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#ifndef __KVM_H

#define __KVM_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/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 <asm/signal.h>

#include <linux/kvm.h>

#include <linux/kvm_para.h>

#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)

#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))

#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)

#define KVM_GUEST_CR0_MASK \

        (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \

         | X86_CR0_NW | X86_CR0_CD)

#define KVM_VM_CR0_ALWAYS_ON \

        (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \

         | X86_CR0_MP)

#define KVM_GUEST_CR4_MASK \

        (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)

#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)

#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)

#define INVALID_PAGE (~(hpa_t)0)

#define UNMAPPED_GVA (~(gpa_t)0)

#define KVM_MAX_VCPUS 4

#define KVM_ALIAS_SLOTS 4

#define KVM_MEMORY_SLOTS 8

#define KVM_NUM_MMU_PAGES 1024

#define KVM_MIN_FREE_MMU_PAGES 5

#define KVM_REFILL_PAGES 25

#define KVM_MAX_CPUID_ENTRIES 40

#define DE_VECTOR 0

#define NM_VECTOR 7

#define DF_VECTOR 8

#define TS_VECTOR 10

#define NP_VECTOR 11

#define SS_VECTOR 12

#define GP_VECTOR 13

#define PF_VECTOR 14

#define SELECTOR_TI_MASK (1 << 2)

#define SELECTOR_RPL_MASK 0x03

#define IOPL_SHIFT 12

#define KVM_PIO_PAGE_OFFSET 1

/*

 * vcpu->requests bit members

 */

#define KVM_TLB_FLUSH 0

/*

 * Address types:

 *

 *  gva - guest virtual address

 *  gpa - guest physical address

 *  gfn - guest frame number

 *  hva - host virtual address

 *  hpa - host physical address

 *  hfn - host frame number

 */

typedef unsigned long  gva_t;

typedef u64            gpa_t;

typedef unsigned long  gfn_t;

typedef unsigned long  hva_t;

typedef u64            hpa_t;

typedef unsigned long  hfn_t;

#define NR_PTE_CHAIN_ENTRIES 5

struct kvm_pte_chain {

        u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];

        struct hlist_node link;

};

/*

 * kvm_mmu_page_role, below, is defined as:

 *

 *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)

 *   bits 4:7 - page table level for this shadow (1-4)

 *   bits 8:9 - page table quadrant for 2-level guests

 *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)

 *   bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde

 */

union kvm_mmu_page_role {

        unsigned word;

        struct {

                unsigned glevels : 4;

                unsigned level : 4;

                unsigned quadrant : 2;

                unsigned pad_for_nice_hex_output : 6;

                unsigned metaphysical : 1;

                unsigned hugepage_access : 3;

        };

};

struct kvm_mmu_page {

        struct list_head link;

        struct hlist_node hash_link;

        /*

         * The following two entries are used to key the shadow page in the

         * hash table.

         */

        gfn_t gfn;

        union kvm_mmu_page_role role;

        u64 *spt;

        unsigned long slot_bitmap; /* One bit set per slot which has memory

                                    * in this shadow page.

                                    */

        int multimapped;         /* More than one parent_pte? */

        int root_count;          /* Currently serving as active root */

        union {

                u64 *parent_pte;               /* !multimapped */

                struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */

        };

};

struct kvm_vcpu;

extern struct kmem_cache *kvm_vcpu_cache;

/*

 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level

 * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu

 * mode.

 */

struct kvm_mmu {

        void (*new_cr3)(struct kvm_vcpu *vcpu);

        int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);

        void (*free)(struct kvm_vcpu *vcpu);

        gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);

        hpa_t root_hpa;

        int root_level;

        int shadow_root_level;

        u64 *pae_root;

};

#define KVM_NR_MEM_OBJS 20

struct kvm_mmu_memory_cache {

        int nobjs;

        void *objects[KVM_NR_MEM_OBJS];

};

/*

 * We don't want allocation failures within the mmu code, so we preallocate

 * enough memory for a single page fault in a cache.

