/root/src/xen/xen/include/public/hvm/hvm_info_table.h
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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 | 0 | #define HVM_MAX_VCPUS 128 |
36 | | |
37 | | /* |
38 | | * In some cases SMP HVM guests may require knowledge of Xen's idea of vCPU ids |
39 | | * for their vCPUs. For example, HYPERVISOR_vcpu_op and some EVTCHNOP_* |
40 | | * hypercalls take vcpu id as a parameter. It is valid for HVM guests to assume |
41 | | * that Xen's vCPU id always equals to ACPI (not APIC!) id in MADT table which |
42 | | * is always present for SMP guests. |
43 | | */ |
44 | | |
45 | | struct hvm_info_table { |
46 | | char signature[8]; /* "HVM INFO" */ |
47 | | uint32_t length; |
48 | | uint8_t checksum; |
49 | | |
50 | | /* Should firmware build APIC descriptors (APIC MADT / MP BIOS)? */ |
51 | | uint8_t apic_mode; |
52 | | |
53 | | /* How many CPUs does this domain have? */ |
54 | | uint32_t nr_vcpus; |
55 | | |
56 | | /* |
57 | | * MEMORY MAP provided by HVM domain builder. |
58 | | * Notes: |
59 | | * 1. page_to_phys(x) = x << 12 |
60 | | * 2. If a field is zero, the corresponding range does not exist. |
61 | | */ |
62 | | /* |
63 | | * 0x0 to page_to_phys(low_mem_pgend)-1: |
64 | | * RAM below 4GB (except for VGA hole 0xA0000-0xBFFFF) |
65 | | */ |
66 | | uint32_t low_mem_pgend; |
67 | | /* |
68 | | * page_to_phys(reserved_mem_pgstart) to 0xFFFFFFFF: |
69 | | * Reserved for special memory mappings |
70 | | */ |
71 | | uint32_t reserved_mem_pgstart; |
72 | | /* |
73 | | * 0x100000000 to page_to_phys(high_mem_pgend)-1: |
74 | | * RAM above 4GB |
75 | | */ |
76 | | uint32_t high_mem_pgend; |
77 | | |
78 | | /* Bitmap of which CPUs are online at boot time. */ |
79 | | uint8_t vcpu_online[(HVM_MAX_VCPUS + 7)/8]; |
80 | | }; |
81 | | |
82 | | #endif /* __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__ */ |