1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef LINUX_CRASH_CORE_H
3 #define LINUX_CRASH_CORE_H
5 #include <linux/linkage.h>
6 #include <linux/elfcore.h>
12 unsigned int max_nr_ranges;
13 unsigned int nr_ranges;
14 struct range ranges[] __counted_by(max_nr_ranges);
17 #ifdef CONFIG_CRASH_DUMP
19 int crash_shrink_memory(unsigned long new_size);
20 ssize_t crash_get_memory_size(void);
22 #ifndef arch_kexec_protect_crashkres
24 * Protection mechanism for crashkernel reserved memory after
25 * the kdump kernel is loaded.
27 * Provide an empty default implementation here -- architecture
28 * code may override this
30 static inline void arch_kexec_protect_crashkres(void) { }
33 #ifndef arch_kexec_unprotect_crashkres
34 static inline void arch_kexec_unprotect_crashkres(void) { }
39 #ifndef arch_crash_handle_hotplug_event
40 static inline void arch_crash_handle_hotplug_event(struct kimage *image) { }
43 int crash_check_update_elfcorehdr(void);
45 #ifndef crash_hotplug_cpu_support
46 static inline int crash_hotplug_cpu_support(void) { return 0; }
49 #ifndef crash_hotplug_memory_support
50 static inline int crash_hotplug_memory_support(void) { return 0; }
53 #ifndef crash_get_elfcorehdr_size
54 static inline unsigned int crash_get_elfcorehdr_size(void) { return 0; }
57 /* Alignment required for elf header segment */
58 #define ELF_CORE_HEADER_ALIGN 4096
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);
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
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);
83 #else /* !CONFIG_CRASH_DUMP*/
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*/
95 #endif /* LINUX_CRASH_CORE_H */