1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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 | |
9 | struct kimage; |
10 | |
11 | struct crash_mem { |
12 | unsigned int max_nr_ranges; |
13 | unsigned int nr_ranges; |
14 | struct range ranges[] __counted_by(max_nr_ranges); |
15 | }; |
16 | |
17 | #ifdef CONFIG_CRASH_DUMP |
18 | |
19 | int crash_shrink_memory(unsigned long new_size); |
20 | ssize_t crash_get_memory_size(void); |
21 | |
22 | #ifndef arch_kexec_protect_crashkres |
23 | /* |
24 | * Protection mechanism for crashkernel reserved memory after |
25 | * the kdump kernel is loaded. |
26 | * |
27 | * Provide an empty default implementation here -- architecture |
28 | * code may override this |
29 | */ |
30 | static inline void arch_kexec_protect_crashkres(void) { } |
31 | #endif |
32 | |
33 | #ifndef arch_kexec_unprotect_crashkres |
34 | static inline void arch_kexec_unprotect_crashkres(void) { } |
35 | #endif |
36 | |
37 | |
38 | |
39 | #ifndef arch_crash_handle_hotplug_event |
40 | static inline void arch_crash_handle_hotplug_event(struct kimage *image) { } |
41 | #endif |
42 | |
43 | int crash_check_update_elfcorehdr(void); |
44 | |
45 | #ifndef crash_hotplug_cpu_support |
46 | static inline int crash_hotplug_cpu_support(void) { return 0; } |
47 | #endif |
48 | |
49 | #ifndef crash_hotplug_memory_support |
50 | static inline int crash_hotplug_memory_support(void) { return 0; } |
51 | #endif |
52 | |
53 | #ifndef crash_get_elfcorehdr_size |
54 | static inline unsigned int crash_get_elfcorehdr_size(void) { return 0; } |
55 | #endif |
56 | |
57 | /* Alignment required for elf header segment */ |
58 | #define 4096 |
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 (struct crash_mem *mem, int need_kernel_map, |
64 | void **addr, unsigned long *sz); |
65 | |
66 | struct kimage; |
67 | struct kexec_segment; |
68 | |
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 | |
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 | |
95 | #endif /* LINUX_CRASH_CORE_H */ |
96 | |