FM / interface

/usr/src/linux-headers-5.15.0-190/include/xen/interface/

/usr/src/linux-headers-5.15.0-190/include/xen/interface

Name	Size	Mode	Actions
hvm/	-	0755	rm
io/	-	0755	rm
callback.h	3542	0644	edit dl rm
elfnote.h	6424	0644	edit dl rm
event_channel.h	7657	0644	edit dl rm
features.h	3403	0644	edit dl rm
grant_table.h	20944	0644	edit dl rm
memory.h	10927	0644	edit dl rm
nmi.h	1546	0644	edit dl rm
physdev.h	8433	0644	edit dl rm
platform.h	16512	0644	edit dl rm
sched.h	6727	0644	edit dl rm
vcpu.h	8672	0644	edit dl rm
version.h	2098	0644	edit dl rm
xen-mca.h	11167	0644	edit dl rm
xen.h	31692	0644	edit dl rm
xenpmu.h	2532	0644	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-190/include/xen/interface/event_channel.h (7657B)

/* SPDX-License-Identifier: GPL-2.0 */
/******************************************************************************
 * event_channel.h
 *
 * Event channels between domains.
 *
 * Copyright (c) 2003-2004, K A Fraser.
 */

#ifndef __XEN_PUBLIC_EVENT_CHANNEL_H__
#define __XEN_PUBLIC_EVENT_CHANNEL_H__

#include <xen/interface/xen.h>

typedef uint32_t evtchn_port_t;
DEFINE_GUEST_HANDLE(evtchn_port_t);

/*
 * EVTCHNOP_alloc_unbound: Allocate a port in domain <dom> and mark as
 * accepting interdomain bindings from domain <remote_dom>. A fresh port
 * is allocated in <dom> and returned as <port>.
 * NOTES:
 *  1. If the caller is unprivileged then <dom> must be DOMID_SELF.
 *  2. <rdom> may be DOMID_SELF, allowing loopback connections.
 */
#define EVTCHNOP_alloc_unbound	  6
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;
};

/*
 * EVTCHNOP_status: Get the current status of the communication channel which
 * has an endpoint at <dom, port>.
 * NOTES:
 *  1. <dom> may be specified as DOMID_SELF.
 *  2. Only a sufficiently-privileged domain may obtain the status of an event
 *     channel for which <dom> is not DOMID_SELF.
 */
#define EVTCHNOP_status		  5
struct evtchn_status {
	/* IN parameters */
	domid_t  dom;
	evtchn_port_t port;
	/* OUT parameters */
#define EVTCHNSTAT_closed	0  /* Channel is not in use.		     */
#define EVTCHNSTAT_unbound	1  /* Channel is waiting interdom connection.*/
#define EVTCHNSTAT_interdomain	2  /* Channel is connected to remote domain. */
#define EVTCHNSTAT_pirq		3  /* Channel is bound to a phys IRQ line.   */
#define EVTCHNSTAT_virq		4  /* Channel is bound to a virtual IRQ line */
#define EVTCHNSTAT_ipi		5  /* Channel is bound to a virtual IPI line */
	uint32_t status;
	uint32_t vcpu;		   /* VCPU to which this channel is bound.   */
	union {
		struct {
			domid_t dom;
		} unbound; /* EVTCHNSTAT_unbound */
		struct {
			domid_t dom;
			evtchn_port_t port;
		} interdomain; /* EVTCHNSTAT_interdomain */
		uint32_t pirq;	    /* EVTCHNSTAT_pirq	      */
		uint32_t virq;	    /* EVTCHNSTAT_virq	      */
	} u;
};

/*
 * EVTCHNOP_bind_vcpu: Specify which vcpu a channel should notify when an
 * event is pending.
 * NOTES:
 *  1. IPI- and VIRQ-bound channels always notify the vcpu that initialised
 *     the binding. This binding cannot be changed.
 *  2. All other channels notify vcpu0 by default. This default is set when
 *     the channel is allocated (a port that is freed and subsequently reused
 *     has its binding reset to vcpu0).
 */
#define EVTCHNOP_bind_vcpu	  8
struct evtchn_bind_vcpu {
	/* IN parameters. */
	evtchn_port_t port;
	uint32_t vcpu;
};

