1 /******************************************************************************
4 * Definitions used for the Xen ELF notes.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
24 * Copyright (c) 2006, Ian Campbell, XenSource Ltd.
27 #ifndef __XEN_PUBLIC_ELFNOTE_H__
28 #define __XEN_PUBLIC_ELFNOTE_H__
31 * The notes should live in a SHT_NOTE segment and have "Xen" in the
34 * Numeric types are either 4 or 8 bytes depending on the content of
37 * LEGACY indicated the fields in the legacy __xen_guest string which
38 * this a note type replaces.
40 * String values (for non-legacy) are NULL terminated ASCII, also known
45 * NAME=VALUE pair (string).
47 #define XEN_ELFNOTE_INFO 0
50 * The virtual address of the entry point (numeric).
54 #define XEN_ELFNOTE_ENTRY 1
56 /* The virtual address of the hypercall transfer page (numeric).
58 * LEGACY: HYPERCALL_PAGE. (n.b. legacy value is a physical page
59 * number not a virtual address)
61 #define XEN_ELFNOTE_HYPERCALL_PAGE 2
63 /* The virtual address where the kernel image should be mapped (numeric).
69 #define XEN_ELFNOTE_VIRT_BASE 3
72 * The offset of the ELF paddr field from the acutal required
73 * pseudo-physical address (numeric).
75 * This is used to maintain backwards compatibility with older kernels
76 * which wrote __PAGE_OFFSET into that field. This field defaults to 0
79 * LEGACY: ELF_PADDR_OFFSET. (n.b. legacy default is VIRT_BASE)
81 #define XEN_ELFNOTE_PADDR_OFFSET 4
84 * The version of Xen that we work with (string).
88 #define XEN_ELFNOTE_XEN_VERSION 5
91 * The name of the guest operating system (string).
95 #define XEN_ELFNOTE_GUEST_OS 6
98 * The version of the guest operating system (string).
102 #define XEN_ELFNOTE_GUEST_VERSION 7
105 * The loader type (string).
109 #define XEN_ELFNOTE_LOADER 8
112 * The kernel supports PAE (x86/32 only, string = "yes" or "no").
114 * LEGACY: PAE (n.b. The legacy interface included a provision to
115 * indicate 'extended-cr3' support allowing L3 page tables to be
116 * placed above 4G. It is assumed that any kernel new enough to use
117 * these ELF notes will include this and therefore "yes" here is
118 * equivalent to "yes[entended-cr3]" in the __xen_guest interface.
120 #define XEN_ELFNOTE_PAE_MODE 9
123 * The features supported/required by this kernel (string).
125 * The string must consist of a list of feature names (as given in
126 * features.h, without the "XENFEAT_" prefix) separated by '|'
127 * characters. If a feature is required for the kernel to function
128 * then the feature name must be preceded by a '!' character.
132 #define XEN_ELFNOTE_FEATURES 10
135 * The kernel requires the symbol table to be loaded (string = "yes" or "no")
136 * LEGACY: BSD_SYMTAB (n.b. The legacy treated the presence or absence
137 * of this string as a boolean flag rather than requiring "yes" or
140 #define XEN_ELFNOTE_BSD_SYMTAB 11
143 * The lowest address the hypervisor hole can begin at (numeric).
145 * This must not be set higher than HYPERVISOR_VIRT_START. Its presence
146 * also indicates to the hypervisor that the kernel can deal with the
147 * hole starting at a higher address.
149 #define XEN_ELFNOTE_HV_START_LOW 12
152 * List of maddr_t-sized mask/value pairs describing how to recognize
153 * (non-present) L1 page table entries carrying valid MFNs (numeric).
155 #define XEN_ELFNOTE_L1_MFN_VALID 13
158 * Whether or not the guest supports cooperative suspend cancellation.
159 * This is a numeric value.
163 #define XEN_ELFNOTE_SUSPEND_CANCEL 14
166 * The (non-default) location the initial phys-to-machine map should be
167 * placed at by the hypervisor (Dom0) or the tools (DomU).
168 * The kernel must be prepared for this mapping to be established using
169 * large pages, despite such otherwise not being available to guests.
170 * The kernel must also be able to handle the page table pages used for
171 * this mapping not being accessible through the initial mapping.
172 * (Only x86-64 supports this at present.)
174 #define XEN_ELFNOTE_INIT_P2M 15
177 * Whether or not the guest can deal with being passed an initrd not
178 * mapped through its initial page tables.
180 #define XEN_ELFNOTE_MOD_START_PFN 16
183 * The features supported by this kernel (numeric).
185 * Other than XEN_ELFNOTE_FEATURES on pre-4.2 Xen, this note allows a
186 * kernel to specify support for features that older hypervisors don't
187 * know about. The set of features 4.2 and newer hypervisors will
188 * consider supported by the kernel is the combination of the sets
189 * specified through this and the string note.
193 #define XEN_ELFNOTE_SUPPORTED_FEATURES 17
196 * The number of the highest elfnote defined.
198 #define XEN_ELFNOTE_MAX XEN_ELFNOTE_SUPPORTED_FEATURES
200 #endif /* __XEN_PUBLIC_ELFNOTE_H__ */
208 * indent-tabs-mode: nil