[deliverable/linux.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_REQ_DEACTIVATE_FPU    10

#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 200
	struct kvm_io_device *devs[NR_IOBUS_DEVS];
};

enum kvm_bus {
	KVM_MMIO_BUS,
	KVM_PIO_BUS,
	KVM_NR_BUSES
};

int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
		     int len, const void *val);
int kvm_io_bus_read(struct kvm *kvm, 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,
			    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_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 srcu_idx;

	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;
};

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

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_memslots {
	int nmemslots;
	struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
					KVM_PRIVATE_MEM_SLOTS];
};

struct kvm {
	spinlock_t mmu_lock;
	raw_spinlock_t requests_lock;
	struct mutex slots_lock;
	struct mm_struct *mm; /* userspace tied to this vm */
	struct kvm_memslots *memslots;
	struct srcu_struct srcu;
#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 *buses[KVM_NR_BUSES];
#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;
	struct hlist_head irq_ack_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_prepare_memory_region(struct kvm *kvm,
				struct kvm_memory_slot *memslot,
				struct kvm_memory_slot old,
				struct kvm_userspace_memory_region *mem,
				int user_alloc);
void kvm_arch_commit_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);
gfn_t unalias_gfn_instantiation(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);
pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
			 struct kvm_memory_slot *slot, gfn_t gfn);
int memslot_id(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);
unsigned long kvm_host_page_size(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_vcpu_on_spin(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);
int 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_segnr;
	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, struct kvm_memory_slot *slot);
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 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

#ifndef KVM_ARCH_HAS_UNALIAS_INSTANTIATION
#define unalias_gfn_instantiation unalias_gfn
#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

#ifdef __KVM_HAVE_DEVICE_ASSIGNMENT

long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
				  unsigned long arg);

#else

static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
						unsigned long arg)
{
	return -ENOTTY;
}

