FreeBSD/Linux Kernel Cross Reference
sys/xen/interface/elfnote.h

     /******************************************************************************
      * elfnote.h
      *
      * Definitions used for the Xen ELF notes.
      *
      * 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, XenSource Ltd.
     */
    
    #ifndef __XEN_PUBLIC_ELFNOTE_H__
    #define __XEN_PUBLIC_ELFNOTE_H__
    
    /*
     * `incontents 200 elfnotes ELF notes
     *
     * The notes should live in a PT_NOTE segment and have "Xen" in the
     * name field.
     *
     * Numeric types are either 4 or 8 bytes depending on the content of
     * the desc field.
     *
     * LEGACY indicated the fields in the legacy __xen_guest string which
     * this a note type replaces.
     *
     * String values (for non-legacy) are NULL terminated ASCII, also known
     * as ASCIZ type.
     */
    
    /*
     * NAME=VALUE pair (string).
     */
    #define XEN_ELFNOTE_INFO           0
    
    /*
     * The virtual address of the entry point (numeric).
     *
     * LEGACY: VIRT_ENTRY
     */
    #define XEN_ELFNOTE_ENTRY          1
    
    /* The virtual address of the hypercall transfer page (numeric).
     *
     * LEGACY: HYPERCALL_PAGE. (n.b. legacy value is a physical page
     * number not a virtual address)
     */
    #define XEN_ELFNOTE_HYPERCALL_PAGE 2
    
    /* The virtual address where the kernel image should be mapped (numeric).
     *
     * Defaults to 0.
     *
     * LEGACY: VIRT_BASE
     */
    #define XEN_ELFNOTE_VIRT_BASE      3
    
    /*
     * The offset of the ELF paddr field from the actual required
     * pseudo-physical address (numeric).
     *
     * This is used to maintain backwards compatibility with older kernels
     * which wrote __PAGE_OFFSET into that field. This field defaults to 0
     * if not present.
     *
     * LEGACY: ELF_PADDR_OFFSET. (n.b. legacy default is VIRT_BASE)
     */
    #define XEN_ELFNOTE_PADDR_OFFSET   4
    
    /*
     * The version of Xen that we work with (string).
     *
     * LEGACY: XEN_VER
     */
    #define XEN_ELFNOTE_XEN_VERSION    5
    
    /*
     * The name of the guest operating system (string).
     *
     * LEGACY: GUEST_OS
     */
    #define XEN_ELFNOTE_GUEST_OS       6
    
    /*
    * The version of the guest operating system (string).
    *
    * LEGACY: GUEST_VER
    */
   #define XEN_ELFNOTE_GUEST_VERSION  7
   
   /*
    * The loader type (string).
    *
    * LEGACY: LOADER
    */
   #define XEN_ELFNOTE_LOADER         8
   
   /*
    * The kernel supports PAE (x86/32 only, string = "yes", "no" or
    * "bimodal").
    *
    * For compatibility with Xen 3.0.3 and earlier the "bimodal" setting
    * may be given as "yes,bimodal" which will cause older Xen to treat
    * this kernel as PAE.
    *
    * LEGACY: PAE (n.b. The legacy interface included a provision to
    * indicate 'extended-cr3' support allowing L3 page tables to be
    * placed above 4G. It is assumed that any kernel new enough to use
    * these ELF notes will include this and therefore "yes" here is
    * equivalent to "yes[entended-cr3]" in the __xen_guest interface.
    */
   #define XEN_ELFNOTE_PAE_MODE       9
   
   /*
    * The features supported/required by this kernel (string).
    *
    * The string must consist of a list of feature names (as given in
    * features.h, without the "XENFEAT_" prefix) separated by '|'
    * characters. If a feature is required for the kernel to function
    * then the feature name must be preceded by a '!' character.
    *
    * LEGACY: FEATURES
    */
   #define XEN_ELFNOTE_FEATURES      10
   
   /*
    * The kernel requires the symbol table to be loaded (string = "yes" or "no")
    * LEGACY: BSD_SYMTAB (n.b. The legacy treated the presence or absence
    * of this string as a boolean flag rather than requiring "yes" or
    * "no".
    */
   #define XEN_ELFNOTE_BSD_SYMTAB    11
   
