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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
692f66f2 HB |
2 | #ifndef LINUX_CRASH_CORE_H |
3 | #define LINUX_CRASH_CORE_H | |
4 | ||
5 | #include <linux/linkage.h> | |
6 | #include <linux/elfcore.h> | |
7 | #include <linux/elf.h> | |
8 | ||
02aff848 BH |
9 | struct kimage; |
10 | ||
11 | #ifdef CONFIG_CRASH_DUMP | |
12 | ||
13 | int crash_shrink_memory(unsigned long new_size); | |
14 | ssize_t crash_get_memory_size(void); | |
15 | ||
16 | #ifndef arch_kexec_protect_crashkres | |
17 | /* | |
18 | * Protection mechanism for crashkernel reserved memory after | |
19 | * the kdump kernel is loaded. | |
20 | * | |
21 | * Provide an empty default implementation here -- architecture | |
22 | * code may override this | |
23 | */ | |
24 | static inline void arch_kexec_protect_crashkres(void) { } | |
25 | #endif | |
26 | ||
27 | #ifndef arch_kexec_unprotect_crashkres | |
28 | static inline void arch_kexec_unprotect_crashkres(void) { } | |
29 | #endif | |
30 | ||
31 | ||
32 | ||
33 | #ifndef arch_crash_handle_hotplug_event | |
34 | static inline void arch_crash_handle_hotplug_event(struct kimage *image) { } | |
35 | #endif | |
36 | ||
37 | int crash_check_update_elfcorehdr(void); | |
38 | ||
39 | #ifndef crash_hotplug_cpu_support | |
40 | static inline int crash_hotplug_cpu_support(void) { return 0; } | |
41 | #endif | |
42 | ||
43 | #ifndef crash_hotplug_memory_support | |
44 | static inline int crash_hotplug_memory_support(void) { return 0; } | |
45 | #endif | |
46 | ||
47 | #ifndef crash_get_elfcorehdr_size | |
48 | static inline unsigned int crash_get_elfcorehdr_size(void) { return 0; } | |
49 | #endif | |
50 | ||
6f991cc3 ED |
51 | /* Alignment required for elf header segment */ |
52 | #define ELF_CORE_HEADER_ALIGN 4096 | |
53 | ||
54 | struct crash_mem { | |
55 | unsigned int max_nr_ranges; | |
56 | unsigned int nr_ranges; | |
15fcedd4 | 57 | struct range ranges[] __counted_by(max_nr_ranges); |
6f991cc3 ED |
58 | }; |
59 | ||
60 | extern int crash_exclude_mem_range(struct crash_mem *mem, | |
61 | unsigned long long mstart, | |
62 | unsigned long long mend); | |
63 | extern int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map, | |
64 | void **addr, unsigned long *sz); | |
65 | ||
66 | struct kimage; | |
67 | struct kexec_segment; | |
68 | ||
24726275 ED |
69 | #define KEXEC_CRASH_HP_NONE 0 |
70 | #define KEXEC_CRASH_HP_ADD_CPU 1 | |
71 | #define KEXEC_CRASH_HP_REMOVE_CPU 2 | |
72 | #define KEXEC_CRASH_HP_ADD_MEMORY 3 | |
73 | #define KEXEC_CRASH_HP_REMOVE_MEMORY 4 | |
74 | #define KEXEC_CRASH_HP_INVALID_CPU -1U | |
75 | ||
02aff848 BH |
76 | extern void __crash_kexec(struct pt_regs *regs); |
77 | extern void crash_kexec(struct pt_regs *regs); | |
78 | int kexec_should_crash(struct task_struct *p); | |
79 | int kexec_crash_loaded(void); | |
80 | void crash_save_cpu(struct pt_regs *regs, int cpu); | |
81 | extern int kimage_crash_copy_vmcoreinfo(struct kimage *image); | |
82 | ||
83 | #else /* !CONFIG_CRASH_DUMP*/ | |
84 | struct pt_regs; | |
85 | struct task_struct; | |
86 | struct kimage; | |
87 | static inline void __crash_kexec(struct pt_regs *regs) { } | |
88 | static inline void crash_kexec(struct pt_regs *regs) { } | |
89 | static inline int kexec_should_crash(struct task_struct *p) { return 0; } | |
90 | static inline int kexec_crash_loaded(void) { return 0; } | |
91 | static inline void crash_save_cpu(struct pt_regs *regs, int cpu) {}; | |
92 | static inline int kimage_crash_copy_vmcoreinfo(struct kimage *image) { return 0; }; | |
93 | #endif /* CONFIG_CRASH_DUMP*/ | |
94 | ||
692f66f2 | 95 | #endif /* LINUX_CRASH_CORE_H */ |