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dc009d92 EB |
1 | #ifndef LINUX_KEXEC_H |
2 | #define LINUX_KEXEC_H | |
3 | ||
4 | #ifdef CONFIG_KEXEC | |
5 | #include <linux/types.h> | |
6 | #include <linux/list.h> | |
7 | #include <linux/linkage.h> | |
8 | #include <linux/compat.h> | |
9c15e852 | 9 | #include <linux/ioport.h> |
6672f76a SH |
10 | #include <linux/elfcore.h> |
11 | #include <linux/elf.h> | |
dc009d92 EB |
12 | #include <asm/kexec.h> |
13 | ||
14 | /* Verify architecture specific macros are defined */ | |
15 | ||
16 | #ifndef KEXEC_SOURCE_MEMORY_LIMIT | |
17 | #error KEXEC_SOURCE_MEMORY_LIMIT not defined | |
18 | #endif | |
19 | ||
20 | #ifndef KEXEC_DESTINATION_MEMORY_LIMIT | |
21 | #error KEXEC_DESTINATION_MEMORY_LIMIT not defined | |
22 | #endif | |
23 | ||
24 | #ifndef KEXEC_CONTROL_MEMORY_LIMIT | |
25 | #error KEXEC_CONTROL_MEMORY_LIMIT not defined | |
26 | #endif | |
27 | ||
163f6876 HY |
28 | #ifndef KEXEC_CONTROL_PAGE_SIZE |
29 | #error KEXEC_CONTROL_PAGE_SIZE not defined | |
dc009d92 EB |
30 | #endif |
31 | ||
32 | #ifndef KEXEC_ARCH | |
33 | #error KEXEC_ARCH not defined | |
34 | #endif | |
35 | ||
3d214fae MH |
36 | #ifndef KEXEC_CRASH_CONTROL_MEMORY_LIMIT |
37 | #define KEXEC_CRASH_CONTROL_MEMORY_LIMIT KEXEC_CONTROL_MEMORY_LIMIT | |
38 | #endif | |
39 | ||
558df720 MH |
40 | #ifndef KEXEC_CRASH_MEM_ALIGN |
41 | #define KEXEC_CRASH_MEM_ALIGN PAGE_SIZE | |
42 | #endif | |
43 | ||
6672f76a SH |
44 | #define KEXEC_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4) |
45 | #define KEXEC_CORE_NOTE_NAME "CORE" | |
46 | #define KEXEC_CORE_NOTE_NAME_BYTES ALIGN(sizeof(KEXEC_CORE_NOTE_NAME), 4) | |
47 | #define KEXEC_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4) | |
48 | /* | |
49 | * The per-cpu notes area is a list of notes terminated by a "NULL" | |
50 | * note header. For kdump, the code in vmcore.c runs in the context | |
51 | * of the second kernel to combine them into one note. | |
52 | */ | |
53 | #define KEXEC_NOTE_BYTES ( (KEXEC_NOTE_HEAD_BYTES * 2) + \ | |
54 | KEXEC_CORE_NOTE_NAME_BYTES + \ | |
55 | KEXEC_CORE_NOTE_DESC_BYTES ) | |
56 | ||
dc009d92 EB |
57 | /* |
58 | * This structure is used to hold the arguments that are used when loading | |
59 | * kernel binaries. | |
60 | */ | |
61 | ||
62 | typedef unsigned long kimage_entry_t; | |
63 | #define IND_DESTINATION 0x1 | |
64 | #define IND_INDIRECTION 0x2 | |
65 | #define IND_DONE 0x4 | |
66 | #define IND_SOURCE 0x8 | |
67 | ||
720e1a9f | 68 | #define KEXEC_SEGMENT_MAX 16 |
dc009d92 EB |
69 | struct kexec_segment { |
70 | void __user *buf; | |
71 | size_t bufsz; | |
72 | unsigned long mem; /* User space sees this as a (void *) ... */ | |
73 | size_t memsz; | |
74 | }; | |
75 | ||
76 | #ifdef CONFIG_COMPAT | |
77 | struct compat_kexec_segment { | |
78 | compat_uptr_t buf; | |
79 | compat_size_t bufsz; | |
80 | compat_ulong_t mem; /* User space sees this as a (void *) ... */ | |
81 | compat_size_t memsz; | |
82 | }; | |
83 | #endif | |
84 | ||
85 | struct kimage { | |
86 | kimage_entry_t head; | |
87 | kimage_entry_t *entry; | |
88 | kimage_entry_t *last_entry; | |
89 | ||
90 | unsigned long destination; | |
91 | ||
92 | unsigned long start; | |
93 | struct page *control_code_page; | |