#endif

#endif
Commit	Line	Data
	1	#ifndef __KVM_HOST_H
	2	#define __KVM_HOST_H
	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>
	10	#include <linux/hardirq.h>
	11	#include <linux/list.h>
	12	#include <linux/mutex.h>
	13	#include <linux/spinlock.h>
	14	#include <linux/signal.h>
	15	#include <linux/sched.h>
	16	#include <linux/mm.h>
	17	#include <linux/preempt.h>
	18	#include <linux/msi.h>
	19	#include <asm/signal.h>
	20
	21	#include <linux/kvm.h>
	22	#include <linux/kvm_para.h>
	23
	24	#include <linux/kvm_types.h>
	25
	26	#include <asm/kvm_host.h>
	27
	28	/*
	29	* vcpu->requests bit members
	30	*/
	31	#define KVM_REQ_TLB_FLUSH 0
	32	#define KVM_REQ_MIGRATE_TIMER 1
	33	#define KVM_REQ_REPORT_TPR_ACCESS 2
	34	#define KVM_REQ_MMU_RELOAD 3
	35	#define KVM_REQ_TRIPLE_FAULT 4
	36	#define KVM_REQ_PENDING_TIMER 5
	37	#define KVM_REQ_UNHALT 6
	38	#define KVM_REQ_MMU_SYNC 7
	39	#define KVM_REQ_KVMCLOCK_UPDATE 8
	40	#define KVM_REQ_KICK 9
	41	#define KVM_REQ_DEACTIVATE_FPU 10
	42
	43	#define KVM_USERSPACE_IRQ_SOURCE_ID 0
	44
	45	struct kvm;
	46	struct kvm_vcpu;
	47	extern struct kmem_cache *kvm_vcpu_cache;
	48
	49	/*
	50	* It would be nice to use something smarter than a linear search, TBD...
	51	* Thankfully we dont expect many devices to register (famous last words :),
	52	* so until then it will suffice. At least its abstracted so we can change
	53	* in one place.
	54	*/
	55	struct kvm_io_bus {
	56	int dev_count;
	57	#define NR_IOBUS_DEVS 200
	58	struct kvm_io_device *devs[NR_IOBUS_DEVS];
	59	};
	60
	61	enum kvm_bus {
	62	KVM_MMIO_BUS,
	63	KVM_PIO_BUS,
	64	KVM_NR_BUSES
	65	};
	66
	67	int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
	68	int len, const void *val);
	69	int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
	70	void *val);
	71	int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx,
	72	struct kvm_io_device *dev);
	73	int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
	74	struct kvm_io_device *dev);
	75
	76	struct kvm_vcpu {
	77	struct kvm *kvm;
	78	#ifdef CONFIG_PREEMPT_NOTIFIERS
	79	struct preempt_notifier preempt_notifier;
	80	#endif
	81	int vcpu_id;
	82	struct mutex mutex;
	83	int cpu;
	84	struct kvm_run *run;
	85	unsigned long requests;
	86	unsigned long guest_debug;
	87	int srcu_idx;
	88
	89	int fpu_active;
	90	int guest_fpu_loaded;
	91	wait_queue_head_t wq;
	92	int sigset_active;
	93	sigset_t sigset;
	94	struct kvm_vcpu_stat stat;
	95
	96	#ifdef CONFIG_HAS_IOMEM
	97	int mmio_needed;
	98	int mmio_read_completed;
	99	int mmio_is_write;
	100	int mmio_size;
	101	unsigned char mmio_data[8];
	102	gpa_t mmio_phys_addr;
	103	#endif
	104
	105	struct kvm_vcpu_arch arch;
	106	};
	107
	108	struct kvm_memory_slot {
	109	gfn_t base_gfn;
	110	unsigned long npages;
	111	unsigned long flags;
	112	unsigned long *rmap;
	113	unsigned long *dirty_bitmap;
	114	struct {
	115	unsigned long rmap_pde;
	116	int write_count;
	117	} *lpage_info[KVM_NR_PAGE_SIZES - 1];
	118	unsigned long userspace_addr;
	119	int user_alloc;
	120	};
	121
	122	static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
	123	{
	124	return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
	125	}
	126
	127	struct kvm_kernel_irq_routing_entry {
	128	u32 gsi;
	129	u32 type;
	130	int (set)(struct kvm_kernel_irq_routing_entry e,
	131	struct kvm *kvm, int irq_source_id, int level);
	132	union {
	133	struct {
	134	unsigned irqchip;
	135	unsigned pin;
	136	} irqchip;
	137	struct msi_msg msi;
	138	};
	139	struct hlist_node link;
	140	};
	141
	142	#ifdef __KVM_HAVE_IOAPIC
	143
	144	struct kvm_irq_routing_table {
	145	int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
	146	struct kvm_kernel_irq_routing_entry *rt_entries;
	147	u32 nr_rt_entries;
	148	/*
	149	* Array indexed by gsi. Each entry contains list of irq chips
	150	* the gsi is connected to.
	151	*/
	152	struct hlist_head map[0];
	153	};
	154
	155	#else
	156
