include/xen/interface/event_channel.h

Source file repositories/reference/linux-study-clean/include/xen/interface/event_channel.h

File Facts

System
Linux kernel
Corpus path
include/xen/interface/event_channel.h
Extension
.h
Size
7653 bytes
Lines
280
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct evtchn_alloc_unbound {
	/* IN parameters */
	domid_t dom, remote_dom;
	/* OUT parameters */
	evtchn_port_t port;
};

/*
 * EVTCHNOP_bind_interdomain: Construct an interdomain event channel between
 * the calling domain and <remote_dom>. <remote_dom,remote_port> must identify
 * a port that is unbound and marked as accepting bindings from the calling
 * domain. A fresh port is allocated in the calling domain and returned as
 * <local_port>.
 * NOTES:
 *  2. <remote_dom> may be DOMID_SELF, allowing loopback connections.
 */
#define EVTCHNOP_bind_interdomain 0
struct evtchn_bind_interdomain {
	/* IN parameters. */
	domid_t remote_dom;
	evtchn_port_t remote_port;
	/* OUT parameters. */
	evtchn_port_t local_port;
};

/*
 * EVTCHNOP_bind_virq: Bind a local event channel to VIRQ <irq> on specified
 * vcpu.
 * NOTES:
 *  1. A virtual IRQ may be bound to at most one event channel per vcpu.
 *  2. The allocated event channel is bound to the specified vcpu. The binding
 *     may not be changed.
 */
#define EVTCHNOP_bind_virq	  1
struct evtchn_bind_virq {
	/* IN parameters. */
	uint32_t virq;
	uint32_t vcpu;
	/* OUT parameters. */
	evtchn_port_t port;
};

/*
 * EVTCHNOP_bind_pirq: Bind a local event channel to PIRQ <irq>.
 * NOTES:
 *  1. A physical IRQ may be bound to at most one event channel per domain.
 *  2. Only a sufficiently-privileged domain may bind to a physical IRQ.
 */
#define EVTCHNOP_bind_pirq	  2
struct evtchn_bind_pirq {
	/* IN parameters. */
	uint32_t pirq;
#define BIND_PIRQ__WILL_SHARE 1
	uint32_t flags; /* BIND_PIRQ__* */
	/* OUT parameters. */
	evtchn_port_t port;
};

/*
 * EVTCHNOP_bind_ipi: Bind a local event channel to receive events.
 * NOTES:
 *  1. The allocated event channel is bound to the specified vcpu. The binding
 *     may not be changed.
 */
#define EVTCHNOP_bind_ipi	  7
struct evtchn_bind_ipi {
	uint32_t vcpu;
	/* OUT parameters. */
	evtchn_port_t port;
};

/*
 * EVTCHNOP_close: Close a local event channel <port>. If the channel is
 * interdomain then the remote end is placed in the unbound state
 * (EVTCHNSTAT_unbound), awaiting a new connection.
 */
#define EVTCHNOP_close		  3
struct evtchn_close {
	/* IN parameters. */
	evtchn_port_t port;
};

/*
 * EVTCHNOP_send: Send an event to the remote end of the channel whose local
 * endpoint is <port>.
 */
#define EVTCHNOP_send		  4
struct evtchn_send {
	/* IN parameters. */
	evtchn_port_t port;

Annotation

Implementation Notes