3ab83521 | 94 | struct page *swap_page; |
dc009d92 EB |
95 | |
96 | unsigned long nr_segments; | |
97 | struct kexec_segment segment[KEXEC_SEGMENT_MAX]; | |
98 | ||
99 | struct list_head control_pages; | |
100 | struct list_head dest_pages; | |
101 | struct list_head unuseable_pages; | |
102 | ||
103 | /* Address of next control page to allocate for crash kernels. */ | |
104 | unsigned long control_page; | |
105 | ||
106 | /* Flags to indicate special processing */ | |
107 | unsigned int type : 1; | |
108 | #define KEXEC_TYPE_DEFAULT 0 | |
109 | #define KEXEC_TYPE_CRASH 1 | |
3ab83521 | 110 | unsigned int preserve_context : 1; |
92be3d6b HY |
111 | |
112 | #ifdef ARCH_HAS_KIMAGE_ARCH | |
113 | struct kimage_arch arch; | |
114 | #endif | |
dc009d92 EB |
115 | }; |
116 | ||
117 | ||
118 | ||
119 | /* kexec interface functions */ | |
3ab83521 | 120 | extern void machine_kexec(struct kimage *image); |
dc009d92 EB |
121 | extern int machine_kexec_prepare(struct kimage *image); |
122 | extern void machine_kexec_cleanup(struct kimage *image); | |
123 | extern asmlinkage long sys_kexec_load(unsigned long entry, | |
72414d3f MS |
124 | unsigned long nr_segments, |
125 | struct kexec_segment __user *segments, | |
126 | unsigned long flags); | |
3ab83521 | 127 | extern int kernel_kexec(void); |
dc009d92 EB |
128 | #ifdef CONFIG_COMPAT |
129 | extern asmlinkage long compat_sys_kexec_load(unsigned long entry, | |
72414d3f MS |
130 | unsigned long nr_segments, |
131 | struct compat_kexec_segment __user *segments, | |
132 | unsigned long flags); | |
dc009d92 | 133 | #endif |
72414d3f MS |
134 | extern struct page *kimage_alloc_control_pages(struct kimage *image, |
135 | unsigned int order); | |
6e274d14 AN |
136 | extern void crash_kexec(struct pt_regs *); |
137 | int kexec_should_crash(struct task_struct *); | |
85916f81 | 138 | void crash_save_cpu(struct pt_regs *regs, int cpu); |
fd59d231 | 139 | void crash_save_vmcoreinfo(void); |
558df720 MH |
140 | void crash_map_reserved_pages(void); |
141 | void crash_unmap_reserved_pages(void); | |
fd59d231 | 142 | void arch_crash_save_vmcoreinfo(void); |
b9075fa9 JP |
143 | __printf(1, 2) |
144 | void vmcoreinfo_append_str(const char *fmt, ...); | |
fd59d231 KO |
145 | unsigned long paddr_vmcoreinfo_note(void); |
146 | ||
c6e2bee2 BW |
147 | #define VMCOREINFO_OSRELEASE(value) \ |
148 | vmcoreinfo_append_str("OSRELEASE=%s\n", value) | |
bba1f603 KO |
149 | #define VMCOREINFO_PAGESIZE(value) \ |
150 | vmcoreinfo_append_str("PAGESIZE=%ld\n", value) | |
bcbba6c1 | 151 | #define VMCOREINFO_SYMBOL(name) \ |
fd59d231 | 152 | vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name) |
bcbba6c1 | 153 | #define VMCOREINFO_SIZE(name) \ |
6cfa062f KO |
154 | vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \ |
155 | (unsigned long)sizeof(name)) | |
c76f860c KO |
156 | #define VMCOREINFO_STRUCT_SIZE(name) \ |
157 | vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \ | |
158 | (unsigned long)sizeof(struct name)) | |
bcbba6c1 | 159 | #define VMCOREINFO_OFFSET(name, field) \ |
d768281e | 160 | vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \ |
1e4f2955 | 161 | (unsigned long)offsetof(struct name, field)) |
bcbba6c1 | 162 | #define VMCOREINFO_LENGTH(name, value) \ |
