1/******************************************************************************
2 * hvm/hvm_info_table.h
3 *
4 * HVM parameter and information table, written into guest memory map.
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
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.
23 *
24 * Copyright (c) 2006, Keir Fraser
25 */
26
27#ifndef __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__
28#define __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__
29
30#define HVM_INFO_PFN         0x09F
31#define HVM_INFO_OFFSET      0x800
32#define HVM_INFO_PADDR       ((HVM_INFO_PFN << 12) + HVM_INFO_OFFSET)
33
34/* Maximum we can support with current vLAPIC ID mapping. */
35#define HVM_MAX_VCPUS        128
36
37struct hvm_info_table {
38    char        signature[8]; /* "HVM INFO" */
39    uint32_t    length;
40    uint8_t     checksum;
41
42    /* Should firmware build APIC descriptors (APIC MADT / MP BIOS)? */
43    uint8_t     apic_mode;
44
45    /* How many CPUs does this domain have? */
46    uint32_t    nr_vcpus;
47
48    /*
49     * MEMORY MAP provided by HVM domain builder.
50     * Notes:
51     *  1. page_to_phys(x) = x << 12
52     *  2. If a field is zero, the corresponding range does not exist.
53     */
54    /*
55     *  0x0 to page_to_phys(low_mem_pgend)-1:
56     *    RAM below 4GB (except for VGA hole 0xA0000-0xBFFFF)
57     */
58    uint32_t    low_mem_pgend;
59    /*
60     *  page_to_phys(reserved_mem_pgstart) to 0xFFFFFFFF:
61     *    Reserved for special memory mappings
62     */
63    uint32_t    reserved_mem_pgstart;
64    /*
65     *  0x100000000 to page_to_phys(high_mem_pgend)-1:
66     *    RAM above 4GB
67     */
68    uint32_t    high_mem_pgend;
69
70    /* Bitmap of which CPUs are online at boot time. */
71    uint8_t     vcpu_online[(HVM_MAX_VCPUS + 7)/8];
72};
73
74#endif /* __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__ */
75