mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
607ca46e97
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
213 lines
6.2 KiB
C
213 lines
6.2 KiB
C
#ifndef LINUX_KEXEC_H
|
|
#define LINUX_KEXEC_H
|
|
|
|
#include <uapi/linux/kexec.h>
|
|
|
|
#ifdef CONFIG_KEXEC
|
|
#include <linux/list.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/elfcore.h>
|
|
#include <linux/elf.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_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_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
|
|
#define KEXEC_CORE_NOTE_NAME "CORE"
|
|
#define KEXEC_CORE_NOTE_NAME_BYTES ALIGN(sizeof(KEXEC_CORE_NOTE_NAME), 4)
|
|
#define KEXEC_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
|
|
/*
|
|
* 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 ( (KEXEC_NOTE_HEAD_BYTES * 2) + \
|
|
KEXEC_CORE_NOTE_NAME_BYTES + \
|
|
KEXEC_CORE_NOTE_DESC_BYTES )
|
|
#endif
|
|
|
|
/*
|
|
* This structure is used to hold the arguments that are used when loading
|
|
* kernel binaries.
|
|
*/
|
|
|
|
typedef unsigned long kimage_entry_t;
|
|
#define IND_DESTINATION 0x1
|
|
#define IND_INDIRECTION 0x2
|
|
#define IND_DONE 0x4
|
|
#define IND_SOURCE 0x8
|
|
|
|
struct kexec_segment {
|
|
void __user *buf;
|
|
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
|
|
|
|
struct kimage {
|
|
kimage_entry_t head;
|
|
kimage_entry_t *entry;
|
|
kimage_entry_t *last_entry;
|
|
|
|
unsigned long destination;
|
|
|
|
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 unuseable_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;
|
|
|
|
#ifdef ARCH_HAS_KIMAGE_ARCH
|
|
struct kimage_arch arch;
|
|
#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);
|
|
#ifdef CONFIG_COMPAT
|
|
extern asmlinkage long compat_sys_kexec_load(unsigned long entry,
|
|
unsigned long nr_segments,
|
|
struct compat_kexec_segment __user *segments,
|
|
unsigned long flags);
|
|
#endif
|
|
extern struct page *kimage_alloc_control_pages(struct kimage *image,
|
|
unsigned int order);
|
|
extern void crash_kexec(struct pt_regs *);
|
|
int kexec_should_crash(struct task_struct *);
|
|
void crash_save_cpu(struct pt_regs *regs, int cpu);
|
|
void crash_save_vmcoreinfo(void);
|
|
void crash_map_reserved_pages(void);
|
|
void crash_unmap_reserved_pages(void);
|
|
void arch_crash_save_vmcoreinfo(void);
|
|
__printf(1, 2)
|
|
void vmcoreinfo_append_str(const char *fmt, ...);
|
|
unsigned long paddr_vmcoreinfo_note(void);
|
|
|
|
#define VMCOREINFO_OSRELEASE(value) \
|
|
vmcoreinfo_append_str("OSRELEASE=%s\n", value)
|
|
#define VMCOREINFO_PAGESIZE(value) \
|
|
vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
|
|
#define VMCOREINFO_SYMBOL(name) \
|
|
vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
|
|
#define VMCOREINFO_SIZE(name) \
|
|
vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
|
|
(unsigned long)sizeof(name))
|
|
#define VMCOREINFO_STRUCT_SIZE(name) \
|
|
vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
|
|
(unsigned long)sizeof(struct name))
|
|
#define VMCOREINFO_OFFSET(name, field) \
|
|
vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
|
|
(unsigned long)offsetof(struct name, field))
|
|
#define VMCOREINFO_LENGTH(name, value) \
|
|
vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
|
|
#define VMCOREINFO_NUMBER(name) \
|
|
vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
|
|
#define VMCOREINFO_CONFIG(name) \
|
|
vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
|
|
|
|
extern struct kimage *kexec_image;
|
|
extern struct kimage *kexec_crash_image;
|
|
|
|
#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
|
|
|
|
#define VMCOREINFO_BYTES (4096)
|
|
#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
|
|
#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
|
|
#define VMCOREINFO_NOTE_SIZE (KEXEC_NOTE_HEAD_BYTES*2 + VMCOREINFO_BYTES \
|
|
+ VMCOREINFO_NOTE_NAME_BYTES)
|
|
|
|
/* Location of a reserved region to hold the crash kernel.
|
|
*/
|
|
extern struct resource crashk_res;
|
|
typedef u32 note_buf_t[KEXEC_NOTE_BYTES/4];
|
|
extern note_buf_t __percpu *crash_notes;
|
|
extern u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
|
|
extern size_t vmcoreinfo_size;
|
|
extern size_t vmcoreinfo_max_size;
|
|
|
|
int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
|
|
unsigned long long *crash_size, unsigned long long *crash_base);
|
|
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);
|
|
|
|
#else /* !CONFIG_KEXEC */
|
|
struct pt_regs;
|
|
struct task_struct;
|
|
static inline void crash_kexec(struct pt_regs *regs) { }
|
|
static inline int kexec_should_crash(struct task_struct *p) { return 0; }
|
|
#endif /* CONFIG_KEXEC */
|
|
#endif /* LINUX_KEXEC_H */
|