	157	struct kvm_irq_routing_table {};
	158
	159	#endif
	160
	161	struct kvm_memslots {
	162	int nmemslots;
	163	struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
	164	KVM_PRIVATE_MEM_SLOTS];
	165	};
	166
	167	struct kvm {
	168	spinlock_t mmu_lock;
	169	raw_spinlock_t requests_lock;
	170	struct mutex slots_lock;
	171	struct mm_struct mm; / userspace tied to this vm */
	172	struct kvm_memslots *memslots;
	173	struct srcu_struct srcu;
	174	#ifdef CONFIG_KVM_APIC_ARCHITECTURE
	175	u32 bsp_vcpu_id;
	176	struct kvm_vcpu *bsp_vcpu;
	177	#endif
	178	struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
	179	atomic_t online_vcpus;
	180	struct list_head vm_list;
	181	struct mutex lock;
	182	struct kvm_io_bus *buses[KVM_NR_BUSES];
	183	#ifdef CONFIG_HAVE_KVM_EVENTFD
	184	struct {
	185	spinlock_t lock;
	186	struct list_head items;
	187	} irqfds;
	188	struct list_head ioeventfds;
	189	#endif
	190	struct kvm_vm_stat stat;
	191	struct kvm_arch arch;
	192	atomic_t users_count;
	193	#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
	194	struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
	195	struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
	196	#endif
	197
	198	struct mutex irq_lock;
	199	#ifdef CONFIG_HAVE_KVM_IRQCHIP
	200	struct kvm_irq_routing_table *irq_routing;
	201	struct hlist_head mask_notifier_list;
	202	struct hlist_head irq_ack_notifier_list;
	203	#endif
	204
	205	#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
	206	struct mmu_notifier mmu_notifier;
	207	unsigned long mmu_notifier_seq;
	208	long mmu_notifier_count;
	209	#endif
	210	};
	211
	212	/* The guest did something we don't support. */
	213	#define pr_unimpl(vcpu, fmt, ...) \
	214	do { \
	215	if (printk_ratelimit()) \
	216	printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
	217	current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
	218	} while (0)
	219
	220	#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
	221	#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
	222
	223	static inline struct kvm_vcpu kvm_get_vcpu(struct kvm kvm, int i)
	224	{
	225	smp_rmb();
	226	return kvm->vcpus[i];
	227	}
	228
	229	#define kvm_for_each_vcpu(idx, vcpup, kvm) \
	230	for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
	231	idx < atomic_read(&kvm->online_vcpus) && vcpup; \
	232	vcpup = kvm_get_vcpu(kvm, ++idx))
	233
	234	int kvm_vcpu_init(struct kvm_vcpu vcpu, struct kvm kvm, unsigned id);
	235	void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
	236
	237	void vcpu_load(struct kvm_vcpu *vcpu);
	238	void vcpu_put(struct kvm_vcpu *vcpu);
	239
	240	int kvm_init(void *opaque, unsigned int vcpu_size,
	241	struct module *module);
	242	void kvm_exit(void);
	243
	244	void kvm_get_kvm(struct kvm *kvm);
	245	void kvm_put_kvm(struct kvm *kvm);
	246
	247	#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
	248	#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
	249	static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
	250	struct page gva_to_page(struct kvm_vcpu vcpu, gva_t gva);
	251
	252	extern struct page *bad_page;
	253	extern pfn_t bad_pfn;
	254
	255	int is_error_page(struct page *page);
	256	int is_error_pfn(pfn_t pfn);
	257	int kvm_is_error_hva(unsigned long addr);
	258	int kvm_set_memory_region(struct kvm *kvm,
	259	struct kvm_userspace_memory_region *mem,
	260	int user_alloc);
	261	int __kvm_set_memory_region(struct kvm *kvm,
	262	struct kvm_userspace_memory_region *mem,
	263	int user_alloc);
	264	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	265	struct kvm_memory_slot *memslot,
	266	struct kvm_memory_slot old,
	267	struct kvm_userspace_memory_region *mem,
	268	int user_alloc);
	269	void kvm_arch_commit_memory_region(struct kvm *kvm,
	270	struct kvm_userspace_memory_region *mem,
	271	struct kvm_memory_slot old,
	272	int user_alloc);
	273	void kvm_disable_largepages(void);
	274	void kvm_arch_flush_shadow(struct kvm *kvm);
