sched.h

xen虚拟机源代码安装包

#ifndef __SCHED_H__
#define __SCHED_H__

#include <xen/config.h>
#include <xen/types.h>
#include <xen/spinlock.h>
#include <xen/smp.h>
#include <xen/shared.h>
#include <public/xen.h>
#include <public/domctl.h>
#include <public/vcpu.h>
#include <public/xsm/acm.h>
#include <xen/time.h>
#include <xen/timer.h>
#include <xen/grant_table.h>
#include <xen/rangeset.h>
#include <asm/domain.h>
#include <xen/xenoprof.h>
#include <xen/rcupdate.h>
#include <xen/irq.h>

#ifdef CONFIG_COMPAT
#include <compat/vcpu.h>
DEFINE_XEN_GUEST_HANDLE(vcpu_runstate_info_compat_t);
#endif

/* A global pointer to the initial domain (DOM0). */
extern struct domain *dom0;

#ifndef CONFIG_COMPAT
#define MAX_EVTCHNS(d)     NR_EVENT_CHANNELS
#else
#define MAX_EVTCHNS(d)     (!IS_COMPAT(d) ? \
                            NR_EVENT_CHANNELS : \
                            sizeof(unsigned int) * sizeof(unsigned int) * 64)
#endif
#define EVTCHNS_PER_BUCKET 128
#define NR_EVTCHN_BUCKETS  (NR_EVENT_CHANNELS / EVTCHNS_PER_BUCKET)

struct evtchn
{
#define ECS_FREE         0 /* Channel is available for use.                  */
#define ECS_RESERVED     1 /* Channel is reserved.                           */
#define ECS_UNBOUND      2 /* Channel is waiting to bind to a remote domain. */
#define ECS_INTERDOMAIN  3 /* Channel is bound to another domain.            */
#define ECS_PIRQ         4 /* Channel is bound to a physical IRQ line.       */
#define ECS_VIRQ         5 /* Channel is bound to a virtual IRQ line.        */
#define ECS_IPI          6 /* Channel is bound to a virtual IPI line.        */
    u8  state;             /* ECS_* */
    u8  consumer_is_xen;   /* Consumed by Xen or by guest? */
    u16 notify_vcpu_id;    /* VCPU for local delivery notification */
    union {
        struct {
            domid_t remote_domid;
        } unbound;     /* state == ECS_UNBOUND */
        struct {
            u16            remote_port;
            struct domain *remote_dom;
        } interdomain; /* state == ECS_INTERDOMAIN */
        u16 pirq;      /* state == ECS_PIRQ */
        u16 virq;      /* state == ECS_VIRQ */
    } u;
#ifdef FLASK_ENABLE
    void *ssid;
#endif
};

int  evtchn_init(struct domain *d);
void evtchn_destroy(struct domain *d);

struct vcpu 
{
    int              vcpu_id;

    int              processor;

    vcpu_info_t     *vcpu_info;

    struct domain   *domain;

    struct vcpu     *next_in_list;

    uint64_t         periodic_period;
    uint64_t         periodic_last_event;
    struct timer     periodic_timer;
    struct timer     singleshot_timer;

    struct timer     poll_timer;    /* timeout for SCHEDOP_poll */

    void            *sched_priv;    /* scheduler-specific data */

    struct vcpu_runstate_info runstate;
#ifndef CONFIG_COMPAT
# define runstate_guest(v) ((v)->runstate_guest)
    XEN_GUEST_HANDLE(vcpu_runstate_info_t) runstate_guest; /* guest address */
#else
# define runstate_guest(v) ((v)->runstate_guest.native)
    union {
        XEN_GUEST_HANDLE(vcpu_runstate_info_t) native;
        XEN_GUEST_HANDLE(vcpu_runstate_info_compat_t) compat;
    } runstate_guest; /* guest address */
#endif

    /* Has the FPU been initialised? */
    bool_t           fpu_initialised;
    /* Has the FPU been used since it was last saved? */
    bool_t           fpu_dirtied;
    /* Is this VCPU polling any event channels (SCHEDOP_poll)? */
    bool_t           is_polling;
    /* Initialization completed for this VCPU? */
    bool_t           is_initialised;
    /* Currently running on a CPU? */
    bool_t           is_running;
    /* MCE callback pending for this VCPU? */
    bool_t           mce_pending;
    /* NMI callback pending for this VCPU? */
    bool_t           nmi_pending;

    /* Higher priorized traps may interrupt lower priorized traps,
     * lower priorized traps wait until higher priorized traps finished.
     * Note: This concept is known as "system priority level" (spl)
     * in the UNIX world. */
    uint16_t         old_trap_priority;
    uint16_t         trap_priority;
#define VCPU_TRAP_NONE    0
#define VCPU_TRAP_NMI     1
#define VCPU_TRAP_MCE     2

    /* Require shutdown to be deferred for some asynchronous operation? */
    bool_t           defer_shutdown;
    /* VCPU is paused following shutdown request (d->is_shutting_down)? */
    bool_t           paused_for_shutdown;
    /* VCPU affinity is temporarily locked from controller changes? */
    bool_t           affinity_locked;

    unsigned long    pause_flags;
    atomic_t         pause_count;

