/* SPDX-License-Identifier: MIT */ /****************************************************************************** * elfnote.h * * Definitions used for the Xen ELF notes. * * Copyright (c) 2006, Ian Campbell, XenSource Ltd. */ #ifndef __XEN_PUBLIC_ELFNOTE_H__ #define __XEN_PUBLIC_ELFNOTE_H__ /* * The notes should live in a SHT_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 … /* * The virtual address of the entry point (numeric). * * LEGACY: VIRT_ENTRY */ #define XEN_ELFNOTE_ENTRY … /* 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 … /* The virtual address where the kernel image should be mapped (numeric). * * Defaults to 0. * * LEGACY: VIRT_BASE */ #define XEN_ELFNOTE_VIRT_BASE … /* * The offset of the ELF paddr field from the acutal 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 … /* * The version of Xen that we work with (string). * * LEGACY: XEN_VER */ #define XEN_ELFNOTE_XEN_VERSION … /* * The name of the guest operating system (string). * * LEGACY: GUEST_OS */ #define XEN_ELFNOTE_GUEST_OS … /* * The version of the guest operating system (string). * * LEGACY: GUEST_VER */ #define XEN_ELFNOTE_GUEST_VERSION … /* * The loader type (string). * * LEGACY: LOADER */ #define XEN_ELFNOTE_LOADER … /* * The kernel supports PAE (x86/32 only, string = "yes" or "no"). * * 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 … /* * 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 … /* * 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 … /* * 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 … /* * 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 … /* * Whether or not the guest supports cooperative suspend cancellation. * This is a numeric value. * * Default is 0 */ #define XEN_ELFNOTE_SUSPEND_CANCEL … /* * 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 … /* * 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 … /* * 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 … /* * Physical entry point into the kernel. * * 32bit entry point into the kernel. When requested to launch the * guest kernel in a HVM container, Xen will use this entry point to * launch the guest in 32bit protected mode with paging disabled. * Ignored otherwise. */ #define XEN_ELFNOTE_PHYS32_ENTRY … /* * The number of the highest elfnote defined. */ #define XEN_ELFNOTE_MAX … #endif /* __XEN_PUBLIC_ELFNOTE_H__ */
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