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/* 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 <asm/processor.h>
13#include <asm/page.h>
 
14/*
15 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
16 * I.e. Maximum page that is mapped directly into kernel memory,
17 * and kmap is not required.
18 */
19
20/* Maximum physical address we can use pages from */
21#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
22
23/* Maximum address we can reach in physical address mode */
24#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
25
26/* Maximum address we can use for the control pages */
27/* Not more than 2GB */
28#define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
29
30/* Allocate control page with GFP_DMA */
31#define KEXEC_CONTROL_MEMORY_GFP GFP_DMA
32
33/* Maximum address we can use for the crash control pages */
34#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)
35
36/* Allocate one page for the pdp and the second for the code */
37#define KEXEC_CONTROL_PAGE_SIZE 4096
38
39/* Alignment of crashkernel memory */
40#define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE
41
42/* The native architecture */
43#define KEXEC_ARCH KEXEC_ARCH_S390
44
 
 
 
45/* Provide a dummy definition to avoid build failures. */
46static inline void crash_setup_regs(struct pt_regs *newregs,
47					struct pt_regs *oldregs) { }
48
49struct kimage;
50struct s390_load_data {
51	/* Pointer to the kernel buffer. Used to register cmdline etc.. */
52	void *kernel_buf;
53
 
 
 
 
 
 
54	/* Total size of loaded segments in memory. Used as an offset. */
55	size_t memsz;
56
57	/* Load address of initrd. Used to register INITRD_START in kernel. */
58	unsigned long initrd_load_addr;
59};
60
61int kexec_file_add_purgatory(struct kimage *image,
62			     struct s390_load_data *data);
63int kexec_file_add_initrd(struct kimage *image,
64			  struct s390_load_data *data,
65			  char *initrd, unsigned long initrd_len);
66int *kexec_file_update_kernel(struct kimage *iamge,
67			      struct s390_load_data *data);
 
 
 
 
 
68
69extern const struct kexec_file_ops s390_kexec_image_ops;
70extern const struct kexec_file_ops s390_kexec_elf_ops;
71
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
72#endif /*_S390_KEXEC_H */