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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.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__ */
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