d768281e | 163 | vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value) |
bcbba6c1 | 164 | #define VMCOREINFO_NUMBER(name) \ |
6cfa062f | 165 | vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name) |
bcbba6c1 | 166 | #define VMCOREINFO_CONFIG(name) \ |
fd59d231 KO |
167 | vmcoreinfo_append_str("CONFIG_%s=y\n", #name) |
168 | ||
dc009d92 | 169 | extern struct kimage *kexec_image; |
c330dda9 | 170 | extern struct kimage *kexec_crash_image; |
dc009d92 | 171 | |
a7956113 ZN |
172 | #ifndef kexec_flush_icache_page |
173 | #define kexec_flush_icache_page(page) | |
174 | #endif | |
175 | ||
3ab83521 HY |
176 | #define KEXEC_ON_CRASH 0x00000001 |
177 | #define KEXEC_PRESERVE_CONTEXT 0x00000002 | |
178 | #define KEXEC_ARCH_MASK 0xffff0000 | |
dc009d92 EB |
179 | |
180 | /* These values match the ELF architecture values. | |
181 | * Unless there is a good reason that should continue to be the case. | |
182 | */ | |
183 | #define KEXEC_ARCH_DEFAULT ( 0 << 16) | |
184 | #define KEXEC_ARCH_386 ( 3 << 16) | |
185 | #define KEXEC_ARCH_X86_64 (62 << 16) | |
186 | #define KEXEC_ARCH_PPC (20 << 16) | |
187 | #define KEXEC_ARCH_PPC64 (21 << 16) | |
188 | #define KEXEC_ARCH_IA_64 (50 << 16) | |
c587e4a6 | 189 | #define KEXEC_ARCH_ARM (40 << 16) |
cf13f0ea | 190 | #define KEXEC_ARCH_S390 (22 << 16) |
9d44190e | 191 | #define KEXEC_ARCH_SH (42 << 16) |
583bb86f NS |
192 | #define KEXEC_ARCH_MIPS_LE (10 << 16) |
193 | #define KEXEC_ARCH_MIPS ( 8 << 16) | |
dc009d92 | 194 | |
3ab83521 HY |
195 | /* List of defined/legal kexec flags */ |
196 | #ifndef CONFIG_KEXEC_JUMP | |
197 | #define KEXEC_FLAGS KEXEC_ON_CRASH | |
198 | #else | |
199 | #define KEXEC_FLAGS (KEXEC_ON_CRASH | KEXEC_PRESERVE_CONTEXT) | |
200 | #endif | |
dc009d92 | 201 | |
fd59d231 KO |
202 | #define VMCOREINFO_BYTES (4096) |
203 | #define VMCOREINFO_NOTE_NAME "VMCOREINFO" | |
204 | #define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4) | |
205 | #define VMCOREINFO_NOTE_SIZE (KEXEC_NOTE_HEAD_BYTES*2 + VMCOREINFO_BYTES \ | |
206 | + VMCOREINFO_NOTE_NAME_BYTES) | |
207 | ||
dc009d92 EB |
208 | /* Location of a reserved region to hold the crash kernel. |
209 | */ | |
210 | extern struct resource crashk_res; | |
6672f76a | 211 | typedef u32 note_buf_t[KEXEC_NOTE_BYTES/4]; |
43cf38eb | 212 | extern note_buf_t __percpu *crash_notes; |
fd59d231 | 213 | extern u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4]; |
d768281e KO |
214 | extern size_t vmcoreinfo_size; |
215 | extern size_t vmcoreinfo_max_size; | |
dc009d92 | 216 | |
cba63c30 BW |
217 | int __init parse_crashkernel(char *cmdline, unsigned long long system_ram, |
218 | unsigned long long *crash_size, unsigned long long *crash_base); | |
06a7f711 AW |
219 | int crash_shrink_memory(unsigned long new_size); |
220 | size_t crash_get_memory_size(void); | |
c0bb9e45 | 221 | void crash_free_reserved_phys_range(unsigned long begin, unsigned long end); |
a7956113 | 222 | |
dc009d92 | 223 | #else /* !CONFIG_KEXEC */ |
6e274d14 AN |
224 | struct pt_regs; |
225 | struct task_struct; | |
226 | static inline void crash_kexec(struct pt_regs *regs) { } | |
227 | static inline int kexec_should_crash(struct task_struct *p) { return 0; } | |
dc009d92 EB |
228 | #endif /* CONFIG_KEXEC */ |
229 | #endif /* LINUX_KEXEC_H */ |