq_routing_entry {
399ec807 AK	120	u32 gsi;
5116d8f6	121	u32 type;
4925663a	122	int (set)(struct kvm_kernel_irq_routing_entry e,
1a6e4a8c	123	struct kvm *kvm, int irq_source_id, int level);
399ec807 AK	124	union {
	125	struct {
	126	unsigned irqchip;
	127	unsigned pin;
	128	} irqchip;
79950e10	129	struct msi_msg msi;
399ec807	130	};
46e624b9 GN	131	struct hlist_node link;
	132	};
	133
3e71f88b GN	134	#ifdef __KVM_HAVE_IOAPIC
3e71f88b GN	135
46e624b9	136	struct kvm_irq_routing_table {
3e71f88b	137	int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
46e624b9 GN	138	struct kvm_kernel_irq_routing_entry *rt_entries;
	139	u32 nr_rt_entries;
	140	/*
	141	* Array indexed by gsi. Each entry contains list of irq chips
	142	* the gsi is connected to.
	143	*/
	144	struct hlist_head map[0];
399ec807 AK	145	};
399ec807 AK	146
3e71f88b GN	147	#else
	148
	149	struct kvm_irq_routing_table {};
	150
	151	#endif
	152
6aa8b732	153	struct kvm {
aaee2c94	154	spinlock_t mmu_lock;
84261923	155	spinlock_t requests_lock;
72dc67a6	156	struct rw_semaphore slots_lock;
6d4e4c4f	157	struct mm_struct mm; / userspace tied to this vm */
6aa8b732	158	int nmemslots;
e0d62c7f IE	159	struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
e0d62c7f IE	160	KVM_PRIVATE_MEM_SLOTS];
73880c80 GN	161	#ifdef CONFIG_KVM_APIC_ARCHITECTURE
73880c80 GN	162	u32 bsp_vcpu_id;
c5af89b6	163	struct kvm_vcpu *bsp_vcpu;
73880c80	164	#endif
fb3f0f51	165	struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
73880c80	166	atomic_t online_vcpus;
133de902	167	struct list_head vm_list;
60eead79	168	struct mutex lock;
2eeb2e94	169	struct kvm_io_bus mmio_bus;
74906345	170	struct kvm_io_bus pio_bus;
721eecbf GH	171	#ifdef CONFIG_HAVE_KVM_EVENTFD
	172	struct {
	173	spinlock_t lock;
	174	struct list_head items;
	175	} irqfds;
d34e6b17	176	struct list_head ioeventfds;
721eecbf	177	#endif
ba1389b7	178	struct kvm_vm_stat stat;
d69fb81f	179	struct kvm_arch arch;
d39f13b0	180	atomic_t users_count;
5f94c174 LV	181	#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
	182	struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
	183	struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
	184	#endif
e930bffe	185
60eead79	186	struct mutex irq_lock;
75858a84	187	#ifdef CONFIG_HAVE_KVM_IRQCHIP
46e624b9	188	struct kvm_irq_routing_table *irq_routing;
75858a84 AK	189	struct hlist_head mask_notifier_list;
	190	#endif
	191
e930bffe AA	192	#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
	193	struct mmu_notifier mmu_notifier;
	194	unsigned long mmu_notifier_seq;
	195	long mmu_notifier_count;
	196	#endif
6aa8b732 AK	197	};
6aa8b732 AK	198
f0242478 RR	199	/* The guest did something we don't support. */
	200	#define pr_unimpl(vcpu, fmt, ...) \
	201	do { \
	202	if (printk_ratelimit()) \
	203	printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
	204	current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
d77c26fc	205	} while (0)
f0242478	206
6aa8b732 AK	207	#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
	208	#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
	209
988a2cae GN	210	static inline struct kvm_vcpu kvm_get_vcpu(struct kvm kvm, int i)
	211	{
	212	smp_rmb();
	213	return kvm->vcpus[i];
	214	}
	215
	216	#define kvm_for_each_vcpu(idx, vcpup, kvm) \
	217	for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
	218	idx < atomic_read(&kvm->online_vcpus) && vcpup; \
	219	vcpup = kvm_get_vcpu(kvm, ++idx))
	220