/*
 * EVTCHNOP_unmask: Unmask the specified local event-channel port and deliver
 * a notification to the appropriate VCPU if an event is pending.
 */
#define EVTCHNOP_unmask		  9
struct evtchn_unmask {
	/* IN parameters. */
	evtchn_port_t port;
};

/*
 * EVTCHNOP_reset: Close all event channels associated with specified domain.
 * NOTES:
 *  1. <dom> may be specified as DOMID_SELF.
 *  2. Only a sufficiently-privileged domain may specify other than DOMID_SELF.
 */
#define EVTCHNOP_reset		 10
struct evtchn_reset {
	/* IN parameters. */
	domid_t dom;
};
typedef struct evtchn_reset evtchn_reset_t;

/*
 * EVTCHNOP_init_control: initialize the control block for the FIFO ABI.
 */
#define EVTCHNOP_init_control    11
struct evtchn_init_control {
	/* IN parameters. */
	uint64_t control_gfn;
	uint32_t offset;
	uint32_t vcpu;
	/* OUT parameters. */
	uint8_t link_bits;
	uint8_t _pad[7];
};

/*
 * EVTCHNOP_expand_array: add an additional page to the event array.
 */
#define EVTCHNOP_expand_array    12
struct evtchn_expand_array {
	/* IN parameters. */
	uint64_t array_gfn;
};

/*
 * EVTCHNOP_set_priority: set the priority for an event channel.
 */
#define EVTCHNOP_set_priority    13
struct evtchn_set_priority {
	/* IN parameters. */
	evtchn_port_t port;
	uint32_t priority;
};

struct evtchn_op {
	uint32_t cmd; /* EVTCHNOP_* */
	union {
		struct evtchn_alloc_unbound    alloc_unbound;
		struct evtchn_bind_interdomain bind_interdomain;
		struct evtchn_bind_virq	       bind_virq;
		struct evtchn_bind_pirq	       bind_pirq;
		struct evtchn_bind_ipi	       bind_ipi;
		struct evtchn_close	       close;
		struct evtchn_send	       send;
		struct evtchn_status	       status;
		struct evtchn_bind_vcpu	       bind_vcpu;
		struct evtchn_unmask	       unmask;
	} u;
};
DEFINE_GUEST_HANDLE_STRUCT(evtchn_op);

/*
 * 2-level ABI
 */

#define EVTCHN_2L_NR_CHANNELS (sizeof(xen_ulong_t) * sizeof(xen_ulong_t) * 64)

/*
 * FIFO ABI
 */

/* Events may have priorities from 0 (highest) to 15 (lowest). */
#define EVTCHN_FIFO_PRIORITY_MAX     0
#define EVTCHN_FIFO_PRIORITY_DEFAULT 7
#define EVTCHN_FIFO_PRIORITY_MIN     15

#define EVTCHN_FIFO_MAX_QUEUES (EVTCHN_FIFO_PRIORITY_MIN + 1)

typedef uint32_t event_word_t;

#define EVTCHN_FIFO_PENDING 31
#define EVTCHN_FIFO_MASKED  30
#define EVTCHN_FIFO_LINKED  29
#define EVTCHN_FIFO_BUSY    28

#define EVTCHN_FIFO_LINK_BITS 17
#define EVTCHN_FIFO_LINK_MASK ((1 << EVTCHN_FIFO_LINK_BITS) - 1)

#define EVTCHN_FIFO_NR_CHANNELS (1 << EVTCHN_FIFO_LINK_BITS)

struct evtchn_fifo_control_block {
	uint32_t     ready;
	uint32_t     _rsvd;
	event_word_t head[EVTCHN_FIFO_MAX_QUEUES];
};

#endif /* __XEN_PUBLIC_EVENT_CHANNEL_H__ */

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