projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 692f66f2 HB |
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 | ||
| 02aff848 BH |
9 | struct kimage; |
| 10 | ||
| 56a34d79 HB |
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 | ||
| 02aff848 BH |
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 | ||
| 479e5854 CX |
37 | #ifdef CONFIG_CRASH_DM_CRYPT |
| 38 | int crash_load_dm_crypt_keys(struct kimage *image); | |
| 62f17d9d | 39 | ssize_t dm_crypt_keys_read(char *buf, size_t count, u64 *ppos); |
| 479e5854 CX |
40 | #else |
| 41 | static inline int crash_load_dm_crypt_keys(struct kimage *image) {return 0; } | |
| 42 | #endif | |
| 02aff848 BH |
43 | |
| 44 | #ifndef arch_crash_handle_hotplug_event | |
| 11800571 | 45 | static inline void arch_crash_handle_hotplug_event(struct kimage *image, void *arg) { } |
| 02aff848 BH |
46 | #endif |
| 47 | ||
| 79365026 | 48 | int crash_check_hotplug_support(void); |
| 02aff848 | 49 | |
| 79365026 SJ |
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 | } | |
| 02aff848 BH |
55 | #endif |
| 56 | ||
| 57 | #ifndef crash_get_elfcorehdr_size | |
| 58 | static inline unsigned int crash_get_elfcorehdr_size(void) { return 0; } | |
| 59 | #endif | |
| 60 | ||
| 6f991cc3 ED |
61 | /* Alignment required for elf header segment */ |
| 62 | #define ELF_CORE_HEADER_ALIGN 4096 | |
| 63 | ||
| 6f991cc3 ED |
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 | ||
| 24726275 ED |
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 | ||
| 02aff848 BH |
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 | ||
| 692f66f2 | 99 | #endif /* LINUX_CRASH_CORE_H */ |