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/******************************************************************************
* callback.h
*
* Register guest OS callbacks with Xen.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Copyright (c) 2006, Ian Campbell
*/
#ifndef __XEN_PUBLIC_CALLBACK_H__
#define __XEN_PUBLIC_CALLBACK_H__
#include <xen/interface/xen.h>
/*
* Prototype for this hypercall is:
* long callback_op(int cmd, void *extra_args)
* @cmd == CALLBACKOP_??? (callback operation).
* @extra_args == Operation-specific extra arguments (NULL if none).
*/
/* ia64, x86: Callback for event delivery. */
#define CALLBACKTYPE_event 0
/* x86: Failsafe callback when guest state cannot be restored by Xen. */
#define CALLBACKTYPE_failsafe 1
/* x86/64 hypervisor: Syscall by 64-bit guest app ('64-on-64-on-64'). */
#define CALLBACKTYPE_syscall 2
/*
* x86/32 hypervisor: Only available on x86/32 when supervisor_mode_kernel
* feature is enabled. Do not use this callback type in new code.
*/
#define CALLBACKTYPE_sysenter_deprecated 3
/* x86: Callback for NMI delivery. */
#define CALLBACKTYPE_nmi 4
/*
* x86: sysenter is only available as follows:
* - 32-bit hypervisor: with the supervisor_mode_kernel feature enabled
* - 64-bit hypervisor: 32-bit guest applications on Intel CPUs
* ('32-on-32-on-64', '32-on-64-on-64')
* [nb. also 64-bit guest applications on Intel CPUs
* ('64-on-64-on-64'), but syscall is preferred]
*/
#define CALLBACKTYPE_sysenter 5
/*
* x86/64 hypervisor: Syscall by 32-bit guest app on AMD CPUs
* ('32-on-32-on-64', '32-on-64-on-64')
*/
#define CALLBACKTYPE_syscall32 7
/*
* Disable event deliver during callback? This flag is ignored for event and
* NMI callbacks: event delivery is unconditionally disabled.
*/
#define _CALLBACKF_mask_events 0
#define CALLBACKF_mask_events (1U << _CALLBACKF_mask_events)
/*
* Register a callback.
*/
#define CALLBACKOP_register 0
struct callback_register {
uint16_t type;
uint16_t flags;
xen_callback_t address;
};
/*
* Unregister a callback.
*
* Not all callbacks can be unregistered. -EINVAL will be returned if
* you attempt to unregister such a callback.
*/
#define CALLBACKOP_unregister 1
struct callback_unregister {
uint16_t type;
uint16_t _unused;
};
#endif /* __XEN_PUBLIC_CALLBACK_H__ */