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 */ arch_kexec_protect_crashkres(void)30static inline void arch_kexec_protect_crashkres(void) { } 31 #endif 32 33 #ifndef arch_kexec_unprotect_crashkres arch_kexec_unprotect_crashkres(void)34static inline void arch_kexec_unprotect_crashkres(void) { } 35 #endif 36 37 38 39 #ifndef arch_crash_handle_hotplug_event arch_crash_handle_hotplug_event(struct kimage * image)40static 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 crash_hotplug_cpu_support(void)46static inline int crash_hotplug_cpu_support(void) { return 0; } 47 #endif 48 49 #ifndef crash_hotplug_memory_support crash_hotplug_memory_support(void)50static inline int crash_hotplug_memory_support(void) { return 0; } 51 #endif 52 53 #ifndef crash_get_elfcorehdr_size crash_get_elfcorehdr_size(void)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 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 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; __crash_kexec(struct pt_regs * regs)87static inline void __crash_kexec(struct pt_regs *regs) { } crash_kexec(struct pt_regs * regs)88static inline void crash_kexec(struct pt_regs *regs) { } kexec_should_crash(struct task_struct * p)89static inline int kexec_should_crash(struct task_struct *p) { return 0; } kexec_crash_loaded(void)90static inline int kexec_crash_loaded(void) { return 0; } crash_save_cpu(struct pt_regs * regs,int cpu)91static inline void crash_save_cpu(struct pt_regs *regs, int cpu) {}; kimage_crash_copy_vmcoreinfo(struct kimage * image)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