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

 
 1/*
 2 * include/asm-s390/kexec.h
 3 *
 4 * (C) Copyright IBM Corp. 2005
 5 *
 6 * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
 7 *
 8 */
 9
10#ifndef _S390_KEXEC_H
11#define _S390_KEXEC_H
12
13#ifdef __KERNEL__
 
 
14#include <asm/page.h>
15#endif
16#include <asm/processor.h>
17/*
18 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
19 * I.e. Maximum page that is mapped directly into kernel memory,
20 * and kmap is not required.
21 */
22
23/* Maximum physical address we can use pages from */
24#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
25
26/* Maximum address we can reach in physical address mode */
27#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
28
29/* Maximum address we can use for the control pages */
30/* Not more than 2GB */
31#define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
32
 
 
 
 
 
 
33/* Allocate one page for the pdp and the second for the code */
34#define KEXEC_CONTROL_PAGE_SIZE 4096
35
 
 
 
36/* The native architecture */
37#define KEXEC_ARCH KEXEC_ARCH_S390
38
 
 
 
39/* Provide a dummy definition to avoid build failures. */
40static inline void crash_setup_regs(struct pt_regs *newregs,
41					struct pt_regs *oldregs) { }
42
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
43#endif /*_S390_KEXEC_H */