[linux-2.6-block.git] / arch / s390 / include / asm / kexec.h

/* 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

bool is_kdump_kernel(void);
#define is_kdump_kernel is_kdump_kernel
#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 */
Commit	Line	Data
	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. */
	52	static inline void crash_setup_regs(struct pt_regs *newregs,
	53	struct pt_regs *oldregs) { }
	54
	55	struct kimage;
	56	struct 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
	72	int s390_verify_sig(const char *kernel, unsigned long kernel_len);
	73	void kexec_file_add_components(struct kimage image,
	74	int (add_kernel)(struct kimage image,
	75	struct s390_load_data *data));
	76	int arch_kexec_do_relocs(int r_type, void *loc, unsigned long val,
	77	unsigned long addr);
	78
	79	#define ARCH_HAS_KIMAGE_ARCH
	80
	81	struct kimage_arch {
	82	void *ipl_buf;
	83	};
	84
	85	extern const struct kexec_file_ops s390_kexec_image_ops;
	86	extern const struct kexec_file_ops s390_kexec_elf_ops;
	87
	88	#ifdef CONFIG_CRASH_DUMP
	89	void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
	90	#define crash_free_reserved_phys_range crash_free_reserved_phys_range
	91
	92	void arch_kexec_protect_crashkres(void);
	93	#define arch_kexec_protect_crashkres arch_kexec_protect_crashkres
	94
	95	void arch_kexec_unprotect_crashkres(void);
	96	#define arch_kexec_unprotect_crashkres arch_kexec_unprotect_crashkres
	97
	98	bool is_kdump_kernel(void);
	99	#define is_kdump_kernel is_kdump_kernel
	100	#endif
	101
	102	#ifdef CONFIG_KEXEC_FILE
	103	struct purgatory_info;
	104	int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
	105	Elf_Shdr *section,
	106	const Elf_Shdr *relsec,
	107	const Elf_Shdr *symtab);
	108	#define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add
	109
	110	int arch_kimage_file_post_load_cleanup(struct kimage *image);
	111	#define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
	112	#endif
	113	#endif /_S390_KEXEC_H /