 */

struct kvm_guest_debug {

        int enabled;

        unsigned long bp[4];

        int singlestep;

};

enum {

        VCPU_REGS_RAX = 0,

        VCPU_REGS_RCX = 1,

        VCPU_REGS_RDX = 2,

        VCPU_REGS_RBX = 3,

        VCPU_REGS_RSP = 4,

        VCPU_REGS_RBP = 5,

        VCPU_REGS_RSI = 6,

        VCPU_REGS_RDI = 7,

#ifdef CONFIG_X86_64

        VCPU_REGS_R8 = 8,

        VCPU_REGS_R9 = 9,

        VCPU_REGS_R10 = 10,

        VCPU_REGS_R11 = 11,

        VCPU_REGS_R12 = 12,

        VCPU_REGS_R13 = 13,

        VCPU_REGS_R14 = 14,

        VCPU_REGS_R15 = 15,

#endif

        NR_VCPU_REGS

};

enum {

        VCPU_SREG_CS,

        VCPU_SREG_DS,

        VCPU_SREG_ES,

        VCPU_SREG_FS,

        VCPU_SREG_GS,

        VCPU_SREG_SS,

        VCPU_SREG_TR,

        VCPU_SREG_LDTR,

};

struct kvm_pio_request {

        unsigned long count;

        int cur_count;

        struct page *guest_pages[2];

        unsigned guest_page_offset;

        int in;

        int port;

        int size;

        int string;

        int down;

        int rep;

};

struct kvm_stat {

        u32 pf_fixed;

        u32 pf_guest;

        u32 tlb_flush;

        u32 invlpg;

        u32 exits;

        u32 io_exits;

        u32 mmio_exits;

        u32 signal_exits;

        u32 irq_window_exits;

        u32 halt_exits;

        u32 halt_wakeup;

        u32 request_irq_exits;

        u32 irq_exits;

        u32 light_exits;

        u32 efer_reload;

};

struct kvm_io_device {

        void (*read)(struct kvm_io_device *this,

                     gpa_t addr,

                     int len,

                     void *val);

        void (*write)(struct kvm_io_device *this,

                      gpa_t addr,

                      int len,

                      const void *val);

        int (*in_range)(struct kvm_io_device *this, gpa_t addr);

        void (*destructor)(struct kvm_io_device *this);

        void             *private;

};

static inline void kvm_iodevice_read(struct kvm_io_device *dev,

                                     gpa_t addr,

                                     int len,

                                     void *val)

{

        dev->read(dev, addr, len, val);

}

static inline void kvm_iodevice_write(struct kvm_io_device *dev,

                                      gpa_t addr,

                                      int len,

                                      const void *val)

{

        dev->write(dev, addr, len, val);

}

static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)

{

        return dev->in_range(dev, addr);

}

static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)

{

        if (dev->destructor)

                dev->destructor(dev);

}

/*

 * 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);

struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);

void kvm_io_bus_register_dev(struct kvm_io_bus *bus,

                             struct kvm_io_device *dev);

struct kvm_vcpu {

        struct kvm *kvm;

        struct preempt_notifier preempt_notifier;

        int vcpu_id;

        struct mutex mutex;

        int   cpu;

        u64 host_tsc;

        struct kvm_run *run;

        int interrupt_window_open;

        int guest_mode;

        unsigned long requests;

        unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */

        DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);

        unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */

        unsigned long rip;      /* needs vcpu_load_rsp_rip() */

        unsigned long cr0;

        unsigned long cr2;

        unsigned long cr3;

        gpa_t para_state_gpa;

        struct page *para_state_page;

        gpa_t hypercall_gpa;

        unsigned long cr4;

        unsigned long cr8;

        u64 pdptrs[4]; /* pae */

        u64 shadow_efer;

        u64 apic_base;