   /*
    * The lowest address the hypervisor hole can begin at (numeric).
    *
    * This must not be set higher than HYPERVISOR_VIRT_START. Its presence
    * also indicates to the hypervisor that the kernel can deal with the
    * hole starting at a higher address.
    */
   #define XEN_ELFNOTE_HV_START_LOW  12
   
   /*
    * List of maddr_t-sized mask/value pairs describing how to recognize
    * (non-present) L1 page table entries carrying valid MFNs (numeric).
    */
   #define XEN_ELFNOTE_L1_MFN_VALID  13
   
   /*
    * Whether or not the guest supports cooperative suspend cancellation.
    * This is a numeric value.
    *
    * Default is 0
    */
   #define XEN_ELFNOTE_SUSPEND_CANCEL 14
   
   /*
    * The (non-default) location the initial phys-to-machine map should be
    * placed at by the hypervisor (Dom0) or the tools (DomU).
    * The kernel must be prepared for this mapping to be established using
    * large pages, despite such otherwise not being available to guests.
    * The kernel must also be able to handle the page table pages used for
    * this mapping not being accessible through the initial mapping.
    * (Only x86-64 supports this at present.)
    */
   #define XEN_ELFNOTE_INIT_P2M      15
   
   /*
    * Whether or not the guest can deal with being passed an initrd not
    * mapped through its initial page tables.
    */
   #define XEN_ELFNOTE_MOD_START_PFN 16
   
   /*
    * The features supported by this kernel (numeric).
    *
    * Other than XEN_ELFNOTE_FEATURES on pre-4.2 Xen, this note allows a
    * kernel to specify support for features that older hypervisors don't
    * know about. The set of features 4.2 and newer hypervisors will
    * consider supported by the kernel is the combination of the sets
    * specified through this and the string note.
    *
    * LEGACY: FEATURES
    */
   #define XEN_ELFNOTE_SUPPORTED_FEATURES 17
   
   /*
    * The number of the highest elfnote defined.
    */
   #define XEN_ELFNOTE_MAX XEN_ELFNOTE_SUPPORTED_FEATURES
   
   /*
    * System information exported through crash notes.
    *
    * The kexec / kdump code will create one XEN_ELFNOTE_CRASH_INFO 
    * note in case of a system crash. This note will contain various
    * information about the system, see xen/include/xen/elfcore.h.
    */
   #define XEN_ELFNOTE_CRASH_INFO 0x1000001
   
   /*
    * System registers exported through crash notes.
    *
    * The kexec / kdump code will create one XEN_ELFNOTE_CRASH_REGS 
    * note per cpu in case of a system crash. This note is architecture
    * specific and will contain registers not saved in the "CORE" note.
    * See xen/include/xen/elfcore.h for more information.
    */
   #define XEN_ELFNOTE_CRASH_REGS 0x1000002
   
   
   /*
    * xen dump-core none note.
    * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_NONE
    * in its dump file to indicate that the file is xen dump-core
    * file. This note doesn't have any other information.
    * See tools/libxc/xc_core.h for more information.
    */
   #define XEN_ELFNOTE_DUMPCORE_NONE               0x2000000
   
   /*
    * xen dump-core header note.
    * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_HEADER
    * in its dump file.
    * See tools/libxc/xc_core.h for more information.
    */
   #define XEN_ELFNOTE_DUMPCORE_HEADER             0x2000001
   
   /*
    * xen dump-core xen version note.
    * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_XEN_VERSION
    * in its dump file. It contains the xen version obtained via the
    * XENVER hypercall.
    * See tools/libxc/xc_core.h for more information.
    */
   #define XEN_ELFNOTE_DUMPCORE_XEN_VERSION        0x2000002
   
   /*
    * xen dump-core format version note.
    * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_FORMAT_VERSION
    * in its dump file. It contains a format version identifier.
    * See tools/libxc/xc_core.h for more information.
    */
   #define XEN_ELFNOTE_DUMPCORE_FORMAT_VERSION     0x2000003
   
   #endif /* __XEN_PUBLIC_ELFNOTE_H__ */
   
   /*
    * Local variables:
    * mode: C
    * c-file-style: "BSD"
    * c-basic-offset: 4
    * tab-width: 4
    * indent-tabs-mode: nil
    * End:
    */

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