[mirror_ubuntu-artful-kernel.git] / include / linux / kexec.h

#ifndef LINUX_KEXEC_H
#define LINUX_KEXEC_H

#define IND_DESTINATION_BIT 0
#define IND_INDIRECTION_BIT 1
#define IND_DONE_BIT        2
#define IND_SOURCE_BIT      3

#define IND_DESTINATION  (1 << IND_DESTINATION_BIT)
#define IND_INDIRECTION  (1 << IND_INDIRECTION_BIT)
#define IND_DONE         (1 << IND_DONE_BIT)
#define IND_SOURCE       (1 << IND_SOURCE_BIT)
#define IND_FLAGS (IND_DESTINATION | IND_INDIRECTION | IND_DONE | IND_SOURCE)

#if !defined(__ASSEMBLY__)

#include <linux/crash_core.h>
#include <asm/io.h>

#include <uapi/linux/kexec.h>

#ifdef CONFIG_KEXEC_CORE
#include <linux/list.h>
#include <linux/compat.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <asm/kexec.h>

/* Verify architecture specific macros are defined */

#ifndef KEXEC_SOURCE_MEMORY_LIMIT
#error KEXEC_SOURCE_MEMORY_LIMIT not defined
#endif

#ifndef KEXEC_DESTINATION_MEMORY_LIMIT
#error KEXEC_DESTINATION_MEMORY_LIMIT not defined
#endif

#ifndef KEXEC_CONTROL_MEMORY_LIMIT
#error KEXEC_CONTROL_MEMORY_LIMIT not defined
#endif

#ifndef KEXEC_CONTROL_MEMORY_GFP
#define KEXEC_CONTROL_MEMORY_GFP (GFP_KERNEL | __GFP_NORETRY)
#endif

#ifndef KEXEC_CONTROL_PAGE_SIZE
#error KEXEC_CONTROL_PAGE_SIZE not defined
#endif

#ifndef KEXEC_ARCH
#error KEXEC_ARCH not defined
#endif

#ifndef KEXEC_CRASH_CONTROL_MEMORY_LIMIT
#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT KEXEC_CONTROL_MEMORY_LIMIT
#endif

#ifndef KEXEC_CRASH_MEM_ALIGN
#define KEXEC_CRASH_MEM_ALIGN PAGE_SIZE
#endif

#define KEXEC_CORE_NOTE_NAME	CRASH_CORE_NOTE_NAME

/*
 * The per-cpu notes area is a list of notes terminated by a "NULL"
 * note header.  For kdump, the code in vmcore.c runs in the context
 * of the second kernel to combine them into one note.
 */
#ifndef KEXEC_NOTE_BYTES
#define KEXEC_NOTE_BYTES	CRASH_CORE_NOTE_BYTES
#endif

/*
 * This structure is used to hold the arguments that are used when loading
 * kernel binaries.
 */

typedef unsigned long kimage_entry_t;

struct kexec_segment {
	/*
	 * This pointer can point to user memory if kexec_load() system
	 * call is used or will point to kernel memory if
	 * kexec_file_load() system call is used.
	 *
	 * Use ->buf when expecting to deal with user memory and use ->kbuf
	 * when expecting to deal with kernel memory.
	 */
	union {
		void __user *buf;
		void *kbuf;
	};
	size_t bufsz;
	unsigned long mem;
	size_t memsz;
};

#ifdef CONFIG_COMPAT
struct compat_kexec_segment {
	compat_uptr_t buf;
	compat_size_t bufsz;
	compat_ulong_t mem;	/* User space sees this as a (void *) ... */
	compat_size_t memsz;
};
#endif

#ifdef CONFIG_KEXEC_FILE
struct purgatory_info {
	/* Pointer to elf header of read only purgatory */
	Elf_Ehdr *ehdr;

	/* Pointer to purgatory sechdrs which are modifiable */
	Elf_Shdr *sechdrs;
	/*
	 * Temporary buffer location where purgatory is loaded and relocated
	 * This memory can be freed post image load
	 */
	void *purgatory_buf;

