Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
9struct kimage;
10
11struct 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
19int crash_shrink_memory(unsigned long new_size);
20ssize_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 */
30static inline void arch_kexec_protect_crashkres(void) { }
31#endif
32
33#ifndef arch_kexec_unprotect_crashkres
34static inline void arch_kexec_unprotect_crashkres(void) { }
35#endif
36
37
38
39#ifndef arch_crash_handle_hotplug_event
40static inline void arch_crash_handle_hotplug_event(struct kimage *image, void *arg) { }
41#endif
42
43int crash_check_hotplug_support(void);
44
45#ifndef arch_crash_hotplug_support
46static inline int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags)
47{
48 return 0;
49}
50#endif
51
52#ifndef crash_get_elfcorehdr_size
53static inline unsigned int crash_get_elfcorehdr_size(void) { return 0; }
54#endif
55
56/* Alignment required for elf header segment */
57#define ELF_CORE_HEADER_ALIGN 4096
58
59extern int crash_exclude_mem_range(struct crash_mem *mem,
60 unsigned long long mstart,
61 unsigned long long mend);
62extern int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map,
63 void **addr, unsigned long *sz);
64
65struct kimage;
66struct kexec_segment;
67
68#define KEXEC_CRASH_HP_NONE 0
69#define KEXEC_CRASH_HP_ADD_CPU 1
70#define KEXEC_CRASH_HP_REMOVE_CPU 2
71#define KEXEC_CRASH_HP_ADD_MEMORY 3
72#define KEXEC_CRASH_HP_REMOVE_MEMORY 4
73#define KEXEC_CRASH_HP_INVALID_CPU -1U
74
75extern void __crash_kexec(struct pt_regs *regs);
76extern void crash_kexec(struct pt_regs *regs);
77int kexec_should_crash(struct task_struct *p);
78int kexec_crash_loaded(void);
79void crash_save_cpu(struct pt_regs *regs, int cpu);
80extern int kimage_crash_copy_vmcoreinfo(struct kimage *image);
81
82#else /* !CONFIG_CRASH_DUMP*/
83struct pt_regs;
84struct task_struct;
85struct kimage;
86static inline void __crash_kexec(struct pt_regs *regs) { }
87static inline void crash_kexec(struct pt_regs *regs) { }
88static inline int kexec_should_crash(struct task_struct *p) { return 0; }
89static inline int kexec_crash_loaded(void) { return 0; }
90static inline void crash_save_cpu(struct pt_regs *regs, int cpu) {};
91static inline int kimage_crash_copy_vmcoreinfo(struct kimage *image) { return 0; };
92#endif /* CONFIG_CRASH_DUMP*/
93
94#endif /* LINUX_CRASH_CORE_H */