	275	gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
	276	gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn);
	277
	278	struct page gfn_to_page(struct kvm kvm, gfn_t gfn);
	279	unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
	280	void kvm_release_page_clean(struct page *page);
	281	void kvm_release_page_dirty(struct page *page);
	282	void kvm_set_page_dirty(struct page *page);
	283	void kvm_set_page_accessed(struct page *page);
	284
	285	pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
	286	pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
	287	struct kvm_memory_slot *slot, gfn_t gfn);
	288	int memslot_id(struct kvm *kvm, gfn_t gfn);
	289	void kvm_release_pfn_dirty(pfn_t);
	290	void kvm_release_pfn_clean(pfn_t pfn);
	291	void kvm_set_pfn_dirty(pfn_t pfn);
	292	void kvm_set_pfn_accessed(pfn_t pfn);
	293	void kvm_get_pfn(pfn_t pfn);
	294
	295	int kvm_read_guest_page(struct kvm kvm, gfn_t gfn, void data, int offset,
	296	int len);
	297	int kvm_read_guest_atomic(struct kvm kvm, gpa_t gpa, void data,
	298	unsigned long len);
	299	int kvm_read_guest(struct kvm kvm, gpa_t gpa, void data, unsigned long len);
	300	int kvm_write_guest_page(struct kvm kvm, gfn_t gfn, const void data,
	301	int offset, int len);
	302	int kvm_write_guest(struct kvm kvm, gpa_t gpa, const void data,
	303	unsigned long len);
	304	int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
	305	int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
	306	struct kvm_memory_slot gfn_to_memslot(struct kvm kvm, gfn_t gfn);
	307	int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
	308	unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
	309	void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
	310
	311	void kvm_vcpu_block(struct kvm_vcpu *vcpu);
	312	void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
	313	void kvm_resched(struct kvm_vcpu *vcpu);
	314	void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
	315	void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
	316	void kvm_flush_remote_tlbs(struct kvm *kvm);
	317	void kvm_reload_remote_mmus(struct kvm *kvm);
	318
	319	long kvm_arch_dev_ioctl(struct file *filp,
	320	unsigned int ioctl, unsigned long arg);
	321	long kvm_arch_vcpu_ioctl(struct file *filp,
	322	unsigned int ioctl, unsigned long arg);
	323
	324	int kvm_dev_ioctl_check_extension(long ext);
	325
	326	int kvm_get_dirty_log(struct kvm *kvm,
	327	struct kvm_dirty_log log, int is_dirty);
	328	int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
	329	struct kvm_dirty_log *log);
	330
	331	int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
	332	struct
	333	kvm_userspace_memory_region *mem,
	334	int user_alloc);
	335	long kvm_arch_vm_ioctl(struct file *filp,
	336	unsigned int ioctl, unsigned long arg);
	337
	338	int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu vcpu, struct kvm_fpu fpu);
	339	int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu vcpu, struct kvm_fpu fpu);
	340
	341	int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
	342	struct kvm_translation *tr);
	343
	344	int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu vcpu, struct kvm_regs regs);
	345	int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu vcpu, struct kvm_regs regs);
	346	int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
	347	struct kvm_sregs *sregs);
	348	int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
	349	struct kvm_sregs *sregs);
	350	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	351	struct kvm_mp_state *mp_state);
	352	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	353	struct kvm_mp_state *mp_state);
	354	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
	355	struct kvm_guest_debug *dbg);
	356	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run kvm_run);
	357
	358	int kvm_arch_init(void *opaque);
	359	void kvm_arch_exit(void);