fb3f0f51 RR	221	int kvm_vcpu_init(struct kvm_vcpu vcpu, struct kvm kvm, unsigned id);
	222	void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
	223
313a3dc7 CO	224	void vcpu_load(struct kvm_vcpu *vcpu);
	225	void vcpu_put(struct kvm_vcpu *vcpu);
	226
f8c16bba	227	int kvm_init(void *opaque, unsigned int vcpu_size,
c16f862d	228	struct module *module);
cb498ea2	229	void kvm_exit(void);
6aa8b732	230
d39f13b0 IE	231	void kvm_get_kvm(struct kvm *kvm);
	232	void kvm_put_kvm(struct kvm *kvm);
	233
6aa8b732 AK	234	#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
	235	#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
	236	static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
039576c0	237	struct page gva_to_page(struct kvm_vcpu vcpu, gva_t gva);
6aa8b732	238
cea7bb21	239	extern struct page *bad_page;
35149e21	240	extern pfn_t bad_pfn;
6aa8b732	241
cea7bb21	242	int is_error_page(struct page *page);
35149e21	243	int is_error_pfn(pfn_t pfn);
f9d46eb0	244	int kvm_is_error_hva(unsigned long addr);
210c7c4d IE	245	int kvm_set_memory_region(struct kvm *kvm,
	246	struct kvm_userspace_memory_region *mem,
	247	int user_alloc);
f78e0e2e SY	248	int __kvm_set_memory_region(struct kvm *kvm,
	249	struct kvm_userspace_memory_region *mem,
	250	int user_alloc);
0de10343 ZX	251	int kvm_arch_set_memory_region(struct kvm *kvm,
	252	struct kvm_userspace_memory_region *mem,
	253	struct kvm_memory_slot old,
	254	int user_alloc);
54dee993	255	void kvm_disable_largepages(void);
34d4cb8f	256	void kvm_arch_flush_shadow(struct kvm *kvm);
290fc38d	257	gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
954bbbc2	258	struct page gfn_to_page(struct kvm kvm, gfn_t gfn);
05da4558	259	unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
b4231d61 IE	260	void kvm_release_page_clean(struct page *page);
b4231d61 IE	261	void kvm_release_page_dirty(struct page *page);
35149e21 AL	262	void kvm_set_page_dirty(struct page *page);
	263	void kvm_set_page_accessed(struct page *page);
	264
	265	pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
	266	void kvm_release_pfn_dirty(pfn_t);
	267	void kvm_release_pfn_clean(pfn_t pfn);
	268	void kvm_set_pfn_dirty(pfn_t pfn);
	269	void kvm_set_pfn_accessed(pfn_t pfn);
	270	void kvm_get_pfn(pfn_t pfn);
	271
195aefde IE	272	int kvm_read_guest_page(struct kvm kvm, gfn_t gfn, void data, int offset,
195aefde IE	273	int len);
7ec54588 MT	274	int kvm_read_guest_atomic(struct kvm kvm, gpa_t gpa, void data,
7ec54588 MT	275	unsigned long len);
195aefde IE	276	int kvm_read_guest(struct kvm kvm, gpa_t gpa, void data, unsigned long len);
	277	int kvm_write_guest_page(struct kvm kvm, gfn_t gfn, const void data,
	278	int offset, int len);
	279	int kvm_write_guest(struct kvm kvm, gpa_t gpa, const void data,
	280	unsigned long len);
	281	int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
	282	int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
6aa8b732	283	struct kvm_memory_slot gfn_to_memslot(struct kvm kvm, gfn_t gfn);
e0d62c7f	284	int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
6aa8b732 AK	285	void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
6aa8b732 AK	286
8776e519	287	void kvm_vcpu_block(struct kvm_vcpu *vcpu);
6aa8b732	288	void kvm_resched(struct kvm_vcpu *vcpu);
7702fd1f AK	289	void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
7702fd1f AK	290	void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
d9e368d6	291	void kvm_flush_remote_tlbs(struct kvm *kvm);
2e53d63a	292	void kvm_reload_remote_mmus(struct kvm *kvm);
