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) { } 41#endif 42 43int crash_check_update_elfcorehdr(void); 44 45#ifndef crash_hotplug_cpu_support 46static inline int crash_hotplug_cpu_support(void) { return 0; } 47#endif 48 49#ifndef crash_hotplug_memory_support 50static inline int crash_hotplug_memory_support(void) { return 0; } 51#endif 52 53#ifndef crash_get_elfcorehdr_size 54static inline unsigned int crash_get_elfcorehdr_size(void) { return 0; } 55#endif 56 57/* Alignment required for elf header segment */ 58#define ELF_CORE_HEADER_ALIGN 4096 59 60extern int crash_exclude_mem_range(struct crash_mem *mem, 61 unsigned long long mstart, 62 unsigned long long mend); 63extern int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map, 64 void **addr, unsigned long *sz); 65 66struct kimage; 67struct 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 76extern void __crash_kexec(struct pt_regs *regs); 77extern void crash_kexec(struct pt_regs *regs); 78int kexec_should_crash(struct task_struct *p); 79int kexec_crash_loaded(void); 80void crash_save_cpu(struct pt_regs *regs, int cpu); 81extern int kimage_crash_copy_vmcoreinfo(struct kimage *image); 82 83#else /* !CONFIG_CRASH_DUMP*/ 84struct pt_regs; 85struct task_struct; 86struct kimage; 87static inline void __crash_kexec(struct pt_regs *regs) { } 88static inline void crash_kexec(struct pt_regs *regs) { } 89static inline int kexec_should_crash(struct task_struct *p) { return 0; } 90static inline int kexec_crash_loaded(void) { return 0; } 91static inline void crash_save_cpu(struct pt_regs *regs, int cpu) {}; 92static inline int kimage_crash_copy_vmcoreinfo(struct kimage *image) { return 0; }; 93#endif /* CONFIG_CRASH_DUMP*/ 94 95#endif /* LINUX_CRASH_CORE_H */ 96