	360
	361	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
	362	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
	363
	364	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
	365	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
	366	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
	367	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id);
	368	int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
	369	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
	370
	371	int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
	372	int kvm_arch_hardware_enable(void *garbage);
	373	void kvm_arch_hardware_disable(void *garbage);
	374	int kvm_arch_hardware_setup(void);
	375	void kvm_arch_hardware_unsetup(void);
	376	void kvm_arch_check_processor_compat(void *rtn);
	377	int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
	378
	379	void kvm_free_physmem(struct kvm *kvm);
	380
	381	struct kvm *kvm_arch_create_vm(void);
	382	void kvm_arch_destroy_vm(struct kvm *kvm);
	383	void kvm_free_all_assigned_devices(struct kvm *kvm);
	384	void kvm_arch_sync_events(struct kvm *kvm);
	385
	386	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
	387	void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
	388
	389	int kvm_is_mmio_pfn(pfn_t pfn);
	390
	391	struct kvm_irq_ack_notifier {
	392	struct hlist_node link;
	393	unsigned gsi;
	394	void (irq_acked)(struct kvm_irq_ack_notifier kian);
	395	};
	396
	397	#define KVM_ASSIGNED_MSIX_PENDING 0x1
	398	struct kvm_guest_msix_entry {
	399	u32 vector;
	400	u16 entry;
	401	u16 flags;
	402	};
	403
	404	struct kvm_assigned_dev_kernel {
	405	struct kvm_irq_ack_notifier ack_notifier;
	406	struct work_struct interrupt_work;
	407	struct list_head list;
	408	int assigned_dev_id;
	409	int host_segnr;
	410	int host_busnr;
	411	int host_devfn;
	412	unsigned int entries_nr;
	413	int host_irq;
	414	bool host_irq_disabled;
	415	struct msix_entry *host_msix_entries;
	416	int guest_irq;
	417	struct kvm_guest_msix_entry *guest_msix_entries;
	418	unsigned long irq_requested_type;
	419	int irq_source_id;
	420	int flags;
	421	struct pci_dev *dev;
	422	struct kvm *kvm;
	423	spinlock_t assigned_dev_lock;
	424	};
	425
	426	struct kvm_irq_mask_notifier {
	427	void (func)(struct kvm_irq_mask_notifier kimn, bool masked);
	428	int irq;
	429	struct hlist_node link;
	430	};
	431
	432	void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
	433	struct kvm_irq_mask_notifier *kimn);
	434	void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
	435	struct kvm_irq_mask_notifier *kimn);
	436	void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
	437
	438	#ifdef __KVM_HAVE_IOAPIC
	439	void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
	440	union kvm_ioapic_redirect_entry *entry,
	441	unsigned long *deliver_bitmask);
	442	#endif
	443	int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
	444	void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
	445	void kvm_register_irq_ack_notifier(struct kvm *kvm,
	446	struct kvm_irq_ack_notifier *kian);
	447	void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
	448	struct kvm_irq_ack_notifier *kian);
	449	int kvm_request_irq_source_id(struct kvm *kvm);
	450	void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
	451
	452	/* For vcpu->arch.iommu_flags */
	453	#define KVM_IOMMU_CACHE_COHERENCY 0x1
	454
	455	#ifdef CONFIG_IOMMU_API
	456	int kvm_iommu_map_pages(struct kvm kvm, struct kvm_memory_slot slot);
	457	int kvm_iommu_map_guest(struct kvm *kvm);
	458	int kvm_iommu_unmap_guest(struct kvm *kvm);
	459	int kvm_assign_device(struct kvm *kvm,
	460	struct kvm_assigned_dev_kernel *assigned_dev);
	461	int kvm_deassign_device(struct kvm *kvm,
	462	struct kvm_assigned_dev_kernel *assigned_dev);
	463	#else /* CONFIG_IOMMU_API */
	464	static inline int kvm_iommu_map_pages(struct kvm *kvm,
	465	gfn_t base_gfn,
	466	unsigned long npages)
