mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-05 08:44:14 +02:00
Jinjie Ruan
b0e06c5a30
The crash memory exclude of crashk_res and crashk_cma memory on powerpc are almost identical to the generic crash_exclude_core_ranges(). By introducing the architecture-specific arch_crash_exclude_mem_range() function with a default implementation of crash_exclude_mem_range(), and using crash_exclude_mem_range_guarded as powerpc's separate implementation, the generic crash_exclude_core_ranges() helper function can be reused. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Hari Bathini <hbathini@linux.ibm.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Mahesh Salgaonkar <mahesh@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Cc: Shivang Upadhyay <shivangu@linux.ibm.com> Acked-by: Breno leitao <leitao@debian.org> Acked-by: Baoquan He <bhe@redhat.com> Reviewed-by: Sourabh Jain <sourabhjain@linux.ibm.com> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com> Link: https://patch.msgid.link/20260629094746.191843-9-ruanjinjie@huawei.com Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
109 lines
3.4 KiB
C
109 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef LINUX_CRASH_CORE_H
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#define LINUX_CRASH_CORE_H
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#include <linux/linkage.h>
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#include <linux/elfcore.h>
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#include <linux/elf.h>
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struct kimage;
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struct crash_mem {
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unsigned int max_nr_ranges;
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unsigned int nr_ranges;
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struct range ranges[] __counted_by(max_nr_ranges);
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};
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#ifdef CONFIG_CRASH_DUMP
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int crash_shrink_memory(unsigned long new_size);
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ssize_t crash_get_memory_size(void);
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#ifndef arch_kexec_protect_crashkres
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/*
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* Protection mechanism for crashkernel reserved memory after
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* the kdump kernel is loaded.
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*
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* Provide an empty default implementation here -- architecture
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* code may override this
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*/
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static inline void arch_kexec_protect_crashkres(void) { }
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#endif
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#ifndef arch_kexec_unprotect_crashkres
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static inline void arch_kexec_unprotect_crashkres(void) { }
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#endif
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#ifndef arch_crash_handle_hotplug_event
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static inline void arch_crash_handle_hotplug_event(struct kimage *image, void *arg) { }
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#endif
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int crash_check_hotplug_support(void);
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#ifndef arch_crash_hotplug_support
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static inline int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags)
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{
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return 0;
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}
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#endif
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#ifndef crash_get_elfcorehdr_size
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static inline unsigned int crash_get_elfcorehdr_size(void) { return 0; }
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#endif
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/* Alignment required for elf header segment */
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#define ELF_CORE_HEADER_ALIGN 4096
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extern int crash_exclude_mem_range(struct crash_mem *mem,
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unsigned long long mstart,
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unsigned long long mend);
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extern int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map,
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void **addr, unsigned long *sz);
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extern int crash_prepare_headers(int need_kernel_map, void **addr,
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unsigned long *sz, unsigned long *nr_mem_ranges);
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extern int crash_exclude_core_ranges(struct crash_mem **cmem);
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struct kimage;
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struct kexec_segment;
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#define KEXEC_CRASH_HP_NONE 0
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#define KEXEC_CRASH_HP_ADD_CPU 1
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#define KEXEC_CRASH_HP_REMOVE_CPU 2
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#define KEXEC_CRASH_HP_ADD_MEMORY 3
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#define KEXEC_CRASH_HP_REMOVE_MEMORY 4
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#define KEXEC_CRASH_HP_INVALID_CPU -1U
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extern void __crash_kexec(struct pt_regs *regs);
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extern void crash_kexec(struct pt_regs *regs);
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int kexec_should_crash(struct task_struct *p);
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int kexec_crash_loaded(void);
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void crash_save_cpu(struct pt_regs *regs, int cpu);
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extern int kimage_crash_copy_vmcoreinfo(struct kimage *image);
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extern unsigned int arch_get_system_nr_ranges(void);
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extern int arch_crash_populate_cmem(struct crash_mem *cmem);
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extern int arch_crash_exclude_ranges(struct crash_mem *cmem);
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extern int arch_crash_exclude_mem_range(struct crash_mem **mem,
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unsigned long long mstart,
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unsigned long long mend);
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#else /* !CONFIG_CRASH_DUMP*/
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struct pt_regs;
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struct task_struct;
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struct kimage;
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static inline void __crash_kexec(struct pt_regs *regs) { }
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static inline void crash_kexec(struct pt_regs *regs) { }
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static inline int kexec_should_crash(struct task_struct *p) { return 0; }
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static inline int kexec_crash_loaded(void) { return 0; }
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static inline void crash_save_cpu(struct pt_regs *regs, int cpu) {};
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static inline int kimage_crash_copy_vmcoreinfo(struct kimage *image) { return 0; };
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#endif /* CONFIG_CRASH_DUMP*/
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#ifdef CONFIG_CRASH_DM_CRYPT
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int crash_load_dm_crypt_keys(struct kimage *image);
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ssize_t dm_crypt_keys_read(char *buf, size_t count, u64 *ppos);
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#else
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static inline int crash_load_dm_crypt_keys(struct kimage *image) {return 0; }
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#endif
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#endif /* LINUX_CRASH_CORE_H */
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