1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _UAPILINUX_KEXEC_H
3#define _UAPILINUX_KEXEC_H
4
5/* kexec system call -  It loads the new kernel to boot into.
6 * kexec does not sync, or unmount filesystems so if you need
7 * that to happen you need to do that yourself.
8 */
9
10#include <linux/types.h>
11
12/* kexec flags for different usage scenarios */
13#define KEXEC_ON_CRASH		0x00000001
14#define KEXEC_PRESERVE_CONTEXT	0x00000002
15#define KEXEC_UPDATE_ELFCOREHDR	0x00000004
16#define KEXEC_ARCH_MASK		0xffff0000
17
18/*
19 * Kexec file load interface flags.
20 * KEXEC_FILE_UNLOAD : Unload already loaded kexec/kdump image.
21 * KEXEC_FILE_ON_CRASH : Load/unload operation belongs to kdump image.
22 * KEXEC_FILE_NO_INITRAMFS : No initramfs is being loaded. Ignore the initrd
23 *                           fd field.
24 */
25#define KEXEC_FILE_UNLOAD	0x00000001
26#define KEXEC_FILE_ON_CRASH	0x00000002
27#define KEXEC_FILE_NO_INITRAMFS	0x00000004
28#define KEXEC_FILE_DEBUG	0x00000008
29
30/* These values match the ELF architecture values.
31 * Unless there is a good reason that should continue to be the case.
32 */
33#define KEXEC_ARCH_DEFAULT ( 0 << 16)
34#define KEXEC_ARCH_386     ( 3 << 16)
35#define KEXEC_ARCH_68K     ( 4 << 16)
36#define KEXEC_ARCH_PARISC  (15 << 16)
37#define KEXEC_ARCH_X86_64  (62 << 16)
38#define KEXEC_ARCH_PPC     (20 << 16)
39#define KEXEC_ARCH_PPC64   (21 << 16)
40#define KEXEC_ARCH_IA_64   (50 << 16)
41#define KEXEC_ARCH_ARM     (40 << 16)
42#define KEXEC_ARCH_S390    (22 << 16)
43#define KEXEC_ARCH_SH      (42 << 16)
44#define KEXEC_ARCH_MIPS_LE (10 << 16)
45#define KEXEC_ARCH_MIPS    ( 8 << 16)
46#define KEXEC_ARCH_AARCH64 (183 << 16)
47#define KEXEC_ARCH_RISCV   (243 << 16)
48#define KEXEC_ARCH_LOONGARCH	(258 << 16)
49
50/* The artificial cap on the number of segments passed to kexec_load. */
51#define KEXEC_SEGMENT_MAX 16
52
53#ifndef __KERNEL__
54/*
55 * This structure is used to hold the arguments that are used when
56 * loading  kernel binaries.
57 */
58struct kexec_segment {
59	const void *buf;
60	__kernel_size_t bufsz;
61	const void *mem;
62	__kernel_size_t memsz;
63};
64
65#endif /* __KERNEL__ */
66
67#endif /* _UAPILINUX_KEXEC_H */
68