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