| | 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 | #ifdef CONFIG_CRASH_DM_CRYPT |
| | 38 | int crash_load_dm_crypt_keys(struct kimage *image); |
| | 39 | ssize_t dm_crypt_keys_read(char *buf, size_t count, u64 *ppos); |
| | 40 | #else |
| | 41 | static inline int crash_load_dm_crypt_keys(struct kimage *image) {return 0; } |
| | 42 | #endif |
| | 43 | |
| | 44 | #ifndef arch_crash_handle_hotplug_event |
| | 45 | static inline void arch_crash_handle_hotplug_event(struct kimage *image, void *arg) { } |
| | 46 | #endif |
| | 47 | |
| | 48 | int crash_check_hotplug_support(void); |
| | 49 | |
| | 50 | #ifndef arch_crash_hotplug_support |
| | 51 | static inline int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags) |
| | 52 | { |
| | 53 | return 0; |
| | 54 | } |
| | 55 | #endif |
| | 56 | |
| | 57 | #ifndef crash_get_elfcorehdr_size |
| | 58 | static inline unsigned int crash_get_elfcorehdr_size(void) { return 0; } |
| | 59 | #endif |
| | 60 | |
| | 61 | /* Alignment required for elf header segment */ |
| | 62 | #define ELF_CORE_HEADER_ALIGN 4096 |
| | 63 | |
| | 64 | extern int crash_exclude_mem_range(struct crash_mem *mem, |
| | 65 | unsigned long long mstart, |
| | 66 | unsigned long long mend); |
| | 67 | extern int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map, |
| | 68 | void **addr, unsigned long *sz); |
| | 69 | |
| | 70 | struct kimage; |
| | 71 | struct kexec_segment; |
| | 72 | |
| | 73 | #define KEXEC_CRASH_HP_NONE 0 |
| | 74 | #define KEXEC_CRASH_HP_ADD_CPU 1 |
| | 75 | #define KEXEC_CRASH_HP_REMOVE_CPU 2 |
| | 76 | #define KEXEC_CRASH_HP_ADD_MEMORY 3 |
| | 77 | #define KEXEC_CRASH_HP_REMOVE_MEMORY 4 |
| | 78 | #define KEXEC_CRASH_HP_INVALID_CPU -1U |
| | 79 | |
| | 80 | extern void __crash_kexec(struct pt_regs *regs); |
| | 81 | extern void crash_kexec(struct pt_regs *regs); |
| | 82 | int kexec_should_crash(struct task_struct *p); |
| | 83 | int kexec_crash_loaded(void); |
| | 84 | void crash_save_cpu(struct pt_regs *regs, int cpu); |
| | 85 | extern int kimage_crash_copy_vmcoreinfo(struct kimage *image); |
| | 86 | |
| | 87 | #else /* !CONFIG_CRASH_DUMP*/ |
| | 88 | struct pt_regs; |
| | 89 | struct task_struct; |
| | 90 | struct kimage; |
| | 91 | static inline void __crash_kexec(struct pt_regs *regs) { } |
| | 92 | static inline void crash_kexec(struct pt_regs *regs) { } |
| | 93 | static inline int kexec_should_crash(struct task_struct *p) { return 0; } |
| | 94 | static inline int kexec_crash_loaded(void) { return 0; } |
| | 95 | static inline void crash_save_cpu(struct pt_regs *regs, int cpu) {}; |
| | 96 | static inline int kimage_crash_copy_vmcoreinfo(struct kimage *image) { return 0; }; |
| | 97 | #endif /* CONFIG_CRASH_DUMP*/ |
| | 98 | |
| | 99 | #endif /* LINUX_CRASH_CORE_H */ |
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