    /* IRQ-safe virq_lock protects against delivering VIRQ to stale evtchn. */
    u16              virq_to_evtchn[NR_VIRQS];
    spinlock_t       virq_lock;

    /* Bitmask of CPUs on which this VCPU may run. */
    cpumask_t        cpu_affinity;
    /* Used to change affinity temporarily. */
    cpumask_t        cpu_affinity_tmp;

    /* Bitmask of CPUs which are holding onto this VCPU's state. */
    cpumask_t        vcpu_dirty_cpumask;

    struct arch_vcpu arch;
};

/* Per-domain lock can be recursively acquired in fault handlers. */
#define domain_lock(d) spin_lock_recursive(&(d)->domain_lock)
#define domain_unlock(d) spin_unlock_recursive(&(d)->domain_lock)
#define domain_is_locked(d) spin_is_locked(&(d)->domain_lock)

struct domain
{
    domid_t          domain_id;

    shared_info_t   *shared_info;     /* shared data area */

    spinlock_t       domain_lock;

    spinlock_t       page_alloc_lock; /* protects all the following fields  */
    struct list_head page_list;       /* linked list, of size tot_pages     */
    struct list_head xenpage_list;    /* linked list, of size xenheap_pages */
    unsigned int     tot_pages;       /* number of pages currently possesed */
    unsigned int     max_pages;       /* maximum value for tot_pages        */
    unsigned int     xenheap_pages;   /* # pages allocated from Xen heap    */

    /* Scheduling. */
    void            *sched_priv;    /* scheduler-specific data */

    struct domain   *next_in_list;
    struct domain   *next_in_hashbucket;

    struct list_head rangesets;
    spinlock_t       rangesets_lock;

    /* Event channel information. */
    struct evtchn   *evtchn[NR_EVTCHN_BUCKETS];
    spinlock_t       evtchn_lock;

    struct grant_table *grant_table;

    /*
     * Interrupt to event-channel mappings. Updates should be protected by the 
     * domain's event-channel spinlock. Read accesses can also synchronise on 
     * the lock, but races don't usually matter.
     */
    u16              pirq_to_evtchn[NR_IRQS];
    DECLARE_BITMAP(pirq_mask, NR_IRQS);

    /* I/O capabilities (access to IRQs and memory-mapped I/O). */
    struct rangeset *iomem_caps;
    struct rangeset *irq_caps;

    /* Is this an HVM guest? */
    bool_t           is_hvm;
    /* Does this guest need iommu mappings? */
    bool_t           need_iommu;
    /* Is this guest fully privileged (aka dom0)? */
    bool_t           is_privileged;
    /* Which guest this guest has privileges on */
    struct domain   *target;
    /* Is this guest being debugged by dom0? */
    bool_t           debugger_attached;
    /* Are any VCPUs polling event channels (SCHEDOP_poll)? */
    bool_t           is_polling;
    /* Is this guest dying (i.e., a zombie)? */
    enum { DOMDYING_alive, DOMDYING_dying, DOMDYING_dead } is_dying;
    /* Domain is paused by controller software? */
    bool_t           is_paused_by_controller;
    /* Domain's VCPUs are pinned 1:1 to physical CPUs? */
    bool_t           is_pinned;

    /* Guest has shut down (inc. reason code)? */
    spinlock_t       shutdown_lock;
    bool_t           is_shutting_down; /* in process of shutting down? */
    bool_t           is_shut_down;     /* fully shut down? */
    int              shutdown_code;

    /* If this is not 0, send suspend notification here instead of
     * raising DOM_EXC */
    int              suspend_evtchn;

    atomic_t         pause_count;

    unsigned long    vm_assist;

    atomic_t         refcnt;

    struct vcpu *vcpu[MAX_VIRT_CPUS];

    /* Bitmask of CPUs which are holding onto this domain's state. */
    cpumask_t        domain_dirty_cpumask;

    struct arch_domain arch;

    void *ssid; /* sHype security subject identifier */

    /* Control-plane tools handle for this domain. */
    xen_domain_handle_t handle;

    /* OProfile support. */
    struct xenoprof *xenoprof;
    int32_t time_offset_seconds;

    struct rcu_head rcu;

    /*
     * Hypercall deadlock avoidance lock. Used if a hypercall might
     * cause a deadlock. Acquirers don't spin waiting; they preempt.
     */
    spinlock_t hypercall_deadlock_mutex;

    /* VRAM dirty support. */
    struct sh_dirty_vram *dirty_vram;
};

struct domain_setup_info
{
    /* Initialised by caller. */
    unsigned long image_addr;
    unsigned long image_len;
    /* Initialised by loader: Public. */
    unsigned long v_start;
    unsigned long v_end;
    unsigned long v_kernstart;
    unsigned long v_kernend;
    unsigned long v_kernentry;
#define PAEKERN_no           0
#define PAEKERN_yes          1
#define PAEKERN_extended_cr3 2
#define PAEKERN_bimodal      3
    unsigned int  pae_kernel;