6aa8b732	293
043405e1 CO	294	long kvm_arch_dev_ioctl(struct file *filp,
043405e1 CO	295	unsigned int ioctl, unsigned long arg);
313a3dc7 CO	296	long kvm_arch_vcpu_ioctl(struct file *filp,
313a3dc7 CO	297	unsigned int ioctl, unsigned long arg);
018d00d2 ZX	298
	299	int kvm_dev_ioctl_check_extension(long ext);
	300
5bb064dc ZX	301	int kvm_get_dirty_log(struct kvm *kvm,
	302	struct kvm_dirty_log log, int is_dirty);
	303	int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
	304	struct kvm_dirty_log *log);
	305
1fe779f8 CO	306	int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
	307	struct
	308	kvm_userspace_memory_region *mem,
	309	int user_alloc);
	310	long kvm_arch_vm_ioctl(struct file *filp,
	311	unsigned int ioctl, unsigned long arg);
313a3dc7	312
d0752060 HB	313	int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu vcpu, struct kvm_fpu fpu);
	314	int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu vcpu, struct kvm_fpu fpu);
	315
8b006791 ZX	316	int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
	317	struct kvm_translation *tr);
	318
b6c7a5dc HB	319	int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu vcpu, struct kvm_regs regs);
	320	int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu vcpu, struct kvm_regs regs);
	321	int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
	322	struct kvm_sregs *sregs);
	323	int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
	324	struct kvm_sregs *sregs);
62d9f0db MT	325	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	326	struct kvm_mp_state *mp_state);
	327	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	328	struct kvm_mp_state *mp_state);
d0bfb940 JK	329	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
d0bfb940 JK	330	struct kvm_guest_debug *dbg);
b6c7a5dc HB	331	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run kvm_run);
b6c7a5dc HB	332
f8c16bba ZX	333	int kvm_arch_init(void *opaque);
f8c16bba ZX	334	void kvm_arch_exit(void);
043405e1	335
e9b11c17 ZX	336	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
	337	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
	338
	339	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
	340	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
	341	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
	342	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id);
26e5215f	343	int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
d40ccc62	344	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
e9b11c17 ZX	345
	346	int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
	347	void kvm_arch_hardware_enable(void *garbage);
	348	void kvm_arch_hardware_disable(void *garbage);
	349	int kvm_arch_hardware_setup(void);
	350	void kvm_arch_hardware_unsetup(void);
	351	void kvm_arch_check_processor_compat(void *rtn);
1d737c8a	352	int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
e9b11c17	353
d19a9cd2 ZX	354	void kvm_free_physmem(struct kvm *kvm);
	355
	356	struct kvm *kvm_arch_create_vm(void);
	357	void kvm_arch_destroy_vm(struct kvm *kvm);
8a98f664	358	void kvm_free_all_assigned_devices(struct kvm *kvm);
ad8ba2cd	359	void kvm_arch_sync_events(struct kvm *kvm);
e9b11c17	360
3d80840d	361	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
5736199a	362	void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
682c59a3	363
c77fb9dc XZ	364	int kvm_is_mmio_pfn(pfn_t pfn);
c77fb9dc XZ	365
62c476c7 BAY	366	struct kvm_irq_ack_notifier {
