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The current path of the Xen headers at /sys/xen/interface/ is not correct, as those headers are imported verbatim from the Xen sources and shouldn't be modified, as any modifications would be lost when a new version is imported. Changes to the public headers must be first done in Xen upstream so that they can be backported and new imports will already carry them. Import Xen 4.16 headers in sys/contrib/xen/. It's unlikely that we will import different Xen code, so don't place them inside of any subdirectory. If in the future other pieces of Xen code need to be imported the headers will need to move into an include/ subdirectory. Note that this commit does not yet modify the include path to use the newly imported headers. Sponsored by: Citrix Systems R&D
114 lines
4.5 KiB
C
114 lines
4.5 KiB
C
/*
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* hvm/save.h
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*
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* Structure definitions for HVM state that is held by Xen and must
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* be saved along with the domain's memory and device-model state.
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*
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* Copyright (c) 2007 XenSource Ltd.
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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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#ifndef __XEN_PUBLIC_HVM_SAVE_H__
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#define __XEN_PUBLIC_HVM_SAVE_H__
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/*
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* Structures in this header *must* have the same layout in 32bit
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* and 64bit environments: this means that all fields must be explicitly
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* sized types and aligned to their sizes, and the structs must be
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* a multiple of eight bytes long.
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*
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* Only the state necessary for saving and restoring (i.e. fields
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* that are analogous to actual hardware state) should go in this file.
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* Internal mechanisms should be kept in Xen-private headers.
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*/
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#if !defined(__GNUC__) || defined(__STRICT_ANSI__)
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#error "Anonymous structs/unions are a GNU extension."
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#endif
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/*
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* Each entry is preceded by a descriptor giving its type and length
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*/
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struct hvm_save_descriptor {
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uint16_t typecode; /* Used to demux the various types below */
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uint16_t instance; /* Further demux within a type */
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uint32_t length; /* In bytes, *not* including this descriptor */
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};
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/*
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* Each entry has a datatype associated with it: for example, the CPU state
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* is saved as a HVM_SAVE_TYPE(CPU), which has HVM_SAVE_LENGTH(CPU),
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* and is identified by a descriptor with typecode HVM_SAVE_CODE(CPU).
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* DECLARE_HVM_SAVE_TYPE binds these things together with some type-system
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* ugliness.
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*/
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#ifdef __XEN__
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# define DECLARE_HVM_SAVE_TYPE_COMPAT(_x, _code, _type, _ctype, _fix) \
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static inline int __HVM_SAVE_FIX_COMPAT_##_x(void *h, uint32_t size) \
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{ return _fix(h, size); } \
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struct __HVM_SAVE_TYPE_##_x { _type t; char c[_code]; char cpt[2];}; \
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struct __HVM_SAVE_TYPE_COMPAT_##_x { _ctype t; }
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# include <xen/lib.h> /* BUG() */
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# define DECLARE_HVM_SAVE_TYPE(_x, _code, _type) \
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static inline int __HVM_SAVE_FIX_COMPAT_##_x(void *h, uint32_t size) \
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{ BUG(); return -1; } \
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struct __HVM_SAVE_TYPE_##_x { _type t; char c[_code]; char cpt[1];}; \
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struct __HVM_SAVE_TYPE_COMPAT_##_x { _type t; }
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#else
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# define DECLARE_HVM_SAVE_TYPE_COMPAT(_x, _code, _type, _ctype, _fix) \
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struct __HVM_SAVE_TYPE_##_x { _type t; char c[_code]; char cpt[2];}
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# define DECLARE_HVM_SAVE_TYPE(_x, _code, _type) \
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struct __HVM_SAVE_TYPE_##_x { _type t; char c[_code]; char cpt[1];}
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#endif
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#define HVM_SAVE_TYPE(_x) __typeof__ (((struct __HVM_SAVE_TYPE_##_x *)(0))->t)
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#define HVM_SAVE_LENGTH(_x) (sizeof (HVM_SAVE_TYPE(_x)))
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#define HVM_SAVE_CODE(_x) (sizeof (((struct __HVM_SAVE_TYPE_##_x *)(0))->c))
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#ifdef __XEN__
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# define HVM_SAVE_TYPE_COMPAT(_x) __typeof__ (((struct __HVM_SAVE_TYPE_COMPAT_##_x *)(0))->t)
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# define HVM_SAVE_LENGTH_COMPAT(_x) (sizeof (HVM_SAVE_TYPE_COMPAT(_x)))
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# define HVM_SAVE_HAS_COMPAT(_x) (sizeof (((struct __HVM_SAVE_TYPE_##_x *)(0))->cpt)-1)
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# define HVM_SAVE_FIX_COMPAT(_x, _dst, _size) __HVM_SAVE_FIX_COMPAT_##_x(_dst, _size)
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#endif
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/*
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* The series of save records is teminated by a zero-type, zero-length
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* descriptor.
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*/
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struct hvm_save_end {};
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DECLARE_HVM_SAVE_TYPE(END, 0, struct hvm_save_end);
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#if defined(__i386__) || defined(__x86_64__)
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#include "../arch-x86/hvm/save.h"
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#elif defined(__arm__) || defined(__aarch64__)
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#include "../arch-arm/hvm/save.h"
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#else
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#error "unsupported architecture"
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#endif
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#endif /* __XEN_PUBLIC_HVM_SAVE_H__ */
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