	/* Address where purgatory is finally loaded and is executed from */
	unsigned long purgatory_load_addr;
};

typedef int (kexec_probe_t)(const char *kernel_buf, unsigned long kernel_size);
typedef void *(kexec_load_t)(struct kimage *image, char *kernel_buf,
			     unsigned long kernel_len, char *initrd,
			     unsigned long initrd_len, char *cmdline,
			     unsigned long cmdline_len);
typedef int (kexec_cleanup_t)(void *loader_data);

#ifdef CONFIG_KEXEC_VERIFY_SIG
typedef int (kexec_verify_sig_t)(const char *kernel_buf,
				 unsigned long kernel_len);
#endif

struct kexec_file_ops {
	kexec_probe_t *probe;
	kexec_load_t *load;
	kexec_cleanup_t *cleanup;
#ifdef CONFIG_KEXEC_VERIFY_SIG
	kexec_verify_sig_t *verify_sig;
#endif
};

/**
 * struct kexec_buf - parameters for finding a place for a buffer in memory
 * @image:	kexec image in which memory to search.
 * @buffer:	Contents which will be copied to the allocated memory.
 * @bufsz:	Size of @buffer.
 * @mem:	On return will have address of the buffer in memory.
 * @memsz:	Size for the buffer in memory.
 * @buf_align:	Minimum alignment needed.
 * @buf_min:	The buffer can't be placed below this address.
 * @buf_max:	The buffer can't be placed above this address.
 * @top_down:	Allocate from top of memory.
 */
struct kexec_buf {
	struct kimage *image;
	void *buffer;
	unsigned long bufsz;
	unsigned long mem;
	unsigned long memsz;
	unsigned long buf_align;
	unsigned long buf_min;
	unsigned long buf_max;
	bool top_down;
};

int __weak arch_kexec_walk_mem(struct kexec_buf *kbuf,
			       int (*func)(u64, u64, void *));
extern int kexec_add_buffer(struct kexec_buf *kbuf);
int kexec_locate_mem_hole(struct kexec_buf *kbuf);
#endif /* CONFIG_KEXEC_FILE */

struct kimage {
	kimage_entry_t head;
	kimage_entry_t *entry;
	kimage_entry_t *last_entry;

	unsigned long start;
	struct page *control_code_page;
	struct page *swap_page;

	unsigned long nr_segments;
	struct kexec_segment segment[KEXEC_SEGMENT_MAX];

	struct list_head control_pages;
	struct list_head dest_pages;
	struct list_head unusable_pages;

	/* Address of next control page to allocate for crash kernels. */
	unsigned long control_page;

	/* Flags to indicate special processing */
	unsigned int type : 1;
#define KEXEC_TYPE_DEFAULT 0
#define KEXEC_TYPE_CRASH   1
	unsigned int preserve_context : 1;
	/* If set, we are using file mode kexec syscall */
	unsigned int file_mode:1;

#ifdef ARCH_HAS_KIMAGE_ARCH
	struct kimage_arch arch;
#endif

#ifdef CONFIG_KEXEC_FILE
	/* Additional fields for file based kexec syscall */
	void *kernel_buf;
	unsigned long kernel_buf_len;

	void *initrd_buf;
	unsigned long initrd_buf_len;

	char *cmdline_buf;
	unsigned long cmdline_buf_len;

	/* File operations provided by image loader */
	struct kexec_file_ops *fops;

	/* Image loader handling the kernel can store a pointer here */
	void *image_loader_data;

	/* Information for loading purgatory */
	struct purgatory_info purgatory_info;
#endif
};