	367	struct hlist_node link;
	368	unsigned gsi;
	369	void (irq_acked)(struct kvm_irq_ack_notifier kian);
	370	};
	371
2350bd1f	372	#define KVM_ASSIGNED_MSIX_PENDING 0x1
c1e01514 SY	373	struct kvm_guest_msix_entry {
	374	u32 vector;
	375	u16 entry;
	376	u16 flags;
	377	};
	378
62c476c7 BAY	379	struct kvm_assigned_dev_kernel {
	380	struct kvm_irq_ack_notifier ack_notifier;
	381	struct work_struct interrupt_work;
	382	struct list_head list;
	383	int assigned_dev_id;
	384	int host_busnr;
	385	int host_devfn;
c1e01514	386	unsigned int entries_nr;
62c476c7	387	int host_irq;
defaf158	388	bool host_irq_disabled;
c1e01514	389	struct msix_entry *host_msix_entries;
62c476c7	390	int guest_irq;
c1e01514	391	struct kvm_guest_msix_entry *guest_msix_entries;
4f906c19	392	unsigned long irq_requested_type;
5550af4d	393	int irq_source_id;
b653574a	394	int flags;
62c476c7 BAY	395	struct pci_dev *dev;
62c476c7 BAY	396	struct kvm *kvm;
547de29e	397	spinlock_t assigned_dev_lock;
62c476c7	398	};
75858a84 AK	399
	400	struct kvm_irq_mask_notifier {
	401	void (func)(struct kvm_irq_mask_notifier kimn, bool masked);
	402	int irq;
	403	struct hlist_node link;
	404	};
	405
	406	void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
	407	struct kvm_irq_mask_notifier *kimn);
	408	void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
	409	struct kvm_irq_mask_notifier *kimn);
	410	void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
	411
46e624b9 GN	412	#ifdef __KVM_HAVE_IOAPIC
	413	void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
	414	union kvm_ioapic_redirect_entry *entry,
	415	unsigned long *deliver_bitmask);
	416	#endif
	417	int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
44882eed	418	void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
3de42dc0 XZ	419	void kvm_register_irq_ack_notifier(struct kvm *kvm,
3de42dc0 XZ	420	struct kvm_irq_ack_notifier *kian);
fa40a821 MT	421	void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
fa40a821 MT	422	struct kvm_irq_ack_notifier *kian);
5550af4d SY	423	int kvm_request_irq_source_id(struct kvm *kvm);
5550af4d SY	424	void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
62c476c7	425
522c68c4 SY	426	/* For vcpu->arch.iommu_flags */
	427	#define KVM_IOMMU_CACHE_COHERENCY 0x1
	428
19de40a8	429	#ifdef CONFIG_IOMMU_API
62c476c7 BAY	430	int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
62c476c7 BAY	431	unsigned long npages);
260782bc	432	int kvm_iommu_map_guest(struct kvm *kvm);
62c476c7	433	int kvm_iommu_unmap_guest(struct kvm *kvm);
260782bc WH	434	int kvm_assign_device(struct kvm *kvm,
260782bc WH	435	struct kvm_assigned_dev_kernel *assigned_dev);
0a920356 WH	436	int kvm_deassign_device(struct kvm *kvm,
0a920356 WH	437	struct kvm_assigned_dev_kernel *assigned_dev);
19de40a8	438	#else /* CONFIG_IOMMU_API */
62c476c7 BAY	439	static inline int kvm_iommu_map_pages(struct kvm *kvm,
	440	gfn_t base_gfn,
	441	unsigned long npages)
	442	{
	443	return 0;
	444	}
	445
260782bc	446	static inline int kvm_iommu_map_guest(struct kvm *kvm)
62c476c7 BAY	447	{
	448	return -ENODEV;
	449	}
	450
	451	static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
	452	{
	453	return 0;
	454	}
260782bc WH	455
	456	static inline int kvm_assign_device(struct kvm *kvm,
	457	struct kvm_assigned_dev_kernel *assigned_dev)
	458	{
	459	return 0;
	460	}
0a920356 WH	461
	462	static inline int kvm_deassign_device(struct kvm *kvm,
	463	struct kvm_assigned_dev_kernel *assigned_dev)
	464	{
