| /* SPDX-License-Identifier: MIT */ |
| /* |
| * Copyright (c) 2016, Citrix Systems, Inc. |
| */ |
| |
| #ifndef __XEN_PUBLIC_ARCH_X86_HVM_START_INFO_H__ |
| #define __XEN_PUBLIC_ARCH_X86_HVM_START_INFO_H__ |
| |
| /* |
| * Start of day structure passed to PVH guests and to HVM guests in %ebx. |
| * |
| * NOTE: nothing will be loaded at physical address 0, so a 0 value in any |
| * of the address fields should be treated as not present. |
| * |
| * 0 +----------------+ |
| * | magic | Contains the magic value XEN_HVM_START_MAGIC_VALUE |
| * | | ("xEn3" with the 0x80 bit of the "E" set). |
| * 4 +----------------+ |
| * | version | Version of this structure. Current version is 1. New |
| * | | versions are guaranteed to be backwards-compatible. |
| * 8 +----------------+ |
| * | flags | SIF_xxx flags. |
| * 12 +----------------+ |
| * | nr_modules | Number of modules passed to the kernel. |
| * 16 +----------------+ |
| * | modlist_paddr | Physical address of an array of modules |
| * | | (layout of the structure below). |
| * 24 +----------------+ |
| * | cmdline_paddr | Physical address of the command line, |
| * | | a zero-terminated ASCII string. |
| * 32 +----------------+ |
| * | rsdp_paddr | Physical address of the RSDP ACPI data structure. |
| * 40 +----------------+ |
| * | memmap_paddr | Physical address of the (optional) memory map. Only |
| * | | present in version 1 and newer of the structure. |
| * 48 +----------------+ |
| * | memmap_entries | Number of entries in the memory map table. Zero |
| * | | if there is no memory map being provided. Only |
| * | | present in version 1 and newer of the structure. |
| * 52 +----------------+ |
| * | reserved | Version 1 and newer only. |
| * 56 +----------------+ |
| * |
| * The layout of each entry in the module structure is the following: |
| * |
| * 0 +----------------+ |
| * | paddr | Physical address of the module. |
| * 8 +----------------+ |
| * | size | Size of the module in bytes. |
| * 16 +----------------+ |
| * | cmdline_paddr | Physical address of the command line, |
| * | | a zero-terminated ASCII string. |
| * 24 +----------------+ |
| * | reserved | |
| * 32 +----------------+ |
| * |
| * The layout of each entry in the memory map table is as follows: |
| * |
| * 0 +----------------+ |
| * | addr | Base address |
| * 8 +----------------+ |
| * | size | Size of mapping in bytes |
| * 16 +----------------+ |
| * | type | Type of mapping as defined between the hypervisor |
| * | | and guest. See XEN_HVM_MEMMAP_TYPE_* values below. |
| * 20 +----------------| |
| * | reserved | |
| * 24 +----------------+ |
| * |
| * The address and sizes are always a 64bit little endian unsigned integer. |
| * |
| * NB: Xen on x86 will always try to place all the data below the 4GiB |
| * boundary. |
| * |
| * Version numbers of the hvm_start_info structure have evolved like this: |
| * |
| * Version 0: Initial implementation. |
| * |
| * Version 1: Added the memmap_paddr/memmap_entries fields (plus 4 bytes of |
| * padding) to the end of the hvm_start_info struct. These new |
| * fields can be used to pass a memory map to the guest. The |
| * memory map is optional and so guests that understand version 1 |
| * of the structure must check that memmap_entries is non-zero |
| * before trying to read the memory map. |
| */ |
| #define XEN_HVM_START_MAGIC_VALUE 0x336ec578 |
| |
| /* |
| * The values used in the type field of the memory map table entries are |
| * defined below and match the Address Range Types as defined in the "System |
| * Address Map Interfaces" section of the ACPI Specification. Please refer to |
| * section 15 in version 6.2 of the ACPI spec: http://uefi.org/specifications |
| */ |
| #define XEN_HVM_MEMMAP_TYPE_RAM 1 |
| #define XEN_HVM_MEMMAP_TYPE_RESERVED 2 |
| #define XEN_HVM_MEMMAP_TYPE_ACPI 3 |
| #define XEN_HVM_MEMMAP_TYPE_NVS 4 |
| #define XEN_HVM_MEMMAP_TYPE_UNUSABLE 5 |
| #define XEN_HVM_MEMMAP_TYPE_DISABLED 6 |
| #define XEN_HVM_MEMMAP_TYPE_PMEM 7 |
| |
| /* |
| * C representation of the x86/HVM start info layout. |
| * |
| * The canonical definition of this layout is above, this is just a way to |
| * represent the layout described there using C types. |
| */ |
| struct hvm_start_info { |
| uint32_t magic; /* Contains the magic value 0x336ec578 */ |
| /* ("xEn3" with the 0x80 bit of the "E" set).*/ |
| uint32_t version; /* Version of this structure. */ |
| uint32_t flags; /* SIF_xxx flags. */ |
| uint32_t nr_modules; /* Number of modules passed to the kernel. */ |
| uint64_t modlist_paddr; /* Physical address of an array of */ |
| /* hvm_modlist_entry. */ |
| uint64_t cmdline_paddr; /* Physical address of the command line. */ |
| uint64_t rsdp_paddr; /* Physical address of the RSDP ACPI data */ |
| /* structure. */ |
| /* All following fields only present in version 1 and newer */ |
| uint64_t memmap_paddr; /* Physical address of an array of */ |
| /* hvm_memmap_table_entry. */ |
| uint32_t memmap_entries; /* Number of entries in the memmap table. */ |
| /* Value will be zero if there is no memory */ |
| /* map being provided. */ |
| uint32_t reserved; /* Must be zero. */ |
| }; |
| |
| struct hvm_modlist_entry { |
| uint64_t paddr; /* Physical address of the module. */ |
| uint64_t size; /* Size of the module in bytes. */ |
| uint64_t cmdline_paddr; /* Physical address of the command line. */ |
| uint64_t reserved; |
| }; |
| |
| struct hvm_memmap_table_entry { |
| uint64_t addr; /* Base address of the memory region */ |
| uint64_t size; /* Size of the memory region in bytes */ |
| uint32_t type; /* Mapping type */ |
| uint32_t reserved; /* Must be zero for Version 1. */ |
| }; |
| |
| #endif /* __XEN_PUBLIC_ARCH_X86_HVM_START_INFO_H__ */ |