/* kexec interface functions */
extern void machine_kexec(struct kimage *image);
extern int machine_kexec_prepare(struct kimage *image);
extern void machine_kexec_cleanup(struct kimage *image);
extern asmlinkage long sys_kexec_load(unsigned long entry,
					unsigned long nr_segments,
					struct kexec_segment __user *segments,
					unsigned long flags);
extern int kernel_kexec(void);
extern struct page *kimage_alloc_control_pages(struct kimage *image,
						unsigned int order);
extern int kexec_load_purgatory(struct kimage *image, unsigned long min,
				unsigned long max, int top_down,
				unsigned long *load_addr);
extern int kexec_purgatory_get_set_symbol(struct kimage *image,
					  const char *name, void *buf,
					  unsigned int size, bool get_value);
extern void *kexec_purgatory_get_symbol_addr(struct kimage *image,
					     const char *name);
extern void __crash_kexec(struct pt_regs *);
extern void crash_kexec(struct pt_regs *);
int kexec_should_crash(struct task_struct *);
int kexec_crash_loaded(void);
void crash_save_cpu(struct pt_regs *regs, int cpu);

extern struct kimage *kexec_image;
extern struct kimage *kexec_crash_image;
extern int kexec_load_disabled;

#ifndef kexec_flush_icache_page
#define kexec_flush_icache_page(page)
#endif

/* List of defined/legal kexec flags */
#ifndef CONFIG_KEXEC_JUMP
#define KEXEC_FLAGS    KEXEC_ON_CRASH
#else
#define KEXEC_FLAGS    (KEXEC_ON_CRASH | KEXEC_PRESERVE_CONTEXT)
#endif

/* List of defined/legal kexec file flags */
#define KEXEC_FILE_FLAGS	(KEXEC_FILE_UNLOAD | KEXEC_FILE_ON_CRASH | \
				 KEXEC_FILE_NO_INITRAMFS)

/* Location of a reserved region to hold the crash kernel.
 */
extern struct resource crashk_res;
extern struct resource crashk_low_res;
extern note_buf_t __percpu *crash_notes;

/* flag to track if kexec reboot is in progress */
extern bool kexec_in_progress;

int crash_shrink_memory(unsigned long new_size);
size_t crash_get_memory_size(void);
void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);

int __weak arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
					 unsigned long buf_len);
void * __weak arch_kexec_kernel_image_load(struct kimage *image);
int __weak arch_kimage_file_post_load_cleanup(struct kimage *image);
int __weak arch_kexec_kernel_verify_sig(struct kimage *image, void *buf,
					unsigned long buf_len);
int __weak arch_kexec_apply_relocations_add(const Elf_Ehdr *ehdr,
					Elf_Shdr *sechdrs, unsigned int relsec);
int __weak arch_kexec_apply_relocations(const Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
					unsigned int relsec);
void arch_kexec_protect_crashkres(void);
void arch_kexec_unprotect_crashkres(void);

#ifndef page_to_boot_pfn
static inline unsigned long page_to_boot_pfn(struct page *page)
{
	return page_to_pfn(page);
}
#endif

#ifndef boot_pfn_to_page
static inline struct page *boot_pfn_to_page(unsigned long boot_pfn)
{
	return pfn_to_page(boot_pfn);
}
#endif

#ifndef phys_to_boot_phys
static inline unsigned long phys_to_boot_phys(phys_addr_t phys)
{
	return phys;
}
#endif

#ifndef boot_phys_to_phys
static inline phys_addr_t boot_phys_to_phys(unsigned long boot_phys)
{
	return boot_phys;
}
#endif

static inline unsigned long virt_to_boot_phys(void *addr)
{
	return phys_to_boot_phys(__pa((unsigned long)addr));
}

static inline void *boot_phys_to_virt(unsigned long entry)
{
	return phys_to_virt(boot_phys_to_phys(entry));
}

#else /* !CONFIG_KEXEC_CORE */
struct pt_regs;
struct task_struct;
static inline void __crash_kexec(struct pt_regs *regs) { }
static inline void crash_kexec(struct pt_regs *regs) { }
static inline int kexec_should_crash(struct task_struct *p) { return 0; }
static inline int kexec_crash_loaded(void) { return 0; }
#define kexec_in_progress false
#endif /* CONFIG_KEXEC_CORE */