        struct kvm_lapic *apic;    /* kernel irqchip context */

#define VCPU_MP_STATE_RUNNABLE          0

#define VCPU_MP_STATE_UNINITIALIZED     1

#define VCPU_MP_STATE_INIT_RECEIVED     2

#define VCPU_MP_STATE_SIPI_RECEIVED     3

#define VCPU_MP_STATE_HALTED            4

        int mp_state;

        int sipi_vector;

        u64 ia32_misc_enable_msr;

        struct kvm_mmu mmu;

        struct kvm_mmu_memory_cache mmu_pte_chain_cache;

        struct kvm_mmu_memory_cache mmu_rmap_desc_cache;

        struct kvm_mmu_memory_cache mmu_page_cache;

        struct kvm_mmu_memory_cache mmu_page_header_cache;

        gfn_t last_pt_write_gfn;

        int   last_pt_write_count;

        struct kvm_guest_debug guest_debug;

        struct i387_fxsave_struct host_fx_image;

        struct i387_fxsave_struct guest_fx_image;

        int fpu_active;

        int guest_fpu_loaded;

        int mmio_needed;

        int mmio_read_completed;

        int mmio_is_write;

        int mmio_size;

        unsigned char mmio_data[8];

        gpa_t mmio_phys_addr;

        gva_t mmio_fault_cr2;

        struct kvm_pio_request pio;

        void *pio_data;

        wait_queue_head_t wq;

        int sigset_active;

        sigset_t sigset;

        struct kvm_stat stat;

        struct {

                int active;

                u8 save_iopl;

                struct kvm_save_segment {

                        u16 selector;

                        unsigned long base;

                        u32 limit;

                        u32 ar;

                } tr, es, ds, fs, gs;

        } rmode;

        int halt_request; /* real mode on Intel only */

        int cpuid_nent;

        struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];

};

struct kvm_mem_alias {

        gfn_t base_gfn;

        unsigned long npages;

        gfn_t target_gfn;

};

struct kvm_memory_slot {

        gfn_t base_gfn;

        unsigned long npages;

        unsigned long flags;

        struct page **phys_mem;

        unsigned long *dirty_bitmap;

};

struct kvm {

        struct mutex lock; /* protects everything except vcpus */

        int naliases;

        struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];

        int nmemslots;

        struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];

        /*

         * Hash table of struct kvm_mmu_page.

         */

        struct list_head active_mmu_pages;

        int n_free_mmu_pages;

        struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];

        struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];

        unsigned long rmap_overflow;

        struct list_head vm_list;

        struct file *filp;

        struct kvm_io_bus mmio_bus;

        struct kvm_io_bus pio_bus;

        struct kvm_pic *vpic;

        struct kvm_ioapic *vioapic;

        int round_robin_prev_vcpu;

};

static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)

{

        return kvm->vpic;

}

static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)

{

        return kvm->vioapic;

}

static inline int irqchip_in_kernel(struct kvm *kvm)

{

        return pic_irqchip(kvm) != 0;

}

struct descriptor_table {

        u16 limit;

        unsigned long base;

} __attribute__((packed));

struct kvm_x86_ops {

        int (*cpu_has_kvm_support)(void);          /* __init */

        int (*disabled_by_bios)(void);             /* __init */

        void (*hardware_enable)(void *dummy);      /* __init */

        void (*hardware_disable)(void *dummy);

        void (*check_processor_compatibility)(void *rtn);

        int (*hardware_setup)(void);               /* __init */

        void (*hardware_unsetup)(void);            /* __exit */

        /* Create, but do not attach this VCPU */

        struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);

        void (*vcpu_free)(struct kvm_vcpu *vcpu);

        void (*vcpu_reset)(struct kvm_vcpu *vcpu);

        void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);

