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