#endif /* !defined(__ASSEBMLY__) */

#endif /* LINUX_KEXEC_H */
Commit	Line	Data
dc009d92 EB	1	#ifndef LINUX_KEXEC_H
	2	#define LINUX_KEXEC_H
	3
cf2df639 GL	4	#define IND_DESTINATION_BIT 0
	5	#define IND_INDIRECTION_BIT 1
	6	#define IND_DONE_BIT 2
	7	#define IND_SOURCE_BIT 3
	8
	9	#define IND_DESTINATION (1 << IND_DESTINATION_BIT)
	10	#define IND_INDIRECTION (1 << IND_INDIRECTION_BIT)
	11	#define IND_DONE (1 << IND_DONE_BIT)
	12	#define IND_SOURCE (1 << IND_SOURCE_BIT)
b28c2ee8	13	#define IND_FLAGS (IND_DESTINATION \| IND_INDIRECTION \| IND_DONE \| IND_SOURCE)
cf2df639 GL	14
	15	#if !defined(__ASSEMBLY__)
	16
692f66f2	17	#include <linux/crash_core.h>
43546d86 RK	18	#include <asm/io.h>
43546d86 RK	19
607ca46e	20	#include <uapi/linux/kexec.h>
29a5c67e	21
2965faa5	22	#ifdef CONFIG_KEXEC_CORE
dc009d92	23	#include <linux/list.h>
dc009d92	24	#include <linux/compat.h>
9c15e852	25	#include <linux/ioport.h>
12db5562	26	#include <linux/module.h>
dc009d92 EB	27	#include <asm/kexec.h>
	28
	29	/* Verify architecture specific macros are defined */
	30
	31	#ifndef KEXEC_SOURCE_MEMORY_LIMIT
	32	#error KEXEC_SOURCE_MEMORY_LIMIT not defined
	33	#endif
	34
	35	#ifndef KEXEC_DESTINATION_MEMORY_LIMIT
	36	#error KEXEC_DESTINATION_MEMORY_LIMIT not defined
	37	#endif
	38
	39	#ifndef KEXEC_CONTROL_MEMORY_LIMIT
	40	#error KEXEC_CONTROL_MEMORY_LIMIT not defined
	41	#endif
	42
7e01b5ac	43	#ifndef KEXEC_CONTROL_MEMORY_GFP
dc5cccac	44	#define KEXEC_CONTROL_MEMORY_GFP (GFP_KERNEL \| __GFP_NORETRY)
7e01b5ac MS	45	#endif
7e01b5ac MS	46
163f6876 HY	47	#ifndef KEXEC_CONTROL_PAGE_SIZE
163f6876 HY	48	#error KEXEC_CONTROL_PAGE_SIZE not defined
dc009d92 EB	49	#endif
	50
	51	#ifndef KEXEC_ARCH
	52	#error KEXEC_ARCH not defined
	53	#endif
	54
3d214fae MH	55	#ifndef KEXEC_CRASH_CONTROL_MEMORY_LIMIT
	56	#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT KEXEC_CONTROL_MEMORY_LIMIT
	57	#endif
	58
558df720 MH	59	#ifndef KEXEC_CRASH_MEM_ALIGN
	60	#define KEXEC_CRASH_MEM_ALIGN PAGE_SIZE
	61	#endif
	62
692f66f2 HB	63	#define KEXEC_CORE_NOTE_NAME CRASH_CORE_NOTE_NAME
692f66f2 HB	64
6672f76a SH	65	/*
	66	* The per-cpu notes area is a list of notes terminated by a "NULL"
	67	* note header. For kdump, the code in vmcore.c runs in the context
	68	* of the second kernel to combine them into one note.
	69	*/
cb78edfd	70	#ifndef KEXEC_NOTE_BYTES
692f66f2	71	#define KEXEC_NOTE_BYTES CRASH_CORE_NOTE_BYTES
cb78edfd	72	#endif
6672f76a	73
dc009d92 EB	74	/*
	75	* This structure is used to hold the arguments that are used when loading
	76	* kernel binaries.
	77	*/
	78
	79	typedef unsigned long kimage_entry_t;
dc009d92	80
dc009d92	81	struct kexec_segment {
815d5704 VG	82	/*
	83	* This pointer can point to user memory if kexec_load() system
	84	* call is used or will point to kernel memory if
	85	* kexec_file_load() system call is used.
	86	*
	87	* Use ->buf when expecting to deal with user memory and use ->kbuf
	88	* when expecting to deal with kernel memory.
	89	*/
	90	union {
	91	void __user *buf;
	92	void *kbuf;
	93	};
dc009d92	94	size_t bufsz;
