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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | /* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright IBM Corp. 2005 * * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com> * */ #ifndef _S390_KEXEC_H #define _S390_KEXEC_H #include <linux/module.h> #include <asm/processor.h> #include <asm/page.h> #include <asm/setup.h> /* * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return. * I.e. Maximum page that is mapped directly into kernel memory, * and kmap is not required. */ /* Maximum physical address we can use pages from */ #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) /* Maximum address we can reach in physical address mode */ #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) /* Maximum address we can use for the control pages */ /* Not more than 2GB */ #define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31) /* Allocate control page with GFP_DMA */ #define KEXEC_CONTROL_MEMORY_GFP (GFP_DMA | __GFP_NORETRY) /* Maximum address we can use for the crash control pages */ #define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL) /* Allocate one page for the pdp and the second for the code */ #define KEXEC_CONTROL_PAGE_SIZE 4096 /* Alignment of crashkernel memory */ #define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE /* The native architecture */ #define KEXEC_ARCH KEXEC_ARCH_S390 /* Allow kexec_file to load a segment to 0 */ #define KEXEC_BUF_MEM_UNKNOWN -1 /* Provide a dummy definition to avoid build failures. */ static inline void crash_setup_regs(struct pt_regs *newregs, struct pt_regs *oldregs) { } struct kimage; struct s390_load_data { /* Pointer to the kernel buffer. Used to register cmdline etc.. */ void *kernel_buf; /* Load address of the kernel_buf. */ unsigned long kernel_mem; /* Parmarea in the kernel buffer. */ struct parmarea *parm; /* Total size of loaded segments in memory. Used as an offset. */ size_t memsz; struct ipl_report *report; }; int s390_verify_sig(const char *kernel, unsigned long kernel_len); void *kexec_file_add_components(struct kimage *image, int (*add_kernel)(struct kimage *image, struct s390_load_data *data)); int arch_kexec_do_relocs(int r_type, void *loc, unsigned long val, unsigned long addr); #define ARCH_HAS_KIMAGE_ARCH struct kimage_arch { void *ipl_buf; }; extern const struct kexec_file_ops s390_kexec_image_ops; extern const struct kexec_file_ops s390_kexec_elf_ops; #ifdef CONFIG_CRASH_DUMP void crash_free_reserved_phys_range(unsigned long begin, unsigned long end); #define crash_free_reserved_phys_range crash_free_reserved_phys_range void arch_kexec_protect_crashkres(void); #define arch_kexec_protect_crashkres arch_kexec_protect_crashkres void arch_kexec_unprotect_crashkres(void); #define arch_kexec_unprotect_crashkres arch_kexec_unprotect_crashkres #endif #ifdef CONFIG_KEXEC_FILE struct purgatory_info; int arch_kexec_apply_relocations_add(struct purgatory_info *pi, Elf_Shdr *section, const Elf_Shdr *relsec, const Elf_Shdr *symtab); #define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add int arch_kimage_file_post_load_cleanup(struct kimage *image); #define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup #endif #endif /*_S390_KEXEC_H */ |