ia64/xen-unstable

view xen/include/public/hvm/save.h @ 16171:e7d7a4adf357

[IA64] vti domain save/restore: implement hvm_save/load. work in progress.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Alex Williamson <alex.williamson@hp.com>
date Sun Oct 21 14:39:07 2007 -0600 (2007-10-21)
parents a87d94be1172
children da9bd2e81288
line source
1 /*
2 * hvm/save.h
3 *
4 * Structure definitions for HVM state that is held by Xen and must
5 * be saved along with the domain's memory and device-model state.
6 *
7 * Copyright (c) 2007 XenSource Ltd.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to
11 * deal in the Software without restriction, including without limitation the
12 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
13 * sell copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25 * DEALINGS IN THE SOFTWARE.
26 */
28 #ifndef __XEN_PUBLIC_HVM_SAVE_H__
29 #define __XEN_PUBLIC_HVM_SAVE_H__
31 /*
32 * Structures in this header *must* have the same layout in 32bit
33 * and 64bit environments: this means that all fields must be explicitly
34 * sized types and aligned to their sizes, and the structs must be
35 * a multiple of eight bytes long.
36 *
37 * Only the state necessary for saving and restoring (i.e. fields
38 * that are analogous to actual hardware state) should go in this file.
39 * Internal mechanisms should be kept in Xen-private headers.
40 */
42 /*
43 * Each entry is preceded by a descriptor giving its type and length
44 */
45 struct hvm_save_descriptor {
46 uint16_t typecode; /* Used to demux the various types below */
47 uint16_t instance; /* Further demux within a type */
48 uint32_t length; /* In bytes, *not* including this descriptor */
49 };
52 /*
53 * Each entry has a datatype associated with it: for example, the CPU state
54 * is saved as a HVM_SAVE_TYPE(CPU), which has HVM_SAVE_LENGTH(CPU),
55 * and is identified by a descriptor with typecode HVM_SAVE_CODE(CPU).
56 * DECLARE_HVM_SAVE_TYPE binds these things together with some type-system
57 * ugliness.
58 */
60 #define DECLARE_HVM_SAVE_TYPE(_x, _code, _type) \
61 struct __HVM_SAVE_TYPE_##_x { _type t; char c[_code]; }
63 #define HVM_SAVE_TYPE(_x) typeof (((struct __HVM_SAVE_TYPE_##_x *)(0))->t)
64 #define HVM_SAVE_LENGTH(_x) (sizeof (HVM_SAVE_TYPE(_x)))
65 #define HVM_SAVE_CODE(_x) (sizeof (((struct __HVM_SAVE_TYPE_##_x *)(0))->c))
68 /*
69 * The series of save records is teminated by a zero-type, zero-length
70 * descriptor.
71 */
73 struct hvm_save_end {};
74 DECLARE_HVM_SAVE_TYPE(END, 0, struct hvm_save_end);
76 #if defined(__i386__) || defined(__x86_64__)
77 #include "../arch-x86/hvm/save.h"
78 #elif defined(__ia64__)
79 #include "../arch-ia64/hvm/save.h"
80 #else
81 #error "unsupported architecture"
82 #endif
84 #endif /* __XEN_PUBLIC_HVM_SAVE_H__ */