29a5c67e	95	unsigned long mem;
dc009d92 EB	96	size_t memsz;
	97	};
	98
	99	#ifdef CONFIG_COMPAT
	100	struct compat_kexec_segment {
	101	compat_uptr_t buf;
	102	compat_size_t bufsz;
	103	compat_ulong_t mem; /* User space sees this as a (void ) ... /
	104	compat_size_t memsz;
	105	};
	106	#endif
	107
978e30c9	108	#ifdef CONFIG_KEXEC_FILE
12db5562 VG	109	struct purgatory_info {
	110	/* Pointer to elf header of read only purgatory */
	111	Elf_Ehdr *ehdr;
	112
	113	/* Pointer to purgatory sechdrs which are modifiable */
	114	Elf_Shdr *sechdrs;
	115	/*
	116	* Temporary buffer location where purgatory is loaded and relocated
	117	* This memory can be freed post image load
	118	*/
	119	void *purgatory_buf;
	120
	121	/* Address where purgatory is finally loaded and is executed from */
	122	unsigned long purgatory_load_addr;
	123	};
	124
978e30c9 XP	125	typedef int (kexec_probe_t)(const char *kernel_buf, unsigned long kernel_size);
	126	typedef void (kexec_load_t)(struct kimage image, char *kernel_buf,
	127	unsigned long kernel_len, char *initrd,
	128	unsigned long initrd_len, char *cmdline,
	129	unsigned long cmdline_len);
	130	typedef int (kexec_cleanup_t)(void *loader_data);
	131
	132	#ifdef CONFIG_KEXEC_VERIFY_SIG
	133	typedef int (kexec_verify_sig_t)(const char *kernel_buf,
	134	unsigned long kernel_len);
	135	#endif
	136
	137	struct kexec_file_ops {
	138	kexec_probe_t *probe;
	139	kexec_load_t *load;
	140	kexec_cleanup_t *cleanup;
	141	#ifdef CONFIG_KEXEC_VERIFY_SIG
	142	kexec_verify_sig_t *verify_sig;
	143	#endif
	144	};
60fe3910 TJB	145
	146	/**
	147	* struct kexec_buf - parameters for finding a place for a buffer in memory
	148	* @image: kexec image in which memory to search.
	149	* @buffer: Contents which will be copied to the allocated memory.
	150	* @bufsz: Size of @buffer.
	151	* @mem: On return will have address of the buffer in memory.
	152	* @memsz: Size for the buffer in memory.
	153	* @buf_align: Minimum alignment needed.
	154	* @buf_min: The buffer can't be placed below this address.
	155	* @buf_max: The buffer can't be placed above this address.
	156	* @top_down: Allocate from top of memory.
	157	*/
	158	struct kexec_buf {
	159	struct kimage *image;
ec2b9bfa	160	void *buffer;
60fe3910 TJB	161	unsigned long bufsz;
	162	unsigned long mem;
	163	unsigned long memsz;
	164	unsigned long buf_align;
	165	unsigned long buf_min;
	166	unsigned long buf_max;
	167	bool top_down;
	168	};
	169
	170	int __weak arch_kexec_walk_mem(struct kexec_buf *kbuf,
	171	int (func)(u64, u64, void ));
ec2b9bfa	172	extern int kexec_add_buffer(struct kexec_buf *kbuf);
e2e806f9	173	int kexec_locate_mem_hole(struct kexec_buf *kbuf);
60fe3910	174	#endif /* CONFIG_KEXEC_FILE */
978e30c9	175
dc009d92 EB	176	struct kimage {
	177	kimage_entry_t head;
	178	kimage_entry_t *entry;
	179	kimage_entry_t *last_entry;
	180
dc009d92 EB	181	unsigned long start;
dc009d92 EB	182	struct page *control_code_page;
3ab83521	183	struct page *swap_page;
dc009d92 EB	184
	185	unsigned long nr_segments;
	186	struct kexec_segment segment[KEXEC_SEGMENT_MAX];