	465	return 0;
	466	}
19de40a8	467	#endif /* CONFIG_IOMMU_API */
62c476c7	468
d172fcd3 LV	469	static inline void kvm_guest_enter(void)
d172fcd3 LV	470	{
e56a7a28	471	account_system_vtime(current);
d172fcd3 LV	472	current->flags \|= PF_VCPU;
	473	}
	474
	475	static inline void kvm_guest_exit(void)
	476	{
e56a7a28	477	account_system_vtime(current);
d172fcd3 LV	478	current->flags &= ~PF_VCPU;
	479	}
	480
6aa8b732 AK	481	static inline int memslot_id(struct kvm kvm, struct kvm_memory_slot slot)
	482	{
	483	return slot - kvm->memslots;
	484	}
	485
1755fbcc AK	486	static inline gpa_t gfn_to_gpa(gfn_t gfn)
	487	{
	488	return (gpa_t)gfn << PAGE_SHIFT;
	489	}
6aa8b732	490
62c476c7 BAY	491	static inline hpa_t pfn_to_hpa(pfn_t pfn)
	492	{
	493	return (hpa_t)pfn << PAGE_SHIFT;
	494	}
	495
2f599714	496	static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
2f52d58c AK	497	{
	498	set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
	499	}
	500
ba1389b7 AK	501	enum kvm_stat_kind {
	502	KVM_STAT_VM,
	503	KVM_STAT_VCPU,
	504	};
	505
417bc304 HB	506	struct kvm_stats_debugfs_item {
	507	const char *name;
	508	int offset;
ba1389b7	509	enum kvm_stat_kind kind;
417bc304 HB	510	struct dentry *dentry;
	511	};
	512	extern struct kvm_stats_debugfs_item debugfs_entries[];
76f7c879	513	extern struct dentry *kvm_debugfs_dir;
d4c9ff2d	514
e930bffe AA	515	#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
	516	static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
	517	{
	518	if (unlikely(vcpu->kvm->mmu_notifier_count))
	519	return 1;
	520	/*
	521	* Both reads happen under the mmu_lock and both values are
	522	* modified under mmu_lock, so there's no need of smb_rmb()
	523	* here in between, otherwise mmu_notifier_count should be
	524	* read before mmu_notifier_seq, see
	525	* mmu_notifier_invalidate_range_end write side.
	526	*/
	527	if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
	528	return 1;
	529	return 0;
	530	}
	531	#endif
	532
399ec807 AK	533	#ifdef CONFIG_HAVE_KVM_IRQCHIP
	534
	535	#define KVM_MAX_IRQ_ROUTES 1024
	536
	537	int kvm_setup_default_irq_routing(struct kvm *kvm);
	538	int kvm_set_irq_routing(struct kvm *kvm,
	539	const struct kvm_irq_routing_entry *entries,
	540	unsigned nr,
	541	unsigned flags);
	542	void kvm_free_irq_routing(struct kvm *kvm);
	543
	544	#else
	545
	546	static inline void kvm_free_irq_routing(struct kvm *kvm) {}
	547
	548	#endif
	549
721eecbf GH	550	#ifdef CONFIG_HAVE_KVM_EVENTFD
721eecbf GH	551
d34e6b17	552	void kvm_eventfd_init(struct kvm *kvm);
721eecbf GH	553	int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
721eecbf GH	554	void kvm_irqfd_release(struct kvm *kvm);
d34e6b17	555	int kvm_ioeventfd(struct kvm kvm, struct kvm_ioeventfd args);
721eecbf GH	556
	557	#else
	558
d34e6b17	559	static inline void kvm_eventfd_init(struct kvm *kvm) {}
721eecbf GH	560	static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
	561	{
	562	return -EINVAL;
	563	}
	564
	565	static inline void kvm_irqfd_release(struct kvm *kvm) {}
d34e6b17 GH	566	static inline int kvm_ioeventfd(struct kvm kvm, struct kvm_ioeventfd args)
	567	{
	568	return -ENOSYS;
	569	}
721eecbf GH	570
	571	#endif /* CONFIG_HAVE_KVM_EVENTFD */
	572
73880c80	573	#ifdef CONFIG_KVM_APIC_ARCHITECTURE
c5af89b6 GN	574	static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
c5af89b6 GN	575	{
d3efc8ef	576	return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
c5af89b6	577	}
6aa8b732	578	#endif
73880c80	579	#endif