[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/marker.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);
void __kvm_io_bus_register_dev(struct kvm_io_bus *bus,
			       struct kvm_io_device *dev);
void kvm_io_bus_register_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 level);
	union {
		struct {
			unsigned irqchip;
			unsigned pin;
		} irqchip;
		struct msi_msg msi;
	};
	struct list_head link;
};

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;
#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 list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
	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);
int kvm_arch_interrupt_allowed(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_get_interrupt(struct kvm_vcpu *v);
int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
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);

int kvm_set_irq(struct kvm *kvm, int irq_source_id, int 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_irqfd_init(struct kvm *kvm);
int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
void kvm_irqfd_release(struct kvm *kvm);

#else

static inline void kvm_irqfd_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) {}

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