	187
	188	struct list_head control_pages;
	189	struct list_head dest_pages;
7d3e2bca	190	struct list_head unusable_pages;
dc009d92 EB	191
	192	/* Address of next control page to allocate for crash kernels. */
	193	unsigned long control_page;
	194
	195	/* Flags to indicate special processing */
	196	unsigned int type : 1;
	197	#define KEXEC_TYPE_DEFAULT 0
	198	#define KEXEC_TYPE_CRASH 1
3ab83521	199	unsigned int preserve_context : 1;
cb105258 VG	200	/* If set, we are using file mode kexec syscall */
cb105258 VG	201	unsigned int file_mode:1;
92be3d6b HY	202
	203	#ifdef ARCH_HAS_KIMAGE_ARCH
	204	struct kimage_arch arch;
	205	#endif
cb105258	206
978e30c9	207	#ifdef CONFIG_KEXEC_FILE
cb105258 VG	208	/* Additional fields for file based kexec syscall */
	209	void *kernel_buf;
	210	unsigned long kernel_buf_len;
	211
	212	void *initrd_buf;
	213	unsigned long initrd_buf_len;
	214
	215	char *cmdline_buf;
	216	unsigned long cmdline_buf_len;
	217
	218	/* File operations provided by image loader */
	219	struct kexec_file_ops *fops;
	220
	221	/* Image loader handling the kernel can store a pointer here */
	222	void *image_loader_data;
12db5562 VG	223
	224	/* Information for loading purgatory */
	225	struct purgatory_info purgatory_info;
978e30c9	226	#endif
cb105258	227	};
dc009d92 EB	228
dc009d92 EB	229	/* kexec interface functions */
3ab83521	230	extern void machine_kexec(struct kimage *image);
dc009d92 EB	231	extern int machine_kexec_prepare(struct kimage *image);
	232	extern void machine_kexec_cleanup(struct kimage *image);
	233	extern asmlinkage long sys_kexec_load(unsigned long entry,
72414d3f MS	234	unsigned long nr_segments,
	235	struct kexec_segment __user *segments,
	236	unsigned long flags);
3ab83521	237	extern int kernel_kexec(void);
72414d3f MS	238	extern struct page kimage_alloc_control_pages(struct kimage image,
72414d3f MS	239	unsigned int order);
12db5562 VG	240	extern int kexec_load_purgatory(struct kimage *image, unsigned long min,
	241	unsigned long max, int top_down,
	242	unsigned long *load_addr);
	243	extern int kexec_purgatory_get_set_symbol(struct kimage *image,
	244	const char name, void buf,
	245	unsigned int size, bool get_value);
	246	extern void kexec_purgatory_get_symbol_addr(struct kimage image,
	247	const char *name);
7bbee5ca	248	extern void __crash_kexec(struct pt_regs *);
6e274d14 AN	249	extern void crash_kexec(struct pt_regs *);
6e274d14 AN	250	int kexec_should_crash(struct task_struct *);
21db79e8	251	int kexec_crash_loaded(void);
85916f81	252	void crash_save_cpu(struct pt_regs *regs, int cpu);
fd59d231	253
dc009d92	254	extern struct kimage *kexec_image;
c330dda9	255	extern struct kimage *kexec_crash_image;
7984754b	256	extern int kexec_load_disabled;
dc009d92	257
a7956113 ZN	258	#ifndef kexec_flush_icache_page
	259	#define kexec_flush_icache_page(page)
	260	#endif
	261
3ab83521 HY	262	/* List of defined/legal kexec flags */
	263	#ifndef CONFIG_KEXEC_JUMP
	264	#define KEXEC_FLAGS KEXEC_ON_CRASH
	265	#else