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

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

        void (*vcpu_decache)(struct kvm_vcpu *vcpu);

        int (*set_guest_debug)(struct kvm_vcpu *vcpu,

                               struct kvm_debug_guest *dbg);

        void (*guest_debug_pre)(struct kvm_vcpu *vcpu);

        int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);

        int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);

        u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);

        void (*get_segment)(struct kvm_vcpu *vcpu,

                            struct kvm_segment *var, int seg);

        void (*set_segment)(struct kvm_vcpu *vcpu,

                            struct kvm_segment *var, int seg);

        void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);

        void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);

        void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);

        void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);

        void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);

        void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);

        void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);

        void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);

        void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);

        void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);

        unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);

        void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,

                       int *exception);

        void (*cache_regs)(struct kvm_vcpu *vcpu);

        void (*decache_regs)(struct kvm_vcpu *vcpu);

        unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);

        void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);

        void (*tlb_flush)(struct kvm_vcpu *vcpu);

        void (*inject_page_fault)(struct kvm_vcpu *vcpu,

                                  unsigned long addr, u32 err_code);

        void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);

        void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);

        int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);

        void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);

        void (*patch_hypercall)(struct kvm_vcpu *vcpu,

                                unsigned char *hypercall_addr);

        int (*get_irq)(struct kvm_vcpu *vcpu);

        void (*set_irq)(struct kvm_vcpu *vcpu, int vec);

        void (*inject_pending_irq)(struct kvm_vcpu *vcpu);

        void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,

                                       struct kvm_run *run);

};

extern struct kvm_x86_ops *kvm_x86_ops;

/* 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)

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

void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);

int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,

                  struct module *module);

void kvm_exit_x86(void);

int kvm_mmu_module_init(void);

void kvm_mmu_module_exit(void);

void kvm_mmu_destroy(struct kvm_vcpu *vcpu);

int kvm_mmu_create(struct kvm_vcpu *vcpu);

int kvm_mmu_setup(struct kvm_vcpu *vcpu);

int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);

void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);

void kvm_mmu_zap_all(struct kvm *kvm);

hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);

#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; }

hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);

struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);

extern hpa_t bad_page_address;

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

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

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

enum emulation_result {

        EMULATE_DONE,       /* no further processing */

        EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */

        EMULATE_FAIL,         /* can't emulate this instruction */

};

int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,

                        unsigned long cr2, u16 error_code);

void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);

void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);

void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);

void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,

                   unsigned long *rflags);

unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);

void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,

                     unsigned long *rflags);

int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);

int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);

struct x86_emulate_ctxt;

int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in,

                     int size, unsigned port);

int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,

                           int size, unsigned long count, int down,

                            gva_t address, int rep, unsigned port);

void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);

int kvm_emulate_halt(struct kvm_vcpu *vcpu);

int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);

int emulate_clts(struct kvm_vcpu *vcpu);

int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,

                    unsigned long *dest);

int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,

                    unsigned long value);

void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);

void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);

void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);

void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);

unsigned long get_cr8(struct kvm_vcpu *vcpu);

void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);

void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);

int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);

int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);

void fx_init(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);

int emulator_read_std(unsigned long addr,

                      void *val,

                      unsigned int bytes,

                      struct kvm_vcpu *vcpu);

int emulator_write_emulated(unsigned long addr,

                            const void *val,

                            unsigned int bytes,

                            struct kvm_vcpu *vcpu);

unsigned long segment_base(u16 selector);

void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,

                       const u8 *new, int bytes);

int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);

void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);

int kvm_mmu_load(struct kvm_vcpu *vcpu);

void kvm_mmu_unload(struct kvm_vcpu *vcpu);

int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);

static inline void kvm_guest_enter(void)

{

        current->flags |= PF_VCPU;

}

static inline void kvm_guest_exit(void)

{

        current->flags &= ~PF_VCPU;

}

static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,

                                     u32 error_code)

{

        return vcpu->mmu.page_fault(vcpu, gva, error_code);

}

static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)

{

        if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))

                __kvm_mmu_free_some_pages(vcpu);

}

static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)

{

        if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))

                return 0;