	467	{
	468	return 0;
	469	}
	470
	471	static inline int kvm_iommu_map_guest(struct kvm *kvm)
	472	{
	473	return -ENODEV;
	474	}
	475
	476	static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
	477	{
	478	return 0;
	479	}
	480
	481	static inline int kvm_assign_device(struct kvm *kvm,
	482	struct kvm_assigned_dev_kernel *assigned_dev)
	483	{
	484	return 0;
	485	}
	486
	487	static inline int kvm_deassign_device(struct kvm *kvm,
	488	struct kvm_assigned_dev_kernel *assigned_dev)
	489	{
	490	return 0;
	491	}
	492	#endif /* CONFIG_IOMMU_API */
	493
	494	static inline void kvm_guest_enter(void)
	495	{
	496	account_system_vtime(current);
	497	current->flags \|= PF_VCPU;
	498	}
	499
	500	static inline void kvm_guest_exit(void)
	501	{
	502	account_system_vtime(current);
	503	current->flags &= ~PF_VCPU;
	504	}
	505
	506	static inline gpa_t gfn_to_gpa(gfn_t gfn)
	507	{
	508	return (gpa_t)gfn << PAGE_SHIFT;
	509	}
	510
	511	static inline hpa_t pfn_to_hpa(pfn_t pfn)
	512	{
	513	return (hpa_t)pfn << PAGE_SHIFT;
	514	}
	515
	516	static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
	517	{
	518	set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
	519	}
	520
	521	enum kvm_stat_kind {
	522	KVM_STAT_VM,
	523	KVM_STAT_VCPU,
	524	};
	525
	526	struct kvm_stats_debugfs_item {
	527	const char *name;
	528	int offset;
	529	enum kvm_stat_kind kind;
	530	struct dentry *dentry;
	531	};
	532	extern struct kvm_stats_debugfs_item debugfs_entries[];
	533	extern struct dentry *kvm_debugfs_dir;
	534
	535	#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
	536	static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
	537	{
	538	if (unlikely(vcpu->kvm->mmu_notifier_count))
	539	return 1;
	540	/*
	541	* Both reads happen under the mmu_lock and both values are
	542	* modified under mmu_lock, so there's no need of smb_rmb()
	543	* here in between, otherwise mmu_notifier_count should be
	544	* read before mmu_notifier_seq, see
	545	* mmu_notifier_invalidate_range_end write side.
	546	*/
	547	if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
	548	return 1;
	549	return 0;
	550	}
	551	#endif
	552
	553	#ifndef KVM_ARCH_HAS_UNALIAS_INSTANTIATION
	554	#define unalias_gfn_instantiation unalias_gfn
	555	#endif
	556
	557	#ifdef CONFIG_HAVE_KVM_IRQCHIP
	558
	559	#define KVM_MAX_IRQ_ROUTES 1024
	560
	561	int kvm_setup_default_irq_routing(struct kvm *kvm);
	562	int kvm_set_irq_routing(struct kvm *kvm,
	563	const struct kvm_irq_routing_entry *entries,
	564	unsigned nr,
	565	unsigned flags);
	566	void kvm_free_irq_routing(struct kvm *kvm);
	567
	568	#else
	569
	570	static inline void kvm_free_irq_routing(struct kvm *kvm) {}
	571
	572	#endif
	573
	574	#ifdef CONFIG_HAVE_KVM_EVENTFD
	575
	576	void kvm_eventfd_init(struct kvm *kvm);
	577	int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
	578	void kvm_irqfd_release(struct kvm *kvm);
	579	int kvm_ioeventfd(struct kvm kvm, struct kvm_ioeventfd args);
	580
	581	#else
	582
	583	static inline void kvm_eventfd_init(struct kvm *kvm) {}
	584	static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
	585	{
	586	return -EINVAL;
	587	}
	588
	589	static inline void kvm_irqfd_release(struct kvm *kvm) {}
	590	static inline int kvm_ioeventfd(struct kvm kvm, struct kvm_ioeventfd args)
	591	{
	592	return -ENOSYS;
	593	}
	594
	595	#endif /* CONFIG_HAVE_KVM_EVENTFD */
	596
	597	#ifdef CONFIG_KVM_APIC_ARCHITECTURE
	598	static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
	599	{
	600	return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
	601	}
	602	#endif
	603
	604	#ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
	605
	606	long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
	607	unsigned long arg);
	608
	609	#else
	610
	611	static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
	612	unsigned long arg)
	613	{
	614	return -ENOTTY;
	615	}
	616
	617	#endif
	618
	619	#endif
	620