	266	#define KEXEC_FLAGS (KEXEC_ON_CRASH \| KEXEC_PRESERVE_CONTEXT)
	267	#endif
dc009d92	268
cb105258 VG	269	/* List of defined/legal kexec file flags */
	270	#define KEXEC_FILE_FLAGS (KEXEC_FILE_UNLOAD \| KEXEC_FILE_ON_CRASH \| \
	271	KEXEC_FILE_NO_INITRAMFS)
	272
dc009d92 EB	273	/* Location of a reserved region to hold the crash kernel.
	274	*/
	275	extern struct resource crashk_res;
0212f915	276	extern struct resource crashk_low_res;
43cf38eb	277	extern note_buf_t __percpu *crash_notes;
dc009d92	278
4fc9bbf9 KA	279	/* flag to track if kexec reboot is in progress */
	280	extern bool kexec_in_progress;
	281
06a7f711 AW	282	int crash_shrink_memory(unsigned long new_size);
06a7f711 AW	283	size_t crash_get_memory_size(void);
c0bb9e45	284	void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
a7956113	285
a43cac0d DY	286	int __weak arch_kexec_kernel_image_probe(struct kimage image, void buf,
	287	unsigned long buf_len);
	288	void * __weak arch_kexec_kernel_image_load(struct kimage *image);
	289	int __weak arch_kimage_file_post_load_cleanup(struct kimage *image);
	290	int __weak arch_kexec_kernel_verify_sig(struct kimage image, void buf,
	291	unsigned long buf_len);
	292	int __weak arch_kexec_apply_relocations_add(const Elf_Ehdr *ehdr,
	293	Elf_Shdr *sechdrs, unsigned int relsec);
	294	int __weak arch_kexec_apply_relocations(const Elf_Ehdr ehdr, Elf_Shdr sechdrs,
	295	unsigned int relsec);
9b492cf5 XP	296	void arch_kexec_protect_crashkres(void);
9b492cf5 XP	297	void arch_kexec_unprotect_crashkres(void);
a43cac0d	298
43546d86 RK	299	#ifndef page_to_boot_pfn
	300	static inline unsigned long page_to_boot_pfn(struct page *page)
	301	{
	302	return page_to_pfn(page);
	303	}
	304	#endif
	305
	306	#ifndef boot_pfn_to_page
	307	static inline struct page *boot_pfn_to_page(unsigned long boot_pfn)
	308	{
	309	return pfn_to_page(boot_pfn);
	310	}
	311	#endif
	312
	313	#ifndef phys_to_boot_phys
	314	static inline unsigned long phys_to_boot_phys(phys_addr_t phys)
	315	{
	316	return phys;
	317	}
	318	#endif
	319
	320	#ifndef boot_phys_to_phys
	321	static inline phys_addr_t boot_phys_to_phys(unsigned long boot_phys)
	322	{
	323	return boot_phys;
	324	}
	325	#endif
	326
	327	static inline unsigned long virt_to_boot_phys(void *addr)
	328	{
	329	return phys_to_boot_phys(__pa((unsigned long)addr));
	330	}
	331
	332	static inline void *boot_phys_to_virt(unsigned long entry)
	333	{
	334	return phys_to_virt(boot_phys_to_phys(entry));
	335	}
	336
2965faa5	337	#else /* !CONFIG_KEXEC_CORE */
6e274d14 AN	338	struct pt_regs;
6e274d14 AN	339	struct task_struct;
7bbee5ca	340	static inline void __crash_kexec(struct pt_regs *regs) { }
6e274d14 AN	341	static inline void crash_kexec(struct pt_regs *regs) { }
6e274d14 AN	342	static inline int kexec_should_crash(struct task_struct *p) { return 0; }
21db79e8	343	static inline int kexec_crash_loaded(void) { return 0; }
2b94ed24	344	#define kexec_in_progress false
2965faa5	345	#endif /* CONFIG_KEXEC_CORE */
cf2df639 GL	346
	347	#endif /* !defined(__ASSEBMLY__) */
	348
dc009d92	349	#endif /* LINUX_KEXEC_H */